Title:
強化された周波数ロッキングを備えたコヒーレントトランスポンダ
Document Type and Number:
Japanese Patent JP5856696
Kind Code:
B2
Abstract:
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.
Inventors:
Salsi, massimiliano
Bertrand-Pardo, Oriole
Bertrand-Pardo, Oriole
Application Number:
JP2014559142A
Publication Date:
February 10, 2016
Filing Date:
February 12, 2013
Export Citation:
Assignee:
Alcatel-Lucent
International Classes:
H04B10/61; H04B10/07; H04J14/00; H04J14/02
Domestic Patent References:
| JP11218728A | ||||
| JP8321825A |
Foreign References:
| US20100183294 | ||||
| US20080138065 |
Other References:
J.C.M.Diniz et al.,Simple feed-forward wide-range frequency offset estimator for optical coherent receivers,Optics Express [オンライン],米国,The Optical Society,2011年,Vol.19, Issue.26,pp.B323-B328,[検索日 2015.11.20], インターネット
Attorney, Agent or Firm:
Kawaguchi International Patent Office