Numerical Investigation of the Photonic-Crystal Fibres with Suspended Core

Abstract

The photonic-crystal fibre with a suspended core was analyzed in order to explain possibilities of its using in investigation of electrooptic and magnetooptic effects occurring in the molecules of gas passed into air holes in the fibre. As results from numerical analysis, even 20% of electromagnetic optical energy can be propagating in the area of the air holes. The obtained results indicate the possibility of scanning the electrooptic and magnetooptic effects in photonic-crystal fibres with a suspended core in the case of considerable diminishing of the core (even below 1 µm) or in the case of light applying with its larger wavelengths.

Photonic structures with grating couplers based on ZnO

“…In the numerical analyses, the finite difference time do− main method (FDTD) was applied. This method permits to perform model investigations of optoelectronic structures, among others such with grating couplers [14,15]. The numer− ical investigations were carried out from the viewpoint of op− timizing the effectiveness of input and output of the optical power into and out of the photonic structure (Fig.…”

“…It ought to be kept in mind that the basis of realizing photonic structures with grating couplers as systems of introducing and emitting optical power into and out of the structure is the existence of waveguide layers with a relatively low attenuation of the optical signal. Planar waveguides constructed with the application of ZnO, presented in literature are characterized by a relatively high attenuation, above a > 3 dB/cm [14][15][16]. Our own technological investigations allowed us to obtain the ZnO waveguides with the attenuation coeffi− cient on the level a »2 dB/cm.…”

Hybrid photonics structures with grating and prism couplers based on ZnO waveguides

“…The electromagnetic wave (from the visible and near visible spectrum) can be removed from the planar waveguide by means of a grating coupler if the following condition is satisfied [17,18] …”

Numerical analyses of optical couplers for planar waveguides

“…The most popular ways of introducing opti− cal modes into and out of planar waveguides are applica− tions' prismatic couplers [1][2][3]. A possible solution is also the application of an input−output system in the form of Bragg's grating couplers [4,5]. The advantage of grating couplers is the possibility of producing them as an integral part of the system of integrated optics.…”