公开(公告)号：WO1980001958A1

公开(公告)日：1980-09-18

申请号：PCT/US1980000209

申请日：1980-03-03

Applicant: WESTERN ELECTRIC CO INC

Inventor： WESTERN ELECTRIC CO INC ,  DIETRICH M

IPC: G02B05/14

CPC classification number: G02B6/03633 ,  G02B6/02285 ,  G02B6/0288 ,  G02B6/03627

Abstract: Increased mode dispersion in graded-index multimode optical fibers due to defects in the index profile can be significantly reduced if the average defect is caused to varnish over the length of the fiber. For fibers with non-optimum (Alpha)-values, minimum impulse response can be achieved when (Alpha) varies along the fiber, such that the average value of (Alpha) is equal to (Alpha)opt. The effect of fluctuations superimposed upon the index profile are minimized by introducing an odd number of phase reversals in the fluctuations equally spaced along the fiber.