THORLABS MX40G Series, User Manual, Page: 21 / 44

MX40G, MX70G Series of E-O Converters Chapter 4: Operating Instructions
Rev. E, March 19, 2019 Page 17
4.4.2 Peak Mode
The Peak Mode adjusts the DC bias voltage so the transmission is centered at a nearby transmission maximum. In this mode
only dither frequency and amplitude settings are available. These controls and settings are the same as previously described
for the Quadrature mode.
Peak and Null modes are often used to obtain phase modulation and non-linear frequency doubling. The optical phase is 180°
shifted on opposite sides of the Null point.
Figure 26 Peak Mode Settings
4.4.3
Null Mode
The Null Mode adjusts the DC bias voltage so the transmission is centered at a nearby transmission minimum. In the Null
mode only dither frequency and amplitude settings are available. These settings are the same as previously described for the
Quadrature mode
Figure 27 Null Mode Settings
Peak mode is active, tap this
field to change.
Tap here to reset the Bias
calibration and return to
Peak mode.
Null mode is active, tap this field
to change.
Tap here to reset the Bias
calibration and return to Null
mode.