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Optical fiber Brillouin laser for bi-directional dual wavelength lasing

A dual-wavelength, dual-directional technology, applied to lasers, laser components, phonon exciters, etc., can solve the problems of high wavelength stability of the pump light source, increased system cost, complex and huge system, etc., and achieve simple structure , low cost and stable performance

Active Publication Date: 2010-06-23
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The first two methods require additional mechanical devices or modulators and other additional equipment, making the entire system complex and bulky; the third method requires extremely high wavelength stability of the two pump light sources, which greatly increases the system cost

Method used

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  • Optical fiber Brillouin laser for bi-directional dual wavelength lasing
  • Optical fiber Brillouin laser for bi-directional dual wavelength lasing
  • Optical fiber Brillouin laser for bi-directional dual wavelength lasing

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Embodiment Construction

[0020] The core idea of ​​the present invention is: two sections of optical fibers with different Brillouin frequency shift characteristics are used to form a hybrid ring cavity, and pump light of the same wavelength is injected into the two directions of the hybrid ring cavity at the same time, so that the Brillouin produced by the two sections of fibers The Stokes waves are lased in two directions respectively, so as to realize the output of Brillouin laser with two directions and two wavelengths.

[0021] The fiber Brillouin laser with simultaneous lasing in two directions and two wavelengths proposed by the present invention is described as follows in conjunction with the accompanying drawings and embodiments.

[0022] Such as figure 2 As shown, the fiber Brillouin laser with two directions and two wavelengths simultaneously lasing of the present invention comprises: a first optical fiber 1, a lumped loss device 3, a second optical fiber 2, a coupling device 4, and the co...

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Abstract

The present invention relates to technical field of optical fiber sensing. The present invention provides a bi-directional dual wavelength simultaneous lasing brillouin fiber laser, wherein the laser comprises a first optical fiber 1, a lumped loss component 3, a second optical fiber 2 and a coupling device 4, wherein the coupling device 4 is provided with a first terminal port 5, a second terminal port 6, a third terminal port 7 and a fourth terminal port 8; all components constitute a mixed ring cavity; the two pieces of optical fiber are provided with different brillouin frequency excursion characteristic; two narrow line-width lasers with same wavelength are injected into the ring cavity by the first and second terminal port of the coupling device 4; two lasing brillouin Stokes waves are generated in clockwise and anti-clockwise direction respectively and output from the first and the second terminal port respectively so as to realize bi-directional lasing, and only one lasing wavelength in each lasing direction.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensing, in particular to an optical fiber Brillouin laser that is applied in optical fiber laser gyroscopes and optical fiber temperature and stress sensing in two directions and dual wavelengths simultaneously lasing. Background technique [0002] Stimulated Brillouin Scattering (SBS) is an optical nonlinear process. When the incident pump light power reaches the threshold of SBS, the pump wave generates acoustic waves through electrostriction, resulting in a change in the refractive index of the medium. The periodic modulation forms a refractive index grating, and the Bragg diffraction of the grating makes most of the input pump light power turn into backscattered Stokes wave power with reduced frequency. During this process, the pump wave, backscattered Stokes Stokes waves and sound waves satisfy the conditions of energy conservation and momentum conservation, so that the frequency shift...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/30H01S3/067H01S3/0941
Inventor 张巍黄俨冯雪黄翊东彭江得
Owner TSINGHUA UNIV
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