| 摘要 |
An optical transmission system uses eg a Mach Zehnder interferometer (13, 14) to convert the frequency shift keyed (FSK) optical output of an injection laser (12) to intensity modulation (IM) which is diplexed with the signal from a second injection laser (12') powering the other input port of the interferometer, thereby obviating the need for a separate diplexer to combine the two channels. <IMAGE> |
