Optical communications – Transmitter – Having particular modulation
Reexamination Certificate
2006-10-03
2006-10-03
Leung, Christina Y. (Department: 2613)
Optical communications
Transmitter
Having particular modulation
C398S188000
Reexamination Certificate
active
07116917
ABSTRACT:
The present invention suppresses to a minimum the degradation of the transmission quality caused by chromatic dispersion characteristic of an optical transmission medium, and the interplay between the chromatic dispersion and non-linear optical effects in dense WDM transport systems. A baseband input data signal is pre-coded in advance by a pre-coding unit, phase modulation is carried out using a pre-coded signal by the optical phase modulating unit, and the phase modulated optical signal is converted to an RZ intensity modulated signal by the optical filter unit that performs phase-shift-keying to amplitude-shift-keying conversion. For example, an optical phase modulating unit generates an encoded DPSK phase modulated signal using a differential phase shirt keying (DPSK) format, and a phase modulated signal is converted to an RZ intensity modulated signal by the optical filter unit disposed downstream of the optical phase modulating unit.
REFERENCES:
patent: 5543952 (1996-08-01), Yonenaga et al.
patent: 5917638 (1999-06-01), Franck et al.
patent: 6330375 (2001-12-01), Fishman et al.
patent: 6381048 (2002-04-01), Chraplyvy et al.
patent: 6559996 (2003-05-01), Miyamoto et al.
patent: 2002/0196508 (2002-12-01), Wei et al.
patent: 0 825 733 (1998-02-01), None
patent: 61-169034 (1986-07-01), None
patent: 06-053904 (1994-02-01), None
patent: 2000-059300 (2000-02-01), None
patent: 2000-106543 (2000-04-01), None
patent: 2000-156665 (2000-06-01), None
patent: 2001-244894 (2001-09-01), None
patent: 2001-251250 (2001-09-01), None
patent: 2002-023121 (2002-01-01), None
patent: 2001-147411 (2002-05-01), None
Y. Miyamoto et al., “Duobinary carrier-suppressed return-to-zero format and its application to 100GHz-spaced 8x43-Gbit/s DWDM unrepeatered transmission over 163 km”, Tech. Digest of OFC2001, paper TuU4, 2001.
T. Miyamoto et al., “Suppression of degradation induced by SPM/XPG+GVM in WDM transmission using a bit-synchronous intensity modulated DPSK signal”, Digest of OECC2000, paper 14D3-3, pp. 580-581, Jul. 2002.
K. Noguchi et al., “LiNbO3high-speed modulator”, Tech. Dig. Of CLEO Pacific Rim '99, paper FS2, pp. 1267-1268, 1999.
K. Sato et al., “Dual mode operation of semiconductor mode-locked lasers for anti-phase pulse generation”, OFC'2000, 320/Th W3-1, 2000.
H. Takahasi et al., “Transmission characteristics of arrayed waveguide N×N wavelength multiplexer”, IEEE J. Lightwave Technol., vol. 13, No. 3, pp. 447-455, 1995.
Y. Miyamoto et al., “100 Ghz-spaced 8×43 Gbit/s DWDM unrepeatered transmission over 163km using duobinary-carrier-suppressed return-to-zero format”, Electronics Letters, vol. 37, No. 23, Nov. 2001.
Miyamoto et al., “S-band 3×120-km DSF transmission of 8×42.7-Gbit/s DWDM duobinary carrier-suppressed RZ signals generated by novel wideband PM/AM conversion”, OAA2001, Post Deadline Paper, Jul. 2001.
First Office Action for Chinese Patent Application No. 02123164.8 issued on Jul. 22, 2005.
English Translation of Excerpts from Japanese Office Action regarding the Examiner's Comments mailed Oct. 18, 2005.
Akio Konishi et al., 3.24 Tbit/s carrier suppressed RZ transmission using a single supercontinuum source, The Institute of Electronics, Information and Communication Engineers (IEICE), Proceedings of the 2001 IEICE Society Conference, Aug. 29, 2001, B-10-86, p. 424.
Y. Miyamoto et al, Duobinary carrier-suppressed return-to-zero format and its application to 100GHz-spaced 8×43-Gbit/s DWDM unrepeatered transmission over 163 km, Optical Fiber Communication Conference (OFC), Technical Digest Postconference Edition, Anaheim, CA, Mar. 17-22, 2001, Trends in Optics and Photonics Series, Tops, vol. 54, Washington, WA: OSA, US, vol. 2, Mar. 17, 2001, p. TuU4-1.
K. Fukuchi, et al, 10 Gbit/s-120 km standard fiber transmission employing a novel optical phase-encoded intensity modulation for signal spectrum compression, Conference on Optical Fiber Communications, Dallas, Feb. 16-21, 1997, New York, IEEE, US, Feb. 16, 1997, p. 270-271.
K. Takayama, et al, An All-Optical 10-GHzLD-Based Clock Regenerator Using a Mach-Zehnder-Interferometer-Type NRZ-to-RZ Converter, IOOC-ECOC, European Conference on Optical Communication ECOC, International Conference on Integrated Optics and Optical Fiber Communication IOOC, vol. 1, 1991, p. 77-80.
T. Miyano et al, Suppression of Degradation Induced by SPM/XPM+GVD in WDM Transmission Using a Bit-Synchronous Intensity Modulated DPSK Signal, Technical Digest, Optoelectronics and Communications Conference, Proceedings of OECC, Jul. 2000, p. 580-581.
Hirano Akira
Kuwahara Shoichiro
Miyamoto Yutaka
Tomizawa Masahito
Darby & Darby
Leung Christina Y.
Nippon Telegraph and Telephone Coproration
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