发明名称 |
Semiconductor optical device, fiber optical amplifier and optical transmission system |
摘要 |
A semiconductor optical device, a fiber optical amplifier and an optical transmission system are disclosed. The semiconductor optical device is excellent in the stability of the coupling efficiency and the splitting ratio of a Y-branch. Both the fiber optical amplifier and the optical transmission system operate in a stable manner over a long period of time even if an optical waveguide is employed which is operative in a multi-mode in the transverse direction. The semiconductor optical device has an optical waveguide, a mode filter for transmitting therethrough light of a fundamental mode and blocking the propagation of light of a higher-order mode. The mode filter is provided in at least a part of the optical waveguide. The width of the mode filter is larger than that of the optical waveguide.
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申请公布号 |
US6111998(A) |
申请公布日期 |
2000.08.29 |
申请号 |
US19970919306 |
申请日期 |
1997.08.28 |
申请人 |
HITACHI, LTD. |
发明人 |
IDO, TATEMI;SANO, HIROHISA;GOMYO, HIROYUKI |
分类号 |
G02B6/126;G02B6/12;G02B6/14;G02F1/025;H01L27/15;H01S3/10;H01S5/00;H01S5/026;H01S5/10;H01S5/50;(IPC1-7):G02B6/26 |
主分类号 |
G02B6/126 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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