Method and device for acquiring stimulated Brillouin scattering light with high-fidelity pulse waveforms

A technology of stimulated Brillouin and pulse waveform, which is applied in the direction of laser scattering effect, optical waveguide, optical, etc., can solve the problems of steepening front of SBS pulse waveform, complex device structure, narrowing pulse width, etc., and achieve SBS Pulse waveform controllable, huge application potential, simple device effect

Inactive Publication Date: 2011-11-02
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the leading edge of the SBS pulse waveform generated by the existing Brillouin scattered light generating device becomes steeper, the pulse width is narrowed and the fidelity is poor due to modulation, and the structure of the existing improved device is complicated, and a new device is provided. A method and device for obtaining stimulated Brillouin scattered light with high fidelity pulse waveform

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  • Method and device for acquiring stimulated Brillouin scattering light with high-fidelity pulse waveforms
  • Method and device for acquiring stimulated Brillouin scattering light with high-fidelity pulse waveforms
  • Method and device for acquiring stimulated Brillouin scattering light with high-fidelity pulse waveforms

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specific Embodiment approach 1

[0021] Specific implementation mode one: the following combination figure 1 Describe this embodiment, a method for obtaining stimulated Brillouin scattered light with a high-fidelity pulse waveform described in this embodiment, the method is: the P-polarized pump laser light emitted by the laser 1 passes through a 1 / 2 wave plate 2 After transmission, the polarized pump light with P polarization component and S polarization component is output, and the polarized pump light of the P polarization component is transmitted through the polarizer 5 and the 1 / 4 wave plate 6 in sequence and then output to the left-handed circularly polarized pump pump light, the left-handed circularly polarized pump light enters the liquid core fiber 8 through the coupling lens 7, and the liquid core fiber 8 outputs stimulated Brillouin scattered light;

[0022] The length of the liquid core optical fiber 8 is selected between 0.8m and 2m, the inner diameter is selected between 50 μm and 500 μm, the re...

specific Embodiment approach 2

[0025] Specific implementation mode two: the following combination Figure 1 to Figure 6 This embodiment is described. This embodiment is a device for realizing a method for obtaining stimulated Brillouin scattered light with a high-fidelity pulse waveform described in Embodiment 1. It includes a laser 1, a 1 / 2 wave plate 2, a polarizer plate 5, 1 / 4 wave plate 6, coupling lens 7 and liquid core fiber 8,

[0026] A 1 / 2 wave plate 2, a polarizer 5, a 1 / 4 wave plate 6 and a coupling lens 7 are sequentially arranged on the optical axis of the P polarization state pump laser light emitted by the laser 1, and the 1 / 2 wave plate 2 is connected to the optical axis The included angle is θ, the polarizer 5 and the optical axis are placed at a Brewster angle, the 1 / 4 wave plate 6 is perpendicular to the optical axis, and the coupling lens 7 is perpendicular to the optical axis,

[0027] The P-polarized pump laser light emitted by the laser 1 is incident on the 1 / 2 wave plate 2, and the ...

specific Embodiment approach 3

[0030] Specific embodiment three: this embodiment further explains embodiment two, the device for obtaining stimulated Brillouin scattered light with a high-fidelity pulse waveform also includes a photodetector 3, and the stimulated output of the liquid core optical fiber 8 The Brillouin scattered light is right-handed circularly polarized light, and the right-handed circularly polarized light returns along the original path, and after being transmitted through the coupling lens 7, it is incident on the 1 / 4 wave plate 6, and the 1 / 4 wave plate 6 converts the incident All the right-handed circular vibration light is converted into S-polarized light beams, which are reflected by the polarizer 5 and output to the photodetector 3, and the photodetector 3 is used to detect the SBS pulse waveform output by the system.

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Abstract

The invention discloses a method and a device for acquiring stimulated Brillouin scattering light with high-fidelity pulse waveforms, and belongs to the field of optics. The method and the device aim to solve the problems of low fidelity caused by the front edge steepening, pulse width narrowing and modulation of stimulated Brillouin scattering (SBS) pulse waveforms generated by a conventional Brillouin scattering light generation device and the structural complexity of a conventional improved device. In the method and the device, after P polarized pumped laser emitted by a laser is transmitted by a 1 / 2 wave plate, polarized pumped light with a P polarized component and an S polarized component is output; after the polarized pumped light of the P polarized component is transmitted sequentially by a polarizing film and a 1 / 4 wave plate, left circularly polarized pumped light is output and enters a liquid-core optical fiber by a coupling lens, and the stimulated Brillouin scattering light which is right circularly polarized light is output by the liquid-core optical fiber; and the right circularly polarized light is backtracked and completely converted into S polarized beams by the 1 / 4 wave plate.

Description

technical field [0001] The invention relates to a method and a device for obtaining stimulated Brillouin scattered light with a high-fidelity pulse waveform, belonging to the field of optics. Background technique [0002] Stimulated Brillouin scattering (SBS) is the simplest and most convenient way to generate phase conjugated light, and it has broad application prospects in improving the quality of laser beams, laser nuclear fusion, and laser pulse compression. However, applications such as laser fusion require both phase-conjugated light and the same pulse shape as the pump light. However, in the existing SBS generation device, on the one hand, the threshold effect of SBS will change the pulse leading edge; on the other hand, the amplification of SBS will evacuate the pump pulse trailing edge, making the whole pulse compressed. Although the SBS pulse width increases and the pulse compression is relieved with the increase of pump energy, the SBS pulse waveform generated by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/30G02F1/365G02B6/02
Inventor 高玮孙頔毕雅凤李健一曹桂源李恩涛
Owner HARBIN UNIV OF SCI & TECH
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