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We have demonstrated a continuous-wave optical parametric oscillator that uses separate optical cavities to resonate independently the nondegenerate signal and idler frequencies. The three-mirror cavity utilizes the type II phase-matching geometry in lithium triborate, with the orthogonally polarized signal and idler fields separated by an intracavity, dichroic-coated, Brewster-angled beam splitter. This dual-cavity oscillator can overcome mode and cluster hopping effects, which are characteristic of doubly resonant, continuous-wave optical parametric oscillators. We measure a pump power threshold of almost-equal-to 200 mW and smooth tuning over almost-equal-to 0.4 GHz. The tuning range is limited by pump resonance effects within the idler cavity.
|Glasgow Author(s):||Padgett, Prof Miles|
|Authors:||Colville, FG, Padgett, MJ, and Dunn, MH|
|College/School:||College of Science and Engineering > School of Physics and Astronomy|
|Journal Name:||Applied Physics Letters|
|Journal Abbr.:||Appl. Phys. Lett.|