title: Compact, fiber-compatible, cascaded Raman laser.
abstract: Cascaded Raman Stokes lasing in an ultrahigh-Q silica microsphere resonator coupled to a tapered fiber is demonstrated and analyzed. With less than 900 microW of pump power near 980 nm, five cascaded Stokes lasing lines are generated. In addition, a threshold power of 56.4 microW for the first-order Stokes lasing is achieved. The Stokes lasing lines exhibit distinct characteristics depending on their order, as predicted by theoretical analysis.
authors.affiliation: Department of Applied Physics, California Institute of Technology, Pasadena, California 91125, USA.
authors.forename: Bumki
authors.initials: B
authors.lastname: Min
authors.forename: Tobias J
authors.initials: TJ
authors.lastname: Kippenberg
authors.forename: Kerry J
authors.initials: KJ
authors.lastname: Vahala