Optical communications – Multiplex – Optical switching
Reexamination Certificate
2007-05-29
2007-05-29
Tran, Dzung (Department: 2613)
Optical communications
Multiplex
Optical switching
C398S048000, C398S053000
Reexamination Certificate
active
10423979
ABSTRACT:
An optical time multiplexer for generating an N Gbits/s output signal (36) from n data modulated input pulse streams (21, 22) with a pulse frequency of N
GHz, where nεIN and n≧2, with a combiner device for passively interleaving the n input pulse streams (21, 22) is characterized by at least n−1 first phase shifting elements (25) tuning the optical phases of at least n−1 input pulse streams (22) and being connected to a controller device (32), which derives at least n−1 control signals from a comparison of the optical phases of the n input pulse streams (21, 22) and controls the at least n−1 first phase shifting elements (25) such that the optical phases of all n input pulse streams (21, 22) are locked with respect to each other. This optical time multuplexer reduces the drifting penalty of ODTM signals due to multiplexer instability, it prohibits the broadening of RZ pulses, and it grants the possibility to easily generate carrier-suppressed RZ signals or similar modulation formats.
REFERENCES:
patent: 4634858 (1987-01-01), Gerdt et al.
patent: 5050167 (1991-09-01), Izadpanah
patent: 5917628 (1999-06-01), Ooi et al.
patent: 6760524 (2004-07-01), Mukai
patent: 0438237 (1991-07-01), None
patent: 1119119 (2001-07-01), None
M. Nakazawa, et al.: “1.28Tbit/s-70km OTDM Transmission Using Third- and Fourth-Order Simultaneous Dispersion Compensation with a Phase Modulator”, Electronics Letters, Nov. 23, 2000, vol. 36, No. 24, pp. 2027-2028.
I. Morita et al: “Study on Optimum OTDM Signals for Long-Distance 40 Gbit/s Transmission”, OFC 2002, Tuesday Morning, pp. 5-6.
K-L Deng et al, “A 1024-Channel Fast Tunable Delay Line for Ultrafast All-Optical TDM Networks” , IEEE Photonics Technology Letters, IEEE, Inc., New York, US, vol. 9, No. 11, Nov. 1, 1997, . 1496-1498, XP000722982.
Q. Z. Liu, “10.6 Gbit/s 2:1 time division multiplexer using dual gage GaAs MESFETs”, Center for Broadband Telecommunications, XP010004589.
Alcatel
Sughrue & Mion, PLLC
Tran Dzung
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