372results about "Optical resonator shape and construction" patented technology

The invention discloses a dual-wavelength microsphere laser based on tri-doped rare earth ions and a preparation method thereof, the dual-wavelength microsphere laser based on tri-doped rare earth ions comprises a silica fiber, the middle part of the silica fiber is provided with a conical region; the pump light source is arranged at one end of the silica fiber; the erbium, holmium and ytterbium tri-doped tellurate glass microspheres are arranged in the conical region; pump light emitted by the pump light source is guided to the conical region through the single-mode optical fiber and is optically coupled with the erbium-holmium-ytterbium tri-doped tellurate glass microsphere; in the erbium-holmium-ytterbium triple-doped tellurate glass microspheres, infrared-transmitting tellurate glass is used as a matrix, and the doping amount of an erbium element is 0.11%, the doping amount of a holmium element is 0.22%, and the doping amount of an ytterbium element is 0.80% in percentage by mass. According to the dual-wavelength microsphere laser based on the three-doped rare earth ions, efficient and stable dual-wavelength laser output is achieved.

The invention discloses a non-linear frequency conversion regenerative amplification device and a method thereof, and belongs to the technical field of laser non-linear frequency conversion. The device comprises a signal light injection unit, a regeneration amplification cavity unit and a pump light synchronization unit. The regenerative amplification cavity unit comprises an optical resonant cavity structure module, a polarization control module and a nonlinear action module. A time domain switch is formed through the polarization control module under the driving of the time schedule controller, and the preset number of times of circulation of signal light in the cavity is accurately controlled. And meanwhile, the pump light synchronization unit generates pump pulse string laser which is synchronous with the circulation process and has sub-pulse power increasing in sequence, so that the signal light and one corresponding pump sub-pulse are subjected to optical parametric amplification in the nonlinear crystal in each circulation. The space complexity of multi-stage amplification is converted into time domain controllability, high-efficiency and high-gain nonlinear frequency conversion is realized by using a single-stage compact structure, and the integration level and the stability of the system are remarkably improved.

The invention relates to the technical field of lasers, and provides a double-gain-medium Q-switched laser and a constant-power pulse width adjusting method.The laser comprises a first pumping source, a second pumping source, an optical fiber beam combiner, a beam shaping system and a laser resonant cavity, the laser resonant cavity comprises a reflecting mirror, a first gain medium, a second gain medium, a polarization selector, a quarter-wave plate, a Q switch and an output mirror which are arranged in sequence; the first gain medium is used for absorbing first pumping light, the second gain medium is used for absorbing second pumping light, and the pumping power of the first pumping source and the pumping power of the second pumping source can be independently controlled. By changing the pumping power of the two pumping sources, real-time adjustment of the pulse width of the laser under the constant output power is achieved, the structure is compact, and control is easy and convenient.

Hybrid integrated photonic integrated circuit laser comprising a photonic integrated circuit including an elongated optical waveguide comprising an elongated gain medium waveguide, at least a first and second optical reflector, the gain medium waveguide being located or extending between the first and second optical reflectors and being located inside an optical cavity to provide optical feedback. Further comprising a pump laser diode to provide electromagnetic radiation to the gain medium waveguide. The elongated optical waveguide, and the first and second optical reflectors are monolithically integrated inside the photonic integrated circuit. The gain medium waveguide comprises a rare-earth ion implanted silicon nitride waveguide core. The pump laser diode is positioned adjacent to the at least one photonic integrated circuit and is edge coupled or facet coupled to a lateral edge or a facet of the photonic integrated circuit to provide pump radiation to the rare-earth ion implanted silicon nitride waveguide core.

Aspects of the present disclosure describe semiconductor DFB laser structures including both pumped and unpumped regions / sections wherein unpumped regions act as DBR reflector(s) while pumped regions act as DFB gratings. Semiconductor DFB laser devices according to aspects of the present disclosure include an active layer that extends the length of the device that is identical in both pumped and unpumped regions / sections.

There is provided an external cavity laser, including: a photonic integrated platform including a gain chip providing a gain medium and at least one reflector chip, the photonic integrated platform including first and second functional layers made of different materials; a resonant cavity optically coupled to the gain medium and including a first and a second micro-ring resonators (MRR) in a Vernier configuration, the first MRR and second MRR extending within respective ones of the first and second functional layers made of different materials and having corresponding group indices, the first and second MRRs having different radii selected in view of said corresponding group indices; and a tuning mechanism for tuning a spectral response of at least one of the first and second MRR.

The application discloses a 2 mu m wave band GHz solid mode-locked device based on electric regulation, belongs to the technical field of ultrafast laser and semiconductor device, and comprises a high-brightness fiber laser pumping source, an optical focusing coupling system for focusing and collimating the pumping source, a first input mirror for transmitting and reflecting the focused laser beam, a gain medium for generating and amplifying laser, a second input mirror and a third input mirror for reflecting the focused laser beam, and a two-dimensional Bi2O2Se electro-optic modulation device for modulating the laser beam. The application develops the two-dimensional Bi2O2Se electro-optic modulation device with low saturation flux, fast saturation recovery time and moderate modulation depth, so as to break through the technical barrier of solid GHz femtosecond mode-locked.

The invention relates to the technical field of lasers, and provides an intelligent regulation and control lock-losing prevention cooperative output ultrafast laser system and a control method thereof, and the intelligent regulation and control lock-losing prevention cooperative output ultrafast laser system comprises a pumping module which is used for sending pumping light; the first beam splitter is arranged on a light path of the pump light, and a first input end of the first beam splitter is connected with the pump module; the input end of the dispersion filtering assembly is connected with the first output end of the first beam splitter, and the dispersion filtering assembly is used for performing dispersion compensation to output laser; the first pulse width adjusting assembly and the second pulse width adjusting assembly are respectively connected with different output ends of the dispersion filtering assembly; the laser is used for outputting first laser and second laser. According to the intelligent regulation and control anti-lock-losing collaborative output ultrafast laser system, the flexibility, the process development efficiency and the adaptability of multi-pulse-width pulse output are remarkably improved, and the differentiated requirements of different high-precision application scenes are met.

The invention belongs to the technical field of optics, and relates to a vortex laser capable of regulating spiral chirality. The invention aims to solve the problem that single chiral output cannot be realized due to degeneration of a + / -l topological charge vortex mode in a resonant cavity in the prior art. The vortex laser comprises a pumping source, a gain crystal, a concave mirror, an output coupling mirror and an adjustable scattering sheet arranged in a cavity, a non-periodic SiO2 nano-particle film is arranged on the surface of the scattering sheet, the transverse position of the scattering sheet is adjusted through a two-dimensional translation platform, mode symmetry is broken through differential loss generated by interaction of + l and-l vortex light beams and a random scattering structure, and active, continuous and reversible regulation and control of spiral chirality are achieved. The output coupling mirror is provided with a central micropore to select vortex mode oscillation and output, and astigmatism conversion and CCD detection are matched to accurately judge the chirality of an output light beam. The scheme is compact in structure, high in stability and suitable for the fields of optical tweezers, quantum communication, super-resolution imaging and the like.

A laser apparatus includes an optical resonator including an output mirror and a grating, a laser chamber disposed in an optical path of the optical resonator and including a pair of first electrodes configured to apply voltage to a laser gain medium, a power supply, and a first prism that is provided between the laser chamber and the grating and that expands a light beam output from the laser chamber and directs the expanded light beam toward the grating. The first prism includes a pair of second electrodes, and a first electro-optic crystal that changes a direction in which the light beam travels toward the grating when voltage is applied to the second electrodes from the power supply.

The invention relates to the technical field of all-solid-state lasers, and particularly provides a master-slave pulse delay controllable ultraviolet dual-wavelength double-pulse laser, which comprises a pumping source and a V-shaped folded resonant cavity, and is characterized in that the V-shaped folded resonant cavity comprises an input mirror, a gain medium, a Q-switched crystal, a total reflective mirror, a frequency doubling crystal and an output mirror; wherein the Q-switched crystal performs step-type modulation through a double-step electric signal, the double-step electric signal sequentially comprises a high-voltage stage, a low-voltage stage and a voltage-reducing stage in a modulation period, and the double-step electric signal sequentially generates jump from the high-voltage stage to the low-voltage stage and jump from the low-voltage stage to the voltage-reducing stage in a pumping period. The dual-wavelength master pulse and the dual-wavelength slave pulse are respectively output, and the time delay between the dual-wavelength master pulse and the dual-wavelength slave pulse can be controlled by adjusting the duration of the low-voltage phase. According to the invention, ultraviolet dual-wavelength double-pulse output is realized, and master-slave pulse delay is flexible and controllable.

The invention relates to the technical field of solid lasers, and particularly provides a narrow-linewidth tunable dual-wavelength laser output system based on data driving, which comprises a pumping source, a resonant cavity, a data acquisition unit and a data receiving and driving device, a single gain medium, two F-P etalon and an F-P angle regulator are arranged in the resonant cavity, the inclination angles of the two F-P etalon are adjusted through an F-P angle adjuster so as to perform longitudinal mode selection and wavelength tuning on the output laser of the resonant cavity; a neural network screening model is arranged in the data receiving and driving device, the neural network screening model is used for learning the mapping relation between intracavity parameters and output laser optical parameters, and dual-wavelength simultaneous locking and line width prediction are achieved through dual-etalon collaborative mode selection and data driving of the neural network screening model. According to the invention, the complexity of the system is greatly simplified, and dual-wavelength, narrow-linewidth, high-stability, repeatable and automatic laser output regulation and control which cannot be achieved by a traditional architecture are realized functionally.

The invention discloses a cavity parameter optimization method for a bicrystal regeneration amplification structure. The bicrystal regeneration amplification structure to be optimized comprises an optical resonant cavity, two gain crystals arranged in the optical resonant cavity, a pumping source, a pumping light path system matched with the gain crystals, an optical switch arranged in the optical resonant cavity and a reflector used for forming the resonant cavity, the method comprises the following steps: determining the relative position and spacing of two gain crystals in an optical resonant cavity; calculating and designing the physical cavity length of the optical resonant cavity according to the electro-optical switch response time of the optical switch; the curvature radius of the reflector is calculated and selected according to the thermal lens effect possibly generated by the gain crystals under high-power pumping, and the pumping power distribution of the pumping light path system to the two gain crystals is optimized according to the output power of the pumping source and the thermal performance of the two gain crystals. And pumping energy and heat load generated by the pumping energy are dispersed on the two gain crystals.

An amplified laser device is provided with one or more Micro-Electro-Mechanical System (MEMS) Micro-Mirror Arrays (MMAs) having tip, tilt and piston capability positioned on either side of the optical amplifier to correct the profile of the beam to improve the gain performance of the optical amplifier or to compensate for atmospheric distortion while steering the amplified beam over a FOR. The MEMS MMAs may be positioned in front of, behind or on both sides of the amplifier. The MEMS MMAs can be configured to optimize the combined amplifier performance, static and time varying, and compensation for atmospheric distortion together or separately.

The invention provides a portable mid-infrared pulse fiber laser, a working method and a laser system thereof. The portable mid-infrared pulse fiber laser comprises a pumping source, a first convex lens, a dichroic mirror, a second convex lens, a rare earth ion doped fiber, a third convex lens, a fourth convex lens, a vanadium dioxide saturable absorber, a semiconductor heating sheet, a direct current power supply and a wire which are sequentially arranged along an optical axis. According to the working method, the temperature of the vanadium dioxide saturable absorber is controlled by starting electric control of the semiconductor heating sheet and adjusting the control voltage of the direct-current power supply; when the temperature reaches heat balance, a pumping source is started; the power of the pumping source is increased until the power threshold of the passive Q-switched pumping light is reached, and the dichroscope outputs mid-infrared passive Q-switched pulse laser. The laser system comprises the laser and a control circuit. Under the condition of low pumping power, high-peak-power, high-pulse-energy and nanosecond-level narrow-pulse-width mid-infrared passive Q-switched pulse fiber laser output is achieved; and the portability and the practicability of the laser are improved due to the portability and long-endurance design.

The invention relates to an intermediate infrared micro comb generation system and method, in particular to an intermediate infrared micro comb key starting type generation system and method based on a negative thermo-optic effect. In order to solve the problems that a traditional mid-infrared light frequency comb is limited in size, weight, power consumption and repetition frequency, and the mid-infrared band faces the defects that the light source tuning rate is low, the micro-cavity quality factor is low and the key device performance is poor, the invention provides the mid-infrared light frequency comb. The intermediate infrared micro comb key starting type generation system based on the negative thermo-optic effect comprises a pumping unit used for providing pumping light, a microcavity unit used for generating a nonlinear four-wave mixing process and the negative thermo-optic effect, and a detection unit used for receiving an intermediate infrared micro comb and recording time domain information and frequency domain information of the intermediate infrared micro comb. Meanwhile, the invention provides a key-starting type generation method of the mid-infrared micro comb based on the negative thermo-optical effect, which is self-starting, wide in spectral bandwidth, high in repetition frequency and high in stability based on the system.

A photonic integrated circuit (PIC) assembly comprising a semiconductor optical amplifier (SO A) array and a U-tum chip. The SOA array includes an input SOA and a plurality of SOAs. The input SOA and the plurality of SO As are arranged parallel to one another. The U-tum chip includes an optical splitter and a waveguide assembly. The optical splitter is configured to receive amplified input light propagating in a first direction from the input SOA, and divide the amplified light into a plurality of beams. The waveguide assembly guides each of the plurality of beams to a corresponding SOA of the plurality of SOAs, and adjusts a direction of prorogation of each of the guided beams to be substantially parallel to a second direction that is substantially opposite the first direction. And each of the plurality of SOAs are configured to amplify their respective beams to generate a plurality of amplified output beams.

The invention discloses a high-power micro-cavity optical frequency comb generation device and method, and solves the problems that an existing optical frequency comb system needs to adopt a high-speed tunable laser to carry out precise scanning locking on micro-cavity resonance, or depends on distributed feedback type semiconductor laser with extremely narrow linewidth to carry out optical injection feedback on an ultra-high-quality micro-cavity; in order to solve the problems of complex system structure and operation due to the fact that the existing optical frequency comb has the advantages of high repetition frequency, high comb power and wide spectral range, pumping is carried out by a pumping unit, optical frequency comb generation and synchronous power amplification are carried out through an active gain microcavity, and the channel interval (100GHz) of the optical frequency comb meets the international communication standard. The power of a single comb tooth reaches a hundred mu W level and is improved by 2-3 orders of magnitude compared with a common Kerr microcavity optical frequency comb scheme (a typical value is a hundred nW level), so that weak signal power amplification is not needed, and the Kerr microcavity optical frequency comb has important application value in the field of optical communication.

A light source apparatus (200) includes a gas discharge stage (210) and a metal fluoride trap (300). The gas discharge stage includes an optical amplifier (206) and a set of optical elements (250, 260). The optical amplifier includes a chamber (211) configured to hold a gas discharge medium (213), the gas discharge medium outputting a light beam. The set of optical elements is configured to form an optical resonator around the optical amplifier. The metal fluoride trap is configured to trap metal fluoride dust generated from the gas discharge stage. The metal fluoride trap includes an electrostatic precipitator (320) and a packed-bed filter (400, 402, 404) disposed around the electrostatic precipitator. The packed-bed filter includes a plurality of beads configured (406, 408) to absorb metal fluoride dust (208).

The application belongs to the technical field of ultra-short pulse laser, and particularly relates to a nonlinear fiber loop and full positive dispersion pump protection type 8-shaped cavity and a laser. The nonlinear fiber loop comprises a first circulator provided with three ports, a second circulator provided with three ports and a beam combiner. The first port of the first circulator is used to connect the third port of a coupler, the second port of the first circulator is connected with the third port of the second circulator, and the third port of the first circulator is connected with the output end of the beam combiner. The first port of the second circulator is used to connect the fourth port of the coupler through a first gain fiber, the second port of the second circulator is connected with the signal end of the beam combiner, and the first input end of the beam combiner is connected with a first pump light source.

A laser component according to one embodiment of the present invention is provided with: a first optical output unit that outputs first pulsed laser light, and has a first optical resonator and a first laser medium which is disposed in the first optical resonator and to which excitation light is inputted in the optical axis direction; a second optical output unit that outputs second light different from the first pulsed laser light, and has a second laser medium to which the excitation light is inputted; and a laser medium that has a first medium region disposed in the first optical resonator and a second medium region disposed in the second optical output unit. The first laser medium and the second laser medium are a common laser medium, the wavelength regions of the first pulsed laser light and the second light are the same, and the second optical output unit is adjacent to the first optical output unit when viewed in the optical axis direction of the first optical output unit.

The present invention provides a resonator system, including N resonator stages cascaded, where N is an integer greater than 1. Each of the resonator stages includes a resonant cavity and a thermal phase shifter. In each of the resonator stages, the thermal phase shifter is integrated on the resonant cavity. The thermal phase shifters in the N resonator stages cascaded are sequentially connected in series. A first end of the thermal phase shifter in a first resonator stage is connected to a preset voltage, a second end of the thermal phase shifter in an Nth resonator stage is grounded, and a connection node of the thermal phase shifters in adjacent resonators stages is connected to an adjustable voltage, wherein resistances of the thermal phase shifters in the N resonator stages are all equal. The resonator system according to the present invention enables that a change in a phase difference between adjacent resonant cavities can be linearly proportional to a control voltage connected to the connection node of the thermal phase shifters in the adjacent resonator stages, which simplifies a control method for a vernier micro-ring resonator and reduces the number of control voltages required. The present invention further provides a tunable laser and a control method for a resonator system.

The invention provides a low-noise single-frequency laser, which comprises a linear resonant cavity for realizing light field local constraint and gain amplification, and is characterized in that the linear resonant cavity comprises a gain optical fiber, an all-dielectric C-waveband narrow-band high-reflection metasurface structure and a miniature BIC high-Q-value metasurface structure; the first end of the gain optical fiber is welded and fixed with the all-dielectric C-waveband narrow-band high-reflection metasurface structure, and the second end of the gain optical fiber is welded and fixed with the miniature BIC high-Q-value metasurface structure; wherein the all-dielectric C-waveband narrow-band high-reflection metasurface structure is used for screening a C-waveband target wavelength through a narrow-band high-reflection characteristic and suppressing a non-target mode at the same time; the miniature BIC high-Q-value metasurface structure realizes a high-Q-value characteristic by suppressing radiation loss, so that the laser line width is efficiently compressed, and noise is suppressed. The low-noise single-frequency laser provided by the invention can finally realize low-noise and narrow-linewidth single-frequency laser output.

The utility model provides a high-power wavelength tunable fiber laser, which comprises a tunable wavelength seed source module, a fiber amplification module and an isolation output module, the tunable wavelength seed source module is used for generating signal light with different wavelengths, the fiber amplification module is used for amplifying the signal light, and the isolation output module is used for outputting the amplified signal light; the isolation output module comprises an output isolator; the optical fiber amplification module is sequentially provided with a first optical fiber amplification unit, a second optical fiber amplification unit, a third optical fiber amplification unit and a fourth optical fiber amplification unit along the propagation direction of the signal light; according to the utility model, the tunable wavelength seed source module outputs signal light with different wavelengths, and then the signal light is amplified by the four-stage MOPA amplification system and then is output by the output isolator, so that high-power tunable laser output is realized, the application scene is wide, and the all-fiber scheme is adopted, thereby being convenient, reliable and high in integration level.

An excimer laser (100) includes a chamber (110) for containing a gas mixture between a back end (120) and a front end (130) of a linear laser resonator (102), a convex end mirror (122) defining the back end (120), and a plurality of outcoupling mirrors collectively defining the front end (130). The outcoupling mirrors are distributed along an optical axis (190) of the resonator (102) and have respective normal vectors (nR and nF) directed toward the back end (120). The normal vectors (nR and nF) comprise four normal vectors which are not parallel to each other, wherein no three of the four normal vectors which are not parallel to each other are coplanar. These different orientations of the outcoupling mirror cooperate with the convex end mirror (122) to blur fine structures in the output beam (182) of the resonator (102).

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 utility model discloses a wavelength tunable 2 [mu] m single longitudinal mode all-solid-state pulse laser, which belongs to the technical field of lasers, and comprises a pumping source, the output end of the pumping source is provided with a 1: 2 optical coupling system, the output end of the 1: 2 optical coupling system is provided with an input mirror, the output end of the input mirror is provided with a Tm: YAP crystal, and the Tm: YAP crystal is used for generating 2 [mu] m laser; the output end of the Tm: YAP crystal is provided with an acousto-optic modulator, the output end of the acousto-optic modulator is provided with an etalon, the output end of the etalon is provided with a birefringence filter, and the output end of the birefringence filter is provided with an output mirror. The wavelength tunable 2 [mu] m single longitudinal mode all-solid-state pulse laser is simple in structure, can stably generate 2 [mu] m laser, provides a wider wavelength tuning range and more direct tuning, and realizes narrower spectral width at the same time.

The application discloses a high-brightness and high-power Raman photonic crystal fiber laser, which comprises a pump source and a Raman gain medium connected with the pump source; the Raman gain medium is a full-solid photonic crystal fiber in a long cone shape; the full-solid long cone photonic crystal fiber is continuously and proportionally reduced in the whole cone area, and constantly satisfies the double-mode operation condition in the working wavelength range; the thick end is the input end, and the thin end is the output end; the full-solid photonic crystal fiber comprises a core and a cladding from inside to outside; the cladding microstructure comprises a high-refractive-index matrix material and a low-refractive-index filling material; the filling material is filled in the matrix material and is arranged in a two-dimensional closest equilateral triangle lattice periodically; the microstructure of the filling material is arranged in a concentric circle along the radial direction of the center of the core, and the number of the microstructure is 3-5 circles. The laser can effectively improve the laser beam quality of the output end and realize single-mode laser output.

The application discloses a method for generating a dual-wavelength pulsed laser by using a lens array, which comprises the following steps: a laser is used as a pumping light source to emit a laser beam; the laser beam is adjusted by a beam shaping system; the adjusted laser beam is converted into a plurality of sub-beams by a micro-lens array 4f system; the plurality of sub-beams are reflected back and forth in a Fabry-Perot cavity; the reflection of the plurality of sub-beams in the Fabry-Perot cavity is subjected to a laser Raman crystal; and the plurality of sub-beams are emitted from the surface of the Fabry-Perot cavity to become a dual-wavelength pulsed laser source. The application significantly improves the laser frequency conversion efficiency and the power of a new wavelength, and improves the utilization rate of the laser.