Three-dimensional fabrication of sub-micron optical waveguides in PDMS and other polymer materials
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We report on recent advances in micro fabrication technology using micromolding and high aspect ratio structuring of photopolymer. The direct application is the realization of components for millimeter-size, ultrasonic piezoelectric motors. A new fabricati ...
In this paper we describe new ways to realise micro-channels. The used technologies are based on a novel thick-film photoplastic, the SU-8. This photoresist has outstanding properties, allowing the realisation of high aspect ratio microstructures. It is a ...
Reflection, transmission and loss filters based on fiber Bragg gratings are key components in future wavelength division multiplexing telecommunication networks. A shift of the Bragg wavelength, λg, can be achieved by applying a strain or heating th ...
We study the interaction of a mode propagating in a planar waveguide with a three dimensional rectangular defect (protrusion or notch) in the structure. The scattering by the defect disturbes the propagation of the mode and light is coupled out of the wave ...
Experimental results of low-power excitation of a 118 GHz TE(22,6) rotating mode are presented. A rectangular waveguide is converted to a TE(22,6) circular waveguide mode using quasi-optical techniques. A good conversion efficiency is measured and the expe ...
The group index of well-defined cladding modes has been characterized for the first time to our knowledge by optical low-coherence reflectometry (OLCR) with a precision
We report on recent advances in micro fabrication technology using micromoulding and high-aspect ratio structuring of photopolymer. The direct application is the realization of components for millimeter-size, ultrasonic piezoelectric motors. A new fabricat ...
The synthesis and spectroscopic characterization of the chromoionophoric poly(methyl methacrylate-co-N-(9-[10-methacryloylmethyl]anthrylmethyl)monoaza-18-crown-6) (4) copolymer is described. Complexation of K+ by extraction from aqueous medium w ...
The results of round-robin measurements of waveguide loss and integrated mirror reflectivity in several European laboratories in the frame of the COST 240 project are presented. The Fabry-Perot cavity contrast method was used on semiconductor optical waveg ...