Fundamental frequency light seed injected narrow linewidth inner cavity Raman laser

A technology of Raman laser and narrow line width, which is applied in the field of lasers, can solve problems such as drop and affect the conversion efficiency of Raman lasers, and achieve the effect of avoiding insertion loss and improving conversion efficiency

Active Publication Date: 2017-10-13
中科纳迪(苏州)科技有限公司
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Problems solved by technology

[0008] The invention provides a narrow-linewidth intracavity Raman laser injected with fundamental-frequency optical seeds. The invention solves the problem of the effective Raman gain coefficient g caused by widening of th

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  • Fundamental frequency light seed injected narrow linewidth inner cavity Raman laser

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Example Embodiment

[0036] Example 1

[0037] In order to solve the adverse effects of the fundamental frequency light broadening in the existing intracavity Raman lasers on the effective Raman gain coefficient and stimulated Raman scattering efficiency, a high-efficiency narrow linewidth Stokes light output is obtained, and the inner cavity is improved Raman laser performance. The embodiment of the present invention provides a narrow linewidth intracavity Raman laser with fundamental frequency optical seed injection, see figure 1 , See the description below for details:

[0038] The laser gain medium absorbs the pump light and forms a population inversion to generate laser gain. Under the positive feedback action of the laser resonator composed of the resonator mirror, the resonator folding mirror and the output mirror, a 1064nm fundamental frequency laser oscillation is formed;

[0039] The fundamental frequency laser seed source emits 1064nm single-frequency seed light, which passes through the iso...

Example Embodiment

[0042] Example 2

[0043] Combine below figure 1 , A specific example further introduces the solution in embodiment 1, see the following description for details:

[0044] A narrow linewidth intracavity Raman laser with fundamental frequency light seed injection, including: pump source 1, energy transfer fiber 2, pump coupling lens group 3, resonator mirror 4, resonator folding mirror 5, laser gain Medium 6, Raman gain medium 7, output mirror 8, piezoelectric ceramic 9, beam splitter 10, fundamental frequency laser seed source 11, isolator 12, seed light coupling lens 13, photodetector 14, feedback control circuit 15,

[0045] Among them, the laser gain medium 6 selects a-axis cutting Nd:YVO 4 Crystal, whose fundamental frequency laser wavelength is 1064nm, corresponding to 890cm -1 The wavelength of the first-order Stokes light of the Raman spectrum is 1176nm, and the crystal size is 3×3×10mm 3 , The doping concentration is 0.3%, and the two ends are plated with 800-1200nm antirefl...

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Abstract

The invention discloses a fundamental frequency light seed injected narrow linewidth inner cavity Raman laser. A laser gain medium absorbs pumping light to form population inversion so as to generate laser gain, and thus 1064nm fundamental frequency laser oscillation formed under positive feedback effect of a laser resonant cavity composed of a resonant cavity reflecting mirror, a resonant cavity folded mirror and an output mirror; a fundamental frequency light seed source emits 1064nm single frequency seed light which enters the laser resonant cavity after passing through the isolator and being focused by a seed light coupling lens and reflected by a beam splitter; the single frequency seed light is effectively coupled into the laser resonant cavity to achieve seed injection; when 1064 fundamental frequency laser passes through a laser gain medium and a Raman gain medium, Raman gain is generated, when the Raman gain is larger than loss of the Stokes resonant cavity composed of the resonant cavity reflecting mirror, the resonant cavity folded mirror and the output mirror, stimulated Raman scattering occurs, and stable 1176nm Stokes light oscillation is formed in the Stokes resonant cavity.

Description

technical field [0001] The invention relates to the field of lasers, in particular to a narrow-linewidth intracavity Raman laser injected with fundamental-frequency light seeds. Background technique [0002] Stimulated Raman scattering (SRS) is one of the important nonlinear optical frequency conversion technologies. Raman lasers based on SRS have the characteristics of automatic phase matching and beam cleanup, and it is easy to obtain high beam quality The stable output is used in ultraviolet, visible light, near-infrared to mid-infrared light sources. In particular, intracavity Raman lasers, including self-Raman lasers, have the advantages of simple and compact structure and low cost. They are research hotspots in the field of laser technology in recent years and are widely used. [0003] The intracavity Raman laser in the prior art has the problem of broadening the fundamental frequency light spectrum and affecting the conversion efficiency of SRS under the high power o...

Claims

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Application Information

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IPC IPC(8): H01S3/30H01S3/16
CPCH01S3/1611H01S3/163H01S3/164H01S3/1673H01S3/30
Inventor 苏鑫盛泉崔新
Owner 中科纳迪(苏州)科技有限公司
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