MOGlabs FZW600, Manual

Page: 5 / 52

Getting started
1.
Connect to +5 V power
via the
USB
port or the
DC
barrel jack.
When powering with USB , it is important that the host can
supply up to 600 mA. Some older computers may detect this as
a short-circuit and power down the device; USB -3.0 compliant
hubs are recommended.
2.
Power on
using the rocker switch on the rear.
3.
Connect fibre
using the supplied fibre patchcord. Typically
this is
FC/PC
(black) on one end and
FC/APC
(green) on the
other. The FC/PC side must be connected to the FZW .
If the device was ordered with the
FC/APC
option (as indicated
on the chassis), the supplied fiber is FC/APC on both ends and
either end can be connected to the FZW input.
Single-mode fibres are strongly preferred, although small-core
multi-mode fibres (up to 62
.
5
µ
m) can be used at the expense
of reduced accuracy.
1
4.
Input light
with the supplied free-space to fibre adapter. Typi-
cally the FZW only needs a few microwatts to operate, so high
coupling efficiency is not required. The
saturation
(Figure 1)
is a measure of the power reaching the detector
The auto-exposure algorithm tunes the exposure time to match
the input power and optimise the measurement rate. In some
cases it may be preferable to set the exposure time manually,
such as when performing maintenance on the source laser and
the laser output power tends to fluctuate rapidly.
That’s it: with a coupled fiber you should be able to read the wa-
velength within two seconds of power-on. It is recommended to
1
Absolute accuracy specifications are only valid when using single-mode fibres.
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