8 May 2012 High power high repetition rate picosecond optical parametric oscillator pumped by frequency doubled all-fiber Yb-doped MOPA
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Abstract
We demonstrate a lithium triborate (LBO) optical parametric oscillator (OPO), which is synchronously pumped with a pulse-compressed and frequency-doubled master-oscillator power-amplifier (MOPA) system consisting of a gain-switched laser diode and a series of Ytterbium-doped fiber amplifiers. The 20ps pulses from the MOPA were compressed in a transmission grating compressor down to 4.4ps with a throughput efficiency of ~70% and subsequently frequency-doubled with an efficiency of ~60% in a 20mm long LBO to a maximum of ~25W. With a typical pump power of 17W for the OPO, we obtained a maximum combined signal and idler output power of 2.5W (at 877nm) and 1.7W (at 1.3μm). Individually, a maximum signal power of up to 3.7W at 740 nm was obtained with a signal pulse duration of ~3.2ps. The OPO was widely tunable from 651nm-1040nm (signal) and from 1081nm-2851nm (idler). To the best of our knowledge, this is the highest output power from a green-pumped LBO OPO. The fiber-based pump source can potentially be operated between 100MHz and 1GHz, which in combination with the few-picosecond pulses and the near-IR tunability of the OPO is a very attractive source for nonlinear microscopy.
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Florian Kienle, Florian Kienle, Shaif-ul Alam, Shaif-ul Alam, Peh Siong Teh, Peh Siong Teh, Dejiao Lin, Dejiao Lin, Jonathan H. V. Price, Jonathan H. V. Price, David C. Hanna, David C. Hanna, David J. Richardson, David J. Richardson, David P. Shepherd, David P. Shepherd, } "High power high repetition rate picosecond optical parametric oscillator pumped by frequency doubled all-fiber Yb-doped MOPA", Proc. SPIE 8433, Laser Sources and Applications, 843302 (8 May 2012); doi: 10.1117/12.922852; https://doi.org/10.1117/12.922852
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