A novel compact wavelength-division multiplexer using highly dispersive waveguide-to-waveguide coupling

Tzong Yow Tsai, Zhi Cheng Lee, Yen Cheng Fang, Ming Hong Cha

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A novel compact wavelength-division multiplexer using highly dispersive waveguide-to-waveguide coupling is designed, simulated and analyzed. The device consists of two very close single-moded waveguides that are periodically connected to form a mode-dependent dispersive grating. It is demonstrated that the wavelengths over the edges of the photonic band gap contributed by the grating can be separated in a very short propagation distance. Using the finite-difference time-domain method, the result shows that the wavelengths of 1570 and 1530 nm are separated by the grating in a coupler length of 57 μm which is much shorter than the required length of about 340 μm without grating assistance. The channel contrast of 20 dB and the insertion loss about 2 dB are achieved.

Original languageEnglish
Pages (from-to)197-200
Number of pages4
JournalOptics Communications
Volume263
Issue number2
DOIs
Publication statusPublished - 2006 Jul 15

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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