We employed a 9-mm long periodically-poled KTiOPO4 (PPKTP) crystal in an optical parametric oscillator (OPO) to generate sub-nanosecond idler pulses around 2.8 µm. With a 1-cm long OPO cavity in a singly resonant configuration and double pass pumping by 1-ns pulses at 1064 nm the maximum idler energy reached 110 µJ at 1 kHz. Pumping with 500 ps pulses at 1-10 kHz, resulted in an idler energy of ~50 µJ and the shortest pulse duration of ~250 ps ever reported for an OPO. The corresponding quantum conversion efficiencies were 32.5% and 34.9%, respectively.
Sub-nanosecond, 1-10 kHz, low-threshold, non-critical OPOs based on periodically-poled KTP crystal pumped at 1064 nm
DALLOCCHIO, PAOLO;PIRZIO, FEDERICO;AGNESI, ANTONIANGELO;REALI, GIANCARLO;
2012-01-01
Abstract
We employed a 9-mm long periodically-poled KTiOPO4 (PPKTP) crystal in an optical parametric oscillator (OPO) to generate sub-nanosecond idler pulses around 2.8 µm. With a 1-cm long OPO cavity in a singly resonant configuration and double pass pumping by 1-ns pulses at 1064 nm the maximum idler energy reached 110 µJ at 1 kHz. Pumping with 500 ps pulses at 1-10 kHz, resulted in an idler energy of ~50 µJ and the shortest pulse duration of ~250 ps ever reported for an OPO. The corresponding quantum conversion efficiencies were 32.5% and 34.9%, respectively.File in questo prodotto:
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