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Tunable Gaussian filter based on tapered liquid crystal photonic bandgap fibre

Tunable Gaussian filter based on tapered liquid crystal photonic bandgap fibre

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© The Institution of Engineering and Technology
Published

A tunable Gaussian filter based on a tapered liquid crystal photonic bandgap fibre is presented. The filter is centred at λ=1062 nm and has a 3 dB bandwidth of 150 nm. Tunability is achieved by exploiting the thermo-optic effect of the liquid crystals. A shift of 110 nm at the central wavelength is observed by increasing the temperature from 30 to 80°C.

Inspec keywords: thermo-optical effects; photonic band gap; optical fibre filters; optical filters; liquid crystals

Other keywords: liquid crystal photonic bandgap fibre; 110 nm; 150 nm; tunable Gaussian filter; thermo-optic effect; 30 to 80 C; 1062 nm

Subjects: Fibre optics; Spatial filters, zone plates, and polarizers; Spectral and other filters; Optical coatings and filters; Liquid crystals (optical materials); Photonic bandgap materials; Other fibre optical devices and techniques

References

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      • T. Larsen , A. Bjarklev , D. Hermann , J. Broeng . Optical devices based on liquid crystal photonic bandgap fibres. Opt. Express , 20 , 2589 - 2596
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      • T.T. Alkeskjold , J. Lægsgaard , A. Bjarklev , D. Hermann , A. Anawati , J. Broeng , J. Li , S.-T. Wu . All-optical modulation in dye-doped nematic liquid crystal photonic bandgap fibers. Opt. Express , 24 , 5857 - 5871
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      • N. Litchinitser , S. Dunn , P. Steinvurzel , B. Eggleton , T. White , R. McPhedran , C. de Sterke . Application of an ARROW model for designing tunable photonic devices. Opt. Express , 8 , 1540 - 1550
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