F. Kienle, K. K. Cheng, S. Alam, C. B. E. Gawith, J. I.Mackenzie, D. C. Hanna, D. J. Richardson, and D. P. Shepherd
Abstract
We demonstrate a picosecond optical parametric oscillator (OPO) that is synchronously pumped by a fiber-amplified gain-switched laser diode. At 24W of pump power, up to 7.3W at 1.54μm and 3.1W at 3.4μm is obtained in separate output beams. The periodically poled MgO-doped LiNbO3 OPO operates with 17ps pulses at a fundamental repetition rate of 114.8MHz but can be switched to higher repetition rates up to 1GHz. Tunabilty between 1.4μm and 1.7μm (signal) and 2.9μm and 4.4μm (idler) is demonstrated by translating the nonlinear crystal to access different poling-period gratings and typical M2 values of 1.1 by 1.2 (signal) and 1.6 by 3.2 (idler) are measured at high power for the singly resonant oscillator.
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