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Two-crystal compound gain inner cavity Raman yellow light laser

A compound gain and laser technology, applied in lasers, laser components, phonon exciters, etc., can solve problems such as serious thermal effects, affecting laser emission and SRS conversion efficiency, crystal cracking, etc., to improve beam quality and conversion efficiency , to ensure the effect of polarization

Pending Publication Date: 2017-05-17
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in a self-Raman laser, the heat generated by the two processes of laser emission and SRS is accumulated in the same crystal, and the thermal effect is more serious, affecting the conversion efficiency of laser emission and SRS, and even causing crystal rupture in severe cases

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  • Two-crystal compound gain inner cavity Raman yellow light laser

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Embodiment 1

[0024] An embodiment of the present invention provides an intracavity Raman yellow laser with dual-crystal compound gain, see figure 1 , in the implementation of the present invention, except that Nd:YAG crystal 5 is used as the laser gain medium, the Nd:YVO as the Raman gain medium 4 Crystal 6 also provides partial gain to the 1.06 μm laser at the same time, so that the fundamental frequency light and Stokes light have linear polarization characteristics. The design principle of the Raman yellow laser is as follows:

[0025] The laser diode pump source emits pump light, which is respectively coaxially placed by Nd:YAG crystal 5 and Nd:YVO 4 Each crystal 6 absorbs a part, and the two crystals provide laser gain at the same time. Since the Nd:YAG crystal 5 has the same gain in the two polarization directions, and the Nd:YVO 4 The gain of crystal 6 in the π-polarization direction is much greater than that in the σ-polarization direction, so the overall gain of the π-polarized l...

Embodiment 2

[0029] Combine below figure 1 , to further introduce the scheme in Example 1, see figure 1 , the intracavity Raman yellow light laser with double crystal compound gain includes: laser diode pump source 1, energy transmission fiber 2, coupling lens group 3, total reflection mirror 4, Nd:YAG crystal 5, Nd:YVO 4 Crystal 6, frequency doubling crystal 9, yellow light output mirror 10, wherein,

[0030] Coupling lens group 3 is coated with 808nm antireflection coating; total reflection mirror 4 is coated with 808nm antireflection, 1064nm and 1176nm high reflection coating; Nd:YAG crystal 5 and Nd:YVO 4 Crystal 6 is coated with 808nm, 1064nm, 1176nm anti-reflection coating; frequency doubling crystal 9 is coated with 1064nm, 1176nm anti-reflection coating; yellow light output mirror 10 is coated with 1064nm, 1176nm high reflection, 588nm anti-reflection coating;

[0031] The laser diode pumping source 1 emits 808nm pumping light, which is output through the energy transmission fibe...

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Abstract

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.

Description

technical field [0001] The invention relates to the field of Raman lasers in the field of laser technology, in particular to an intracavity Raman yellow laser with double crystal compound gain. Background technique [0002] The intracavity frequency-doubled Raman laser is an important technical way to obtain yellow light output, that is, through stimulated Raman scattering (SRS), the highly efficient 1.06 μm laser of the Nd-doped laser working medium is converted into 1.18 μm first-order Stokes light, Then frequency doubling is performed to produce yellow light output near the wavelength of 588nm. [0003] Early intracavity frequency-doubled Raman lasers mostly used Nd-doped yttrium-aluminum garnet (Nd:YAG) as the laser gain medium. Since the laser light generated by it is non-polarized light, the first-order Stokes light is also non-polarizable, and the internal The cavity frequency doubling process needs to use potassium titanyl phosphate (KTP) and other crystals to achie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/06H01S3/108H01S3/115H01S3/0941H01S3/109
CPCH01S3/0602H01S3/0941H01S3/1086H01S3/109H01S3/115
Inventor 盛泉刘璐丁欣孙冰刘简姜鹏波董程姚建铨
Owner TIANJIN UNIV
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