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M² Factor Measurement——M²-Meter

      Beam quality and it's focusing capability are very important parameters of laser, are usually characterized by M² factor. To measure the M² factor for a laser, it is testing the difference between the product of the beam diameter and divergence, and the ideal gaussian beam diffraction limit. Through derivation the computation formula is as below:

M²-Meter Testing Instrument: M²-Meter

Detector material Si
Wavelength range 400-1100nm
Receiving beam diameter 20um-9mm
Testing output power range 10nW-10W(Depends on the beam diameter)

Example of the Testing Result



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