High-average-power mid-infrared ZnGeP2 optical parametric oscillator with a wavelength-dependent polarization rotator.
A wavelength-dependent polarization rotator is used to transform the orthogonal polarizations of the signal and idler of a near-degenerate type II KTP optical parametric oscillator (OPO) into a common polarization state. This common polarization allows a single ZnGeP2 OPO to fully utilize the 2 microm signal and idler KTP OPO outputs in a mid-IR conversion. The simple design of the wavelength-dependent polarization rotator yields a compact source that simultaneously generates four mid-JR wavelengths collinearly with a total mid-IR average power of 5.5 W at a >15 kHz pulse repetition rate.
DSO National Laboratories, 20, Science Park Drive, S118230 Singapore. ppohboon@alum.mit.edu
P B
PB
Phua
B S
BS
Tan
R F
RF
Wu
K S
KS
Lai
Lindy
L
Chia
Ernest
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Lau