Development of tunable optical filter for photonic application

Abstract

A tunable optical filter (TOF), which can dynamically select a particular optical signal wavelength, is an important device in such applications as optical communication systems, optical sensing systems, and tunable laser systems. In wavelength division multiplexing (WDM) systems, one requirement is the selection of the wavelength channel that must be carried out in the wavelength domain. Thus, the TOF is highly desirable in such systems. The next generation of reconfigurable optical networks raises the request for TOFs with large tuning range, simple tuning mechanism, low insertion loss, narrow bandwidth, high rejection ratio, high tuning speed and cost effectiveness.