光波長フィルター
文献类型：专利
| 作者 | 坂田 肇; 織田 仁 |
| 发表日期 | 1998-10-09 |
| 专利号 | JP2836051B2 |
| 著作权人 | キヤノン株式会社 |
| 国家 | 日本 |
| 文献子类 | 授权发明 |
| 其他题名 | 光波長フィルター |
| 英文摘要 | PURPOSE:To reduce inter-wavelength crosstalk and to shorten coupling length by composing one cycle of a peak part which is a high-refractive-index area of a grating and a bottom part which is a low-refractive-index area, and varying their ratio and length over a coupling area. CONSTITUTION:The grating 8 is formed in the area where propagation modes generated in 1st and 2nd waveguides 4 and 6 are coupled. Then the grating 8 has one cycle composed of the peak part as the high-refractive-index area and the bottom part as the low-refractive-index area, the ratio of the peak part and bottom part to one cycle is distributed in a tapered shape over the coupling area, and the length of one cycle is distributed in a tapered shape over the coupling area. Desired wavelength light is demultiplexed with excellent filter characteristics, and even when the grating depth for shortening the coupling length is increased, the desired wavelength light can be demultiplexed without deteriorating the filter characteristics. Consequently, the inter-wavelength crosstalk is reduced and the coupling length comes to short. |
| 公开日期 | 1998-12-14 |
| 申请日期 | 1990-02-26 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/42365]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | キヤノン株式会社 |
| 推荐引用方式 GB/T 7714 | 坂田 肇,織田 仁. 光波長フィルター. JP2836051B2. 1998-10-09. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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