35 results about "Optical parametric amplifier" patented technology

Methods and systems are presented for using optical parametric amplifiers in various ways that enhance a native quadratic coupling strength so that a photonic component of interest can be measured or otherwise observed without demolishing the component of interest at a system output. For example such components may include a number of signal Bogoliubov excitations, a pump modular quadrature, or a signal quadrature squared.

The waveguide carrying a nonlinear crystal with reflective interface, a pump photon source and a circulator define an optical parametric amplifier which uses optical power from the pump photons to boost incoming signal and idler photons which carry the encoded signal. The nonlinear crystal performs optical parametric amplification upon the incoming optical signal in a quantum photonic process that generates additional signal and idler photons to thereby boost the intensity of the incoming signal. A photodetector is coupled for communication with the third port and operative to convert the reflected optical signal into an electrical signal defining the output of the communications receiver.

The invention discloses a CARS-LA-ICP-MS combined multimode analysis system. The CARS-LA-ICP-MS combined multimode analysis system comprises a fusion light path module, a mass spectrometry gas path module, a three-dimensional mobile station, a CARS signal acquisition system and a computer control system, the fusion light path module comprises a laser source, an optical parameter amplifier, a light pulse time delay system, three dichroscopes, a light beam adjusting system, a galvanometer, a movable objective lens and a camera; the mass spectrometry gas circuit module comprises a carrier gas supply device, a multimode analysis sample cell and a mass spectrometry device; the multimode analysis sample cell comprises an upper cover, a lower cover and a side wall shell. On the other hand, the invention discloses an analysis method which comprises initialization setting, CARS analysis, mass spectrum analysis task parameter setting, laser ablation mass spectrum analysis and data synthesis. Through coaxial optical path design and an intelligent algorithm, deep fusion of chemical imaging and elemental analysis is realized, and a brand new research tool is provided for the fields of life science, material science and the like.

A laser system for multiphoton microscopy comprises a seeder oscillator, fast modulator, amplifier, second modulator, and optical parametric amplifier configured to produce pulses with variable pulse spacing temporally synchronized to a scanner having sinusoidal motion. The variable pulse spacing ensures each pixel receives substantially the same number of laser pulses, eliminating uneven energy distribution of fixed repetition rate systems. The scanner operates at 4-12 kHz frequencies while the seeder oscillator produces femtosecond pulses at 10-100 MHz with 10-100 ns pulse spacing. The optical parametric amplifier outputs wavelengths from 600-1900 nm, with 1300-1700 nm optimized for three-photon microscopy. Methods include synchronizing pulse timing to scanner motion and varying interpulse intervals across scan lines. For 8 kHz scanners with 512 pixels per line, the system achieves 32% energy reduction compared to constant pulse spacing while maintaining 100-150 mW average power on biological samples, preventing thermal damage and enabling video rate imaging.

This invention discloses a two-dimensional infrared spectroscopy system and its detection method that combines acid-base step and pulsed heating. The system includes a femtosecond laser, an optical parametric amplifier and difference frequency generator, a frequency divider, an electronic time delay generator, a nanosecond laser, a detachable optical parametric oscillator providing 355nm light pulses, an optical parametric oscillator providing 2020nm light pulses, a monochromator and a mercury cadmium telluride array detector, an integrator and data acquisition card, a computer, a chopper, a time-resolved pulse generation chamber, and a sample chamber. This invention retains the original pulsed heating trigger mode by using a nanosecond light source with a detachable optical parametric oscillator providing 355nm light pulses. It achieves convenient switching between the acid-base step and pulsed heating modes through a dichroic mirror and a reversible reflector. Before and after switching, the propagation direction of the nanosecond pulses is completely consistent, and the relative time delay is corrected by the electronic time delay device.

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.

A laser system includes a first laser outputting first laser light, an optical intensity changer outputting first pulse laser light, a modulator widening spectral linewidth of the first laser light or the first pulse laser light, an optical fiber amplifier amplifying the first pulse laser light and outputting second pulse laser light, a second laser outputting second laser light, an optical parametric amplifier amplifying the second laser light and outputting third pulse laser light, a wavelength converter outputting fourth pulse laser light using the second and third pulse laser light, an amplification section amplifying the fourth pulse laser light and outputting fifth pulse laser light, and a processor controlling a modulation signal such that the fifth pulse laser light having target spectral linewidth is generated, and controlling the center wavelength of the second laser light such that the fifth pulse laser light having a target center wavelength is generated.

The application provides a femtosecond laser electron dynamic control phase change material cross-scale modulation device and method, and the device comprises a femtosecond laser, a first beam splitter, a frequency doubler, a fold mirror, a first ultrafast mirror, a second ultrafast mirror, a third ultrafast mirror, a fourth ultrafast mirror, a fifth ultrafast mirror, a sixth ultrafast mirror, a collinear optical parametric amplifier, a beam reducer, a time-domain shaping module and a descending light path; the femtosecond laser generates laser pulses, which are divided into pump light and probe light through the first beam splitter; the pump light is focused on the surface of a sample to be measured after processing; the probe light is focused on the surface of the sample to be measured after processing, and a collection signal is obtained. The application realizes the superposition of the functions of two types of devices, i.e. an ultrafast optical switch and an optical storage, and overcomes the difficulty in integrating optical and electrical devices with different response times in different scales due to different response principles. The application has important application value in the integration and miniaturization of optical and electrical devices.

The invention discloses an ultra-short pulse optical parametric oscillator based on a bicrystal structure, and relates to a laser and an assembly, and the oscillator comprises a first beam shaper (2) which is used for shaping idler frequency light (1); a second beam shaper (4) for shaping the pump light (3); a dichroscope (5); the first nonlinear crystal (6) is arranged on a light emitting path of the dichroscope (5), and the first nonlinear crystal (6) is used as an input coupling mirror of the optical parametric oscillator; the second nonlinear crystal (7) is arranged on a light emitting path of the first nonlinear crystal (6), and the first nonlinear crystal (6) and the second nonlinear crystal (7) form a resonant cavity; and the three-direction color mirror (9) is arranged on a light emitting path of the second nonlinear crystal (7) and is used for separating the pump light, the signal light (8) generated by nonlinear frequency conversion and the amplified idle frequency light (1) and transmitting and outputting the idle frequency light. The conversion efficiency of the optical parameter amplification process is improved, and the overall amplification performance of the optical parameter amplifier is guaranteed.

The application discloses a rare earth magnesium gallium sulfur bifunctional material, a crystal thereof, a preparation method and application. The material has a chemical formula of LnMg6Ga6S 16 , wherein Ln is Nd or Sm, is crystallized in a hexagonal crystal system, and has a space group of P-6; the unit cell parameters of NdMg6Ga6S 16 are a=b=16.6585 Å, c=7.4046 Å; the unit cell parameters of SmMg6Ga6S 16 are a=b=16.653 Å, c=3.702 Å. The material has nonlinear optical performance and near-infrared luminescence performance. The polycrystalline powder of the material can be prepared by a vacuum high-temperature solid phase reaction method, and the crystal can be grown by a high-temperature melt method or a crucible lowering method. The obtained crystal can be used for preparing nonlinear optical devices such as a laser frequency doubling generator, a frequency converter, an optical parametric oscillator or an optical parametric amplifier, and can also be used for preparing near-infrared luminescence devices such as a near-infrared luminescence diode or a near-infrared laser.

Examples of a 2´2 optical hybrid receiver for entanglement-assisted communication are disclosed indicating that the examples of the receiver have roughly 10% lower error probability compared to previously proposed optical parametric amplifier-based receivers for more than 10 modes. Numerical findings indicated that surpassing the Holevo and Homodyne capacities does not require a large number of signal-idler modes. In addition, findings indicated that using unequal priors for Binary Phase-Shift Keying (BPSK) provides roughly three times the information rate advantage over.

An optical parametric amplifier may include a waveguide with a waveguide geometry. The optical parametric amplifier may also include an optical pump optically coupled to the waveguide, the waveguide may be configured to use the optical pump and the waveguide geometry to temporally gain trap and perform phase sensitive parametric amplification of an optical signal.

The invention relates to a high-repetition-frequency narrow-pulse-width 1645nm non-planar laser, which comprises three parts, namely a pump laser injection system, a seed laser injection system and a spatial four-mirror-cavity optical parametric oscillator system. The laser has the advantages that the beam quality is high, the injection energy of the pump light is adjustable, the injection light spots and the power density of the pump light and the seed light are adjustable, the service life of the nonlinear crystal is long, the tuning range is wide, and three wavelengths are output; the high-repetition-frequency large-pulse-energy high-beam-quality laser light source can be widely applied to a plurality of applications such as laser radar systems, remote sensing, telemetering and range finders, and is an important laser light source.

The application relates to the field of laser technology and discloses a wavelength stable output method of a femtosecond laser pumped optical parametric amplifier. The method realizes real-time acquisition of a full spectrum of pump laser by a spectrometer, calculates a spectral barycenter frequency of the pump laser, combines a signal light frequency fed back by a wavemeter, constructs a double-variable deviation input, generates a phase matching angle correction amount by using a pre-trained neural network model, drives a piezoelectric ceramic platform to dynamically adjust the angle of a nonlinear crystal, and maintains a phase matching condition of Delta k=0. The application synchronously monitors the full spectrum spectral barycenter of the femtosecond pump laser and the output wavelength of signal light, constructs a double-variable feedback mechanism for a wide spectrum pump source, and breaks through the limitation that traditional single-point frequency locking technology can only stabilize a single frequency.

The application discloses a quantum interferometer for simultaneously amplifying signals and reducing noises, comprising a light source, a first non-degenerate optical parametric amplifier, a second non-degenerate optical parametric amplifier, a first degenerate optical parametric amplifier, a second degenerate optical parametric amplifier, a phase sensor and a measurement system; two polarized lights with perpendicular polarization directions are injected into the interferometer by the first non-degenerate optical parametric amplifier and have quantum correlation characteristics; the two light fields are respectively passed through the first and second degenerate optical parametric amplifiers to further improve the quantum characteristics, and one of the two light fields is phase-shifted by a physical quantity to be measured and then interfered in the second non-degenerate optical parametric amplifier, and the orthogonal components of the output light field contain the relative phase difference signal introduced by the physical quantity to be measured. The application simultaneously realizes the deterministic amplification of the measured signal in the interferometer and the noise reduction of the detection light field by using the cascade of the non-degenerate and degenerate optical parametric amplifiers, can realize the phase measurement with super-high sensitivity, and has important application value.

A stimulated Raman photothermal (SRP) microscope for imaging a sample. A first optical source without an optical resonator emits a pump beam. A second optical source emits an intensity-modulated Stokes beam. The Stokes beam is combined with the pump beam to form a combined beam. The combined beam is directed to the sample to induce a thermal effect caused by the stimulated Raman process. A third optical source emits a probe beam, the probe beam is directed to the sample. An optical detector detects modulation of the probe beam after modulation by the sample to measure an SRP signal. Because noise in the pump and Stokes beam do not significantly effect the measurements from the probe beam, these beams can use a high-powered optical parametric amplifier (OPA) source for improved sensitivity and imaging speed compared to SRP microscopes using an optical parametric oscillator (OPO) source.

Examples of a 2´2 optical hybrid receiver for entanglement-assisted communication are disclosed indicating that the examples of the receiver have roughly 10% lower error probability compared to previously proposed optical parametric amplifier-based receivers for more than 10 modes. Numerical findings indicated that surpassing the Holevo and Homodyne capacities does not require a large number of signal-idler modes. In addition, findings indicated that using unequal priors for Binary Phase-Shift Keying (BPSK) provides roughly three times the information rate advantage over.

Examples of a 2´2 optical hybrid receiver for entanglement-assisted communication are disclosed indicating that the examples of the receiver have roughly 10% lower error probability compared to previously proposed optical parametric amplifier-based receivers for more than 10 modes. Numerical findings indicated that surpassing the Holevo and Homodyne capacities does not require a large number of signal-idler modes. In addition, findings indicated that using unequal priors for Binary Phase-Shift Keying (BPSK) provides roughly three times the information rate advantage over.

A system and methods for low noise multi-channel optical signal amplification using an optical parametric amplifier are described. A waveguide etched into a ϰ(2) nonlinear optical material, such as thin film lithium niobate (TFLN), provides confined optical parametric amplification using a pump laser to amplify multi-channel optical signals of lower energy. Noise and crosstalk between channels within the OPA waveguide amplifier can be reduced if the OPA waveguide physical dimensions, along with the optical properties of the waveguide material, are adjusted to create a group velocity mismatch (GVM) between the propagating pump light and the amplified signal channels. OPA waveguide designs with larger GVM reduces crosstalk between modes in the waveguide, reducing noise, as measured by the error vector magnitude (EVM), and improving signal fidelity for the amplified optical signals.

This invention relates to the field of optical detection technology, specifically providing a coherent anti-Stokes Raman scattering imaging method and apparatus, comprising: splitting an initial light emitted from a driving light source into a driving light and a Stokes beam; processing the driving light into a signal light based on an optical parametric amplifier; performing pulse broadening processing on the signal light in a first optical path, or performing pulse broadening processing on the Stokes beam in a second optical path; combining the signal light and the Stokes beam into a third optical path, and performing pulse broadening processing on the signal light and the Stokes beam in the third optical path to obtain chirped signal light and Stokes beam; and performing coherent anti-Stokes Raman scattering imaging on a target sample based on the chirped signal light and the Stokes beam. This addresses the problem that related technologies cannot simultaneously achieve high-quality and fast hyperspectral imaging.

The present invention discloses a multi-longitudinal mode blue light ocean high spectral resolution lidar transmitter system, comprising a narrow linewidth single longitudinal mode pulse laser, an adjustable polarization beam splitter, a parallel plane cavity optical parametric oscillator, an optical parametric amplifier, a laser frequency doubler, and a laser beam expander; the pulsed pump light emitted by the narrow linewidth single longitudinal mode pulse laser is divided into two beams of unequal energy by the adjustable polarization beam splitter; the low-energy pulsed pump light is injected into the parallel plane cavity optical parametric oscillator and converted into a fundamental frequency multi-longitudinal mode pulse signal light, which is simultaneously injected into the optical parametric amplifier together with the high-energy pulsed pump light to further increase the signal light energy; the laser frequency doubler then generates a multi-longitudinal mode blue light band detection laser, which is finally output to the laser beam expander to adjust the divergence angle and then injected into the target water body. The present invention can significantly reduce the dependence on seed lasers of special working bands and can also select a detection wavelength with better remote sensing measurement effect to construct a transmitter system.

An optical parametric amplifier including an amplifier crystal and a mirror arrangement having a plurality of mirrors. The mirror arrangement has an in-coupling mirror and an out-coupling mirror. Pump light is coupled into the mirror arrangement via the in-coupling mirror. Signal light and idler light are generated in the amplifier crystal by means of the pump light. The signal light leaves the mirror arrangement via the out-coupling mirror. The pump light is directed several times through the amplifier crystal in the mirror arrangement. Pomp light and signal light are guided collinearly in the mirror arrangement.

Methods, systems and methods for reducing temporal coherence of laser systems are described. One example laser system includes a seed laser having a continuous wave output and operable at a first wavelength, a phase modulator positioned to receive laser light from the seed laser and to impart phase modulation to the seed laser. The laser system also includes an optical parametric amplifier positioned to receive phase-modulated laser light at one of its inputs and a pump laser light at another input, and to produce an output beam having spectral characteristics of the phase-modulated laser light that is amplified according to a temporal feature of the pump laser light. In the example laser system, an output of the optical parametric amplifier has a lower temporal coherence compared to the seed laser.

The invention relates to the technical field of optical detection, and particularly provides a coherent anti-Stokes Raman scattering imaging method and device, and the method comprises the steps: splitting initial light emitted by a driving light source into driving light and Stokes light; processing the driving light into signal light based on an optical parameter amplifier; performing pulse broadening processing on the signal light on a first light path of the signal light, or performing pulse broadening processing on the Stokes light on a second light path of the Stokes light; combining the signal light and the Stokes light to a third light path, and performing pulse broadening processing on the signal light and the Stokes light on the third light path to obtain the signal light and the Stokes light with matched chirp rates; and performing coherent anti-Stokes Raman scattering imaging on the target sample based on the signal light and the Stokes light which are matched with the chirp rate. The problem that the hyperspectral imaging quality and the hyperspectral imaging speed cannot be considered at the same time in the prior art is solved.

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 application discloses a CARS-LA-ICP-MS combined multi-mode analysis system, which comprises a fusion optical path module, a mass spectrum analysis gas path module, a three-dimensional moving table, a CARS signal acquisition system and a computer control system; the fusion optical path module comprises a laser source, an optical parametric amplifier, an optical pulse time delay system, three dichroic mirrors, a light beam adjusting system, a galvanometer, a moving objective and a camera; the mass spectrum analysis gas path module comprises a carrier gas supply device, a multi-mode analysis sample pool and a mass spectrum analysis device; the multi-mode analysis sample pool comprises an upper cover, a lower cover and a side wall shell. The application discloses another aspect of an analysis method, which comprises initialization setting, CARS analysis, mass spectrum analysis task parameter setting, laser ablation mass spectrum analysis and data synthesis. Through coaxial optical path design and intelligent algorithm, the application realizes deep fusion of chemical imaging and element analysis, and provides a new research tool for the fields of life science, material science and the like.

The application provides a micro-transient absorption spectrum measurement system, comprising: a measurement light source; a first semi-transparent semi-reflective mirror which splits light after receiving the light beam; an excitation light path comprising an optical parametric amplifier and a first focusing lens, wherein a vertical light beam is focused on a sample to be measured after passing through the optical parametric amplifier and the first focusing lens; a detection light path comprising a second focusing lens, a nonlinear crystal, a first band-pass filter, a first off-axis parabolic mirror and a second off-axis parabolic mirror, wherein a horizontal light beam is focused on the sample to be measured after passing through the second focusing lens, the nonlinear crystal, the first band-pass filter, the first off-axis parabolic mirror and the second off-axis parabolic mirror; and a measurement assembly comprising a collimating lens and a spectrometer, wherein focused detection light passes through the sample to be measured and then enters the spectrometer through the collimating lens to be measured. The micro-transient absorption spectrum measurement system provided by the application is based on an off-axis parabolic mirror, is suitable for an incident light beam with a large incident spot area and a wide spectral range, and can significantly reduce the cost.

The application discloses a kind of single-pulse broadband circular dichroism absorption measurement device for femtosecond time-resolved spectroscopy, it is related to optical measuring instrument technical field, including: femtosecond laser, output light is divided into pump light and probe light two parts;Pump light path module, including optical parametric amplifier or nonlinear frequency doubling module, polarization modulation device and chopper, for adjusting pump light to circularly polarized light and its frequency is reduced to one half of femtosecond laser frequency;The single-pulse broadband circular dichroism absorption measurement device for femtosecond time-resolved spectroscopy, before sample probe light is vertical direction or horizontal direction linearly polarized light, in the propagation process will not be influenced by the reflectivity of optical element to vertical polarization light and horizontal polarization light different.The two beams of light separated can realize self-reference and improve signal-to-noise ratio, and avoid using beam splitting optical element and affect the accuracy of polarization state. Avoid using active optical modulation element to reduce the damage risk of equipment and device.

Aspects of the present disclosure generally relate to two-dimensional electronic apparatuses and methods of use. A two-dimensional electronic sum frequency generation (2D-ESFG) apparatus includes an amplifier including a laser source. A broadband optical parametric amplifier (BOPA) is optically coupled to the amplifier. The BOPA includes a two-stage amplifier. An etalon is optically coupled to the amplifier. The etalon includes two or more partially reflective substrate optical flats. A noncollinear optical parametric amplifier (NOPA) is optically coupled to the amplifier. A dispersive filter pulse shaper is optically coupled to the NOPA. A synchronizer including a galvanometer mirror is optically coupled to the BOPA, the etalon, and the dispersive filter pulse shaper. A detector is optically coupled to the synchronizer.

The invention relates to a sodium magnesium zinc hydroxycarbonate ultraviolet nonlinear optical crystal and a preparation method and application thereof, the chemical formula of the crystal is Na2Mg0. 34Zn0. 66C2O7H2, the crystal belongs to a tetragonal system, the space group is P-4 (No.81), and the crystal belongs to a non-centered space group; the cell parameters are as follows: a = 7.4555 (2), b = 7.4555 (2), c = 5.7592 (3), alpha = beta = gamma = 90 degrees, Z = 2, and unit cell volume V = 320.12 (2) 3. The sodium-magnesium-zinc hydroxycarbonate ultraviolet nonlinear optical crystal provided by the invention has a broad band gap of 5.65 eV, a corresponding ultraviolet cutoff edge of 219.64 nm, a birefringence of about 0.055 at 248nm, and good phase matching capability in an ultraviolet region; the theoretical frequency multiplication coefficient of the crystal is more than two times that of a KDP crystal, and the crystal is good in mechanical property, stable in air and not prone to deliquescence. Meanwhile, the crystal is simple in preparation process, relatively low in cost and environment-friendly in raw material, has good application potential in preparation of laser harmonic generators, optical parametric amplifiers and optical waveguide devices, and can realize output of deep ultraviolet laser with the wavelength less than 400nm.