• Optoelectronics Letters
  • Vol. 8, Issue 6, 422 (2012)
Guang-ming CHEN1、2, Hua TAO1, Hui-chuan LIN1, Zi-yang CHEN1, and Ji-xiong PU1、*
Author Affiliations
  • 1College of Information Science & Engineering, Huaqiao University, Xiamen 361021, China
  • 2Fujian Institute of Education, Fuzhou 350025, China
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    Abstract

    We investigate the spatial coherence of the light generated from high-power multi-chip red LEDs by using the van Cittert- Zernike theorem. It is theoretically demonstrated that the light generated from multi-chip LEDs evolves into partially coherent light after propagation, and the spatial coherence is increased with the increase of propagation distance. Moreover, the spatial coherence of the light is found to be closely related to the chip distribution of multi-chip LEDs. The distribution of the spatial coherence of the light is experimentally examined by Young’s double-slit interference. It is found that the experimental results are consistent with the theoretical ones.
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    CHEN Guang-ming, TAO Hua, LIN Hui-chuan, CHEN Zi-yang, PU Ji-xiong. Spectral spatial coherence of high-power multi-chip LEDs[J]. Optoelectronics Letters, 2012, 8(6): 422
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    Received: Aug. 18, 2012
    Accepted: --
    Posted: Jun. 1, 2012
    Published Online: Jul. 12, 2017
    The Author Email: Ji-xiong PU (jixiong@hqu.edu.cn)