Coded data generation or conversion – Analog to or from digital conversion – Using optical device
Reexamination Certificate
2009-12-14
2011-10-25
Jean Pierre, Peguy (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Using optical device,
C341S144000
Reexamination Certificate
active
08044835
ABSTRACT:
A modulator device for converting digital data into modulation of an optical signal includes an electronic input for receiving an input data word of N bits and an electrically controllable modulator for modulating the intensity of an optical signal, the modulator including M actuating electrodes where M≧N. An electrode actuating device, most preferably a digital-to-digital converter, operates actuating electrodes so that at least one electrode is actuated as a function of values of more than one bit of the input data word. According to an alternative, or supplementary, aspect of the invention, the set of electrodes includes at least one electrode having an effective area which is not interrelated to others of the set by factors of two. In one preferred implementation, a Mach-Zehnder modulator also provides phase modulation to give QAM functionality. Another implementation employs a semiconductor laser.
REFERENCES:
patent: 4288785 (1981-09-01), Papuchon et al.
patent: 7061414 (2006-06-01), Chen et al.
patent: 7203552 (2007-04-01), Solomon
patent: 7212292 (2007-05-01), Van Brocklin et al.
patent: 7792398 (2010-09-01), Tanaka et al.
patent: 0020216 (1980-05-01), None
patent: 0957596 (1999-11-01), None
patent: 1036302 (2004-03-01), None
patent: WO2004074914 (2004-09-01), None
Yacoubian et al. “Digital-to-analog conversion using electrooptic modulators” IEEE Photonics Technology Letters, vol. 15, pp. 117-119, Jan. 2003.
Leven et al. “A 12.5 gsamples/s optics digital-to analog converter with 3.8 effective bits”, Lasers and Electro-Optics Society, 2004.LEOS 2004. The 17th Annual Meeting of the IEEE, vol. 1, pp. 270-271, Nov. 2004.
Vawter G A et al:“Digital Optical Phase Control in Ridge-Waveguide Phase Modulators” IEEE Photonics Technology Letters, IEEE Service Center, Piscataway, NY, US, vol. 5, No. 3, Mar. 1, 1993, pp. 313-315.
M. Papuchon et al. “Bits Digital Druven Integrated Amplitude Modulator for Data Processing”, Electronics Letters, Feb. 14, 1980, vol. 16, No. 4 pp. 142-144.
Amrani Ofer
Ehrlichman Yossef
Ruschin Shlomo
Friedman Mark M.
Jean Pierre Peguy
Ramot at Tel Aviv University Ltd.
LandOfFree
Linearized optical digital-to-analog modulator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Linearized optical digital-to-analog modulator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Linearized optical digital-to-analog modulator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4270692