Method, device, and system for regenerating optical signal

Optical communications – Transmitter and receiver system – Including compensation

Reexamination Certificate

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Details

C398S140000, C398S141000, C398S147000, C398S146000, C398S148000, C398S173000, C398S175000, C398S179000, C398S079000, C398S080000, C398S081000, C398S097000, C385S024000, C385S037000, C385S027000, C385S001000, C385S038000, C385S122000, C385S123000

Reexamination Certificate

active

07039324

ABSTRACT:
The present invention relates to a method for regenerating an optical signal suitable for WDM (wavelength division multiplexing). In this method, an optical signal is supplied to an optical waveguide structure (e.g., optical fiber) for providing a nonlinear effect. As a result, the optical signal undergoes chirp induced by the nonlinear effect. Then, an output optical signal output from the optical waveguide structure is supplied to an optical filter to thereby remove a small-chirp component from the output optical signal. By removing the small-chirp component from the output optical signal in the form of pulse, intensity fluctuations or accumulated noise especially at a top portion and/or a low-power portion of the pulse can be removed. Accordingly, the optical signal can be regenerated independently of the bit rate, pulse shape, etc. of the optical signal.

REFERENCES:
patent: 6141129 (2000-10-01), Mamyshev
patent: 6233385 (2001-05-01), Taneda et al.
patent: 6243181 (2001-06-01), Golovchenko et al.
patent: 6408114 (2002-06-01), Hamaide et al.
patent: 6538788 (2003-03-01), Franco et al.
patent: 6738542 (2004-05-01), Doran et al.
patent: 2002/0041618 (2002-04-01), Watanabe et al.
patent: 0 375 253 (1990-06-01), None
patent: 0 862 284 (1998-09-01), None
patent: 11284261 (1999-10-01), None
European Search Report mailed Oct. 13, 2005.

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