Xi'an Institute of Optics and Precision Mechanics,CAS
Semiconductor laser device | |
其他题名 | Semiconductor laser device |
WATANABE HITOSHI; FUJIWARA MASATOSHI; TAKEMOTO AKIRA; KAKIMOTO SHOICHI | |
1990-12-10 | |
专利权人 | MITSUBISHI ELECTRIC CORP |
公开日期 | 1990-12-10 |
授权国家 | 日本 |
专利类型 | 发明申请 |
摘要 | PURPOSE:To enable the oscillation of single wavelength without a mode skipping even at the time of high output by thickening a thickness of a barrier layer in adjacency of a region where a light density is relatively high, compared with other regions, in an element of a distributor-feedback-type semiconductor laser device comprising a barrier layer structure. CONSTITUTION:After an n-type barrier layer 6 is formed on an InGaAsP active layer 2, the both side ends are etched smoothly while leaving the center part. Furthermore, an InGaAs guide layer 4 is grown on said n-type barrier layer 6, after which diffraction gratings 5 are formed. Then, a clad layer is re-grown. Thus, if a thickness of the n-type barrier layer 6 is thicker in a specified region, the connection of the diffraction gratings and the light becomes weak in that region. Namely, a connection constant K of the diffraction gratings 5 is small. Accordingly, as the ununiformity of a light density distribution does not become so remarkable at the time of high output, the single mode oscillation can be obtained. |
其他摘要 | 目的:通过在光密度相对较高的区域附近增厚阻挡层的厚度,即使在高输出时也能够在没有模式跳跃的情况下实现单波长的振荡,与其他区域相比,在元件中一种分配器反馈型半导体激光器件,包括阻挡层结构。组成:在InGaAsP有源层2上形成n型阻挡层6后,两个侧端平滑地蚀刻,同时留下中心部分。此外,在所述n型阻挡层6上生长InGaAs引导层4,之后形成衍射光栅5。然后,再生长包层。因此,如果n型阻挡层6的厚度在特定区域中较厚,则衍射光栅与光的连接在该区域中变弱。即,衍射光栅5的连接常数K小。因此,由于在高输出时光密度分布的不均匀性不会变得如此显着,所以可以获得单模振荡。 |
申请日期 | 1989-05-12 |
专利号 | JP1990298091A |
专利状态 | 失效 |
申请号 | JP1989119227 |
公开(公告)号 | JP1990298091A |
IPC 分类号 | H01S5/00 | H01S3/18 |
专利代理人 | - |
代理机构 | - |
文献类型 | 专利 |
条目标识符 | http://ir.opt.ac.cn/handle/181661/86525 |
专题 | 半导体激光器专利数据库 |
作者单位 | MITSUBISHI ELECTRIC CORP |
推荐引用方式 GB/T 7714 | WATANABE HITOSHI,FUJIWARA MASATOSHI,TAKEMOTO AKIRA,et al. Semiconductor laser device. JP1990298091A[P]. 1990-12-10. |
条目包含的文件 | ||||||
文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
JP1990298091A.PDF(131KB) | 专利 | 开放获取 | CC BY-NC-SA | 请求全文 |
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