The injection effect of weak Stokes seed radiation is demonstrated in a para-H2 Raman laser. Injected radiation from a PbSnTe diode laser as low as several microwatts resulted in an enhancement of 4 orders of magnitude in the output Stokes energy and a reduction in the pumping threshold energy of 22%. Characteristics of the injection are investigated as functions of the pumping energy, the Stokes seed frequency, and the polarization.
© 1989 Optical Society of America
Original Manuscript: May 15, 1989
Manuscript Accepted: October 4, 1989
Published: December 15, 1989
Masayuki Uchida, Keigo Nagasaka, and Hideo Tashiro, "Enhancement of Stokes conversion by diode-laser injection in a para-H2 Raman laser," Opt. Lett. 14, 1350-1352 (1989)