High-power 390-nm laser source based on efficient frequency doubling of a tapered diode laser in an external resonant cavity.
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.
Bhawalkar
J D
JD
Polaroid Corporation, Cambridge, Massachusetts 02139, USA.
Mao
Y
Y
Po
H
H
Goyal
A K
AK
Gavrilovic
P
P
Conturie
Y
Y
Singh
S
S