Abstract
We report on a self-guided operation of a green-pumped singly resonant continuous-wave optical parametric oscillator with a bulk MgO-doped PPLN crystal. It is achieved by increasing the OPO cavity length beyond the stability boundary so that the OPO can only oscillate with formation of a thermally induced waveguide inside the crystal. The effects of the thermal waveguide on the OPO performance are studied by measuring output power characteristics at different cavity lengths. Improvement of spatial mode quality and stability of output power by self-guiding is demonstrated. Measurement of temporal characteristics proves that formation of the waveguide originates from the photo-thermal effect in the nonlinear crystal by absorption of pump power.
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Bae, IH., Moon, HS., Kim, SK. et al. Self-guided operation of singly resonant continuous-wave optical parametric oscillator based on bulk MgO-doped PPLN. Appl. Phys. B 106, 797–801 (2012). https://doi.org/10.1007/s00340-012-4922-z
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DOI: https://doi.org/10.1007/s00340-012-4922-z