Leandro González, DanielMiguel Soto, Verónica dePérez Herrera, Rosa AnaBravo Acha, MikelLópez-Amo Sáinz, Manuel2021-04-232021-04-232016D. Leandro, V. deMiguel Soto, R. A. Perez-Herrera, M. Bravo Acha and M. López-Amo, 'Random DFB Fiber Laser for Remote (200 km) Sensor Monitoring Using Hybrid WDM/TDM,' in Journal of Lightwave Technology, vol. 34, no. 19, pp. 4430-4436, 1 Oct.1, 2016, doi: 10.1109/JLT.2016.2547868.0733-872410.1109/JLT.2016.2547868https://academica-e.unavarra.es/handle/2454/39595In this paper, a random distributed feedback fiber laser is proposed as a multiplexing scheme for ultralong range measurements (up to 200 km). Optical fiber sensors are time and wavelength multiplexed overcoming one of the main limitations of long-range sensing setups, which is their limited multiplexing capability. The direct modulation of the laser's cavity allows the interrogation of sensors by measuring the reflected power for different wavelengths and distances. Fiber Bragg gratings placed at different fiber locations and wavelengths have been interrogated in two different sensor networks. In addition, in order to improve the performance of the system, some features have been analyzed.7 p.application/pdfeng© 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other work.Random distributed-feedback fiber laserMultiplexingOptical fiber sensorsTime division multiplexingWavelength division multiplexinginfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccess