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- W1997914344 abstract "We demonstrate improved signal and idler-beam quality of a 3-mm-aperture quasi-phase-matched RbTiOAsO4 optical parametric oscillator through use of a confocal unstable resonator as compared with a plane-parallel resonator. Both oscillators were singly resonant, and the periodically poled RbTiOAsO4 crystal generated a signal at 1.56 µm and an idler at 3.33 µm when pumped at 1.064 µm. We compared the beam quality produced by the 1.2-magnification confocal unstable resonator with the beam quality produced by the plane-parallel resonator by measuring the signal and the idler beam M2 value. We also investigated the effect of pump-beam intensity distribution by comparing the result of a Gaussian and a top-hat intensity profile pump beam. We generated a signal beam of M2 ≈ 7 and an idler beam of M2 ≈ 2.5 through use of an unstable resonator and a Gaussian intensity profile pump beam. This corresponds to an increase of a factor of approximately 2 in beam quality for the signal and a factor of 3 for the idler, compared with the beam quality of the plane-parallel resonator optical parametric oscillator." @default.
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- W1997914344 date "2001-10-20" @default.
- W1997914344 modified "2023-10-18" @default.
- W1997914344 title "Unstable resonator optical parametric oscillator based on quasi-phase-matched RbTiOAsO_4" @default.
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- W1997914344 doi "https://doi.org/10.1364/ao.40.005446" @default.
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