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Communication

Application of WGM Resonances to the Measurement of the Temperature Increment of Ho and Ho-Yb Doped Optical Fibers Pumped at 1125 and 975 nm

1
Department of Applied Physics and Electromagnetism-ICMUV, University of Valencia, C/Dr. Moliner 50, 46100 Burjassot, Spain
2
Photonics Department, Centro de Investigaciones en Óptica, Loma del Bosque 115, León 37150, Mexico
*
Authors to whom correspondence should be addressed.
Academic Editor: Saverio Avino
Sensors 2021, 21(6), 2094; https://doi.org/10.3390/s21062094
Received: 29 December 2020 / Revised: 24 February 2021 / Accepted: 15 March 2021 / Published: 17 March 2021
(This article belongs to the Special Issue Resonators Sensors)
Optical fiber characterization using whispering gallery mode resonances of the fiber itself has been demonstrated to be a powerful technique. In this work, we exploit the thermal sensitivity of whispering gallery mode resonances to characterize the pump-induced temperature increment in holmium doped and holmium-ytterbium codoped optical fibers. The technique relies on the measurement of the resonances’ wavelength shift due to temperature variation as a function of the pump power. Holmium doped fibers were pumped to the second excited level 5I6 of the Ho3+ ion using a laser diode at 1125 nm and ytterbium-holmium codoped fibers to the 2F5/2 level of the Yb3+ ion by a laser diode at 975 nm. Our results demonstrate that pumping ytterbium-holmium codoped fibers at 975 nm results in dramatic thermal effects, producing a temperature increment two orders higher than that observed in holmium doped fibers pumped with a 1125 nm laser diode. View Full-Text
Keywords: whispering gallery modes; holmium; ytterbium; doped fibers; fiber characterization; 2 μm fiber lasers whispering gallery modes; holmium; ytterbium; doped fibers; fiber characterization; 2 μm fiber lasers
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MDPI and ACS Style

Roselló-Mechó, X.; Delgado-Pinar, M.; Barmenkov, Y.O.; Kir’yanov, A.V.; Andrés, M.V. Application of WGM Resonances to the Measurement of the Temperature Increment of Ho and Ho-Yb Doped Optical Fibers Pumped at 1125 and 975 nm. Sensors 2021, 21, 2094. https://doi.org/10.3390/s21062094

AMA Style

Roselló-Mechó X, Delgado-Pinar M, Barmenkov YO, Kir’yanov AV, Andrés MV. Application of WGM Resonances to the Measurement of the Temperature Increment of Ho and Ho-Yb Doped Optical Fibers Pumped at 1125 and 975 nm. Sensors. 2021; 21(6):2094. https://doi.org/10.3390/s21062094

Chicago/Turabian Style

Roselló-Mechó, Xavier, Martina Delgado-Pinar, Yuri O. Barmenkov, Alexander V. Kir’yanov, and Miguel V. Andrés 2021. "Application of WGM Resonances to the Measurement of the Temperature Increment of Ho and Ho-Yb Doped Optical Fibers Pumped at 1125 and 975 nm" Sensors 21, no. 6: 2094. https://doi.org/10.3390/s21062094

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