| 发明名称 |
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| 摘要 |
A telecommunication system has a laser-energized multimode optical fibre highway. Data is entered on to the highway by means of a series of modulators each operating at a different subcarrier frequency. At the far end of the highway demodulation is carried out be a quadrant photodetector which applies each of its outputs to a respective set of channels. Each channel in a set has a band pass filter centered on a subcarrier frequency followed by a non-linear device. The signals from all the channels of different sets carrying the same subcarrier frequency are combined and the signals passed through band pass filters centered on the second harmonic of the subcarrier frequency. |
| 申请公布号 |
JPS6217906(B2) |
申请公布日期 |
1987.04.20 |
| 申请号 |
JP19790048909 |
申请日期 |
1979.04.20 |
| 申请人 |
NAT RES DEV |
发明人 |
DEIUITSUDO EUAN NOOTON DEIUISU;SUCHUAATO AREKISANDAA KINGUSURII |
| 分类号 |
H04B10/00;G02F1/01;H04B10/04;H04B10/06;H04B10/142;H04B10/152;H04B10/20;H04J14/00;H04J14/02;H04J14/04;H04J14/06 |
主分类号 |
H04B10/00 |
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