发明名称 |
Channel selection in an optical tdma network |
摘要 |
A receiver at a node in an optical network receives an optical clock signal and an OTDM datastream. A detector converts the clock signal to the electrical domain. A variable delay stage applies a selected delay to the clock signal in the electrical domain. A non-linear electro-optic modulator which may be an electro-absorption modulator, receives the OTDM datastream at its optical input. An electrical control input of the modulator is connected to the output of the variable delay stage. The electro-optic modulator outputs an OTDM channel selected by setting the delay of the variable delay stage. The variable delay stage may include a number of logic gates, particularly AND gates, connected between a pair of microstrip delay lines. The gates are controlled to provide different paths with different corresponding delay times for the clock signal. |
申请公布号 |
AU1802997(A) |
申请公布日期 |
1997.09.10 |
申请号 |
AU19970018029 |
申请日期 |
1997.02.14 |
申请人 |
BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY |
发明人 |
KEVIN SMITH;JULIAN KAZIMIERZ LUCEK;DANNY ROBERT PITCHER;TERENCE WIDDOWSON;DAVID GRAHAM MOODIE |
分类号 |
G02F1/015;H04B10/50;H04B10/508;H04J;H04J3/00;H04J3/02;H04J3/04;H04J14/08;H04L7/00;H04L7/033 |
主分类号 |
G02F1/015 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|