36results about How to "Laser output is stable" patented technology

The invention discloses a portable laser deruster. The portable laser deruster comprises a laser system, a light beam adjusting system and a conductive fiber. The laser system is connected with the light beam adjusting system through the conductive fiber. The laser system comprises a main case, a laser device, a control plate and an output mirror, wherein the main case is provided with straps, and the laser device is located in the main case. The corresponding output end of the control plate is connected with a data interface of the laser device. The output end of the laser device is provided with the output mirror. The light beam adjusting system comprises an optical isolation channel and an optical reshaping probe. The optical isolation channel comprises an optical channel shell and an isolation sleeve, wherein the optical channel shell is provided with a handle, and the isolation sleeve is arranged in the optical channel shell. A clamping ring is arranged at one end of the optical channel shell, and the other end of the optical channel shell is connected with the optical reshaping probe. A beam expansion mirror, a scanning galvanometer and a light condensation system are sequentially arranged in the optical reshaping probe in the direction from the junction between the optical reshaping probe and the optical channel shell. The light condensation system comprises a mirror bracket, an F-Q field lens ring and an F-Q lens. The portable laser deruster has the advantages of being simple in structure, convenient to use, safe, and stable, thereby being beneficial to field operation.

The invention discloses a thulium-doped microsphere cavity laser and a preparation method thereof, and belongs to the micro-optical device technical field. The thulium-doped microsphere cavity laser is composed of a thulium ion-doped microsphere coupling tapered optical fiber; an 808 nm laser is adopted as a pump light source; the tapered optical fiber is adopted to couple thulium-doped microspheres; and 2-micron laser can be outputted from the other end of the tapered optical fiber. A sol-gel method is adopted to prepare a thulium ion-containing solution; a carbon dioxide laser is adopted toheat the tail end of a communication optical fiber coated with the solution, and therefore, a thulium ion-doped carbon dioxide microsphere can be prepared; a heating and stretching method is adopted to obtain a tapered optical fiber by means of a ceramic heater, the diameter of the tapered region of the tapered optical fiber ranges from 1 micron to 5 microns; the microsphere is coupled to the tapered optical fiber under the control of a three-dimensional platform, so that a microsphere laser which is capable of stably outputting 2-micron band laser, with an 808 nm laser adopted as a pump source, a microsphere adopted a resonant cavity, and thulium ions adopted as a working substance, can be obtained. Since the commercially available 808 nm laser is adopted as the pump light source, the practical value of the thulium-doped microsphere cavity laser of the invention can be greatly improved. The thulium-doped microsphere cavity laser has the advantages of simple fabrication, low threshold,miniaturization and stable output.

The invention discloses a processing method and device of a transparent material, and provides an optical fiber laser of which the wave length is 1020 nm to 1090 nm. The processing method is characterized in that laser beams output by a seed laser are subjected to energy amplification through an optical fiber amplifier, laser pulse trains are output, each pulse train comprises at least two laser pulses, pulse width is smaller than 200 ps, peak power of the pulses is larger than 100 kW, the time among the laser pulses in each pulse train is smaller than 90 ns, the interval among the pulse trains is larger than 240 ns, and the total pulse number in each second is larger than 50,000, wherein ultrafast laser beams output by the laser are subjected to energy amplification only through the optical fiber amplifier; and the laser is focused on a to-be-processed position of the transparent material, a focus position is moved, processing is carried out according to a set track, a focus point isgradually risen, and the transparent material is processed from bottom to up. According to the processing method, material removal efficiency can be greatly improved, a heating or etching follow-up procedure is not required, and bevel angles are avoided.

The present invention relates to a full-polarization-maintaining mode-locked fiber laser based on various soliton state output of a chirped fiber Bragg grating. The full-polarization-maintaining mode-locked fiber laser comprises a pumping source and an all-fiber linear laser resonator composed of a wavelength division multiplexer, the chirped fiber Bragg grating, a fiber coupler, a focalizer, a semiconductor saturable absorber, a Yb-doped gain fiber and a PM 980 polarization-maintaining fiber. The pumping source is connected with the pumping end of the 980/1030 nm wavelength division multiplexer, one port of the wavelength division multiplexer is used as an output end, and the other output end is finally focused on the semiconductor saturable absorber orderly via the chirped fiber Bragg grating, the Yb doped gain fiber, the fiber coupler and the focalizer. The full-polarization-maintaining mode-locked fiber laser of the present invention is simple in structure, very small in size, lower in cost and high in mode-locked stability, can realize the self-starting, has the output pulse reaching hundreds of femtoseconds, can be widely applied to the material modulation characteristic measurement, a fiber optical frequency comb and a fiber amplification system, and has the better application prospect and business value.

The invention relates to a light source of a high-capacity fiber Bragg grating sensing demodulating system, in particular to a tunable circular laser comprising a semiconductor optical amplifier (SOA), two optical isolators, a broadband filter, a tunable F-P filter and a 1*2 optical coupler having a 40/60 splitting ratio. The output end of the semiconductor optical amplifier is connected to the first optical isolator through a fiber. The first optical isolator is connected to the tunable F-P filter through a fiber. The tunable F-P filter is connected to a first port of the 1*2 optical coupler through a fiber. A second port of the 1*2 optical coupler is connected to the second optical isolator through a fiber. The second optical fiber is connected to the broadband filter through a fiber. The broadband filter is connected to the input end of the semiconductor optical amplifier through a fiber. The 1*2 optical coupler outputs laser from the third port. The tunable circular laser is capable of outputting tunable circular fiber laser.

The invention relates to a control device for laser constant power output and a laser processing device. The control device emits a laser beam through a laser, a power detection module rapidly detectsa single pulse energy signal value of the laser beam, a power correction module obtains a power correction value according to the single pulse energy signal value and a preset laser power value, andtherefore, the laser is controlled to output a laser beam with constant power according to the power correction value. In the detection process, the single pulse energy signal value can reflect the pulse laser energy of each time point, and therefore, the accuracy of detection is improved. The entire control process is simple and fast, and the function of the quick, accurate and stable power output of the laser can be achieved.

The invention discloses a 1.0-micron ultralow-noise single-frequency optical fiber laser. The laser comprises a high-reflectivity optical fiber Bragg grating, a high-gain optical fiber, a low-reflectivity optical fiber Bragg grating, a TEC thermoelectric refrigerator, a pump laser, an optical wavelength division multiplexer, an optical filter, an optical isolator, a medium-frequency-band intensitynoise suppression module and a low-frequency-band intensity noise suppression module. The high-gain optical fiber serves as a gain medium of laser light; laser oscillation is formed under the pumpingof pump light; output laser light is filtered by the optical filter to amplify spontaneous radiation light, so that stable and single longitudinal mode laser output is realized; the laser light enters the medium-frequency-band intensity noise suppression module; the intensity noise near a laser relaxation oscillation peak is effectively suppressed by a semiconductor optical amplifier, and laser power amplification is carried out; then the low-frequency-band intensity noise suppression module is used for suppressing the low-frequency-band intensity noise; and finally high-power, ultralow-noise, narrow-line-width and single-frequency optical fiber laser output is realized.

The invention relates to a tunable multi-wavelength fiber laser with a variable all-fiber wavelength interval, and belongs to the fields of optical fiber communication and instrumentation to simultaneously realize the tuning of a wavelength range and the change of the wavelength interval. In the fiber laser, a polarization controller 1, a polarization maintaining fiber 1, a polarization controller2, and a polarization maintaining fiber 2 are connected between a port 6 and a port 7 to form a two-stage Sagnac fiber filter. A port 9 is connected to a polarization controller 3. The port of the polarization controller 3 is connected to a polarization maintaining fiber 3 to form a Lyot filter. Adjusting the polarization controller 3 can realize the tuning of the wavelength range. Adjusting thepolarization controller 1 and the polarization controller 2 can realize the change of the wavelength interval. Highly nonlinear fibers can form a four-wave mixing effect, suppress wavelength competition, and can change the number of wavelengths. The laser is flexible in output wavelength, is beneficial to the application in optical wavelength division multiplexing systems.

The invention relates to a laser crystal structure of an intracavity frequency doubling laser, which includes a plurality of layer structures, which are an optical medium film layer at an incident end, an undoped crystal layer, a doped crystal layer, an undoped crystal layer, and a frequency doubling crystal layer and the optical dielectric film layer at the output end. In the present invention, the undoped crystal layer is bonded to both ends of the doped crystal layer, and the optical medium film is far away from the doped crystal, which can reduce the thermal effect and damage to the optical medium film; the undoped crystal layer is beneficial to the The mixed crystal layer and the frequency doubling crystal layer are bonded together, which facilitates the design and adjustment of the laser and greatly reduces the volume of the laser.

The invention relates to an automatically adjustable laser attenuator including a horizontally arranged lens barrel, wherein a light-in port of the lens barrel is provided with an entrance concave lens, an entrance convex lens and an aperture in sequence, the power output end of an aperture adjustment mechanism is connected to an adjustment handle of the aperture, a fixed polarizer and a rotatingpolarizer are disposed between the entrance convex lens and the aperture, a second partial mirror, an exit concave lens and an exit convex lens are sequentially arranged in a light-out port of the lens barrel, the first partial mirror is disposed between the aperture and the exit convex lens, a laser area sensor and a laser energy meter probe are respectively located in the reflected light paths of the first and second partial mirrors; the rotation shafts of the two stepping motors in the control circuit are respectively connected to the power input ends of the aperture adjustment mechanism and the rotating polarizer, and the signal input port of the control circuit is connected to the laser area sensor and the laser energy meter probe. The automatically adjustable laser attenuator can adjust the energy and cross-sectional area of the laser beam in real time, with accurate control and high precision.

The invention relates to a W type antimony-based semiconductor laser with gradually varied Ga In proportion, which belongs to the technical field of semiconductor lasers. The existing InAs/GaInSb W type antimony-based semiconductor laser is difficult to realize luminescence at room temperature, and is less in output power of luminescence at low temperature (73K). The W type antimony-based semiconductor laser with gradually varied Ga In proportion sequentially comprises a GaSb substrate, a GaSb buffer layer, a P type GaSb contact layer, a P type quantum well, an intrinsic quantum well, an N type quantum well and an N type InAs contact layer from bottom to top, wherein the P type quantum well, the intrinsic quantum well and the N type quantum well respectively have a multi-period structure; the structure of each single-period quantum well in each multi-period structure is a sandwich structure that a GaInSb hole quantum well is clamped by double InAs electronic quantum wells; the outer layer is a pair of AlSb alloy limiting layers. The W type antimony-based semiconductor laser with gradually varied Ga In proportion is characterized in that the GaInSb hole quantum well is formed by 3 to 9 layers of Ga1-xInxSb layers, wherein x is equal to 0.05-0.35; the value of x of the Ga1-xInxSb layer in the middle is maximal; the Ga1-xInxSb layers on two sides are distributed in 1 to 4 levels from the middle to two sides; the values of x of two Ga1-xInxSb layers at the same level are the same, and the values of x of the Ga1-xInxSb layers from the middle to two sides are gradually reduced.

The invention discloses a preparation method of a saturable absorber. The preparation method comprises the following steps: mixing cesium-doped tungsten oxide nanorods, a film-forming agent and water to form a mixed solution; performing ultrasonic dispersion on the mixed solution by an ultrasonic machine to form a suspension; and coating the suspension on the surface of glass, and drying to obtain the saturable absorber of the cesium-doped tungsten oxide nanorod. The cesium-doped tungsten oxide nanorod and the film-forming agent are used as raw materials to prepare the saturable absorber, the method is simple, and the universality is high. In addition, the invention further discloses a pulse fiber laser using the saturable absorber, possibility is provided for performance optimization of the pulse fiber laser and implementation of an infrared pulse fiber laser in a longer wave band, and application cost can be greatly reduced.

The invention discloses a double-clad ytterbium-doped fiber, and relates to the technical field of optical fibers. The fiber comprises, in order from the inside to the outside, a core, an inner cladding and an outer cladding; the core includes, from the inside to the outside, a circular central core region, and at least four annular doped core regions concentrically disposed with the central coreregion, wherein the concentrations of ytterbium ions of the central core region and the four annular doped core regions sequentially increases from inside to outside; and both the inner cladding and the outer cladding are quartz claddings. The double-clad ytterbium-doped fiber provided by the invention optimizes the power distribution of the ytterbium-doped fiber and improves the stable working capability under the condition of high-power fiber laser output.