An alternative approach to determine the spot-size of a multi-mode laser beam and its application to diode laser beams
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An alternative approach is suggested to determine the spot-size of a multi-mode laser beam. It has been shown by simulations that the suggested approach can give the beam quality factor and characteristic radius with less than 5% error. Unlike the power content method, the proposed method is applicable to the beams even with diameter one tenth of the CCD size. The new approach has been applied to a multi-mode diode laser output and it is shown that the ABCD matrix analysis can be used for beam propagation, with the measured parameters of the laser.
KeywordsMulti mode beam M2 parameter diode laser
PACS Nos42.60.Jf 42.55.Px
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