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Fabrication of high- polydimethylsiloxane optical microspheres for thermal sensing
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) Fine transmission spectrum of a WGM at 1446.7 nm which matches well with Lorentzian-shaped fitting line. The linewidth is about 220 MHz, corresponding to a loaded factor of . Inset: optical micrographs of PDMS microspheres with diameter . (b) Transmission spectrum in 1460 nm band of the PDMS microsphere. The transmission dips correspond to the WGM resonances.

Image of FIG. 2.
FIG. 2.

(a) Resonant wavelength shift vs excitation power. Inset shows two transmission dips corresponding to the same resonant mode, but with up- and down-wavelength scannings (blue line), respectively. The scanning frequency is 10 Hz. Here, the upper and bottom axis denote frequency and time, respectively. (b) Resonant wavelength shift of the probe WGM vs the signal power. Inset shows the schematic of the experimental setup. WDM: wavelength-division multiplexing. The red lines are linear fittings of the experimental data.

Image of FIG. 3.
FIG. 3.

Resonant wavelength shift of the WGM as a function of surrounding temperature.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Fabrication of high-Q polydimethylsiloxane optical microspheres for thermal sensing