title: High-power 390-nm laser source based on efficient frequency doubling of a tapered diode laser in an external resonant cavity.
abstract: We frequency doubled the single-frequency beam from an external-cavity tapered laser diode operating at 780 nm in a resonant cavity containing a beta -barium borate crystal to generate an output at 390 nm with high efficiency. Output powers as great as 233 mW were obtained, corresponding to an efficiency of 65%/W . The resonant-cavity design was a low-loss three-mirror configuration that provided compensation for astigmatism and coma. The laser diode frequency was locked to the doubling-cavity resonance by use of the Hänsch-Couillaud discrimination technique.
authors: Polaroid Corporation, Cambridge, Massachusetts 02139, USA.
authors: J D
authors: JD
authors: Bhawalkar
authors: Y
authors: Y
authors: Mao
authors: H
authors: H
authors: Po
authors: A K
authors: AK
authors: Goyal
authors: P
authors: P
authors: Gavrilovic
authors: Y
authors: Y
authors: Conturie
authors: S
authors: S
authors: Singh