21 results about "Parametric oscillation" patented technology

The invention provides a device for monitoring a combustion process in real time, and belongs to the technical field of combustion process monitoring and control. The device comprises a multispectral light source module, an optical detection module, a data processing module and a control module. The multispectral light source module can emit multispectral signals covering ultraviolet, visible and infrared bands, and multiple paths of light beams are generated through light beam shaping, frequency doubling, optical parametric oscillation and the like and are incident to a combustion area. The data processing module performs feature extraction, mode recognition and trend prediction on the signals, and recognizes parameters such as flame state, temperature, gas concentration, combustion efficiency and pollutant emission. The control module dynamically adjusts operation parameters of the combustor according to the analysis result, and closed-loop control is achieved. Through multi-band spectrum joint detection and intelligent algorithm analysis, the defect that single-band detection is prone to interference is overcome, and high-sensitivity, multi-dimensional and real-time monitoring and intelligent control over the combustion process are achieved.

The application relates to a high-power mid-infrared optical parametric oscillation amplification device directly pumped by a Tm laser, and belongs to the technical field of high-power mid-infrared lasers. The device comprises a Tm:YLF seed laser, a Tm:YLF slab amplifier, a ZGP optical parametric oscillator and a ZGP optical parametric amplifier in sequence. The Tm:YLF seed laser outputs 1.908-micron fundamental light, the power of the 1.908-micron fundamental light is amplified through the Tm:YLF slab amplifier, and then the ZGP optical parametric oscillator and the ZGP optical parametric amplifier are directly pumped. The injection end and the output end of the Tm:YLF slab amplifier are both provided with a fundamental light coupling isolation system. A mid-infrared laser coupling isolation system is arranged between the ZGP optical parametric oscillator and the ZGP optical parametric amplifier. The ZGP optical parametric oscillator and the ZGP optical parametric amplifier are directly pumped by high-power Tm:YLF lasers, so that the power of the mid-infrared laser and the overall efficiency of the system are improved.

An oscillation apparatus includes: an oscillator including a resonator and a magnetic-field generating unit, the resonator including a loop circuit and a capacitor, the loop circuit including a first superconducting line, a first Josephson junction, a second superconducting line, and a second Josephson junction connected in a ring shape, the magnetic-field generating unit being configured to apply a magnetic field to the loop circuit, and the oscillator being configured to perform parametric oscillation; a read-out unit for reading out an internal state of the oscillator; and a filter configured to restrict transmission of a signal in a predetermined frequency band. A circuit in which the capacitor and the loop circuit are connected in a ring shape is connected to the read-out unit through the filter.

This invention relates to a laser generating device with a wavelength of 215-222 nm, comprising: an excitation light source unit that converts laser light with a wavelength of 1030-1064 nm into a second harmonic to generate laser light with a wavelength of 515-532 nm; an optical parametric oscillation unit that uses the laser light with a wavelength of 515-532 nm as excitation light to generate signal light with a wavelength of 858-887 nm and idle light with a wavelength of 1288-1330 nm; a separation unit that separates the signal light and the idle light; a first wavelength conversion unit that generates a fourth harmonic from the signal light; a second wavelength conversion unit that generates deep ultraviolet light with a wavelength of 215-222 nm from the idle light by light summing with the second harmonic of the excitation light; and a coupling unit that couples the fourth harmonic from the first wavelength conversion unit with the deep ultraviolet light from the second wavelength conversion unit. This invention provides a laser generating device capable of efficiently and simply generating pulsed laser light with a wavelength of 215-222 nm, including a wavelength of 222 nm that inactivates microorganisms.

The invention discloses a picosecond optical fiber optical parametric oscillator based on acousto-optic wavelength tuning, which comprises an embedded integrated control platform, and the embedded integrated control platform controls a mode-locked laser seed source, a narrow-spectrum high-power tunable pumping source and an optical fiber optical parametric resonant cavity in a coordinated manner; the mode-locked laser seed source adopts a mode-locked laser oscillator as a seed source, a tunable spectrum filter and a laser amplifier are arranged behind the mode-locked laser seed source, and the tunable spectrum filter can also be arranged in a resonant cavity of the mode-locked laser oscillator. And a laser amplifier is arranged behind the mode-locked laser oscillator to obtain narrow-spectrum high-power tunable pulse laser. On the basis of the laser saturation gain amplification process of bi-pass filtering, narrow-spectrum, high-power and picosecond pulse laser output with the adjustable center wavelength of 1035-1065 nm is achieved, and on the basis of the optical fiber optical parametric oscillation process, high-power, narrow-spectrum and picosecond pulse laser output with the rapidly-adjusted center wavelength of 785-985 nm is achieved.

Provided herein are Ising machines having a resonant input mesh driven by a pump signal, a resonant output mesh coupled to the input mesh through a nonlinear component to form a parametric frequency divider (PFD), and the nonlinear component configured to passively activate, responsive to the pump signal exceeding a threshold power, a parametric oscillation between the input and output meshes having an oscillation frequency equal to half an angular input frequency of the pump signal, wherein an output signal of the PFD can be switched between an in-phase state and an out-of-phase state.

Harmonically modelocked (HML) frequency comb lasers can allow an increase of the repetition rate of passively modelocked laser by up to a factor of 1000 to the frequency range of 1-40 GHz, while preserving their comb properties. An HML laser can include a reference cavity with a beam splitter that is a common mode to the reference cavity and a main cavity, while further configured for also producing an output for the HML optical frequency comb. Bulk as well as fiber reference cavities can be implemented with ultra-low expansion thermal expansion materials that allow the use of HML lasers as precision frequency references and frequency synthesizers for the microwave, mm wave and optical frequency domain. HML dual frequency combs with minimal differential noise between the two combs can reference both combs to the same reference cavity. Harmonic modelocking can also facilitate optical parametric oscillation inside the reference cavity.

The invention discloses a three-resonance enhanced four-wave mixing VUV light source, which comprises a light splitting module, an optical parametric oscillation module and a mixing module, and is characterized in that the light splitting module utilizes a half-wave plate and a Glan prism to flexibly adjust to enter the Glan prism so as to divide incident light into two beams, and the two beams are respectively transmitted to the next Glan prism and the optical parametric oscillation module; the first half-wave plate is used for changing the polarization state of the incident light so as to adjust the light splitting ratio of the two beams of light; the optical parametric oscillation module comprises a first oscillation unit, a second oscillation unit and a third oscillation unit, and is used for performing a nonlinear process on the multiple beams of incident light split by the light splitting module so as to output multiple pieces of frequency mixing light with specific frequencies; and the frequency mixing module comprises a frequency mixing pool, the frequency mixing pool is filled with mercury vapor, the first frequency mixing light, the second frequency mixing light and the third frequency mixing light enter the frequency mixing pool through beam combination for four-wave mixing so as to obtain vacuum ultraviolet light, the adjustability is high, and the frequency mixing light energy output by each oscillation unit can be flexibly regulated and controlled.

This invention discloses a continuous terahertz wave radiation source based on optical parametric oscillation in a waveguide cavity, its usage method, and its fabrication method, belonging to the field of optical communication technology. The continuous terahertz parametric oscillation radiation source includes a nonlinear dielectric waveguide layer and a substrate waveguide layer disposed on the upper and lower surfaces of the nonlinear dielectric waveguide layer. Reflective films are disposed on two opposite sides of the nonlinear dielectric waveguide layer to form a waveguide cavity within the nonlinear dielectric waveguide layer. The thickness and width of the nonlinear dielectric waveguide layer both satisfy the wave vector matching condition, and the thickness of the nonlinear dielectric waveguide layer is 5~50 μm. By obtaining a large nonlinear coupling coefficient, a small terahertz propagation loss, and achieving wave vector matching, the continuous terahertz wave radiation source provided by this invention can achieve high terahertz conversion efficiency, the waveguide cavity has a high quality factor, enhances the effective field strength within the nonlinear dielectric waveguide layer, and significantly reduces the terahertz parametric oscillation threshold.

The application discloses a soliton optical frequency comb and an optical microwave signal generation device, which comprises an optical source unit and an input light control unit, is suitable for obtaining amplified first pump laser, amplified second pump laser and amplified third pump laser; a micro resonant cavity unit comprising a micro resonant cavity, is suitable for generating a soliton optical frequency comb through a nonlinear four-wave mixing parametric oscillation process in the micro resonant cavity by using the amplified first pump laser; is suitable for compensating optical power changes caused by frequency mismatch of the amplified first pump laser by using the amplified second pump laser in the micro resonant cavity; and is suitable for suppressing thermal mechanical vibration noise of the micro resonant cavity based on optical force refrigeration effect by using the amplified third pump laser, so as to suppress phase noise of the soliton optical frequency comb; and a soliton optical frequency comb monitoring unit comprising a microwave signal generation module, the microwave signal generation module is suitable for generating an optical microwave signal by using the soliton optical frequency comb.

The application discloses a kind of based on four-wave mixing effect's ultrafast laser output's fiber parametric oscillator, belong to laser technology and laser control field.It includes: pump source, wavelength division multiplexer, gain optical fiber, optical isolator, photonic crystal fiber, reflective wavelength division multiplexer, optical path delay line, 1×2 optical fiber coupler, data collector, optical fiber coupling photoelectric detector.The application utilizes passive optical fiber, gain optical fiber, photonic crystal fiber and optical fiber device not only realizes the full fiber of laser, but also improves the environmental stability of laser.Through reflective wavelength division multiplexer, 900nm signal light is filtered out and returned to ring cavity parametric oscillation, and through optical path delay line, the overlapping part of signal light and pump light is adjusted, finally through 1×2 optical fiber coupler, stable 900nm tunable ultrafast laser output is realized.

The invention relates to a pump enhanced optical parametric oscillator based on a monolithic cavity PPLN crystal, a vortex light generation method and application. The pump enhanced optical parametric oscillator comprises a pump laser, a matching lens, a half-wave plate, a polarization beam splitter, a quarter-wave plate, a radial polarization converter, the PPLN crystal, a temperature control furnace, a multi-dimensional adjusting frame and a spectroscope. The two end faces of the PPLN crystal are spherical surfaces, the end faces are coated with film layers, and the PPLN crystal serves as an optical parametric oscillation cavity, so that a complex cavity mirror system is omitted; the end face of the PPLN crystal is coated with a film, so that the effect of pumping enhancement is achieved, the threshold value is reduced, the conversion efficiency is improved, meanwhile, the wavelength tuning characteristic is considered, the thermal self-locking effect and the thermal lens effect are utilized, long-time wavelength stability and power stability are achieved, and a complex stable cavity system is omitted; when pump light is converted into vortex light through the S wave plate, orbital angular momentum can be selectively transmitted to idler frequency light or signal light, intermediate infrared or near-infrared vortex light output is achieved, and a miniaturized and portable vortex light generator and multi-field application can be achieved.

The application relates to the technical field of laser radar, and discloses a full-solid-state troposphere and stratosphere ozone detection laser radar system which comprises a pump light generation module, a solid-state ultraviolet laser module, a wavelength real-time monitoring module, a return light signal receiving module and a signal collection and storage module. The pump light generation module is used for generating an ultraviolet laser beam; the solid-state ultraviolet laser module divides the ultraviolet laser beam into four detection lasers which respectively form a differential absorption wavelength pair for detecting stratosphere ozone and a differential absorption wavelength pair for detecting troposphere ozone; the wavelength real-time monitoring module is used for monitoring the frequencies of the four detection lasers in real time; the return light signal receiving module is used for receiving backscattering return light signals of the detection lasers at different altitudes and converting the backscattering return light signals into electric signals; and the signal collection and storage module is used for collecting the electric signals and storing the electric signals as digital signals. The full-solid-state design of the system is realized through the optical parametric oscillation technology when four narrow-band laser ozone detection wavelengths are generated, the ozone concentrations in the stratosphere and the troposphere can be simultaneously detected, and continuous observation can be realized in the daytime and at night.

A method for generating frequency converted laser radiation is disclosed. The disclosure provides a method enabling generation of a frequency converted wavelength division multiplexed light source that is easy to implement at low cost. Adjustment of the center frequency and the mode spacing in a frequency converted wavelength division multiplexed light source is also disclosed. A related method of use discloses generating pump laser radiation through combination of multiple pump sources in a wavelength division multiplexed arrangement; passing the pump laser radiation through the non-linear medium of a singly resonant, single-frequency optical parametric oscillator, wherein the pump laser radiation is continuous wave or pulsed, wherein the pulse duration in the latter case is longer than the time the optical parametric oscillation requires to reach its steady state; and coupling out the non-resonant idler or signal laser radiation from the optical parametric oscillator as usable frequency converted laser radiation. Moreover, the invention relates to a laser device for carrying out the method of the invention.

The invention discloses an all-solid-state vacuum ultraviolet light source system and device, the device comprises two input modules and a frequency mixing module, the number of the input modules is two, and each input module comprises a light source, an optical parametric oscillation unit and an optical parametric amplification unit which are sequentially arranged along a light path; the optical parametric oscillation unit is used for enabling pump light generated by the light source to generate a nonlinear process to obtain signal light and idle light, the optical parametric amplification unit is used for amplifying the signal light or the idle light, and the light outlet sides of the two input modules are respectively provided with a frequency doubling crystal and a rectangular prism. The frequency doubling crystal is used for carrying out frequency doubling on the amplified signal light or idle light to obtain first frequency mixing light, and the rectangular prism is used for carrying out time delay on the amplified signal light or idle light to obtain second frequency mixing light; the frequency mixing module comprises a gas frequency mixing pool, the gas frequency mixing pool uses a four-wave frequency mixing mechanism to carry out frequency mixing output on the first frequency mixing light and the second frequency mixing light, vacuum ultraviolet light is obtained, and the all-solid-state vacuum ultraviolet light source which is compact in structure and stable in output is achieved.

The utility model discloses a picosecond optical fiber optical parametric oscillator based on acousto-optic wavelength tuning, which comprises an embedded integrated control platform, and the embedded integrated control platform controls a mode-locked laser seed source, a narrow-spectrum high-power tunable pumping source and an optical fiber optical parametric resonant cavity in a coordinated manner. The mode-locked laser seed source adopts a mode-locked laser oscillator as a seed source, a tunable spectrum filter and a laser amplifier are arranged behind the mode-locked laser seed source, and the tunable spectrum filter can also be arranged in a resonant cavity of the mode-locked laser oscillator. And a laser amplifier is arranged behind the mode-locked laser oscillator to obtain narrow-spectrum high-power tunable pulse laser. According to the utility model, based on a laser saturation gain amplification process of bi-pass filtering, narrow-spectrum, high-power and picosecond pulse laser output with an adjustable central wavelength of 1035-1065 nm is realized, and based on an optical fiber optical parametric oscillation process, high-power, narrow-spectrum and picosecond pulse laser output with a rapidly adjustable central wavelength of 785-985 nm is realized.

The invention discloses a low-heat-effect self-optical parametric oscillation laser based on an ytterbium ion doped crystal, which relates to the technical field of laser, and comprises a pumping source, a focusing system, an input mirror, the ytterbium ion doped crystal and an output mirror which are sequentially arranged along the direction of an optical path, wherein the ytterbium ion doped crystal is a functional composite crystal capable of simultaneously realizing fundamental frequency optical gain and optical parametric oscillation, and the input mirror and the output mirror form a self-optical parametric oscillation laser resonant cavity. Compared with a traditional self-optical parametric oscillation laser, the self-optical parametric oscillation laser has the advantages that the heat production proportion of the laser is reduced from 25.5% to 11.3%, the heat effect is remarkably reduced, and the power stability of the laser is improved. The self-optical parametric oscillator has the advantages of being simple in structure, small in size, low in heat effect, high in stability and the like, and solves the problems that a traditional optical parametric oscillator is complex in structure and a self-optical parametric oscillator generates heat seriously.

The application discloses a kind of dual-band near-infrared pulse lasers, belong to laser technical field, including pump source, coupling optical system, pump light module, pulse light module, light parametric oscillation module and output mirror.Pump source is connected coupling optical system, pump light module, pulse light module, light parametric oscillation module and output mirror in sequence.The 443nm laser generated by pump source is under the action of coupling optical system and pump light module to output pump light, under the action of output mirror to generate 522nm fundamental frequency laser, under the action of pulse light module to output 522nm pulse laser, under the action of light parametric oscillation module to output 800nm and 1502nm laser to output mirror, and output to cavity outside via output mirror to form near-infrared band dual-band laser output.The dual-band near-infrared pulse laser of the application simplifies light-light conversion process, thereby reducing device unit, so that laser is smaller and lighter in weight.Meanwhile, the light-light conversion efficiency of the dual-band near-infrared pulse laser of the application is higher.

The invention discloses an oscillation mode optical parameter chirped pulse amplification laser and method. The core of the system is to construct a composite resonant cavity, and the cavity partially shares a key optical element, so that the resonant cavity of the slab regenerative amplifier and the resonant cavity of the synchronous pump optical parametric oscillator (OPO) are physically coupled. The specific scheme is as follows: a broadened picosecond chirp seed pulse is injected into a regenerative amplifier for energy amplification; the method is characterized in that the amplified high-energy chirped pulse is directly used as pump light, and the pump light is embedded in a common nonlinear crystal in the composite cavity to excite optical parametric oscillation. Two processes of'chirp pulse regenerative amplification 'and'synchronous pump optical parametric oscillation' are synchronously generated in a composite resonant cavity which is overlapped in time and space, so that energy is circularly extracted from chirp pump light in multiple oscillation processes of OPO signal light, and a unique'oscillation mode OPCPA 'is formed.

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 invention discloses a dual-channel four-wavelength laser system, a detection device and a control method, the dual-channel four-wavelength laser system comprises a beam splitting module and two optical parametric oscillation modules, the beam splitting module comprises a laser and a beam splitter, the laser is used for outputting pump light, and the beam splitter is used for splitting the pump light into two beams; each optical parametric oscillation module comprises a nonlinear optical crystal, an optical resonant cavity and a tuning assembly, the two beams of pump light perform nonlinear action in the two optical parametric oscillation modules respectively and independently so as to obtain output light respectively, and the tuning assembly is used for performing angle tuning on the nonlinear optical crystal and the optical resonant cavity; wherein a time delay assembly is arranged between one optical parametric oscillation module and the beam splitter, the time delay assembly is used for carrying out time delay on the second output light, and the output light of the two optical parametric oscillation modules is combined through the beam combiner and then is transmitted along the same light path. The laser system provided by the invention has the characteristics of compact structure, high response speed, wide wavelength switching range and capability of realizing multi-wavelength space overlapping output.