Method of different medium of mixed medium selected by double-pond excited Brillouin scattering system

A technology of stimulated Brillouin and mixed media, applied in the field of nonlinear optics, can solve the problems of large energy loss, reducing the intensity of pumping light, reducing the intensity of seed light, etc.

Inactive Publication Date: 2005-03-30
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the same medium is used in the oscillation cell and the amplification cell, it will be limited by the absorption coefficient, gain coefficient, phonon lifetime and optical breakdown threshold of the medium.
First of all, the absorption coefficient of most media is relatively large, so the energy loss in a longer amplification cell is too large; secondly, although some media have a small absorption coefficient, the optical breakdown threshold is relatively low, so when the pumping light is re

Method used

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  • Method of different medium of mixed medium selected by double-pond excited Brillouin scattering system
  • Method of different medium of mixed medium selected by double-pond excited Brillouin scattering system
  • Method of different medium of mixed medium selected by double-pond excited Brillouin scattering system

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Example Embodiment

Embodiment 1: This embodiment is described with reference to FIG. 1 and FIG. 2. This embodiment consists of a laser 1, a polarizer 2, a quarter wave plate 3, a first convex lens 4, a magnifying cell 5, a second convex lens 6, and an oscillation cell. 7 Composition; the laser output from laser 1 is input to the input end of polarizer 2, then transmitted through polarizer 2, and output from the output end of polarizer 2 to the input end of 1 / 4 wave plate 3, and then passed through 1 / 4 wave plate 3. The transmitted laser light is output from the output end of the 1 / 4 wave plate 3 to the input end of the first convex lens 4, and the laser light transmitted through the first convex lens 4 is output from the output end of the first convex lens 4 to the input end of the magnifying cell 5, The laser light transmitted through the magnifying cell 5 is output from the output end of the magnifying cell 5 to the input end of the second convex lens 6, and the laser light transmitted through t...

Example Embodiment

Specific embodiment 2: This embodiment is described with reference to FIG. 1 and FIG. 2. On the basis of specific embodiment 1, this embodiment uses a mixed medium for the liquid medium in the amplification tank 5 and the oscillation tank 7. The amplification tank 5 and the oscillation tank use a mixed medium. The type and volume ratio of the mixed medium in 7 are selected according to the following formula:

0 g = g e ( max ) 1 1 + ( 2 Δv / Γ ) 2

In the above formula, v is the Brillouin frequency shift value of the mixed medium in the amplification cell 5 and the oscillation cell 7, λ is the wavelength of the incident light, n 1 and n 2 is the refractive index of the two monomers; ρ...

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Abstract

The invention relates to a method for selecting different medium or mixed medium for double-pod stimulated Brillouin scattering system. Said invention relates to non-linear optical field. The laser outputted from laser can be passed throught the polaroid, 1/4 wave plate, first convex lens, amplifying pool and second convex lens, and outputted into the input end of oscillating pool, then the seed light can be returned along the original way, and inputted on the polaroid and refracted out by it. Said invention also provides a formula for selecting medium varity in the amplifying pool and oscillating pool. Said invention can effectively raise loading capacity of said system, energy conversion efficiency, phase conjugated fidelity and stability.

Description

Technical field: The invention relates to the field of nonlinear optics, in particular to a method for selecting different media or mixed media for a double-cell stimulated Brillouin scattering system. Background technique: Because stimulated Brillouin scattering (SBS) has the characteristic of phase conjugation, it can eliminate the phase distortion in the process of light transmission and improve the beam quality. Therefore, the theory of SBS phase conjugation and its experiments have been widely studied for many years. SBS phase-conjugate mirrors are available in various configurations, such as focusing single-cell, double-cell system, compact double-cell system, and independent double-cell system, etc. Except for the focusing single cell, all other structures belong to the vibration-amplification double cell system, which consists of two parts: the oscillation cell and the amplification cell. The Stokes seed light generated in the oscillation cell enters the amplificat...

Claims

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Application Information

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IPC IPC(8): G02B5/30G02F1/35G02F1/39H01S3/00
Inventor 吕志伟哈斯乌力吉何伟明林殿阳
Owner HARBIN INST OF TECH
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