Optical synchronous clock distribution network and high-speed si

Details Optical synchronous clock distribution network and high-speed si Optical synchronous clock distribution network and high-speed si

1994-04-29

1995-05-16

Ullah, Akm E.

Optical waveguides

Integrated optical circuit

359109, G02B 600, G02B 636

Patent

active

054168619

ABSTRACT:
An optical waveguide H-tree design is provided for global clock distribution on multichip modules (MCM) which has nearly zero clock skew and is useful for a distributed computer system environment. The optical waveguide H-tree design utilizes channel waveguides, curved sections and directional couplers formed using silica glass and silicon oxynitride (SiON) channel waveguide technologies. A hybrid combination of both SiON and silica glass is disclosed which has the advantages of each. The achievable clock speed is limited by the laser diode source and photodiode receiver at each chip module, and not by the optical waveguide distribution network. The high-speed optical waveguide can be configured to transmit clock signals, or for use as a multi-wavelength communication network that communicates signals to various integrated circuits (ICs) mounted on the multichip module. This is achieved using multiple laser diodes having different output wavelengths and directing their outputs into an optical multiplexer. At the receiving points on the ICs, optical demultiplexers filter the optical signals into individual output signals. In addition, multiple "stacked" optical waveguides can be constructed on the MCM to transmit multiple optical signals, and such optical signals can be either of single wavelength or multiple wavelength type.

REFERENCES:
patent: 4682323 (1987-07-01), Corfield et al.
patent: 4871224 (1989-10-01), Karstensen
patent: 5157461 (1992-10-01), Page
patent: 5255111 (1993-10-01), Kwa
patent: 5263111 (1993-11-01), Nurse et al.
patent: 5276745 (1994-01-01), Revelli, Jr.
Ahmed El-Amawy, "Clocking Arbitrarily Large Computing Structures Under Constant Skew Bound," IEEE Transactions on Parallel and Distributed Systems, vol. 4, No. 3, pp. 241-255, Mar., 1993.
Gail R. Lalk et al., "Board Level High Speed Photonic Interconnections: Recent System Developments," Optical Interconnects in the Computer Environment, SPIE vol. 1178, pp. 123-130, 1989.
Davis H. Hartman, "Digital High Speed Interconnects: A Study of the Optical Alternative," Optical Engineering, vol. 25, No. 10, pp. 1086-1102, Oct., 1986.
Allan L. Fisher et al., "Synchronizing Large VLSI Processor Arrays," IEEE Transactions on Computers, vol. C-34, No. 8, pp. 734-740, Aug. 1985.
Morteza Afghahi et al., "Performance of Synchronous and Asynchronous Schemes for VLSI Systems," IEEE Transactions on Computers, vol. 41, No. 7, pp. 858-872, Jul., 1992.
Andrew Kahng et al., "High Performance Clock Routing Based on Recursive Geometric Matching," 28th ACM/IEEE Design Automation Conference.RTM., UCLA Department of Computer Science, Los Angeles, Calif., pp. 322-327.
Toshikazu Sakano et al., "Multiprocessor System using an Automatically Rearrangeable Free-Space Multichannel Optical Switch: COSINE-2," Applied Optics, vol. 32, No. 20, pp. 3690-3699, Jul. 10, 1993.
Paola Cinato et al., "Optical Interconnections Within Multichip Modules," Optical Engineering, vol. 32, No. 4, pp. 852-860, Apr., 1993.
T. Tamir et al., "Analysis and Design of Grating Couplers," Applied Physics, Appl. Phys. 14:235-254 (1977), pp. 235-254.
J. W. Parker, "Espirt II Olives-A European Collaborative Programmed in Optical Interconnections," 1990 STC PLC, pp. 408-413.
Ren-Song Tsay, "An Exact Zero-Skew Clocking Routing Algorithm," IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, vol. 12, No. 2, pp. 242-249, Feb., 1993.
Victor Mizrahi et al., "Ultraviolet Laser Fabrication of Ultrastrong Optical Fiber Gratings and of Germania-Doped Channel Waveguides," Appl. Phys. Lett., vol. 63, No. 13, pp. 1727-1729, Sep. 27, 1993.
Meiliu Lu et al., "Analysis of Self-Stabilizing Clock Synchronization by Means of Stochastic Petri Nets," IEEE Transactions on Computers, vol. 39, No. 5, pp. 597-604, May, 1990.
Cheng-Sheng Li et al., "Fully Differential Optical Interconnections for High-Speed Digital Systems," IEEE Transactions on Very Large Integration (VLSD Systems), vol. 1, No. 2, pp. 151-163, Jun., 1993.
K. W. Jelley et al., "High-Speed Chip-to-Chip Optical Interconnect," IEEE Photonics Technology Letters, vol. 4, No. 10, pp. 1157-1159, Oct., 1992.
S. K. Tewksbury et al., "Opportunities and Issues for Optical Interconnects in Microelectronic Systems," Optoelectronics: Technologies and Applications, Chapter 11, pp. 232-263, SPIE.
Pradeep Lall et al., "An overview of Multichip Modules," Solid State Technology, pp. 65-76, Sep., 1993.
K. H. Calhoun et al., "Vertical Optical Communication Through Stacked Silicon Wafers Using Hybrid Monolithic Thin Film InGaAsP Emitters and Detectors", IEEE Photonics Technology Letters, vol. 5, No. 2, pp. 254-257, Feb. 1993.
Chung-Sheng Li et al., "Differential Board/Backplane Optical Interconnects for High-Speed Digital Systems, Part I: Theory," Journal of Lightwave Technology, vol. 11, No. 7, pp. 1234-1249, Jul., 1993.

Affiliated with

Also associated with

Rating

Optical synchronous clock distribution network and high-speed si does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical synchronous clock distribution network and high-speed si, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical synchronous clock distribution network and high-speed si will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-644565