Abstract
We report the first green-pumped continuous-wave (cw) optical parametric oscillator (OPO) based on MgO:PPLN in a fanout grating design. Pumped by a single-frequency cw laser at 532 nm, the OPO provides tunable radiation across 813–1032 nm in the signal and 1098–1539 nm in the idler by simple mechanical translation at a fixed temperature of 55°C. By deploying a 25-mm-long crystal to minimize thermal effects and using output coupling for the signal wave, we generate a total output power of up to 714 mW at 30% extraction efficiency in excellent Gaussian beam quality with ${M^2} \lt {1.1}$ and high output stability. Simultaneous measurements of signal and idler power result in passive stability of 2.8% and 1.8% rms, respectively, over 1 h. Strong thermal effects contribute to the high stability and excellent beam quality, while linear and green-induced infrared absorption limit the power scaling capabilities of the OPO. The output signal is single-mode with an instantaneous linewidth of ${\sim}{{3}}\;{\rm{MHz}}$ and frequency stability of ${\sim}{{84}}\;{\rm{MHz}}$ over 72 s.
© 2020 Optical Society of America
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Sukeert, S. Chaitanya Kumar, and M. Ebrahim-Zadeh, "Green-pumped continuous-wave parametric oscillator based on fanout–grating MgO:PPLN: publisher’s note," Opt. Lett. 46, 41-41 (2021)https://opg.optica.org/ol/abstract.cfm?uri=ol-46-1-41
30 November 2020: Typographical corrections were made to pp. 6486, 6487, and 6488.
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