Abstract

We report temperature-induced tuning of whispering gallery mode (WGM) laser emission from a Rhodamine-B-doped polymethylmethacrylate hollow optical fiber. Lasing studies on dye-doped hollow fibers with different radii were carried out with optical pumping using a $Q$-switched Nd:YAG laser. The observed lasing modes were confirmed as WGM emission with a high quality factor of $7.58\times {10}^3$. The diameter-dependent variation in lasing spectra of these hollow fibers was investigated. A tuning range of 0.44 nm with a sensitivity of $0.011\mathrm{nm}/\mathrm{°C}$ was obtained for the lasing modes by varying the temperature from 25°C to 60°C from a dye-doped polymethylmethacrylate hollow fiber of diameter 305 μm.

© 2017 Optical Society of America

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