Wyniki wyszukiwania - BazTech

1

Optical uniform/gradient waveguide sensor structure-characterization

Karasiński P.

Opto-Electronics Review

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2011

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Vol. 19, No. 1

1-9

EN

The paper presents the characterization of a composite uniform/gradient waveguide sensor structure. The results of theoretical analysis and experimental studies have been presented. The influence of sensor structure parameters on homogenous sensitivity and on surface sensitivity has been analyzed. Gradient layers for composite sensor structures were produced using the ion-exchange method, and the uniform layers, using the sol-gel method. In the experimental studies, involving the produced sensor structures, a prism coupler and a grating coupler were applied. Excellent agreement between the results of theoretical analysis and experimental studies has been achieved.

2

Żebrowe światłowody paskowe do zastosowań sensorowych

Karasiński P., Rogoziński R., Tyszkiewicz C.

Pomiary Automatyka Kontrola

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2010

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R. 56, nr 6

541-543

PL

Zmiany efektywnych współczynników załamania w czujnikach światłowodowych pracujących w oparciu o spektroskopię pola zanikającego mierzone są z zastosowaniem sprzęgaczy siatkowych lub interferometrów. Podstawowym elementem interferometrów planarnych są światłowody paskowe. Przedstawiana praca dotyczy żebrowych światłowodów paskowych. Otrzymywane metodą zol-żel warstwy falowodowe SiO2:TiO2 są selektywnie maskowane z zastosowaniem tradycyjnej fotolitografii a następnie trawione chemicznie. W ten sposób zostały wytwarzane jednomodowe żebrowe światłowody paskowe i sprzęgacze kierunkowe. W pracy przedstawione są wyniki analizy teoretycznej światłowodów żebrowych i wyniki badań eksperymentalnych wytworzonych struktur.

EN

Basic elements of planar interferometers are the channel waveguides. Presented work refers to the channel rib waveguides. In our previous work [7] we offered the production method of rib channel waveguides with the application of traditional photolithography and wet chemical etching of sol-gel derived silica-titania waveguide films. In this work we present new results of our research on rib waveguides and directional couplers. The theoretical analysis of rib waveguides was presented as well as the results of experimental investigations on the fabricated structures. The investigations on channel waveguides of the rib height of 5 nm was carried out for wavelengths: λ=677 nm. The waveguide films used in rib waveguides manufacturing technology are characterized by high refractive index (˜1.8) and ultra-low attenuation of 0.15 dB/cm. Rib waveguides of width w<4 Μm are monomode. For the rib waveguides we obtained the attenuation of (1.5š0.1) dB/cm. Rib waveguides of such an attenuation can be applied in the technology of integrated optics systems in sensor applications, and in particular for the construction of interferometers of Mach-Zehnder, Young or Michelson. The improvement of technology, and in particular the improvement in the quality of photolithographic masks should contribute to further decrease of attenuation of the produced rib waveguides.

3

Sol-gel derived sensitive films for ammonia evanescent wave sensors

Karasiński P.

Optica Applicata

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2003

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Vol. 33, nr 2-3

477-487

EN

The paper presents the results of investigation on the application of sol-gel technique to production of sensitive films. The sensitive films are made using silica SiO2 in which an indicator is bound. Bromocresol purple was applied as the indicator. The films produced are sensitive to ammonia.