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7620078 |
Tunable semiconductor laser device, manufacturing method therefor, and gas detector using therewith
A tunable semiconductor laser device includes a wavelength control region that is formed to include an active layer formed above a semiconductor substrate in an optical waveguide which guides the...
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7606274 |
Mid-IR instrument for analyzing a gaseous sample and method for using the same
An optical nose for detecting the presence of molecular contaminants in gaseous samples utilizes a tunable seed laser output in conjunction with a pulsed reference laser output to generate a...
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7602823 |
Light-emitting element
A light-emitting element includes a light amplification unit and an external resonator. The light amplification unit has a function of amplifying light. The external resonator is connected to the...
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7599410 |
Semiconductor-diode-pumped solid state laser device
A solid state laser medium is composed of Nd:YAG, the wavelength of a second harmonic wave is 557 to 559 nm and a free spectral range of a solid etalon falls in any of the values of a range A of...
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7599409 |
Electromagnetic wave generating device
An electromagnetic wave generator encompasses a first pump beam emitter ( 2 ) configured to emit a first pump beam (hv 1 ) having a wavelength larger than one micrometer; a second pump beam emitter...
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7599408 |
Tunable narrow linewidth laser source
A tunable laser source has a first laser source to generate a low power continuous wave laser light having a wavelength λ 1 . A second laser source generates a low power continuous wave laser...
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7595463 |
Laser processing machine with monitoring of gas atmosphere and operating gases
A laser processing machine includes a measuring cell into which gas to be analyzed can flow, a means for decoupling diagnostic radiation from the laser radiation provided for material processing of...
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7593436 |
Electrooptically Bragg-reflector stopband-tunable optoelectronic device for high-speed data transfer
A device contains at least one wavelength-tunable multilayer interference reflector controlled by an applied voltage and at least one cavity. The stopband edge wavelength of the wavelength-tunable...
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7580183 |
Light generator, optical amplifier, and optical communication system
In an optical amplifier according to the present invention, a change signal from a change signal source is fed into a light source or a drive circuit. The wavelength of light outputted from the...
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7573919 |
Wavelength control of an external-cavity tuneable laser
A method of controlling an external-cavity tuneable laser which has a wavelength-elective tuneable mirror, in which wavelength selectivity is achieved by an electrical signal provided by an...
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7564880 |
Laser intra-cavity electronic wavelength tuner
An apparatus for adjusting the wavelength of a laser capable of lasing at multiple wavelengths by using a single acousto-optical modulator and a pair of optical reflectors inside a laser cavity. By...
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7561603 |
Integrated semiconductor light source
Provided is an integrated semiconductor light source using locking characteristic by an external light injection, including: an active region controlling an optical gain and an optical output by...
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7558298 |
Laser device triggered by a photonic fiber
A device producing laser pulses of durations smaller than 30 ns, and including along its internal optical axis: a laser resonator of optical length smaller than 2 m including two reflecting ends...
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7535935 |
Spectroscopic catheter system with widely tunable source and method of operation
A laser system for a spectroscopic catheter system uses multiple semiconductor gain media having gain peaks at different wavelengths. The output from the gain media is preferably coupled into...
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7529280 |
Tunable laser apparatus and methods
A tunable laser has a first optical element spaced apart from a second optical element to form a laser cavity of fixed length there between. An optical gain medium is in at least part of the laser...
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7529279 |
Tuneable laser
A tuneable laser includes a gain section ( 50 ) bounded by two mirrors ( 51 and 52 ) at least one mirror being a chirp grating. At least one of the mirrors includes a plurality of selectable...
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7522642 |
Method and system for laser amplification using a dual crystal Pockels cell
A system for laser amplification includes a dual-crystal Pockels cell which is used to control emission of laser pulses from an ultra-fast laser. The Pockels cell is constructed to enable...
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7508849 |
Wavelength tunable laser device
A semiconductor optical amplifier, an acousto-optic tunable filter, a phase shifter, a lens, and an internal etalon are arranged in a resonator. Outside the resonator, two lenses, two beam...
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7505492 |
Alignment of lasing wavelength with wavelength conversion peak using modulated wavelength control signal
According to one embodiment of the present invention, a programmable light source comprises one or more semiconductor lasers, a wavelength conversion device, and a laser controller. The controller...
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7505490 |
Phase-control in an external-cavity tuneable laser
A single-mode external-cavity tuneable laser includes a gain medium, a tuneable element and a channel allocation grid element. The channel allocation grid element is preferably an FP etalon which...
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7496118 |
External cavity resonator type tunable light source which can be easily manufactured and which is capable of wavelength sweeping at high speed
A collimator lens converts light beams emitted from a low reflectance facet of a semiconductor laser into parallel light beams. A diffraction grating receives and diffracts the light beams at a...
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7489714 |
Speckle reduction laser and laser display apparatus having the same
A speckle reduction laser and a laser display apparatus having the speckle reduction laser are provided. The speckle reduction laser includes a semiconductor unit that comprises an active layer and...
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7489713 |
Tunable fiber laser light source
An optical fiber loop has a gain medium having a gain at an oscillation wavelength and optical circulators 13 and 14 . Collimate lenses 22 and 24 enlarge light bean taken from the optical...
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7486709 |
Semiconductor laser micro-heating element structure
A semiconductor laser is provided comprising a semiconductor substrate, an active region, a ridge waveguide, a driving electrode structure, and a micro-heating element structure. The micro-heating...
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7483599 |
Method of calibrating a monolithic transmitter photonic integrated circuit (TXPIC) chip
A method of calibrating a monolithic transmitter photonic integrated circuit (TxPIC) chip is disclosed where the chip contains integrated arrays of laser sources and electro-optic modulators...
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7482589 |
Method and system for noise control in semiconductor spectroscopy system
An optical power control system for a semiconductor source spectroscopy system controls power fluctuations in the tunable signal from the spectroscopy system and thus improves the noise performance...
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7477818 |
Bragg grating elements for optical devices
Fiber optic devices including volume Bragg grating (VBG) elements are disclosed. A fiber optic device may include one or more optical inputs, one or more VBG elements, and one or more optical...
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7474685 |
Multi-line tunable laser system
A multi-line tunable laser system, which uses lasers as light sources to illuminate, identify and or quantify one or more targets based on multi-dimensional spectral characteristics of each target....
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7468997 |
System for swept source optical coherence tomography
A swept source Optical coherence tomography system (SSOCT) comprises a vertical cavity surface-emitting laser with an integrated MEMs tunable mirror movable by electro-static deflection. The MEMs...
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7468996 |
External cavity laser tuning element dither servo control
According to embodiments of the present invention, an external cavity laser includes one or more tuning elements. At least one modulated voltage signal or dither is used to lock the transmission...
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7463668 |
Wavelength tunable cavity with rotational movement
A wavelength tunable cavity includes a first reflecting unit adapted to at least partially reflect a beam of electromagnetic radiation towards a second reflecting unit, adapted to at least...
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7460572 |
Optical module and method for monitoring and controlling wavelengths
The present invention provides wavelength monitoring and/or control enabling size reduction and low power operation without requiring a complicated optical system in its wavelength monitoring and...
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7460568 |
Apparatus as tuning filter
An apparatus as a tuning filter is provided for tuning the wavelength of a laser or a filter between extensive bandwidths, including a reflecting element, an optical system and a movable mount set...
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7460567 |
Laser wavelength locker
The method and system operate to maintain a widely tunable laser (WTL) at a selected transmission wavelength. To lock the WTL to an ITU grid line, a portion of the output beam from the WTL is...
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7457329 |
Method and system for a high power low-coherence pulsed light source
A high power pulsed optical source includes a multi-port optical circulator and a seed source coupled to a first port of the multi-port optical circulator. The seed source is adapted to provide...
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7447246 |
Q-modulated semiconductor laser
A Q-modulated semiconductor laser comprises an optical gain section and an electro-absorptive modulator section, separated by a vertically etched air gap acting as a partially reflecting mirror....
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7443893 |
Method and system for tunable pulsed laser source
A tunable pulsed laser source comprising a seed source adapted to generate a seed signal and an optical circulator. The optical circulator includes a first port coupled to the seed source, a second...
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7443891 |
Widely tunable laser
A Fabry-Perot laser and a micro-actuator are utilized to provide continuous tuning over a range of wavelengths.
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7436865 |
Tunable optical oscillator
A tunable optical oscillator with a period based on the speed of light is used to produce a periodic pulsed light signal with low jitter, low drift and high spectral purity. The pulsed light signal...
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7436864 |
Method for optimising the calibration process of a tuneable laser
A method relating to the calibration of tuneable lasers is described. The method provides for the provision of correct control currents so as to achieve each of desired output frequencies from the...
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7430227 |
Wavelength tunable laser source with parameter correction
A wavelength tunable laser unit has a laser mode selection, and is adapted to provide a laser signal in accordance with one or more laser control parameters. For operating the laser unit, the laser...
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7428254 |
Athermalisation of tuneable lasers
This invention describes a technique and apparatus to use any tuneable laser to generate a specified output frequency without controlling its temperature. This technique only involves a thermal...
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7428253 |
Method and system for a pulsed laser source emitting shaped optical waveforms
A tunable pulsed laser source includes a seed source adapted to generate a seed signal and an optical circulator having a first port coupled to the seed source, a second port, and a third port. The...
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7426222 |
Laser apparatus
A laser apparatus is disclosed. An optical element receives at least a part of laser light emitted from a laser generation source and generates interference fringes. Each of first and second...
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7424041 |
Wide tuneable laser sources
A method of manufacturing a tuneable laser assembly including a substrate having formed thereon a plurality of tuneable lasers including Multi Quantum Well (MQW) active sections as well as...
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7423279 |
Systems and methods that detect changes in incident optical radiation
Systems, methods and sensors detect changes in incident optical radiation. Current is driven through one or more active areas of a detector while the incident optical radiation illuminates the...
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7415049 |
Laser with tilted multi spatial mode resonator tuning element
An external cavity laser has a mirror-based resonant tunable filter, such as a Fabry Perot tunable filter or Gires-Tournois interferometer tuning element, with the tunable filter being preferably...
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7414779 |
Mode locking methods and apparatus
In one aspect the invention relates to a frequency varying wave generator. The generator includes a gain element adapted to amplify a wave having a wavelength; a time varying tunable wavelength...
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7411992 |
Light wavelength converting apparatus, control method of the same, and image projecting apparatus using the same
A light wavelength converting apparatus includes a semiconductor laser having gain, phase, and DBR regions, a nonlinear optical device for receiving fundamental-wave light emitted from the...
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7406107 |
Semiconductor spectroscopy system
An optical power control system for a semiconductor source spectroscopy system controls power fluctuations in the tunable signal from the spectroscopy system and thus improves the noise performance...
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