Frequency tuning characteristics of a continuous-wave Raman laser in H_2

Abstract
In light of possible spectroscopic applications, we examine the continuous frequency tuning characteristics of a nonresonant continuous-wave Raman laser in H2. We demonstrate a continuous tuning range for the Raman-shifted Stokes output of roughly 2.5 GHz, which is limited by spatial mode hops. Nearly constant output power across this range is predicted and observed by pumping the Raman laser cavity near four times threshold.