Influence of Angular Orientation of the Embedded Highly Birefringent Fiber on Pmd Changes Under Axial Stress

In the paper we present results of the research on polarization mode dispersion changes inside the polarimetric optical fiber sensors based on highly birefringent optical fibers embedded into composite materials with different angular orientations of the optical axes. Based on measurements made for different types of highly birefringent optical fiber sensors we have shown that strain sensitivities after lamination process are different in comparison to the data obtained before lamination. Our results indicate that polarization mode dispersion in side-hole highly birefringent fibers under axial stress strongly depends on fiber orientation in the composite material suggesting that orientation of the polarization axes of the highly birefringent fiber can be responsible for behavior of the fiber inside the composite material

Photonic Crystal Fibers infiltrated with Ferroelectric Liquid Crystals

In the letter we present preliminary results of research on thermal and electrical tunability of photonic crystal fibers (PCF) infiltrated with ferroelectric liquid crystal (FLC) molecules. From this combination we expect new spectral properties to be observed, mainly due to the fast switching time of FLC molecules that can lead to the design of a new kind of optical filters. We have also obtained promising results about the spectral properties of photonic ferroelectric liquid crystal fibers (PFLCF), as well as orientation of FLC molecules inside PCF microholes

Photonic crystal fibers infiltrated with metallic nanoparticles dispersed in polydimethylsiloxane

An experimental results on birefringent photonic crystal fiber (PCF) selectively infiltrated with metallic nanoparticles (NPs) dispersed in polydimethylsiloxane (PDMS) are presented. In general, PCFs are structures consisting of periodic matrix of microholes surrounding core region, that can be either solid or hollow

Ferroelectric liquid crystals: futuristic mesogens for photonic applications

Since their discovery in 1888, liquid crystals (LCs) have attracted an unceasing research interest due to their exceptional electro-optical properties that are crucial in the development of displays and modern photonic systems. The vast majority of research works in this domain include the usage of nematic liquid crystals (NLCs) which are repellent for the high-speed optical photonic devices due to their slow electro-optical response. However, in context of electro-optical response time and switch-on voltage, the NLCs still have a huge space to be improved in comparison to other competitive technological solutions. Alternatively, the most promising candidates for development of the next-generation LC-based photonic devices are chiral smectic C (SmC*) LCs, also known as ferroelectric liquid crystals (FLCs) with their microseconds response time and low power consumption. This review comprehensively evinces the recent advancement on the FLC-based photonic devices such as gratings, lenses, spatial light modulators, waveguides, etc. along with the various electro-optical switching modes in these devices. We have also discussed the boon and bane of the FLC materials which is essentially important for their futuristic photonic applications

Influence of angular orientation of the embedded highly birefringent fiber on pmd changes under axial stress

In the paper we present results of the research on polarization mode dispersion changes inside the polarimetric optical fiber sensors based on highly birefringent optical fibers embedded into composite materials with different angular orientations of the optical axes. Based on measurements made for different types of highly birefringent optical fiber sensors we have shown that strain sensitivities after lamination process are different in comparison to the data obtained before lamination. Our results indicate that polarization mode dispersion in side-hole highly birefringent fibers under axial stress strongly depends on fiber orientation in the composite material suggesting that orientation of the polarization axes of the highly birefringent fiber can be responsible for behavior of the fiber inside the composite material

Spectral Properties of Photo-Aligned Photonic Crystal Fibers Infiltrated with Gold Nanoparticle-Doped Ferroelectric Liquid Crystals

This paper describes our recent results on light propagation in photonic crystal fibers (PCFs) partially infiltrated with W212 ferroelectric liquid crystal (FLC) doped with 1–3 nm gold nanoparticles (NPs) with a concentration in the range of 0.1–0.5% wt. Based on our previous results devoted to PCFs infiltrated with nematic liquid crystals (NLCs) doped with gold NPs (GNPs), we extend our research line with FLCs doped with these NPs. To enhance the proper alignment of the NP-FLC nanocomposites inside PCFs, we applied an additional photo-aligning layer of SD-1 azo-dye material (DIC, Japan). Electro-optical response times and thermal tuning were studied in detail. We observed an improvement in response times for NP-FLC nanocomposites in comparison to the undoped FLC