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Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 2002),
  • paper CTuO6

A 9.5 Watt, 82 MHz-repetition-rate Picosecond Optical Parametric Generator with cw Diode Laser Injection Seeding

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Abstract

A source commonly used for the generation of ultrashort infrared pulses are synchronously pumped optical parametric oscillators (OPOs) excited by mode-locked cw-diode-pumped solid- state lasers. One of the main restrictions of synchronously pumped OPOs is the requirement of a precise synchronization of the pump laser repetition rate with the roundtrip time in the singly resonant OPO cavity. In contrast to an OPO the operation of an optical parametric generator (OPG) is simpler requiring no resonator and no synchronization. On the other hand an OPG relies on a large single pass gain in the order of 80 dB. To generate such high parametric gain a pump intensity in the range of GW/cm2 or even higher is needed. Therefore most OPGs demonstrated so far are based on low-repetition-rate or single-shot pump lasers, which limits the average output power to the mW range.1–3 The only OPG pumped by the full repetition rate of a mode- locked laser demonstrated so far is a PPLN OPG which is excited by a femtosecond Yb:YAG laser with 35 MHz and an maximum output power of 500 mW.4

© 2002 Optical Society of America

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