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An energy‐efficient free‐space optical interconnection for clock distribution
Author(s) -
Tamil Lakshman S.,
Hsia Kangmin
Publication year - 1995
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.4650090109
Subject(s) - clock network , clock skew , clock domain crossing , digital clock manager , chip , skew , interconnection , clock gating , optics , physics , energy (signal processing) , computer science , electronic engineering , clock signal , synchronous circuit , engineering , telecommunications , jitter , quantum mechanics
An energy‐efficient free‐space clock‐distribution scheme for intrachip and chip‐to‐chip application is proposed here. The scheme involves two aspheric mirrors in confocal configuration. The length between the mirrors should be equal to the length traversed by an optical ray in one or an integer multiple of the clock period for ghost‐free clock reception. The proposed method reuses the unused optical energy of a clock pulse scattered over the nonphotodetector area of the chip by synchronously combining with the optical energy of the successive clock pulses. Zero clock skew can be achieved by this method. © 1995 John Wiley & Sons, Inc.