Optoelectronics Letters

, Volume 8, Issue 6, pp 422–425 | Cite as

Spectral spatial coherence of high-power multi-chip LEDs

  • Guang-ming Chen (陈光明)
  • Hua Tao (陶华)
  • Hui-chuan Lin (林恵川)
  • Zi-yang Chen (陈子阳)
  • Ji-xiong Pu (蒲继雄)Email author


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.


Propagation Distance Interference Fringe Spatial Coherence Coherent Light Fringe Visibility 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Tianjin University of Technology and Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Guang-ming Chen (陈光明)
    • 1
    • 2
  • Hua Tao (陶华)
    • 1
  • Hui-chuan Lin (林恵川)
    • 1
  • Zi-yang Chen (陈子阳)
    • 1
  • Ji-xiong Pu (蒲继雄)
    • 1
    Email author
  1. 1.College of Information Science & EngineeringHuaqiao UniversityXiamenChina
  2. 2.Fujian Institute of EducationFuzhouChina

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