MOGlabs MWM, Manual, Page: 40 / 96

32
Chapter 5. Signal out and PID
5.1
MOGL
abs
DLC
laser controller
If using the
MWM
with a
MOGL
abs laser and
DLC
controller, connect the
MWM SMA
output to the
DLC SWEEP
input and set
DIP 9
on (external piezo
stack control); see figure below. Set both the offset and windup parameters
to 1.25 V. Use the
DLC SPAN
knob as a master gain on the
PID
feedback.
The
SCAN/LOCK
and fast lock should be off (up); only slow (piezo) feedback
will be active through the
SWEEP
control.
Laser
Wavelength stabilised
DLC Diode Laser Controller
MWM
SWEEP/PZT
Figure 5.1:
Stabilising a laser frequency with the MWM and PID . The SMA
output of the MWM should be connected to the SWEEP/PZT input on the rear
of the MOGLabs DLC controller.
5.2 PID parameters
PID
servo output can be calculated and controlled by the host computer and
mogwave
, or from the
MWM
device operating standalone. In the latter case,
the parameters can be set using the on-device menus with
LCD
display
and pushbuttons, or using the web interface (see chapter 3), or using the
mogwave
PID
menu action.
Setpoint λ
0
Defines the reference wavelength
λ
0
, for the the currently active
measurement
wavelength units set in the main
mogwave
window or on the
device.