High-energy hundreds of picoseconds laser device based on stimulated Brillouin scattering pulse compression

A technology of stimulated Brillouin and picosecond lasers, applied in the field of lasers, can solve the problem that lasers cannot achieve narrow pulse high-energy single longitudinal mode output, and achieve the effect of improving efficiency

Inactive Publication Date: 2015-07-29
哈尔滨镭致科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that existing lasers cannot realize narrow pulse high-energy single longitud

Method used

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  • High-energy hundreds of picoseconds laser device based on stimulated Brillouin scattering pulse compression
  • High-energy hundreds of picoseconds laser device based on stimulated Brillouin scattering pulse compression

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specific Embodiment approach 1

[0016] Specific implementation mode one: the following combination figure 1 Describe this embodiment, the high-energy hundreds of picosecond laser device based on stimulated Brillouin scattering pulse width compression in this embodiment, it includes an oscillator 1, a beam expander telescope 2, a No. 1 polarizer 3, and a Faraday isolator 4. 45° rotor 5, No. 2 polarizer 6, No. 1 laser amplifier 7, 90° rotor 8, No. 2 laser amplifier 9, 1 / 4 wave plate 10, No. 1 plane mirror 11, No. 2 plane mirror 12 and a stimulated Brillouin scattering generating unit 13;

[0017] The No. 1 polarizer 3, the Faraday isolator 4, the 45° rotor 5 and the No. 2 polarizer 6 are sequentially arranged along the optical axis to form an optical isolation system;

[0018] The p-polarized light generated by the oscillator 1 passes through the beam expander telescope 2, and then transmits through the optical isolation system. The transmitted p-polarized light is first amplified by the No. 1 laser amplifier...

specific Embodiment approach 2

[0021] Specific implementation mode two: the following combination figure 2 Describe this embodiment, this embodiment will further explain Embodiment 1, the stimulated Brillouin scattering generating unit 13 adopts a single cell structure, and the stimulated Brillouin scattering generating unit 13 is composed of a convex lens and a Brillouin medium cell, and the incident light passes through The convex lens focuses the incident light into the Brillouin medium pool, and stimulated Brillouin scattering occurs in the Brillouin medium pool near the focal point of the convex lens, and returns back to the original path of the Stokes light. Such as figure 2 (a) shown.

[0022] The length of the Brillouin medium pool is selected from 50cm to 120cm, and the focal length of the convex lens is 20cm to 100cm. The inner diameter of the Brillouin medium pool is selected from 20 mm to 50 mm, the refractive index of the Brillouin medium of the liquid inside the Brillouin medium pool is se...

specific Embodiment approach 3

[0024] Specific implementation mode three: the following combination figure 2 Describe this embodiment. This embodiment will further explain Embodiment 1. The stimulated Brillouin scattering generating unit 13 adopts a compact double-cell structure, and the stimulated Brillouin scattering generating unit 13 is composed of a convex lens and two Brillouin dielectric cells. , one of the two Brillouin medium cells is the amplification cell, and the other is the generation cell. The incident light passes through the amplification cell and is focused by the convex lens to the generation cell. Stimulated Brillouin scattering occurs in the generation cell and near the focal point of the convex lens. The back-to-Stokes light is amplified by the amplification cell and returns along the original path. Such as figure 2 (b) shown.

[0025] The length of the Brillouin medium pool is selected from 50cm to 120cm, and the focal length of the convex lens is 20cm to 100cm. The inner diamete...

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Abstract

The invention discloses a high-energy hundreds of picoseconds laser device based on stimulated Brillouin scattering pulse compression, and belongs to the field of optical instruments, so as to solve the problem that the prior laser can not realize narrow pulse high energy single longitudinal mode output. According to the scheme of the invention, after p polarized light generated by an oscillator passes through a beam expanding telescope, the light transmits a light isolation system, the transmitted p polarized light is amplified and changes into s polarized light via a 90-DEG rotor, the s polarized light is further amplified and then converted into circular polarized light via a 1/4 wave plate, continuous reflection via two plane mirrors is sequentially carried out, a direction is changed, the light then enters a stimulated Brillouin scattering generation unit, and stimulated Brillouin scattering is generated. Generated back Stokes light is returned along the original path, continuous reflection via two plane mirrors is sequentially carried out, a direction is changed, the light is converted into p polarized light via a 1/4 wave plate, the p polarized light is amplified and then converted into s polarized light via a 90-DEG rotor, and the s polarized light is further amplified and separated by a second polarized film and reflected out of the light path.

Description

technical field [0001] The invention relates to a laser based on stimulated Brillouin scattering (SBS) pulse width compression, and belongs to the field of optical instruments. Background technique [0002] In many industrial and scientific research applications, such as high-precision laser ranging radar, laser freckle removal beauty, laser marking, laser processing, etc., the laser pulse is required to have the narrowest possible laser pulse width (hundreds of picoseconds), high A series of harsh conditions such as pulse energy (hundreds of millijoules to joules), repetition frequency (>10Hz), high peak power, and single longitudinal mode. At present, there are mainly two types of pulsed lasers widely used, one is mode-locked lasers, the output laser pulse width of this type of laser is femtosecond or ultrashort pulse less than tens of picoseconds, and its characteristic is that the single pulse energy is very low, Only on the order of millijoules, the linewidth of the...

Claims

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Application Information

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IPC IPC(8): H01S3/30H01S3/10
Inventor 吕志伟王雨雷
Owner 哈尔滨镭致科技有限公司
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