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Device and method of evaluating time domain stability of high-power optical fiber laser system

A technology of fiber laser and fiber laser, applied in the field of strong laser, can solve the problems of limited bandwidth and high system cost

Pending Publication Date: 2018-10-23
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0006] Aiming at the defects in the prior art, the present invention provides a device and method for evaluating the time-domain stability of a high-power fiber laser system. The provided device evaluates the time-domain stability of a high-power fiber laser system based on a purely optical detection method The device can avoid the problems of limited bandwidth and high system cost in the traditional photoelectric detection method

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  • Device and method of evaluating time domain stability of high-power optical fiber laser system
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  • Device and method of evaluating time domain stability of high-power optical fiber laser system

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[0055] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

[0056] refer to figure 1 , a device for evaluating the time-domain stability of a high-power fiber laser system, including a high-power fiber laser system to be tested 1, a wavelength tunable ultra-low noise fiber laser 2, a wavelength division multiplexer 3, an energy transmission fiber 4, a collimator device 5, bandpass filter 6, power meter 7, waste light collector 8.

[0057] The central wavelength of the output laser of the high-power fiber laser system 1 to be tested is λ 1 , the central wavelength of the output laser of the wavelength tunable ultra-low noise fiber laser 2 is λ 2 , the corresponding Raman-Stokes frequency shift of energy-transmitting fiber 4 is Δλ R , where the wavelength tunable ultra-low noise fiber laser 2 has its output...

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Abstract

The invention provides a device and a method of evaluating time domain stability of a high-power optical fiber laser system. The device comprises a to-be-detected high-power optical fiber laser system, a wavelength-tunable ultralow noise optical fiber laser, a wavelength division multiplexer, an energy transfer optical fiber, a collimator, a bandpass filter, a power meter and a waste light collector. Through analyzing the dependency relationship between the conversion efficiency of Raman amplification laser with the central wavelength of lambda2 and the time domain stability of pumping laser with the central wavelength of lambda1 and through measuring the output power of Raman amplification signal light, the Raman conversion efficiency is further calculated and then compared with the Ramanamplification light power and the conversion efficiency which are calculated and obtained in a no-time domain undulation ideal condition, and thus, the time domain stability of the to-be-detected high-power optical fiber laser system can be evaluated. The time domain stability of the high-power optical fiber laser system can be evaluated based on a pure optical detection method, and problems suchas limited bandwidth and high system cost existing in the traditional photoelectric detection method can be avoided.

Description

technical field [0001] The invention belongs to the technical field of high-power lasers, and in particular relates to a device and method for evaluating the time-domain stability of a high-power fiber laser system based on a purely optical detection method. Background technique [0002] Exploring the time-domain stability of high-power fiber laser systems has important scientific significance and engineering value for the fields of fiber optic sensing, fiber optic communication, gravitational wave detection, nonlinear fiber optics, and high-power fiber laser systems. [0003] Specifically, in the fields of fiber optic sensing, fiber optic communication, and gravitational wave detection, the time domain stability of fiber laser systems directly determines the accuracy and sensitivity of sensing, communication, and detection. In the field of nonlinear fiber optics applications, the time-domain stability of fiber laser systems directly determines the dynamic characteristics of...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/00
CPCG01M11/00
Inventor 马鹏飞周朴苗宇刘伟肖虎张汉伟马阎星粟荣涛王小林冷进勇刘泽金
Owner NAT UNIV OF DEFENSE TECH
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