Modeling of a compact and completely non-blocking 4 × 4 multimode interference switch for optical communication applications

Ghanshyam K. Singh; Abhishek Goyal; Rajendra Prasad Yadav; Vijay Janyani

doi:10.1117/1.OE.51.5.055002

4 May 2012 Modeling of a compact and completely non-blocking 4 × 4 multimode interference switch for optical communication applications

Ghanshyam K. Singh, Abhishek Goyal, Rajendra Prasad Yadav, Vijay Janyani

Author Affiliations +

Optical Engineering, Vol. 51, Issue 5, 055002 (May 2012). https://doi.org/10.1117/1.OE.51.5.055002

Abstract

Modelling of a compact and completely non-blocking 4×4 optical switch utilizing integrated multi-mode interference (MMI) waveguides with a channel profile of Ti-indiffused Lithium Niobate is described. Design novelty lies in its satisfactory operation for two wide optical windows (100 nm each), with center wavelengths (λ_centre) of 1.3 and 1.55 µm, possessing low losses. For either of these windows, the average value of propagation losses are maintained lower than 1 dB with a vacillation of extremely low polarization dependent losses ( ≤ 0.15 dB). Index tuned regions are optimized to achieve average crosstalk levels better than -19 and -12 dB for its operation in the wavelength range of 1.25 to 1.35 µm and 1.50 to 1.60 µm, respectively. It is also observed that switch possess absolute loss uniformity (of the range of 0.5% to 1.6%) with a maximum of ±2.5% tolerance in the structural parameters.

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Ghanshyam K. Singh, Abhishek Goyal, Rajendra Prasad Yadav, and Vijay Janyani "Modeling of a compact and completely non-blocking 4 × 4 multimode interference switch for optical communication applications," Optical Engineering 51(5), 055002 (4 May 2012). https://doi.org/10.1117/1.OE.51.5.055002

Published: 4 May 2012

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