Variable Optical Attenuator Settings Page - THORLABS MX10C Series User Manual

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MX10C, MX40C Series of Optical Transmitters

4.3 Variable Optical Attenuator Settings Page

To get to the Variable Optical Attenuator (VOA) Settings page, tap in the VOA monitors pane on the Home page. The VOA
provides the means for adjusting and stabilizing the output power after the modulator. Note that the power measurement units
for the entire interface are set on this page. The VOA can operate in either of two modes: 1) Constant Attenuation, and 2)
Constant Output Power.
Constant Attenuation Mode maintains a fixed attenuation level between the output of the modulator and the output port on the
front panel. Any fluctuations at the input are transferred to the output.
Constant Output Power Mode acts as a stabilizer by holding the final optical power constant independent of input fluctuations
(within controllable limits such as input power and attenuation).
Rev. F, February 21, 2020
Figure 21
Constant Attenuation Mode of the VOA
Figure 22
Constant Attenuation Mode Settings
Figure 23
Constant Optical Output Mode of the VOA
Chapter 4: Operating Instructions
Tap here to change Modes.
Tap here to select Constant
Attenuation mode.
Tap here to select Constant
Output Power mode.
VOA in Constant
Attenuation Mode
Tap here to change
attenuation level.
Tap here to change units of all
displayed power measurements.
VOA in Constant Output
Power Mode
Tap here to adjust
output power.
Not enough power to reach
the set point.
Loss of VOA calibration
due to low power.
Page 15

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