Over 200 W average power tunable Raman amplifier based on fused silica step index fiber

Abstract

A high-power tunable Raman Amplifier is presented. The seed signal (varying from 1118 nm to 1130 nm in wavelength) was generated in a tunable Raman oscillator and fed into the Raman amplification stage. A conversion efficiency of up to 86 % was achieved and a maximum output power of over 200 W was measured. The Raman gain coefficient for the amplifier fiber was measured to be 0.76× 10-hoch14 m/W. Furthermore, the measured output power was compared with values obtained from simple mathematical model and a good agreement up to the highest output power of amplified signal was achieved

Power scaling of high power Raman fiber laser

“…Not until 2009, Raman fiber lasers with output power over 100 W with high optical efficiency were reported in [2,3]. In 2010, Codemard et al demonstrated a 100 W continuous wave (CW) Raman fiber laser operating at 1120 nm, claddingpumped with an YDF laser [4].…”

Fiber-integrated frequency-doubling of a picosecond Raman laser to 560 nm

“…In contrast, well developed [7] Yb-fiber lasers operating around 1070 nm can be used to pump highly efficient Raman amplifiers operating at 1120 nm [8]. However, the long gain fiber lengths required with continuous wave (CW) pumping make it difficult to preserve narrow spectral linewidth pulsed signals, due to nonlinear spectral broadening through self-phase modulation (SPM).…”

Cladding-pumped Raman fiber laser with 0.78% quantum defect enabled by phosphorus-doped fiber

“…Accordingly, the RFL is a promising alternative for both high-power and low-QD fiber lasers. Up to hundreds of watt-level high-power RFLs in allfiber formats have been demonstrated by several independent groups [28][29][30][31] . By adopting a main-oscillator-power-amplifier structure, up to 3 kW RFLs have been demonstrated [32,33] .…”