Hardware
limits:
Conversion time per A/D sample
1.75 µS (max)
Acquisition
Time
0.25
µS
(min)
Maximum Sampling Rate
500 kHz
6.
Turn on the DC power supplies. The POS-002 is enabled by default and will
begin operation on power-up.
7.
After the input fiber is connected and the optical power is turned on, the POS-002
will automatically stabilize the input SOP to a linearly polarized output SOP
(internal optical feedback option) or optimize the SOP to either maximize or
minimize the error signal (external electrical feedback option). Note: The standard
version uses a maximum search algorithm. Minimum search may be available by
special request.
8.
When SOP stabilization is not needed, such as in a system performance
comparison using stabilized and unstabilized input SOPs, the POS-002 can be put
into standby (disabled) mode via an RS-232 command (see section 4.4 for
details).
9.
See section 4.4 for a description of the basic operation cycle and instructions on
customizing the setup.
4.3 Testing and Characterization:
The POS-002 can be serviced only by manufacturer-authorized personnel. There are no
user serviceable components in this system.
The performance of the POS-002 can be tested with standard polarization measurement
instruments or a laboratory setup. The output SOP from the POS-002 can be monitored
by a commercial polarization analyzer. For laboratory testing, the user can insert a
manual or motorized polarization controller before the input fiber connector, and connect
the output fiber to an optical power meter or photodetector. If the POS-002 being tested
has the SM output fiber option, a polarizer should be inserted between the output fiber
connector and optical power meter. Once the POS-002 is activated, the optical power to
the power meter or photodetector will be stabilized, independent of any adjustment of the
input polarization controller.
Document #: GP-UM-POS-002-21
Page 12 of 30
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