29 November 2012 Speckle characteristics of a broad-area laser diode
Author Affiliations +
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.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Shengtao Zhang, Shengtao Zhang, Wenhong Gao, Wenhong Gao, Yunbo Shi, Yunbo Shi, Pengfei Zhao, Pengfei Zhao, Xuyuan Chen, Xuyuan Chen, "Speckle characteristics of a broad-area laser diode", Proc. SPIE 8552, Semiconductor Lasers and Applications V, 85520Y (29 November 2012); doi: 10.1117/12.2000125; https://doi.org/10.1117/12.2000125


Back to Top