OXXIUS L4Cc - Page 77

77
APC MODE, ANALOG MODULATION
Here is a typical characteristic curve of a LaserBoxx LBX or LCX modulated by an external voltage, in APC
mode:
The characteristic curve is linear between 0V and 5V, the maximum reachable value being the last internal
set point entered (80mW in the example above).
Refer to the specifications of your combiner for exact speed and modulation characteristics.
ACC MODE, INTERNAL SET POINT
Here is a typical characteristic curve of a LaserBoxx LBX driven by an internal set point, in ACC mode:
The characteristic curve is as follows:
- The output power almost nil between 0mA and the threshold current,
- From the threshold current and above, the relationship between the current and the optical power is
linear
- The maximum allowable value is 120% of the nominal current
0
10
20
30
40
50
60
70
80
0 1 2 3 4 5
Output power (mW)
Modulation input voltage (V)
0
10
20
30
40
50
60
70
0% 25% 50% 75% 100% 125%
Output power (mW)
Current set point (% of the nominal current)