发明名称 |
Kanalvalg i et optisk TDMA-nettverk |
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 |
NO983896(D0) |
申请公布日期 |
1998.08.25 |
申请号 |
NO19980003896 |
申请日期 |
1998.08.25 |
申请人 |
BRITISH TELECOMMUNICATIONS PLC |
发明人 |
SMITH, KEVIN;LUCEK, JULIAN KAZIMIERZ;PITCHER, DANNY ROBERT;WIDDOWSON, TERENCE;MOODIE, DAVID GRAHAM |
分类号 |
G02F1/015;H04B10/50;H04B10/508;H04J;H04J3/00;H04J3/02;H04J3/04;H04J14/08;H04L7/00;H04L7/033;(IPC1-7):H04J |
主分类号 |
G02F1/015 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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