Experimental demonstration of wideband dispersion-compensated slow light by a chirped photonic crystal directional coupler
Open Access
- 1 January 2007
- journal article
- Published by Optica Publishing Group in Optics Express
- Vol. 15 (9) , 5264-5270
- https://doi.org/10.1364/oe.15.005264
Abstract
We report on the fabrication and evaluation of a directional coupler consisting of two different chirped photonic crystal (PC) waveguides that can generate wideband, low dispersion slow light. The directional coupler was fabricated from a silicon-on-insulator PC slab with airhole diameter chirping. For both waveguides, we observed a group index of 60–80 near the photonic band edge and opposite dispersion characteristics. In the directional coupler, we evaluated a group index of 30–40 in a wavelength bandwidth of 32 nm. The experimental results agree with the theoretical relation between the group index and bandwidth.Keywords
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