| 发明名称 |
Optical hybrid with 3x3 coupling device |
| 摘要 |
In known coherent optical receivers comprising two detectors, optical 90 DEG hybrids have a 'throughput' </=25%. Theoretical analysis reveals that a higher 'throughput' of up to a maximum of approximately 29.3% is possible. The invention provides such a 90 DEG hybrid (30) of the coupler type with the aid of a 2x2 port which is based on a loss-free 3x3 directional coupler having the maximum throughput ratios between two of the inputs (31/39, 32/40) and two of the outputs (39/34, 40/35) and the 90 DEG phase difference between said two outputs, the third input and the third output not being used. An integrated version employing indium phosphide is described.
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| 申请公布号 |
US5491763(A) |
申请公布日期 |
1996.02.13 |
| 申请号 |
US19930061302 |
申请日期 |
1993.05.13 |
| 申请人 |
KONINKLIJKE PTT NEDERLAND N.V. |
发明人 |
VAN DEVENTER, MATTIJS O.;VAN DER TOL, JOHANNES J. G. M. |
| 分类号 |
G02B6/34;H04B10/148;(IPC1-7):G02B6/26 |
主分类号 |
G02B6/34 |
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