Abstract

We report a high-power, cw, singly resonant optical parametric oscillator (SRO) using a simple, compact fiber pump laser architecture in the green. The SRO, based on MgO:sPPLT, is pumped by $9.6\mathrm{W}$ of single-frequency cw radiation at $532\mathrm{nm}$ obtained by single-pass second-harmonic generation (SHG) of a $30\mathrm{W}$ Yb fiber laser, also in MgO:sPPLT. Using two identical crystals of $30\mathrm{mm}$ length for SHG and SRO, we generate cw idler powers of up to $2\mathrm{W}$ over $855–1408\mathrm{nm}$, with a peak-to-peak power stability $<11.7\%$ over $40\min$, in a ${\mathrm{TEM}}_{00}$ spatial mode with $M^2<1.26$. Using finite output coupling of the resonant wave, we extract $800\mathrm{mW}$ of signal power with peak-to-peak power stability $<10.7\%$ over $40\min$, and a frequency stability $<75\mathrm{MHz}$ over $15\min$. The signal and idler output have ${\mathrm{TEM}}_{00}$ beam profile with $M^2<1.52$ across the tuning range.

© 2009 Optical Society of America

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