Tunable Wavelength-Selective Liquid Crystal Filters for 600-Channel FDM System

Katsuhiko Hirabayashi, Hiroyuki Tsuda, Takashi Kurokawa

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


A tunable wavelength-selective filter is described that is capable of selecting one from over 600 channels at the wavelength of 1.47-1.60 μm, by stacking two liquid crystal Fabry-Perot interferometers, one with a wide tuning range of 127 nm and a broad bandwidth of 3.4 nm and the other with a very narrow bandwidth of 0.07 nm (9 GHz) and a small tuning range of 12 nm. This filter has an efficient finesse of 1800 and it can select one channel from 600 light sources with 0.2 nm (25 GHz) spacing at a beam optics loss of 5 dB.

Original languageEnglish
Pages (from-to)597-599
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number6
Publication statusPublished - 1992 Jun
Externally publishedYes

ASJC Scopus subject areas

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


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