Vázquez García, María CarmenVargas Palma, Salvador ElíasSánchez-Pena, José ManuelCorredera, Pedro2008-05-152008-05-152003-08IEEE Phtotonics Technology Letters, vol. 15, nº 8, ago. 2003, pp. 1085-10871041-1135https://hdl.handle.net/10016/2572The device is based on a loop mirror in a ring resonator. The loop mirror allows tuning by changing the coupling coefficient of a directional coupler. The loop mirror is implemented using a Sagnac configuration to have the same optical path between the signals to be interfered (copropagating and counterpropagating ones). The filter structure allows optical integration for having higher free-spectral ranges. Simple design equations for the filter parameters and the tuning are reported. Measurements on a passive optical fiber tunable filter are presented. There is a good agreement between measurements and theory.application/pdfengmirrorsoptical fibre filtersresearch articleElectrónica10.1109/LPT.2003.815328open access