发明名称 |
Subtracting analog noise from an optical communication channel using stable, Non-Absorbing optical hard limiters |
摘要 |
Analog noise is subtracted from an optical communication channel using stable, non-absorbing optical hard limiters. A reference signal B is combined with a control signal of intensity I2 through a 3 dB optical coupler to form a first combined signal having an intensity substantially equal to (B/2 +I1). The first combined signal is processed by a first optical hard limiter to form a reflected signal having an intensity substantially equal to (I1-B/2). An information signal A is combined with a bias signal of intensity I2 through a 3 dB optical coupler to form a second combined signal. The reflected signal and the second combined signal are combined through a 3 dB optical coupler to form a third combined signal having an intensity substantially equal to 0.5(I1-B/2+A/2+I1). The third combined signal is processed by a second optical hard limiter to form a transmitted signal having an intensity substantially equal to 0.5(A-B). 12 is substantially equal to two times I1.
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申请公布号 |
US2002141683(A1) |
申请公布日期 |
2002.10.03 |
申请号 |
US20010933338 |
申请日期 |
2001.08.20 |
申请人 |
JOHNSON ERIK V;SARGENT EDWARD H |
发明人 |
JOHNSON ERIK V;SARGENT EDWARD H |
分类号 |
G02F1/017;G02F1/355;H04B10/18;(IPC1-7):G02B6/26 |
主分类号 |
G02F1/017 |
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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