THORLABS M2MS, Operating Manual

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BP209 Series 7 Operation Instructions
Page 126
21424-D02
7.2.8.4 Saving the Divergence Measurement Results
Besides the standard function "Save Divergence Measurement Results" the Thorlabs Beam
Software offers an automatic saving of beam profile data when a Divergence measurement is
executed.
For details, please see section Saving the M² Measurement Results .
Note
The Divergence measurement results cannot be saved as PDF Test Protocol, only as CSV,
TXT or XLS files.
7.2.8.5 Running the Divergence Measurement
The divergence measurement is designed to measure low divergent or convergent beam
propagation. Therefore, the measurement requires removing any focusing elements which pro-
duce a beam waist within the scan range.
Prior to starting the measurement, make sure that:
·
The beam is aligned properly - it should ideally remain centered with respect to the sensor
center over the entire scan range. See chapter
Beam Alignment for aligning the beam.
· Reflections and interferences are avoided as far as possible.
· The laser system is warmed up - depending on the source this might take up to 1 hour.
· The laser output is spatially and temporally stable.
Start the measurement by clicking the Start button .
While running the measurement, most of the buttons and options are disabled, e.g. the Diver-
gence measurement settings and the toolbar. This prevents the modification of settings during
a measurement.
If necessary, the measurement can interrupted by clicking the Stop button .
After starting the measurement the X axis of the graph is adapted to the user-defined scan
range, for example from 0 to 120 mm. The Y axis scales automatically to the recorded beam
widths.
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