Patent application number | Description | Published |
20130113428 | MULTI-SERIES BATTERY CONTROL SYSTEM - A multi-series battery control system comprises a plurality of unit battery cell of which unit consists of multiple battery cells connected in series; a plurality of control IC comprising a control circuit for controlling the unit battery cell; a main controller that sends and receives signal to/from the control ICs via an insulation; means for sending an abnormality signal, which represents the existence or the absence of abnormality of the control ICs or the battery cells, to the main controller from the control ICs, responding to the first signal outputted from the main controller via the insulation; and means for searching contents of the abnormality in the control ICs or the battery cells and sending the abnormality contents signal based on the search, to the main controller from the control ICs, responding to the second signal outputted from the main controller via the insulation. | 05-09-2013 |
20130119936 | MULTI-SERIES BATTERY CONTROL SYSTEM - A multi-series battery control system comprises a plurality of unit battery cell of which unit consists of multiple battery cells connected in series; a plurality of control IC comprising a control circuit for controlling the unit battery cell; a main controller that sends and receives signal to/from the control ICs via an insulation; means for sending an abnormality signal, which represents the existence or the absence of abnormality of the control ICs or the battery cells, to the main controller from the control ICs, responding to the first signal outputted from the main controller via the insulation; and means for searching contents of the abnormality in the control ICs or the battery cells and sending the abnormality contents signal based on the search, to the main controller from the control ICs, responding to the second signal outputted from the main controller via the insulation. | 05-16-2013 |
20140312913 | BATTERY MONITORING APPARATUS AND BATTERY MONITORING SYSTEM - A battery monitoring apparatus comprises a reception section to receive a radio signal and to output power and a demodulated signal according to the radio signal; a first power source circuit to perform power supply based on the power; a decode circuit to operate upon receiving the power supply from the first power source circuit and to output an activation signal and a command based on the demodulated signal; a second power source circuit to be activated according to the activation signal and to perform power supply; a battery monitoring circuit to operate upon receiving the power supply from the second power source circuit and to output a monitoring result of a state of the battery according to the command; and a transmission section to operate upon receiving the power supply from the second power source circuit and to wirelessly transmit the monitoring result. | 10-23-2014 |
20140327400 | BATTERY SYSTEM MONITORING APPARATUS AND ELECTRIC STORAGE DEVICE INCLUDING THE SAME - A battery system monitoring apparatus for monitoring a cell group having a plurality of battery cells, and includes a cell controller IC which monitors and controls the states of the plurality of battery cells. A battery controller controls the cell controller IC and a plurality of voltage detection lines measure the voltage across the terminals of the battery cell. The voltage detection lines connect positive and negative electrodes of the battery cell, respectively, to a plurality of voltage input terminals of the cell controller IC. A power line connects the positive electrode of the battery cell having the highest potential among the plurality of battery cells to a power supply terminal of the cell controller IC and a ground line which connects the negative electrode of the battery cell having the lowest potential among the plurality of battery cells to a ground terminal of the cell controller IC. | 11-06-2014 |
20140354291 | BATTERY MONITORING SYSTEM, HOST CONTROLLER, AND BATTERY MONITORING DEVICE - A battery monitoring system includes a plurality of battery monitoring devices connected to a battery formed by connecting a plurality of battery cell groups in series, and monitor a state of the battery for the respective battery cell groups, each of the plurality of battery cell groups being of one or a plurality of battery cells connected in series, and a controller that performs wireless communication with the plurality of battery monitoring devices. First identification information portions which are different from each other are set in the plurality of battery monitoring devices in advance, and second identification information corresponding to an order of potentials of the battery cell groups in the battery, to which the battery monitoring devices are connected, is assigned to each of the plurality of battery monitoring devices. The controller stores a relationship between the first and second identification information for each battery monitoring device. | 12-04-2014 |
20150155722 | BATTERY MONITORING AND CONTROL INTEGRATED CIRCUIT AND BATTERY SYSTEM - A battery monitoring and control integrated circuit is connected to a cell group having a plurality of series-connected single cells for monitoring and controlling the single cells, and includes: a first start input terminal for connecting to a DC signal generation circuit which generates a DC signal based on an AC start signal input from the outside; a start detection unit which detects the DC signal and activates the battery monitoring and control integrated circuit; and a start output unit which outputs the AC start signal to the outside after the activation of the battery monitoring and control integrated circuit. | 06-04-2015 |
Patent application number | Description | Published |
20090206525 | Method for Producing Porous Silica Ceramic Material - The present invention provides a method for producing a porous silica ceramic material, wherein the method includes a step of forming a mixture including silica particles, a binder and a plasticizer, a step of imparting porosity to a green obtained by the forming of the mixture, by extracting the plasticizer from the green, a step of impregnating the green to which the porosity has been imparted with a sintering aid, and a step of firing the green impregnated with the sintering aid. | 08-20-2009 |
20110244335 | SEPARATION MEMBRANE FOR BATTERY, AND BATTERY - An object of the present invention is to provide a separation membrane for a battery, which is excellent in heat resistance, does not expand and shrink depending on a temperature history, has no problem that, even when pressure is applied at a point due to external pressure, dendrite growth or the like, it is broken at the pressure point and its function is damaged at the broken part, and has no problem that the ionic conductivity decreases to decrease the battery performance, and to provide a battery equipped with such a separation membrane for a battery. | 10-06-2011 |
20110269621 | Porous body and method of producing the same - The present invention provides a porous body having a pH adjusting function. This porous body can be obtained by a method including the steps of preparing a mixture including a glass powder A containing an alkali component, a powder B including at least one crystal selected from a) a clay mineral that has a layered crystal structure and b) a zeolite, and a powder C of a water-soluble inorganic salt, the mixture containing 0.05 to 3 parts by mass of the powder B and 0.2 to 4 parts by mass of the powder C with respect to 1 part by mass of the glass powder A; forming the mixture into a shaped body; firing the shaped body at a temperature lower than a melting point of the water-soluble inorganic salt and equal to or higher than a softening point of the glass contained in the glass powder A to obtain a fired body; and leaching the water-soluble inorganic salt from the fired body to obtain a granular porous body. The main component of the powder B is at least one crystal selected from a 1:1 type mineral, a 2:1 type mineral other than a smectite mineral, a mixed-layer type mineral, a 2:1 ribbon type mineral, and a zeolite. | 11-03-2011 |
Patent application number | Description | Published |
20100063819 | LANGUAGE MODEL LEARNING SYSTEM, LANGUAGE MODEL LEARNING METHOD, AND LANGUAGE MODEL LEARNING PROGRAM - A language model learning system for learning a language model on an identifiable basis relating to a word error rate used in speech recognition. The language model learning system ( | 03-11-2010 |
20100094629 | WEIGHT COEFFICIENT LEARNING SYSTEM AND AUDIO RECOGNITION SYSTEM - A weighting factor learning system includes an audio recognition section that recognizes learning audio data and outputting the recognition result; a weighting factor updating section that updates a weighting factor applied to a score obtained from an acoustic model and a language model so that the difference between a correct-answer score calculated with the use of a correct-answer text of the learning audio data and a score of the recognition result becomes large; a convergence determination section that determines, with the use of the score after updating, whether to return to the weighting factor updating section to update the weighting factor again; and a weighting factor convergence determination section that determines, with the use of the score after updating, whether to return to the audio recognition section to perform the process again and update the weighting factor using the weighting factor updating section. | 04-15-2010 |
20100114572 | SPEAKER SELECTING DEVICE, SPEAKER ADAPTIVE MODEL CREATING DEVICE, SPEAKER SELECTING METHOD, SPEAKER SELECTING PROGRAM, AND SPEAKER ADAPTIVE MODEL MAKING PROGRAM - To enable selection of a speaker, the acoustic feature value of which is similar to that of an utterance speaker, with accuracy and stability, while adapting to changes even when the acoustic feature value of the speaker changes every moment. A speaker score calculating means ( | 05-06-2010 |
20100204985 | FREQUENCY AXIS WARPING FACTOR ESTIMATION APPARATUS, SYSTEM, METHOD AND PROGRAM - A warping factor estimation system comprises label information generation unit that outputs voice/non-voice label information, warp model storage unit in which a probability model representing voice and non-voice occurrence probabilities is stored, and warp estimation unit that calculates a warping factor in the frequency axis direction using the probability model representing voice and non-voice occurrence probabilities, voice and non-voice labels, and a cepstrum. | 08-12-2010 |
20100318358 | RECOGNIZER WEIGHT LEARNING DEVICE, SPEECH RECOGNIZING DEVICE, AND SYSTEM - A speech recognition apparatus ( | 12-16-2010 |
20100324897 | AUDIO RECOGNITION DEVICE AND AUDIO RECOGNITION METHOD - Acoustic models and language models are learned according to a speaking length which indicates a length of a speaking section in speech data, and speech recognition process is implemented by using the learned acoustic models and language models. A speech recognition apparatus includes means ( | 12-23-2010 |
20110071825 | DEVICE, METHOD AND PROGRAM FOR VOICE DETECTION AND RECORDING MEDIUM - To this end, a voice detection device includes a band-based power calculation unit that calculates a total of signal power values (sub-band power) of signals entered from the microphones from one preset frequency width (sub-band) to another. The voice detection device also includes a band-based noise estimation unit that estimates the sub-band based noise power, and a sub-band based SNR calculation unit. The sub-band based SNR calculation unit calculates a sub-band SNR from one sub-band to another to output the largest one of the sub-band SNRs as an SNR for a microphone of interest. The voice detection device further includes a voice/non-voice decision unit that determines the voice/non-voice using the SNR for the microphone of interest. | 03-24-2011 |
20110202339 | SPEECH SOUND DETECTION APPARATUS - A speech sound detection apparatus receives an input audio signal (as a sound reception unit), and computes input power that indicates a magnitude of the sound represented by the audio signal (as an input power computation unit). The apparatus estimates a correction function that is a continuous function defining a relation between a certain frequency and a correction coefficient used to approximate the input power computed at that frequency to the reference power predetermined for that frequency (as a correction function estimation unit). The apparatus corrects the input power at every frequency, based upon the correction coefficient that is obtained in accordance with the relation defined by the estimated correction function (as an input power correcting unit). The apparatus further determines whether or not the sound represented by the received audio signal is speech sound, based upon the corrected input power (as a speech sound detection unit). | 08-18-2011 |
20110225439 | SIGNAL CORRECTION APPARATUS - A signal correction apparatus receives an input audio signal (serving as a first sound reception means). The signal correction apparatus computes, at every frequency, first power that indicates magnitude of sound represented by the input audio signal (serving as a first power computation means). The signal correction apparatus estimates a correction function that is a continuous function defining a relation between each frequency and a correction coefficient used to approximate the first power computed at that frequency to the reference power predetermined for that frequency (serving as a correction function estimation means). The signal correction apparatus multiplies the computed first power by the correction coefficient acquired in accordance with the relation defined by the estimated correction function so as to correct the first power at every frequency (serving as a power correcting means). | 09-15-2011 |
20120004916 | SPEECH SIGNAL PROCESSING DEVICE - A speech signal processing device is equipped with a power acquisition unit, a probability distribution acquisition unit, and a correspondence degree determination unit. The power acquisition unit accepts an inputted speech signal and, based on the accepted speech signal, acquires power representing the intensity of a speech sound represented by the speech signal. The probability distribution acquisition unit acquires a probability distribution using the intensity of the power acquired by the power acquisition unit as a random variable. The correspondence degree determination unit determines whether a correspondence degree representing a degree that power acquired by the power acquisition unit in a case that a predetermined reference speech signal is inputted into the power acquisition unit corresponds with predetermined reference power is higher than a predetermined reference correspondence degree, based on the probability distribution acquired by the probability distribution acquisition unit. | 01-05-2012 |
20120029915 | METHOD FOR PROCESSING MULTICHANNEL ACOUSTIC SIGNAL, SYSTEM THEREFOR, AND PROGRAM - A method for processing multichannel acoustic signals which processes input signals of a plurality of channels including the voices of a plurality of speaking persons. The method is characterized by detecting the voice section of each speaking person or each channel, detecting overlapped sections wherein the detected voice sections are common between channels, determining a channel to be subjected to crosstalk removal and the section thereof by use of at least voice sections not including the detected overlapped sections, and removing crosstalk in the sections of the channel to be subjected to the crosstalk removal. | 02-02-2012 |
20120029916 | METHOD FOR PROCESSING MULTICHANNEL ACOUSTIC SIGNAL, SYSTEM THEREFOR, AND PROGRAM - A method for processing multichannel acoustic signals which is characterized by calculating the feature quantity of each channel from the input signals of a plurality of channels, calculating similarity between the channels in the feature quantity of each channel, selecting channels having high similarity, and separating signals using the input signals of the selected channels. | 02-02-2012 |
20120046940 | METHOD FOR PROCESSING MULTICHANNEL ACOUSTIC SIGNAL, SYSTEM THEREOF, AND PROGRAM - A method for processing multichannel acoustic signals, whereby input signals of a plurality of channels including the voices of a plurality of speaking persons are processed. The method is characterized by comprising: calculating the first feature quantity of the input signals of the multichannels for each channel; calculating similarity of the first feature quantity of each channel between the channels; selecting channels having high similarity; separating signals using the input signals of the selected channels; inputting the input signals of the channels having low similarity and the signals after the signal separation; and detecting a voice section of each speaking person or each channel. | 02-23-2012 |
20120089397 | LANGUAGE MODEL GENERATING DEVICE, METHOD THEREOF, AND RECORDING MEDIUM STORING PROGRAM THEREOF - A text in a corpus including a set of world wide web (web) pages is analyzed. At least one word appropriate for a document type set according to a voice recognition target is extracted based on an analysis result. A word set is generated from the extracted at least one word. A retrieval engine is caused to perform a retrieval process using the generated word set as a retrieval query of the retrieval engine on the Internet, and a link to a web page from the retrieval result is acquired. A language model for voice recognition is generated from the acquired web page. | 04-12-2012 |
20140343926 | LANGUAGE MODEL GENERATING DEVICE, METHOD THEREOF, AND RECORDING MEDIUM STORING PROGRAM THEREOF - A text in a corpus including a set of world wide web (web) pages is analyzed. At least one word appropriate for a document type set according to a voice recognition target is extracted based on an analysis result. A word set is generated from the extracted at least one word. A retrieval engine is caused to perform a retrieval process using the generated word set as a retrieval query of the retrieval engine on the Internet, and a link to a web page from the retrieval result is acquired. A language model for voice recognition is generated from the acquired web page. | 11-20-2014 |
Patent application number | Description | Published |
20110187490 | CONTROL NETWORK SYSTEM - A control network system may control a control target by using control data. The control network system may include a wireless field device that transmits the control data through a wireless communication, a relay apparatus that relays the control data from the wireless field device, the relay apparatus including a storage unit that stores identification data of the wireless field device, the storage unit storing a flag associated with the identification data, the flag showing a progress state of commissioning of the wireless field device, and a host system that receives the control data from the wireless field device through the relay apparatus, the host system including a control unit that discontinues operation of controlling the control target when the flag is in a nonsteady state. | 08-04-2011 |
20110213900 | FIELD COMMUNICATION MANAGEMENT APPARATUS - There is provided a field communication management apparatus capable of setting configuration information segments with certainty without causing a burden, and an inexpedience at the time of an operation for setting. A reception unit receives download information. A setting unit sets individual information segments contained in download information received by the reception unit in a corresponding field device and a gateway itself. A communication limiting unit prohibits communication between the field device and host devices for a period before the individual information segments are set in the field device and the gateway itself, respectively, by the setting unit. | 09-01-2011 |
20110228725 | FIELD COMMUNICATION SYSTEM AND FIELD COMMUNICATION METHOD - A field communication system may perform wireless communication with field devices. The field communication system may include a connection allowing unit that determines whether or not to allow a connection to the field device by referring a field device list, the field device list listing tag names related to the field devices, an address issuance unit that automatically issues a communication address for the field device if the connection allowing unit allows the connection with the field device, an address management unit that establishes correspondences between the communication addresses and the tag names of the field devices by using the field device list, and a communication unit that transmits data to the field device designated by the tag name, the communication unit receiving the data transmitted from the field device, the data being used to control the field device designated by the tag name. | 09-22-2011 |
20110258567 | REGISTER CONFIGURATOR AND REGISTER CONFIGURATION METHOD - A register configurator may include a display screen, a data display unit that displays data related to field devices on the display screen, a register space display unit that graphically displays a register space of a register on the display screen, a manipulation reception unit that receives a manipulation for allocating each of the data, which has been displayed by the data display unit, to an area in the register space, which has been displayed by the register space display unit, the manipulation being performed on the display screen by a user, and a correspondence establishing unit that establishes a correspondence between the data and the area, based on the manipulation that has been received by the manipulation reception unit. | 10-20-2011 |
20110261757 | FIELD COMMUNICATION SYSTEM AND FIELD COMMUNICATION METHOD - A field communication system may include a communication device that transmits and receives data to and from a field device through a wireless communication, the communication device communicating with the field device if field device data corresponds to communication device data, a field device setting unit that generates the field device data related to a device tag of the field device, the field device setting unit setting the field device data to the field device, a storage unit that stores the field device data, and a communication device setting unit that extracts the field device data stored in the storage unit by using the device tag as a key, the communication device setting unit setting the field device data to the communication device as the communication device data. | 10-27-2011 |
20110313549 | FIELD COMMUNICATION SYSTEM - A field communication system receives data from a field device through a communication network and maps the data onto a register to update the data. The field communication system includes a detection module configured to detect a state of communication with the field device through the communication network, and a writing module configured to write the communication state detected by the detection module in the register as information added to the data. | 12-22-2011 |
20120063330 | WIRELESS NETWORK PATH SETTING APPARATUS AND METHOD - A wireless network path setting apparatus includes a receiving module configured to receive input of wireless network paths, an investigating module configured to investigate a communication environment and status of each of routes constituting the wireless network paths that have been input through the receiving module, and a registering module configured to register the wireless network paths that have been input through the receiving module as network paths to be used in a field wireless system if the communication environment and status of each route investigated by the investigating module is appropriate. | 03-15-2012 |
20130019040 | FIELD COMMUNICATION SYSTEMAANM Sueki; MasanoriAACI TokyoAACO JPAAGP Sueki; Masanori Tokyo JPAANM Emori; ToshiyukiAACI TokyoAACO JPAAGP Emori; Toshiyuki Tokyo JPAANM Mizushima; FuyukiAACI TokyoAACO JPAAGP Mizushima; Fuyuki Tokyo JP - A field communication system includes a field device as a slave device, having a first slave communication port and a second slave communication port, a communication module as a master device, having first master communication port and a second master communication port, configured to execute communication with the field device, a first communication line configured to connect the first slave communication port with the first master communication port, and
| 01-17-2013 |
20150160630 | PLANT CONTROL SYSTEM, CONTROLLER, MANAGER, AND PLANT INFORMATION PROCESSING METHOD - A plant control system includes a controller configured to control a plant by using process data, the controller transmitting the process data to a field device and receiving the process data from the field device, the controller obtaining field information indicating a state of the field device from the field device, the field device being installed in the plant, and the field device performing at least one of a measurement and a manipulation which are necessary for the control of the plant, and a manager configured to manage a state of the plant by collecting the field information from the field device, wherein at least one of the controller and the manager creates information indicating a normality of the plant by using the field information. | 06-11-2015 |
Patent application number | Description | Published |
20090092400 | LIGHT SOURCE IN OPTICAL TRANSMISSION SYSTEM, WAVEFORM SHAPER, OPTICAL PULSE TRAIN GENERATOR AND OPTICAL REPRODUCTION SYSTEM - The present invention provides a pulse train generator comprising: a dual-frequency signal light source for generating a dual-frequency signal; a soliton shaper for soliton-shaping output light from the dual-frequency signal light source; and an adiabatic soliton compressor for performing adiabatic soliton compression on output light from the soliton shaper, and also provides a waveform shaper used in this pulse train generator, including a plurality of highly nonlinear optical transmission lines and a plurality of low-nonlinearity optical transmission lines which has a nonlinearity coefficient lower than that of the plurality of highly nonlinear optical transmission lines and which has a second-order dispersion value of which an absolute value is different from that of the plurality of highly nonlinear optical transmission lines. Further, the present invention provides a light source comprising a plurality of continuous light sources of which at least one oscillates in a multimode; a multiplexer for multiplexing output light from the continuous light sources; and a nonlinear phenomenon producer for producing a nonlinear phenomenon on output light from the multiplexer so as to suppress SBS (Stimulated Brillouin Scattering). | 04-09-2009 |
20100067099 | RAMAN AMPLIFIER, OPTICAL REPEATER, AND RAMAN AMPLIFICATION METHOD - A Raman amplifier according to the present invention comprises a plurality of pumping means using semiconductor lasers of Fabry-Perot, DFB, or DBR type or MOPAs, and pumping lights outputted from the pumping means have different central wavelengths, and interval between the adjacent central wavelength is greater than 6 nm and smaller than 35 nm. An optical repeater according to the present invention comprises the above-mentioned Raman amplifier and adapted to compensate loss in an optical fiber transmission line by the Raman amplifier. In a Raman amplification method according to the present invention, the shorter the central wavelength of the pumping light the higher light power of said pumping light. In the Raman amplifier according to the present invention, when a certain pumping wavelength is defined as a first channel, and second to n-th channels are defined to be arranged with an interval of about 1 THz toward a longer wavelength side, the pumping lights having wavelengths corresponding to the first to n-th channels are multiplexed, and an pumping light having a wavelength spaced apart from the n-th channel by 2 THz or more toward the longer wavelength side is combined with the multiplexed light, thereby forming the pumping light source. The pumping lights having wavelengths corresponding to the channels other than (n-1)-th and (n-2)-th channels may be multiplexed, thereby forming the pumping light source. The pumping lights having wavelengths corresponding to the channels other than (n-2)-th and (n-3)-th channels may be multiplexed, thereby forming the pumping light source. | 03-18-2010 |
20100247055 | OPTICAL FIBER HOLDING APPARATUS - An optical fiber holding apparatus in accordance with the present invention is characterized in that the same comprises a surface in order to hold an optical fiber which is to be a state of which is rolled up so as not to overlap with each other, wherein at least the surface is formed of a thermo conductive molding body which has a thermal conductivity to be higher than or equal to 0.5 W/mK, and which has an Asker C hardness to be between twenty and fifty. Or, the same comprises a peripheral surface in order to roll up and hold an optical fiber, wherein at least the peripheral surface is formed of a thermo conductive molding body which has the thermal conductivity to be higher than or equal to 0.5 W/mK, and which has the Asker C hardness to be between twenty and fifty. Moreover, it is desirable for the thermo conductive molding body to have a compressive strength of which a peak value is between ten and thirty N/cm | 09-30-2010 |
20100265971 | CASCADE RAMAN LASER - The invention provides a cascade Raman laser including a pumping laser light source that generates pumping light, a cascade Raman resonator having an input-side optical reflector that receives the pumping light and selectively reflects light of each wavelength corresponding to a n-th Stokes ray (n is an integer more than 1) of Raman scattering to the pumping light, a Raman optical fiber that is connected to the input-side optical reflector and generates Raman scattering light at least by the pumping light and an output-side optical reflector that is connected to the Raman optical fiber and selectively reflects light of each wavelength corresponding to the n-th Stokes ray and a blocking device interposed between the pumping laser light source and the cascade Raman resonator and blocks the first Stokes ray generated within the cascade Raman resonator from entering the pumping laser light source side. | 10-21-2010 |
20110141553 | RAMAN AMPLIFIER, OPTICAL REPEATER, AND RAMAN AMPLIFICATION METHOD - A Raman amplifier according to the present invention comprises a plurality of pumping means using semiconductor lasers of Fabry-Perot, DFB, or DBR type or MOPAs, and pumping lights outputted from the pumping means have different central wavelengths, and interval between the adjacent central wavelength is greater than 6 nm and smaller than 35 nm. An optical repeater according to the present invention comprises the above-mentioned Raman amplifier and adapted to compensate loss in an optical fiber transmission line by the Raman amplifier. In a Raman amplification method according to the present invention, the shorter the central wavelength of the pumping light the higher light power of said pumping light. In the Raman amplifier according to the present invention, when a certain pumping wavelength is defined as a first channel, and second to n-th channels are defined to be arranged with an interval of about 1 THz toward a longer wavelength side, the pumping lights having wavelengths corresponding to the first to n-th channels are multiplexed, and an pumping light having a wavelength spaced apart from the n-th channel by 2 THz or more toward the longer wavelength side is combined with the multiplexed light, thereby forming the pumping light source. The pumping lights having wavelengths corresponding to the channels other than (n-1)-th and (n-2)-th channels may be multiplexed, thereby forming the pumping light source. The pumping lights having wavelengths corresponding to the channels other than (n-2)-th and (n-3)-th channels may be multiplexed, thereby forming the pumping light source. | 06-16-2011 |
20130259069 | FIBER LASER APPARATUS AND METHOD OF DETECTING FAILURE OF FIBER LASER APPARATUS - A fiber laser apparatus in which pump light is introduced into an optical fiber to generate laser light includes a detecting section that detects signal light leaking out from a core of the optical fiber as leakage signal light, a determining section that determines that, in a case where there is a decrease in an intensity of the leakage signal light detected in the detecting section, a failure of the fiber has occurred, and a stopping section that stops, in a case where the determining section has determined that a failure of the fiber has occurred, the introduction of the pump light into the optical fiber. The detecting section detects the leakage signal light leaking out of a High Reflectivity FBG that is provided on a side opposite to an output side of the laser light. | 10-03-2013 |
20130286468 | RAMAN AMPLIFIER, OPTICAL REPEATER, AND RAMAN AMPLIFICATION METHOD - A Raman amplifier using semiconductor lasers of Fabry-Perot, DFB, or DBR type or MOPAs, to output pumping lights having different central wavelengths, an interval between adjacent central wavelengths greater than 6 nm and smaller than 35 nm. An optical repeater is adapted to compensate loss in an optical fibre transmission line by the Raman amplifier. A Raman amplification method wherein the shorter the central wavelength of the pumping light, the higher light power of the pumping light. In the Raman amplifier, a certain pumping 1 wavelength being a first channel, and second to n-th channels are arranged with an interval of about 1 THz toward a longer wavelength side, pumping lights having wavelengths corresponding to the first to n-th channels are multiplexed, and pumping light having a wavelength spaced apart from the n-th channel by 2 THz or more toward the longer wavelength side is combined with the multiplexed light, thereby forming the pumping light source. | 10-31-2013 |
20130299474 | Fiber Laser Apparatus and Method of Aligning Laser Light Irradiation Position - A fiber laser apparatus that generates invisible laser light using an amplification optical fiber having a single-mode core and outputs the invisible laser light via an output optical fiber is provided. The fiber laser apparatus includes a visible laser light source that generates visible laser light, an introducing section that introduces the visible laser light generated by the visible laser light source into a core of one of the amplification optical fiber and the output optical fiber, and a drive unit that drives, in a case of performing alignment of an irradiation position of the invisible laser light with respect to a workpiece, the visible laser light source and emits the visible laser light via the core of the output optical fiber. | 11-14-2013 |