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Authors: M. Galarza, K. De Mesel, S. Verstuyft, C. Aramburu, I. Moerman, P. Van Daele, R. Baets, M.Lopez-Amo
Title: Simple-to-fabricate and highly efficient spot-size converters using antiresonant reflecting optical waveguides
Format: International Conference Proceedings
Publication date: 1/2003
Journal/Conference/Book: Proceedings of SPIE
Volume(Issue): 4947 p.33-41
Location: San Jose, California, United States
Internal Reference: [N-245]

Abstract

We report on a new concept for InGaAsP-InP 1.55 um lasers with integrated spot-size converters based on antiresonant reflecting optical waveguides (ARROW). The mode expanders consist of al laterally tapered active region on top of a fiber-matched passive slab waveguide. The large slab mode is laterally confined by an antresonant configuration of a couple of lateral waveguides defined in the same fabrication process as the active ridge. This feature makes the presented spot-soze transformer as simple to fabricate as a standard waveguide, only requiring a planar growth step and a single-mode fibers from 8 to 4 dB. We also analyze by simulation two variants of the concept proposed in this work, including a taper structure for a buried waveguide, which are expected to show better performance. Simulation results show fiber-coupling efficiences as low as 2.4 adn 1.1 dB for both variants.


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