Recommendations - THORLABS INT-COM-1300 Operation Manual

3 Detailed Description

3.7 Recommendations

It has been observed, that some combinations of FC/APC patch cords and FC
adaptors from different vendors may lead to different insertion loss values. Thorlabs
is testing insertion loss specification using FC/APC patch cords made by Thorlabs as
well as made by Diamond. If insertion loss of the INT-COM-1300 seems to be too
high (higher than listed in specification), please try another FC/APC patch cord
and/or adapter combination.
It is not recommended to remove FC adaptors to clean the inner FC/APC connectors.
Do not try to open the unit. If you suspect a contaminated connector please contact
Thorlabs GmbH for a solution.
Although the OUTPUT signal is nearly independent to input polarization changes, a
stable input polarization during measurement is recommended in order to increase
accuracy. Fixing the input fiber to the optical table surface is sufficient in most cases.
Please note, that the INT-COM-1300 can also operate outside the specified
wavelength range. It will generate expedient output signals, but Specifications cannot
be guaranteed.
It is not necessary to switch off aiming laser during measurement. The aiming light
will not affect the measurement. It is blocked by the WDM coupler and the circulator.
Furthermore, the wavelength of aiming light is far below the detectors' operating
wavelength range.
The aiming laser's wavelength may differ from 660nm. Lasers operating at 635nm as
well as other visible laser sources are suitable, but a maximum coupling efficiency
due to the WDM coupler is reached at 660nm. Lasers with multimode pigtail can be
used, at a remarkably increased insertion loss from 660nm IN to PROBE in this case.
INT-COM-1300 / page 15