Tunable optical filters using compound ring resonators for DWDM

The 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 cou...

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Main Authors: Vargas, Salvador, Vázquez, Carmen, Pena, José Manuel, Corredera, Pedro
Format: Artículo
Language: Inglés
Published: 2018
Subjects:
Online Access: https://ieeexplore.ieee.org/abstract/document/1215511/?part=1
http://ridda2.utp.ac.pa/handle/123456789/4896
Summary: The 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.