Tunable external cavity laser with a liquid-crystal subwavelength resonant grating filter as wavelength-selective mirror

Allan S.P. Chang, Hua Tan, Shufeng Bai, Wei Wu, Zhaoning Yu, Stephen Y. Chou

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

We demonstrate a tunable external cavity laser consisting of a voltage-tuned liquid-crystal cladded subwavelength resonant grating filter placed directly in front of a semiconductor laser gain chip. The filter acts as a tunable wavelength-selective mirror. As the applied voltage to the filter changes from 0 to 22 V, the laser wavelength demonstrates a tuning range of 7 nm, which may be further increased. As the laser has simple cavity design and no moving parts, it can be low cost and easy to fabricate and assemble.

Original languageEnglish (US)
Pages (from-to)1099-1101
Number of pages3
JournalIEEE Photonics Technology Letters
Volume19
Issue number14
DOIs
StatePublished - Jul 15 2007

All Science Journal Classification (ASJC) codes

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

Keywords

  • Gratings
  • Resonant waveguide grating filter
  • Semiconductor lasers
  • Tunable lasers

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