Optical communications – Multiplex – Wavelength division or frequency division
Reexamination Certificate
2005-06-14
2005-06-14
Negash, Kinfe-Michael (Department: 2633)
Optical communications
Multiplex
Wavelength division or frequency division
C398S091000, C398S141000, C398S154000, C398S164000, C385S014000
Reexamination Certificate
active
06907198
ABSTRACT:
A high-speed and small-sized optical interconnection device uses wavelength-multiplexed light suitable therefor in order to make compatible between an increase in high-speed communication capacity of the optical interconnection device and an increase in high-speed communication distance thereof. A signal processing LSI is placed within a central portion of a main surface of a semiconductor substrate, and input/output units for transmitting and receiving optical wavelength-multiplexed lights are multi-chip integrated on the periphery of the main surface of the semiconductor substrate into a single package, and a wiring length can be reduced and a physical signal band for each connecting wiring can be enlarged. Further, the signal processing LSI is made up of CMOS and a driver circuit for each optical transmitting/receiving element is comprised of a Si—Ge transistor circuit, whereby a modulated signal band can be enlarged and the performance of the input/output optical signals from the device can be improved.
REFERENCES:
patent: 5394489 (1995-02-01), Koch
Antonelli Terry Stout & Kraus LLP
Negash Kinfe-Michael
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