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Phase-locked arrays of antiguides: model content and discrimination

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4 Author(s)
Botez, D. ; TRW, Redondo Beach, CA, USA ; Mawst, L.J. ; Peterson, G.L. ; Roth, T.J.

Three classes of array modes of closely spaced antiguides are analyzed: coupled fundamental (element) modes, coupled first-order (element) modes, and modes adjacent to coupled fundamental modes. The behavior of coupled fundamental modes as a function of lateral index step is analyzed and explained from a ray-optics point of view. It is found that at resonance, for both coupled fundamental and first-order modes, the array-mode propagation constant is virtually identical to the propagation constant of the mode of a single, unperturbed antiguide. Several types of mode discrimination mechanisms are discussed. For devices with 3-μm-wide antiguide cores and 1-μm interelement spacing, intermodal discrimination values of 15-20 cm-1 can be achieved. Excellent agreement is found between experimental data and theoretical predictions based on the effective-index method

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Quantum Electronics, IEEE Journal of  (Volume:26 ,  Issue: 3 )