| 摘要 |
A semiconductor laser light modulation and demodulation system to be used in light communication system is realized. In the modulation system, strength modulated pressure wave or electromagnetic wave is directly applied to an active region of a semiconductor laser element and the frequency modulation is effected by varying an effective length of a laser resonator formed by the element. In the demodulation system, modulation signal is derived by an interference of the received laser light by splitting and then joining together after passing an interferometer having different path length arms. |
