A time-dispersion-tuned fiber Raman oscillator

Abstract

By using a novel time-dispersion-tuning scheme a fiber Raman oscillator pumped by a mode-locked argon laser has been tuned within the broad Raman gain bandwidth (∼400 cm−1) of silica glass by varying the resonator length. A tuning range of 40 Å in the green is obtained with an average pump power of 1.6 W. A combination of time dispersion and prism tuning extends this range to 134 Å (5153–5287 Å). Tunable Raman oscillation with lower threshold in the 1-μ region should be possible with a mode-locked Nd : YAG laser pump.