光电子快报(英文版), 2012, 8 (6): 422, Published Online: Jul. 12, 2017
Spectral spatial coherence of high-power multi-chip LEDs
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.
CHEN Guang-ming, TAO Hua, LIN Hui-chuan, CHEN Zi-yang, PU Ji-xiong. Spectral spatial coherence of high-power multi-chip LEDs[J]. 光电子快报(英文版), 2012, 8(6): 422.