Optical waveguides – With optical coupler – Switch
Patent
1994-08-15
1995-10-03
Gonzalez, Frank
Optical waveguides
With optical coupler
Switch
385 17, 385 20, 385 25, G02B 626
Patent
active
054558786
ABSTRACT:
An optical time delay device includes a switching component butt-coupled to one or two delay line components. The switching component is a planar substrate with an optical waveguide switching array formed thereon. The delay line component is a second planar substrate with a plurality of optical waveguides of different optical lengths. The input ends and output ends of the waveguides are disposed along the butt-coupled edge of the second substrate. The waveguides and switches are arranged so that the switches direct an incoming optical signal to a selected one or more of said waveguides. In a preferred embodiment, one of the waveguides has an optical length .DELTA.L, and the remaining waveguides have optical lengths which are multiples of .DELTA.L. The use of planar substrates with electro-optic and passive waveguide circuits allows for a modular approach, with interchangeable delay line components chosen for a particular application and butt-coupled to the switching component.
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Switched Optical Delay-Line Signal Processors, R. Ian MacDonald Published in Journal of Lightwave Technology, vol. LT-5 No. 6, Jun. 1987.
Gonzalez Frank
Redman Mary Y.
The Boeing Company
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