14 July 1998 Definition and measurement of the times-diffraction-limit number of high-power laser beams
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Proceedings Volume 3423, Second GR-I International Conference on New Laser Technologies and Applications; (1998) https://doi.org/10.1117/12.316570
Event: Second GR-I International Conference on New Laser Technologies and Applications, 1997, Olympia, Greece
Abstract
A novel definition of the times-diffraction-limit (TDL) number of a laser beam is given. A comparison is made with the commonly used beam-propagation parameter M2, which is unreliable for hard-edge beams, like those produced by unstable resonators with diffraction output coupling. The new suggested TDL number definition doesn't rely on the real beam comparison to a Gaussian beam, but on the comparison of the far-field performances of the real beam with respect to those of a uniphase beam with the same amplitude profile in the near field. A practical method is also given for the estimation of the TDL number of real beams. Finally, this procedure is applied to the high-peak-power laser beams generated by two excimer laser systems developed in ENEA.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Sarah Bollanti, Paolo Di Lazzaro, Daniele Murra, "Definition and measurement of the times-diffraction-limit number of high-power laser beams", Proc. SPIE 3423, Second GR-I International Conference on New Laser Technologies and Applications, (14 July 1998); doi: 10.1117/12.316570; https://doi.org/10.1117/12.316570
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