Tunable optical filters using compound ring resonators for DWDM

Authors: Vargas, Salvador; Vázquez, Carmen; Pena, José Manuel; Corredera, Pedro

Description: 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.
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.

Topic: Optical filters
Optical ring resonators
Wavelength division multiplexing
Mirrors
Optical fiber filters
Optical tuning
Directional couplers
Sagnac interferometers
Resonator filters
Integrated optics
Optical filters
Optical ring resonators
Wavelength division multiplexing
Mirrors
Optical fiber filters
Optical tuning
Directional couplers
Sagnac interferometers
Resonator filters
Integrated optics

Get full text: https://ieeexplore.ieee.org/abstract/document/1215511/?part=1
http://ridda2.utp.ac.pa/handle/123456789/4896