Optical communications – Transmitter and receiver system – Including polarization
Reexamination Certificate
2002-11-27
2008-11-04
Sedighian, M. R. (Department: 2613)
Optical communications
Transmitter and receiver system
Including polarization
C398S149000
Reexamination Certificate
active
07447441
ABSTRACT:
An apparatus and method of transmitting a plurality of polarized signals having different wavelengths through a length of signal transmission cable which changes the polarization of the signals in correspondence with their amplitudes and wavelengths. A dynamic filter capable of differential adjustment of the amplitudes of the signals and a polarizing element are provided in series with the length of signal transmission cable and the amplitudes of the different wavelength signals are so adjusted that the polarization states of the signals move towards alignment with the low-loss axis of the polarizing element. An advantage provided by the apparatus and method is that the high-amplitude signals are aligned with the low-loss axis of the polarizing element while low-amplitude noise is aligned with the high-loss axis of the polarizing element, resulting in an improvement in signal-to-noise ratio.
REFERENCES:
patent: 5524144 (1996-06-01), Suzuki
patent: 6823142 (2004-11-01), Tanaka et al.
patent: 7068944 (2006-06-01), Sorin
patent: 2002/0149823 (2002-10-01), Bergano et al.
patent: 0 562 514 (1998-12-01), None
patent: 1 133 083 (2001-09-01), None
patent: 1 180 861 (2002-02-01), None
patent: 2 267 405 (1993-12-01), None
patent: WO 01/48541 (2001-07-01), None
patent: WO 01/67644 (2001-09-01), None
Alleston Steven
Doran Nicholas John
Govan Donald
Harper Paul
Ericsson AB
Kirschstein et al.
Sedighian M. R.
LandOfFree
Signal transmission apparatus and a method of signal... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Signal transmission apparatus and a method of signal..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal transmission apparatus and a method of signal... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4034037