In-line fiber optic comb filter using a polished LiNbO/sub 3/ overlay waveguide for a multi-wavelength source

Summary form only given. Wavelength-division multiplexing (WDM) is one of the key solutions for providing greater bandwidth in optical communication networks. Recently, multi-layer dielectric filters, silica waveguides or diffraction gratings have been used to fabricate the WDM devices. In particular, multiwavelength erbium-doped fiber ring lasers using comb filters have been reported. In this paper, we demonstrate a side-polished fiber-optic comb filter and propose its application as a channel isolation filter for a WDM-based multi-wavelength light source.