51 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 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.

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.

The invention belongs to the field of laser microdissection, and relates to a laser microdissection system based on coherent Raman imaging and application thereof.The device comprises a femtosecond laser, a beam splitter, a dichroscope and a laser scanning microscope, and a pump light path and a Stokes light path are arranged between the beam splitter and the dichroscope; an optical parametric amplifier and a movable dispersion broadening module are arranged in the pump light path; the Stokes light path is internally provided with a Martin inner z stretcher; a femtosecond laser beam is split through a beam splitter and then enters a pump light path and a Stokes light path, one beam generates wavelength-tunable first pump light through an optical parametric amplifier, and the other beam generates Stokes light through the Stokes light path; the first pump light and the Stokes light are combined in the dichroscope, and the laser scanning microscope is used for carrying out coherent Raman imaging by using the combined light and is also used for carrying out laser microdissection according to a coherent Raman image. According to the invention, the accuracy, selectivity and real-time performance of the laser microdissection process can be obviously improved.

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.

Embodiments of the present application disclose an optical signal replication device and an optical parametric amplifier, which are applied to the communication field. In the embodiments of the present application, the optical signal replication device included in the optical parametric amplifier generates an invalid signal during the process of transmitting the signal light and the pump light. The optical signal replication device can separate the signal light from the invalid signal and then transmit it to the signal processing module. In this way, the signal processing module can directly process the signal light that does not include the invalid signal, and the invalid signal will not occupy the transmission bandwidth of the optical parametric amplifier, so the effective transmission bandwidth of the optical parametric amplifier is relatively large.

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 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.

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.

The present invention provides a wavelength-tunable laser (WTL) delivering high-average power and / or high-pulse energy that is wavelength-tunable in a continuous manner over larger portions of the visible and / or near-infrared and / or mid-infrared spectra. The WTL uses a laser source at a given wavelength (1ω) generating short, high peak power laser pulses for injecting a photonic crystal fiber (PCF) and for pumping an optical parametric amplifier (OPA). The PCF generates a supercontinuum (SC) seed, which is delivered to the OPA. Phase-matched band of the SC seed is amplified by the OPA to a suitably high level. A delay line may be provided on the 1ω beam to synchronize the SC seed and pump pulses in the OPA. The OPA outputs include the amplified phase-matched band of the SC seed and an OPA idler. Wavelength tuning of the OPA outputs is preferably done by adjusting the angle of propagation in the crystal, which changes the phase matching condition. The 1ω wavelength may be selected from the range from about 1 μm to about 3 μm. In another embodiment, the 1ω wavelength is frequency doubled to 2ω prior to pumping the OPA. In yet another embodiment, the 1ω wavelength is frequency tripled to 3ω prior to pumping the OPA.

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.

The invention discloses a quantum interferometer capable of simultaneously amplifying signals and reducing noise. The quantum interferometer comprises a light source, a first non-degenerate optical parameter amplifier, a second non-degenerate optical parameter amplifier, a first degenerate optical parameter amplifier, a second degenerate optical parameter amplifier, a phase sensor and a measuring system. Two beams of polarized light which is vertical to each other are injected into the interferometer by the first non-degenerate optical parametric amplifier and have quantum correlation characteristics; the quantum characteristics of the two light fields are further improved through the first degenerate optical parameter amplifier and the second degenerate optical parameter amplifier respectively, one light field is interfered in the second non-degenerate optical parameter amplifier after being subjected to phase shift by a physical quantity to be measured, and an orthogonal component of the output light field contains a relative phase difference signal introduced by the physical quantity to be measured. The non-degenerate optical parametric amplifier and the degenerate optical parametric amplifier are cascaded, deterministic amplification of a measured signal in the interferometer and noise reduction of a detection light field are achieved at the same time, ultra-high-sensitivity phase measurement can be achieved, and important application value is achieved.

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.

The invention relates to a quantum interferometer network based on a mode entangled state. The technical problem that the average phase sensitivity of existing distributed quantum sensing is extremely low in phase measurement is mainly solved. According to the technical scheme, the device comprises a light source unit, an optical parameter amplifier, a beam splitter network, an interferometer and a measuring system; probe light S and pump light p generated by the light source unit are input to a first input end and a second input end of the optical parameter amplifier; local oscillation light and coherent light c generated by the light source unit are input to a first input end and a second input end of the beam splitter network, and compressed light sq generated by the optical parameter amplifier is connected with a third input end of the beam splitter network. The eleventh to sixteenth output ends of the beam splitter network are respectively connected with the eleventh to sixteenth input ends of the measuring system, the 21st to 26th and the 31st to 36th output ends of the beam splitter network are respectively connected with the first and second input ends of the interferometer, and the output end of the interferometer is connected with the 21st to 26th input ends of the measuring system.