公开(公告)号：JPH09184936A

公开(公告)日：1997-07-15

申请号：JP26277796

申请日：1996-10-03

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： JIYONSUURU JIEON ,  SEOOKUHO SON

IPC: G02B6/122 ,  G02B6/12 ,  G02F1/313 ,  G02F1/35 ,  G02F1/365

Abstract: PROBLEM TO BE SOLVED: To provide a Y-junction type nonlinear optical waveguide which performs complete optical operation wherein the disadvantages of a conventional nonlinear directional coupler and a double-mode interference coupler are complemented and is large in branch angle. SOLUTION: This optical waveguide is composed of a straight linear optical waveguide 12 and a bent nonlinear optical waveguide 14 which is joined to the linear optical waveguide 12. When the power of incident light is less than specified, the incident light travels mainly to the linear optical waveguide 12 and when the power of the incident light is larger than specified, the incident light travels mainly to the nonlinear optical waveguide 14. Since the branch angle of the incident light is increased and an abrupt switching phenomenon takes place, the degree of integration can be improved and since it is not so difficult to adjust critical power, the manufacture is easy.