Nonlinear Y-junction waveguide structure

Details Nonlinear Y-junction waveguide structure Nonlinear Y-junction waveguide structure

1996-11-01

1998-10-13

Palmer, Phan T. H.

Optical waveguides

With optical coupler

Particular coupling structure

385122, 385 16, 385 48, G02B 626, G02B 642

Patent

active

058224807

ABSTRACT:
A nonlinear Y-junction waveguide structure includes a straight linear waveguide, and a nonlinear waveguide partially joined to the linear waveguide and bent through a desired angle at an output end portion thereof, whereby incident light coming into the linear waveguide travels mainly along the linear waveguide when it has a power lower than a predetermined level while traveling mainly along the nonlinear waveguide when it has a power not lower than the predetermined level. The nonlinear Y-junction waveguide structure has an increased branching angle as compared to the conventional completely-operating optical device and exhibits an abrupt switching phenomenon. Accordingly, it is possible to achieve an easy adjustment of the critical power. In this regard, there is no difficulty in the fabrication of the waveguide structure.

REFERENCES:
patent: 4860294 (1989-08-01), Winzer et al.
patent: 5463705 (1995-10-01), Clauberg et al.
The Nonlinear Coherent Coupler; Stephen M. Jensen; Oct. 1982; pp. 1580-1583.
Digital optical switch; Y. Silberberg, P. Perlmutter and J.E. Baran; Received 4 Jun. 1987; accepted for publication 24 Aug. 1987; pp. 1230-1232.
All-optical phase-and power-controlled switching in nonlinear waveguide junctions; Y. Silberberg and B.G. Sfez; Received Apr. 21, 1988; accepted Sep. 2, 1988; pp. 1132-1134.

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