Sánchez González, ArturoPérez Herrera, Rosa AnaRoldán Varona, PabloDurán Escudero, MiguelRodríguez Cobo, LuisLópez Higuera, José MiguelLópez-Amo Sáinz, Manuel2022-09-202022-09-202022A Dual-Wavelength Fiber Laser Sensor with Temperature and Strain Discrimination, Sensors, vol. 22, no. 18, p. 6888, Sep. 2022, doi: 10.3390/s221868881424-822010.3390/s22186888https://academica-e.unavarra.es/handle/2454/44087This work presents a dual-wavelength C-band erbium-doped fiber laser assisted by an artificial backscatter reflector. This fiber-based reflector, inscribed by femtosecond laser direct writing, was fabricated into a single mode fiber with a length of 32 mm. The dual-wavelength laser obtained, centered at 1527.7 nm and 1530.81 nm, showed an optical signal-to-noise ratio over 46 dB when pumped at 150 mW. Another feature of this laser was that the power difference between the two channels was just 0.02 dB, regardless of the pump power, resulting in a dual emission laser with high equalization. On the other hand, an output power level and a central wavelength instability as low as 0.3 dB and 0.01 nm were measured, in this order for both channels. Moreover, the threshold pump power was 40 mW. Finally, the performance of this dual-wavelength fiber laser enhanced with a random reflector for sensing applications was studied, achieving the simultaneous measurement of strain and temperature with sensitivities around 1 pm/µε and 9.29 pm/°C, respectively.application/pdfeng© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.Artificial backscatter reflectorC-bandErbium-doped fiber laserFemtosecond laserLongitudinal mode behaviorMultiparameter sensorRandom fiber gratingSimultaneous measurementinfo:eu-repo/semantics/article2022-09-20Acceso abierto / Sarbide irekiainfo:eu-repo/semantics/openAccess