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Proceedings Paper

Speckle characteristics of a broad-area laser diode
Author(s): Shengtao Zhang; Wenhong Gao; Yunbo Shi; Pengfei Zhao; Xuyuan Chen
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Paper Abstract

In this paper, far field speckle contrast from a broad area laser diode is measured. The intensity of the incident laser light onto a diffuser is controlled by using polarizer or adjusting input current. A rectangular aperture close to diffuser is used to select different parts of laser light field as illumination spot. The speckle contrast measured for different illuminationspots has no significant change. When the laser diode operates at its typical power output condition, the speckle contrast measured approximately equals 1, while the speckle contrast is depressed tremendously when the laser diode operates with low driving current.

Paper Details

Date Published: 29 November 2012
PDF: 6 pages
Proc. SPIE 8552, Semiconductor Lasers and Applications V, 85520Y (29 November 2012); doi: 10.1117/12.2000125
Show Author Affiliations
Shengtao Zhang, North Univ. of China (China)
Wenhong Gao, North Univ. of China (China)
Yunbo Shi, North Univ. of China (China)
Pengfei Zhao, North Univ. of China (China)
Xuyuan Chen, North Univ. of China (China)
Vestfold Univ. College (Norway)


Published in SPIE Proceedings Vol. 8552:
Semiconductor Lasers and Applications V
Ning Hua Zhu; Jinmin Li; Frank H. Peters; Changyuan Yu, Editor(s)

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