发明名称 |
Method and apparatus for measuring optical power of very weak light, and optical communication system using the same |
摘要 |
A method and apparatus for measuring the optical power of very weak light arriving at a receiver, by using a photon detector, are provided. A photon detector detects the presence or absence of the arrival of a photon in accordance with bias application timing. For a train of optical pulses coming in at an arbitrary timing in respective time slots, the bias application timing is sequentially shifted within the range of a time slot. Each time a shift is made, the number of photons detected is counted by a photon counter. Based on this number of photons, the optical power of the train of the optical pulses is measured.
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申请公布号 |
EP1780912(A1) |
申请公布日期 |
2007.05.02 |
申请号 |
EP20060022726 |
申请日期 |
2006.10.31 |
申请人 |
NEC CORPORATION |
发明人 |
MAEDA, WAKAKO;TAJIMA, AKIO;TANAKA, AKIHIRO;TAKAHASHI, SEIGO |
分类号 |
H04B10/158;H04L9/08 |
主分类号 |
H04B10/158 |
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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