Abstract
A temperature tuned cw doubly resonant optical parametric oscillator (DRO) consisting of a semi-monolithic KTP crystal and a concave mirror has been designed and built. Both critical and noncritical type 11 phase match KTP crystals are used separately. Under single-axial-mode pair operation, the output power combined signal and idler light fields up to 365mW were obtained at pump power of 680mW with critical phase match KTP. The output wavelength of the DRO can be temperature tuned over a range of 9nm around 1 064nm. Using non-critical phase matching KTP, the frequency tunable DRO was also realized in nondegeneration, the wavelength tuning is over 5nm around 1041nm and 1089nm, the quantum correlation between twin beams was also observed in whole tuning region. 2.8GHz continuous frequency tuning of the DRO was achieved in both case by tuning of the pump laser frequency. The pump laser was homemade all-solid-state intracavity frequency doubled and stabilized YVO4 laser at 532nm.
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