Directional coupling of optical signals by odd dark beams with mixed phase dislocations

Details Directional coupling of optical signals by odd dark beams with mixed phase dislocations Directional coupling of optical signals by odd dark beams with mixed phase dislocations

2000-07-20

arxiv.org/abs/nlin/0007026v1

Nonlinear Sciences

Pattern Formation and Solitons

6 pages, 5 figures, 2 tables, submitted to Appl. Phys. B

Scientific paper

Numerical simulations on the evolution of step-screw and edge-screw optical phase dislocations in bulk saturable self-defocusing nonlinear media are presented, with emphasis on their ability to induce steering waveguides for signal beams (pulses). Two schemes for directional coupling of such signals, both ensuring reasonable coupling-to-cross-talk efficiency ratio, are investigated. The parameters useful for performance optimization of the couplers are discussed.

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