Journal
OPTICS LETTERS
Volume 28, Issue 18, Pages 1663-1664Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.28.001663
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Using silicon-on-insulator-based silicon-wire waveguides with submicrometer cross sections, we constructed ultrasmall channel-dropping lattice filters for 1.5-/mum infrared systems. The waveguide's low-loss bends with 2.5-mum radius reduce the total length of the filter to less than 100 mum and enlarge the free spectral range to more than 80 nm. The measured spectra show fine channel-dropping characteristics, and the results agree well with numerical predictions. Moreover, we have succeeded in tuning the dropping wavelength by adjusting the lengths of the delay lines. (C) 2003 Optical Society of America.
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