Optical transmission system, optical transmitter for optical...

Optical communications – Receiver – Including postcompensation

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C398S188000, C398S140000, C398S158000, C398S163000, C398S183000, C398S212000, C398S213000

Reexamination Certificate

active

08005374

ABSTRACT:
An optical transmission system is provided in which the optimum operating point of a Mach-Zehnder interferometer, matched to the optical frequency of the light source on the transmitting side, can be set. The optical receiver (2) has an infinitesimal-modulated signal component detection circuit (222), which uses the signal train output from a balanced detection circuit (221) to detect the infinitesimal-modulated signal component applied to the phase adjustment terminal (201) of an MZI (200) by an infinitesimal-modulated signal oscillation circuit (224); a synchronous detection circuit (223), which synchronously detects the infinitesimal-modulated signals output from the infinitesimal-modulated signal component detection circuit (222) and infinitesimal-modulated signal oscillation circuit (224) and detects the error signal component arising from the shift between the optical signal carrier frequency and the optical frequency characteristic of the MZI (200); and a controller (207), which outputs a control signal to adjust the phase difference between two split optical signals output from the MZI (200) so as to correct the shift amount.

REFERENCES:
patent: 5359449 (1994-10-01), Nishimoto et al.
patent: 6005695 (1999-12-01), Roberts
patent: 6271959 (2001-08-01), Kim et al.
patent: 6317249 (2001-11-01), Nakamoto et al.
patent: 6362913 (2002-03-01), Ooi et al.
patent: 6396605 (2002-05-01), Heflinger et al.
patent: 7127183 (2006-10-01), Oguma
patent: 7177547 (2007-02-01), Case et al.
patent: 2002/0001116 (2002-01-01), Kajiya et al.
patent: 2005/0047780 (2005-03-01), Hoshida et al.
patent: 63-052530 (1988-03-01), None
patent: 02-113736 (1990-04-01), None
patent: 04-294318 (1992-10-01), None
patent: 07-066482 (1995-03-01), None
patent: 08-248366 (1996-09-01), None
patent: 08-279785 (1996-10-01), None
patent: 09-83433 (1997-03-01), None
patent: 10-065615 (1998-03-01), None
patent: 10-178397 (1998-06-01), None
patent: 63-228829 (1998-09-01), None
patent: 2000-59300 (2000-02-01), None
patent: 2000-162563 (2000-06-01), None
patent: 2000-171766 (2000-06-01), None
patent: 2000-206474 (2000-07-01), None
patent: 2001-251250 (2001-09-01), None
patent: 2002-23120 (2002-01-01), None
patent: 2002-023122 (2002-01-01), None
patent: 2002-111123 (2002-04-01), None
patent: 2002-156667 (2002-05-01), None
patent: 2003-309520 (2003-10-01), None
patent: 2004-032461 (2004-01-01), None
patent: 2004-037647 (2004-02-01), None
patent: 2005-535271 (2005-11-01), None
patent: 2004/013991 (2004-02-01), None
Nishizawa et al: “10-Gb/s Optical DPSK Packet Receiver Proof Against Large Power Fluctuations”, IEEE Photonics Technology Letter, vol. 11, No. 6, Jun. 1999, pp. 733-735.
Leibrich et al: “CF-RZ-DPSK for Suppression of XPM on Dispersion-Managed Long-Haul Optical WDM Transmission on Standard Single-Mode Fiber”, IEEE Photonics Technology Letter, vol. 14, No. 2, Feb. 2002, pp. 155-157.
Milivojevic et al: “Practical 40Gbit/s CSRZ-DPSK Transmission System With Signed Online Chromatic Dispersion Detection”, Proc. ECOC'03 Rimini, Italy 2 (2003) Tu3.6.4, pp. 268-269.
Swanson et al: “High Sensitivity Optically Preamplified Direct Detection DPSK Receiver With Active Delay-Line Stabilization”, IEEE Photonics Technology Letter, vol. 6, No. 2, Feb. 1994, pp. 263-265.
Nishizawa et al: “10-Gb/s Optical DPSK Packet Receiver Proof Against Large Power Fluctuations,” IEEE Photonics Technology Letter, vol. 11, No. 6, Jun. 1999, pp. 733-735.
Leibrich et al: “CF-RZ-DPSK for Suppression of XPM on Dispersion-Managed Long-Haul Optical WDM Transmission on Standard Single-Mode Fiber,” IEEE Photonics Technology Letter, vol. 14, No. 2, Feb. 2002, pp. 155-157.
Milivojevic et al: “Practical 40Gbit/s CSRZ-DPSK Transmission System with Signed Online Chromatic Dispersion Detection,” Proc. ECOC'03 Rimini, Italy 2 (2003) Tu3.6.4, pp. 268-269.
Swanson et al: “High Sensitivity Optically Preamplified Direct Detection DPSK Receiver with Active Delay-Line Stabilization,” IEEE Photonics Technology Letter, vol. 6, No. 2, Feb. 1994, pp. 263-265.

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

Optical transmission system, optical transmitter for optical... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical transmission system, optical transmitter for optical..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical transmission system, optical transmitter for optical... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2642203

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