Abstract
An ultra-low-loss coupler for interfacing a silicon-on-insulator ridge waveguide and a single-mode fiber in both polarizations is presented. The inverted taper coupler, embedded in a polymer waveguide, is optimized for both the transverse-magnetic and transverse-electric modes through tapering the width of the silicon-on-insulator waveguide from 450 nm down to less than 15 nm applying a thermal oxidation process. Two inverted taper couplers are integrated with a 3-mm long silicon-on-insulator ridge waveguide in the fabricated sample. The measured coupling losses of the inverted taper coupler for transverse-magnetic and transverse-electric modes are ~0.36 dB and ~0.66 dB per connection, respectively.
Original language | English |
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Journal | Optics Communications |
Volume | 283 |
Issue number | 19 |
Pages (from-to) | 3678-3682 |
ISSN | 0030-4018 |
DOIs | |
Publication status | Published - 2010 |
Keywords
- integrated optics devices
- optical design
- fabrication waveguide