A method for butt-coupling optical fibres to liquid crystal planar waveguides

Bellini, Bob; d’Alessandro, Antonio; Beccherelli, Romeo

doi:10.1016/j.optmat.2006.03.039

Cited by 23 publications

(11 citation statements)

References 8 publications

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“…Optical measurements were performed using a tunable laser (Santec, TSL-510-C, tuning range: 1500-1630 nm, wavelength resolution: 1 pm) that was coupled from an optical fiber to individual waveguides using butt-coupling method [18] (see Fig. 2).…”

Section: Optical Measurementsmentioning

confidence: 99%

Optical sensor for hydrogen gas based on a palladium-coated polymer microresonator

Eryürek

Karadağ

Taşaltın

et al. 2015

Sensors and Actuators B: Chemical

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Section: Optical Measurementsmentioning

confidence: 99%

Optical sensor for hydrogen gas based on a palladium-coated polymer microresonator

Eryürek

Karadağ

Taşaltın

et al. 2015

Sensors and Actuators B: Chemical

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“…Such losses are mainly due to the lack of neat input and output faces, as described above, which also induced great propagation losses for a few mm at both entrance and exit sections of the waveguides. A significant reduction of both coupling and propagation losses is expected by including input and output short coupling polymeric waveguides, as described in [19], by infiltrating higher refractive index PDMS, to get neat defect free NLC-PDMS interfaces at both input and output waveguide sections.…”

Section: Optical Characterizationmentioning

confidence: 99%

Polarization-Independent Nematic Liquid Crystal Waveguides for Optofluidic Applications

d’Alessandro

Martini

Gilardi

et al. 2015

IEEE Photon. Technol. Lett.

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We present the fabrication and the characterization of waveguides made of a nematic liquid crystal infiltrated in poly(dimethylsiloxane) channels. They are made by means of cast and molding technique and patterned by using soft photolithography. The orientation of the nematic liquid crystal molecules induced by the poly(dimethylsiloxane) inner surfaces of the channels allows a polarization independent optical propagation. Optical transmission measurements showed an average of just 0.35 dB variation of light transmission versus input polarization orientation.

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“…The n-doped silicon substrate is used as counter electrode. NOA61 UV adhesive by Norland is used to seal the input and output and to define neat interfaces with NLC core of the waveguide [18]. Table 1 reports refractive indices of the materials, where n // and n ⊥ are the two indices of refraction parallel and perpendicular to the molecular axis of the NLC respectively.…”

Section: Device Structure and Fabricationmentioning

confidence: 99%

All-Optical Liquid Crystal Waveguide on Silicon

Trotta

Asquini

d’Alessandro

et al. 2011

Molecular Crystals and Liquid Crystals

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In this paper we demonstrate nonlinear optical properties of a channel waveguide made of E7 nematic liquid crystal infiltrated in a SiO 2 /Si V-groove. Light in C-Band (1530C-Band ( -1565, fiber coupled to the core of the liquid crystal waveguide, was optically modulated by the optical beam itself, with a power below 25 mW. A bias voltage was applied to induce a liquid crystal orientation over the Freedericksz threshold and a further director reorientation was obtained by increasing the optical beam. The effect of optical modulation for different applied voltages obtained experimentally was modelled including both opto and electro-optical effects.

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A method for butt-coupling optical fibres to liquid crystal planar waveguides

Cited by 23 publications

References 8 publications

Optical sensor for hydrogen gas based on a palladium-coated polymer microresonator

Optical sensor for hydrogen gas based on a palladium-coated polymer microresonator

Polarization-Independent Nematic Liquid Crystal Waveguides for Optofluidic Applications

All-Optical Liquid Crystal Waveguide on Silicon

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