发明名称 |
Optical filters |
摘要 |
An optical filter is formed from at least two grating located in a waveguide region of a semiconductor optical device. Each grating has a multiple peak optical passband. The gratings are spaced apart in the waveguide region and form an optical cavity having a comb-filter characteristic. The gratings may be located in the active region of an optical gain element and in a preferred example are superstructure gratings (SSGs). A number of filters may be joined together in series.
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申请公布号 |
US6198863(B1) |
申请公布日期 |
2001.03.06 |
申请号 |
US19980051207 |
申请日期 |
1998.04.28 |
申请人 |
BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY;HITACHI LIMITED |
发明人 |
LEALMAN IAN F;ROBERTSON MICHAEL J;OKAI MAKOTO |
分类号 |
G02B6/12;G02B6/124;H01S5/0625;H01S5/10;H01S5/12;H01S5/323;H01S5/50;(IPC1-7):G02B6/34 |
主分类号 |
G02B6/12 |
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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