MX10B, MX40B Series of Optical Transmitters
Chapter 4: Operating Instructions
Page 20
TTN048897-D02
4.5 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 MZM.
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.
Figure 34
Constant Attenuation Mode of the VOA
Constant Attenuation Mode maintains a fixed attenuation level between the output of the MZM and the output port on the front
panel. Any fluctuations at the input are transferred to the output.
Figure 35
Constant Attenuation Mode Settings
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).
Figure 36
Constant Optical Output Mode of the VOA
Tap here to change Modes.
Tap here to select Constant
Attenuation mode.
Tap here to select Constant
Output Power mode.
Tap here to change units of all
displayed power measurements.
VOA Mode Set to Constant
Attenuation
Tap here to change
attenuation level.
Waning indicates loss of VOA
calibration due to low power.
VOA Mode Set to Constant
Output Power
Tap here to adjust
output power.
Loss of VOA calibration
due to low power.
