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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 3 — Feb. 1, 2010
  • pp: 2613–2620

All-optically controllable distributed feedback laser in a dye-doped holographic polymer-dispersed liquid crystal grating with a photoisomerizable dye

Huai-Pei Tong, Yu-Ren Li, Jia-De Lin, and Chia-Rong Lee  »View Author Affiliations


Optics Express, Vol. 18, Issue 3, pp. 2613-2620 (2010)
http://dx.doi.org/10.1364/OE.18.002613


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Abstract

This work demonstrates, for the first time, an all-optically controllable distributed feedback (DFB) laser based on a dye-doped holographic polymer-dispersed liquid crystal (DDHPDLC) grating with a photoisomerizable dye. Intensity of the lasing emission can be reduced and increased by raising the irradiation intensity of one CW circularly-polarized green beam and the irradiation time of one CW circularly-polarized red beam, respectively. The all-optical controllability of the lasing emission is owing to the green-beam-induced isothermal nematic→isotropic and red-beam-induced isothermal isotropic→nematic phase transitions of the LCs via transcis and cistrans back isomerizations of the azo-dye, respectively, in the LC-droplet-rich regions of the grating. The former (latter) mechanism can reduce (increase) the index modulation and thereby the coupling strength in the DFB grating, resulting in the decay (rise) of the lasing emission. Thermal effect is excluded from possible mechanisms causing such an optical controllability of the lasing emission.

© 2010 OSA

OCIS Codes
(140.3490) Lasers and laser optics : Lasers, distributed-feedback
(160.3710) Materials : Liquid crystals
(230.1150) Optical devices : All-optical devices

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: December 7, 2009
Revised Manuscript: January 18, 2010
Manuscript Accepted: January 19, 2010
Published: January 25, 2010

Citation
Huai-Pei Tong, Yu-Ren Li, Jia-De Lin, and Chia-Rong Lee, "All-optically controllable distributed feedback laser in a dye-doped holographic polymer-dispersed liquid crystal grating with a photoisomerizable dye," Opt. Express 18, 2613-2620 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-3-2613


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