Gold film effect on temperature compensation of a POF sensor with different structures

Yanjun Hu; Yulong Hou; Junsheng Zhang

doi:10.1364/AO.489521

Applied Optics
Vol. 62,
Issue 17,
pp. 4474-4481
(2023)
•https://doi.org/10.1364/AO.489521

Gold film effect on temperature compensation of a POF sensor with different structures

Yanjun Hu, Yulong Hou, and Junsheng Zhang

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Yanjun Hu, Yulong Hou, and Junsheng Zhang, "Gold film effect on temperature compensation of a POF sensor with different structures," Appl. Opt. 62, 4474-4481 (2023)

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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: March 9, 2023
- Revised Manuscript: May 2, 2023
- Manuscript Accepted: May 11, 2023
- Published: June 2, 2023

Abstract

In this paper, temperature compensation of plastic optical fiber (POF) is studied and gold absorbability is utilized. Gold film is modified on the surface of POF by magnetron sputtering. The temperature output characteristics of different structures such as ordinary (POF-N), side-polished (POF-SP), U-shaped (POF-U), and narrow groove structure (POF-NGS) are tested, and the effects of gold film thickness, polishing area, and sputtering sequence on the temperature output characteristics are also investigated. The power change of the sensor at different temperatures is recorded. The experimental results show that when the temperature is between 25°C and 50°C and the sputtering gold film thickness is 50 nm, the temperature stabilities of POF-N, POF-U, POF-SP, and POF-NGS are 1.02 µW/°C, 0.77 µW/°C, 0.18 µW/°C, and 0.35 µW/°C, respectively. The compensation effect is enhanced as the gold film thickness increases. When the thickness is 100 nm, the temperature stability of POF-NGS is 0.06 µW/°C. The proposed temperature compensation method is competitive and straightforward.

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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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Before Sputtering Process	Insertion Loss (dB)	After Sputtering Process (50 nm Gold)	Insertion Loss (dB)
POF-N	0.01	POF-N (Au)	0.02
POF-SP	1.08	POF-SP (Au)	1.68
POF-NGS	0.81	POF-NGS (Au)	1.37
POF-U	0.66	POF-U (Au)	1.15

Structure	Linearity	Fitting Curve without Gold	Fitting Curve with Gold
POF-N	1.02 µW/°C	$y = 0.021 x^{2} - 0.56 x + 0.73$	$y = 1.02 x - 27.98$
POF-U	0.77 µW/°C	$y = 1.85 x - 48.9$	$y = 0.77 x - 20.84$
POF-SP	0.18 µW/°C	$y = 1.58 x - 43$	$y = 0.18 x - 4.28$
POF-NGS	0.35 µW/°C	$y = 1.92 x - 53.1$	$y = 0.35 x - 9.22$

Before Sputtering Process	Insertion Loss (dB)	After Sputtering Process (50 nm Gold)	Insertion Loss (dB)
POF-N	0.01	POF-N (Au)	0.02
POF-SP	1.08	POF-SP (Au)	1.68
POF-NGS	0.81	POF-NGS (Au)	1.37
POF-U	0.66	POF-U (Au)	1.15

Structure	Linearity	Fitting Curve without Gold	Fitting Curve with Gold
POF-N	1.02 µW/°C	$y = 0.021 x^{2} - 0.56 x + 0.73$	$y = 1.02 x - 27.98$
POF-U	0.77 µW/°C	$y = 1.85 x - 48.9$	$y = 0.77 x - 20.84$
POF-SP	0.18 µW/°C	$y = 1.58 x - 43$	$y = 0.18 x - 4.28$
POF-NGS	0.35 µW/°C	$y = 1.92 x - 53.1$	$y = 0.35 x - 9.22$

Abstract

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Applied Optics