26 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 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.

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.

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.

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.

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 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.

The application discloses a small-sized and high-efficiency integrated ring-shaped optical parametric oscillator / amplifier, which combines the ring-shaped optical parametric oscillator technology and the optical parametric amplifier technology, amplifies the pump light and the signal light output by the ring-shaped optical parametric oscillator in the optical parametric amplifier, and designs the pump light and the signal light into an integrated ring-shaped structure with a collinear pumping mode, so that the conversion efficiency is remarkably improved and the size of the device is greatly simplified; meanwhile, due to the adoption of the oscillation and amplification technology, the output signal light beam quality of the application is obviously superior to that of a single polycrystal optical parametric oscillator, and the requirements of military laser on size, beam quality and efficiency and the like can be met.

This invention proposes a system and method for generating ultra-intense broadband terahertz waves using a structured, diffraction-free, chirped femtosecond laser. In the system, a first femtosecond laser emitted by a femtosecond laser is split by a beam splitter to obtain a pump beam and a probe beam. An optical parametric amplifier modulates the pump beam into a second femtosecond laser, which, after passing through a laser pulse shaper, outputs a chirped-modulated third femtosecond laser. A reflective spatial light modulator converts and reflects the incident third femtosecond laser, and the reflected fourth femtosecond laser is reflected by a second mirror to a first off-axis parabolic mirror. After focusing, it is incident on a BBO crystal, converting part of the light into a second harmonic wave. The remaining light from the fourth femtosecond laser, along with the second harmonic wave, is focused into air, generating air plasma. The air plasma radiates terahertz waves. These terahertz waves are incident on a second off-axis parabolic mirror and reflected as collimated terahertz waves. This invention generates ultra-intense broadband terahertz waves with flexible spectral polarization control.

The invention discloses an optical parametric oscillation amplifier with wide tuning, large energy and high light beam quality. The optical parametric oscillation amplifier comprises a 1064nm pumping source, a light beam regulating and shaping module, an optical parametric oscillator and an optical parametric amplifier. The regulation and shaping module realizes independent and accurate regulation of total energy of pump light and splitting ratios of two paths leading to an oscillator and an amplifier through combination of at least two sets of half-wave plates and a polarization beam splitter; the optical parametric oscillator comprises two nonlinear crystals which are placed in a plane-plane resonant cavity in a walk-off compensation mode and are used for generating tunable seed light; and the optical parameter amplifier receives the seed light and the other path of pump light, and amplifies the seed light by using two amplification crystals placed in a walk-off compensation mode. Through the specific structure, the problem that wide tuning, large energy and high beam quality are difficult to consider at the same time is solved, high-precision continuous tuning can be achieved in the human eye safe wave band of 1535-1578 nm, large-energy and high-beam-quality laser output is obtained, and the laser is suitable for the fields of laser remote sensing, laser radar and the like.