00269nam a22001097a 4500020001500000040000900015082001800024100001900042245004700061260003400108650001700142  a0890064784  cNUST  a621.3827bROG  aRogers, A. J.   aUnderstanding Optical Fiber Communications  aBoston:bArtech House,c2001.  aFiber Optics