Abstract
The relationship between the temporal coherence (i.e., the coherence length) and the output power of a multi-longitudinal-mode Ar+ laser operated near the threshold current is studied. The experimental measurements show that the coherence length is a hyperbola as a function of the output power. A simple model of the multimode equal-amplitude power spectrum is employed in the theoretical analysis. Good agreement between theory and experiment is obtained. It is shown that for a multi-longitudinal-mode Ar+ laser, the product of coherence length and the output power is almost a constant.
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Mailing address: Department of Physics, Suzhou University, Suzhou, Jiangsu 215006, People's Republic of China
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Yin, J., Zhu, S., Sun, H. et al. Relationship between coherence length and output power of a multi-longitudinal-mode Ar+ laser. Appl. Phys. B 61, 111–115 (1995). https://doi.org/10.1007/BF01090980
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DOI: https://doi.org/10.1007/BF01090980