Directional coupling of optical signals by odd dark beams with mixed phase dislocations |
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| Authors: | D Neshev A Dreischuh GG Paulus H Walther |
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| Institution: | Sofia University, Dept. of Quantum Electronics, 5. J. Bourchier Blvd, 1164 Sofia, Bulgaria, BG
Max-Planck-Institut für Quantenoptik, Institut für Laserphysik, Hans-Korfermann-Str. 1, 85748 Garching, Germany, DE
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| Abstract: | 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 a reasonable coupling-to-cross-talk efficiency ratio, are
investigated. The parameters useful for performance optimization of the couplers are discussed.
Received: 19 July 2000 / Revised version: 5 February 2001 / Published online: 27 April 2001 |
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| Keywords: | PACS: 42 65 Tg 42 65 Wi |
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