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http://dx.doi.org/10.3807/KJOP.2005.16.3.248

Compact Design and Fabrication of 'Improved QS-MMI' Demultiplexer  

Kim, Nam-Kook (School of Information and Communication Engineering, INHA University)
Kim, Jang-Kyum (School of Information and Communication Engineering, INHA University)
Choi, Chul-Hyun (School of Information and Communication Engineering, INHA University)
O, Beom-Hoan (School of Information and Communication Engineering, INHA University)
Lee, Seung-Gol (School of Information and Communication Engineering, INHA University)
Park, Se-Gun (School of Information and Communication Engineering, INHA University)
Lee, El-Hang (School of Information and Communication Engineering, INHA University)
Publication Information
Korean Journal of Optics and Photonics / v.16, no.3, 2005 , pp. 248-253 More about this Journal
Abstract
We designed and fabricated a compact multi-mode interference (MMI) wavelength demultiplexer using the concept of 'Improved Quasi-State' modes. The output power and extinction ratio were improved by utilizing modal phase error which is specially occurred in low-index contrast. For a designed demultiplexer, the mode propagation analysis with effective index approximation shows significant improvement of extinction ratio to -25 dB for both $1.31{\mu}m\;and\;1.51{\mu}m$ wavelength region and the split-length was reduced about 1/5 of other MMI devices. The fabricated device shows successful characteristics for both 1.31 and $1.55{\mu}m$ wavelengths. These results demonstrate the potential of low-index materials system and the embossing process for photonic integrated circuits.
Keywords
Integrated optics; Guided waves; Integrated optics devices;
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