Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1996-09-30
1998-11-24
Lefkowitz, Edward
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359139, 359140, H04J 1408
Patent
active
058415602
ABSTRACT:
An optical data compressor includes a sequence of N compression stages for compressing a pulse train having a repetition time T and a repetition rate f to a pulse train having a repetition time t, where t is much less than T. Each compression stage includes a first optical path with a first gate and a delay element exhibiting a time delay (T-t)j, where j is a sequence number of the respective compression stage. The optical data compressor further includes: a second optical path with a second gate; a first coupler for inducing the pulse train onto the first and second optical paths; and a gating signal generator that is synchronized with the pulse train. The gating signal generator applies gating
on-gating signals, at a repetition rate of f/2.sup.j, to the first gate and complementary non-gating/gating signals having a repetition rate of f/2.sup.j to the second gate. A second coupler combines outputs from the first and second optical paths and applies the combined optical output to a next in the sequence the N compression stages, if any.
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patent: 5099471 (1992-03-01), Tsukada et al.
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patent: 5450225 (1995-09-01), Bostica et al.
patent: 5574586 (1996-11-01), Chu et al.
Electronics Letters, Nov. 6, 1986, vol. 22, No. 23, pp. 1218-1219, "TDMA Fibre-Optic Network with Optical Processing".
IEEE Photonics Technology Letters, Aug. 1993, vol. 5, No. 8, pp. 905-907, Yin-Chen Lu et al., "A Directly Modulated Pulse-Compressed and Time-Multiplexed Optical Source for High-Speed Multiple-Access Networks".
Journal of Lightwave Technology, Feb. 1992, vol. 10, No. 2, pp. 265-272, Yoshihiro Shimazu et al., "Ultrafast Photonic ATM Switch with Optical Output Buffers".
Lefkowitz Edward
The Trustees of Princeton University
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