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Relationship between temporal coherence and laser parameters in a two-longitudinal-mode HeNe laser

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Abstract

The relationship between the temporal coherenceg (1) (τ) and laser parameters - the output relative intensity (I 1/I 2) and the frequency widthδϕ h of the longitudinal mode in a two-longitudinal-mode HeNe laser - is studied experimentally. The experimental results show that both the relative output intensity and the frequency width of the longitudinal mode have a great influence on the temporal coherenceg (1) (τ). Moreover, the spectral line-shape function of each longitudinal mode in a two-longitudinal mode HeNe laser is a Lorentzian function, with a frequency width of about 18.2 MHz. A model of the power spectrum with Gaussian amplitude distribution and equal frequency width of the longitudinal mode in a multi-longitudinal-mode gas laser is employed in the theoretical analysis. Good agreement between theory and experiment is obtained.

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Authors and Affiliations

  1. Department of Physics, Suzhou University, 215006, Suzhou, Jiangsu, People's Republic of China

    J. Yin, S. Zhu & W. Gao

  2. Joint Laboratory of Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Academica Sinica, 201800, Shanghai, People's Republic of China

    Y. Wang

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  1. J. Yin
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  2. S. Zhu
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  3. W. Gao
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  4. Y. Wang
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Yin, J., Zhu, S., Gao, W. et al. Relationship between temporal coherence and laser parameters in a two-longitudinal-mode HeNe laser. Appl. Phys. B 63, 8–11 (1996). https://doi.org/10.1007/BF01112829

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  • DOI: https://doi.org/10.1007/BF01112829

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