Reentrant two-mirror ring resonator for generation of a single-frequency green laser.
A nonplanar, reentrant two-spherical-mirror ring cavity is demonstrated. It is compact and free of astigmatism. Unidirectional operation is achieved by use of reciprocal and nonreciprocal polarization rotators to differentiate round-trip loss. A single-frequency green laser is generated by intracavity frequency doubling. Amplitude noise as low as 0.25% is achieved.
Cheng
H Z
HZ
Huang
P L
PL
Huang
S L
SL
Kao
F J
FJ