公开(公告)号：JP2001264595A

公开(公告)日：2001-09-26

申请号：JP2001053270

申请日：2001-02-28

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DIETRICH MERCUS ,  VICTOR MITCHELL AQUARO ,  GEORGE L FISCHER ,  PRESBY HERMAN MELVIN

IPC: G02B6/42 ,  G02B6/26 ,  G02B6/30 ,  H01S3/30 ,  H01S5/022

Abstract: PROBLEM TO BE SOLVED: To provide a method and a device for coupling a multi-mode laser with a multi-mode fiber using a multi-mode tapered structure. SOLUTION: The disclosed multi-mode tapered structure receives a light beam having a beam shape with a high ellipticity and converts the light beam so as to be able to receive it in a circular multi-mode optical fiber. According to one form of this invention, the multi-mode tapered structure has a tapered shape having an ellptical section to match a rectangular laser opening on one end and a circular section to match a fiber core on the other end. The disclosed multi-mode tapered structure is tapered correspondingly from a small dimension of the input end matching that of a multi-mode light source to a large dimension of the output end matching the circular core of a multi-mode fiber. This invention enables a coupling efficiency to be attained as much as 98%, depending on the number of the openings and the selection of the lengths of the multi-mode tapered structure.