发明名称 |
Measuring differential group delay in an optical fiber connection |
摘要 |
The differential group delay is measured in an optical fiber connection for an optical signal undergoing a phase modulation BPSK or DPSK by a digital signal at a given rate. A polarization controller at an emerging end of the connection scans polarization states of the modulated optical signal. An emulator iteratively introduces an additional delay in the modulated optical signal emerging from the connection and combines the delayed modulated optical signal and the non delayed modulated optical signal which are both polarized along two orthogonal axes into a resulting optical signal. A polarization controller and a fixed polarizer select a polarization state in the resulting optical signal along one of bisecting lines of the orthogonal axes into a linearly polarized signal. An eye diagram or a spectrum of the polarized signal is acquired by a digital oscilloscope or an optical spectrum analyzer to determine the differential group delay.
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申请公布号 |
US8280246(B2) |
申请公布日期 |
2012.10.02 |
申请号 |
US20090626080 |
申请日期 |
2009.11.25 |
申请人 |
PINCEMIN ERWAN;HUI BON HOA DANIEL;GAVIGNET PAULETTE;DOURTHE CHRISTIAN;FRANCE TELECOM |
发明人 |
PINCEMIN ERWAN;HUI BON HOA DANIEL;GAVIGNET PAULETTE;DOURTHE CHRISTIAN |
分类号 |
H04B10/077 |
主分类号 |
H04B10/077 |
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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