High-power side-pumping 1525nm (human-eye safe waveband) automatic self-raman laser

A Raman laser, side pumping technology, applied in the field of lasers, can solve the problems of low output power, poor beam quality, low conversion efficiency, etc., achieve high conversion efficiency, high power, and solve the effect of complex structure

Inactive Publication Date: 2015-09-09
TIANJIN UNIV
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Problems solved by technology

[0006] The present invention provides a high-power side-pumped 1525nm human eye-safe band self-Raman laser. For...

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  • High-power side-pumping 1525nm (human-eye safe waveband) automatic self-raman laser
  • High-power side-pumping 1525nm (human-eye safe waveband) automatic self-raman laser

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Embodiment Construction

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the implementation manners of the present invention will be further described in detail below.

[0021] Aiming at the problems existing in the background technology, the embodiment of the present invention proposes a side-pumped self-Raman laser structure, that is, a crystal rod with both laser gain characteristics and Raman activity is pumped through the side of the LD array, so as to obtain the required band Raman laser output. This design makes the cavity structure compact and the conversion efficiency is greatly improved, thus obtaining high-power laser output.

[0022] A high-power side-pumped 1525nm eye-safe self-Raman laser, see figure 1 , the laser includes: a laser, a Raman optical total reflection mirror 1, an acousto-optic Q-switched switch 2, a side pump head 3 and a Raman optical output mirror 4. see figure 2 , The side pump head 3 includes: an LD array 31 ...

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Abstract

The invention discloses a high-power side-pumping 1525nm (human-eye safe waveband) automatic self-raman laser, and a core part of the filter is a side pump head. The side pump head comprises an LD array and a laser crystal rod, wherein the LD array is used for the pumping of the laser crystal rod, and the laser crystal rod is used for laser transmission and stimulated raman scattering. The LD array and the laser crystal rod operate in a resonant cavity formed by laser, a raman total-reflection mirror, and a raman light output mirror, thereby achieving the fundamental frequency light vibration, and achieving the conversion from fundamental frequency light to raman light through an acousto-optic Q-switching under the action of the laser crystal rod, wherein the raman light output mirror outputs 1525nm laser. The laser solves problems that an end-face pumping solid laser is low in output power and is lower in practicality, and also solve a problem that a common side-pumping solid laser is complex in structure.

Description

technical field [0001] The invention relates to the field of lasers, in particular to a high-power side-pumped 1525nm eye-safe band self-Raman laser. Background technique [0002] Compared with lasers in other bands, 1.5μm band laser has a higher damage threshold for human eyes, so it is safe for human eyes; It has important applications in radar and other aspects. Using stimulated Raman scattering, a third-order nonlinear process, is an important method to generate lasers in the above-mentioned bands. [0003] So far, most of the reported solid-state Raman and self-Raman lasers around the 1.5 μm band use end-pumping technology. The advantages of solid-state Raman and self-Raman lasers using this pumping technology are low threshold and high conversion efficiency. , but due to the strong thermal lens effect in the working medium, it will greatly affect the stability of the laser. In addition, because this pumping method can only occur in the direction of the end face of t...

Claims

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Application Information

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IPC IPC(8): H01S3/30H01S3/16H01S3/117
Inventor 丁欣姜鹏波盛泉李斌孙冰刘简张巍赵岑姚建铨
Owner TIANJIN UNIV
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