All-fiber online Raman sensor with enhancement via a Fabry–Perot cavity

Yu，Xingtao1,2; Li，Caoxin2; Hu，Dora Juan Juan3; Milenko，Karolina4; Wang，Guanghui1,2; Shum，Ping5; Xu，Fei2; Lu，Yanqing2; Zhang，Xuping1,2

2020-10-15

10.1364/OL.404404

OPTICS LETTERS   影响因子和分区

0146-9592

1539-4794

In this Letter, a novel all-fiber online Raman sensor with significant signal enhancement via a Fabry–Perot (FP) cavity is proposed and demonstrated. The FP cavity structure is formed by inserting a long-pass coated fiber and a gold-plated capillary into a silver-lined capillary with a gap. A corroded single-mode fiber is inserted into the gold-plated capillary to guide the excitation light into the FP cavity. The multiple reflections of excitation light in the FP cavity have significantly increased the interaction volume between the light and the sample. Experiment results have demonstrated an enhancement factor of 5 times in the detected Raman signal for ethanol compared to that measured using the silver-lined hollow-core fiber-based Raman cell without FP cavity, or 86 times compared with direct detection using a bare fiber tip. The measurement results are in good agreement with theoretical analyses. This Raman sensor with signal enhancement via the FP cavity has the potential to realize rapid sample replacement and online detection with high sensitivity and high accuracy for biochemical applications.

SCI ; EI

英语

其他

National Natural Science Foundation of China[61535005][61875083] ; SocialDevelopment Project of Jiangsu Province[BE2019761]

Optics

Optics

WOS:000581198200032

OPTICAL SOC AMER

20204409410764

Raman spectroscopy ; Gold coatings ; Signal detection

Information Theory and Signal Processing:716.1 ; Fiber Optics:741.1.2 ; Coating Materials:813.2

PHYSICS

2-s2.0-85093490618

Scopus

1.Key Laboratory of Intelligent Optical Sensing and Integration of the Ministry of Education,Nanjing University,Jiangsu,210009,China
2.College of Engineering and Applied Sciences,Nanjing University,Jiangsu,210093,China
3.Institute for Infocomm Research,Singapore,1 Fusionopolis Way, #21-01 Connexis,138632,Singapore
4.SINTEF Microsystems and Nanotechnology,Oslo,Gaustadalleen 23C,0737,Norway
5.Department of Electrical and Electronic Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Yu，Xingtao,Li，Caoxin,Hu，Dora Juan Juan,等. All-fiber online Raman sensor with enhancement via a Fabry–Perot cavity[J]. OPTICS LETTERS,2020,45(20):5760-5763.

Yu，Xingtao.,Li，Caoxin.,Hu，Dora Juan Juan.,Milenko，Karolina.,Wang，Guanghui.,...&Zhang，Xuping.(2020).All-fiber online Raman sensor with enhancement via a Fabry–Perot cavity.OPTICS LETTERS,45(20),5760-5763.

Yu，Xingtao,et al."All-fiber online Raman sensor with enhancement via a Fabry–Perot cavity".OPTICS LETTERS 45.20(2020):5760-5763.