We report an efficient 532 nm pumped external cavity diamond Raman laser generating output chiefly at the 573 nm first Stokes. At a pulse repetition rate of 5 kHz, the Raman laser generated 1.2 W output with a conversion efficiency of 63.5%, a slope efficiency of 75%, a pulse peak instantaneous conversion efficiency of 85%, and a peak photon conversion efficiency of 91%. The laser generated a maximum output energy of 0.67 mJ by increasing the pump beam size and the pulse energy. The efficiency is commensurate with the highest previously reported for other Raman materials pumped by Q-switched lasers.
© 2009 Optical Society of America
(140.3550) Lasers and laser optics : Lasers, Raman
(140.3580) Lasers and laser optics : Lasers, solid-state
(140.7300) Lasers and laser optics : Visible lasers
(160.3380) Materials : Laser materials
(160.4330) Materials : Nonlinear optical materials
(190.2640) Nonlinear optics : Stimulated scattering, modulation, etc.
Lasers and Laser Optics
Original Manuscript: June 23, 2009
Revised Manuscript: August 11, 2009
Manuscript Accepted: August 12, 2009
Published: September 10, 2009
R. P. Mildren and A. Sabella, "Highly efficient diamond Raman laser," Opt. Lett. 34, 2811-2813 (2009)