2重超音波を利用して発生させた光ビートの応用
II. 位相検出
1973 年 42 巻 8 号 p. 812-815
詳細
1973 年 42 巻 8 号 p. 812-815
Phase demodulation of an optical beat signal is demonstrated analytically and experimen-tally. In an ordinary room for experiments a pair of different successive ultrasonic waves can generate a stable beat signal operating at the difference in frequency between the two ultrasonic waves. A conventional phase demodulation technique can be available for recover-ing the phase of the generated beat signal. This system puts forth its potential in real-time processing for time-dependent optical phases. As an example, the phase fluctuation of the beat signal, caused by thermally turbulent atmosphere, is processed statistically with satisfactory accuracy.
