TY - JOUR
T1 - Transmission wavelength shift of +36 nm observed with Ta2O5-SiO2 multichannel wavelength filters consisting of three-dimensional photonic crystals
AU - Ohkubo, H.
AU - Ohtera, Y.
AU - Kawakami, S.
AU - Chiba, T.
N1 - Funding Information:
Manuscript received December 11, 2003; revised February 4, 2004. This work was supported in part by the Special Correlation Funds for Promoting Science and Technology from MEXT. Part of this study was done at the Venture Business Laboratory at Tohoku University. H. Ohkubo and Y. Ohtera are with NICHe, Tohoku University, Sendai 980-8579, Japan (e-mail: ohkubo@niche.tohoku.ac.jp). S. Kawakami is with NICHe, Tohoku University, Sendai 980-8579, Japan, and also with Photonic Lattice Inc., c/o NICHe, Tohoku University, Sendai 980-8579, Japan. T. Chiba is with Hitachi Cable, Ltd., Hitachi 319-1414, Japan. Digital Object Identifier 10.1109/LPT.2004.826232
PY - 2004/5
Y1 - 2004/5
N2 - 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.
AB - 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.
KW - Bandpass filters
KW - Cavity resonators filters
KW - Finite-difference time-domain (FDTD) methods
KW - Gratings
KW - Optical crosstalk
KW - Wavelength-division multiplexing (WDM)
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U2 - 10.1109/LPT.2004.826232
DO - 10.1109/LPT.2004.826232
M3 - Article
AN - SCOPUS:2442495068
VL - 16
SP - 1322
EP - 1324
JO - IEEE Photonics Technology Letters
JF - IEEE Photonics Technology Letters
SN - 1041-1135
IS - 5
ER -