Regensburg 2010 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 6: Nanophotonics - Devices I (Focused Session together with DS)
HL 6.1: Topical Talk
Montag, 22. März 2010, 10:15–10:45, H2
Tunable Hollow Waveguides and Their Device Applications — •Fumio Koyama — P&I Laboratory, Tokyo Institute of Technology, 4259-R2-22, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
We proposed a tunable hollow optical waveguide with a variable air core toward a new class of photonic integrated circuits. We present various unique features in hollow waveguides and the combination with microelectro-mechanical system (MEMS). We describe the design and fabrication of tunable hollow waveguides with a variable air core. We demonstrated low loss and polarization insensitive waveguides. The result shows a possibility of a giant change of over ∼ 10% in propagation constant with a variable air core. We also present a wide variety of device applications based on hollow waveguides, which include tunable Bragg reflectors, tunable lasers, dispersion compensators and so on. In particular, a hybrid-integrated tunable in-plane laser based on HCG-DBR hollow waveguide was demonstrated. A giant tuning range of 52 nm in wavelength has been demonstrated with SMSR of 30 dB. An expected advantage of HWG laser can be its athermal operation resulting from the air-core guiding. A fully monolithic version of the presented device with MEMS tuning can solve alignment issues to offer further large tuning range. Their simplicity and scalability may open up applications in large-scale photonic integration and in realizing other optical functions.
This document was translated from LATEX by HEVEA.