77results about How to "Increase pump power" patented technology

A monolithic passively Q switched microlaser includes an optically transparent heat conductive element bonded to a gain medium, which is in turn bonded to a saturable absorber, which may also be bonded to a second optically transparent heat conductive element. Only the gain medium and saturable absorber are disposed within the laser resonator.

A method to increase the output power of narrow-linewidth rare earth-doped fiber amplifiers by suppressing simulated Brillouin scattering. The fiber amplifier is seeded with two or more lasers having frequencies and input powers that are sufficiently different. The seed signal with the highest emission cross section (e.g., signal 2) initially experiences the greatest gain. If signal 2 is also given sufficiently greater input power than signal 1, it will be amplified to its maximum value before the seed signals have reached the midpoint of the gain fiber. Beyond that point, the signal having the lower emission and absorption cross sections (signal 1) and significantly lower input power will continue to experience gain by power transfer from both signal 2 and the pump light, attaining a power output well beyond what the maximum output would have been had the amplifier been illuminated with a single frequency beam. This technique effectively reduces the Stokes light of signal 1, whereby higher power narrow-linewidth optical fiber amplifiers may be realized.

The present invention discloses an end pumped order variable gradient adulterate composite lath laser amplifier, which comprises a laser gain medium, seed source, pumping source, coupling lens duct, lath cooling heat sink and indium transition layer, characterized in that the laser gain medium is N-order order variable gradient adulterate composite ceramic lath and is composed by 2N+3 segments that is sub-lath in middle section that has highest luminous ion concentration decreases, each N segment sub-lath with luminous ion concentration decreases gradually towards two ends, and sub-lath with zero adulterate on two ends, wherein N is positive integer. The present invention can improve temperature distribution homogeneity and decrease biggest thermal stress, and further realize laser output of high average power and high beam quality.

A plant is adapted to feed paint to robots for automatic spray application of paint on objects provided with a container (5) made loosenable and removable from the robot for exchange for another such container when there is a desire to have more paint in the container and/or change paint. The plant has a station (8) with containers filled with paint, a transport device (15-18) with means (16) for transporting a container containing paint from said station when said desire arises to the robot and deliver this thereto as well as means adapted to receive a container to be exchanged from the robot and transport it away for taking care thereof.

An improved fiber array arrangement is provided that incorporates spacing and/or spacers between active fibers in a winding to reduce maximum active fiber temperature, with the spacing/spacer material distributed to minimize heating at locations of high pump power. Spacer material such as “dark” fibers and/or metal wires of similar diameter as the active fiber may be employed to aid winding/bundling of active fibers. Further, the use of channels, grooves, wall material and combinations thereof aid structural support/guidance for the winding/bundling of active fibers while providing predefined spacing and heat conductivity that reduces the maximum thermal temperature of the active fiber below design thresholds.

The invention disclose a two-crystal compound gain inner cavity Raman yellow light laser which comprises: the gain laser diode pumping source emits 808nm pumping light which is partly absorbed by the Nd: YAG crystal and Nd: YVO4 crystal coaxial placed, the two crystals provide the laser gain at the same time, The 1.06 mum laser polarization of the base frequency is Pi polarization which generates in the resonant cavity which is composed of the whole mirror and the yellow light output mirror; the base frequency laser passes Nd: YVO4 crystal obtains the Raman gain, 1.18 mu m stokes light generates outreaching by the oscillation after outreaching the Raman scattering threshold value; 1.18mum anti-Stokes light is multiplied through the crystal multiplier, the 588nm yellow light is generated and output through the output mirror. The technical scheme depends on double crystal compound gain to guarantee laser polarization so as to increase the multiplier efficiency; higher pump power is exerted depending on high Nd: YAG crystal heat rupture threshold value, therefore the yellow output power is increased.

The invention relates to a side pump all fiber and a laser and an amplifier based on the all fiber. The side pump all fiber comprises a gain fiber and a transmission fiber which are welded without a melting point. The invention provides the side pump all fiber without the fiber melting point at a pump section and with high pump coupling efficiency and a good heat radiation effect, and provides the laser and the amplifier based on the all fiber.

There is provided a two-stage brightness converter. A first brightness conversion stage has a laser cavity having a first optical waveguide doped with an active ion defining a first optical band with optical absorption, a second optical band with optical absorption and optical gain, and a third optical band with optical gain. The first laser cavity is pumped with a pump power having a wavelength in the first optical band to generate an intermediate optical signal in the second optical band. A second brightness conversion stage which is in cascade with the first brightness conversion stage comprises a second optical waveguide doped with the same active ion. The second brightness conversion stage is pumped with the intermediate optical signal to obtain a high brightness optical signal in the third optical band.

A chip-shaped laser medium (12) is side pumped to improve mode matching between the pumping energy (50) and lasing mode volume (36). The chip thickness (44) and laser medium doping level can be designed and controlled to ensure adequate pumping coupling efficiency. The chip shape can also be employed to provide greater chip surface areas (22) for cooling the laser medium (12). The laser pumping package (70), gain module (10₁), and chip-shaped design can be scalable to offer higher pumping power and high output power. Different orientations of the gain modules (10₁) with respect to each other can be used to provide better lasing mode quality.

The invention provides a high-power inner cavity frequency doubling single-frequency laser device. The high-power inner cavity frequency doubling single-frequency laser device comprises a pumping source (1), a gain crystal (2), a ring-shaped resonant cavity, an isolator, a frequency doubling crystal (6) and a thermal lens effect compensating plate (5), wherein the isolator is composed of a magneto-optical medium (3) and a half wave plate (4) which are placed in a permanent magnet. The thermal lens effect compensating plate (5) is placed close to the magneto-optical medium (3). The thermal lens effect compensating plate (5) is an optical crystal thin plate with a certain thickness, has a negative thermo-optical coefficient and is provided with two parallel light-transmitting faces. The thermal lens effect of the magneto-optical medium (3) can be dynamically compensated for. The thermal lens effect of the magneto-optical medium is dynamically compensated for through the crystal thin plate with a certain thickness and a negative thermo-optical coefficient, the inside-cavity light beam quality degradation caused by the thermal lens effect of the magneto-optical medium can be relieved or eliminated, the stable area of the laser device is expanded, and therefore the high-power inner cavity frequency doubling single frequency laser device stably running is obtained.

A kind of noise pulse generator, the optical fiber ring cavity includes a wavelength division multiplexer, a doped optical fiber, an optical isolator, a polarizer, a polarization controller and a fiber coupler connected in sequence with optical fibers to form a closed-loop structure, and a pump source Connected with the pump port of the wavelength division multiplexer, the fiber coupler includes a loop output port, a target output port and an input port, and the input port and the common port of the wavelength division multiplexer pass through a doped optical fiber, an optical isolator, The polarizer and the polarization controller are sequentially connected to form a connection loop section, the loop output port is connected to the signal port of the wavelength division multiplexer, and the target output port is used to output "noise-like" pulses. The invention adopts fiber-optic devices to build a total positive dispersion all-fiber laser, and utilizes the Raman effect of the optical fiber to generate broadband "noise-like" pulses in the total positive dispersion region.

A lens conduit coupled solid slab laser adopts cuboid flake laser solid slab as laser medium. Said invention adopts solid core lens conduit coupling laser diode array outputted pump light to laser medium, said pump light lens conduit from laser solid slab side entering solid slab, total reflecting through slab two large face and absorbing by slab, laser solid slab having upper and lower large face and using water flowing heat sink to radiate heat, laser resonator adopting flat cavity. Said invented laser has compact structure, high coupling efficiency, good heat radiation effect, large laser output power and high light beam quality properties.

A random distributed Rayleigh feedback fiber laser based on a double-cladding weakly ytterbium-doped fiber includes: a pump laser source, a pump combiner, a cladding power stripper, and a double-cladding weakly ytterbium-doped fiber for simultaneously achieving distributed active gain and random distributed Rayleigh feedback. An output end of the pump combiner is connected with one end of the double-cladding weakly ytterbium-doped fiber, the other end of the double-cladding weakly ytterbium-doped fiber is connected with an input end of the cladding power stripper, and a concentration of ytterbium ions in the double-cladding weakly ytterbium-doped fiber is in a range of 0.5×10²³ to 1×10²⁷/m³. The laser provided by the present invention solves the problem that the existing random fiber lasers cannot simultaneously utilize distributed active gain and random distributed Rayleigh feedback with a single type of fiber.

A method for producing non-equidistant pump waves for Raman amplification of a signal which is passed via an optical waveguide, as well as a pump wave producing apparatus for producing pump waves for Raman amplification of a signal which is passed via an optical waveguide, which apparatus has at least one pump source and is set up such that it can produce pump waves at a first, a second, a third and a fourth mutually equidistant pump wavelength, having a control device which is set up such that it causes, in each case, the production of a pump wave u, v, w at the first, second and fourth pump wavelengths, with the control device being set up such that no pump wave is produced at the third pump wavelength, so that a non-equidistant pump channel pattern is achieved overall.

In the English translation document, please add the paragraph at page 8 line 1, after the newly added ABSTRACT section heading, as follows: The aim of the invention is to optimize the analysis of substances separated by gas chromatography with a gas chromatograph, comprising a separating device and a mass spectrometer situated down there from. To this end, a detector that detects the separated substances in a nondestructive manner is placed in-line between the output of the separating device and a controllable inlet valve of the mass spectrometer. An evaluating device situated down from the detector evaluates the detector signals and, based on the evaluation, controls the inlet valve for introducing predeterminable substances into the mass spectrometer.

The invention provides a high-power slab green laser. The high-power slab green laser includes a pump source, a focusing system, a laser resonator and a self-frequency doubling crystal. The self-frequency doubling crystal is a neodymium ion doped calcium borate rare earth salt crystal cut into a slab shape along a direction of a maximum non-principal effective nonlinear coefficient of the crystal.Phase matching of different wavelengths is realized by changing a tangential direction of the crystal so as to realize laser output in 545 nm or 550 nm band. The pump source is a laser diode array having an emission center wavelength of 808 nm or 880 nm. An input cavity mirror and an output cavity mirror are coated with suitable film systems so as to obtain high-power laser output in the 545 nm or 550 nm band. The laser of the invention has the advantages of low laser threshold, high conversion efficiency and output power, and simple laser structure.

Concepts of the present disclosure may be employed to optimize optical pumping and ensure high modal gain in the active region of an optically pumped laser source by establishing an optical coupling gap such that the pump waveguide mode field overlaps the active gain region associated with the signal waveguide. The optical coupling gap is tailored to be sufficiently large to ensure that a significant active gain region length is required for absorption and sufficiently small to ensure that the pump waveguide mode field P overlaps the active gain region. In accordance with one embodiment of the present disclosure, the pump waveguide core is displaced from the signal waveguide core by an optical coupling gap g in a lateral direction that is approximately perpendicular to the optical pumping axis. A decayed intensity portion of the pump waveguide mode field extends into the active gain region to optically pump the active gain region and form an optical signal propagating along the longitudinal optical signal axis of the signal waveguide core.

The invention, which belongs to the technical field of optical parametric oscillator, provides a double-end-surface pumping optical parametric oscillator comprising a laser pumping source and the like. The optical parametric oscillator is characterized in that a beam splitter is arranged in rear of the laser pumping source and splits pump light into two light paths; the two paths of light beams are transmitted into a resonant cavity through respective light paths front the front side and the rear side of the resonant cavity, thereby forming a double-end-surface pumping optical parametric oscillator. Generated parametric light is outputted from a light resonant cavity of an output terminal. According to the invention, with the dual-end pumping way, a problem that the laser pump power is limited due to a low crystal destruction threshold during the single-end pump process can be solved; and the heat effect of the optical parametric oscillator can be reduced. Moreover, on the basis of the reasonable design of the resonant cavity, the good cavity model matching is realized, thereby obtaining the high-power high-light-beam-quality optical parametric laser output.

The invention discloses a large-power 1064 nm near-infrared laser based on a wattle structure. The large-power 1064 nm near-infrared laser based on the wattle structure is characterized in that the large-power 1064 nm near-infrared laser based on the wattle structure comprises a laser crystal, optical lenses placed on both sides of the laser crystal and a semiconductor laser pumping module, a laser resonant cavity forming pump lights into 1064 nm lasers with high beam quality and a modulating component modulating the lasers, wherein the laser crystal is a wafer with the wattle structure, an optical direction of the pump lights is in the wafer, a M-shaped light path is formed by the lasers in the laser. The large-power 1064 nm near-infrared laser based on the wattle structure has the advantages that the first-order hot focus, the stress birefringence and the depolarization effect can be lightened even eliminated through the reasonable M-shaped light path designed and the curvature radius of the cylindrical mirror chosen appropriately, thus the simple wattle laser structure is used so as to obtain better light bean quality and higher output power. A diaphragm is arranged inside the laser resonant cavity and can further improve the light beam quality.