Both bandstop and bandpass filters can be easily implemented with mismatched twin-core fibres designed to phase-match at certain wavelength. These filters are highly stable with very low temperature and strain sensitivity. We studied the spectral quality of these filters and that of cascaded filters designed to achieve improved bandpass response. We have also demonstrated the feasibility of achieving designed loss profile from these filters. This is very useful in gain spectrum flattening in Er-doped fibre amplifier
To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.