Interferometric switch

Details Interferometric switch Interferometric switch

1996-06-27

1997-12-30

Ngo, John

Optical waveguides

With optical coupler

Switch

372 6, 385 14, 385 21, 385132, 385122, 385142, 385 42, G02B 626

Patent

active

057039755

ABSTRACT:
A compact monolithic interferometric switch such as a Mach-Zehnder switch is formed such that one of the waveguide paths between the input and output couplers contains a material having exhibits a resonant nonlinearity, whereby its refractive index changes when pump power propagates through it. Each of the waveguide paths has a different propagation constant whereby signal light is subjected to a different delay in each path when no pump power is propagating through the rare nonlinear path. An input signal applied to the input of the switch appears at a first output terminal when the pump power does not propagate through the nonlinear path, and it appears at a second output terminal when the pump power is applied to the nonlinear path. Switching occurs at relatively low levels of pump power.

REFERENCES:
patent: 4863230 (1989-09-01), Webb
patent: 4881788 (1989-11-01), Doran
patent: 5044715 (1991-09-01), Kawachi et al.
patent: 5148503 (1992-09-01), Skeie
patent: 5375010 (1994-12-01), Zervas et al.
patent: 5377284 (1994-12-01), Bulow

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