The Influence of Phase Shift of Interference on Signal Propagation along the Optical Fiber

Petar Spalevic The Faculty of Electronic Engineering, University of Nis Aleksandra Medvedeva 14, 18000 Nis, Serbia; tel.:018-538-323; e-mail: pspalevic@ptt.yu Ljubica Spalevic The Faculty of Mathematical Sciences, University of Kosovska Mitrovica Kneya Milosa 9, 38200 Kosovska Mitrovica, Serbia; tel.:063 773 88 59; e-mail: ljspalevic@ptt.yu Borivoje Milosevic High Technical School, Nis, Aleksandra Medvedeva 10, 18000 Nis, Serbia; tel.:018-531-423; e-mail boram@ptt.yu, Ivana Petrovic High School of Electrical Enginnering, Beograd Vojvode Stepe 283, 11000 Beograd, Serbia; tel.:011-2669-095; e-mail: ivanap@yahoo.com.