Carrier-suppressed optical time domain multiplexing

Optical communications – Multiplex – Time division

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C398S075000, C398S099000

Reexamination Certificate

active

07574139

ABSTRACT:
A method and an apparatus for implementing carrier suppressed data format on conventional OTDM modules is provided. Adaptive phase shifting of optical signals traversing one of the tributaries of an OTDM module is performed with feedback loop control. A tapped portion of the input carrier signal is phase modulated at a frequency fc, and is combined with a tapped portion of the output from the OTDM. A phase shifter controller fed with this combined signal photodetects and band-pass filters the signal around fcto extract the amplitude of the AC component of the envelope of the combined signal, which depends upon the phase difference between successive pulses of the OTDM output. This signal is used to control a phase shifter coupled along one of the tributaries of the OTDM to adjust the phase difference of the signals of the two tributaries so that carrier suppression results.

REFERENCES:
patent: 5781327 (1998-07-01), Brock et al.
patent: 6763197 (2004-07-01), Hirano et al.
patent: 2003/0058499 (2003-03-01), Reingand et al.
patent: 2006/0093377 (2006-05-01), Choudhary et al.
Akihide Sano and Yutaka Miyamoto,Member, IEEE,“Performance Evaluation of Prechirped RZ and CS-RZ Formats in High-Speed Transmission Systems With Dispersion Management”, Journal of Lightwave Technology, vol. 19, No. 12, Dec. 2001, pp. 1864-1871.
Yanjun Zhu, W.S. Lee, C. Scahill, D. Watley, C. Fludger, P. Bontemps, M. Jones, G. Pettitt, B. Shaw and A. Hadjifotiou, “” 16-channel 40 Gb/s carrier-suppressed RZ ETDM/DWDM transmission over 720 km NDSF without polarisation channel interleaving, pp. ThF4-1-ThF4-4, 2001.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Carrier-suppressed optical time domain multiplexing does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Carrier-suppressed optical time domain multiplexing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Carrier-suppressed optical time domain multiplexing will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4116566

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.