Title:
光導波路部材及び光モジュール
Document Type and Number:
Japanese Patent JP3923470
Kind Code:
B2
Abstract:
The present invention has an object of enhancing the tolerance of setup positioning error of an optical multiplexer/demultiplexer which uses a multi-mode optical waveguide. For this sake, the invention is designed to couple the multi-mode optical waveguide with a single-mode optical waveguide directly. In another configuration of this invention, there is provided between both optical waveguides a single-mode optical waveguide having its length set to be approximately equal to zero, or equal or approximately equal to the period of interference between the 0th-order mode and a radiative higher-order mode of the single-mode optical waveguide.
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Inventors:
Makoto Takahashi
Well standing
Toru Takahashi
Well standing
Toru Takahashi
Application Number:
JP2003538785A
Publication Date:
May 30, 2007
Filing Date:
February 27, 2002
Export Citation:
Assignee:
株式会社日立製作所
日立化成工業株式会社
日立化成工業株式会社
International Classes:
G02B6/30; G02B6/12; G02B6/122; G02B6/28; G02B6/34; G02B6/42
Domestic Patent References:
| JP1156703A | ||||
| JP2000121857A | ||||
| JP8201648A | ||||
| JP6138335A | ||||
| JP6317723A | ||||
| JP10048458A | ||||
| JP1039164A | ||||
| JP3171115A | ||||
| JP5157457A |
Foreign References:
| US4950045 | ||||
| US5640474 |
Other References:
H.Takahashi et.al.,IEEE Photonics Technology Letters,January 1993, Vol.5 No.1,p.58-60
Attorney, Agent or Firm:
Polaire Patent Business Corporation
Katsuo Ogawa
Kyosuke Tanaka
Katsuo Ogawa
Kyosuke Tanaka