Abstract

Light amplification using stimulated Raman scattering (SRS) in a single-mode optical fiber is of great interest in optical communications, because of a high gain and a high speed response time. It can be applied to the extension of transmission length or to the transmission of ultra-short pulses. The highly P₂O₅-doped silica single-mode fiber has a strong Raman scattering peak at 1320 cm⁻¹, i. e. its frequency shift is three times as large as silica fibers[1]. Therefore, the fibers are very advantageous that 1.5-μm band light can be generated by SRS with a 1.3-μm band pumping light source[2]. However, there is no report on characteristics of Raman amplification in P₂O₅-doped fibers, so far. This paper describes the highly efficient Raman amplification of highly P₂O₅-doped silica single-mode fiber. Pump power dependence of the optical gain, gain bandwidth, and noise properties in the Raman amplifier are described.

© 1988 Optical Society of America