| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 359337200 | Filtering (e.g., noise) | 21 |
| 20080231945 | Apparatus and Methods for Optical Communication - An optical circuit is disclosed, which may include a semiconductor optical amplifier (SOA); an optical filter operable to filter light emerging from the SOA; and a PIN for converting the light output from the optical filter into an electrical signal, wherein the gain profile of the optical filter is configured to maximize throughout of signal energy within a predetermined wavelength range (in-band), and to impose an insertion loss (L | 09-25-2008 |
| 20090034058 | REDUCED THRESHOLD LASER DEVICE - A laser device including: a first amplifying medium capable of emitting a first output laser beam at the output wavelength λs; and a second amplifying medium capable of emitting a second laser beam of intermediate wavelength λi and capable of being pumped at a pump wavelength λp such that λi is included between λp and λs; wherein a single laser cavity containing said first and second amplifying media, this cavity being closed by two mirrors with maximum reflection at the wavelength λi, and in that there are two distinct laser wavelengths λi and λs which take place in said cavity. | 02-05-2009 |
| 20090086311 | Spectral Filtering Method and Apparatus in Optical Parametric Chirped Pulse Amplification - Method and apparatus embodiments of the invention are directed to mitigating temporal contrast degradation in optical parametric chirped pulse amplification (OPCPA) laser systems. A spectral filter is used in an OPCPA laser system to remove or reduce of out-of-band amplified spontaneous emission (ASE) from an amplified pump pulse and/or the longitudinal modes of a seed laser used to generate the pump pulse, which typically cause detrimental temporal intensity fluctuations in the amplified pump signal. According to an illustrative embodiment, a volume Bragg grating (VBG) filter element is disposed in the pump regenerative amplifier cavity where the pump pulse undergoes multiple passes on the filter element. | 04-02-2009 |
| 20100007943 | Optical amplification system and optical amplification method - An optical amplification system includes a wavelength filter that divides a wavelength multiplexing optical signal into a plurality of wavelength multiplexing optical signals having wider wavelength intervals than wavelength intervals of the wavelength multiplexing optical signal, and a first optical amplifier that performs optical amplification on the plurality of divided wavelength multiplexing optical signals independently of one another. | 01-14-2010 |
| 20100073763 | Adjustable optical signal delay module and method thereof - The present invention relates to an adjustable optical signal delay module, particularly to a module, which adjusts power of an amplified spontaneous emission generated by a semiconductor optical amplifier and reversely feeds the adjusted amplified spontaneous emission back to the semiconductor optical amplifier to vary a group refractive index of the semiconductor optical amplifier and delay the timing of an optical signal, whereby the present invention can replace the pump laser conventionally required by a CPO mechanism. In the present invention, the feedback optical loop comprises a variable optical attenuator, an optical filter, and optical circulators. An user can control the delay timing of optical signals via adjusting optical power in the feedback optical loop. The present invention can decrease the fabrication cost of an optical signal delay module and reduce the volume thereof. | 03-25-2010 |
| 20100091356 | Method and Apparatus for Enhancing Signal-to-Noise Power Ratio in Optical Fiber Amplifiers - The invention discloses an apparatus for enhancing the signal power to ASE power ratio in an optical amplifier including a 1×n input optical switching component, n band-pass filters, and an n×1 output optical switching component, wherein the signal power is allowed to pass through the band-pass filter switched by the 1×n input optical switching component and the n×1 output optical switching component. | 04-15-2010 |
| 20100195193 | OPTICAL PULSE SOURCE DEVICE - An optical pulse source device comprising an optical pulse source ( | 08-05-2010 |
| 20110181943 | Wavelength conversion device and wavelength conversion method - A first wavelength converter of a wavelength-conversion device includes: an optical amplifier amplifying an incident light beam; a first dispersion flat fiber spreading the wavelength spectrum width of the amplified beam; and a first wavelength filter transmitting a predetermined wavelength bandwidth of the first fiber output beam. A center wavelength of the first wavelength converted beam is shifted by Δλ | 07-28-2011 |
| 20120062984 | GENERATING LASER PULSES BASED ON CHIRPED PULSE AMPLIFICATION - Techniques and devices for producing short laser pulses based on chirped pulse amplification. | 03-15-2012 |
| 20120062985 | OPTICAL FIBER AMPLIFYING MODULE - The present invention relates to an optical fiber amplifying module equipped with a structure for stably attaining a high gain even when amplifying light having a low duty cycle. The optical fiber amplifying module comprises at least three amplification optical fibers successively arranged from an input connector to an output collimator. A bandpass filter is arranged between the first- and second-stage amplification optical fibers. Control means having a structure constituted by optically passive components alone or a feedback structure functions so as to render an upper limit to a gain for input light in the first-stage amplification optical fiber, thereby preventing the deterioration in performances such as destruction of the bandpass filter from occurring in optical components positioned on the upstream side of the final-stage amplification optical fiber. | 03-15-2012 |
| 20120075691 | Wavelength-Tunable Light Source - In at least one embodiment of the wavelength-tunable light source, it comprises an output source, which is capable in operation of generating electromagnetic radiation. Furthermore, the light source has a wavelength-selective first filter element, which is situated downstream from the output source. Moreover, the light source contains a first amplifier medium, which is situated downstream from the first filter element and is capable of at least partial amplification of the radiation emitted by the output source. The light source further comprises at least one wavelength-selective second filter element, which is situated downstream from the first amplifier medium, the second filter element having an optical spacing to the first filter element. The first filter element and the at least one second filter element are tunable via a control unit, which the light source has. | 03-29-2012 |
| 20120105945 | SPATIAL FILTERS FOR HIGH POWER LASERS - A spatial filter includes a first filter element and a second filter element overlapping with the first filter element. The first filter element includes a first pair of cylindrical lenses separated by a first distance. Each of the first pair of cylindrical lenses has a first focal length. The first filter element also includes a first longitudinal slit filter positioned between the first pair of cylindrical lenses. The second filter element includes a second pair of cylindrical lenses separated by a second distance. Each of the second pair of cylindrical lenses has a second focal length. The second filter element also includes a second longitudinal slit filter positioned between the second pair of cylindrical lenses. | 05-03-2012 |
| 20130342894 | Wavelength Conversion Laser System - The present invention relates to a wavelength conversion laser system and provides a wavelength conversion laser system including a semiconductor optical amplifier, an optical condenser that condenses light emitted from the optical amplifier, a diffraction grating plate that induces wavelength components of the light having passed through the optical condenser in different directions, and an optical very large scale integration (VLSI) processor. | 12-26-2013 |
| 20140146387 | Master Oscillator-Power Amplifier Drive Laser With Pre-Pulse for EUV Light Source - A device is described herein which may comprise an optical amplifier having a gain band including wavelengths λ | 05-29-2014 |
| 20140153083 | RIN REDUCED OPTICAL SOURCE FOR OPTICAL COHERENCE TOMOGRAPHY - A relative intensity noise (RIN)-suppressed light source is provided that includes a light source that produces an incoming light. A semiconductor optical amplifier (SOA) arrangement receives the incoming light and provides a significant reduction in the RIN as its output. The SOA arrangement includes one or more SOAs in saturation that behave like a high pass filter for the amplitude of the incoming light. | 06-05-2014 |
| 20140347720 | Multimode Optical Amplifier As A Receiver Pre-Amplifier For Free-Space Optical Communications - In the method for processing a signal light from free-space by amplifying said signal for free-space optical communications. wherein the improvement includes the steps of (a) pre-amplifying said signal light with low noise; and (b) coupling said signal light into a multimode filter which reduces coupling hisses compared to single mode filters. | 11-27-2014 |
| 20150009555 | OPTICAL AMPLIFICATION CONTROL APPARATUS AND CONTROL METHOD OF THE SAME - An optical amplification control apparatus is provided with: a first branch unit for branching an optical signal to which an additional optical signal with a predetermined wavelength has been added in a self node or a nearest node; a first filter unit for extracting the additional optical signal from one optical signal into which the first branch unit has branched; an amplification unit for amplifying the other optical signal into which the first branch unit has branched; a second branch unit for branching the optical signal amplified by the amplification unit; a second filter unit for extracting the additional optical signal from one optical signal into which the second branch unit has branched; and a first control unit for performing automatic gain control of the amplification unit based on the additional optical signal extracted by the first filter unit, and the additional optical signal extracted by the second filter unit. | 01-08-2015 |
| 20160164243 | Multipass fiber amplifiers - An apparatus and method for multipass fiber amplifier comprises: (a) first passing a laser beam having a first linear polarization in the fiber amplifier in a first direction, (b) rotating the first linear polarization of the laser beam to a second linear polarization, the second linear polarization is perpendicular to the first linear polarization, (c) second passing the laser beam having the second linear polarization in the fiber amplifier in a second direction, the second direction is opposite to the first direction, (d) third passing the laser beam having the second linear polarization in the fiber amplifier in the first direction, the laser beam having the second linear polarization is reflected by a polarization separating device and a mirror, (e) rotating the second linear polarization of the laser beam to the first linear polarization, and (f) fourth passing the laser beam having the first linear polarization in the fiber amplifier in the second direction. | 06-09-2016 |
| 359337210 | Grating | 3 |
| 20090147350 | AMPLIFIED SPONTANEOUS EMISSION REFLECTOR-BASED GAIN-CLAMPED FIBER AMPLIFIER - Provided is an all-optical gain-clamped fiber amplifier, comprising transmission and isolation means for periodically transmitting an optical signal or reflecting amplified spontaneous emission (ASE) back to a gain medium. The transmission and isolation means can be embodied by an optical interleaver or a number of optical fiber Bragg gratings. Accordingly, an optical signal can be amplified across the entire C-band, and an ASE reflector-based gain-clamped fiber amplifier having a wider dynamic range than conventional amplifiers can be implemented. | 06-11-2009 |
| 20090279165 | Three-terminal optical signal amplifying device - In the three-terminal optical signal amplifying device | 11-12-2009 |
| 20110317256 | MASTER OSCILLATOR-POWER AMPLIFIER DRIVE LASER WITH PRE-PULSE FOR EUV LIGHT SOURCE - A device is described herein which may comprise an optical amplifier having a gain band including wavelengths λ | 12-29-2011 |
