发明名称 |
COHERENT TRANSPONDER WITH ENHANCED FREQUENCY LOCKING |
摘要 |
The present document relates to an optical communication system. In particular, the present document relates to the alignment of the laser frequency at a transmitter of the optical communication system and the local oscillator frequency at a coherent receiver of the optical communication system. A coherent optical receiver (222) is described. The receiver (222) comprises a reception unit adapted to convert a received optical signal at a carrier frequency into a digital signal using a local oscillator, referred to as LO, having an LO frequency; a spectral analysis unit adapted to estimate a degree of asymmetry of a spectrum of the received optical signal, based on the digital signal; and a transmission unit adapted to transmit an indication of the degree of asymmetry to a near-end transponder (210) comprising a transmitter (211) of the received optical signal. |
申请公布号 |
US2015023674(A1) |
申请公布日期 |
2015.01.22 |
申请号 |
US201314373793 |
申请日期 |
2013.02.12 |
申请人 |
Alcatel Lucent |
发明人 |
Salsi Massimiliano;Bertran-Pardo Oriol |
分类号 |
H04B10/61;H04B10/2575 |
主分类号 |
H04B10/61 |
代理机构 |
|
代理人 |
|
主权项 |
1. A coherent optical receiver, comprising
a reception unit adapted to convert a received optical signal from a transmitter at a carrier frequency into a digital signal using a local oscillator, referred to as LO, having an LO frequency; a spectral analysis unit adapted to estimate a degree of asymmetry of a spectrum of the received optical signal, based on the digital signal; and a transmission unit adapted to transmit an indication of the degree of asymmetry to a near-end transponder comprising said transmitter of the received optical signal. |
地址 |
Boulogne Billancourt FR |