Verfahren zum Senden und Empfangen von kohärenten Lichtsignalen
摘要
The invention relates to a method for transmission and receipt of coherent light signals. Each subscriber is provided with an optical heterodyne detection circuit. An oscillation light of an optical local oscillator (3) is divided to a local oscillation light (4) for the heterodyne detection and a transmitting light (20) for data communication. A channel for those lights is selected from vacant communication channels. The transmitting light (20) may be obtained from a transmission light oscillator which is controlled by a control unit common to the optical local oscillator. <IMAGE>
申请公布号
DE69131092(D1)
申请公布日期
1999.05.12
申请号
DE1991631092
申请日期
1991.12.06
申请人
NEC CORP., TOKIO/TOKYO, JP
发明人
SHIKADA, MINORU, C/O NEC CORPORATION, MINATO-KU, TOKYO, JP