Experimental study of Raman amplification on stimulated Brillouin scattering in the G652 fibers at 1520nm

Zaixuan Zhang; Bizhi Dai; Laixiao Li; Haifeng Xu; Dan Geng; Honglina Liu; Jianafeng Wang; Chenxia Li; Tiao Liu; Insoo S. Kim

doi:10.1117/12.668393

20 January 2006 Experimental study of Raman amplification on stimulated Brillouin scattering in the G652 fibers at 1520nm

Zaixuan Zhang, Bizhi Dai, Laixiao Li, Haifeng Xu, Dan Geng, Honglina Liu, Jianafeng Wang, Chenxia Li, Tiao Liu, Insoo S. Kim

Author Affiliations +

Proceedings Volume 6027, ICO20: Optical Information Processing; 602742 (2006) https://doi.org/10.1117/12.668393
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China

Abstract

The forward and backward cascaded stimulated Brillouin scattering(SBS) in the backward pumped S band distributed G652 fiber Raman amplifier have been researched, pumped by the tunable power at 1428nm fiber Raman laser and signal source is a tunable power external cavity laser (ECL) with narrow spectral bandwidth (<100MHz). The threshold power of backward Stokes the first and second stimulated Brillouin scattering SB₁^- and SB₂^- in the backward pumped S band distributed fiber Raman amplifier is 5mW and 67.6mW, respectively. The Stokes stimulated Brillouin scattering lines is amplified by fiber Raman amplifier and fiber Brillouin amplifier. The total G_A is production of the gain of Raman G_R and the gain of Brillouin amplifier G_B. G_A=G_R×G_B. In experimental work, the saturation gain of SB₁^- and SB₂^- is about 50dB and 65dB respectively and the saturation gain of 25km G652 backward FRA is about 25dB, so the gain of backward fiber Brillouin amplifier SB₁^- and SB₂^- are about 25dB and 40dB, respectively. The forward SBS does not obey the common theory that only weakening backward-SBS lines existed, according to conservation of energy and momentum and wave vector selected rule. Because the wave-guide characters weaken the wave vector rule, but the forward transmit sound wave-guide forward Brillouin scattering lines are generated and amplified in S band G652 FRA. The stimulated threshold power of the forward first Stokes SBS (SB₁^- ) in the backward pumped FRA is 6.6mW. In experimental work, the saturation gain of SB₁^- is about 49dB and the saturation gain of 25km G652 backward FRA is about 10dB, so the gain of SB₁^- in the forward fiber Brillouin amplifier is about 39dB.

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Zaixuan Zhang, Bizhi Dai, Laixiao Li, Haifeng Xu, Dan Geng, Honglina Liu, Jianafeng Wang, Chenxia Li, Tiao Liu, and Insoo S. Kim "Experimental study of Raman amplification on stimulated Brillouin scattering in the G652 fibers at 1520nm", Proc. SPIE 6027, ICO20: Optical Information Processing, 602742 (20 January 2006); https://doi.org/10.1117/12.668393

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