Raman lasing and cascaded coherent anti-Stokes Raman scattering of a two-phonon Raman band.
Raman lasing of a two-phonon Raman band in the anti-Stokes side is demonstrated. Two femtosecond light pulses with identical wavelengths are irradiated onto a SrTiO3 crystal in a cross-beam configuration. Under low excitation power, several wave-mixing signals with identical wavelengths are emitted. When the power exceeds a critical value, cascaded coherent anti-Stokes Raman scattering (CARS) signals are emitted, the frequency step of which is coincident with that of the strongest two-phonon Raman band of 2TO2.
Jun-ichi
Takahashi
T
Japan Science and Technology Agency (ERATO), Tsukuba, Ibaraki, Japan. takajun@joy.ocn.ne.jp
Keisuke
Mano
M
Toshirou
Yagi
Y