Analysis of stimulated Raman scattering in cw kW fiber oscillators

被引：37
|
作者：
Schreiber, T. [1 ]
Liem, A. [1 ]
Freier, E. [1 ]
Matzdorf, C. [1 ]
Eberhardt, R. [1 ]
Jauregui, C. [2 ]
Limpert, J. [2 ]
Tuennermann, A. [1 ,2 ]
机构：
[1] Fraunhofer Inst Appl Opt & Precis Engn, Albert Einstein Str 7, D-07745 Jena, Germany
[2] Univ Jena, Inst Appl Phys, D-07745 Jena, Germany
来源：
FIBER LASERS XI: TECHNOLOGY, SYSTEMS, AND APPLICATIONS | 2014年 / 8961卷
关键词：
Fiber laser; High Power; Fiber Bragg Gratings; Nonlinear effects; Stimulated Raman Scattering; Self-Phase Modulation; Nonlinear Schrodinger Equation; SPECTRUM;
D O I：
10.1117/12.2039869
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper the threshold for Stimulated Raman scattering (SRS) is analyzed experimentally and theoretically for monolithic LMA cw kW fiber oscillators. Four oscillators with different spectral widths of the low reflecting (LR) Fiber Bragg Gratings (FBG) (0.04 nm, 0.5 nm, 1.5 nm (FWHM) and without LR grating) were characterized. Experimental it was found that the threshold of SRS depends on the spectral width of the out coupling FBGs, which is not yet understood completely. Attempts to describe such lasers by simulations are based on the nonlinear Schrodinger equation supporting spectral broadening of cw-fiber laser, rate equation gain as well as broadband Raman gain. The experimental results and the simulations were compared and discussed.
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页数：8
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