Constructing method for an optical passive component

Details Constructing method for an optical passive component Constructing method for an optical passive component

2005-01-11

2005-01-11

Ullah, Akm Enayet (Department: 2874)

Optics: measuring and testing

By light interference

Using fiber or waveguide interferometer

C385S027000, C398S082000

Reexamination Certificate

active

06842253

ABSTRACT:
The present invention relates to a constructing method and device for an optical passive component by using an improved structure of a Mach-Zehnder interferometer. This improved structure of the Mach-Zehnder interferometer is composed of two MMI beam splitters, a curved channel waveguide and a periodic segment waveguide for being separately used as the beam-splitting components, the curved arm and the straight arm of the Mach-Zehnder interferometer. In the inventive MMI beam splitter, a sub-area in the MMI waveguide is a periodic segment waveguide having a plurality of segments. By adjusting the number of the segments of the periodic segment waveguide in the MMI waveguide, the beam-splitting ratio of the MMI beam splitter can be arbitrarily adjusted. By adjusting the segment period and the duty cycle of the straight arm of the Mach-Zehnder interferometer, the required length of the straight arm can be efficiently shortened.

REFERENCES:
patent: 6445477 (2002-09-01), Madsen et al.
patent: 6587616 (2003-07-01), Augustsson
patent: 6614213 (2003-09-01), Whitbread et al.

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