He three times – Gentec-EO Beamage-M2 User Manual
Page 48
Beamage-M
2
User Manual Revision 2.0
48
4.14. The three times Rayleigh length are not achieved on either side of the minimum waist position
Obtaining approximately three times Rayleigh length around the minimum beam waist is mandatory to make
ISO M
2
calculation. An M
2
results lower than one is normally a good sign that this range is not reached.
To resolve this problem, a wider range around the minimum beam waist must be obtained. To do that, a
combination of these solutions can be done: