Microstructured optical fiber devices

Abstract

We present several applications of microstructured optical fibers and study their modal characteristics by using Bragg gratings inscribed into photosensitive core regions designed into the air-silica microstructure. The unique characteristics revealed in these studies enable a number of functionalities including tunability and enhanced nonlinearity that provide a platform for fiber device applications. We discuss experimental and numerical tools that allow characterization of the modes of the fibers.

Theory of the soliton self-frequency shift compensation by the resonant radiation in photonic crystal fibers

“…The prime reason for this is that PCFs offer numerous ways to control their nonlinear and dispersive characteristics, for reviews see Refs. [1][2][3][4][5]. For example, in silica core PCFs nonlinearity can be enhanced by the small modal area and group velocity dispersion (GVD) can be controlled by the engineering of the photonic crystal cladding [6,7].…”

Highdno/dTLiquid Crystals and their Applications in a Thermally Tunable Liquid Crystal Photonic Crystal Fiber

“…For example, in applications involving dispersion, polarization or attenuation, the transmission properties can be changed while keeping the signal within the fiber. For this purpose, photonic crystal fibers are an interesting candidate, since the air holes give close access to the guided light in the core and opens up for using liquids or liquid crystals infiltrated into the capillaries instead of air [10,21]. The optical properties of the liquids or liquid crystals are usually easier to modify than the silica, and this, therefore, opens up a new application for the tunable PCF-based components.…”

Tunable filter based on two cascaded photonic liquid crystal fibers

“…By tuning LCs properties it is possible to tune properties of the fiber and obtain tunable fiber devices. Consequently, several optical devices [10,11] based on photonic crystal fibers filled with liquid crystal such as: tunable filters [12], phase shifters [13] and optical attenuators [14] have already been demonstrated.…”