| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 372032000 | Frequency | 45 |
| 20080225911 | WAVELENGTH DETECTOR, WAVELENGTH STABILIZATION LASER DEVICE, AND IMAGE DISPLAY DEVICE - A wavelength detector capable of distinguishing between the changes of a transverse mode and of a longitudinal mode of a laser light and thus detecting the change of the wavelength of the laser light with high accuracy is provided. In a wavelength detector | 09-18-2008 |
| 20080285606 | METHOD AND APPARATUS FOR OPTICAL FREQUENCY COMB GENERATION USING A MONOLITHIC MICRO-RESONATOR - An optical frequency comb generator includes a laser device arranged for generating input laser light having a predetermined input light frequency, a dielectric micro-resonator having a cavity exhibiting a third order nonlinearity, so that the micro-resonator is capable of optical parametric generation providing parametrically generated light, and a waveguide optically coupled to the micro-resonator, the waveguide being arranged for in-coupling the input laser light into the micro-resonator and out-coupling the parametrically generated light out of the micro-resonator, wherein the laser device, the waveguide and the micro-resonator being arranged for resonantly in-coupling the laser input light to a mode of the micro-resonator with a minimum power level so that an optical field inside the cavity exceeds a predetermined cascaded parametric oscillation threshold at which the parametrically generated light includes frequencies of frequency sidebands of the input light frequency and of the sidebands thereof. | 11-20-2008 |
| 20090028197 | FIXED WAVELENGTH MID INFRARED LASER SOURCE WITH AN EXTERNAL CAVITY - A MIR laser source that produces a fixed frequency output beam that is within the MIR range includes a QC gain media, and a wavelength dependent (“WD') feedback assembly that is spaced apart from the QC gain media and that cooperates with the QC gain media to form an external cavity. The WD feedback assembly may be used to precisely tune and control a lasing wavelength of the external cavity, and the position of the WD feedback assembly relative to the QC gain media may be fixed to maintain the precise lasing wavelength of the external cavity. With this design, each MIR laser source can be individually tuned to achieve the desired fixed frequency output beam that is within the MIR range. | 01-29-2009 |
| 20090116520 | FREQUENCY-STABILIZED LASER DEVICE, LASER FREQUENCY STABILIZING METHOD, AND LASER FREQUENCY STABILIZING PROGRAM - A frequency-stabilized laser device comprises an actuator arranged to vary the cavity length; an actuator driver arranged to apply a voltage to the actuator for changing displacement; a temperature detector arranged to detect the temperature on the cavity; a temperature adjuster arranged to heat or cool the cavity; a cavity temperature controller arranged to control the temperature adjuster based on a previously given instruction temperature and the temperature on the cavity detected at the temperature detector; and an instruction temperature corrector arranged to correct the instruction temperature given to the cavity temperature controller such that the voltage applied to the actuator remains almost constant. | 05-07-2009 |
| 20090180501 | LASER TUNING - A method of controlling a laser is provided for generating an optical output. The method includes the step of making a change to an electrical input to the laser so as to move the optical output of the laser towards a target frequency, and also includes the step of changing the temperature of the laser in relation to the change in the electrical input or the movement of the optical output. The method further includes the step of making further changes to the electrical input as the temperature of the laser is changed so as to maintain the optical output of the laser at the target frequency. | 07-16-2009 |
| 20090180502 | Injection Locking Type Light Source Which of The Noise Can be Minimized - An injection seed of an injection locking type light source includes a broadband light source, a seed circulator receiving and transmitting a light from the light source to a seed optical filter passing only a desired wavelength band among the light beams from the light source and passing through the seed circulator, and an injection light source receiving a light beam of a specific wavelength band passing through the seed optical filter and outputting the wavelength-locked light beam without modulation to the seed optical filter at a predetermined power. The seed optical filter receives and outputs the wavelength-locked light beam from the injection light source to the seed circulator, and the seed circulator receives and outputs the wavelength-locked light beam as a seed beam. Since noise signal of a seed beam is small, noise signal of a final transmitting beam is also small and preferable for the high speed communication. | 07-16-2009 |
| 20090232172 | LASER FREQUENCY STABILIZING DEVICE, METHOD AND PROGRAM - A laser frequency stabilizing device comprises a laser light producer operative to produce and emit a laser light containing a first and a second longitudinal mode light having different wavelengths; a spectrometer operative to spectrally decompose the laser light into the first longitudinal mode light and the second longitudinal mode light; a first detector operative to detect the light output signal from a absorption cell; a second and third detector operative to detect the signal intensity of the first and second longitudinal mode light; an actuator operative to change the resonant cavity length; a first drive controller operative to detect the saturated absorption signal from the light output signal detected at the first detector and control driving the actuator based on the saturated absorption signal; a second drive controller operative to control driving the actuator such that the signal intensity of the first longitudinal mode light detected at the second detector and the signal intensity of the second longitudinal mode light detected at the third detector have a ratio of a certain value; and a switcher operative to switch the control of the detector between the control by the first drive controller and the control by the second drive controller. | 09-17-2009 |
| 20090296760 | Optical Pumping Apparatus and Method to Reduce AC Stark Shift in Atomic Frequency Standards - An optical pumping atomic frequency apparatus for producing an oscillation signal with a stable frequency comprises a cell containing atomic particles of a quantum absorber material whose atomic particles have two clock transition states and first and second excited states. A static bias magnetic field is provided at the cell. A first electromagnetic (EM) field is provided to the cell, to excite transitions between at least one of the clock transition states and at least one of the first and second excited states due to absorption of the first EM field by the atomic particles in the at least one of the clock transition states, in order to alter the relative population of the atomic particles. A second EM field is applied to the cell, to induce transitions between the two clock transition states, so that the absorption of the first EM field by the atomic particles increases. Absorption of the first EM field is detected. The frequency spectrum of the first and second EM fields are controlled; so that the frequency of the output oscillating signal is related to the clock transition frequency. The interactions between the atomic particles and the first EM field cause a light shift as a function of the intensity and the frequency of the first EM field, the light shift having a characteristic curve. The light shift has an absolute value which is related to the frequency and polarization of the first EM field, and the frequency and polarization are chosen to reduce the absolute value of the light shift. The light shift curve has a slope at the frequency which corresponds with an energy difference between the at least one of the clock states and the at least one of the first and second excited states, the slope thereat related to the chemical composition and partial pressure of the buffer gas in the cell. The composition and pressure of the buffer gas reduce the absolute value of the slope of the light shift curve of the clock transition frequency to approximately zero. | 12-03-2009 |
| 20090310635 | WAVELENGTH LOCKER AND LASER PACKAGE INCLUDING SAME - A wavelength locker may include a first optical detector configured to detect light, wherein the first optical detector is at least partially transparent to the light. The wavelength locker may further include an optical interferometer optically coupled to the first optical detector and to a second optical detector. The optical interferometer is configured to selectively filter the light that passes through the first optical detector and the second optical detector detects the filtered light. An optical module or package may include the wavelength locker coupled to a laser for locking an emission wavelength of the laser. | 12-17-2009 |
| 20090316739 | OPTICAL WAVELENGTH CONTROL CIRCUIT AND METHOD - In an optical wavelength control circuit, an activation control circuit outputs an optical output setting signal to a laser unit to set its optical output, and simultaneously outputs a temperature setting signal and a wavelength setting signal. A temperature error detection circuit outputs a temperature error signal. A wavelength error detection circuit outputs a wavelength error signal. A control switching circuit receives the temperature error signal and the wavelength error signal, selectively outputs the temperature error signal as a control error signal in the activation operation, and selectively outputs the wavelength error signal as the control error signal in a steady-state operation after the activation operation. A steady-state error removing circuit removes a steady-state error contained in the control error signal and outputs a temperature controller control signal. A temperature controller driving circuit drives a temperature controller of the laser unit in accordance with the temperature controller control signal. | 12-24-2009 |
| 20100008388 | INTERNAL RESONATOR TYPE SHG LIGHT SOURCE - An internal resonator type SHG light source includes a pump light source which emits a pump light; a solid-state laser which absorbs the pump light and which emits a fundamental wave; an output mirror provided so as to face the solid-state laser, which forms a resonator together with the solid-state laser; a wavelength conversion element provided in the resonator, which converts the fundamental wave into a harmonic wave; a detector which detects a temperature of the wavelength conversion element; and a rotating unit which changes an incident angle of the fundamental wave on the wavelength conversion element by rotating the wavelength conversion element, wherein the rotating unit rotates the wavelength conversion element according to the temperature of the wavelength conversion element as detected by the detector. | 01-14-2010 |
| 20100111122 | HIGH OUTPUT, MID INFRARED LASER SOURCE ASSEMBLY - A laser source assembly ( | 05-06-2010 |
| 20100177795 | APPARATUS AND METHOD FOR STABILIZING FREQUENCY OF LASER - A frequency-stabilized laser apparatus and a method for stabilizing the frequency of a laser are disclosed. A semiconductor laser emits a beam. An external reflector has a resonance frequency and feeds back the emitted beam to the semiconductor laser if the frequency of the emitted beam is equal to the resonance frequency. An interference signal generator generates an interference signal for detecting the wavelength of the emitted beam and a controller detects the wavelength of the beam from the generated interference signal. According to the frequency-stabilized laser apparatus and the method for stabilizing the frequency of the laser, it is possible to stabilize the frequency of the beam emitted from the semiconductor laser and output the beam having the stable frequency for a long period of time. | 07-15-2010 |
| 20100284431 | OPTICAL PULSE TRAIN GENERATOR - An optical pulse train generator | 11-11-2010 |
| 20100303111 | PAIR OF OPTICALLY LOCKED SEMICONDUCTOR NARROW LINEWIDTH EXTERNAL CAVITY LASERS WITH FREQUENCY OFFSET TUNING - An optical phase lock loop (OPLL) system is disclosed that includes a master external cavity laser (ECL), and a substantially identical slave ECL. The master and slave ECLs are fabricated using a planar semiconductor device with waveguide-integrated planar Bragg gratings (PBG). Both the master and slave ECLs have a narrow linewidth and a low frequency-noise. Each of the ECLs has their own controller-modulator circuits for thermal tuning or electrical tuning via direct modulation. A laser-select-logic (LSL) module receives and processes a filtered phase error signal from a loop filter coupled to an electronic PLL device, and directs the processed phase error signal to one or both of the master and slave controller-modulators according to a logical determination of a required mode of operation of the OPLL system in order to achieve a stable and identical phase performance of the master and the slave ECLs. The required mode of operation is chosen from a locking mode, a prediction mode, a tracking mode, and a searching mode. | 12-02-2010 |
| 20110032961 | MONOLITHIC FOLDED F-P CAVITY AND SEMICONDUCTOR LASER USING THE SAME - This invention relates to a monolithic folded F-P cavity used for semiconductor laser, which is composed of a monolithic optical element. The monolithic optical element is made of the material having low propagation loss for a certain spectrum range. Light entering through an input/output coupling surface of the monolithic optical element is reflected several times between the input/output coupling surface and at least two high reflection surfaces within the monolithic optical element, and then at least one part of the light exits through the input/output coupling surface along the path which is collinear with the incident light but in an opposite direction. By means of integrating reflecting and coupling parts of the folded F-P cavity within a single monolithic optical material, this invention greatly improves the reliability of the F-P cavity, and has other advantages, such as insensitive to outside interferences, smaller size, simpler structure and easy usage. A semiconductor laser using the monolithic folded F-P cavity is also provided. | 02-10-2011 |
| 20110051757 | CONNECTION UNIT AND LASER OSCILLATING APPARATUS HAVING THE SAME - A laser oscillation device includes an oscillation unit oscillating a laser, a shutter unit covering the laser, and a connection unit covering the laser, connecting the oscillation unit and the shutter unit and including a first connection part supported by the oscillation unit and a second connection part supported by the shutter unit. The first and second connection parts are separated from each other, and one of the first and second connection parts covers at least a portion of the other one of the first and second connection parts. | 03-03-2011 |
| 20110075692 | ATOMIC FREQUENCY ACQUISITION DEVICE BASED ON SELF-MIXING INTERFERENCE - The present invention relates to an atomic frequency acquisition device comprising a gas cell ( | 03-31-2011 |
| 20110116522 | ADVANCED LASER WAVELENGTH CONTROL - Laser light wavelength control is provided by periodically predicting a next position of a light controlling prism using a model of the prism's motion characteristics. The prediction is then updated if a measurement of laser output wavelength is obtained. However, because the predictions are made without waiting for a measurement, they can be made more frequently than the laser firing repetition rate and the prism can be repositioned at discrete points in time which can occur more frequently than the laser firing events. This also reduces performance degradation which may be caused by being one pulse behind a laser measurement and the resultant laser control signal being applied. | 05-19-2011 |
| 20110122904 | Methods And Systems For Frequency Stabilisation Of Multiple Lasers - A system and method for stabilising a plurality of output frequencies (wavelengths) of a plurality of lasers ( | 05-26-2011 |
| 20110164633 | WAVELENGTH-CONTROLLED SEMICONDUCTOR LASER DEVICE - A semiconductor laser device comprising a laser diode with an integrated photodiode, wherein one of the components of the laser diode with the integrated photodiode is also used for heating the laser diode. A simpler design of a wavelength-controlled semiconductor laser is thus obtained. | 07-07-2011 |
| 20110194577 | Systems And Methods For Stabilizing Laser Frequency Based On An Isoclinic Point In The Absorption Spectrum Of A Gas - Systems and methods for stabilizing laser frequency based on an isoclinic point of an atomic or molecular medium are provided herein. A system may include: a transmission cell containing a gas and configured to transmit light from the laser, the gas having an absorption spectrum with an isoclinic point; a photodiode generating an output based on an amplitude of transmitted laser light; and circuitry configured to tune the frequency of the laser to the isoclinic point of the absorption spectrum based on the output. The absorption spectrum may have first and second overlapping peaks respectively corresponding to first and second transitions of the gas, the isoclinic point being a saddle point between the first and second peaks. The first and second peaks may have substantially equal amplitude as one another and/or may broaden substantially equally as each other as a function of a physical parameter of the gas. | 08-11-2011 |
| 20120008652 | OPTICAL FREQUENCY STABILIZATION SYSTEM AND METHOD - One embodiment of the invention includes an optical system. The optical system includes an optical cavity comprising a plurality of reflectors. The optical system also includes optics configured to provide a first optical signal and a second optical signal into respective inputs of the optical cavity to be substantially concurrently resonated within the optical cavity. The first and second optical signals can have distinct wavelengths. | 01-12-2012 |
| 20120008653 | Laser System with Dynamically Stabilized Transient Wavelength and Method of Operating Same - A method and laser system for dynamically adjusting a transient wavelength of light pulses emitted by a laser includes sequential processing of transient photocurrent curves which are generated after interaction between each light pulse and wavelength-selective medium which is configured with a known spectral peak line selected in the range of the transient wavelength. The method further includes continuously processing parameters of sequentially generated curves until the processed parameters are repeatedly uniform. | 01-12-2012 |
| 20120027035 | HIGH-POWER, PHASE-LOCKED, LASER ARRAYS - High-power, phased-locked, laser arrays as disclosed herein utilize a system of optical elements that may be external to the laser oscillator array. Such an external optical system may achieve mutually coherent operation of all the emitters in a laser array, and coherent combination of the output of all the lasers in the array into a single beam. Such an “external gain harness” system may include: an optical lens/mirror system that mixes the output of all the emitters in the array; a holographic optical element that combines the output of all the lasers in the array, and an output coupler that selects a single path for the combined output and also selects a common operating frequency for all the coupled gain regions. | 02-02-2012 |
| 20120039348 | SYSTEMS AND METHODS FOR STABILIZING LASER FREQUENCY BASED ON AN ISOCLINIC POINT IN THE ABSORPTION SPECTRUM OF A GAS - Systems and methods for stabilizing laser frequency based on an isoclinic point of an atomic or molecular medium are provided herein. A system may include: a transmission cell containing a gas and configured to transmit light from the laser, the gas having an absorption spectrum with an isoclinic point; a photodiode generating an output based on an amplitude of transmitted laser light; and circuitry configured to tune the frequency of the laser to the isoclinic point of the absorption spectrum based on the output. The absorption spectrum may have first and second overlapping peaks respectively corresponding to first and second transitions of the gas, the isoclinic point being a saddle point between the first and second peaks. The first and second peaks may have substantially equal amplitude as one another and/or may broaden substantially equally as each other as a function of a physical parameter of the gas. | 02-16-2012 |
| 20120063477 | LASER LIGHT SOURCE APPARATUS - Angle adjustment of a wavelength conversion element after assembly is eliminated to achieve a reduction in production cost with a simplified structure. An element holder provided on a base that supports the wavelength conversion element is provided with a mounting reference surface that positions the wavelength conversion element in parallel with an optical axis. The wavelength conversion element has a substantially parallelepiped shape. A bottom surface, which is one of the four surfaces adjacent to an incident surface and an output surface, is in contact with the mounting reference surface, such that a depth direction of inverted polarization regions is substantially orthogonal to the optical axis and the incident surface and the output surface are tilted at a predetermined tilt angle relative to a flat surface orthogonal to the optical axis. | 03-15-2012 |
| 20120155500 | REPETITION FREQUENCY CONTROL DEVICE - A repetition frequency control device includes a slave photoelectric conversion unit which converts a slave laser light pulse into a slave electrical signal, a master photoelectric conversion unit which converts a master laser light pulse into a master electrical signal, a frequency change unit which changes the repetition frequency of the master electric signal by a predetermined value, a phase comparator which detects a phase difference between the slave electric signal and the output from the frequency change unit, and a loop filter which removes a high frequency component of an output from the phase comparator, where the repetition frequency of the master laser does not undergo control based on one or both of the master electric signal and the slave electric signal. | 06-21-2012 |
| 20120163404 | REPETITION FREQUENCY CONTROL DEVICE - According to the repetition frequency control device, a master laser outputs a master laser light pulse the repetition frequency of which is controlled to a predetermined value. A slave laser outputs a slave laser light pulse. A reference comparator compares a voltage of a reference electric signal the repetition frequency of which is the predetermined value and a predetermined voltage with each other, thereby outputting a result thereof. A measurement comparator compares a voltage based on a light intensity of the slave laser light pulse and the predetermined voltage with each other, thereby outputting a result thereof. A phase difference detector detects a phase difference between the output from the reference comparator and the output from the measurement comparator. A loop filter removes a high-frequency component of an output from the phase difference detector. | 06-28-2012 |
| 20120250712 | DIODE LASER - A diode laser is provided with wavelength stabilization and vertical collimation of the emitted radiation, which allows a small distance of the volume Bragg grating from the emitting surface, a small vertical diameter of the collimated beam and also compensation for manufacturing tolerances affecting the shape of the grating and the lens. The diode laser comprises an external frequency-selective element for wavelength stabilization of the laser radiation, wherein the external frequency-selective element comprises an entry surface facing the exit facet and an exit surface facing away from the exit facet and is designed as a volume Bragg grating; and wherein the external frequency-selective element is designed in such a manner that the divergence of the radiation emitting from the exit facet is reduced during passage through the external frequency-selective element. | 10-04-2012 |
| 20130077644 | METHOD FOR DETERMINING STABILIZATION OF LIGHT OUTPUT SIGNAL AND LASER FREQUENCY STABILIZING DEVICE - A method for determining stabilization of a light output signal employed by a laser frequency stabilizing device which irradiates laser light on an absorption cell to obtain the light output signal and, based on a saturated absorption line contained in the light output signal, changes a resonator length to stabilize an oscillation frequency of the laser light to a specific saturated absorption line. The laser frequency stabilizing device includes a conversion mechanism converting the laser light that passes through the absorption cell into the light output signal, an actuator changing the resonator length, and a control mechanism controlling operation of the actuator. The method for determining stabilization includes a signal analysis step analyzing the light output signal and a stabilization determination step determining whether the light output signal is stabilized based on an analysis result from the signal analysis step, executed by the control mechanism. | 03-28-2013 |
| 20130077645 | High-Power, Phase-Locked, Laser Arrays - High-power, phased-locked, laser arrays as disclosed herein utilize a system of optical elements that may be external to the laser oscillator array. Such an external optical system may achieve mutually coherent operation of all the emitters in a laser array, and coherent combination of the output of all the lasers in the array into a single beam. Such an “external gain harness” system may include: an optical lens/mirror system that mixes the output of all the emitters in the array; a holographic optical element that combines the output of all the lasers in the array, and an output coupler that selects a single path for the combined output and also selects a common operating frequency for all the coupled gain regions. | 03-28-2013 |
| 20130195131 | CHEMICAL DETECTION AND LASER WAVELENGTH STABILIZATION EMPLOYING SPECTROSCOPIC ABSORPTION VIA LASER COMPLIANCE VOLTAGE SENSING - Systems and methods are disclosed that provide a direct indication of the presence and concentration of an analyte within the external cavity of a laser device that employ the compliance voltage across the laser device. The systems can provide stabilization of the laser wavelength. The systems and methods can obviate the need for an external optical detector, an external gas cell, or other sensing region and reduce the complexity and size of the sensing configuration. | 08-01-2013 |
| 20130195132 | METHOD FOR DETERMINING SATURATED ABSORPTION LINES AND LASER FREQUENCY STABILIZING DEVICE - A method for determining saturated absorption lines includes defining first and second threshold values based on an output value of a light output signal. The first and second threshold values are in a magnitude relationship. An output value of a second-order differential signal of the light output signal is compared with the first and second threshold values. A determination is made as to whether the second-order differential signal following a change in a resonator length has an output waveform that displays a behavior in which the output waveform changes from less than the second threshold value to be equal to or greater than the first threshold value, and then changes to be less than the second threshold value. Based on a result of the determination by the waveform determination, a determination is made as to whether the output waveform of the second-order differential signal is the saturated absorption line. | 08-01-2013 |
| 20140044142 | LASER WITH TRANSMISSION AND REFLECTION MODE FEEDBACK CONTROL - One embodiment is directed towards a stabilized laser including a laser to produce light at a frequency and a resonator coupled to the laser such that the light from the laser circulates therethrough. The laser also includes Pound-Drever-Hall (PDH) feedback electronics configured to adjust the frequency of the light from the laser to reduce phase noise in response to light sensed at the reflection port of the resonator and transmission port feedback electronics configured to adjust the frequency of the light from the laser toward resonance of the resonator at the transmission port in response to the light sensed at the transmission port of the resonator, wherein the transmission port feedback electronics adjust the frequency at a rate at least ten times slower than the PDH feedback electronics. | 02-13-2014 |
| 20140192830 | WAVELENGTH LOCKING OF A LASER DEVICE - There is discussed an optical system comprising a laser device that outputs a divergent light beam. A first portion of the divergent light beam, including a central portion, passes through an etalon device, which acts as a wavelength discriminator, and then the central portion is incident on a first monitor photodiode, which generates a wavelength-dependent detection signal. A second portion of the divergent light beam is incident on a second monitor photodetector, without passing through the etalon device, to generate a wavelength-independent detection signal. A processor processes the wavelength-dependent detection signal and the wavelength-independent detection signal to determine a control signal for controlling the wavelength of the laser device. By accurately positioning a photodetector at the central fringe of the divergent light beam following transmission through the etalon device, a compact and cost-effective wavelength locking arrangement is provided. | 07-10-2014 |
| 20140321487 | PRECISION PHOTONIC OSCILLATOR AND METHOD FOR GENERATING AN ULTRA-STABLE FREQUENCY REFERENCE USING A TWO-PHOTON RUBIDIUM TRANSITION - Embodiments of an ultra-stable frequency reference generating system and methods for generating an ultra-stable frequency reference using a two-photon Rubidium transition are generally described herein. In some embodiments, a cavity-stabilized reference laser comprising a laser source is locked to a stabilized cavity. A Rubidium cell is interrogated by a stabilized laser output to cause at least a two-photon Rubidium transition and a detector may detect fluorescence resulting from spontaneous decay of the upper state Rubidium transition. The output of the detector is provided at a wavelength of the fluorescence to lock the cavity-stabilized reference laser to generate a stabilized laser output. A frequency comb stabilizer may be locked to the stabilized laser output to generate a super-continuum of optical wavelengths for use in generating an ultra-stable frequency reference. | 10-30-2014 |
| 20150092801 | LASER SYSTEM WITH WAVELENGTH CONVERTER - A method of controlling beam quality and stability of a laser apparatus, the laser apparatus comprising, a diode laser ( | 04-02-2015 |
| 20150131686 | Wavelength Stabilized Diode Laser - A hybrid external cavity laser and a method for configuring the laser having a stabilized wavelength is disclosed. The laser comprises a semiconductor gain section and a volume Bragg grating, wherein a laser emission from the semiconductor gain section is based on a combination of a reflectivity of a front facet of the semiconductor gain section and a reflectivity of the volume Bragg grating and the reflectivity of the semiconductor gain section and the volume Bragg grating are insufficient by themselves to support the laser emission. The hybrid cavity laser further comprises an etalon that provides further wavelength stability. | 05-14-2015 |
| 20150325978 | MUTUALLY-REFERENCED OPTICAL FREQUENCY COMBS - Embodiments herein provide for an optical frequency reference including a fine optical frequency comb and a coarse optical frequency comb. The fine comb has a first tooth and a frequency spacing (FCS) between teeth that is locked to a fractional or integer multiple of a radio frequency reference. The coarse comb has a second tooth that is locked to the first tooth and a frequency spacing (CCS) between teeth that is locked to an integer multiple of the FCS. An absolute optical frequency of at least one tooth of the coarse optical frequency comb is set. | 11-12-2015 |
| 20150357790 | LASER LIGHT SOURCE DEVICE - A laser diode includes a laser diode emitting light due to an electrical signal; a wavelength conversion plate for shifting the wavelength of the light emitted from the laser diode; a reflecting part for reflecting the light emitted from the laser diode towards the wavelength conversion plate; and a projecting part for emitting, in the forward direction, the light shifted by the wavelength conversion plate. The laser diode can provide a high-power but small-sized laser light source device, and a narrow emission angle can be achieved using the laser diode. | 12-10-2015 |
| 20160181763 | EXTERNAL-CAVITY TYPE LASER WITH BUILT-IN WAVEMETER | 06-23-2016 |
| 20160204570 | WAVELENGTH SELECTIVE EXTERNAL RESONATOR AND BEAM COMBINING SYSTEM FOR DENSE WAVELENGTH BEAM COMBINING LASER | 07-14-2016 |
| 20160254646 | OPTICAL FREQUENCY DIVIDER BASED ON AN ELECTRO-OPTICAL-MODULATOR FREQUENCY COMB | 09-01-2016 |
| 20180026425 | SEMICONDUCTOR LASER OSCILLATOR | 01-25-2018 |
