Abstract
We measured the spatial coherernce of a copper vapour laser (CVL) beam with an unstable resonator by the reversal shear interferometer. By this method, we can evaluate the spatial coherence function from a single-shot measurement. The spatial coherence width was 5 mm when an unstable resonator with a magnification factor of 60 was used. Moreover we verified the result by the theoretical calculation on the basis of the passive resonator model.
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Omatsu, T., Kuroda, K., Shimura, T. et al. Measurement of spatial coherence of a copper vapour laser beam using a reversal shear interferometer. Opt Quant Electron 23, S477–S484 (1991). https://doi.org/10.1007/BF00619643
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DOI: https://doi.org/10.1007/BF00619643