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Fig. 4. (Color online) He-Ne laser beam profiles when (a) the distance from crystal is 24 cm and LD current is 0, (b) the distance from crystal is 24 cm and LD current is 1 A, (c) the distance from crystal is 52 cm and LD current is 0, and (c) the distance from crystal is 52 cm and LD current is 1 A.
New Phys.: Sae Mulli 2023;73:304~310 https://doi.org/10.3938/NPSM.73.304
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