Electrospinning is a very simple method of preparing polymer solutions into high performance fibers. In this work, PM597-doped polymer fibers with different diameters have been fabricated by electrospinning technology. Whispering gallery mode (WGM) lasing emission was observed when a 532 nm pulse laser beam radially excited the single electrospun polymer fiber (EPF) created by this method. The distribution of WGMs is also quantitatively confirmed through theoretical calculation. Additionally, the number of WGM laser peaks decrease as the diameter of the EPF decreases. Single longitudinal mode laser emission can be obtained when the EPF diameter decreases to 8.8m. It has also been found that the WGM laser from the single EPF has relatively low thresholds and good lifetime compared to droplet lasers or other fiber lasers. Moreover, EPF networks have unique research prospects in photonic devices, optical pump lasers and biosensing due to their very large surface to volume ratio.
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Funding: National Natural Science Foundation of China
(11874012, 11404087, 11574070, 51771186, 11404086,
11874126, 61501165); Fundamental Research Funds for the
Central Universities ((JZ2019HGPA0099;
PA2018GDQT0006); Project of State Key Laboratory of
Environment-friendly Energy Materials, Southwest
University of Science and Technology (19fksy0111); Anhui
Province Key Laboratory of Environment-friendly Polymer
Materials (KF2019001); the European Union’s Horizon 2020
research and innovation programme under the Marie
Skłodowska-Curie grant agreement No 744817; STCSM;
China Postdoctoral Science Foundation (2015M571917,
- polymer fiber
- whispering gallery mode