Planarized Optical Clock Signal Distribution on Si

Period of Performance: 11/15/1995 - 11/15/1997


Phase 2 SBIR

Recipient Firm

Radiant Research, Inc.
3006 Longhorn Blvd, Suite 105
Austin, TX 78758
Principal Investigator

Research Topics


Phase I demonstrated Si-based 7.5 GHz optical clock signal distribution using both Si waveguiding plates and Si/Ge waveguides. Phase II will develop a planarized grating coupler to provide surface-normal coupling from vertical cavity surface-emitting lasers to Si/Ge and polymer-based waveguides. Coupling from waveguides to Si-based photoreceivers will also be demonstrated. Si and SixGe1-x/Si photodetectors will be investigated. Full process compatibility with Si CMOS fabrication will be demonstrated. A drastically new synchronous optical clock signal distribution involving multiple MCMs will be carried out. This system clock demonstration will be technically and/or financially co-sponsored by GE, Honeywell, Cray Research, MCC, ATI, Roitech and State of Texas. The proposed technology is pivotal for the success of the realization of a high speed network which is the foundation for national information infrastructure (NII). The proposed technology and architecture have the highest commercial value in MCM and back plane interconnections. It is expected that the first planarized optical bus coupler will be developed with full compatibility with Si CMOS technology.