All-optically controllable dye-doped liquid crystal infiltrated photonic crystal fiber

Chia Rong Lee, Jia De Lin, Yan Jhen Huang, Shih Chan Huang, Shih Hung Lin, Chin Ping Yu

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

A novel demonstration of an all-optically controllable dye-doped liquid crystal infiltrated photonic crystal fiber (DDLCIPCF) is presented. Overall spectral transmittance of the DDLCIPCF can decrease and then increase with a concomitant red-shift of the spectrum curve with increasing irradiation time of one UV beam. Continuing irradiation of one green beam following UV illumination on the DDLCIPCF can cause the transmission spectrum to recover completely. The reversible all-optical controllability of the photonic band structure of the fiber is attributable to the isothermal planar nematic (PN) → scattering (S) → isotropic (I) and I → S → PN state transitions of the LCs via the UV-beam-induced trans→cis and green-beam-induced cis→trans back isomerizations of the azo-dye, respectively, in the cladding of the DDLCIPCF. The photoinduced appearance of the S state and the variation of the index modulation between the core and the cladding of the fiber result in the variation of overall spectral transmittance and the shift of transmission spectrum, respectively.

Original languageEnglish
Pages (from-to)9676-9689
Number of pages14
JournalOptics Express
Volume19
Issue number10
DOIs
Publication statusPublished - 2011 May 9

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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