Product
Patsnap Eureka
For R&D, Patsnap Eureka makes reading and utilizing patents & technical documents easy.
Patsnap Eureka AIR
Designed for self-driven R&D workflows. Generate viable solutions, solve complex R&D challenges, empower your innovation with AI.
Patsnap Eureka Materials
Designed for material experts only. Revolutionize your material R&D, from search, analyze, to developing new materials.
Feature
TechResearch
Generate reliable direction feasibility study reports for your R&D in just a few steps.
TechSeek
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
TechMind
As an expert in R&D Theories, TechMind can generates customized viable solutions instantly.
TechRisk
Analyze your overall solution with one click, know your potential R&D risks in advance.
TechMonitor
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
218results about How to "Narrow line width" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Pair of optically locked semiconductor narrow linewidth external cavity lasers with frequency offset tuning
ActiveUS20100303111A1Guaranteed long-term stable operationLess-high frequency noiseLaser detailsLaser optical resonator constructionLoop filterExternal cavity laser
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.
Owner:OPTASENSE
Touch display panel and display apparatus
InactiveUS20110080376A1Manufacturing precision is very highLow transmitting line resistanceStatic indicating devicesNon-linear opticsTouch SensesMedia layer
Owner:AU OPTRONICS CORP
Laser curing apparatus with real-time monitoring and control
InactiveUS20060044555A1Improve curing effectAvoid over-curingRadiation pyrometrySpectrum investigationOptoelectronicsMonitoring and control
In a laser based curing apparatus, the acts both as the curing light and the excitation source for a Raman spectroscopic sensor. The spectroscopic sensor provides real-time, in situ, non-invasive curing status monitoring via Raman spectroscopy. The spectroscopic information can be further used to control the operation parameters of the laser to achieve the optimum cure result.
Owner:METROHM SPECTRO INC
Method and device for implementing Ramsey-CPT atomic frequency standard by microwave periodic On-Off modulation VCSEL
ActiveCN101847994AImprove stabilityNarrow line widthPulse automatic controlPreselected time interval producing apparatusElectricityMicrowave
Owner:WUHAN INST OF PHYSICS & MATHEMATICS CHINESE ACADEMY OF SCI
Method for the hyperpolarisation of nuclear spin in a diamond via a long-range interaction
ActiveUS20160061914A1Narrow line widthEfficient transferQuantum computersNanoinformaticsColour centreOptical pumping
The invention concerns a method for the hyperpolarisation of 13C nuclear spin in a diamond, comprising an optical pumping step, in which colour centre electron spins in the diamond are optically pumped. The method further comprises a transfer step in which the polarisation of a long-lived state of the colour centre electron spins is transferred to 13C nuclear spins in the diamond via a long-range interaction.
Owner:UNIV ULM
Surface-emitting terahertz quantum cascade laser and manufacturing method thereof
ActiveCN102545056ANarrow line widthSmall divergence angleOptical wave guidanceLaser active region structureLaser lightCoupling loss
The invention provides a surface-emitting terahertz quantum cascade laser and a manufacturing method thereof. The laser comprises a single mode producing zone waveguide, a cone-shaped coupled zone waveguide and a surface-emitting zone waveguide, wherein the single mode producing zone waveguide and the cone-shaped coupled zone waveguide respectively adopt a first-order grating structure; the surface-emitting zone waveguide adopts a second-order grating structure; single mode terahertz seed light is produced in the single mode producing zone waveguide; the cone-shaped coupled zone waveguide is used for amplifying the terahertz seed light and coupling the terahertz seed light to the surface-emitting zone waveguide; and the surface-emitting zone waveguide enables the terahertz laser light to be exited vertical to the surface of a substrate. According to the surface-emitting terahertz quantum cascade laser, terahertz laser surface emitting with large power, narrow linewidth, small angle of divergence is realized, the laser emission of horizontal high-order mode is restrained to some extent, and the coupling loss and the end face loss between the waveguides are simultaneously reduced.
Owner:SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
Illumination optical system and laser processor having the same
InactiveUS6894839B2Superior image formationImprove light uniformityPhotomechanical exposure apparatusMicrolithography exposure apparatusBeam expanderLine width
An illumination optical system has superior image formation capabilities, and can radiate a linear beam with excellent illumination uniformity and a narrow line width having a large aspect ratio; the illumination optical system comprises an afocal beam expander system which expands an beam illuminated from a laser light source; a linear beam-forming lens system having at least refractive power in a second direction which is substantially at a right angle to at least a first direction, the linear beam-forming lens system converting the beam, illuminated from said beam expander system, to a linear beam having its long side in said first direction; a lens array section having a plurality of element lenses, arranged along said first direction; and a condenser optical system which illuminates a processed face by reconnecting images of said linear beam from each of said element lenses thereon.
Owner:IHI CORP
External cavity widely tunable laser using a silicon resonator and micromechanically adjustable coupling
InactiveUS20120195332A1Widely tunableEasy to manufactureOptical resonator shape and constructionSemiconductor lasersTunable laserMicrolens
A widely tunable laser is described where a compound semiconductor gain chip is coupled to a waveguide filter fabricated on silicon. The filter has two resonators with different free-spectral-ranges, such that Vernier tuning between the filters can be used to provide a single wavelength of light feedback into the gain chip, where the wavelength is adjustable over a wide range. The coupling between the gain chip and the filter is realized through a microlens whose position can be adjusted using micromechanics and locked in place.
Owner:T&S COMM
Achieving low phase noise in external cavity laser implemented using planar lightwave circuit technology
ActiveUS20100303121A1Reduce phase noiseManufacturing variabilityOptical resonator shape and constructionSemiconductor lasersLow noisePhase noise
The present invention relates to external cavity laser (ECL) apparatuses and manufacturing processes, and more particularly to implementing low noise narrow bandwidth ECLs on planar lightwave circuit (PLC) platforms for harnessing high-performance, high-stability operation from a compact-footprint, low-power packaged device. An ECL device with narrow linewidth and low noise is disclosed, the device comprising a PLC device and a gain chip butt-coupled to each other. The PLC device has a planar Bragg grating (PBG) integrated onto a rectangular waveguide. The PLC device has anti-reflection coatings (ARC) on its input facet and output facet. The waveguide is designed to be selective of a single polarization. The gain chip has high-reflection coating (HRC) on a back facet and an ARC on a front facet. An operating wavelength of the ECL is aligned to a longer wavelength red slope of a reflectivity spectrum of the PBG. The operating wavelength may be tuned thermally, electrically, or thermo-electrically.
Owner:OPTASENSE
Wide-tuning and narrow-linewidth nanosecond pulse double-resonance medium-infrared parameter oscillator
ActiveCN106711745AEasy to tuneWide coverageOptical resonator shape and constructionActive medium shape and constructionLine widthSpectroscopy
The invention provides a double-resonance, wide-tuning and narrow-linewidth all-solid-state nanosecond pulse medium-infrared optical parameter oscillator comprising four parts including single-frequency pump light, a double-resonance resonant cavity, an electrical control part and seed light. A 1.064 <mu>m single-frequency pulse laser pump quasi-phase matching multi-cycle polarized crystal double-resonance parameter oscillator is adopted to acquire dual-band laser output of wide-tuning range near-infrared signal light and medium-infrared idle light. The output central wavelength is tunable within the wide spectral range, and the cavity length is dynamically adjusted through electro-optical crystal by combining a single-frequency continuous semiconductor laser seed injection technology so as to realize narrow-linewidth laser output of the optical parameter oscillator. The oscillator can be widely applied to the field of high-resolution laser spectroscopy, laser radar, laser remote sensing, environmental detection, optical-electro countermeasure and laser medicine.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Laser curing apparatus with real-time monitoring and control
InactiveUS7245371B2Reduce sensitivityReduce monitoring costsRadiation pyrometrySpectrum investigationOptoelectronicsMonitoring and control
In a laser based curing apparatus, the acts both as the curing light and the excitation source for a Raman spectroscopic sensor. The spectroscopic sensor provides real-time, in situ, non-invasive curing status monitoring via Raman spectroscopy. The spectroscopic information can be further used to control the operation parameters of the laser to achieve the optimum cure result.
Owner:METROHM SPECTRO INC
Paste composition for front electrode of solar cell and solar cell using the same
InactiveUS20140318618A1Decreased front electrode resistanceImprove battery efficiencyMaterial nanotechnologyLiquid surface applicatorsHexanoic acidSolar cell efficiency
The present invention relates to a paste composition for a front electrode of a solar cell comprising nano silver powder surface-treated with hexanoic acid, and a solar cell comprising a front electrode formed using the paste composition.According to the present invention, a front electrode is formed using a paste composition containing nano silver powder surface-treated with hexanoic acid, thereby decreasing resistance of a front electrode and broadening an area capable of absorbing light, to improve solar cell efficiency.
Owner:HANWHA CHEMICAL CORPORATION
Detection of nano-scale particles with a self-referenced and self-heterodyned raman micro-laser
InactiveUS20150285728A1Maintain biocompatibilityEasy to useNanotechRadiation pyrometryWhispering galleryParticle size measurement
A system and method for is a micro-laser based nano-scale object detection system and method using frequency shift and / or mode splitting techniques. The system and method can provide highly sensitive detection of nanoparticles with a self-referenced and self-heterodyned whispering-gallery Raman micro-laser. The system and method also provides for nano-particle size measurement.
Owner:WASHINGTON UNIV IN SAINT LOUIS
Optical wavelength measuring device using guiding body and diffractive structure
InactiveUS7355162B2Easy to manufactureNarrow line widthRadiation pyrometrySpectrum investigationSpatially resolvedImage resolution
An optical characterization device has a guiding body and a diffractive structure integrated with it. The guiding body delivers radiation to the diffractive structure at a preselected angle and the diffractive structure diffracts at least a portion of radiation guided to it to give spatial resolution according to wavelength. A position sensitive detector detects the position of the spatially resolved radiation and thus the radiation can be characterized according to wavelength. Embodiments can be used to monitor and adjust the wavelength of a radiation source, using a feedback connection. By using the integrated approach, a very small structure can be realized and the structure can be relatively simply fabricated and assembled. The guiding body might be either capable of supporting multimode propagation of the radiation or might be a single mode waveguide. Where it is capable of supporting multimode propagation, an input to the guiding body acts to select a mode for propagation of the radiation.
Owner:OPTITUNE
Raman spectra measuring device for multi-wavelength laser frequency shift excitation
InactiveCN104597034ASuppress interferenceFrequency-shifted excitationRaman scatteringGratingFluorescence
The invention relates to a Raman spectra measuring device for multi-wavelength laser frequency shift excitation. The Raman spectra measuring device comprises at least two semiconductor lasers used for generating lasers with fixed wavelengths, at least two laser control modules used for controlling parameters of the lasers, a fiber-optical switch used for switching light sources of the semiconductor lasers, a Raman probe used for carrying out focusing excitation on a sample to be detected and collecting Raman optical signals generated by the sample, a sample cell used for placing the sample to be detected, a grating splitting module used for dividing the Raman optical signals on space, a spectral data acquisition module used for carrying out photoelectric conversion on the Raman optical signals and an arithmetic processing module used for analyzing and extracting Raman spectra. The Raman spectra measuring device is capable of overcoming the disadvantages of the common tunable laser of instability, complex device or the like, effectively inhibiting fluorescence interference and realizing Raman spectra detection under strong fluorescence background.
Owner:XIAMEN UNIV
Method and apparatus for generating mid and long ir wavelength radiation
ActiveUS20060050749A1Reduces intrinsic bandwidthNarrow line widthLaser using scattering effectsOptical resonator shape and constructionSeeds sourceLine width
A narrow line width optical parametric oscillator (OPO) (10) is used a pump for a tunable optical parametric oscillator to enable it to produce a mid and long wavelength IR output over a wide 5-20 micron bandwidth. The pumping OPO (10) is then set up to be non-colinearly phase matched. To enable the pumping OPO (10) to exhibit the narrow line width, it is seeded with a narrow line width seeding source. The result is output energy having an extremely narrow 4 nanometer line width. The narrowness of the pumping OPO (10) output is derived first by using noncolinear phase matching in the pumping OPO (10) and secondly by using seeding in the pumping of the pumping OPO (10).
Owner:BAE SYST INFORMATION & ELECTRONICS SYST INTERGRATION INC
Apparatus for measuring ultra narrow laser line width by Brillouin optical fibre ring laser and measuring method
InactiveCN1598480AOvercoming complexityOvercome precisionUsing optical meansFiber couplerMeasurement device
The invention is a device and measuring method for using Brillouin optical fiber circle laser to measure linewidth of ultra-narrow laser, which relates to a measuring device and method for laser linewidth. The output of the laser source is connected to the input of the isolator, the output of the isolator is connected to the input of the fiber coupler, the output of the coupler is connected to the inlet of the fiber coupler, the output of the fiber coupler is connected to the input of the photoelectric diode, the output of the photoelectric diode is connected to the input of the frequency spectrum analyzer, the fiber circular cavity is formed by connection one end of the aperture circle made up of unimodular fiber and the port of the fiber coupler, another end of the aperture circle is connected to the port three of the coupler. The method is: the laser needed to be measured is sent into the fiber circle cavity, when the power of the laser needed to be measured reach the threshold of SBS, it generates a first order Stokes light in the coupler, when the power of the first order stokes light reach the SBS threshold, it generates the second order stokes light in the coupler, then the second order stokes light and the laser needed to be measured frequency are analyzed by the frequency spectrum analyzer, and the linewidth can be acquired.
Owner:HARBIN INST OF TECH
Microwave-signal generating method and device based on excited brillouin scattering effect and optical frequency comb
Provided is a microwave-signal generating method and device based on the excited brillouin scattering effect and the optical frequency comb in high nonlinear fibers. The invention belongs to the technical field of microwave photonics. The device comprises a tunable laser, a first coupler, a second coupler, a first circulator, a second circulator, a first high nonlinear fiber, an attenuator, a fourth coupler, a first photoelectric detector, a power divider, an intensity modulator, a fourth DC voltage regulator, a first double parallel mach-zehnder modulator, a fifth DC voltage regulator, a sixth DC voltage regulator, a seventh DC voltage regulator, a third circulator, a second high nonlinear fiber, a third coupler, a second photoelectric detector, a microwave amplifier, a second double parallel mach-zehnder modulator, a first DC voltage regulator, a second DC voltage regulator, a third DC voltage regulator, an isolator, a fifth coupler, a third photoelectric detector and a frequency analyzer. Due to the advantages of mode selection and positive feedback of a photoelectric oscillator, the microwave signals which are output by the device have the advantages of good spectrum purity and low noises.
Owner:JILIN UNIV
Tunable narrow-linewidth fiber laser based on interval tunable phase shift fiber gratings
The invention relates to a tunable narrow-linewidth fiber laser based on an interval tunable phase shift fiber gratings. The tunable narrow-linewidth fiber laser based on the interval tunable phase shift fiber gratings comprises a laser device (LD), a WDM coupler, an erbium-doped fiber loop, an optical isolator, a circulator, the fiber gratings, a phrase shift fiber grating tuner, an optical coupler, a wavelength meter, an input and control circuit and an output optical coupler, wherein the WDM coupler, an erbium-doped fiber, the optical isolator, the circulator, the phrase shift fiber grating tuner and the optical coupler form an loop cavity; the circulator, the fiber gratings and the phrase shift fiber grating tuner form an adjustable filter inside the cavity. Phase shift amount of the phrase shift fiber gratings is changed by changing the length of an air gap between the two fiber gratings so that tuning of output laser wavelength can be achieved. According to the tunable narrow-linewidth fiber laser based on the interval tunable phase shift fiber gratings, the tunable phase shift fiber gratings, the optical coupler, the wavelength meter, the input and control circuit and the output optical coupler form an input and feedback control loop, the needed laser wavelength is obtained through feedback control, and stability of the laser output wavelength is ensured.
Owner:BEIHANG UNIV
Two-dimensional topological photonic crystal cavity, design method thereof and application in laser
ActiveCN110727047ANumber of independently controllable modesIndependently controllable mode field areaLaser optical resonator constructionOptical light guidesPhotonic crystal cavityHigh energy
The invention discloses a two-dimensional topological photonic crystal cavity, a design method thereof, and application in a laser. The two-dimensional topological photonic crystal cavity comprises aplurality of photonic crystal supercells that have a vortex-type structure change around the cavity center of the two-dimensional topological photonic crystal cavity, and the energy band of the plurality of photonic crystal supercells has a Dirac point at the equilibrium position where the vortex-type structure changes. The two-dimensional topological photonic crystal cavity, also known as a Diracvortex cavity, has the characteristics such as large mode field area, large free spectral range, narrow beam divergence angle, degeneracy of any mode and compatibility with a variety of substrate materials, and can be applied to surface emitting semiconductor lasers to ensure that the laser can still work stably in both single transverse mode and single longitudinal mode when outputting at largearea and high energy.
Owner:INST OF PHYSICS - CHINESE ACAD OF SCI
EGR distribution and fluctuation probe based on co2 measurements
ActiveUS20140034833A1Accurate and fast measurementPromote absorptionRadiation pyrometryColor/spectral properties measurementsLight beamDiagnostic system
A diagnostic system having a laser, an EGR probe, a detector and a processor. The laser may be a swept-λ laser having a sweep range including a significant CO2 feature and substantially zero absorption regions. The sweep range may extend from about 2.708 μm to about 2.7085 μm. The processor may determine CO2 concentration as a function of the detector output signal. The processor may normalize the output signal as a function of the zero absorption regions. The system may include a plurality of EGR probes receiving light from a single laser. The system may include a separate detector for each probe. Alternatively, the system may combine the light returning from the different probes into a composite beam that is measured by a single detector. A unique modulation characteristic may be introduced into each light beam before combination so that the processor can discriminate between them in the composite beam.
Owner:UT BATTELLE LLC
Array type outer cavity adjustable laser adopting passive waveguide gratings
ActiveCN101908716ANarrow channel bandwidthNarrow line widthLaser detailsLaser optical resonator constructionOptical pathOptical amplifier
The invention relates to an array type outer cavity adjustable laser adopting passive waveguide gratings. The array type outer cavity adjustable laser comprises a monomode optical waveguide grating array unit, a second light beam collimation lens, a micro electro mechanical system (MEMS) optical reflector, a first light beam collimation lens, a semiconductor optical amplifier, a laser output assembly and a monomode tail fiber in sequence, wherein the monomode optical waveguide grating array unit provides a plurality of narrow-band high-reflectivity ports with specific wavelengths; the rotatable MEMS optical reflector is used for selecting optical paths connecting between the semiconductor optical amplifier and the narrow-band high-reflectivity ports with the specific wavelengths and realizing the lasing of the laser output assembly under the specific wavelengths; the semiconductor optical amplifier is used for providing resonant cavity gain; the first light beam collimation lens and the second light beam collimation lens are used for realizing the transformation of light beams inside a cavity; and the laser output assembly is used for realizing the reverse isolation of output light and the extraction of output optical signals and outputting the output optical signals to the monomode tail fiber in a coupling way. The invention can realize narrower line widths, larger wavelength covering range, the cooperative control of cavity lengths and centre wavelengths and the selection of multiple resonance wavelengths.
Owner:GUANGXUN SCI & TECH WUHAN
Frequency stabilizing device of semiconductor laser and adjusting method thereof
ActiveCN102593715AAvoid circuit handlingImprove the effect of frequency stabilization and line width suppressionLaser detailsSemiconductor lasersLine widthSaturable absorption
The invention provides a frequency stabilizing device of a semiconductor laser and an adjusting method thereof. The frequency stabilizing device consists of the semiconductor layer, a quarter wave plate, an atomic absorption basin, a half-transparent and half-reflecting mirror, a photoelectric prober, an oscilloscope, an ordinary optical glass and a signal generator. According to the invention, based on the combination of an atomic saturated absorption spectroscopy technology and an incoherent feedback frequency stabilization technology, an output frequency of the semiconductor laser is stabilized at an atomic saturated absorption peak. Therefore, the narrow line width pressure and the stable frequency of the semiconductor laser can be realized simultaneously. The frequency stabilizing device has the characteristics of simple structure and high frequency stability.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
852nm ultra-narrow line width external-cavity semiconductor laser
InactiveCN105529613AEasy alignmentReduce moving partsLaser optical resonator constructionExternal cavity laserBeam splitter
The invention provides an 852nm ultra-narrow line width external-cavity semiconductor laser, which comprises an 852nm laser gain chip, a collimating lens, a rotatable wedge prism pair, a cube beam splitter, a rotatable all-dielectric thin-film fabry-perot light filter, a totally reflecting mirror and a piezoelectric actuator, wherein the collimating lens, the rotatable wedge prism pair, the cube beam splitter, the rotatable all-dielectric thin-film fabry-perot light filter, the totally reflecting mirror and the piezoelectric actuator are sequentially arranged in a light exiting direction of the gain chip; the collimating lens collimates a laser beam and then reflects the laser beam into an external cavity body; the wedge prism pair rotates around an optical axis, so that an incident beam which positively enters the vertical surface of a prism lens deflects; the cube beam splitter outputs one part of light and the other part of light is left in the cavity for oscillation; the fabry-perot light filter can rotate to achieve the target of mode selection for the external cavity; and the totally reflecting mirror can move along the normal direction by combination of the totally reflecting mirror and a PZT. The external-cavity laser can greatly reduce the influence on the frequency caused by mechanical vibration; the mode-hop phenomenon of the laser is avoided; and meanwhile, ultra-narrow line width and linear continuous and adjustable wavelength can be achieved.
Owner:BEIJING UNIV OF TECH
High-power, tunable and narrow linewidth external cavity semiconductor laser
InactiveCN105680320AImprove quality factor Q valueNarrow line widthLaser optical resonator constructionLaser output parameters controlLine widthRefractive index
A high-power, tunable and narrow linewidth external cavity semiconductor laser belongs to the technical field of a semiconductor laser and aims to solve the problem that the comprehensive requirements such as mode characteristic, beam quality, linewidth, coherence and tunability of a single laser are difficult to be met. The high-power, tunable and narrow linewidth external cavity semiconductor laser is formed by directly coupling a gain chip, a tunable external cavity and an inclined power amplifier with a curved waveguide through an end surface, wherein the gain chip is used for achieving laser output of single-mode wide spectrum; the tunable external cavity adopts a silicon on insulator (SOI) material; the linewidth is narrowed by increasing cavity length and a quality factor Q of a laser resonant cavity; the tunability is achieved by the adoption of refractive index of a thermal modulation material; and by the arrangement of the inclined power amplifier with curved waveguide, laser output with high power and high beam quality is achieved under ensuring the stability of the gain chip and the tunable external cavity. By the high-power, tunable and narrow linewidth external cavity semiconductor laser, a novel semiconductor laser integrating a single mode, high power, high beam quality, narrow linewidth, high coherence, tunable wavelength and the like is achieved, and the high-power, tunable and narrow linewidth external cavity semiconductor laser has important application prospect in the fields such as space laser communication and laser radar.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
External cavity widely tunable laser using a silicon resonator and micromechanically adjustable coupling
InactiveUS8908723B2Widely tunableEasy to manufactureLaser optical resonator constructionOptical resonator shape and constructionCouplingLength wave
A widely tunable laser is described where a compound semiconductor gain chip is coupled to a waveguide filter fabricated on silicon. The filter has two resonators with different free-spectral-ranges, such that Vernier tuning between the filters can be used to provide a single wavelength of light feedback into the gain chip, where the wavelength is adjustable over a wide range. The coupling between the gain chip and the filter is realized through a microlens whose position can be adjusted using micromechanics and locked in place.
Owner:T&S COMM
Single-longitudinal-mode optical parametric oscillation amplifier and automatic locking method thereof
InactiveCN103513490ANarrow line widthStable outputExcitation process/apparatusNon-linear opticsAutomatic controlLight wave
The invention provides a single-longitudinal-mode optical parametric oscillation amplifier which is extra narrow in bandwidth, ultra in frequency stabilization, tunable and efficient. An optical parameter laser is a solid laser pump injected with seed light, the oscillator stage is of an annular cavity structure design, continuous stable single-longitudinal-mode seed light is injected, and cavity length mode locking is automatically controlled through programs. The optical parameter laser can output single longitudinal mode lasers with the bandwidth smaller than 200MHz, the energy conversion efficiency is close to 40% to the maximum extent, and the output wave length can cover 430-3500nm (limited by the range of seed light wave length). Stabilization of the wave length of the laser and continuous scanning of wave lengths of the seed light within a limitation of non-mode-jump by controlling a self-feedback system through programs can be achieved.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Distribution feedback external cavity narrow line board semi-conductor laser for achieving frequency self-locking
ActiveCN102709811ARealize frequency self-lockingNarrow line widthLaser detailsLaser optical resonator constructionLine widthSelf locking
The invention discloses a distribution feedback external cavity narrow line board semi-conductor laser for achieving frequency self-locking, which comprises a semi-conductor laser (a), a collimating lens (b), a polarizingprism (c), a first 1 / 4 wave plate (d), an F-P etalon (e), a second 1 / 4 wave plate (f), a front cavity reflector (g), an isolator (h), a focusing lens (f), and an optical fiber (j). The laser disclosed by the invention can effectively narrow the light width of a light source, and achieve the frequency self-locking of the external cavity semi-conductor laser.
Owner:山东中科际联光电集成技术研究院有限公司
Amplification with chalcogenide glass fiber
InactiveUS20030012491A1High enough Raman gainLow enough lossLaser using scattering effectsActive medium materialStimulate raman scatteringStimulated raman
This invention pertains to an optical device and method for using a chalcogenide glass waveguide to amplify a pump light beam by means of stimulated Raman scattering and obtaining a depleted pump light beam and an amplified beam at a wavelength higher than the wavelength of the depleted pump light beam.
Owner:THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com