Optical communications – Transmitter and receiver system – Including compensation
Reexamination Certificate
2006-07-05
2009-10-27
Tran, Dzung D (Department: 2613)
Optical communications
Transmitter and receiver system
Including compensation
C398S032000, C398S053000
Reexamination Certificate
active
07609974
ABSTRACT:
An optical transmitter generates a transmission signal having a frame as a unit, the frame including a signal pilot signal with fixed amplitude and phase and two data bits to output the generated signal into a transmission line. In a receiver, a splitter splits the signal light from the transmission line. An optical delay delays the signal light for a 1-bit period. A first combiner combines the signal light from the transmission line and the output signal light from the optical delay. A photodetector converts the combined light into an electrical signal. A 3-bit optical delay, a second combiner, a BPF, and an oscillator generate a frame-timing signal. A gate separates a data from the output from the photodetector under the control of a gate control unit. A binary discriminator binary-discriminates the output signal from the gate.
REFERENCES:
patent: 4899367 (1990-02-01), Sampei
patent: 6356555 (2002-03-01), Rakib et al.
patent: 2003/0156603 (2003-08-01), Rakib et al.
patent: 2004/0213566 (2004-10-01), Takanashi et al.
patent: WO 03/000008 (2003-01-01), None
K. Kikuchi, et al., “Degradation of Bit-Error Rate in Coherent Optical Communications Due to Spectral Spread of the Transmitter and the Local Oscillator,” IEEE/USA Journal of Lightwave Technology, vol. LT-2, No. 6, pp. 1024-1033, Dec. 1984.
R. A. Griffin, et al., “10 Gb/s Optical Differential Quadrature Phase Shift Key (DQPSK) Transmission using GaAs/A1GaAs Integration,” Proc of OFC 2002 Postdeadline Papers, FD6-1 to FD6-3, Mar. 2002.
B. Wandernoth, “1064 nm, 565 Mbit/s PSK Transmission Experiment with Homodyne Receiver Using Synchronisation Bits,” Electronics Letters, vol. 27 No. 19, pp. 1692-1693, Sep. 12, 1991.
S. Tsukamoto, et al., “Coherent Demodulation of 40-Gbit/s Polarization-Multiplexed QPSK Signals with 16-GHz Spacing after 200-km Transmission,” Proc of OFC 2005, PDP29, Mar. 2005.
T. Miyazaki, “PSK Self-Homodyne Detection Using a Pilot Carrier for Multibit/Symbol Transmission With Inverse-RZ Signal,” IEEE Photonics Technology Letters, vol. 17, No. 6, pp. 1334-1336, Jun. 2005.
European Search Report dated Oct. 4, 2006, for EP 06114129.7, in the name of National Institute of Information and Communications Technology Incorporated Administrative Agency, 6 pages.
Kamio Yukiyoshi
Miyazaki Tetsuya
Christie Parker & Hale LLP
National Institute of Information and Communications Technology
Tran Dzung D
LandOfFree
Data transmission method and a system thereof does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Data transmission method and a system thereof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data transmission method and a system thereof will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4118939