Resonant Behaviors in Internally Frequency-Doubled Laser and Enhancement of Second-Harmonic Output

概要

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Responses of an internally frequency-doubled (IFD) laser to external cavity perturbations are studied both theoretically and experimentally. The oscillatory behavior of an IFD laser may be explained with the aid of a mechanical analogy. Nonlinear rate equations are solved numerically and the nonlinear response curves arc derived. The fundamental output is a train of high peak regular pulses under the resonance condition. When the perturbation frequency is detuned from the resonance frequency, the jump phenomenon occurs so that the peak intensity and the waveform of pulses abruptly change. The characteristic nonlinear response obtained in the numerical analysis was confirmed experimentally with the help of a Nd: YAG laser including a Ba_2NaNb_5O_<15> crystal. It is also indicated that the conversion to second-harmonic can be enhanced by the generated resonance phenomenon.
社団法人応用物理学会の論文
1976-03-05