公开(公告)号：CA2381682A1

公开(公告)日：2002-11-23

申请号：CA2381682

申请日：2002-04-12

Applicant: LUCENT TECHNOLOGIES INC

Inventor： XU CHUNHUI ,  DINU MIHAELA ,  KNOX WAYNE HARVEY ,  STUART HOWARD ROY ,  GARCIA HERNANDO ,  KILPER DANIEL CHARLES

IPC: G02F3/00 ,  H04B10/02 ,  H04B10/08 ,  H04B10/20 ,  H04B17/00 ,  H04J14/02

Abstract: An optical performance monitor (OPM), e.g., for use in an optical network. T he OPM may be configured to characterize one or more impairments in an optical signal modulated with data. The OPM has an optical autocorrelator configured to sample the autocorrelati on function of the optical signal, e.g., using two-photon absorption. Autocorrelation points at various bit delays independently or in combination with average optical power may be used to detect and/or quantify one or more of the following: loss of data modulation, signal contrast, puls e broadening, peak power fluctuations, timing jitter, and deviations from the pseudo-random character of data. In addition, the OPM may be configured to perform Fourier transformation based on the autocorrelation points to obtain corresponding spectral components. The spectral components may be used to detect and/or quantify one or more of chromatic dispersion, polarization mode dispersion, and misalignment of a pulse carver and data modulator. The OPM m ay be further configured to generate feedback, e.g., to network operators to improve netwo rk performance.