Newport 5600 Series - Figure 11 - Modulation Setup Menu; Frequency (Freq); Modulation Amplitude (Mod Amp); Modulation Enable (Mod Enable)

30 Chapter 3 Laser Diode Driver Operation
Modulation Setup



→
→→
→
Mod Enable= Int



Freq= 0.200 kHz



Mod Amp= 25 A



Mod Type= Sqr



Io min= 0 A






Io max= 50 A
Figure 11 - Modulation Setup Menu
3.5.4.1 Modulation Enable (Mod Enable)
The
Mod En
sets the over modulation control. The possible settings are
Off
,
Int
, and
Ext
, for off, internal, and external, respectively.
Int
is for using the
internal modulator as a modulation source.
Ext
enables the external
modulation input port.
Off
disables all modulation and shorts the modulation
input.
3.5.4.2 Frequency (Freq)
The
Freq
setting controls the modulation output frequency of the internal
modulator. When the modulation is off, changes to this setting have no
effect.
3.5.4.3 Modulation Type (Mod Type)
Mod Type
selects the output waveform, either sine or square wave. The
square wave has a fixed 50% duty cycle.
3.5.4.4 Modulation Amplitude (Mod Amp)
The
Mod Amp
value sets the waveform amplitude, which has both a
positive and negative component around the set point.
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