- 著者
- 神野 真吾 竹田 美和 茜 俊彦 平田 智也 久野 尚志 羊 億 磯貝 佳孝 渡邊 直樹 藤原 康文 中村 新男
- 出版者
- 日本結晶成長学会
- 雑誌
- 日本結晶成長学会誌 (ISSN:03856275)
- 巻号頁・発行日
- vol.29, no.2, 2002
ErP/InP heterostructure is one of the candidates for realizing new functional high-speed magneto-electronic devices. We have investigated growth morphology of ErP on InP (001) and (111)A. ErP/InP heterostructures were grown by face-down OMVPE. ErP formed islands on each orientation, while island size and height were quite different between two orientations.
1 0 0 0 駆動電流変調による赤色半導体レーザのスペックル低減法
- 著者
- 西田 武弘 藤原 康文 山本 和久 小泉 淳 八木 哲哉
- 出版者
- 一般社団法人 電気学会
- 雑誌
- 電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)
- 巻号頁・発行日
- vol.140, no.2, pp.181-186, 2020-02-01 (Released:2020-02-01)
- 参考文献数
- 31
Speckle reduction method for laser diode based displays was newly proposed. The method was based on temporal change of the active layer temperature which could be controlled by optimizing the driving condition of the laser diode under pulse. The red LD consisted of AlGaInP has low thermal conductivity and small energy difference between the active layer and the cladding one in the conduction band, resulting in the large temporal change of the lasing spectrum under the adequate driving condition in pulse. It indicates the speckle contrast could be controlled by changing the condition. The speckle contrast dependence on the driving condition of the high-power 638-nm lateral single mode laser diode was experimentally studied. In the experiment, not only the conventional square waveform but also the saw one were used. The speckle contrast under the adequate conditions for both waveforms was reduced approximately 25% compared with that under CW. In particular, the saw one might be expected as a very robust driving condition for the speckle reduction. This can be used with other speckle reduction method such as moving screen, moving diffuser and so on. In this sense, the newly proposal may be the speckle reduction method for “last one mile”.