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Systems and Methods for Suppressing Stimulated Brillouin Scattering Effects in High Power, Narrow Linewidth Fiber Laser Amplifiers

A technology of stimulated Brillouin and fiber laser, applied in the direction of laser scattering effect, laser, laser components, etc., to achieve the effect of suppressing stimulated Brillouin scattering effect, high power, and convenient spectral line width control characteristics

Active Publication Date: 2021-05-07
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

At present, the stimulated Brillouin scattering effect is one of the core factors limiting its power improvement

Method used

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  • Systems and Methods for Suppressing Stimulated Brillouin Scattering Effects in High Power, Narrow Linewidth Fiber Laser Amplifiers
  • Systems and Methods for Suppressing Stimulated Brillouin Scattering Effects in High Power, Narrow Linewidth Fiber Laser Amplifiers
  • Systems and Methods for Suppressing Stimulated Brillouin Scattering Effects in High Power, Narrow Linewidth Fiber Laser Amplifiers

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Embodiment 1

[0038] as attached figure 1 As shown, this embodiment provides a system for suppressing the stimulated Brillouin scattering effect in a high-power, narrow-linewidth fiber laser amplifier, including: a single-frequency laser 1, a phase modulation system 2, a cascaded fiber pre-amplifier 3, an optical fiber Main amplifier 4, cladding optical filter 5, fiber end cap 6. Wherein, the phase modulation system 2 includes an industrial computer 2-1, an arbitrary waveform generator 2-2, an electrical high-voltage amplifier 2-3 and a phase modulator 2-4. The main fiber amplifier 4 includes a pump source 4-1, a pump-signal combiner 4-2, and a gain fiber 4-3.

[0039] The single-frequency laser output from the single-frequency laser 1 is first injected into the phase modulation system 2, and the output spectrum of the single-frequency fiber laser is properly broadened to achieve the purpose of suppressing the stimulated Brillouin scattering effect. The phase modulation system 2 includes ...

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Abstract

The present invention proposes a system and method for suppressing the stimulated Brillouin scattering effect in a high-power, narrow-linewidth fiber laser amplifier, and performs single-frequency laser output from a single-frequency laser in a high-power, narrow-linewidth fiber laser The phase modulation signal used for phase modulation is φ f (t), where φ f (t)=rem(φ(t) / 2π), to realize the broadening of the single-frequency laser spectrum, so as to achieve the purpose of suppressing the stimulated Brillouin scattering effect. Compared with the existing white noise signal modulation and pseudo-random phase code modulation, the present invention can achieve more efficient stimulated Brillouin scattering suppression, and provide a theoretical basis and basis for further power improvement of high-power, narrow-linewidth fiber laser systems. Technical Support.

Description

technical field [0001] The invention belongs to the field of fiber laser technology, and in particular relates to a system and method for suppressing the stimulated Brillouin scattering effect in a high-power, narrow-linewidth fiber laser amplifier. Background technique [0002] High-power, narrow-linewidth fiber laser has important applications in beam combining, laser frequency conversion, laser communication and other fields. At present, the stimulated Brillouin scattering effect is one of the core factors limiting its power improvement. As a typical nonlinear effect, stimulated Brillouin scattering occurs in the process of mutual coupling of signal light field, Stokes light field and acoustic wave field in optical fiber. [0003] For the stimulated Brillouin scattering effect, researchers at home and abroad have proposed a variety of suppression methods, mainly including the use of large-mode-field high-doped gain fibers, the application of temperature and stress gradie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/067H01S3/10H01S3/30
CPCH01S3/06754H01S3/10053H01S3/302
Inventor 马鹏飞来文昌黄龙王涛宋家鑫刘伟姜曼李灿粟荣涛吴坚马阎星周朴
Owner NAT UNIV OF DEFENSE TECH
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