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Coherence properties of supercontinuum quantified by complex degree of self-coherence

Jin Ai-Jun Wang Ze-Feng Hou Jing Guo Liang Jiang Zong-Fu Xiao Rui

Coherence properties of supercontinuum quantified by complex degree of self-coherence

Jin Ai-Jun, Wang Ze-Feng, Hou Jing, Guo Liang, Jiang Zong-Fu, Xiao Rui
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  • Received Date:  23 June 2011
  • Accepted Date:  13 October 2011
  • Published Online:  05 August 2012

Coherence properties of supercontinuum quantified by complex degree of self-coherence

  • 1. College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China;
  • 2. Beijing Institute of Radiation Medicine, Beijing 100850, China
Fund Project:  Project supported by the National Natural Science Foundation of China (Grant Nos. 11004247, 61077076), the Program for New Century Excellent Talents in University of Ministry of Education of China (Grant No. NCET-08-0142), and the Research Foundation of Education Bureau of Hunan Province, China (Grant No. YB2010B004).

Abstract: The complex degree of self-coherence is introduced to quantify the coherence of supercontinuum generated by the same long pulse, and experiments are performed. The coherence properties of supercontinuum generated in the photonic crystal fiber pumped by 700 ps pulse are measured using the Mach-Zehnder interferometer. The experimental results show that the coherence lengths of different wavelength parts of the supercontinuum are all longer than 40 m, and can reach 225 m in the long wavelength region. The coherence degrees of different parts of supercontinuum are not the same; however, the mean coherence degree over the supercontinuum is 0.461 which manifests good coherence property of the whole spectrum of supercontinuum. Consequently, requirements of many applications such as optical measurement and optical sensing can be satisfied.

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