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US20090245305 Laser System With Segmented Diode Laser  
Disclosed is a laser system comprising: A laser assembly (101) comprising a plurality of emitters; first and second light feedback devices (208, 232) forming respective external cavities with the...
US20090213882 LASER SOURCE THAT GENERATES A PLURALITY OF ALTERNATIVE WAVELENGTH OUTPUT BEAMS  
A laser source (10) for emitting a set of sequential, different wavelength output beams (12) includes a gain medium (16), a feedback assembly (26) and a control system (30). The gain medium (16)...
US20090225798 Optical apparatus and method  
An optical apparatus comprising a gain medium exhibiting polarisation dependent absorption along two axes, the gain medium having a weakly absorbing axis and a strongly absorbing axis, an optical...
US20100091806 Semiconductor Lasers with Improved Temporal, Spectral, and Spatial Stability and Beam Profile Uniformity  
A method for improving spectral, spatial, and temporal stability of semiconductor lasers and their beam profile uniformity based on statistical average of plural transient or unsteady state...
US20070053392 Optical transmitting module including laser diode mounted on driver circuit  
The present invention is to provide alight emitting module that improves the positional precision of a semiconductor laser diode. A light emitting module of the present invention is configured...
US20060227824 Spectral conditioning mechanism  
An optical assembly is disclosed. The optical assembly includes a laser having a front facet and a rear facet a thin film filter (TFF) to receive a first optical signal from the front facet of the...
US20080225910 LASER DRIVER BIAS CURRENT CALIBRATION  
A method for a calibration module to calibrate laser bias current in an optical transceiver. The method comprises causing the calibration module to configure a control module of the optical...
US20110103415 OPTICAL DEVICE FOR WAVELENGTH LOCKING  
An optical device comprising a 1×2 optical coupler on a planar substrate and a waveguide on the planar substrate, the waveguide having a first arm and a second arm coupled to the 1×2 optical...
US20050249250 Laser diode monitoring system  
A laser diode monitoring system, including a thermistor, a monitoring unit, and a laser diode is disclosed. Thermistor is to receive a temperature for outputting an electrical temperature signal....
US20070237195 Light Source, Method for Controlling Light Source, and Method for Replacing Light Source  
In a light source constructed from a plurality of laser diodes, the overall light output of the light source is controlled based on calibration data which is generated for each pair consisting of...
US20070223544 Laser beam processing apparatus  
This laser processing apparatus includes an amp fiber, a seed laser oscillating unit, a fiber core exciting unit, a laser emitting unit, a controlling unit, a light sensor, etc. A Q-switched pulse...
US20090252187 Minimizing Power Variations In Laser Sources  
The present invention relates generally to semiconductor lasers and laser projection systems. According to one embodiment of the present invention, a projected laser image is generated utilizing...
US20090201955 ILLUMINATION APPARATUS AND METHOD FOR CONTROLLING ENERGY OF A LASER SOURCE  
The disclosure relates to an illuminating apparatus for illuminating a sample on a work stage, optionally with a relatively narrow illuminating line of relatively controlled energy, as well as...
US20090154511 OPTICAL OUTPUT CONTROL CIRCUIT AND OPTICAL OUTPUT MONITORING METHOD FOR MONITORING OPTICAL OUTPUT FROM LASER LIGHT SOURCE  
A Light receiver generates a monitoring voltage according to an optical output of an LD element. The control circuit obtains a set value according to the ambient temperature around the LD element,...
US20080304524 QUANTUM CASCADE LASER SUITABLE FOR PORTABLE APPLICATIONS  
A highly portable, high-powered infrared laser source is produced by intermittent operation of a quantum cascade laser power regulated to a predetermined operating range that permits passive...
US20050041703 Laser system  
A laser system for controlling output of a laser oscillator based on a monitor light obtained by splitting a laser beam, comprising a light emitting means for emitting the laser beam, a luminous...
US20070047603 Optical Transmitter with Monitoring Photodiode Compensated in Temperature Dependence Thereof  
The optical transmitter according to the present invention is capable of reducing wavelength fluctuations of a semiconductor laser (laser diode) owing to the temperature dependence of the light...
US20060159141 Optical transmitting module operable in wide temperature range  
The present invention relates to an optical transmitting module that reduces the deviation of the emission wavelength even in a wide range of the operating temperature. The module comprises a...
US20140346358 QUANTUM CASCADE LASER SUITABLE FOR PORTABLE APPLICATIONS  
A highly portable, high-powered infrared laser source is produced by intermittent operation of a quantum cascade laser power regulated to a predetermined operating range that permits passive...
US20120210589 QUANTUM CASCADE LASER SUITABLE FOR PORTABLE APPLICATIONS  
A highly portable, high-powered infrared laser source is produced by intermittent operation of a quantum cascade laser power regulated to a predetermined operating range that permits passive...
US20090225801 SEMICONDUCTOR OPTICAL ELEMENT AND EXTERNAL CAVITY LASER HAVING THE SEMICONDUCTOR OPTICAL ELEMENT  
The present invention provides a semiconductor optical element applicable to an EC-LD or an SLD, and an external cavity laser having the semiconductor optical element. The semiconductor optical...
US20050083978 Method for controlling laser beam power balance in laser scanning unit  
A method for controlling a laser beam power balance in a laser scanning unit is disclosed. The method of present invention comprises the steps of obtaining a first voltage value and a second...
US20140086593 PHASE LOCKED LOOP  
An optical phase-locked loop (OPLL) comprising a phase-frequency detector; first and second lasers; a local oscillator; a detector and a low pass filter connected in a circuit comprising a...
US20120224865 PHASE LOCKED LOOP  
An optical phase-locked loop (OPLL) comprising a phase-frequency detector; first and second lasers; a local oscillator; a detector and a low pass filter; operably connected in a circuit comprising...
US20150036705 METHOD FOR CONTROLLING WAVELENGTH-TUNABLE LASER  
The method for controlling a wavelength-tunable laser comprises a first step of acquiring a driving condition of the wavelength-tunable laser for laser oscillation at a first wavelength, and a...
US20050271096 Laser output temperature compensation  
A method according to one embodiment includes measuring a temperature of a laser tube. The method may also include generating a feedback signal indicative of the temperature of the laser tube. The...
US20070230520 System, Method, and Apparatus to Provide Laser Beams of Two or More Wavelengths  
A system, apparatus, and method may provide laser beams of two or more wavelengths from diode pumped solid-state laser sources (220, 222, 224). The beam paths of these laser beams with different...
US20090225800 VERY LOW-NOISE SEMICONDUCTOR LASER  
The subject of the invention is a laser comprising a semiconductor active medium with a population inversion lifetime τc and a resonant cavity with a lifetime of the photons in the cavity τp. The...
US20080165813 METHOD AND APPARATUS FOR CONTROLLING LASER MODULATION BASED ON MEASUREMENTS OF AVERAGE LASER OUTPUT POWER  
Laser modulation is controlled by using a measurement of the average output power level of the laser to adjust the amplitude of the modulation current as necessary to prevent the laser from being...
US20110129227 Wavelength Stabilization and Locking for Colorless Dense Wavelength Division Multiplexing Transmitters  
An apparatus comprising a laser transmitter having a first side and a second side, a filter coupled to the first side, a detector coupled to the second side, and a temperature controller coupled...
US20110228801 System and Method to Regulate High Current Radiation Sources  
Disclosed is a high current radiation system. The system includes a high current radiation source to generate radiation and an analog circuit to generate, based, at least in part, on an input...
US20050111504 Laser oscillator  
A laser oscillator capable of executing a high-speed feedback control by reducing the control load of a main processor in the feedback control of the laser output. The laser is excited by an...
US20080170596 Method and apparatus for obtaining single longitudinal mode (SLM) radiation from a pulsed Nd:YAG laser  
The invention includes a method for seeding and stabilizing an optical device, including a continuous wave laser, a pulsed laser or a parametric system, having an adjustable cavity length and an...
US20130016745 DRIVER FOR LASER DIODE INTEGRATED WITH EXTERNAL MODULATOR  
A driver for EA-DFB device is disclosed. The EA-DFB device is put between the positive power supply and the negative power supply as connected in series to the bias current source and the...
US20090103578 Method of Protecting a Laser Against Damage Caused by Undesired Incident Light in a Resonator  
A method of protecting a laser against damage caused by undesired incident light in a resonator includes measuring a parameter, which is a measure for the optical power of the incident light. In...
US20120269215 Bias circuit of electro-absorption modulated laser and calibration method thereof  
A bias circuit of an electro-absorption modulated laser and a calibration method thereof are provided. The bias circuit includes a drive circuit and a direct current bias voltage circuit. The...
US20100246614 WAVELENGTH VARIABLE LIGHT SOURCE SYSTEM  
There is provided a wavelength variable light source system capable of changing wavelength and intensity of output signal light and of improving preset accuracy and stability of the wavelength and...
US20100054288 Method and Device for Reducing Laser Phase Noise  
The present invention relates to a method and device for reducing the phase noise of a laser signal from a laser source. This device comprises a first current generator for supplying a driving...
US20090274471 METHOD AND APPARATUS FOR CONTROLLING THE OPTICAL OUTPUT POWER FROM A BURST MODE LASER  
An optical network terminal is provided for use in a passive optical network (PON). The optical network terminal includes a data port for receiving data packets from an external device and a...
US20070008995 Frequency-stabilized laser and frequency stabilizing method  
The invention provides a frequency-stabilized laser and frequency-stabilizing method capable of stabilizing an oscillation frequency of laser beam. A photodetector detects an optical output signal...
US20100272135 Self-Seeded Wavelength Conversion  
A method of operating a frequency-converted laser source is provided. According to the method, the gain section of a laser diode is driven such that the pulse repetition frequency νP of the laser...
US20100272127 LASER APPARATUS WITH FEEDBACK FOR DISPERSIVE OUTPUT TO A PIN-HOLE ELEMENT  
There is provided a laser apparatus that includes a laser emitter configured to emit a laser emitter output beam. The apparatus includes a transmissive grating positioned with the laser emitter...
US20100265974 POWER MONITORING SYSTEM FOR A PARALLEL OPTICAL TRANSMITTER  
A power monitoring system uses a low loss reflective element to partially split the output laser beams from an array of laser sources, in a parallel configuration, to produce a monitor beams for...
US20100246613 SEMICONDUCTOR LASER, METHOD FOR GENERATING LASER BEAM AND METHOD FOR REDUCING A SPECTRAL LINE-WIDTH OF LASER BEAM  
A semiconductor laser is provided capable of generating very narrow laser beams and having stable characteristics, a method for generating the laser beams and a method for reducing a spectral...
US20100195682 LASER PULSE GENERATING APPARATUS AND METHOD  
Jitter and waveform are improved by reducing the wavelength spectrum width of a laser beam pulse. In a laser pulse generating apparatus according to the present invention, a semiconductor laser...
US20100158055 METHOD AND APPARATUS FOR CONTROLLING AND MONITORING LASER POWER IN BARCODE READERS  
A method of monitoring the output power of a laser diode in a barcode reader. The method includes sampling a threshold monitoring-current that is related the driving-current passing through the...
US20100150189 LASER CONTROL METHOD AND LASER CONTROL CIRCUIT  
A laser control method includes the steps of: using a laser control circuit which includes a constant current circuit that maintains a constant current flowing through a semiconductor laser...
US20100135346 INTEGRATED OPTICAL COMB SOURCE SYSTEM AND METHOD  
The present invention provides a system and method for creating a coherent optical comb comprising a plurality of lasers, each laser providing an optical output channel; means for combining each...
US20080181267 OPTICAL DEVICE AND METHOD FOR MANUFACTURING THE SAME  
An optical device, including: a surface emitting semiconductor laser; and a photodetection device for detecting part of laser light emitted from the surface emitting semiconductor laser; the...
US20170117682 ENERGY RATIO SENSOR FOR LASER RESONATOR SYSTEM  
A device includes a first sensor configured to generate a first output signal corresponding to an energy of a portion of a forward beam transmitted by a mirror of a laser resonator system. The...

Matches 1 - 50 out of 77 1 2 >