Silicon-wire-based ultrasmall lattice filters with wide free spectral ranges
2003; Optica Publishing Group; Volume: 28; Issue: 18 Linguagem: Inglês
10.1364/ol.28.001663
ISSN1539-4794
AutoresKoji Yamada, Tetsufumi Shoji, Tai Tsuchizawa, Toshifumi Watanabe, Junichi Takahashi, Sei-ichi Itabashi,
Tópico(s)Photonic Crystals and Applications
ResumoUsing silicon-on-insulator-based silicon-wire waveguides with submicrometer cross sections, we constructed ultrasmall channel-dropping lattice filters for 1.5-microm infrared systems. The waveguide's low-loss bends with 2.5-microm radius reduce the total length of the filter to less than 100 microm 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.
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