Optical waveguides – Integrated optical circuit
Reexamination Certificate
2006-06-14
2008-08-05
Pak, Sung H (Department: 2874)
Optical waveguides
Integrated optical circuit
Reexamination Certificate
active
07409120
ABSTRACT:
Interference caused by the propagation of a transmit signal transmitted from a transmit antenna to a receive antenna is effectively cancelled by an improved signal cancellation system. The system includes an interference cancellation signal generator that generates a time-delayed and amplitude-reduced representation of said transmit signal. A summing stage is operably coupled to the interference cancellation signal generator and the receive antenna. The summing stage subtracts the time-delayed and amplitude-reduced representation of the transmit signal from a receive signal to substantially cancel the interference. The interference cancellation signal generator preferably includes a novel programmable optical delay line that introduces a variable amount of optical delay to an optical signal derived from said transmit signal in addition to a thyristor-based sigma delta modulator that converts samples of the transmit signal to into a digital signal in the optical domain.
REFERENCES:
patent: 5222162 (1993-06-01), Yap et al.
patent: 5565867 (1996-10-01), Tiemann
patent: 6031243 (2000-02-01), Taylor
patent: 6094458 (2000-07-01), Hellberg
patent: 6781533 (2004-08-01), Yap et al.
patent: 2002/0150368 (2002-10-01), Imoto
patent: 03109528 (1991-05-01), None
patent: WO 02/071490 (2002-09-01), None
patent: WO 2004/038812 (2004-05-01), None
“Analog-to-Digital Converter Architectures and Choices for System Design”; by Brian Black, Analog Dialogue 33-8 (1999).
“A Brief Introduction to Sigma Delta Conversion”, by David Jarman, Intersil Publication, May 1995.
“Polymer-Based Optical Waveguid Circuits for Photonic Phased Array Antennas” by Sunning Tang, L. Wu, Z. Fu, D. An, Z. Han, and Ray T. Chen; Jan. 1999; Part of the SPIE Conference on Optoelectronic Interconnects VI.
“High Resolution Signal Conditioning ADC's” by Walt Kester, James Bryant, and Joe Buxton, 1996.
“Synthesis and Analysis of Sigma-Delta Modulators Employing Continuous-Time filters” by Philippe Benabes, Mansour Keramat, and Richard Kielbasa, Analog Integrated Circuits and Signal Processing, May 2000.
Optical Components for WDM Lightwave Networks M.S. Borella,J.P. Jue, D.Banerjee, B.Ramamurthy and B. Mukherjee, Proceedings of the IEEE, vol. 85 No. 8, pp. 1274-1307 Aug. 1997.
Integrated Inversion Channel Optoelectroic Devices and Circuit Elements for Multifunctional Array Applications G.W. Taylor et al., IEEE Journal of Quantum Electronics, vol. 29 No. 2, Feb. 1993.
“Three-Terminal Operation of the Double-Heterostructure Optoelectroic Switching Laser”, G.W. Taylor, P.R. Claisse, P. Cooke, AT&T Laboratories, Mar. 30, 1991.
“A Quantum-Well Inversion Channel Heterostructure as a Multifunctional Component for Optoelectronic Integrated Circuits”, Sargood, Taylor, Claisse, Vang, Cooke, Doctor, Kiely, Burrus, IEEE 1993.
“Demonstration of an Optoelectronic 4-bit Analog-to-Digital Converter Using a Thyristor Smart Comparator”, J. Cai, G.W. Taylor, Optics Communications, Oct. 1, 2000, pp. 79-88.
“Monolithic Integration of Lasers with FET and Bipolar Transistors in Inversion Channel Technology”, A. Evaldsson, T.A. Vang, G.W. Taylor, P.A. Evaldsson, and P. Cooke, Electronic Letters, Jan. 1993, pp. 60-62.
“Small Signal Model and High-Frequency Performance of the BICFET”, G.W. Taylor, John G. Simmons, Nov. 1985 IEEE.
“Heterostructure field-effect transistor optical mudulator in the InGaAs/A1GaAs material system”, Applied Physics Letters, Nov. 16, 1992.
Cai Jianhong
Taylor Geoff W.
Upp Daniel C.
Gordon & Jacobson, PC
Opel, Inc.
Pak Sung H
The University of Connecticut
LandOfFree
Integrated circuit for programmable optical delay does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Integrated circuit for programmable optical delay, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Integrated circuit for programmable optical delay will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3995900