2021
DOI: 10.3390/polym13020205
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Tunable WGM Laser Based on the Polymer Thermo-Optic Effect

Abstract: In this work, the thermo-optic effect in polymers was used to realize a temperature-tunable whispering-gallery-mode laser. The laser was fabricated using a capillary tube filled with a light-emitting conjugated polymer solution via the capillary effect. In the whispering-gallery-mode laser emission wavelength can be continuously tuned to about 19.5 nm using thermo-optic effect of polymer. The influence of different organic solvents on the tuning rate was studied. For a typical lasing mode with a bandwidth of 0… Show more

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Cited by 12 publications
(10 citation statements)
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“…It can be seen that the lasing wavelength changes slightly with the ambient temperature. The lasing wavelength shifts from 636.9 to 634.8 nm when the temperature changes from 25 to 50 • C. The variation of the lasing peak can be attributed to the thermo-optic effect of the polymer [36]. On the whole, the stability of the laser performance is acceptable for most potential applications.…”
Section: Resultsmentioning
confidence: 99%
“…It can be seen that the lasing wavelength changes slightly with the ambient temperature. The lasing wavelength shifts from 636.9 to 634.8 nm when the temperature changes from 25 to 50 • C. The variation of the lasing peak can be attributed to the thermo-optic effect of the polymer [36]. On the whole, the stability of the laser performance is acceptable for most potential applications.…”
Section: Resultsmentioning
confidence: 99%
“…The spacing between adjacent mode clusters Δ λ is 1.56 nm caused by the two-ring coupling effect. 20 The capillary tube consists of two mismatched cylinder microrings, forming a coupled asymmetric microcavity, which causes inhibition between the two nearby ring microcavities. Fig.…”
Section: Spectra Characterization Of the Wgm Lasermentioning
confidence: 99%
“…In recent years, various geometries of polymer lasers have received signicant attention, such as Fabry-Perot structures, 11 distributed feedback structures, [12][13][14] photonic crystals, 15,16 and whispering-gallery-mode (WGM) cavities. [17][18][19][20] However, a significant limitation of the current polymer lasers is the optical pump source. More recently, polymer lasers have been optically pumped by laser diodes (LDs) or by light emitting diodes, [21][22][23][24][25][26] optimizing the compact and undoubtedly low-cost polymer laser systems, which greatly promotes their applicability.…”
Section: Introductionmentioning
confidence: 99%
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“…However, fast and wide-range tuning is challenging for crystalline resonators 16 . Currently, the most widely used tuning method is thermo-optic tuning, 17 , 18 which is applicable to WGM resonators of various materials and shapes. However, thermo-optic tuning requires controlling the external temperature of the WGM resonator, 19 resulting in a relatively slow tuning process, which cannot satisfy the demand for high response speed.…”
Section: Introductionmentioning
confidence: 99%