Coherence Measurement of White Light Emission from Femtosecond Laser Propagation in Air
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JIN Zhan,
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ZHANG Jie,
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LIU Yun-Quan,
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LI Kun,
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YUAN Xiao-Hui,
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HAO Zuo-Qiang,
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ZHENG Jun,
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LU Xin,
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LI Yu-Tong,
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WANG Zhao-Hua,
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LING Wei-Jun,
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WEI Zhi-Yi
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Abstract
Strong white light emission is observed from femtosecond laser propagation in air. The divergence angle of the white light emission is measured to be about 5mrad. Young’s double-slits and a Michelson interferometer are used to investigate the coherence. The wavelength components of the white light emission are identified to have a good spatial coherence and a coherence time of about 0.5ps.
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