Transmission through Twisted Clad Liquid Crystal Optical Fibers

The paper presents an analytical investigation of three- layer twisted clad liquid crystal flber in respect of its power propagation characteristics. The flber under consideration has dielectric non- magnetic materials in its core and inner clad sections, whereas the outermost clad is made of radially anisotropic liquid crystal material. Twist in the flber is introduced in the form of superflne helical turns at the interface of the core and the inner clad regions with specifled values of pitch angle. Results demonstrate large conflnement of optical power in the outermost liquid crystal section. Further, the angle of twist is seen to have its pronounced efiect on controlling the ∞ow of power as it exhibits the ability of governing the propagation characteristics of the medium. The observed propagation feature is attributed to the radial anisotropy of the liquid crystal outer region as well as the amount of twist introduced, and attracts useful applications of such complex flber structures in evanescent fleld optical sensing and other coupling devices primarily used in integrated optics.