Abstract
Beam quality is a measure of how tightly a beam can be focused. The higher the beam quality, the smaller the spot size and the higher the laser intensity. According to the ISO-standard [4.1] this property can be characterized by the beam-parameter product (Q or BPP), multiplying the waist radius (w 0) and the far-field divergence (θ 0) of the beam. In the best case, i.e., without any aberrations, this beam-parameter product remains constant, if the beam is transformed by passive optical components such as lenses or mirrors (Eq. 4.1).
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Loosen, P., Knitsch, A. (2007). Incoherent Beam Superposition and Stacking. In: Bachmann, F., Loosen, P., Poprawe, R. (eds) High Power Diode Lasers. Springer Series in Optical Sciences, vol 128. Springer, New York, NY. https://doi.org/10.1007/978-0-387-34729-5_4
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DOI: https://doi.org/10.1007/978-0-387-34729-5_4
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