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7.2 Explaining the laser behavior – example with a 300 mW laser
7.2.1 Laser set at nominal power (IP=100)
Until a stabilized power level is reached, the laser’s power will vary during its start-up phase.. Typically, the
output power slightly overshoots then converges to its nominal power level (as depicted in the graph below).
Starting up at IP 100
350
Starting up
Laser On
300
100
IP
80
Power
200
60
150
IP (%)
Power (mW)
250
40
100
20
50
0
0
0
1
2
3
4
5
6
7
Time (min)
7.2.2 Starting up at less than the nominal output power (IP=30)
When the laser set below its nominal power level, it first starts-up at nominal power, then stabilizes for a few
seconds and finally goes down to reach the set output power:
Starting up at IP 30
350
Starting up
Power
Laser On
300
100
80
200
60
150
IP
40
100
20
50
0
0
0
1
2
3
4
5
Time (min)
47
6
7
8
9
IP (%)
Power (mW)
250