, Volume 74, Issue 4-5, pp 313-317

Harmonic repetition-rate femtosecond optical parametric oscillator

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Abstract.

We report on a femtosecond optical parametric oscillator (OPO) with a repetition rate of 1 GHz, which is 12 times that of the pump laser used. We also introduce a novel method for operating an OPO with a high harmonic repetition rate which is not determined by the cavity length of the OPO, but rather the cavity length difference between the OPO and its pump laser. Operation of an OPO at 4-times the harmonic repetition rate has been carried out to show the feasibility of this method. The new approach paves the way for constructing a femtosecond OPO working at repetition rates of 10 GHz, or higher, when the pump laser used has a relatively low repetition rate.

Received: 26 October 2001 / Revised version: 11 Januar 2002 / Published online: 14 March 2002