Light emitting apparatus
文献类型:专利
作者 | IIDA MASANORI; HAGIWARA KIYOKAZU; ASAKURA HIROYUKI; NISHIOKA MINORU |
发表日期 | 1988-10-21 |
专利号 | JP1988254783A |
著作权人 | MATSUSHITA ELECTRIC IND CO LTD |
国家 | 日本 |
文献子类 | 发明申请 |
其他题名 | Light emitting apparatus |
英文摘要 | PURPOSE:To make it possible to detect the fluctuation of the intensity of light with the arrangements of a lens and a photodetector being fixed as they are regardless of oscillating frequencies, by obliquely arranging a transparent plate between one lens and a diffraction grating, which are arranged on one side of a laser element, making the light, which is reflected from the transparent plate, to pass through another lens, and directly detecting a part of the intensity of the light. CONSTITUTION:A transparent plate 4 is obliquely arranged between one lens 2 and a diffraction grating 3, which are arranged on one side of a laser element The intensity of the light, which is reflected from the transparent plate 4, is detected with a photodetector 6 through another lens 5. The light, which is emitted from the semiconductor laser element 1, is made to be parallel light rays, while the light rays are inputted into the diffraction grating 3 through the transparent plate 4. Only the specified wavelength of the incident light 7, which is dispersed with the diffraction grating 3, is coupled with the semiconductor laser element 1, and the semiconductor laser element 1 is stably oscillated. Meanwhile, the light, which is made to be parallel light rays, is reflected from the transparent plate 4 owing to the difference in refractive index. The reflected light 9 is condensed through the lens 5 and detected with the photodetector 6. Thus, the arrangements of the lens 5 and the photodetector 6 can be fixed, and the intensity of the output of the oscillating light can be detected readily and directly. |
公开日期 | 1988-10-21 |
申请日期 | 1987-04-10 |
状态 | 失效 |
源URL | [http://ir.opt.ac.cn/handle/181661/70769] ![]() |
专题 | 半导体激光器专利数据库 |
作者单位 | MATSUSHITA ELECTRIC IND CO LTD |
推荐引用方式 GB/T 7714 | IIDA MASANORI,HAGIWARA KIYOKAZU,ASAKURA HIROYUKI,et al. Light emitting apparatus. JP1988254783A. 1988-10-21. |
入库方式: OAI收割
来源:西安光学精密机械研究所
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