In the present work, KTP crystals have been grown by spontaneous nucleation technique in flux medium using K6P4O13 flux. 0.4-1 °C/h cooling rates were applied in the spontaneous nucleation process. The presence and amount of impurities has been determined by using XRF. The optical transmission spectra of impure KTP crystals in the UV–visible region are discussed. The transmission cut-off is cle...

The paper presents complex investigation of optical characteristics and some structural parameters of ZnS and ZnSe films obtained by the close-spaced sublimation technique under different growth condition. Investigation of optical characteristics was carried out in the 350-900 nm wavelength range for ZnS and 300-600 nm for ZnSe. Spectral distributions of transmission Т( ) and reflection spectra...

This contribution discusses characteristics of environmental influences on transmitted signals in the optical transmission medium. A main attention is focused on the explanation of simulation methods for substantial linear and nonlinear negative effectsin the optical fiber presented by the proposed simulation model. The paper also presents characteristics of modulation techniques utilized in th...

In this thesis, all-optical processing for future optical networks is studied by means of parametric processes in optical fibers. Parametric processes are nonlinear effects which arise in optical fibers when high-powered waves are properly placed at specific spectral positions. The properties of parametric processes are defined by the optical fiber characteristics, the power and the wavelength ...

Optical couplers are very important devices in optical communication systems and optical sensor systems. Several types of optical couplers with different materials or different transmission characteristics have been reported. Here we propose a semi-reciprocal polarization maintaining fibre coupler with unique transmission characteristics, which is distinct from conventional polarization maintai...

ZnO nanorods with various aspect ratios (by changing the time of growth between 0-240 min) were synthesized using hydrothermal method and were investigated using XRD, SEM, UV–Vis and PL. It was found that growth time is directly coupled with the length, orientation and aspect ratio of the nanorod arrays. The optical transmittance of the NR arrays indicated a regular decrement of average transmi...

We investigated the spectral and temporal characteristics of blue-violet femtosecond optical pulses generated by a passively mode-locked GaInN laser diode in a dispersion-compensated external cavity. The output optical pulses at 400 nm were analyzed in detail by intensity autoand cross-correlation measurements using second harmonic generation on the surface of a β-BaB2O4 crystal. The obtained r...

We describe an optical transmission line that consists of an array of wavelength-scale optical disk resonators coupled to an optical waveguide. Such a structure leads to exotic optical characteristics, including ultraslow group velocities of propagation, enhanced optical nonlinearities, and large dispersion with a controllable magnitude and sign. This device supports soliton propagation, which ...