Measurement of pump-induced temperature increase in doped fibers using whispering-gallery modes

Accurate measurement of the pump-induced temperature increase in rare earth doped optical fibers has been carried out based on the excitation of whispering-gallery modes resonances of the doped fiber itself. Variations of fiber temperature are found from the wavelength shift of the resonances. The narrow bandwidth of the resonances (few hundredths of a picometer) provides a temperature resolution better than 10-2̂rm C at room temperature. The technique is all-optical and it does not require processing of the doped fiber. © 1989-2012 IEEE.

doped fibers; fiber lasers and amplifiers; fiber optics; Optical resonators; thermal heating Accurate measurement; Doped fiber; Fiber lasers and amplifiers; Rare earth doped optical fibers; Room temperature; Temperature increase; Temperature resolution; Thermal heating; Fiber lasers; Fiber optics; Optical resonators; Resonance; Fibers

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