发明名称 |
Optical wavelength filter device. |
摘要 |
<p>An optical wavelength filter device comprises a first optical wavelength filter (10) of a mode conversion type and a second optical wavelength filter (12) of an interferometer type optically coupled to the first optical wavelength filter. This combination produces an increased number of transmission channels, with a reduced line width and increased tuning width, compared with the performance of the filters individually.</p> |
申请公布号 |
EP0478391(A2) |
申请公布日期 |
1992.04.01 |
申请号 |
EP19910308921 |
申请日期 |
1991.09.30 |
申请人 |
OKI ELECTRIC INDUSTRY CO., LTD. |
发明人 |
OKAYAMA, HIDEAKI;USHIKUBO, TAKASHI |
分类号 |
G02F1/29;G02F1/313;H01S3/1055;H01S5/10;H01S5/50;H04J14/04 |
主分类号 |
G02F1/29 |
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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