Standing-wave, velocity-matched gate

Details Standing-wave, velocity-matched gate Standing-wave, velocity-matched gate

1980-06-23

1983-02-08

Lee, John D.

G02B 5174

Patent

active

043726437

ABSTRACT:
An ultrafast gate is produced by locally modulating the coupling along a pair of coupled wavepaths (11, 12) by means of a standing-wave electrical signal. By resolving the electrical signal into two, oppositely travelling waves propagating at the same velocity as the signal in the coupled wavepaths, it can be shown that the effect is to simulate an alternating .DELTA..beta. coupler. It is further shown that side lobes in the output signal can be reduced by tapering the coupling along the coupling interval.

REFERENCES:
patent: 4005927 (1977-02-01), Caton
patent: 4243295 (1981-01-01), Alferness
patent: 4251130 (1981-02-01), Marcatili
patent: 4262993 (1981-04-01), Burns et al.
Kogelnik et al., "Switched Directional Couplers With Alternating .DELTA..beta.", IEEE J. Q. E., vol. QE-12, No. 7, Jul. 1976, pp. 396-401.
Alferness, "Optical Directional Couplers With Weighted Coupling," A. P. L., vol. 35, No. 3, Aug. 1979, pp. 260-262.
Marcatili, "An Integrated-Optics Sub-Picosecond Gate," Int. & Guided Wave Optics Tech. Digest, Jan. 1980, Paper TUE3, 4 pages.
Marcatili, "Optical Subpicosecond Gate," Applied Optics, vol. 19, No. 9, May 1980, pp. 1468-1476.

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