67 results about "Raman laser" patented technology

The invention provides a tip Raman-based metal oxide nanoparticle in-situ detection method, which comprises: S1, dispersing metal oxide nanoparticles in a nanoparticle dispersion liquid, focusing laser to the tip of a nanometer tip through an objective lens, capturing a single nanoparticle by using an optical tweezers technology, and attaching the single nanoparticle to the nanometer tip; s2, focusing Raman laser on a nano needle tip-particle interface, generating a local high-temperature field through a photo-thermal near-field coupling effect, triggering a thermal chemical reaction of nano particles, and synchronously collecting a Raman spectrum; and S3, carrying out pretreatment and characteristic peak analysis on the collected Raman signal of the Raman spectrum, and determining the reaction critical temperature and the dynamic process in combination with temperature calibration data. According to the invention, capture and accurate heating of the nanoparticles are realized through photo-thermal coupling of the optical tweezers and the needle tip, and thermal chemical reaction monitoring of the nanoparticles is realized.

The invention discloses a cold atom interference type low-frequency vibration measurement device and a measurement method, and solves the problems that the existing cold atom interference gravimeter measurement equipment is limited by the performance of a vibration sensor, the compensation precision is insufficient, timing calibration is needed, and the measurement precision is low. And measurement errors generated by gravity and ultralow-frequency vibration cannot be effectively separated from a measurement result of the cold atom interference gravimeter, namely, decoupling of two measurement parameters is realized, and cold atom interference measurement of low-frequency vibration is realized. The measuring device comprises a Raman laser output system, a vacuum cavity, a sensitive axis converter and a vibration detection reflecting mirror, the Raman laser output system outputs two pieces of Raman laser which have the same polarization state and are both circular polarization states; the low-frequency vibration is transmitted to the liquid crystal phase modulator through the vacuum cavity for polarization state conversion, and then is reflected to the liquid crystal phase modulator or the vibration detection reflector through the polarization splitting prism, so that the interference type low-frequency vibration of the cold atoms is measured, and decoupling of the two is realized.

The present invention relates to a method for separating and enriching a chlorine-37 isotope using a laser photochemical reaction and, specifically, to a method for separating and enriching a high-purity chlorine-37 isotope, which is essential for a next-generation molten chloride fast reactor (MCFR) and the like, by selectively photolyzing specific isotopic molecules of iodine monochloride (ICl) using a high-power fiber laser or a solid-state Raman laser and reacting same with a radical scavenger to effectively terminate a chain reaction. Accordingly, by employing, as a light source, a single-frequency fiber laser or a solid-state Raman laser that has higher power efficiency and easier maintenance than conventional dye lasers and is capable of achieving high power of several kW or more through modular expansion, mass production on an industrial scale can be realized and the economic feasibility of the process can be significantly secured.

The invention relates to the technical field of in-situ Raman monitoring microwave plasma chemical vapor deposition devices, and particularly discloses diamond growth in-situ Raman test equipment and a Raman test method, the Raman test equipment comprises a growth device and a Raman laser test device; a detection window is arranged on an upper cover of a reaction chamber of the growth device, and a Raman laser testing device with a height adjusting mechanism, an angle adjusting mechanism and a distance measuring adjusting mechanism is arranged on the outer side of the detection window. The three mechanisms cooperate to accurately focus a laser beam on a diamond wafer edge strongest signal area on a deposition table at an optimal incident angle and an optimal working distance; according to the method, in the process of growing the diamond through microwave plasma chemical vapor deposition, Raman spectrums are collected and analyzed in real time, and technological parameters are dynamically fed back and optimized. And finally, high signal-to-noise ratio, in-situ and real-time monitoring and accurate control of the diamond growth process in a high-temperature plasma environment are realized.

The application belongs to the technical field of spectral detection, and specifically discloses a kind of characterization methods of fuel cell membrane electrode interface working condition Raman signal, comprising the following steps: constructing fuel cell suitable for Raman test, preparing membrane electrode, assembling fuel cell, assembling in-situ Raman spectrum detection device, detecting fuel cell membrane electrode Raman signal.The application constructs fuel cell window piece, and makes laser passage by constructing window piece, optimizes flow field plate structure and material, avoids the problem that Raman laser cannot be focused due to too large distance from window piece to membrane electrode and the problem that operation platform is unstable due to too heavy weight of fuel cell, and can detect membrane electrode spectral information;The application can be applied to signal detection in different electrocatalytic reaction processes of membrane electrode cathode and anode, thereby providing guidance for the design of electrocatalyst.

The application discloses a method for measuring a detection tilt angle of a two-component atomic shearing interferometer, constructs a tilt angle set of a swing angle device; the angle of a mirror is turned between the time when atoms are subjected to the action of a pi Raman laser and a second pi / 2 Raman laser; a plurality of groups of odd number and even number are alternately detected; all tilt angles in the tilt angle set are traversed; and the actual included angle of the longitudinal direction of a CCD camera imaging surface relative to the Z-axis direction is calculated by fitting. The application also discloses a measuring device for the detection tilt angle of the two-component atomic shearing interferometer. The application enables the current atomic shearing interferometer to accurately measure the tilt angle of the detection system, thereby solving the problems of noise and system error caused by the non-zero return of the tilt angle of the detection system of the atomic shearing interferometer, and suppressing the drift of the differential measurement of the two-component atomic interferometer caused by the change of the tilt angle.

The invention discloses a Raman beam combination laser amplifier, relates to the technical field of laser, and aims to solve the problem of low conversion efficiency of an existing beam combination laser amplifier. A first bowl-shaped reflecting mirror and a second bowl-shaped reflecting mirror are coaxially arranged at the two ends of a columnar reflecting mirror assembly, the concave surfaces face the columnar reflecting mirror assembly, and a Raman laser crystal is arranged in the columnar reflecting mirror assembly; seed light output by the seed light module enters the Raman laser crystal through the center of the first bowl-shaped reflector; and a plurality of beams of fundamental frequency light output by the plurality of fundamental frequency light modules are obliquely incident to the Raman laser crystal from the side surface of the columnar reflector assembly. Each beam of fundamental frequency light of the Raman beam combination laser amplifier can be reflected for multiple times in the amplifier and interacts with the seed light for multiple times, the conversion efficiency of the single beam of fundamental frequency light is improved, the adjustment difficulty of the fundamental frequency light module is low, and the Raman beam combination laser amplifier is suitable for integrated use.

The application discloses a high-power single-mode linear polarization Raman fiber laser based on a multimode optical fiber, and is characterized in that: a Raman gain medium of the laser is a single-clad circularly symmetric step-index distribution large-core multimode optical fiber; a base mode diameter of the step-index large-core multimode optical fiber is more than 65% of a core diameter; a Bragg fiber grating is inscribed in the core of the multimode optical fiber by using a femtosecond laser direct writing technology; a long axis of the grating region is coincided with a base mode field supported by the multimode optical fiber in a radial direction in space and length; the grating forms selective optical feedback only to the base mode in the cavity; a grating region with a difference between the long axis and the short axis forms selective feedback to one polarization state of the base mode; thus, the multimode optical fiber Raman laser effectively suppresses generation of mode instability at a high power level through active mode cleaning, and finally realizes near-diffraction-limited single-mode, high linear polarization and high-power Raman fiber laser output.

The invention relates to a double-path beam-combining Raman laser power time-sharing locking device and method, an acousto-optic modulator is used for dividing an optical signal emitted by a laser into a first optical path and a second optical path, a first power modulator and a first diaphragm are sequentially arranged along the first optical path, a second power modulator and a second diaphragm are sequentially arranged along the second optical path, and the acousto-optic modulator and the second diaphragm are sequentially arranged along the second optical path. The first light path and the second light path are intersected on the light combination prism, and the power detection assembly is arranged on an output light path of the light combination prism; the first diaphragm and the second diaphragm are alternately opened according to a preset time sequence, power monitoring is performed on the first optical path or the second optical path through the power detection assembly, and feedback adjustment of optical power is performed on the first optical path through the first power modulator according to a monitoring result. And according to the monitoring result, feedback adjustment of the optical power is carried out on the second optical path through a second power modulator, so that power locking of the first optical path and the second optical path is realized in a preset error range.

The invention relates to a real-time vibration compensation device and method for a cold atom gravimeter. The device comprises a Raman laser, a rubidium atomic group, a reflector, an accelerometer, an optical phase-locked loop module, an analog-to-digital converter, a reference clock source, a heteronuclear FPGA, a direct frequency generation module and an upper computer. Two pairs of Raman lasers oppositely act on a rubidium atomic group in the vertical direction, the accelerometer and the reflector are in rigid connection, analog differential signals of the accelerometer enter the analog-digital converter, converted digital signals enter the heteronuclear FPGA for digital calculation, and the reference clock source serves as clock signals of the digital circuit. A signal calculated by the heteronuclear FPGA enters the direct frequency generation module and is output to the optical phase-locked loop to control the phase of the Raman laser, and the heteronuclear FPGA communicates with the upper computer through TCP connection. The vibration real-time compensation device for the cold atom gravimeter is fully digital, and has the advantages of large dynamic range, low noise and high-precision phase synchronization compensation capability.

The application discloses a narrow linewidth tunable Raman laser and an emission method, relates to the field of Raman lasers, and comprises a half-wave plate, a pump source and a focusing lens which are arranged on the two sides of the half-wave plate, a laser resonant cavity is arranged on the other side of the focusing lens, a cavity locking frequency doubler is arranged on the other side of the laser resonant cavity, a shaping lens group is arranged between the laser resonant cavity and the cavity locking frequency doubler, a dichroic mirror is arranged on the other side of the cavity locking frequency doubler, the laser resonant cavity is arranged in a V-shaped cavity structure which is composed of an input mirror, an output mirror and a reflective blazed grating, a diamond crystal is arranged between the input mirror and the output mirror, and the reflective blazed grating is arranged below the diamond crystal. The stability of the laser resonant cavity is improved through the design of the cavity mirror, the wavelength adjustment is accurate to 0.01 nm, and the loss in the transmission process is reduced through the cavity locking frequency doubler of the ring-shaped cavity structure.

The application relates to a Raman laser carrier sideband ratio feedback control system and a control method thereof. The system is used for controlling an IQ modulator of a cold atom interferometer laser system. The control system comprises an F-P resonant cavity, which is used for receiving Raman laser output by the IQ modulator, and simultaneously adjusting the cavity length of the F-P resonant cavity in real time, so as to identify and output transmitted light of different frequency components to a photoelectric detector. The photoelectric detector is used for detecting the transmitted light of different frequency components, so as to output intensity signals of different frequency components to a calculation module. The calculation module is used for collecting the intensity signals of different frequency components, and calculating and outputting the Raman laser carrier sideband ratio to a feedback control module. The feedback control module is used for performing error feedback control on the IQ modulator according to the Raman laser carrier sideband ratio and a preset carrier sideband ratio expected value, so as to realize the locking control of the Raman laser carrier sideband ratio. The application can improve the measurement accuracy and long-term stability of the cold atom interferometer laser system.

The application belongs to the field of Raman laser, and particularly relates to a red-green-blue three primary color large pulse energy Raman laser, which comprises a pumping laser, a plano-convex lens A, a Raman cell and a plano-convex lens B, the pumping laser is a Nd:YAG pulse solid laser, a mixed gas of D2 and inert gas in the Raman cell is pumped by a doubled 532nm pulse laser, three times of focusing are carried out in the Raman cell, and finally first order Stokes red laser, first order anti-Stokes blue Raman laser and green pumping laser are simultaneously output, the pulse energy reaches above 140mJ, 50mJ and 140mJ respectively, and the peak power reaches 10MW level. The application has the advantages of simple structure, fast debugging, low cost and high peak power of output laser, and provides a Raman laser for generating red-green-blue three primary color laser with high cost performance and large pulse energy.

This invention provides a miniaturized high-pulse-energy Raman laser under vortex optical pumping conditions, relating to the field of Raman laser technology, and employing n 2 A square array of vortex phase plates serves as the optical element for generating vortex-pumped lasers. By adjusting parameters such as the topological charge of the array of vortex phase plates and the focal length of the array of short-focal-length lenses, the laser power density in the focal region is reduced. The focal region has n 2 A square array is arranged with ring-shaped light intensity distribution units, ensuring that the laser power density of each unit in the focal region is greater than the Raman laser generation threshold and less than the laser-induced breakdown threshold. Therefore, the total Raman laser energy is n times the Raman laser energy generated by each unit. 2 This technology ultimately enabled the output of high-energy, high-beam-quality Raman lasers, with Raman laser pulse energies reaching hundreds of millijoules or even joules.

The invention belongs to the technical field of Raman spectrum analysis, and particularly relates to an optical flow control Raman sensing chip based on an SERS substrate and a preparation method of the optical flow control Raman sensing chip. Comprising a first PDMS layer, a silicon-based optical waveguide layer and a second PDMS layer, the silicon-based optical waveguide layer is arranged on the top surface of the first PDMS layer, the silicon-based optical waveguide layer is provided with a top surface and two side surfaces, the second PDMS layer is located on the top surface and the side surfaces of the silicon-based optical waveguide layer, the surface, facing the side surface of the silicon-based optical waveguide layer, of the second PDMS layer is provided with a near-concentric cavity, and the near-concentric cavity is communicated with the silicon-based optical waveguide layer. The SERS composite layer is arranged in the near-concentric cavity, a reflecting film is arranged on the arc-shaped inner wall of the near-concentric cavity, a target solution is specifically combined with the SERS composite layer through the microfluidic channel, the SERS composite layer loaded with the target generates Raman laser under excitation of pump light, and the Raman laser outputs enhanced Raman laser under the synergistic effect of the arc-shaped inner wall and the reflecting film. Through the multi-dimensional coupling enhancement effect of the cavity structure, the collection efficiency of Raman signals is remarkably improved.

This invention relates to the field of laser technology, and particularly to a Raman laser that outputs 9.2μm far-infrared laser light. It includes a laser pump beam splitting module, a first-order Raman laser generation module, a difference-frequency seed light preparation module, a laser beam combining and tuning module, a second-order Raman amplification module, and a laser collimation and separation module arranged sequentially along the optical path. The laser pump beam splitting module is used to achieve beam splitting and control of the 1064nm laser; the first-order Raman laser generation module is used to generate a 1.9μm first-order Raman laser from hydrogen; the difference-frequency seed light preparation module is used for difference-frequency preparation of the 9.2μm Raman seed light; the laser beam combining and tuning module is used for spatiotemporal overlap and beam combining of the pump light and the seed light; the second-order Raman amplification module is used for Raman amplification of the 9.2μm laser; and the laser collimation and separation module is used for collimation and separation of the target laser output. This invention utilizes a difference-frequency method to generate wavelength-matched far-infrared Raman seed light, and performs Raman amplification to ultimately obtain a 9.2μm far-infrared Raman laser with high pulse energy and high peak power.

This invention belongs to the field of laser technology. It proposes a 10-12 μm tunable diamond Raman laser and a threshold reduction method. A pulsed laser emission system emits a 2.1 μm pulsed laser, which is split into a reflection path and a transmission path by a first polarizer. The reflection path sequentially includes a second half-wave plate, a second polarizer, a first reflecting mirror, and a ring resonator, which outputs a 4.29-4.62 μm laser. The transmission path sequentially includes a third reflecting mirror and a parallel plane cavity, which outputs a 10-12 μm laser. Both types of lasers are injected into the diamond ring cavity via a second and a fourth reflecting mirror, respectively, generating a 10-12 μm tunable diamond Raman laser. This invention utilizes the first-order Raman effect of diamond crystal to obtain long-wave infrared laser in this band, solving the problems of high threshold and low conversion efficiency in existing diamond lasers outputting this laser.

The invention belongs to the technical field of lasers, and provides a 486nm laser based on Raman laser frequency tripling and application, the 486nm laser is used for outputting 486.1 nm target blue light, and the 486nm laser comprises a fundamental frequency light source, a frequency tripling module and a dichroscope; the base frequency light source outputs base frequency light of 1458.3 nm, frequency doubling is carried out on the base frequency light of 1458.3 nm with a part of power in the frequency doubling crystal to generate frequency doubling light of 729.15 nm, and sum frequency is carried out on the base frequency light of 1458.3 nm with the other part of power and the frequency doubling light of 729.15 nm in the sum frequency crystal to generate target blue light of 486.1 nm; and 486.1 nm target blue light is separated and output by using a dichroscope. The blue light source with high power, high light beam quality, high stability and narrow linewidth can be realized, and a high-performance light source is provided for underwater application scenes such as underwater detection, communication, photoelectric countermeasure and diving exploration.

The application discloses an ultra-high dynamic range continuous phase compensation system and method for atomic interference, and belongs to the technical field of atomic interference precision measurement. The system comprises a vibration sensing module, a digital processing module, a phase-locked loop control module and a laser modulation module; a Raman mirror vibration signal is collected in real time through an accelerometer, is input into an FPGA after differential amplification and ADC conversion, is sequentially subjected to high-pass filtering, low-pass filtering and weighted integral operation based on an atomic interference time domain sensitivity function, and a phase compensation amount caused by vibration is calculated in real time; the phase compensation amount is converted into an analog compensation signal through a DAC and is injected into a phase-locked loop control link, a phase error signal output by a frequency discriminator is combined, a VCO is controlled, an AOM or an EOM is driven to implement continuous phase modulation on Raman laser in the whole process, and thus real-time, high-precision and high-bandwidth compensation of phase noise caused by mirror vibration is realized, and the system has the advantages of large dynamic range and strong environmental adaptability.

This invention belongs to the field of laser technology and proposes a seed-injection-based diamond Raman laser and its operating method. A single-frequency continuous-wave seed laser source is used to inject seeds into a diamond ring cavity, reducing the pump threshold of the diamond Raman laser. By changing the cavity mirror parameters of the diamond ring cavity and tuning the output wavelength of the single-frequency continuous-wave seed laser source, Raman laser output in a preset band is achieved. Based on the advantage of diamond crystal having the largest Raman frequency shift coefficient, and by combining seed injection technology with a diamond ring cavity, the pump threshold of a 2μm band laser pumping a diamond all-solid-state Raman laser is reduced. This enables the laser to achieve pulsed laser output of 2.9μm band first-order Stokes light and 4.7μm band second-order Stokes light at lower pump energies, improving the energy utilization efficiency of the laser.

The invention provides a Raman fiber laser and an optical amplifier, and belongs to the technical field of optical communication. The Raman fiber laser comprises a plurality of pump light assemblies, a combiner, a multi-wavelength reflector, a Raman gain fiber and a multi-wavelength output device, each pump light assembly is connected with the combiner, the combiner is connected with the multi-wavelength reflector, and the Raman gain optical fiber is located between the multi-wavelength reflector and the multi-wavelength output device; the plurality of pump light assemblies are used for outputting optical signals with multiple wavelengths to the combiner; the combiner is used for combining the optical signals with multiple wavelengths into a combined signal and outputting the combined signal; the multi-wavelength reflector is used for inputting the combined wave signal to the Raman gain optical fiber and reflecting the middle Raman laser and the target Raman laser corresponding to each wavelength in multiple wavelengths; and the multi-wavelength output device is used for reflecting the middle Raman laser corresponding to each wavelength and outputting the target Raman laser corresponding to each wavelength. By adopting the Raman fiber laser, Raman laser with various wavelengths can be output.

The application belongs to the field of Raman laser, and particularly relates to a Herriot type multi-pass cell anti-Stokes Raman high peak power blue laser, which comprises a pumping laser, a plano-convex lens A, a Raman cell, a plano-convex lens B and a 45-degree angle dichroic mirror, the pumping laser is a Nd:YAG pulse solid laser, a 532nm pulse laser is used to pump a mixed gas of H2 and inert gas in the Raman cell, three times of focusing are carried out in the Raman cell, and finally a first order anti-Stokes Raman blue laser is output, the conversion efficiency of the first order anti-Stokes Raman blue laser can reach 10-15%, the pulse energy can be more than 50mJ, and the peak power reaches 10MW level. The application has the advantages of simple Raman laser structure, convenient and fast installation and adjustment, and provides a blue laser for generating high peak power blue laser with high cost performance, especially for the blue laser which is difficult to generate by a conventional method.

Technologies for a photon pair source integrated on a photonic die are disclosed. In an illustrative embodiment, a photonic die includes an integrated semiconductor laser. The integrated semiconductor laser pumps a Raman laser on the same die. The Raman laser has much lower noise near the laser peak compared to the semiconductor laser, due to a smaller gain bandwidth and less amplified stimulated emission. Due to the low noise, the Raman laser can be used to pump a spontaneous four-wave mixing (SFWM) source directly, without off-chip filtering required. The SFWM source can generate entangled photons with a high signal-to-noise ratio, with applications for quantum cryptography, quantum computing, and other quantum information processing tasks.

The present disclosure provides systems and methods for pumping of polarization-maintaining (PM) Raman fiber lasers (RFLs) and Raman fiber amplifiers (RFAs). Briefly described, one embodiment uses a low-noise source as a pump for a PM RFL. Another embodiment uses a low-noise PM semi-random RFL as a pump source for a PM RFA

The application discloses a gravity and gravity gradient integrated measuring device and method based on atomic interference, and the measuring device comprises a Raman laser emitter and a structural framework. Raman laser emitted by the Raman laser emitter passes through an upper atomic interferometer and a lower atomic interferometer in sequence and then is vertically incident on a Raman laser reflector. The bottom of the Raman laser reflector is fixedly connected with the top of a seismometer through an adapter, and the structural framework is installed on a rotating platform. The measuring method comprises the following steps: firstly, the orientation angles corresponding to the maximum value and the minimum value of the gravity gradient are determined; at a new measuring point, the orientation angle of the measuring device is adjusted to the orientation angles corresponding to the maximum value and the minimum value of the gravity gradient; the original gravity measurement value of the upper atomic interferometer, the original gravity measurement value of the lower atomic interferometer and the original measurement value of the gravity gradient are obtained and corrected. The measuring repeatability problem caused by the Coriolis error in the measuring process is effectively solved.

The invention belongs to the technical field of lasers. According to the 10-12 [mu] m tunable diamond Raman laser and the threshold reduction method, a pulse laser emission system emits 2.1 [mu] m pulse laser, the 2.1 [mu] m pulse laser is divided into a reflection path and a transmission path through a first polarizer, the reflection path is sequentially provided with a second half-wave plate, a second polarizer, a first reflector and an annular resonant cavity, and the annular resonant cavity outputs 4.29-4.62 [mu] m laser; a third reflecting mirror and a parallel plane cavity are sequentially arranged on a transmission path, the parallel plane cavity outputs 10-12 [mu] m laser, the two kinds of laser are injected into the diamond annular cavity through a second reflecting mirror and a fourth reflecting mirror respectively, and 10-12 [mu] m tunable diamond Raman laser is generated in the diamond annular cavity. The long-wave infrared laser of the wave band is obtained through the first-order Raman effect of the diamond crystal, and the problems that when existing diamond outputs the laser, the threshold value is high, and the conversion efficiency is low are solved.

The invention discloses a gas detection device, comprising: a gas cell, the gas cell comprising a main cavity extending along a first direction and a side arm communicated with the middle of the main cavity and extending along a second direction; a first laser of the TDLAS module couples a TDLAS laser beam into a main cavity through a transmitting optical fiber, the TDLAS laser beam is propagated in the first direction to form an absorption light path, and the laser beam absorbed by gas is collected to a first detector through a receiving optical fiber; a second laser of the Raman module introduces and focuses a Raman laser beam to a detection point in the main cavity through a side arm in a second direction by exciting an optical fiber, and the detection point is located on a TDLAS laser beam light path; raman scattering light is collected to a second detector by a collecting optical fiber; the temperature and pressure acquisition module is used for acquiring the temperature and the pressure of gas in the gas pool respectively; according to the device, concurrent detection and data complementation of TDLAS detection and Raman detection can be realized, and the gas detection precision and reliability are improved.

The invention discloses a power station boiler coal quality real-time analysis method and system based on a Raman laser spectrum, and relates to the technical field of intelligent sensors, and the method comprises the steps: carrying out the image shooting of a to-be-analyzed target object through Raman laser, and carrying out the preprocessing to obtain a stable signal sequence; the preprocessing comprises denoising, smoothing and interpolation; performing spectral feature extraction and classification on the stable signal sequence to obtain a spectral feature classification result; extracting periodic spectral features according to a spectral feature classification result, then carrying out weighted adjustment and principal component extraction, and calculating an intensity value; performing optimization processing according to the intensity value, and determining the quality grade of the corresponding image data; the optimization processing comprises normalization, smoothing processing and abnormal value elimination. According to the method, through data alignment and spectral feature extraction, residual analysis and multi-cycle data integration are combined, so that the reliability of feature values is ensured, the precision and stability of material quality monitoring in a complex environment are improved, and a reliable quality evaluation basis is provided for industrial production.

The application provides a method for nondestructive detection of the contents of EPA and DHA in scallop adductor muscle based on Raman spectrum, which comprises the following steps: firstly, a proper amount of gill filament tissue is taken from a living scallop by a nondestructive method, and then a frozen section is prepared; secondly, the section is subjected to Raman laser scanning to obtain original data; and finally, after pretreatment such as normalization, noise reduction and baseline correction, a characteristic wavelength is selected, and a model for predicting the content of unsaturated fatty acid in the adductor muscle by using the gill filament Raman data across tissues is established in combination with the lipid group data of the adductor muscle. Compared with the existing method for detecting the content of unsaturated fatty acid in scallops, the determination method of the application can realize the rapid, accurate and simple detection of the content of unsaturated fatty acid in the main edible part, i.e., the striated muscle of scallops, under the condition of ensuring the survival of scallops, and greatly reduces the detection cost, thereby providing an efficient and simple technical means for the breeding of shellfish quality traits, and being beneficial to the popularization and promotion in the comprehensive evaluation and genetic improvement of aquatic germplasm.

Disclosed is an out-field detection device, comprising an out-field stainless steel substrate, a passivation solution container, a cover glass, an electrochemical workstation, a Raman spectrometer, a Raman laser emission source, and a peristaltic pump. The passivation solution container is configured to contain a passivation solution; the cover glass is configured to seal the passivation solution container; the peristaltic pump is in fluid communication with the passivation solution container and configured to control flow of the passivation solution; the electrochemical workstation is configured to apply a dynamic potential to the out-field stainless steel substrate and measure a polarization curve, the electrochemical workstation is provided with a working electrode interface configured to establish electrical connection; the Raman laser emission source is configured to emit laser light toward the passivation solution; the Raman spectrometer is configured to obtain a Raman spectrum of the passivation solution.