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38 results about "Ti:sapphire laser" patented technology
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Ti:sapphire lasers (also known as Ti:Al₂O₃ lasers, titanium-sapphire lasers, or Ti:sapphs) are tunable lasers which emit red and near-infrared light in the range from 650 to 1100 nanometers. These lasers are mainly used in scientific research because of their tunability and their ability to generate ultrashort pulses. Lasers based on Ti:sapphire were first constructed and invented in June 1982 by Peter Moulton at the MIT Lincoln Laboratory.
Intracavity-frequency-multiplication-optic-parameter-oscillator-based femto-second near-infrared laser light source and method
InactiveCN104852266AIncrease output powerCompact structureLaser detailsAll solid stateNear infrared laser
The invention discloses an intracavity-frequency-multiplication-optic-parameter-oscillator-based femto-second near-infrared laser light source and a method. The light source comprises an all-solid-state femto-second mode-locking Yb laser, an isolator, a half-wave plate, a focusing lens, a first concave mirror, a first PPLN crystal, a second concave mirror, a three concave mirror, a second PPLN crystal, a fourth concave mirror, and an output coupling mirror, wherein the units are successive placed. According to the invention, advantages of high output power, compact structure, and low cost of the all-solid-state femto-second mode-locking Yb laser are used for realizing coherent femto-second near-infrared laser with continuous tunable wavelengths from 1.4 to 1.8 microns and 0.7 to 0.9 microns. Compared with the traditional mode-locking-titanium-sapphire laser generating a near-infrared laser light source with the wavelength from 0.7 to 0.9 microns, the provided intracavity-frequency-multiplication-optic-parameter-oscillator-based femto-second near-infrared laser light source has advantages of simple structure, stable performance, and low price and the like.
Owner:XIDIAN UNIV +1
Continuous tunable single-frequency ti sapphire laser based on locking of electro-optical etalon of internal cavity
The invention provides a continuous tunable single-frequency ti sapphire laser based on locking of an electro-optical etalon of an internal cavity. The laser comprises a pumping source, a ti sapphire crystal, a laser resonator, an optical isolator, a double-refraction filter plate, the electro-optical etalon, a vibrating mirror motor, piezoelectric ceramics, a beam splitting mirror, a photoelectric detector, a servo controller, a high-voltage driver and a signal generator; the light field in the cavity is modulated by utilizing a photoelectric effect of the electro-optical etalon, and the photoelectric detector detects and extracts error signals; and the electro-optical etalon is mounted on the vibrating mirror motor, the vibrating mirror motor is used to control the angle of the electro-optical etalon, and the electro-optical etalon is locked in real time. According to the invention, the light field in the cavity is modulated by utilizing the photoelectric effect of the electro-optical etalon, the photoelectric detector detects and extracts error signals and enables the vibrating mirror motor to control the angle of the electro-optical etalon, the transmission peak of the etalon is locked in the laser oscillation frequency in real time, and the cavity length of the laser resonant cavity is changed to realize continuous tuning of the laser frequency.
Owner:SHANXI UNIV
Semiconductor laser-pumped kerr lens mode-locked titanium sapphire laser
ActiveCN107565360AStable offset frequencyImprove pumping efficiencyLaser detailsFrequency stabilizationCarrier signal
The invention discloses a semiconductor laser-pumped kerr lens mode-locked titanium sapphire laser, which comprises first semiconductor lasers, a resonant cavity, an interferometer and a feedback regulation unit, wherein the first semiconductor lasers are used for emitting continuous laser light of blue and green bands to pump titanium sapphire crystal in the resonant cavity; the resonant cavity is used for carrying out oscillating and mode locking on the laser light of near-infrared bands to output femtosecond pulse laser light; the interferometer is used for driving the femtosecond pulse laser light to generate a beat note signal to obtain a carrier-envelope offset frequency; and the feedback regulation unit is used for regulating front and back positions and gradients of end mirrors ofthe resonant cavity and the power of the laser light output by the semiconductor lasers, thereby keeping the stability of a repetition frequency and the carrier-envelope offset frequency. An ultrashort laser light pulse with stable repetition frequency and carrier-envelope offset frequency can be output, and the semiconductor lasers are directly adopted as pumping sources, so that the cost of thelasers is greatly reduced, and the volume of the whole lasers is further reduced.
Owner:HUAZHONG UNIV OF SCI & TECH
Multi-mode quantum light source realization device based on four-wave mixing process in rubidium vapor
InactiveCN105116663AIntensity difference Low noiseAvoid influenceNon-linear opticsFrequency spectrumGlan–Thompson prism
The invention discloses a multi-mode quantum light source realization device based on a four-wave mixing process in rubidium vapor. Laser emitted by a titanium sapphire laser device sequentially passes through a 1 / 2 wave plate and a polarization beam splitter and then is divided into a first laser beam and a second laser beam; the first laser beam is sequentially emitted into an acoustic optical modulator and a 1 / 4 wave plate and then is sequentially reflected back to the acoustic optical modulator, and passes through a single-mode optical fiber to generate probe light; the second laser beam sequentially passes through the single-mode optical fiber, the 1 / 2 wave plate, the polarization beam splitter, the 1 / 4 wave plate and a conical prism to generate pumping light; the probe light and the pumping light are subjected to a four-wave mixing reaction in a rubidium tank to generate conjugate light; the pumping light is eliminated by a Glan-Thompson prism and the probe light penetrates through a punching reflection mirror; the conjugate light is reflected by the punching reflection mirror; the probe light and the conjugate light are input into different detectors respectively, and electric signals output by the detectors pass through a subtractor and then are connected to a frequency spectrum analyzer, and then are analyzed to obtain quantum squeezing. With the adoption of the multi-mode quantum light source realization device, an ultra-large-size multi-mode quantum state is realized by using degree of spatial freedom.
Owner:EAST CHINA NORMAL UNIV
Tunable titanium jewelry laser of 588nm yellow light pump
InactiveCN102244345AImprove efficiencyReduce cooling requirementsLaser detailsFiberTi:sapphire laser
The invention discloses a tunable titanium jewelry laser of a 588nm yellow light pump. The laser is characterized in that a pump light is emitted by a 808nm or 880nm laser diode pump source; the pump light are focused at the interior of an Nd:YVO4 crystal through a transmitting energy fiber and a coupling lens, population inversion is carried out, and a laser with the wavelength of 1064nm is generated under the effect of a resonant cavity composed of a resonant cavity reflector and a yellow light output lens; one-order strokes with the wavelength of 1176nm are generated when the intensity exceeds the Roman threshold value; a 588nm yellow light is generated under the effect of a yellow light frequency doubling crystal, the yellow light is focused in a titanium jewelry crystal through a coupling focus lens, pumping is carried out on the titanium jewelry crystal, and population inversion is carried out, thus generating a spontaneous radiation photon; and titanium jewelry laser oscillation is formed under the effect of the titanium jewelry laser resonant cavity composed of a titanium jewelry laser full reflection lens and an output lens, and the tunable output of the wavelength is realized through regulating the horizontal direction angle of the titanium jewelry laser full reflection lens under the effect of a dispersion element.
Owner:TIANJIN UNIV
Femtosecond laser plasma channel length measuring device and method
InactiveCN105698687AEasy to operateAccurate measurementUsing optical meansMeasurement deviceFilamentation
The invention provides a femtosecond laser plasma channel length measuring device and method. The device includes a Ti sapphire laser, a focusing lens, a metal Faraday cage, a light beam collecting device, a high voltage power source, an organic glass substrate, an insulation plastic rod, a metal conical electrode and a digital camera. According to the invention, femtosecond laser filamentation is utilized for inducing corona discharge, the inner ionization degree of a femtosecond laser plasma channel is intensified by using an electric field, so that a weak ionization area which is not easy to detect becomes easy to detect under the effect of the electric field. Besides, the digital camera is used for taking fluorescent pictures showing that laser induces corona discharge, so that precise measurement of the femtosecond laser plasma channel is realized. The device is simple and practical and can be used for measuring the length of the femtosecond laser plasma channel directly. The method which is more accurate, simple and convenient is provided for femtosecond laser plasma length measurement.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Nd YCOB crystal micro lens self-doubled frequency green laser
InactiveCN101237119AEasy to implementSimple manufacturing processOptical resonator shape and constructionActive medium materialNon-linear effectsTi:sapphire laser
The invention provides a Nd:YCOB crystal micro-disc self-doubling-frequency green laser, belonging to the element field. The Nd:YCOB crystal has the nonlinear effect and has a general expression of Ndxy(1-x)Ca4o(BO3)3, where x ranges from 0.001 to 0.2. The crystal takes the YCOB as the ground mass and takes an LD or a Ti:sapphire laser as a pump source; the crystal makes Nd ions to generate the laser oscillation with 1.06 mu m and generates green output by the YCOB crystal nonlinear effect. The micro-disc self-doubling-frequency green element made of the crystal has the characteristics of simple and compact structure, small volume, small consumption, good stability, high transfer efficiency, good beam quality, simple operation, low cost, etc. Moreover, the laser can realize the miniaturization, the integration and the practicability and is convenient for the industrialized mass production.
Owner:SHANDONG UNIV
Transmission cavity frequency stabilizing system and method for realizing long-term laser frequency stabilization
ActiveCN104953459AStable constrictionFrequency stabilityLaser detailsFrequency stabilizationTi doping
The invention discloses a transmission cavity frequency stabilizing system and method for realizing long-term laser frequency stabilization and belongs to the field of precise laser frequency stabilization. The frequency stabilizing system mainly comprises a plurality of Ti-doped sapphire lasers, reference cavities, control boxes, a reference laser (helium-noon laser) with stable frequency, a polarization beam splitter, a Fabry-Perot transmission cavity, a photoelectric detector, a function signal generator, an adder, a data acquisition card, a computer and the like. The frequency stabilizing method comprises steps as follows: firstly, two Ti-doped sapphire lasers are locked on the respective reference cavities, and then the reference cavities are locked on the reference laser with stable frequency, so that two Ti-doped sapphire lasers with laser line width smaller than 100 kHz and long-term frequency drift smaller than plus / minus 1 MHz are obtained. The system and the method have the advantages that only one reference laser is used for locking the plurality of Ti-doped sapphire lasers with frequency to be stabilized simultaneously and can lock the Ti-doped sapphire lasers at any frequency within the tunable range, and the extensibility and the frequency stability are very high.
Owner:EAST CHINA NORMAL UNIV
Thulium and holmium codoping gallium acid barium and lanthanum laser crystal, manufacturing method and application of crystal
InactiveCN105821478AEfficient outputImprove laser output efficiencyPolycrystalline material growthBy pulling from meltSpace groupLanthanum
A thulium holmium co-doped barium lanthanum gallate laser crystal, manufacturing method and application thereof, the chemical formula of the crystal is: Tm, Ho: BaLaGa 3 o 7 , belonging to the tetragonal crystal system, the space group is The crystals are based on BaCO 3 , La 2 o 3 , Ga 2 o 3 , Tm 2 o 3 and Ho 2 o 3 The raw material is grown according to the pulling method, and the crystal is used in a solid-state laser as a laser working substance, and a laser diode or a Ti:sapphire laser is used as a pump source to generate continuous, tunable and ultrashort pulse laser output in the 2μm band. Thereby realizing 2μm band laser emission.
Owner:NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI +1
765nm-780nm pulse laser for raman spectrum analysis
InactiveCN101771238AFlexible adjustmentSmall sizeLaser using scattering effectsActive medium shape and constructionSpectrum analyzerFundamental frequency
The invention relates to a 765nm-780nm pulse laser for Raman spectrum analysis, comprising a 980nm laser diode (101) and an end face pumping laser gain medium (103), a resonant cavity is composed of a reflecting mirror (102) and an output mirror (105), 1520nm-1560nm fundamental frequency light is generated and carries out resonance in the resonant cavity through a frequency doubling crystal (104), pulse laser (109) with 760nm-780nm wavelength is output, and the needed wavelength (110) is output through an pulse laser coupling system (106). In the invention, laser glass is used as laser gain medium, the stability of the laser is improved, the price is low, and the price of the whole system is only one fifth of that of the traditional Ti-sapphire laser, and the laser is mainly used for the low-power portable Raman spectrum analyzers.
Owner:FUJIAN CASTECH CRYSTALS
Broadband Ti:sapphire tunable Raman laser
ActiveCN103427327APlay a role in frequency shiftContinuously tunable wavelengthActive medium materialAcousto-opticsWavelength
The invention provides a broadbandTi:sapphire tunable Raman laser. According to the broadband Ti:sapphire tunable Raman laser, a green laser is composed of a laser total-reflection mirror, an acousto-optic Q switch, a semiconductor laser module, a harmonic wave sheet, a frequency doubling crystal and a green laser output mirror. An LDA pump laser gain material is used for generating 1064mm laser. A 532mm laser is generated through the frequency doubling crystal. Pumping is conducted by the 532mm laser on a Ti:sapphire crystal, so that 1000nm-1100nm wave length is generated. A Raman reflecting mirror and a Raman output mirror constitute a resonance cavity. The laser generates simulated Raman scattering under the feedback action of the resonance cavity after passing through a Raman crystal. Through selection of a prism pair and a reflecting mirror, the wave length continuous tunable function is achieved. After the laser passes through the Raman crystal, due to the Raman effect, the frequency shift function is achieved. Finally, long wave length beyond the spectral line of emission of the Ti:sapphire laser is output. The broadband Ti:sapphire tunable Raman laser expands the output wave length range of the Ti:sapphire laser.
Owner:LASER TECH TIANJIN MAIMAN
Asymmetric quantum interferometer and method
ActiveCN109596043AReduce noiseReduce processing complexityOptical measurementsUsing optical meansBeam splitterPhase difference
The invention discloses an asymmetric quantum interferometer and method. Coherent light such as a semiconductor laser or a titanium sapphire laser is used as an initial incident light source, and theasymmetric quantum interferometer is realized based on a high-gain raman scattering process between the light and a substance. An experimental device is mainly an action medium and comprises two coherent light sources P, a raman light field W, a batch of optical components and a phase shifter. The whole device is simple in structure and stable in system. According to the asymmetric quantum interferometer in the invention, the high-gain raman scattering process is used as a beam splitter to realize beam splitting and beam combination of light and atoms, the interference output strength is in asymmetric and similar sawtooth wave pattern distribution along with the phase difference of two interference arms, and the signal strength at certain phases is very sensitive to phase change. Comparedwith the traditional all-optical interferometer and the symmetric nonlinear interferometer, the asymmetric quantum interferometer has higher phase sensitivity. The interferometer has an important application prospect in the field of precision measurement and quantum information.
Owner:EAST CHINA NORMAL UNIV
Single-frequency continuous wave all-solid-state Ti sapphire laser for realizing automatic broad tuning and method thereof
The invention relates to a single-frequency continuous wave all-solid-state Ti sapphire laser for realizing automatic broad tuning and a method thereof. The invention aims to settle technical problems of tedious operation, narrow tuning range and low tuning precision in an existing tunable Ti sapphire laser and the tuning method thereof. The single-frequency continuous wave all-solid-state Ti sapphire laser for realizing automatic broad tuning is characterized by comprising a pumping source, a Ti sapphire crystal, a four-lens ring laser resonator, a broadband optical isolator, a birefringence wave filter, an electric-optical standard member, a coupling system, a beam splitter mirror, a wavemeter, a computer, a piezoelectric controller and a piezoelectric rotating motor. According to the single-frequency continuous wave all-solid-state Ti sapphire laser and the method, a Labview automatic control program is used for realizing automatic tuning for output wavelength of the Ti sapphire laser; and an automatic broad tuning device can realize tuning for output wavelength of the all-solid-state continuous single-frequency Ti sapphire laser through setting a target wavelength on a control interface, thereby realizing no requirement for a tedious and complicated operation process and greatly reducing error rate in manual operation.
Owner:SHANXI UNIV
10MHz-10GHz optical phase-locked loop device
ActiveCN108196412AAchieve lockingSimple and fast operationPulse automatic controlPhotonic quantum communicationBeam splitterSpectrum analyzer
The invention relates to the field of optical phase-locked loops and provides a 10MHz-10GHz optical phase-locked loop device. The device includes a titanium-doped sapphire laser (1), a semiconductor laser (2), a high-bandwidth photoelectric detector (3), a radio frequency power beam splitter (4), a spectrum analyzer (5), a high-frequency signal generator (6), a frequency mixer (7), a radio frequency power amplifier (8), a signal generator (9), an optical phase-locked loop module (10), and an oscilloscope (11). The device can make the frequency difference between the two lasers fixed in the range of 10MHz to10GHz, and the device can stably and continually work and is less affected by the external environment.
Owner:SHANXI UNIV
A Kerr lens self-mode-locked titanium sapphire laser based on blue laser diode pumping
The invention discloses a Kerr lens self-mode-locked titanium sapphire laser based on novel blue laser diode pumping, Its structural features are: The novel blue laser diode-pumped Kerr lens self-mode-locked titanium sapphire laser comprises a blue laser diode, an aspherical lens, a cylindrical concave lens, a cylindrical convex lens, a 450 nm high-reflector, a plano-convex focusing mirror, a concave mirror, a titanium sapphire crystal, a coupling output mirror, a fused silica triprism and a laser high-reflector. The laser diode has the advantages of small volume, simple structure, high stability, low cost and the like, and is used for replacing the pump source of the traditional titanium sapphire femtosecond oscillator-all-solid-state frequency doubling laser. Therefore, the novel blue laser diode-pumped Kerr lens self-mode-locked Ti: sapphire laser provided by the invention has the advantages of compact, simple structure, stable operation, low cost and the like.
Owner:XIDIAN UNIV
Continuously tunable Ti sapphire laser covering all gain spectral lines and method thereof
InactiveCN111555106ATuned evenly and continuouslySimple structureOptical resonator shape and constructionPlane mirrorFluorescence
The invention relates to a continuously tunable Ti sapphire laser covering all gain spectral lines and a method thereof. The continuously tunable Ti sapphire laser comprises a pumping source, a telescope system, an optical resonant cavity, a Ti sapphire crystal and a birefringent filter. The laser beams emitted by the pumping source act on a titanium sapphire crystal in the optical resonant cavityafter being focused by the telescope system, fluorescence is generated in the stimulated radiation process of titanium sapphire, laser is generated in the mode selection and amplification process ofthe optical resonant cavity, and the laser is oscillated in the optical resonant cavity and then is transmitted by a second plane mirror to form the laser output. Meanwhile, a motor controller drivesa motor to drive a rotary table to adjust the included angle between the projection of the optical axis of the birefringent filter on the light passing surface and the laser incident surface, scanningis conducted from the starting angle of 18.4 degrees to 36.2 degrees, and therefore the output laser covering all gain spectral lines is obtained. According to the invention, the uniform and continuous 700-1000nm wavelength tuning can be realized under the condition of not changing the interference level, and the operation stability of the laser is not influenced.
Owner:SHANXI UNIV
Kerr lens mode locking Ti (Titanium) sapphire laser unit of 488nm laser pumping
The invention provides a kerr lens mode locking Ti (Titanium) sapphire laser unit of a 488nm laser pumping. The laser unit is used for outputting the laser of kerr lens mode locking, and comprises a pumping source, a resonant cavity and a Ti sapphire laser crystal, wherein the pumping source is used for providing a pump laser and is an optical fiber laser of which the output wavelength is 488nm; the resonant cavity is defined by a plurality of optical elements, and is used for providing a return optical path, so as to form an oscillating laser in the resonant cavity; the Ti sapphire laser crystal is used as a gain medium and a kerr medium, and is arranged in the resonant cavity. When the pumping source is adopted, the laser unit needs to operate at the lower pumping power to realize the kerr lens mode locking Ti sapphire laser unit, generate a stable mode locking laser pulse of which the pulse width is less than 10fs, and low loss is endowed to the Ti sapphire laser unit. The pumping source is high in reliably and low in requirement of a servo system, the Ti sapphire laser unit is more compact in structure, cheaper in price and lower in noise, therefore, the application of the Ti sapphire laser unit in the fields of science and technology, industry and the like can be greatly promoted.
Owner:INST OF PHYSICS - CHINESE ACAD OF SCI
Polarization dual wavelength fiber-optical ultrashort pulse laser
InactiveCN101510663BWorking with ultrashort light pulsesRealization of dual-wavelength mode-locked laser oscillationOptical resonator shape and constructionActive medium materialDielectricColor wavelength
The invention discloses a polarized dual-wavelength fiber ultrashort pulse laser. The structure of the ultrashort pulse laser adopts polarization-preserving or common rare earth doped fiber as a laser gain dielectric, and utilizes a polarized beam splitter to split light, a broadband chirped fiber grating as a cavity surface reflecting element and a dispersive compensation element and a semi-conductor saturable absorption body as a mode locking element, to generate a fiber laser with high repetition frequency, high power, simple structure and high efficiency, which is a laser realizing the full fiber dual-wavelength mode locking fiber ultrashort laser pulse output. The ultrashort pulse laser has output of picosecond and femtosecond light impulse length polarized laser, with the wavelengthof more than 1 micrometer; the laser, after being amplified by a high-power dual-wavelength fiber amplifier, can be used for substituting a two-color wavelength mode locking titanium sapphire laser and a two-color wavelength mode locking titanium sapphire amplifier with large volume, complex operation and low efficiency, for utilizing beat frequency to generate a mid-infrared ultrashort pulse laser with the wavelength of about 15 micrometers and for pump-detection ultrafast optical physics experiments of a molecular system or environmental monitoring and detection of microwave photonics and biophysics and the like.
Owner:JIANGSU SKYERALASER TECH
Continuously Tunable Single Frequency Ti:Sapphire Laser
ActiveCN104218444BStable single frequency operationAchieve continuous frequency tuningActive medium materialNonlinear optical crystalOptoelectronics
Owner:TAIYUAN SHANDA YUGUANG TECHNOLOGICAL
A Kerr lens self-mode-locked Ti:sapphire laser based on blue laser diode pumping
The invention discloses a Kerr lens self-mode-locked titanium sapphire laser based on novel blue laser diode pumping, Its structural features are: The novel blue laser diode-pumped Kerr lens self-mode-locked titanium sapphire laser comprises a blue laser diode, an aspherical lens, a cylindrical concave lens, a cylindrical convex lens, a 450 nm high-reflector, a plano-convex focusing mirror, a concave mirror, a titanium sapphire crystal, a coupling output mirror, a fused silica triprism and a laser high-reflector. The laser diode has the advantages of small volume, simple structure, high stability, low cost and the like, and is used for replacing the pump source of the traditional titanium sapphire femtosecond oscillator-all-solid-state frequency doubling laser. Therefore, the novel blue laser diode-pumped Kerr lens self-mode-locked Ti: sapphire laser provided by the invention has the advantages of compact, simple structure, stable operation, low cost and the like.
Owner:XIDIAN UNIV
Single-beam near-degenerate four-wave mixing microscope device and method
PendingCN112393801ALow costEasy to operateSpectrum investigationMethods for obtaining spatial resolutionBandpass filteringBeam splitter
The invention discloses a single-beam near-degenerate four-wave mixing microscope device and method, and the method comprises the steps: carrying out the dispersion compensation of a laser pulse transmitted by a Ti sapphire laser through a pair of prisms, cutting off the laser pulse at 781nm through an ultra-steep long-pass filter, reflecting the laser pulse through a dichroscope, and focusing thelaser pulse on a to-be-measured sample through an objective lens; a reflection signal on a to-be-detected sample is collected by the objective lens, sequentially penetrates through the dichroscope and the band-pass filter and then is guided into the first photomultiplier; transmission signals on a sample to be detected are gathered through the condensing lens and then are divided into a transmission light beam and a reflection light beam through the beam splitter, incident laser of the transmission light beam is filtered out through the first ultra-steep short-pass filter, and then the transmission light beam is focused through the lens and guided into the high-resolution integrated spectrograph to record spectral data. And the reflected light beam is reflected by the reflector, then filtered by the second ultra-steep short-pass filter and finally guided into the second photomultiplier for four-wave mixing imaging. The method has the advantages of being simple, cheap and easy to operate.
Owner:YULIN UNIV
Single-frequency continuous wave tunable Ti sapphire laser based on birefringence etalon locking
The invention relates to a single-frequency continuous wave tunable Ti sapphire laser based on birefringence etalon locking. The single-frequency continuous wave tunable Ti sapphire laser comprises a pumping source, a light beam coupling system located on an emergent light path of the pumping source and a laser resonant cavity located on an emergent light path of the light beam coupling system. A birefringence etalon forming a certain included angle with a main light path is arranged in the laser resonant cavity; a plane mirror, a first lens, a quarter-wave plate and a polarization beam splitter are sequentially arranged on a reflection light path of the birefringence etalon; a second lens and a first photoelectric detector are arranged on a reflection light path of the polarization beam splitter; a third lens and a second photoelectric detector are arranged on a transmission light path of the polarization beam splitter; the output ends of the first photoelectric detector and the second photoelectric detector are connected with the servo controller; the signal output end of the servo controller is connected with the galvanometer motor; and the birefringence etalon is adhered to a rotating shaft of the galvanometer motor. According to the invention, the influence of additional modulation signals on the noise characteristics of the laser can be avoided, and the low-noise tunable Ti sapphire laser is realized.
Owner:TAIYUAN SHANDA YUGUANG TECHNOLOGICAL
Solid double-frequency laser light knife
InactiveCN1128607CRealize full solidificationSafe and reliable workEye surgerySurgical instrument detailsLaser lightTitanium
The present invention relates to an all-solid double-frequency laser light knife for operation to cure ametiopia. Said invention is formed from laser, scanning ascillatory mirror controlled by computer and laser output system, and is characterized by adopting solid baser pump, using titanium jewel laser to make gain and utilizing double-frequency crystal two-stage frequency multiplication to output laser whose wavelength is near 208 nm, and transferring said laser into scanning oscillatory mirror. Said invented product is safe, reliable, and good in therapeutic effect, and its stability is greatly raised, its structure is simple and cost is greatly reduced.
Owner:XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
A Kerr lens mode-locked Ti:sapphire laser pumped by a semiconductor laser
ActiveCN107565360BStable offset frequencyImprove pumping efficiencyLaser detailsFrequency stabilizationCarrier signal
The invention discloses a Kerr lens mode-locked Ti:sapphire laser pumped by a semiconductor laser, comprising: a first semiconductor laser for emitting continuous laser light in the blue-green band to pump a Ti:sapphire crystal in a resonant cavity; It is used to oscillate and mode-lock the laser in the near-infrared band to output the femtosecond pulse laser; the interferometer makes the femtosecond pulse laser generate a beat frequency signal to obtain the carrier envelope offset frequency; the feedback adjustment unit is used to adjust the front and rear positions of the resonator end mirror and inclination, as well as the output laser power of the semiconductor laser, so as to keep the repetition frequency and carrier envelope offset frequency stable. The invention can output ultra-short laser pulses with stable repetition frequency and carrier envelope offset frequency, and directly uses semiconductor lasers as pumping sources, which greatly reduces the cost of the laser and further reduces the volume of the entire laser.
Owner:HUAZHONG UNIV OF SCI & TECH
A 10mhz-10ghz optical phase-locked loop device
ActiveCN108196412BAchieve lockingSimple and fast operationPulse automatic controlPhotonic quantum communicationBeam splitterFrequency spectrum
The invention relates to the field of optical phase-locked loops and provides a 10MHz-10GHz optical phase-locked loop device. The device includes a titanium-doped sapphire laser (1), a semiconductor laser (2), a high-bandwidth photoelectric detector (3), a radio frequency power beam splitter (4), a spectrum analyzer (5), a high-frequency signal generator (6), a frequency mixer (7), a radio frequency power amplifier (8), a signal generator (9), an optical phase-locked loop module (10), and an oscilloscope (11). The device can make the frequency difference between the two lasers fixed in the range of 10MHz to10GHz, and the device can stably and continually work and is less affected by the external environment.
Owner:SHANXI UNIV
Ti:Sapphire Laser Amplifier
ActiveCN104253373BSmall absorption coefficientNo need to replaceActive medium materialOptoelectronicsAbsorption rate
The invention provides a titanium sapphire laser amplifier, which comprises a pumping laser, a titanium sapphire crystal, a multi-path amplifier, a laser seed source and a synchronous time delay. The titanium sapphire laser amplifier is characterized in that a pumping light half wave plate is added into an output light path of the pumping laser, and a pumping light quarter wave plate and a pumping light reflecting mirror are sequentially added into a transmission light path of the titanium sapphire crystal. The titanium sapphire laser amplifier has the advantages that the transverse gain of the titanium sapphire crystal can be effectively reduced, so the parasitic oscillation of the titanium sapphire is well inhibited, in addition, the absorption rate of the titanium sapphire crystal on the pumping light can be improved, and the seed light amplification efficiency is improved. The titanium sapphire laser amplifier has the characteristics that the regulation is convenient, simplicity and high efficiency are realized, and the practicability is high.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
A device for generating two-component continuous variable high-order orbital angular momentum entangled states
The invention provides a device and method for preparing a two-component continuous variable high-order orbital angular momentum entanglement state, including a titanium sapphire laser, a mirror, an optical beam splitter, a half-wave plate, an electro-optical modulator, and a high-frequency signal generator , filter, lens group, Glan laser prism, cesium atom pool, Glan Thomson prism, beam collector, balanced zero-beat detector, adder and subtractor, spectrum analyzer. The device of the invention can obtain a continuous variable high-order orbital angular momentum entanglement state with a maximum entanglement degree of -3.8dB, and the device has stable performance and compact structure, and can realize commercial production. Cesium atom D 1 The line transition frequency corresponds to the quantum dot exciton emission region of indium arsenide, and the one produced by the present invention corresponds to the cesium atom D 1 The two-component continuous variable high-order orbital angular momentum entangled state light source with linear transition frequency can be used in the fields of coherent interface research and quantum precision measurement based on atoms and solid-state systems.
Owner:SHANXI UNIV
Single-frequency continuous-wave all-solid-state Ti:Sapphire laser with automatic wide tuning
The invention relates to a single-frequency continuous wave all-solid-state Ti sapphire laser for realizing automatic broad tuning and a method thereof. The invention aims to settle technical problems of tedious operation, narrow tuning range and low tuning precision in an existing tunable Ti sapphire laser and the tuning method thereof. The single-frequency continuous wave all-solid-state Ti sapphire laser for realizing automatic broad tuning is characterized by comprising a pumping source, a Ti sapphire crystal, a four-lens ring laser resonator, a broadband optical isolator, a birefringence wave filter, an electric-optical standard member, a coupling system, a beam splitter mirror, a wavemeter, a computer, a piezoelectric controller and a piezoelectric rotating motor. According to the single-frequency continuous wave all-solid-state Ti sapphire laser and the method, a Labview automatic control program is used for realizing automatic tuning for output wavelength of the Ti sapphire laser; and an automatic broad tuning device can realize tuning for output wavelength of the all-solid-state continuous single-frequency Ti sapphire laser through setting a target wavelength on a control interface, thereby realizing no requirement for a tedious and complicated operation process and greatly reducing error rate in manual operation.
Owner:SHANXI UNIV
Device for generating two-component continuous variable high-order orbital angular momentum entangled state
The invention provides a device and method for preparing a two-component continuous variable high-order orbital angular momentum entangled state, and the device comprises a Ti sapphire laser, a reflector, an optical beam splitter, a half-wave plate, an electro-optical modulator, a high-frequency signal generator, a filter, a lens group, a Glan laser prism, a cesium atom pool, a Glan-Thompson prism, a light beam collector, a balanced zero-beat detector, an adder-subtractor and a spectrum analyzer. According to the device, the continuous variable high-order orbital angular momentum entangled state with the maximum entanglement degree of-3.8 dB can be obtained, the device is stable in performance and compact in structure, and commercialized production can be achieved. The cesium atom D1 line transition frequency corresponds to a quantum dot exciton emission region of indium arsenide. The generated two-component continuous variable high-order orbital angular momentum entangled state light source corresponding to the cesium atom D1 line transition frequency can be applied to the fields of coherent interface research based on atoms and a solid-state system, quantum precision measurement and the like.
Owner:SHANXI UNIV
Synchronously Pumped Self-Starting Femtosecond Ti:Sapphire Laser Oscillator
ActiveCN107658687BAchieve normal operationReduce complexityLaser detailsResonant cavityTi:sapphire laser
The invention relates to a synchronous pumping self-start femtosecond Ti sapphire laser oscillator. The Ti sapphire laser oscillator comprises a pumping laser source (1) which outputs pumping laser, and a Ti sapphire resonant cavity (4) which comprises a Ti sapphire crystal (21) arranged in the resonant cavity. The pumping laser performs pumping on the Ti sapphire crystal to generate output laser.The cavity length of the Ti sapphire resonant cavity is N times or 1 / N the cavity length of the pumping laser source. The repetition frequency of the output laser generated by the Ti sapphire resonant cavity is 1 / N or N times that of the pumping laser output by the pumping laser source, wherein N is a positive integer. Without any self-start assisting materials, self-start femtosecond modelockedlaser operation can be achieved by matching the cavity lengths of the Ti sapphire resonant cavity and the pumping laser source; the repetition frequency of femtosecond pulses and repetition frequencyof the pumping laser source form a relation of integer multiples.
Owner:INST OF PHYSICS - CHINESE ACAD OF SCI
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