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A suggestion of utilizing bimodal layers of the polymer SU8 for the purpose of monitoring the changes in the refractive index

100%

Gut K.

tom Vol. 42, nr 2

407-416

The paper presents the results of investigations concerning the measurements of the refractive index and the thickness of planar waveguide structures, obtained by photopolymerization of the polymer SU8. In the paper, the mode sensitivity has been calculated as a function of the thickness in a bimodal structure. The differential interference has been analyzed, concerning the modes of the same types TE0-TE1 and TM0-TM1. The thickness of the layer has been determined when the interferometer is most sensitive to the changes in the refractive index.

Numerical analyses of optical couplers for planar waveguides

100%

Pustelny T. , Struk P.

tom Vol. 20, No. 3

201-206

The paper presents the results of numerical analyses of optical structures realized in the form of planar waveguides made of materials with high values of the refractive index n ≈ 1.85. The analysed structures consist of a waveguide and input-output systems. Input-output couplers are realized in the form of prisms as well as Bragg's grating couplers. Numerical investigations were carried out by applying the finite difference time domain (FDTD) method.

Two-Mode Planar and Channel Polarimetric Difference Interferometer

100%

Gut K.

tom Vol. 25

101-108

In the paper are presented investigations of planar and channel polarimetric interferometer made by ion exchange in glass for sensor applications. J have determined the dependence of the difference of propagation constants of orthogonal modes of the same order on the refractive index of the cover, for planar waveguides obtained during the ion exchange K+-Na+ in the glass BK-7. Similar measurements have been made for the exchange Ag+-Na+, determining also for that case the influence of heating time on those parameters.

Investigating the Attenuation Changes of Modes Guided in Waveguides with Absorbing Cover

100%

Gut K. , Pamuła M.

2001

tom Vol. 22

187-196

The paper is summarizing theoretical and experimetal works carried out so far, involving the investigation on the influence of the absorption of the planr waveguide's cover on the attenuation of the guided modes - a phenomenon being a fundamental element for the functioning of optic sensors based on the effect of absorption change af the cover. Theoretical fundamentals of this phenomenon have been discussed, a new measurement methods has been.