Cascaded Raman Stokes lasing in an ultrahigh- Q silica microsphere resonator coupled to a tapered fiber is demonstrated and analyzed. With less than 900 μW of pump power near 980 nm, five cascaded Stokes lasing lines are generated. In addition, a threshold power of 56.4 μW for the first-order Stokes lasing is achieved. The Stokes lasing lines exhibit distinct characteristics depending on their order, as predicted by theoretical analysis.
© 2003 Optical Society of America
(140.3550) Lasers and laser optics : Lasers, Raman
(140.4780) Lasers and laser optics : Optical resonators
(190.5650) Nonlinear optics : Raman effect
(230.3990) Optical devices : Micro-optical devices
Bumki Min, Tobias J. Kippenberg, and Kerry J. Vahala, "Compact, fiber-compatible, cascaded Raman laser," Opt. Lett. 28, 1507-1509 (2003)