Optical waveguides – Integrated optical circuit
Patent
1995-08-03
1997-03-11
Palmer, Phan T. H.
Optical waveguides
Integrated optical circuit
385 45, 385 11, 385 31, 385 24, G02B 612
Patent
active
056110073
ABSTRACT:
An integrated optical Mach-Zehnder interferometer has two arms (11, 12) having different geometric path lengths. A first arm 11 includes arcuate segments (113, 114, 115, 116) and linear segments (111, 112) and the second arm 12 includes a mirror image arcuate segment (123, 124, 125, 126) for each arcuate segment of the first arm 11 and the total length of the straight segments (121) of the second arm 12 is less than the total length of the straight segments (111, 112) of the first arm 11. The integrated optical Mach-Zehnder interferometer is used as a demultiplexer with a 2.times.2 coupler at the output and as a multiplexer with a reversed beam path. The phase difference of both arms is directly proportional to the difference of the geometric path lengths.
REFERENCES:
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patent: 4674827 (1987-06-01), Izutsu et al.
patent: 5035734 (1991-07-01), Honkanen et al.
patent: 5078516 (1992-01-01), Kapon et al.
patent: 5119447 (1992-06-01), Trisno
patent: 5418868 (1995-05-01), Cohen et al.
"Channel waveguide Mach-Zehnder interferometer for wavelength splitting and combining" by A. Tervonen et al, Conference of Microoptics, ECO, Mar. 1991 .
Fabricius Norbert
Wolf Barbara
IOT Integrierte Optil GmbH
Ottesen Walter
Palmer Phan T. H.
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