Transmission wavelength shift of +36 nm observed with Ta2O5-SiO2 multichannel wavelength filters consisting of three-dimensional photonic crystals

H. Ohkubo, Y. Ohtera, S. Kawakami, T. Chiba

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

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 languageEnglish
Pages (from-to)1322-1324
Number of pages3
JournalIEEE Photonics Technology Letters
Volume16
Issue number5
DOIs
Publication statusPublished - 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

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