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Forward Brillouin fiber laser sensor based on stimulated Raman

A fiber laser and sensor technology, applied in the field of laser research, can solve the problems of adjustable temperature strain sensitivity, affecting the sensing accuracy and application range, etc., to improve design flexibility and achieve the effect of laser free spectral range

Active Publication Date: 2021-04-27
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0003] Searching in the existing literature found that domestic and foreign scholars (Opt. Lett.13, p.1094, 2001; Opt.lett.29, p.1485, 2004 published by Zou et al;) In the design, the back stimulated Brillouin scattering effect is used to realize the sensing of temperature and strain , but it is still limited in terms of adjustable temperature and strain sensitivity, which affects the sensing accuracy and application range

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  • Forward Brillouin fiber laser sensor based on stimulated Raman
  • Forward Brillouin fiber laser sensor based on stimulated Raman
  • Forward Brillouin fiber laser sensor based on stimulated Raman

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[0020] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] refer to figure 1 , the present invention provides a forward Brillouin fiber laser sensor based on stimulated Raman-like, comprising: a tunable single-frequency laser 1, an erbium-doped fiber amplifier 2, a polarization controller 3, a first optical coupler 4, Second optical coupler 5, single-mode optical fiber 6, temperature / strain control system 7, polarization beam combiner 8, third optical coupler 9, photodiode 10, spectrometer 11 and spectrometer 12; wherein temperature / strain control system 7 Including a first optical fiber fixing jig 7a, a second optical fiber fixing jig 7b, and a heater 7c;

[0022] The pumping light generated by the tunable single-frequency laser 1 is amplified by the erbium-doped fiber amplifier ...

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Abstract

The invention relates to an optical fiber laser sensor and particularly relates to a forward Brillouin optical fiber laser sensor based on stimulated Raman. The sensor comprises a tunable single-frequency laser, an erbium-doped optical fiber amplifier, a polarization controller, an optical coupler, a single-mode optical fiber, a temperature / strain control system, a polarization beam combiner, a photodiode, a frequency spectrograph and a spectrograph, wherein the temperature / strain control system is composed of an optical fiber fixing clamp and a heater. According to the sensor, the design is reasonable, the forward stimulated Raman Brillouin fiber laser is used, and temperature strain sensing with adjustable sensitivity is realized by detecting the stimulated Raman scattering R0m Brillouin mode frequency shift amount.

Description

technical field [0001] The invention belongs to the field of laser research, in particular to a forward Brillouin fiber laser sensor based on stimulated Raman. Background technique [0002] Since the first observation of stimulated Brillouin scattering in 1964, SBS, as a typical nonlinear optical effect in optical fiber, has a wide range of applications. Using Brillouin fiber laser for sensing can realize long-distance real-time measurement and monitoring, no radiation interference, electrical insulation and anti-electromagnetic interference due to strict Brillouin frequency shift, narrow linewidth, and easy compatibility with other optical fiber components. Well, the measurement range is wide, with high spatial resolution and high precision, and it is mainly used in temperature or strain sensing. [0003] Searching in the existing literature found that domestic and foreign scholars (Opt. Lett.13, p.1094, 2001; Opt.lett.29, p.1485, 2004 published by Zou et al;) In the desi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/02H01S3/067H01S3/108
CPCG01D21/02H01S3/06754H01S3/1086
Inventor 刘毅宁钰商瑶陈鹏飞顾源琦
Owner TAIYUAN UNIV OF TECH
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