Propagation Characterstics with Fractional Power in Core- Cladding of Optical Waveguide Using Helical Signal
Abstract
Optical fibers nre structt’res that are typically designed to transmit energy along specified trajectory with minimal attenuation and single distortion. Optical fibers with small losses appeared in 1970. This event has laid the found-ation for modern optical communication industry. However Si waveguides have some nonlinearity which occurs when electromagnetic waves interact with core of the waveguide. To do away with this problem it was begun to use Optical fibers with helical winding known as complex optical wave-guides. Also in conventional waveguide modes are mixed with adjacent mode if number is greater than 2.405. The use of helical winding in optical fibers makes the analysis much accurate. As the number of propagating modes depends on the helix pitch angle, so helical winding at core cladding interface can control the dispersion or propagation characteristics of the optical wave-guide. The model dispersion characteristics of circular optical waveguide with helical winding at core- cladding interface are obtained for different pitch angle. This paper gives the idea to obtain dispersion characteristics, and comparison of dispersion Characteristics at different pitch angles. We obtain-ed the dispersion characteristics by using boundary condition and this condition have been utilized to get the model Eigen equation. From these Eigen value equations curve are obtained and plotted for five Particular values of the pitch angle of the winding. Also Power now in core and cladding has been and the result has been compared.
Authors
Dhananjay Singh, Vivek Kumar Srivastav