Title:
【発明の名称】光分岐導波路
Document Type and Number:
Japanese Patent JP3133396
Kind Code:
B2
Abstract:
An optical branching waveguide having low radiative loss and low back-reflectivity is described. By employing between the branches (340,360) a region (380) having a gradual decrease in effective refractive index along the direction of optical propagation, the deleterious effect of wedge tip truncation can be reduced. According to the teachings of the invention, this may be accomplished by gradually decreasing the thickness of the optical material along the axis of optical propagation and planarizing the region with an optical material having an lower refractive index than the underlying optical material.
Inventors:
Use L Collen
Can-Elio
Can-Elio
Application Number:
JP19042291A
Publication Date:
February 05, 2001
Filing Date:
July 31, 1991
Export Citation:
Assignee:
AT&T CORP.
International Classes:
G02B6/125; H01S5/026; G02B6/122; (IPC1-7): G02B6/122; H01S5/026
Domestic Patent References:
| JP56126809A | ||||
| JP6360405A | ||||
| JP61246705A |
Attorney, Agent or Firm:
Masao Okabe (2 outside)
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