Abstract
We have developed multichannel wavelength filters consisting of three-dimensional photonic crystals, which have multiple filter regions with difference transmission wavelengths according to differences in the in-plane lattice constants of the crystals. In this study, we improved the design of the photonic crystal (PC) filters by making use of the photonic-bandgap edge and fabricated PC filters with a Ta2O5-SiO2 material system. This improvement enabled us to obtain a transmission wavelength shift of +36 nm at 1550 nm, which agrees well with the results of finite-difference time-domain simulations. By connecting the multichannel wavelength filters to a 100-GHz-spaced 40-channel arrayed waveguide grating (AWG), we suppressed the crosstalk in the AWG from -40 dB to less than -60 dB.
Original language | English |
---|---|
Pages (from-to) | 1322-1324 |
Number of pages | 3 |
Journal | IEEE Photonics Technology Letters |
Volume | 16 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2004 May 1 |
Keywords
- Bandpass filters
- Cavity resonators filters
- Finite-difference time-domain (FDTD) methods
- Gratings
- Optical crosstalk
- Wavelength-division multiplexing (WDM)
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering