Microsphere-assisted Fabry–Perot interferometry: proof of concept

Weicheng Wang; Chunlei Jiang; Shaopeng Tian; Peng Chen; Kaichuan Xu; Hao Wu; Lun Yan; Yan Lu

doi:10.1364/AO.455341

Applied Optics
Vol. 61,
Issue 18,
pp. 5442-5448
(2022)
•https://doi.org/10.1364/AO.455341

Microsphere-assisted Fabry–Perot interferometry: proof of concept

Weicheng Wang, Chunlei Jiang, Shaopeng Tian, Peng Chen, Kaichuan Xu, Hao Wu, Lun Yan, and Yan Lu

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Weicheng Wang, Chunlei Jiang, Shaopeng Tian, Peng Chen, Kaichuan Xu, Hao Wu, Lun Yan, and Yan Lu, "Microsphere-assisted Fabry–Perot interferometry: proof of concept," Appl. Opt. 61, 5442-5448 (2022)

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Related Topics
Table of Contents Category
- Fiber Optics, Fiber Sensors, and Optical Communications
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About this Article
History
- Original Manuscript: February 1, 2022
- Revised Manuscript: April 28, 2022
- Manuscript Accepted: May 19, 2022
- Published: June 16, 2022

Abstract

We propose a microsphere-assisted Fabry–Perot interferometry (MAFPI) for microstructure measurement. We stretch the single-mode fiber and combine it with microspheres of different sizes and refractive indices, which can form super-focused spots with different characteristics, that is, a photonic nanojet phenomenon. As a proof of principle, we performed scanning imaging of optical discs and holographic gratings by MAFPI. The optical disc image obtained by MAFPI is consistent with the result obtained by a scanning electron microscope, and the obtained grating image is consistent with the actual result.

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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Characteristic	1 µm	1.2 µm	2 µm	3 µm	5 µm	8 µm
$f$ (µm)	0.177	0.22	0.3	1	1.4	2.3
$I_{max}$ (V/m)	1817	1940	2056	2112	2255	2588
FWHM (µm)	0.35	0.5	0.6	0.8	0.95	1.2
$D_{f}$ (µm)	1.6	1.68	2	3	4.2	5.8

Characteristic	1 µm	1.2 µm	2 µm	3 µm	5 µm	8 µm
$f$ (µm)	0.16	0.2	0.28	0.7	1	1.5
$I_{max}$ (V/m)	1885	2046	2207	2255	2323	2634
FWHM (µm)	0.34	0.36	0.4	0.5	0.75	1
$D_{f}$ (µm)	1.16	1.21	1.3	1.6	2.6	3.6

Characteristic	1 µm	1.2 µm	2 µm	3 µm	5 µm	8 µm
$f$ (µm)	0.177	0.22	0.3	1	1.4	2.3
$I_{max}$ (V/m)	1817	1940	2056	2112	2255	2588
FWHM (µm)	0.35	0.5	0.6	0.8	0.95	1.2
$D_{f}$ (µm)	1.6	1.68	2	3	4.2	5.8

Characteristic	1 µm	1.2 µm	2 µm	3 µm	5 µm	8 µm
$f$ (µm)	0.16	0.2	0.28	0.7	1	1.5
$I_{max}$ (V/m)	1885	2046	2207	2255	2323	2634
FWHM (µm)	0.34	0.36	0.4	0.5	0.75	1
$D_{f}$ (µm)	1.16	1.21	1.3	1.6	2.6	3.6

Abstract

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Figures (8)

Tables (2)

Equations (3)

Applied Optics