发明授权
- 专利标题: Integrated semiconductor light emitting element with oscillation wavelength and phase modulated light output
- 专利标题(中): 具有振荡波长和相位调制光输出的集成半导体发光元件
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申请号: US767152申请日: 1985-08-19
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公开(公告)号: US4720835A公开(公告)日: 1988-01-19
- 发明人: Shigeyuki Akiba , Katsuyuki Utaka , Yukio Noda , Yukitoshi Kushiro
- 申请人: Shigeyuki Akiba , Katsuyuki Utaka , Yukio Noda , Yukitoshi Kushiro
- 申请人地址: JPX Tokyo
- 专利权人: Kokusai Denshin Denwa K.K.
- 当前专利权人: Kokusai Denshin Denwa K.K.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX59-176838 19840827
- 主分类号: G02F1/025
- IPC分类号: G02F1/025 ; H01S5/00 ; H01S5/062 ; H01S5/0625 ; H01S5/12 ; H01S5/16 ; H01S3/19
摘要:
A semiconductor light emitting element is disclosed, which is provided with a light emitting region having a diffraction grating formed by periodic corrugations, a modulation region having an external waveguide layer optically connected directly to the light emitting region and a pn junction separated from a pn junction of the light emitting region and a window region formed of a semiconductor having a larger energy gap than that of a light emitting layer of the light emitting region and extending from at least one end of the light emitting region and the external waveguide layer. The refractive index of the external waveguide is varied through utilization of the electrooptic effect so that the frequency or phase of light stably oscillating at a single wavelength is precisely controlled or modulated. In particular, when the window region is formed only outside the light emitting region, frequency modulation is carried out, and when the window region is formed at least outside the modulation region, phase modulation takes place.