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10 items by relevance
1 Conference paper

Liquid crystal photonic bandgap fibers

Alkeskjold, Thomas Tanggaard

Proceedings Conf. on Liquid Crystal Technology and Applications — 2006

Year: 2006

Language: English

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2 Conference paper

Liquid crystal photonic bandgap fibers

Hermann, D.S.; Alkeskjold, Thomas Tanggaard; Broeng, Jes; Bjarklev, Anders Overgaard

Book of Abstracts — 2004

Year: 2004

Language: English

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geko djbncfmap hli
3 PhD Thesis

Optical devices based on liquid crystal photonic bandgap fibers

Alkeskjold, Thomas Tanggaard

Technical University of Denmark — 2005

the waveguiding mechanism of LC filled PCFs. The principle of tunable fibers based on LCs is thereafter discussed and an alignment and coating study of LC in capillaries is presented. Next, the Liquid Crystal Photonic BandGap (LCPBG) fiber is presented and the waveguiding mechanism is analyzed through plane-wave

Year: 2005

Language: English

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4 Conference paper

Gaussian Filtering with Tapered Liquid Crystal Photonic Bandgap Fibers

Scolari, Lara; Alkeskjold, Thomas Tanggaard; Bjarklev, Anders Overgaard

Leos Proceedings 2006 — 2006, pp. 829-830

We present a device based on a tapered Liquid Crystal Photonic Bandgap Fiber that allows active all-in-fiber filtering. The resulting Photonic Bandgap Fiber device provides a Gaussian filter covering the wavelength range 1200-1600 nm

Year: 2006

Language: English

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5 Journal article

Polarization Properties of Elliptical-Hole Liquid Crystal Photonic Bandgap Fibers

Tartarini, Giovanni; Pansera, Marco; Alkeskjold, Thomas Tanggaard; Bjarklev, Anders Overgaard; Bassi, Paolo

Journal of Lightwave Technology — 2007, Volume 25, Issue 9, pp. 2522-2530

The characteristics of triangular photonic crystal fibers (PCFs) with elliptical holes filled with a nematic liquid crystal (LC) are investigated theoretically. The analysis that is carried out using the finite-element method, including material dispersion effects, shows that LC anisotropy and hole

Year: 2007

Language: English

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6 Journal article

Polarization Properties of Elliptical-Hole Liquid Crystal Photonic Bandgap Fibers

Tartarini, G.; Pansera, M.; Alkeskjold, T.T.; Bjarklev, A.; Bassi, P.

Journal of Lightwave Technology — 2007, Volume 25, Issue 9, pp. 2522-2530

The characteristics of triangular photonic crystal fibers (PCFs) with elliptical holes filled with a nematic liquid crystal (LC) are investigated theoretically. The analysis that is carried out using the finite-element method, including material dispersion effects, shows that LC anisotropy and hole

Year: 2007

Language: English

More...
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7 Conference paper

Electrically tunable bandpass filter based on liquid crystal photonic bandgap fibers

Wei, Lei; Alkeskjold, Thomas Tanggaard; Bjarklev, Anders Overgaard

2010 Conference on (ofc/nfoec) Optical Fiber Communication (ofc), Collocated National Fiber Optic Engineers Conference — 2010, pp. 1-3

An electrically tunable bandpass filter based on two photonic crystal fibers filled with different liquid crystals is demonstrated. Both the short-wavelength and long-wavelength edge are tuned individually or simultaneously with the response time in milliseconds.

Year: 2010

Language: English

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8 Conference paper

Compact Electrically tunable Waveplate Based on Liquid Crystal Photonic Bandgap Fibers

Wei, Lei; Alkeskjold, Thomas Tanggaard; Keller, Stephan Urs; Lindhard, Jonas Michael; Jensen, Helle Vendelbo; Nielsen, Kristian; et al. (2 more)

Technical Digest, Cleo/qels — 2009, pp. 1-2

A compact tunable waveplate based on negative dielectric liquid crystal photonic bandgap fibers is presented. The birefringence can be tuned electrically to work as a quarter-wave or a half-wave plate in the wavelength range 1520nm-1600nm.

Year: 2009

Language: English

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ilonhgcmb pfa jked
9 Conference paper

Electrically tunable long-period gratings in liquid crystal photonic bandgap fibers

Noordegraaf, Danny; Scolari, Lara; Lægsgaard, Jesper; Rindorf, Lars Henning; Alkeskjold, Thomas Tanggaard

Conference on Optical Fiber Communication and the National Fiber Optic Engineers Conference, 2007. Ofc/nfoec 2007 — 2007, pp. 1-3

We demonstrate an aLl-electrically tunable long period grating in a photonic crystal fiber infiltrated with a nematic liquid crystal. The spectral dips and the resonance wavelengths are tuned electrically and thermally, respectively.

Year: 2007

Language: English

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10 Journal article

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

Alkeskjold, Thomas Tanggaard; Lægsgaard, Jesper; Bjarklev, Anders Overgaard; Hermann, David Sparre; Anawati, Anawati; Broeng, Jes; et al. (2 more)

Optics Express — 2004, Volume 12, Issue 24, pp. 5857-5871

) 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

Year: 2004

Language: English

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