19 August 2011 Experimental study of SBS suppression with phase-modulation in all-fiber amplifier
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A cascaded all-fiber amplifier was set up to investigate stimulated Brillouin scattering (SBS) suppression with phase-modulation (PM) in our experiment. With a modulation index of π / 2 , the SBS threshold power of the modulated amplifier can be enhanced with a factor of 3.5 compared with the unmodulated single frequency amplifier. In high power level, we demonstrate a 275 W all-fiber amplifier, where the SBS threshold enhancement factor is larger than 2.2 compared with the unmodulated case with SBS threshold power of 126 W. Further enhancing the output power is limited by available gain fiber and pump powers in this case.
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Wenbo Du, Wenbo Du, Pu Zhou, Pu Zhou, Yanxing Ma, Yanxing Ma, Xiaolin Wang, Xiaolin Wang, Jiajan Zhu, Jiajan Zhu, Xiaolin Dong, Xiaolin Dong, Xiaojun Xu, Xiaojun Xu, Bohong Shu, Bohong Shu, } "Experimental study of SBS suppression with phase-modulation in all-fiber amplifier", Proc. SPIE 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging, 81921C (19 August 2011); doi: 10.1117/12.899872; https://doi.org/10.1117/12.899872

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