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《Chinese Journal of Lasers》 2005-01
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Study of Temporal and Spatial Coherence of Light Emitting Diode

LI Jun-tao, ZHU Jian, WANG Zi-xin, LI Ming, ZHOU Jian-ying (The State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen Univisity, Guangzhou, Guangdong 510275, China)  
The temporal and spatial coherence of light emitting diode (LED) is studied by Michelson interferometer with subfemtosecond time resolution. LEDs′ spectral characteristics and coherence time are measured, and their emitting area is estimated by LEDs′ interference signal. Systematic errors in the experiments are discussed and the solutions to reduce the errors are suggested. Results show that LED can be applied as a light source for stable and time resolved spectroscopy.
【Fund】: 国家自然科学基金(90201027 10374120);; 广东省千百十人才工程资助项目
【CateGory Index】: TN312.8;TN241
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