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42results about How to "Increase cavity length" patented technology
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Structure of an optical interference display cell
A structure of an interference display cell is provided. The cell comprises a first plate and a second plate, wherein a support is located between the first plate and the second plate. The second plate is a deformable and reflective plate. An incident light from one side of the first plate is modulated and only specific frequency light reflects by the second plate. The frequency of the reflected light is related to the distance between the first plate and the second plate. The support has at least one arm. The arm's stress makes the arm hiking upward or downward. The distance between the first plate and the second plate is also changed. Therefore, the frequency of the reflected light is altered.
Owner:SNAPTRACK
Interference display unit
InactiveUS6995890B2Increase brightnessSimple and easy manufacturing processDecorative surface effectsOptical filtersEngineeringHeat treated
An interference display unit with a first electrode, a second electrode and posts located between the two electrodes is provided. The characteristic of the interference display unit is that the second electrode's stress is released through a thermal process. The position of the second electrode is shifted and the distance between the first electrode and the second electrode is therefore defined. A method for fabricating the structure described as follow. A first electrode and a sacrificial layer are sequentially formed on a substrate and at least two openings are formed in the first electrode and the sacrificial layer. A supporter is formed in the opening and the supporter may have at least one arm on the top portion of the supporter. A second electrode is formed on the sacrificial layer and the supporter and a thermal process is performed. Finally, The sacrificial layer is removed.
Owner:SNAPTRACK
Method for fabricating an interference display unit
InactiveUS20050168849A1Increase brightnessSimple and easy manufacturing processMirrorsDecorative surface effectsEngineeringHeat treated
An interference display unit with a first electrode, a second electrode and posts located between the two electrodes is provided. The characteristic of the interference display unit is that the second electrode's stress is released through a thermal process. The position of the second electrode is shifted and the distance between the first electrode and the second electrode is therefore defined. A method for fabricating the structure described as follow. A first electrode and a sacrificial layer are sequentially formed on a substrate and at least two openings are formed in the first electrode and the sacrificial layer. A supporter is formed in the opening and the supporter may have at least one arm on the top portion of the supporter. A second electrode is formed on the sacrificial layer and the supporter and a thermal process is performed. Finally, The sacrificial layer is removed.
Owner:SNAPTRACK
Method for fabricating an interference display unit
InactiveUS7198973B2Increase brightnessSimple and easy manufacturing processPhotomechanical apparatusSemiconductor/solid-state device manufacturingProcess patternsEngineering
A method for fabricating an interference display unit is provided. A first plate and a sacrificial layer are formed in order on a substrate and at least two openings are formed in the first plate and the sacrificial layer. A photoresist layer is spin-coated on the sacrificial layer and fills the openings. A photolithographic process patterns the photoresist layer to define a support with an arm. A second plate is formed on the sacrificial layer and posts. The arm's stress is released through a thermal process. The position of the arm is shifted and the distance between the first plate and the second plate is therefore defined. Finally, The sacrificial layer is removed.
Owner:SNAPTRACK
Method for fabricating an interference display unit
InactiveUS7016095B2Increase brightnessSimple and easy manufacturing processMirrorsDecorative surface effectsEngineeringPosition shift
An interference display unit with a first electrode, a second electrode and posts located between the two electrodes is provided. The characteristic of the interference display unit is that the second electrode's stress is released through a thermal process. The position of the second electrode is shifted and the distance between the first electrode and the second electrode is therefore defined. A method for fabricating the structure described as follow. A first electrode and a sacrificial layer are sequentially formed on a substrate and at least two openings are formed in the first electrode and the sacrificial layer. A supporter is formed in the opening and the supporter may have at least one arm on the top portion of the supporter. A second electrode is formed on the sacrificial layer and the supporter and a thermal process is performed. Finally, The sacrificial layer is removed.
Owner:SNAPTRACK
Laser sensor for self-mixing interferometry with increased detection range
ActiveUS20100134803A1Low cost processingIncrease cavity lengthLaser detailsLaser optical resonator constructionPhotovoltaic detectorsPhotodetector
The present invention relates to a laser sensor for self-mixing interferometry. The laser sensor comprises at least one semiconductor laser light source emitting laser radiation and at least one photodetector (6) monitoring the laser radiation of the laser light source. The laser light source is a VECSEL having a gain medium (3) arranged in a layer structure (15) on a front side of a first end mirror (4), said first end mirror (4) forming an external cavity with an external second end mirror (5). The proposed laser sensor provides an increased detection range and can be manufactured in a low-cost production process.
Owner:TRUMPF PHOTONIC COMPONENTS GMBH
Method and device for stabilizing double-longitudinal mold laser frequency based on thermoelectric cryostat
ActiveCN1983747AImprove anti-interference abilityUnique heat exchange structureLaser detailsResonant cavityOptical power
The invention is concerned with stabilized frequency method and equipment of double longitudinal modes laser based on thermoelectric cooler. The stabilized frequency method is piezoelectric ceramics, and so on. Detect the circumstance temperature T0 of laser to confirm heat balance temperature Tset, start electrical source of laser to test current temperature Treal of laser tube at real time. Adjust countercurrent I according to different value between current temperature Treal and heat balance temperature Tset and heat up laser tube to keep temperature arrive to Tset. Detect optical power Pm and Pm+1of m order and m+1order on the mutual vertical polarization direction to laser and count the different valueDeltP of the two powers. When the temperature of laser tube is near to heat balance temperature Tset, afford forward or counter current to thermoelectric cooler according to the forward or counter to the different valueDeltP, keep the symmetry of two longitudinal mode laser frequency and make the different valueDeltP close to zero, by controlling the temperature of laser tube, the length of resonant cavity and laser longitudinal mode frequency. The two longitudinal mode frequencies are steady, and this product is fit for stabilized frequency.
Owner:HARBIN INST OF TECH
Method and device for stabilizing double-longitudinal mold laser frequency based on thermoelectric cryostat
ActiveCN100382398CTo achieve the purpose of warming upStable output optical frequencyLaser detailsResonant cavityOptical power
The invention is concerned with stabilized frequency method and equipment of double longitudinal modes laser based on thermoelectric cooler. The stabilized frequency method is piezoelectric ceramics, and so on. Detect the circumstance temperature T0 of laser to confirm heat balance temperature Tset, start electrical source of laser to test current temperature Treal of laser tube at real time. Adjust countercurrent I according to different value between current temperature Treal and heat balance temperature Tset and heat up laser tube to keep temperature arrive to Tset. Detect optical power Pm and Pm+1of m order and m+1order on the mutual vertical polarization direction to laser and count the different valueDeltP of the two powers. When the temperature of laser tube is near to heat balance temperature Tset, afford forward or counter current to thermoelectric cooler according to the forward or counter to the different valueDeltP, keep the symmetry of two longitudinal mode laser frequency and make the different valueDeltP close to zero, by controlling the temperature of laser tube, the length of resonant cavity and laser longitudinal mode frequency. The two longitudinal mode frequencies are steady, and this product is fit for stabilized frequency.
Owner:HARBIN INST OF TECH
Continuous wave optical parametric oscillator with pumping resonance
ActiveCN106814516ASmall spot sizeIncrease cavity lengthNon-linear opticsSignal lightBeam collimation
The invention discloses a continuous wave optical parametric oscillator with pumping resonance. The continuous wave optical parametric oscillator with the pumping resonance comprises a single frequency pump laser, a beam collimating unit, a first optical isolator, a pump input coupling mirror, a first concave mirror, a nonlinear crystal, a second concave mirror, a dichroic mirror, an optical band pass wave filter and an OPO signal light output coupling mirror. According to the continuous wave optical parametric oscillator, the non-linear crystal is directly placed between the two concave mirrors, and a smaller signal and a spot area of the pump light can be obtained by selecting the concave mirror with short focal length; the cavity length of the signal cavity and the pumping cavity is increased with a folded resonator. Therefore, the spot area of the signal and pump light in the non-linear crystal can be further reduced, and the extremely low oscillation threshold is realized, wherein the oscillation threshold value can be less than 60 MW, or even less than 30 MW. The continuous wave optical parametric oscillator with a low threshold value has the advantages of reducing the power requirement of the pump laser, being relatively simple in structure, and easy to realize miniaturization and practicability.
Owner:HUAZHONG UNIV OF SCI & TECH
Intra-cavity second harmonic generation (SHG) laser device
ActiveUS20120051375A1Good spectral selectivityIncrease cavity lengthOptical resonator shape and constructionSelective reflectionOptoelectronics
A laser device for intra-cavity frequency conversion, in particular, for the second harmonic generation, the device comprising a laser cavity, formed by the first and the second laser cavity end reflectors wherein the said laser cavity end reflectors are highly reflective for the radiation about the laser fundamental frequency and as such provide for a predetermined level of circulating inside the cavity fundamental frequency power; an active medium provided within the said laser cavity; at least one non-linear crystal, in particular, for the second harmonic generation provided within the same laser cavity; tuning means adapted for tuning at least one of laser cavity end reflectors; wherein at least one of the laser cavity end reflectors comprises an interferometric layout providing spectrally selective reflection for the radiation about the laser fundamental frequency with the value of reflectivity nearly to 100% within a spectral range close to the free spectrum range of the laser cavity and with a sufficiently lower reflectivity outside the above spectral range such that the laser cavity restricts the spectrum of the laser radiation to a single longitudinal mode.
Owner:UNIKLASERS
FP (Fabry-Perot) barometric sensor based on gas-sensitive film in an optical fiber and preparation method thereof
ActiveCN113029428AIncrease cavity lengthHigh measurement sensitivityFluid pressure measurement by optical meansRefractive indexGas pressure transducer
The invention discloses an FP (Fabry-Perot) barometric sensor based on a gas-sensitive film in an optical fiber. The FP barometric sensor comprises a single-mode optical fiber and a quartz capillary optical fiber, One end of the quartz capillary optical fiber is connected with the single-mode optical fiber, and the other end of the quartz capillary optical fiber is a sealed end; a gas sensitive film is arranged in the quartz capillary optical fiber, and an air hole is formed in one side of the quartz capillary optical fiber between the gas sensitive film and the single-mode optical fiber to form an FP air cavity; and a sealing cavity is formed between the gas sensitive film and the sealing end. The cavity length of the optical fiber FP air cavity of the sensor and the refractive index of gas in the cavity are sensitive to air pressure at the same time, the sensor is small in size and high in sensitivity, and the preparation method is simple and easy to implement and low in cost.
Owner:WUHAN UNIV OF TECH
Terahertz-Band Optical Filter, Designing Method Thereof, and Manufacturing Method Thereof
InactiveUS20080252979A1Improving Impedance MatchingIncrease cavity lengthCoatingsSpecial surfacesRefractive indexOptical pathlength
A terahertz band optical filter having a dielectric multilayer periodic structure in which a plurality of dielectric materials are periodically layered. Multi-cavity layers each having an optical path length of n times λ / 2 (n is an integer greater than or equal to 1) and made of a low-refractive index medium are arranged. The cavity layers are coupled using a single-layer coupling layer having an optical path length λ / 4 and made of a high-refractive index medium, thus forming a multi-cavity structure. Matching layers each including a high refractive index layer and a low refractive index layer each having an optical path length of λ / 4 are disposed at either end of the multi-cavity structure.
Owner:MURATA MFG CO LTD
External cavity tunable laser and wavelength tuning method
InactiveCN110112652AQuick tuneFor fine tuningLaser detailsLaser optical resonator constructionGratingBlazed grating
The invention provides an external cavity tunable laser and a wavelength tuning method, and belongs to the technical field of lasers. The external cavity tunable laser comprises a semiconductor gain chip, a first collimating lens, a blazed grating and a reflector opposite to the blazed grating, wherein the semiconductor gain chip, the first collimating lens and the blazed grating are located on the same optical axis, and an included angle larger than 0 exists between the grating plane of the blazed grating and the optical axis. The semiconductor gain chip sequentially comprises a sampling grating region, a phase modulation region, a gain region, and a first electrode, a second electrode and a third electrode which respectively cover the sampling grating region, the phase modulation regionand the gain region from left to right. The blazed grating and the reflector are fixed on an electric or manual control mechanical structure. According to the invention, the large-range, rapid and fine tuning of the wavelength by the laser is realized, and the output wavelength can be narrowed.
Owner:INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
Optical fiber humidity sensor with ultrahigh sensitivity and based on all-agar F-P cavity
ActiveCN106290170AHygroscopicModification of optical path differencePhase-affecting property measurementsColor/spectral properties measurementsOptical propertySize change
The invention provides an optical fiber humidity sensor with ultrahigh sensitivity and based on an all-agar F-P cavity and a manufacturing method of the optical fiber humidity sensor. The sensor comprises a leading-in optical fiber and the humidity-sensitive agar F-P cavity composed of an agar colloid. The leading-in optical fiber and the agar F-P cavity are directly connected through an end face dipping method, the leading-in optical fiber is used for leading in a light source signal and transmitting reflected light, and the agar F-P cavity is used for sensing humidity changes in the environment. The agar colloid has hygroscopicity because the surface of the agar colloid contains a large number of hydrophilic groups, the agar colloid can expand when absorbing water and shrink when losing water, and the refractive index and size change at the same time. Changes of the refractive index and thickness of an agar film are fully utilized for manufacturing the sensor, the ultra-short agar F-P cavity can be used as a sensing unit, and therefore ultrahigh sensitivity is obtained. Besides, agar powder is cheap, easy to obtain and easy to dissolve in hot water, the cooled colloid is stable in optical property, the coating process is quite simple, a complicated operation process and expensive equipment are not needed, and the manufacturing cost of the sensor can be lowered.
Owner:HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
Laser sensor for self-mixing interferometry having a vertical external cavity surface emission laser (VECSEL) as the light source
ActiveUS9397476B2Low cost processingIncrease cavity lengthLaser detailsLaser optical resonator constructionVertical-cavity surface-emitting laserPhotovoltaic detectors
The present invention relates to a laser sensor for self-mixing interferometry. The laser sensor comprises at least one semiconductor laser light source emitting laser radiation and at least one photodetector (6) monitoring the laser radiation of the laser light source. The laser light source is a VECSEL having a gain medium (3) arranged in a layer structure (15) on a front side of a first end mirror (4), said first end mirror (4) forming an external cavity with an external second end mirror (5). The proposed laser sensor provides an increased detection range and can be manufactured in a low-cost production process.
Owner:TRUMPF PHOTONIC COMPONENTS GMBH
In-cavity pump light parameter oscillator with fiber laser as pumping source
ActiveCN106816807ALower Oscillation ThresholdImprove power conversion efficiencyLaser detailsNonlinear crystalsPopulation inversion
The invention discloses an in-cavity pump light parameter oscillator with a fiber laser as a pumping source. A pumping source emits in-band laser which is absorbed by a single mode gain fiber, the laser enters the single mode gain fiber via a pump combiner to form population inversion, and laser oscillation is formed in a fiber laser resonant cavity. A non-linear crystal is arranged in the fiber laser resonant cavity, and the in-cavity oscillation laser passes through the non-linear crystal to generate OPO signal light and an OPO idle light. A resonant cavity of the OPO signal light is partially overlapped with the fiber laser resonant cavity, so that the OPO oscillator threshold can be effectively reduced and the power conversion efficiency is improved. The non-linear crystal is arranged between a pair of curved surface mirrors, and an output coupling mirror and a high reflection mirror are used to enhance the cavity length of the OPO signal cavity, so that the light spot area of the OPO signal and the pump light in the non-linear crystal is reduced, and the OPO oscillator threshold is further reduced. Therefore, the OPO oscillator threshold is effectively reduced, the OPO power conversion efficiency is improved, and the structure is simple.
Owner:HUAZHONG UNIV OF SCI & TECH
Large-cavity length micro-electro-mechanical tunable fabry-perot filter
ActiveCN104330890ARealize low voltage driveReduce difficultyOptical elementsCorrosionOptical communication
The invention provides a large-cavity length micro-electro-mechanical tunable fabry-perot filter. The upper substrate of the filter is composed of bulk silicon of which the section is W-shaped after double-sided corrosion and a rich boron-doped layer on the lower surface of the bulk silicon; the upper surface of the W-shaped bulk silicon is provided with a transparent thin film as a supporting film; a reflecting film on the supporting film serves as the front cavity mirror of the fabry-perot filter; the rich boron-doped layer in different regions of the lower surface of the W-shaped bulk silicon is capable of serving as a cantilever beam and an upper electrode, respectively. The lower substrate of the filter is made of quartz glass; a rear cavity mirror and a lower electrode are fabricated on the upper surface of the lower substrate in regions corresponding to the front cavity mirror and the upper electrode; a diffraction grating is carved in the region, corresponding to the rear cavity mirror, of the lower surface of the lower substrate. The micro-electro-mechanical filter is capable of obtaining the initial cavity length of more than 200 microns conveniently and capable of realizing single wavelength filtering in different directions, has the advantages of narrow half-peak overall width and wide free spectral range, and has wide application prospect in the fields of optical communication, optical information reading, laser technology and the like.
Owner:山东佳联电子商务有限公司
Top-emitting woled display device
ActiveUS20190006627A1The production process is simpleReduce energy couplingSolid-state devicesSemiconductor/solid-state device manufacturingGamutDisplay device
Disclosed is a top-emitting WOLED display device. An optical turning layer with a uniform thickness is added between anode layers of three sub-pixels R, G and B and a reflective metal layer of the display device. Because of arrangement of the optical turning layer, a distance between a WOLED layer and a reflective metal layer is increased. Thus, a total cavity length of a white OLED is increased, and a microcavity effect of a top-emitting WOLED is overcome. The optical turning layer is suitable for manufacture of AMOLED display devices with high-resolution and color gamut.
Owner:SHENZHEN CHINA STAR OPTOELECTRONICS TECH CO LTD
Narrow-linewidth tunable laser device and preparation method thereof
The invention discloses a narrow-linewidth tunable laser device and a preparation method thereof. A laser chip sequentially comprises a substrate layer, a lower waveguide layer and an upper waveguidelayer from bottom to top, wherein the lower waveguide layer and the upper waveguide layer are positioned on different planes and perform optical energy exchange through vertical coupling, the lower waveguide layer is provided with an active gain waveguide and a lower-layer passive waveguide which are connected in a butt joint mode, the lower-layer passive waveguide is provided with a plurality ofbent waveguides to prolong the cavity length, the upper waveguide layer is provided with an upper-layer passive waveguide and a micro-ring reflector, the upper-layer passive waveguide and the lower-layer passive waveguide are vertically coupled through a coupler, the micro-ring reflector is coupled with the upper-layer passive waveguide, and the upper-layer passive waveguide is provided with a plurality of bent waveguides to prolong the cavity length. The narrow-linewidth tunable laser device is small in laser chip size, tunable, narrow in linewidth, low in cost and high in stability.
Owner:武汉敏芯半导体股份有限公司
Epitaxial integrated dielectric film distributed bragg reflector (DBR) external cavity surface emitting laser
InactiveCN112838474AMitigation mismatchIncrease cavity lengthLaser detailsLaser optical resonator constructionVertical-cavity surface-emitting laserDielectric
The invention discloses an epitaxial integrated dielectric film DBR external cavity surface emitting laser. The laser comprises a P-type metal electrode layer, a passivation layer, an upper distributed Bragg reflector growing periodically and alternately, an oxidation limiting layer with a high aluminum component, an active region, a lower distributed Bragg reflector growing periodically, a GaAs substrate layer, an N-type metal electrode layer, a current limiting oxidation hole, a phase matching layer, a cavity length matching layer, a silicon oxide and silicon nitride dielectric film distributed Bragg reflector and a light emitting hole; and the inherent cavity length of the vertical cavity surface emitting laser is prolonged by adopting a method of growing a phase matching layer and a cavity length matching layer, and the silicon oxide silicon nitride dielectric film distributed Bragg reflector is extended by adopting an inductively coupled plasma enhanced vapor deposition method, so that the purposes of controlling light polarization and narrowing line width are achieved. The threshold value of the semiconductor laser is reduced, and the yield of the device is improved.
Owner:BEIJING UNIV OF TECH
Human eye safety laser ranging machine and method
ActiveCN112799089AQuality assuranceMaintain divergenceOptical rangefindersElectromagnetic wave reradiationBeam splitterAcousto-optics
The invention provides a human eye safety laser ranging machine and method. The human eye safety laser ranging machine is simple to operate, small in size, high in test precision and capable of outputting band laser safe to human eyes. The human eye safety laser ranging machine comprises a laser and a detector; the laser comprises a light source, erbium glass and a first reflector and a second reflector; the first reflector and the second reflector are arranged at the light emitting end of the erbium glass; the included angle between the normal of the first reflector and the second reflector and the normal of the light emitting surface of the erbium glass is a Brewster angle; the first reflector, the second reflector and the erbium glass form a V-shaped resonant cavity; light emitted by the light source enters the erbium glass and then is emitted from the first reflector and the second reflector; and the light emitted from the first reflector sequentially passes through a first total reflection mirror, an acous to-optic frequency shifter, a first beam splitter and the detector; the light emitted from the second reflector sequentially passes through a second total reflection mirror, a Q-switched crystal, a Faraday optical rotation isolator, a second beam splitter, a third beam splitter and a telescopic system and then is emitted to a to-be-detected target; and light scattered or reflected by the to-be-detected target sequentially passes through the third beam splitter, the second beam splitter and the first beam splitter and then enters the detector.
Owner:苏州同人激光科技有限公司
Method for preparing vertical cavity laser by transferring perovskite thin film
PendingCN114583553AIncreasing the thicknessIncrease cavity lengthLiquid surface applicatorsLaser detailsMaterials scienceVertical cavity lasers
The invention provides a method for preparing a vertical cavity laser through perovskite film transfer, and belongs to the technical field of lasers. According to the invention, the hydrophilic flexible substrate is utilized to perform physical and mechanical transfer on the perovskite polycrystalline thin film, the transfer thin film is large in area and high in flatness, and the thickness of the perovskite polycrystalline thin film between DBR reflector substrates can be increased, so that the cavity length of the vertical cavity laser is increased. According to the method, the hydrophilic flexible substrate is adopted to perform physical and mechanical transfer on the perovskite polycrystalline film, so that the surface appearance and the optical property of the perovskite polycrystalline film are not changed, optical loss is not additionally introduced, and the problem that low-solubility perovskite cannot meet the length of an optical resonant cavity due to too small film thickness can be solved; and the application of the device in the laser field is expanded. Meanwhile, the method provided by the invention is simple to operate, low in cost and easy to realize industrial batch production.
Owner:PEKING UNIV
Laser sensor for self-mixing interferometry having a vertical external cavity surface emission laser (vecsel) as the light source
ActiveUS20160290785A1Low cost processingIncrease cavity lengthLaser detailsLaser optical resonator constructionPhotovoltaic detectorsPhotodetector
The present invention relates to a laser sensor for self-mixing interferometry. The laser sensor comprises at least one semiconductor laser light source emitting laser radiation and at least one photodetector (6) monitoring the laser radiation of the laser light source. The laser light source is a VECSEL having a gain medium (3) arranged in a layer structure (15) on a front side of a first end mirror (4), said first end mirror (4) forming an external cavity with an external second end mirror (5). The proposed laser sensor provides an increased detection range and can be manufactured in a low-cost production process.
Owner:TRUMPF PHOTONIC COMPONENTS GMBH
A Pump Resonant Continuous Wave Optical Parametric Oscillator
ActiveCN106814516BSmall spot sizeIncrease cavity lengthNon-linear opticsSignal lightNonlinear crystals
Owner:HUAZHONG UNIV OF SCI & TECH
A membrane-type high-precision Fabry-Perot fiber optic acceleration sensor based on fiber Bragg gratings
ActiveCN105242067BGood repeatability of cavity length processingImprove parallelismAcceleration measurementFinesseAccelerometer
An FBG-based diaphragm type high-precision F-P optical fiber acceleration sensor belongs to the technical field of optical fiber sensors. The present invention aims to solve the defects existing in the traditional F-P sensor. Write the FBG in the optical fiber, the sensitive diaphragm, the collimating lens facing the exit end of the optical fiber, the pigtailed sleeve, the optical fiber, and the sleeve; the sensitive diaphragm is set on one end of the sleeve, and the collimating lens and the sleeve are fixed inside the sleeve. With a pigtail sleeve, the pigtail with a pigtail sleeve passes through the other end of the sleeve to connect with the optical fiber, and a raised mass block is set in the middle of the sensitive diaphragm; FBG and the end face of the raised mass block on the sensitive diaphragm constitute A pair of mirrors in the F‑P cavity; the FBG to the fiber exit end face, the collimator lens, and the air cavity from the collimator lens to the raised mass together form the cavity length of the F‑P. The sensitive diaphragm makes the optical fiber sensor have very high sensitivity. The output signal of the sensor is demodulated by phase demodulation method, which has strong anti-interference ability to temperature changes and laser wavelength drift.
Owner:HARBIN INST OF TECH
Single photon source
InactiveUS7888692B2Easy to makeIncrease cavity lengthSemiconductor lasersSemiconductor devicesSemiconductor quantum wellsPolaron
Microcavity comprising two reflectors, at least one semiconductor layer separating said reflectors and a semiconductor quantum well wherein at least one of said reflectors and of said at least one semiconductor layer comprises a structure which is adjusted to localize a polariton in said microcavity.
Owner:ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)
An anti-detuning long-pulse-width pyramid-cavity solid-state laser
The invention relates to an anti-detuning long-pulse-width corner-cone cavity solid-state laser. In the structure of the laser, four corner-cone prisms are used to form a ring resonator. One of the wave plates makes the intracavity oscillating beam repeatedly reflected between the four corner cubes, which can significantly increase the cavity length of the resonator under the same laser volume, and at the same time ensure the anti-detuning characteristics of the laser resonator.
Owner:NANJING UNIV OF INFORMATION SCI & TECH
Novel folding cavity laser device with opposed right-angle prisms
PendingCN110649453AIncrease cavity lengthAchieve adjustmentOptical resonator shape and constructionErbium lasersPrism
The invention relates to a novel folding cavity laser device with opposed right-angle prisms. By utilizing the reflection characteristic of the opposite right-angle prisms, resonance light beams are reflected back and forth between the two right-angle prisms, and the cavity length of a resonance cavity can be effectively increased. The laser device is advantaged in that the cavity length can be remarkably increased in the small space, moreover, the cavity length of the laser device can be greatly adjusted by adjusting a distance between the right-angle prisms so that adjustment of part of laser parameters is realized.
Owner:HUBEI JIUZHIYANG INFRARED SYST CO LTD
Light-emitting device and display device
PendingCN108123053AImprove performanceIncrease cavity lengthSolid-state devicesSemiconductor/solid-state device manufacturingResonant cavityDisplay device
The invention provides a light-emitting device and a display device. The light-emitting device includes a substrate, and a group including an active layer, a gate layer, a source and drain layer, a first electrode layer, an organic material layer, and a second electrode layer and disposed over the substrate. The organic material layer is located between the first electrode layer and the second electrode layer. The second electrode layer is located on a side of the first electrode layer away from the substrate. The first electrode layer is located at a side of the source and drain layer away from the substrate. The first electrode layer and the source and drain layer are disposed correspondingly. The width of the source and drain layer is greater than or equal to the width of the first electrode layer. A resonant cavity is formed between the source and drain layer and the second electrode layer. The light-emitting device and the display device increase the length of the resonant cavityand weaken a resonant cavity effect, thereby achieving wide-spectrum emission and improving the performance of the light-emitting device.
Owner:BOE TECH GRP CO LTD
A Corner Cube Folded Cavity Laser
ActiveCN110600979BIncrease cavity lengthSimple structureOptical resonator shape and constructionResonant cavityLight beam
The invention is a novel folded cavity laser with opposed corner cubes, which utilizes the reflection characteristics of the opposed corner cubes to make resonant beams reflect back and forth between the two corner cubes, which can effectively increase the cavity length of the resonant cavity; the invention The laser can significantly increase the cavity length in a small space, while ensuring the anti-offset characteristics of the laser resonator.
Owner:HUBEI JIUZHIYANG INFRARED SYST CO LTD
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