Integrated optical devices design by genetic algorithm

Sanchis, L.; Håkansson, A.; López-Zanón, D.; Bravo-Abad, J.; Sánchez-Dehesa, José
May 2004
Applied Physics Letters;5/31/2004, Vol. 84 Issue 22, p4460
Academic Journal
In this work, we use multiple scattering in conjunction with a genetic algorithm to reliably determine the optimized photonic-crystal-based structure able to perform a specific optical task. The genetic algorithm operates on a population of candidate structures to produce new candidates with better performance in an iterative process. The potential of this approach is illustrated by designing a spot size converter that has a very low F number (F=0.47) and a conversion ratio of 11:1. Also, we have designed a coupler device that introduces the light from the optical fiber into a photonic-crystal-based waveguide with a coupling efficiency over 87% for a wavelength that can be tuned to 1.5 μm. © 2004 American Institute of Physics.


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