Optical communications system using tunable tandem Fabry-Perot etalon

摘要

A tunable tandem Fabry-Perot etalon (5) is used in optical systems as a filter between two amplifier stages (3 and 7). The etalon filters the signal going from the preamplifier (3) to the amplifier (7) and provides further filtering as the output of the amplifier also passes through the etalon.