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Journal Article
Enhancing Alignment Tolerance of Silicon Waveguide by using a Wide Grating Coupler
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- Authors
- Jong-Moo Lee, Kap-Joong Kim, Gyung Ock Kim
- Issue Date
- 2008-08
- Citation
- Optics Express, v.16, no.17, pp.13024-13031
- ISSN
- 1094-4087
- Publisher
- Optical Society of America(OSA)
- Language
- English
- Type
- Journal Article
- Project Code
- 07MB1500, Silicon-based high-speed optical interconnection IC, Kim Gyungock
- Abstract
- We fabricate a 20 μm wide grating coupler for a single-mode thermally-expanded-core (TEC) fiber, in order to enhance positional tolerance in alignment. The minimal coupling loss is measured at 5 dB per facet and the optical 3 dB bandwidth is measured at 40 nm. The 3 dB alignment tolerance is measured at 짹7.5 μm in horizontal direction and +290 μm in vertical direction. The 1 dB alignment tolerance is measured at 짹 4.2 μm in horizontal direction and +125 μm in vertical direction. The alignment tolerance is enhanced twice in horizontal direction and four times in vertical direction, compared with the coupling of a standard single-mode fiber to a standard 10 μm wide grating coupler which is also fabricated in this experiment. © 2008 Optical Society of America.
- KSP Keywords
- 3-dB bandwidth, 40 nm, Coupling loss, Silicon waveguide, Single-mode fiber(SMF), Standard single-mode fiber, alignment tolerance, grating coupler, positional tolerance