title: Monolithic diamond Raman laser.
abstract: A monolithic diamond Raman laser is reported. It utilizes a 13-mm radius of curvature lens etched onto the diamond surface and dielectric mirror coatings to form a stable resonator. The performance is compared to that of a monolithic diamond Raman laser operating in a plane-plane cavity. On pumping with a compact Q-switched laser at 532 nm (16 μJ pulse energy; 1.5 ns pulse duration; 10 kHz repetition-rate; M2<1.5), laser action was observed at the first, second, and third Stokes wavelengths (573 nm, 620 nm and 676 nm, respectively) in both cases. For the microlens cavity, a conversion efficiency of 84% was achieved from the pump to the total Raman output power, with a slope efficiency of 88%. This compares to a conversion efficiency of 59% and a slope efficiency of 74% for the plane-plane case. Total Raman output powers of 134 and 96 mW were achieved for the microlens and plane-plane cavities, respectively.
authors.forename: Sean
authors.initials: S
authors.lastname: Reilly
authors.forename: Vasili G
authors.initials: VG
authors.lastname: Savitski
authors.forename: Hangyu
authors.initials: H
authors.lastname: Liu
authors.forename: Erdan
authors.initials: E
authors.lastname: Gu
authors.forename: Martin D
authors.initials: MD
authors.lastname: Dawson
authors.forename: Alan J
authors.initials: AJ
authors.lastname: Kemp