This manually-adjusted, inline, variable optical attenuator (VOA)

is used for precisely balancing the signal strengths in fiber circuits

and also for balancing an optical signal when evaluating the

dynamic range of the measurement system. These in-line VOAs

include SMF-28e fiber with a 3mm jacket, and they are offered

either terminated with FC/APC connectors or non-terminated.

These attenuators are available with other connector styles; please

contact your local Thorlabs office for a quotation.