Ge-codoped laser fibers for mitigating stimulated Brillouin scattering in high power fiber amplifiers

Xin Chen; Ming-Jun Li; Anping Liu

doi:10.1117/12.888050

19 January 2011 Ge-codoped laser fibers for mitigating stimulated Brillouin scattering in high power fiber amplifiers

Xin Chen, Ming-Jun Li, Anping Liu

Proceedings Volume 7986, Passive Components and Fiber-Based Devices VII; 79860B (2011) https://doi.org/10.1117/12.888050
Event: Asia Communications and Photonics Conference and Exhibition, 2010, Shanghai, Shanghai, China

Abstract

Rare-earth doped fibers for high power fiber amplifiers normally have a small refractive index difference between the core and inner cladding, but have a larger core diameter than conventional telecom fibers. We take advantage of this feature as well as the difference between the optical and acoustic waveguides and proposed several fiber designs to mitigate Stimulated Brillouin Scattering (SBS) to produce higher output powers. The numerical modeling showed that an increase in SBS threshold by 3-5 dB can be achieved using Ge-codopant while maintaining diffraction limited beam quality. The study also highlights the need to take into account the effects of minor refractive index profile variation in evaluating SBS performance.

Citation Download Citation

Xin Chen, Ming-Jun Li, and Anping Liu "Ge-codoped laser fibers for mitigating stimulated Brillouin scattering in high power fiber amplifiers", Proc. SPIE 7986, Passive Components and Fiber-Based Devices VII, 79860B (19 January 2011); https://doi.org/10.1117/12.888050

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