19 results about "Optical parametric oscillator" patented technology

This application discloses an optical parametric oscillator and a laser generating device, relating to the field of laser technology. The optical parametric oscillator includes a first optical fiber, a mirror assembly, a nonlinear crystal, and a second optical fiber. The first optical fiber has a first receiving end and a first output end. The first receiving end is used to receive pump light. The second optical fiber has a second receiving end and a second output end. Light output from the first output end can be transmitted to the second receiving end via the mirror assembly and the nonlinear crystal. The second output end is used to output signal light. The mirror assembly includes multiple mirrors. The nonlinear crystal is located in the optical path between two mirrors. A first grating is disposed on the first optical fiber, and a second grating is disposed on the second optical fiber. Both the first and second gratings are fiber Bragg gratings. Because this application uses a first optical fiber and a second optical fiber to define the light transmission path, compared to a free-space optical path, the optical fiber can be coiled, which is beneficial for reducing the overall size and improving integration.

The present application discloses a single-frequency continuous-wave optical parametric oscillator, comprising a pumping source, a focusing lens, a resonant cavity, an optical parametric down-conversion crystal, and a birefringent crystal. The resonant cavity comprises a concave-convex lens, an output planoconcave lens, and at least two transitional planoconcave lenses; and a waist spot of pump light obtained through the focusing lens is located between the concave-convex lens and a first transitional planoconcave lens adjacent to the concave-convex lens on a light path. The center of the optical parametric down-conversion crystal coincides with a waist spot of the pump light; the birefringent crystal is located at the beam waist between the output planoconcave lens and the second transitional planoconcave lens adjacent to the output planoconcave lens on the light path; and the birefringent crystal adopts a critical phase matching or non-critical phase matching mode.

The application discloses a kind of high stability optical parametric oscillator assisted by intelligent feedback algorithm, and relates to the technical field of optical parametric oscillator.The oscillator includes 515 nm pump laser source, half-wave plate, polarization beam splitter, plane mirror, dichroic mirror, concave focusing cavity mirror, nonlinear crystal, output coupling mirror, four-quadrant photodetector based on STM32, DAC high-voltage drive board and piezoelectric deflection mirror.The application utilizes four-quadrant photodetector to monitor laser output power in real time, and collects data through the combination of ADC and direct memory access (DMA), realizes double buffering operation by means of full transmission and half transmission mechanism, to efficiently obtain the performance indicators required by SPGD algorithm.The algorithm continuously iterates and optimizes, controls piezoelectric deflection mirror in real time, precisely adjusts cavity length and beam pointing, and effectively stabilizes laser output power.

The application provides a narrow linewidth continuous tuning middle infrared optical parametric oscillator and a working method thereof. The middle infrared optical parametric oscillator comprises a pump source, a convex lens, a plane mirror, a MgO:PPLN crystal, a concave mirror, a first etalon, a second etalon and a plane output mirror which are arranged in sequence along an optical path in a resonant cavity. The MgO:PPLN crystal is placed in a temperature control furnace, the first etalon is provided with a heating sheet, and the thickness of the first etalon is greater than that of the second etalon. On the basis of crystal temperature tuning, the application combines a thermal tuning etalon to realize continuous wavelength tuning output.

A kind of lidar technology for atmospheric waveguide fast measurement, temperature and humidity profile, the key factor of atmospheric waveguide, can be measured simultaneously, the device includes laser emission module: 822nm online seed laser, 822nm offline seed laser, 1064nm pump laser, laser frequency locking module, optical parametric oscillator, acoustooptic modulator, frequency doubling module and emission optical assembly;Echo receiving module: optical receiving telescope and optical lens assembly, F-P filter, polarization light splitting prism, iodine molecular absorption cell, Fizeau interferometer and photodetector;Data acquisition and processing module.The present application fuses differential absorption lidar and two detection systems based on interferometer high spectral lidar, adopts seed injection optical parametric oscillator laser technology, obtains high frequency stability 822nm laser to realize atmospheric humidity profile fast measurement, remaining 532nm laser realizes atmospheric temperature profile fast measurement, finally inverts atmospheric waveguide parameter, realizes atmospheric waveguide efficient and accurate measurement.

This invention relates to a series of alkali metal rare earth chalcogenides and a series of alkali metal rare earth chalcogenide nonlinear optical crystals, their preparation methods, and their applications. The general chemical formula for both the series of halides and the nonlinear optical crystals is A3Ln. 11 Ga 19 Q 45 X3, where A = K, Rb, Cs; Ln = La, Pr, Nd; Q = S, Se; X = Cl, Br, I, all belong to the hexagonal crystal system with space group and cell parameter Z = 1. This series of halides is synthesized using a high-temperature solid-state method, while this series of nonlinear optical crystals is grown using a high-temperature solution method or the Bridgman process. This material can be used to manufacture second harmonic generators, up- and down-frequency converters, optical parametric oscillators, etc.

To provide a vertical resonator optical parametric oscillator. [Solution] In some embodiments, a vertical resonator optical parametric oscillator may be provided. The vertical resonator optical parametric oscillator may include a first mirror layer, a second mirror layer, and a nonlinear optical layer between the first and second mirror layers. The nonlinear optical layer may be configured to resonate both the fundamental harmonic optical signal and the second harmonic optical signal. Each of the first and second mirror layers may have a reflective surface for both the fundamental harmonic optical signal and the second harmonic optical signal to be reflected back and forth within the nonlinear optical layer.

This invention relates to a compound strontium borate nitrate and a strontium borate nitrate nonlinear optical crystal, as well as their preparation methods and uses. The chemical formula of the compound is Sr3B9O. 16 (NO3), with a molecular weight of 678.16, was prepared using a vacuum-sealed tube method; the chemical formula of this crystal is Sr3B9O. 16 (NO3), with a molecular weight of 678.16, belongs to the monoclinic crystal system and has a space group of Cc The unit cell parameters are a =11.2574(9)Å, b =6.6400(9)Å, c =18.1027(13)Å, Z=4, V=1348.9(2)Å 3 It is prepared using a high-temperature melt method or hydrothermal method under vacuum sealing conditions. Its nonlinear optical effect is approximately three times that of KDP, and its birefringence is 0.088@546 nm. This method has advantages such as simple preparation, short growth cycle, low toxicity of starting materials, and minimal harm to humans. Sr3B9O obtained by the method described in this invention... 16 (NO3) Nonlinear optical crystals have stable physicochemical properties, large nonlinear effects, and can be applied to phase-matching wavelengths in the ultraviolet band. They can be widely used in nonlinear optical devices such as frequency doubling converters and optical parametric oscillators.

In some embodiments, a vertical cavity optical parametric oscillator may be provided. The vertical cavity optical parametric oscillator may include a first mirror layer and a second mirror layer and a non-linear optical layer between the first mirror layer and the second mirror layer. The non-linear optical layer may be configured to resonate both a fundamental harmonic optical signal and a second harmonic optical signal. Each of the first mirror layer and the second mirror layer may provide reflecting surfaces for both the fundamental harmonic optical signal and the second harmonic optical signal to reflect back and forth within the non-linear optical layer.

The invention relates to an optical parametric oscillator (2) comprising: - a laser source system (10) producing a pump light beam (100); - a dichroic mirror (20) receiving the pump light beam and transmitting a first combination light beam (102); - a focusing optical system (30) receiving the first combination light beam; - a non-linear medium (40), the non-linear medium producing as output a second combination light beam (104); - a focusing optical system (32) receiving the second combination light beam; - a dichroic mirror (22) receiving the second combination light beam, the dichroic mirror reflecting, in a first direction, the signal light beam (108); and - a hollow optical fiber (70) receiving the signal light beam, the hollow optical fiber being wound onto itself.

This invention relates to the compounds strontium lanthanum chloroborate and barium lanthanum chloroborate, as well as nonlinear optical crystals of strontium lanthanum chloroborate and barium lanthanum chloroborate, their preparation methods, and their uses. The general chemical formula for both the compounds and crystals is A3La4B3O. 13 Cl, where A = Sr, Ba, space group P63, belongs to the hexagonal crystal system, and cell parameter Z = 2. The compounds lanthanum strontium chloroborate and lanthanum barium chloroborate are synthesized by a solid-state reaction method. The nonlinear optical crystals of lanthanum strontium chloroborate and lanthanum barium chloroborate are grown using a high-temperature melt method. This material can be used to manufacture second harmonic generators, up-down frequency converters, optical parametric oscillators, etc.

This application discloses a fluorinated zirconium phosphate compound, its nonlinear optical crystal, its preparation method, and its applications. The chemical formula of the fluorinated zirconium phosphate compound is Rb. x (NH4) y Zr4(H2PO4)F 21 Where 0≤x≤6, 0≤y≤6, and x+y=6. The nonlinear optical crystal is a one-dimensional chain structure formed by connecting [H2PO4] tetrahedra with [ZrF7] / [ZrOF7] fluorine-containing zirconium coordination polyhedra; the nonlinear optical crystal is a non-centrosymmetric crystal; the nonlinear optical crystal is an orthorhombic crystal system; the space group of the nonlinear optical crystal is... Pna 21; The unit cell parameters of a nonlinear optical crystal are a =13.6933(3)Å, b =15.2014(4)Å, c =11.4304(2)Å, α = β = γ =90°, unit cell volume V =2379.32(9)Å 3 This nonlinear optical crystal possesses both deep ultraviolet transparency and a strong second harmonic response. The fabrication method utilizes a hydrothermal reaction, which is simple and operates under mild conditions. The resulting nonlinear optical crystal can be used to construct nonlinear optical devices such as frequency multipliers, sum / difference frequency converters, and optical parametric oscillators.

The application provides a wavelength-tunable mid-infrared laser, comprising, in sequence along an optical transmission direction: a full-solid-state multi-wavelength laser for outputting short-wave infrared pulse lasers of multiple different wavelengths; a standard component assembly with a rotation angle for selectively outputting the short-wave infrared pulse lasers; a coupling module for beam shaping of the short-wave infrared pulse lasers; a first acousto-optic deflection assembly for changing the transmission direction of the short-wave infrared pulse lasers and injecting the short-wave infrared pulse lasers into an optical parametric oscillator; the optical parametric oscillator for absorbing the short-wave infrared pulse lasers and outputting mid-infrared pulse lasers of multiple different wavelengths; and a second acousto-optic deflection assembly for synchronously deflecting the mid-infrared pulse lasers to realize the common-aperture coaxial output of the mid-infrared pulse lasers. The mid-infrared laser output by the mid-infrared laser has the advantages of wide spectral coverage, fast wavelength switching, high repetition frequency, wavelength coding and common-aperture coaxial output.

The application provides an optical device, comprising: a laser providing a light beam of a first wavelength; a first beam splitter splitting the light beam of the first wavelength; an optical parametric oscillator halving the frequency of a first split light beam with less energy to obtain a wavelength-doubled light beam; a first beam combiner superimposing the wavelength-doubled light beam and the split light beam with the first wavelength; a phase matcher adjusting the relative phase of the wavelength-doubled light beam and the split light beam with the first wavelength so that the energy of the split light beam with the first wavelength is converted into the wavelength-doubled light beam in an optical parametric amplifier; the optical parametric amplifier amplifying the wavelength-doubled light beam; and a harmonic beam splitter separating the wavelength-doubled output light beam. The application can generate a laser beam with a wavelength of 2 microns from a mature laser beam with a wavelength of about 1 micron in industrial high-power material processing, and has the advantages of small realization difficulty, high controllability, high conversion efficiency and suitability for industrial application.

The embodiment of the present application provides a kind of high-energy optical parametric oscillator, especially mid-far infrared optical parametric oscillator.The high-energy optical parametric oscillator includes: pump light emitting module, frequency conversion module, optical spectrum beam combining module and output coupling mirror arranged in sequence along the optical path;Wherein, pump light emitting module is used to emit multiple beams of pump light of preset wavelength to frequency conversion module;Frequency conversion module includes multiple optical parametric frequency conversion modules, and optical parametric frequency conversion module is used to convert received pump light into parametric light;Optical spectrum beam combining module is used to perform optical spectrum beam combining on multiple beams of parametric light generated by frequency conversion module to form combined beam light, and combined beam light is transmitted to output coupling mirror;Output coupling mirror is used to reflect part of combined beam light back to each optical parametric frequency conversion module to form feedback oscillation, and another part of combined beam light is output.The high-energy optical parametric oscillator realizes the output of high beam quality high-energy parametric light using simple optical device combination.

The invention relates to an optical parametric oscillator (2) comprising: - a laser source system (10) generating a pump light beam (100), - a dichroic mirror (20) receiving the pump light beam and transmitting a first combination light beam (102), - a focusing optical system (30) receiving the first combination light beam, - a nonlinear medium (40), the nonlinear medium generating at its output a second combination light beam (104), - a focusing optical system (32) receiving the second combination light beam, - a dichroic mirror (22) receiving the second combination light beam, the dichroic mirror reflecting, in a first direction, the signal light beam (108), and - a hollow optical fiber (70) receiving the signal light beam, the hollow optical fiber being wound upon itself. Figure to be published with the abbreviation: Figure 2

The application provides a mid-infrared laser based on hydrogen Raman laser and optical parametric oscillation, comprising a Nd:YAG laser, a hydrogen stimulated Raman cell and an optical parametric oscillator, wherein the Nd:YAG laser emits circularly polarized laser, the circularly polarized laser enters the hydrogen stimulated Raman cell, and multi-wavelength laser is generated through a stimulated Raman process; and specific wavelength laser in the multi-wavelength laser excites the optical parametric oscillator to generate mid-infrared laser. In the application, 1064nm circularly polarized laser generates 2.1mu m laser through hydrogen stimulated Raman, and the 2.1mu m laser pumps ZGP OPO to generate 3-5mu m infrared laser. The working principle of the laser of the application is simple, and compared with the scheme of Tm:YLF, Ho:YAG and OPO emitting light in turn, the complexity is significantly reduced, and the advantages of the stable and reliable Nd:YAG laser are fully utilized.

The application belongs to the technical field of laser, and proposes an optical parametric oscillator based on double compensation structure and secondary pump energy extraction, which comprises a pump light input unit, a four-mirror plane ring cavity unit, a parametric gain unit composed of four KTA crystals, a signal light polarization control unit, a dichroic mirror light splitting unit and a residual pump multiplexing and timing adjustment unit. The four crystals are divided into two paths, and each path has two crystals that complete walk-off compensation in pairs. Meanwhile, the two crystal pairs are orthogonal in walk-off direction through orientation transformation, exchange and average the transverse gain asymmetry caused by walk-off, realize the transverse cavity mode bias compensation, and effectively improve the parametric light space output characteristics. The residual pump light of the first path is separated and time-adjusted, and then guided to the second path crystal for secondary energy extraction, which significantly improves the conversion efficiency. The application realizes high average power, high beam quality and consistent two-axis divergence trend of laser output.

The application discloses a terahertz waveband substance dielectric property measuring system and method, and relates to the technical field of terahertz waveband substance detection. The system comprises a laser frequency doubling unit, an optical parametric oscillator, an ultra-wideband terahertz difference frequency generating crystal, a transmission type test platform, a terahertz intensity detection device and a spectral data acquisition and processing device. The laser frequency doubling unit is used for emitting laser with a preset wavelength. The optical parametric oscillator is used for controllably outputting double-wavelength difference frequency pumping light. The ultra-wideband terahertz difference frequency generating crystal is used for outputting difference frequency terahertz waves. The transmission type test platform is used for carrying test samples with different preset thicknesses Li. The spectral data acquisition and processing device is internally provided with a spectral intensity determination model of the test sample, a dielectric property real part determination model, a dielectric property imaginary part determination model and a dielectric property determination model. The spectral data acquisition and processing device is electrically connected with the terahertz intensity detection device and the optical parametric oscillator.