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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 12, Iss. 24 — Nov. 29, 2004
  • pp: 5857–5871

All-optical modulation in dye-doped nematic liquid crystal photonic bandgap fibers

Thomas Tanggaard Alkeskjold, Jesper Lægsgaard, Anders Bjarklev, David Sparre Hermann, Anawati, Jes Broeng, Jun Li, and Shin-Tson Wu  »View Author Affiliations

Optics Express, Vol. 12, Issue 24, pp. 5857-5871 (2004)

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Photonic crystal fibers (PCFs) have attracted significant attention during the last years and much research has been devoted to develop fiber designs for various applications, hereunder tunable fiber devices. Recently, thermally and electrically tunable PCF devices based on liquid crystals (LCs) have been demonstrated. However, optical tuning of the LC PCF has until now not been demonstrated. Here we demonstrate an all-optical modulator, which utilizes a pulsed 532nm laser to modulate the spectral position of the bandgaps in a photonic crystal fiber infiltrated with a dye-doped nematic liquid crystal. We demonstrate a modulation frequency of 2kHz for a moderate pump power of 2–3mW and describe two pump pulse regimes in which there is an order of magnitude difference between the decay times.

© 2004 Optical Society of America

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(230.3990) Optical devices : Micro-optical devices

ToC Category:
Research Papers

Original Manuscript: October 21, 2004
Revised Manuscript: November 11, 2004
Published: November 29, 2004

Thomas Alkeskjold, Jesper Lægsgaard, Anders Bjarklev, David Hermann, Anawati Anawati, Jes Broeng, Jun Li, and Shin-Tson Wu, "All-optical modulation in dye-doped nematic liquid crystal photonic bandgap fibers," Opt. Express 12, 5857-5871 (2004)

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