Increasing the output energy of the Raman laser by a repeated use of a depleted pump
A method for increasing the output energy of an extracavity Raman laser with a double-pass pump is proposed. The me­thod is based on the repeated recovery of a depleted pump in the zone of SRS generation and is demonstrated by the example of eye-safe Raman lasers with a KGW crystal pumped at geometries of E | I Ng, and Е | I Nm by pulsed multimode radiation of a Nd:KGW-laser with a 4F3/2 - 4I13/2 working transition. When returning 70 % of a depleted pump in the Raman laser, an efficiency of generation of eye-safe radiation at wavelengths of 1507 and 1538 nm increases by approximately 11 %.