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http://dx.doi.org/10.3807/JOSK.2007.11.1.040

Design of a Taper-Underlaid Spot-Size Converter with an Offset  

Choi, Jun-Seok (Integrated optics laboratory, Department of Physics, Chonnam National University)
Oh, Jin-Kyong (Integrated optics laboratory, Department of Physics, Chonnam National University)
Lee, Dong-Hwan (Integrated optics laboratory, Department of Physics, Chonnam National University)
Lee, Hyung-Jong (Integrated optics laboratory, Department of Physics, Chonnam National University)
Kim, Sang-Duk (Department of Information communication, Dong-A College)
Publication Information
Journal of the Optical Society of Korea / v.11, no.1, 2007 , pp. 40-43 More about this Journal
Abstract
We propose a taper-underlaid spot-size converter (TU-SSC) with an offset which consists of two vertically stacked taper layers. The designed TU-SSC reduces coupling loss of a high index-contrast waveguide with $1.5%{\Delta}$ to a single mode fiber from 1.5 dB to 0.27 dB. We also considered the effects of mask misalignment in the fabrication process of TU-SSC, and optimized the design of TU-SSC so that the additional loss of TU-SSC for the mask misalignment of $3{\mu}m$ in the photo-lithography process was as low as 0.13 dB.
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