The oscillation properties of a doubly resonant optical parametric oscillator with intracavity second-harmonic generation are analyzed. Because of a seeding effect, the second-harmonic-generation element induces a significant power transfer between the idler and the signal waves as the frequency division is tuned across 2ωi=ωs. This power transfer results in a narrow dip or peak in the relationships of the signal and the idler output powers versus the frequency. By employing the technique of scanning-type amplitude stabilization, one can achieve accurate frequency division.
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Zhang et al. (1997) studied this question.
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