Large power fiber laser with inner cavity frequency doubling

A fiber laser and fiber laser technology, applied in the direction of lasers, laser components, phonon exciters, etc., can solve the problems of low output power and low frequency conversion efficiency of visible light, so as to improve conversion efficiency, increase output power, and stabilize The effect of doubling the output

Inactive Publication Date: 2016-05-18
INNO LASER TECH CORP LTD
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Problems solved by technology

It is used to solve the technical problems of low frequency doubling con

Method used

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  • Large power fiber laser with inner cavity frequency doubling
  • Large power fiber laser with inner cavity frequency doubling

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[0027] Please refer to the attached figure 1 , which is the first embodiment of a high-power intracavity frequency-doubling fiber laser, in which it includes: a fiber laser resonator and an intracavity frequency doubling system.

[0028] The fiber laser resonator includes: a fiber laser high-power pump source 5, a collimator lens 4 is arranged in front of the high-power pump source 5, and a two-color laser placed in a 45° direction is arranged in front of the collimator lens 4. mirror 3, the front of the dichroic mirror 3 and the collimating lens 4 in the vertical direction are provided with a collimating lens 6, a large mode field double-clad polarization-maintaining doped rare earth fiber 7 and a beam expander lens 8, and the described dichroic mirror 3 and A narrow line width filter 2 and a total reflection mirror 1 are also provided behind the collimator lens 4 in the vertical direction.

[0029] Wherein, the high-power pumping source 5 is composed of n multimode semicond...

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Abstract

The invention discloses a large power fiber laser with inner cavity frequency doubling, comprising a fiber laser resonant cavity and an inner cavity double-frequency system, wherein the fiber laser resonant cavity comprises at least one pair of cavity mirrors to form the resonant cavity; the resonant cavity is provided with at least one group of high power pump light sources, at least one fiber combiner which couples the pump light into active fiber to form population inversion, at least one signal wavelength selector, and at least one section of large mode field double-cladding polarization-maintaining rare earth doped fiber; the inner cavity double-frequency system comprises at least one frequency doubling crystal, at least one reflector, and at least one dichroic mirror, wherein a laser beam passes through the frequency doubling crystal and is output by the dichroic mirror. According to the inner cavity frequency doubling large power fiber laser, double-cladding large mode field fiber is adopted to increase the output power of near infrared fiber laser; by means of inner cavity frequency doubling, the conversion efficiency of double-frequency is substantially increased; by means of the polarization maintaining fiber, the fiber near infrared laser output polarization direction is made to be consistent with that of the frequency doubling crystal and stable double-frequency output is obtained.

Description

technical field [0001] The invention relates to the technical field of fiber lasers, in particular to an intracavity frequency-multiplied high-power fiber laser. Background technique [0002] Fiber laser refers to a laser that uses rare earth-doped glass fiber as the gain medium. It has the advantages of good beam quality, simple structure, long life, and high conversion efficiency. Its main performance has been significantly better than traditional solid-state lasers, CO 2 Lasers, etc., have become the fastest growing new force in the industrial laser market. [0003] By doping different rare earth elements (such as ytterbium, erbium, and thulium), fiber lasers can achieve near-infrared laser output in different wavelength bands. In order to obtain visible light, it is usually necessary to perform frequency doubling by using nonlinear optical crystals. Like other nonlinear frequency conversion effects, the frequency conversion efficiency will be high only when the light i...

Claims

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Application Information

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IPC IPC(8): H01S3/067H01S3/109
CPCH01S3/06733H01S3/0675H01S3/109
Inventor 赵晓杰林德教何淳
Owner INNO LASER TECH CORP LTD
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