Abstract
We report a compact and viable source of broadband, high-power, cw, mid-IR radiation based on a singly resonant optical parametric oscillator (SRO) pumped by a wide-bandwidth cw Yb fiber laser centered at . By exploiting the extended phase-matching bandwidth in a crystal of MgO:PPLN and a ring SRO cavity, we obtain of broadband idler output for of pump at depletion, transferring a pump bandwidth of to an idler spectrum spread across an equal bandwidth centered at . By deploying output coupling of the signal, we generate of total power at 44% extraction efficiency with a pump depletion of at the maximum available pump power. Measurements of transverse modal power confirm Gaussian distribution of signal and idler beams.
© 2009 Optical Society of America
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