107results about How to "High beam quality" patented technology

The invention discloses a method for dynamically correcting off-axis aberration of a liquid mirror telescope, which comprises the following steps of: S1, adjusting a secondary mirror body to perform dynamic full-angle circular motion around the center of a primary mirror by using a secondary mirror rotating system, so that the secondary mirror body acquires an incident beam from any direction; s2, acquiring attitude information of the secondary mirror body, and adjusting the secondary mirror body according to the dynamically changeable off-axis angle based on a preset secondary mirror pose adjustment sub-method to compensate for low-order aberration; s3, the light beams of the distorted wavefront compensated by the secondary mirror are adjusted to be emitted in a determined direction in parallel and enter an adjustable beam expanding and shrinking mirror through two groups of plane reflection systems; s4, the light beam with the light spot size adjusted through the adjustable beam expanding and shrinking mirror is reflected to the magnetic liquid deformable mirror through the reflecting mirror; and S5, the magnetic liquid deformable mirror receives the reflected light beam and performs residual aberration correction. According to the method, the observation view field of the liquid mirror telescope can be effectively improved, the imaging quality is improved, and an aberration correction system is endowed with excellent flexibility and wide adaptability.

The present invention relates to the technical field of optical fiber devices, and proposes a hollow-core fiber power combiner, including an optical fiber bundle and a hollow-core optical fiber, wherein the optical fiber bundle is formed by taper-forming n solid-core optical fibers; the input end of the optical fiber bundle is the large end of the optical fiber bundle, and the output end of the optical fiber bundle is the small end of the optical fiber bundle, wherein one of the n solid-core optical fibers in the optical fiber bundle is located at the center as the central optical fiber, and the remaining n-1 optical fibers are distributed around the center optical fiber; the hollow-core optical fiber is a nested anti-resonant hollow-core optical fiber, which includes an outer cladding, a nested ring and a hollow-core region from the inside to the outside, and n-1 nested rings are distributed around the periphery of the hollow-core region; the laser of the input optical fiber bundle is input into the hollow-core optical fiber through the small end of the optical fiber bundle, and the long-distance transmission of the laser is realized by using the hollow-core optical fiber. The present invention has a simple and compact structure, high coupling efficiency, can better maintain the purity of the beam mode, and has great application value and potential advantages for high-power long-distance transmission of optical fiber lasers.

The invention discloses a cavity enhanced Fabry-Perot interference resonant cavity, and belongs to the technical field of sensing detection. The transduction film is used as a transduction medium, vibration is generated through induction, signals are converted into vibration of the film, optical signals are modulated, and information to be measured can be obtained. According to the invention, the cavity enhancement structure is introduced, the optical fiber collimator and the transduction film jointly form an interference resonant cavity, and the phase sensitization of the optical microcavity is realized by improving the reflectivity of the cavity and prolonging the time of capturing light. Through stable interference of the resonant cavity, strong optical constraint is generated, and interaction between a light beam and a transmission signal is enhanced. In addition to the characteristics of high sensitivity, small loss, small size and high integration, the device has high expandability in the design aspects of bandwidth and sensitivity, and good sensing performance and design flexibility of the device provide a new opportunity for propelling the military and civil fields such as monitoring technology and biomedicine.

The invention relates to the technical field of semiconductor devices, in particular to a semiconductor laser device, which comprises a substrate; the ridge waveguide array comprises a fundamental mode waveguide array and a coupling waveguide array, the fundamental mode waveguide array comprises N fundamental mode waveguides, the coupling waveguide array comprises a plurality of coupling waveguides, and at least one coupling waveguide is provided with an optical loss structure; an electrical isolation structure; the coupling waveguide array is located on one side of the fundamental mode waveguide array, and the number of the coupling waveguides is N-1; or, the two coupling waveguide arrays are located on the two opposite sides of the fundamental mode waveguide array respectively, and the number of the coupling waveguides in each coupling waveguide array is N-1; or, the two coupling waveguide arrays are located on the two opposite sides of the fundamental mode waveguide array respectively, and the total number of the coupling waveguides of the two coupling waveguide arrays is N-1. The semiconductor laser device is at least beneficial to realizing high-power output of the fundamental mode of the semiconductor laser device.

The invention belongs to the technical field of blue light semiconductor laser, and discloses a common external cavity line width compression system based on a transmission grating, which comprises N blue light modules, a common external cavity module, an output coupling module and an optical fiber focusing output module, the common external cavity module comprises a first cubic optical splitter, a transmission grating and a first reflector; a blue light beam output by any blue light module is divided into reflected light and transmission light after passing through the first cubic optical splitter; the reflected light passes through the transmission grating, then returns along an original light path through the first reflector and is split again at the first cubic optical splitter, one part of light beams return to any blue light module along the original light path, and the other part of light beams are transmitted to the other blue light modules respectively; the laser beam and a light beam returned along an original light path in any blue light module jointly form littman external cavity feedback of any blue light module so as to realize line width compression; according to the invention, high-power and narrow-linewidth laser output can be realized, the expandability of the system is improved, and the structural complexity of the system is reduced.

The utility model provides a nanosecond blue light laser. Comprising a first reflecting lens, a quarter-wave plate, a first Q-switching module, a first side pump module, an optical rotation sheet, a second side pump module, a second Q-switching module, a polarizing film, a second reflecting lens, a third reflecting lens, a half-wave plate, a fourth reflecting lens, a beam expanding lens, a first plano-convex lens, a frequency doubling crystal, a color separation lens and a second plano-convex lens which are arranged in sequence. According to the nanosecond blue light laser, a resonant cavity with a novel structure is used, and high-efficiency nanosecond polarized light output with the wavelength of 946 nm is achieved. The LBO frequency doubling crystal is utilized, nanosecond laser with the wavelength of 946 nm is subjected to frequency doubling to form nanosecond blue light with the wavelength of 473 nm, the nanosecond blue light is output, the light beam quality is good, and the power is high.

The utility model discloses a high-power transmission optical communication device, which comprises an optical resonant cavity, a vortex optical signal coding device and an optical signal transmission decoding device which are fixedly connected with a conical single crystal optical fiber, and is characterized in that: by optimizing signal light generation and designing an optical communication multiplexing modulation and transmission system, a double-end pumped rod-shaped conical single crystal optical fiber is utilized, so that the high-power transmission optical communication is realized; a set of solid annular resonant cavity is built, high-beam-quality stable continuous signal beams with the average power of dozens of watts can be output, meanwhile, a set of vortex optical communication system based on Dammann grating multiplexing different orbital angular momentums is built, the characteristics of vortex beam OAM are combined, a digital micro-mirror device is used for pulse time domain modulation, and the output power of the vortex optical communication system is improved. Loading of information amount with high fidelity and high signal-to-noise ratio is effectively achieved, multiplexing of multiple beams of different vortex signal light loaded with modulation signals in the same beam of light signal can be effectively achieved through a pair of designed conjugate gratings, and high-efficiency, high-speed, large-capacity, high-power and stable optical communication is achieved.

A 1907nm single-mode polarization-maintaining all-fiber laser belongs to the field of optics. The present invention solves the problem of low output power of the existing polarization-maintaining single-mode thulium-doped fiber laser. It includes: a fiber oscillator and a fiber amplifier; a high-reflectivity fiber Bragg grating is sequentially connected to the first forward-pumped optical combiner, the first low-doped single-mode thulium-doped gain fiber and the low-reflectivity fiber Bragg grating, and the first pump light source is connected to the first forward-pumped optical combiner pump fiber; the output end of the low-reflectivity fiber Bragg grating is connected to the input end of the first cladding pump light stripper; the first cladding pump light stripper is sequentially connected to the optical isolator, the mode field adapter, the second forward-pumped optical combiner, the second low-doped single-mode thulium-doped gain fiber and the second cladding pump light stripper, and the second pump light source is connected to the second forward-pumped optical combiner pump fiber; the optical isolator pigtail outputs linearly polarized light on the slow axis; all devices are polarization-maintaining devices. The present invention is used for fiber lasers.

The invention relates to the technical field of optical fiber lasers, and provides an ultra-wideband tunable optical fiber communication light source based on gas stimulated Raman scattering. Comprising a 1 [mu] m wave band seed source, an electro-optical modulator, a signal generator, an optical fiber amplifier, a solid core-hollow core compact coupling device, an optical fiber end cap, a hollow core optical fiber, a miniature gas cavity, a lens and a dichroic mirror, and the tuning range of the methane gas 1 [mu] m wave band tunable pumping source at least covers 1024-1126 nm. The laser can be converted into communication wave band laser covering the whole S + C + L + U wave band, and benefited from the Raman characteristic of methane molecules, the output laser under single wavelength pumping has a corresponding narrow-linewidth single spectral line, no accompanying ASE noise amplification and the like, and secondary filtering is not needed for selection; and meanwhile, the use of the hollow-core optical fiber ensures that the output laser is only a single mode, and high beam quality can be ensured without other operations.

The invention belongs to the technical field of lasers, and relates to a dual-wavelength slab laser which comprises a laser resonant cavity unit and a slab crystal pump unit. The laser resonant cavity unit is provided with a first light path, and a first total reflection mirror, a slab crystal, a first electro-optical Q switch and a first output mirror are sequentially arranged along the first light path; a second total reflection mirror, a slab crystal, a second electro-optical Q switch and a second output mirror are sequentially arranged along the second light path; the slab crystal pumping device unit is a side pumping or a large pumping, and comprises a semiconductor laser array and an optical waveguide; the shape of the lath crystal is a trapezoid, and the lath crystal is an Nd: YAG crystal; the wavelengths of lasers output by the dual-wavelength slab laser are 1064 nm and 1319 nm respectively. The dual-wavelength slab laser has the advantages of high pumping power and high beam quality, and maximum power output is achieved.

The invention discloses a mid-infrared and far-infrared heterogeneous integrated optical fiber combiner and a preparation method thereof, and belongs to the technical field of mid-infrared optical fiber devices.The combiner comprises six sulfur-based chalcogenide optical fibers with the working wave band being 3-5 microns and four Te-based chalcogenide optical fibers with the working wave band being 7-11 microns, the six sulfur-based chalcogenide optical fibers and the four Te-based chalcogenide optical fibers are mixed in a heterogeneous mode, and ten input optical fibers are closely arranged according to a regular triangle; beam combination transmission is formed by optimizing a low-temperature fused biconical taper process, the optical fiber is precisely welded with an output optical fiber with a slightly large core diameter, and finally the optical fiber is packaged. The beam combiner realizes broadband efficient laser transmission, has the characteristics of excellent beam quality, high synthesis efficiency, large total output power, compact structure and strong stability, and can be widely applied to the fields of optical fiber sensing, laser processing, national defense and the like.

The semiconductor laser comprises an N-surface electrode, an N-type substrate, an N-type buffer layer, an N-type limiting layer, an N-type waveguide layer, an active layer, a P-type waveguide layer, a P-type limiting layer, an ohmic contact layer 109 and a P-surface electrode which are arranged in sequence, injection regions and non-injection regions are arranged in the P-type limiting layer, the non-injection regions are arranged at the two ends of the injection regions in the direction parallel to the plane where the P-type limiting layer is located, the non-injection regions are formed by the N-type barrier layer, and the injection regions are formed by the P-type limiting layer. Based on the above scheme, current lateral diffusion can be prevented or at least weakened, accumulation of current carriers can be inhibited, the injection efficiency of the current can be improved, and high-power, low-current threshold and conversion rate output can be realized; therefore, the near-field / far-field divergence angle of the semiconductor laser can be reduced to a certain extent, and the light beam quality and brightness of the semiconductor laser are improved.

A narrow-pulse-width multi-wavelength laser based on LED pumping comprises a reflecting mirror, a first LED pumping module, an optical rotation crystal, a second LED pumping module, an acousto-optic Q-switched crystal and an output mirror which are sequentially connected in series. The LED pumping module comprises a laser rod located in the center, a glass sleeve is arranged on the periphery of the laser rod in the length direction, a supporting frame is arranged on the periphery of the glass sleeve, a plurality of sets of water-cooling copper blocks are evenly arranged on the supporting frame, and an LED stacking array is arranged on the side, close to the glass sleeve, of each set of water-cooling copper blocks. Each LED stacking array comprises an LED light bar and a PCB (Printed Circuit Board) for fixing the LED light bar, and the PCB is connected with the water-cooling copper block; cooling water circulation modules are arranged at the two ends of the laser rod in the length direction respectively, and water through holes are formed in the cooling water circulation modules and the water cooling copper blocks respectively. A laser resonant cavity system of the laser takes an LED as a pumping source, combines an acousto-optic Q-switching technology, and simultaneously realizes compression of laser pulse width and multi-wavelength output.

The invention relates to the technical field of optical fiber devices, and provides a hollow-core optical fiber power beam combiner, which comprises an optical fiber bundle and a hollow-core optical fiber, and is characterized in that the optical fiber bundle is formed by tapering and bunching n solid-core optical fibers; the input end of the optical fiber bundle is an optical fiber bundle large-head end, the output end of the optical fiber bundle is an optical fiber bundle small-head end, one of n solid optical fibers in the optical fiber bundle is located in the center and serves as a central optical fiber, and the rest n-1 optical fibers are distributed around the central optical fiber in a center surrounding mode; the hollow-core optical fiber is a nested anti-resonance hollow-core optical fiber and sequentially comprises an outer cladding layer, nested rings and a hollow-core area from inside to outside, and n-1 nested rings are distributed around the periphery of the hollow-core area; laser of the input optical fiber bundle is input into the hollow-core optical fiber through the small end of the optical fiber bundle, and long-distance transmission of the laser is achieved through the hollow-core optical fiber. The device is simple and compact in structure and high in coupling efficiency, can well maintain the mode purity of the light beam, and has great application value and potential advantages for high-power long-distance transmission of the fiber laser.

The application discloses a kind of parallel coupling self-imaging external cavity coherent array semiconductor laser, comprising: semiconductor laser chip array, light transmission dielectric layer and external cavity reflection layer;Semiconductor laser chip array includes multiple light emitting units, light transmission dielectric layer and external cavity reflection layer form laser self-imaging external cavity;The non-light emitting area of semiconductor laser chip array light emitting surface is coated with high reflection film, and the feedback light that cannot be injected into the light emitting unit due to incomplete self-imaging at the edge of semiconductor laser chip array can oscillate in self-imaging external cavity multiple times to reform the self-imaging that can be completely injected into the light emitting unit.The application improves the injection of laser outside the light emitting area, can efficiently parallel coupling all light emitting units including edge in chip array, eliminate the edge effect of chip array generated by self-imaging external cavity feedback, enhance the feedback efficiency of self-imaging external cavity, obtain the coherent array laser output of high parallel coupling efficiency, high efficiency optical mutual injection.

The invention discloses a high-efficiency optical parametric oscillator, and belongs to the technical field of lasers, the high-efficiency optical parametric oscillator comprises a pumping source output assembly, a coupling system, a first resonant cavity mirror and a nonlinear crystal which are sequentially arranged along the direction of an optical path, a dispersion prism is arranged at a light outlet of the nonlinear crystal, and the dispersion prism can divide light into signal light and idler frequency light; the dispersion prism and the light source are transmitted along a first light path and a second light path respectively, a second resonant cavity mirror is arranged on the first light path, an optical parameter adjusting assembly is arranged between the dispersion prism and the second resonant cavity mirror, and a third resonant cavity mirror is arranged on the second light path. According to the high-efficiency optical parametric oscillator provided by the invention, the light-light conversion efficiency and high light beam quality of parametric light can be simultaneously obtained under different power pumps under the conditions of not changing a cavity type structure and not needing to be reassembled and adjusted under the different power pumps.

The invention relates to the technical field of optical fiber lasers, and proposes an ultra-wideband tunable optical fiber communication light source based on gas stimulated Raman scattering, comprising a 1μm band seed source, an electro-optic modulator, a signal generator, an optical fiber amplifier, a solid-hollow compact coupling device, an optical fiber end cap, a hollow-core optical fiber, a micro gas cavity, a lens, a dichroic mirror, and a methane gas 1μm band tunable pump source. The tuning range covers at least 1024nm-1126nm. Based on the stimulated Raman scattering effect of methane gas, it can be converted into a communication band laser covering the entire S+C+L+U band. Thanks to the Raman characteristics of methane molecules, the output laser has a corresponding narrow line width single spectral line under single wavelength pumping, without accompanying ASE noise amplification, etc., and does not need to be selected through secondary filtering. At the same time, the use of the hollow-core optical fiber ensures that the output laser is only single-mode, and high beam quality can be guaranteed without other operations.

The invention provides a multi-wavelength phase modulation scanning measurement system and method, and the system is characterized in that a multi-wavelength light beam generated by a radiation source is subjected to the beam splitting and phase modulation of a first optical system, and then is irradiated to a target structure. Because the response of the light beams with different wavelengths to the target structure is different, the measurement effect can be optimized by adjusting the phase difference. The scattered light beams interfere with each other at the imaging detector to form an interference pattern containing target structure information. The processor analyzes and processes the patterns and extracts related information of the target structure. According to the invention, by introducing a light source with multiple wavelengths and an advanced phase modulation technology, high-precision three-dimensional shape measurement of a target structure is realized.

The invention discloses a saturable absorber based on Bi2Te3 / Sb2Te3 and an all-solid-state passive Q-switched mode-locked pulse laser based on Bi2Te3 / Sb2Te3. The structure of the saturable absorber based on Bi2Te3 / Sb2Te3 comprises a substrate and a saturable absorption layer arranged on the surface of the substrate, wherein the saturable absorption layer comprises a polymer matrix and a Bi2Te3 / Sb2Te3 transverse heterojunction material. According to the invention, the thermal stability and the mechanical strength of Bi2Te3 / Sb2Te3 can be effectively improved. In an all-solid-state laser, a saturable absorber based on a Bi2Te3 / Sb2Te3 transverse heterojunction material is used as a Q-switched mode-locked starting element, stable passive Q-switched mode-locked laser operation with the wavelength of 1064 nm is achieved, and obtained pulse laser output has high peak power, narrow pulse width, excellent light beam quality and high stability.

The invention relates to a radiation meter dense feed source array directional diagram optimization method based on a generative adversarial network. The method comprises the following steps: constructing a training data set, a condition vector containing a target directional diagram performance index and a corresponding optimal amplitude-phase weight vector; designing a conditional generative adversarial network model; constructing a physical constraint loss function by embedding a differentiable electromagnetic calculation module; loading the constructed training data set, and training a complete generative adversarial network model based on a loss function embedded with a differentiable electromagnetic calculation module; and when the system antenna pattern obtained according to the amplitude-phase adjustment parameters output by the generative adversarial network model meets the antenna pattern evaluation index, completing dense feed source array antenna pattern optimization. According to the method, the target weight is dynamically adjusted and optimized on orbit, so that a single model can adapt to beam forming requirements in different observation scenes, and flexible switching of multiple task modes such as high-resolution detection and wide-range general survey is realized.

The invention discloses a laser output optical device, a laser, equipment and a method. The laser output optical device comprises an output optical fiber, an optical waveguide and an optical output head which are connected in sequence, the output optical fiber is used for outputting point ring light beams, a cladding layer, wrapping the second fiber core, of at least partial area, close to the output optical fiber, of the optical waveguide comprises a second conical structure, and the cross section of the second conical structure is annular. The outer diameter of the second conical structure is gradually increased in the light beam transmission direction, and the second conical structure is used for adjusting the light path of the point ring light beam so as to adjust the divergence angle of inner and outer ring light beams. And the optical output head is used for outputting the light beam adjusted by the optical waveguide. The pre-modulated light from the output optical fiber is accurately regulated and controlled, the divergence angle of the output light is adjusted, the light beam quality is improved, and meanwhile the device has the advantages of being simple in structure, low in cost and high in stability.

The invention discloses a slice laser based on a topological structure dodging layer. The slice laser comprises a pumping system, a pumping light injection module and a composite dodging waveguide structure, pumping light generated by the pumping system enters the composite dodging waveguide structure through the pumping light injection module; the front end face of the composite dodging waveguide structure is plated with a pumping light wavelength high-reflective film and a laser wavelength antireflection film, and the rear end face of the composite dodging waveguide structure is plated with a pumping source wavelength and laser wavelength high-reflective film; the composite dodging waveguide structure comprises a slice gain medium, a topological structure dodging layer and a middle refractive index layer which are sequentially arranged from the front end face to the rear end face. The topological structure dodging layer is composed of a low-refractive-index material layer and a high-refractive-index material topological graph arranged on the low-refractive-index material layer; and the pump light injection module is fixed above the high refractive index material of the middle refractive index layer or the topological structure dodging layer. Pumping uniformity is improved fundamentally, high-order mode suppression and efficient fundamental mode extraction are facilitated, and output power and light beam quality are improved at the same time.

The invention belongs to the technical field of laser amplification, and relates to a double-end-face LD pumping crystal rod amplification module which comprises a light beam polarizing and light splitting part and a light beam amplification part which are sequentially arranged in the light path direction. The light beam polarizing and splitting part comprises a seed source laser, a 1 / 4 wave plate, an optical isolator, a second PBS (Phosphate Buffer Solution) prism, a first 45-degree reflecting mirror and a first shaping lens which are sequentially arranged along the light path direction; the light beam amplification part comprises a second 45-degree reflecting mirror, a laser crystal, a third 45-degree reflecting mirror, a second shaping lens and a total reflection mirror which are sequentially arranged along the light path direction; a first LD pumping module, a second LD pumping module, a first collimating focus lens group and a second collimating focus lens group are symmetrically distributed on the two sides of the end face of the laser crystal. The double-end-face LD pumping crystal rod amplification module can meet the requirements of high light beam quality and high laser power at the same time.

The present invention provides a Q-switch structure including a solid-state laser medium and a magneto-optical material. The solid-state laser medium and the magneto-optical material are joined and integrated, a first anti-reflecting film for adhesive is formed on a surface of the solid-state laser medium, and a second anti-reflecting film for adhesive is formed on a surface of the magneto-optical material. The first anti-reflecting film for adhesive on the solid-state laser medium and the second anti-reflecting film for adhesive on the magneto-optical material are bonded via a translucent material having a transparency at a laser oscillation wavelength of laser oscillated from the solid-state laser medium. This provides the Q-switch that contributes to the miniaturization of a laser apparatus and has high beam quality.

The application relates to a kind of laser beam shaping systems and methods based on optical waveguide, belong to beam shaping technology.It includes semiconductor laser from left to right sequentially arranged, fast axis collimating lens, slow axis collimating lens, beam expander system, focusing lens and optical waveguide;Fast axis collimating lens is plano-convex cylindrical lens, for collimating the fast axis direction of light beam;Slow axis collimating lens is plano-convex cylindrical lens, for collimating the slow axis direction of light beam;Beam expander system includes preceding plano-concave cylindrical lens and following plano-convex cylindrical lens, for expanding the light beam width of slow axis direction to be consistent with the light beam width of fast axis direction;Focusing lens is plano-convex lens, for focusing light beam to optical waveguide input end;The input end section of optical waveguide is rectangle, and the output end section is circular, for shaping rectangular light spot into circular light spot.In the application, light beam is transmitted in optical waveguide efficiently, and gradually shaped into circular light beam through transition structure.

The present invention provides a rare earth-doped optical fiber for suppressing mode instability effects and a preparation method thereof, and relates to the technical field of special optical fiber preparation. The preparation method first deposits a channel region with a low refractive index in a quartz tube, and then sequentially prepares a core passive region and a core active region with different doping components to achieve different thermo-optic coefficients in the local region of the core. The present invention reduces the thermo-optic coefficient of the optical fiber and weakens the nonlinear inter-mode coupling effect by introducing a negative thermo-optic coefficient material, thereby effectively suppressing MI; at the same time, the method of rare earth ion center doping is adopted to reduce the high-order mode gain in the case of a large core, and then suppress the generation of high-order modes through a mode competition mechanism, thereby increasing the proportion of the fundamental mode; the low numerical aperture and channel structure design enable the optical fiber to have a higher high-order mode loss, suppress the fundamental mode-high-order mode coupling effect, further increase the MI threshold, and improve the beam quality.

The application provides an internal-pumping thin slice laser emitting coherent array laser, comprising a heat sink, a pump light source, a coupling module, an internal resonant cavity and a cut-angle external cavity, the internal resonant cavity, the cut-angle external cavity and a double-wavelength reflecting layer arranged outside a front end surface of the cut-angle external cavity form a resonant cavity, the internal resonant cavity comprises, from inside the cut-angle external cavity, a semi-reflective semi-transmissive layer, a micro-structure thin slice and a double-wavelength high-reflective layer arranged in sequence from the inside of the front end surface to a rear end surface, and the double-wavelength high-reflective layer and the rear end surface of the cut-angle external cavity are attached to the heat sink. The internal-pumping thin slice laser emitting coherent array laser has the advantages of high pumping efficiency, output power, beam quality and stability, and compact structure. The application further provides a preparation method of the internal-pumping thin slice laser emitting coherent array laser.

This invention discloses a device for real-time analysis of multidimensional information of spatiotemporally mode-locked pulses using an all-fiber structure, belonging to the field of ultrafast optics technology. It includes an all-fiber spatiotemporally mode-locked laser platform, a raw pulse beam profile measurement module, an optical circulator, a sub-pulse beam profile measurement module, and a dispersive Fourier transform and real-time spectral information detection module. Based on the generalized multimode nonlinear Schrödinger equation, this invention constructs a theoretical model of the spatiotemporally mode-locked laser, explores the multidimensional parameter coupling mechanism during spatiotemporal mode-locking, clarifies the mapping relationship between modes and frequencies, and provides a theoretical basis and method for high-precision mode differentiation and multidimensional real-time information extraction. This invention aims to rationally design the parameters of each fiber grating according to the spectral width and temporal interval of the spatiotemporally mode-locked pulse, reflecting more sub-pulses while ensuring that the pulse temporal domains do not overlap, achieving high-precision spatial mode resolution, and maximizing pulse broadening to obtain high-resolution real-time spectral information.

This invention discloses an all-solid-state white laser, belonging to the field of laser technology. The laser includes a pump source for generating pump light and a composite laser gain medium for receiving the pump light. The composite laser gain medium is composed of several laser crystals with a stepped distribution of pump light absorption coefficients and several nonlinear optical crystals arranged in a cross-bonded configuration. A first laser resonator, a second laser resonator, and a third laser resonator are formed by coating the laser crystals and nonlinear optical crystals respectively, enabling them to generate lasers of different wavelengths in the same direction under the action of focused pump light. The first laser output from the first laser resonator, the second laser output from the second laser resonator, and the third laser output from the third laser resonator are mixed in the same direction to generate white light, which is then output. This invention effectively improves the thermal effect inside the gain medium through relatively independent resonators, which is beneficial for obtaining high-quality, high-power white light output.

A single longitudinal mode laser based on LED pumping comprises a plane mirror, two sets of LED pumping modules and an output mirror which are sequentially connected in series, an optical rotation crystal is connected between the two sets of LED pumping modules in series, and an LED array serves as a pumping source to provide excitation energy in the laser and excite electrons in a gain medium to transition from a low energy state to a high energy state, so that stimulated radiation is generated. When light emitted by the LED irradiates the gain medium, the medium absorbs light energy and enters an excited state, and then laser output is achieved in the resonant cavity through stimulated emission. The ring cavity single longitudinal mode technology combines the advantages of high flexibility, high stability and easy regulation and control, the performance and the application range of the single longitudinal mode laser are greatly enhanced, and the ring cavity single longitudinal mode technology is particularly prominent in the fields of precision optical application and nonlinear optics. The method overcomes the limitation of a traditional single longitudinal mode laser in the aspects of single longitudinal mode stability, mode competition and output stability, and shows powerful technical potential.