Silica Hollow-Core Negative Curvature Fibers Enable Ultrasensitive Mid-Infrared Absorption Spectroscopy

Chenyu Yao; Shoufei Gao; Yingying Wang; Pu Wang; Wei Jin; Wei Ren

doi:10.1109/JLT.2019.2960804

Silica Hollow-Core Negative Curvature Fibers Enable Ultrasensitive Mid-Infrared Absorption Spectroscopy

Chenyu Yao, Shoufei Gao, Yingying Wang, Pu Wang, Wei Jin, Wei Ren

Research output: Journal article publication › Journal article › Academic research › peer-review

41 Citations (Scopus)

Abstract

Ultrasensitive mid-infrared absorption spectroscopy is demonstrated by the use of a novel silica-based hollow-core negative curvature fiber (HC-NCF). The HC-NCF used in this article consists of a single ring of six nontouching cladding capillaries around the hollow core, thus forming a unique core boundary with a negative curvature. Such a silica HC-NCF enables the broadband single-mode transmission in the mid-infrared. By using the HC-NCF as a compact gas cell, a proof-of-principle experiment is conducted to detect the N₂O line at 2778.37 cm^-1 with a distributed-feedback interband cascade laser emitting at 3.6 μm. A minimum detectable absorbance of 3 × 10^-5 is achieved for a fiber length of 120 cm, corresponding to a noise equivalent absorption (NEA) coefficient of 2.5 × 10^-7 cm^-1. Silica HC-NCFs offer a new opportunity of developing sensitive and compact gas sensors using mid-infrared absorption spectroscopy.

Original language	English
Article number	8938694
Pages (from-to)	2067-2072
Number of pages	6
Journal	Journal of Lightwave Technology
Volume	38
Issue number	7
DOIs	https://doi.org/10.1109/JLT.2019.2960804
Publication status	Published - Dec 2019

Keywords

Gas sensor
hollow core fiber
microstructured optical fiber
mid-infrared absorption spectroscopy
optical fiber sensor

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

More information

10.1109/JLT.2019.2960804

Cite this

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title = "Silica Hollow-Core Negative Curvature Fibers Enable Ultrasensitive Mid-Infrared Absorption Spectroscopy",

abstract = "Ultrasensitive mid-infrared absorption spectroscopy is demonstrated by the use of a novel silica-based hollow-core negative curvature fiber (HC-NCF). The HC-NCF used in this article consists of a single ring of six nontouching cladding capillaries around the hollow core, thus forming a unique core boundary with a negative curvature. Such a silica HC-NCF enables the broadband single-mode transmission in the mid-infrared. By using the HC-NCF as a compact gas cell, a proof-of-principle experiment is conducted to detect the N2O line at 2778.37 cm-1 with a distributed-feedback interband cascade laser emitting at 3.6 μm. A minimum detectable absorbance of 3 × 10-5 is achieved for a fiber length of 120 cm, corresponding to a noise equivalent absorption (NEA) coefficient of 2.5 × 10-7 cm-1. Silica HC-NCFs offer a new opportunity of developing sensitive and compact gas sensors using mid-infrared absorption spectroscopy.",

keywords = "Gas sensor, hollow core fiber, microstructured optical fiber, mid-infrared absorption spectroscopy, optical fiber sensor",

author = "Chenyu Yao and Shoufei Gao and Yingying Wang and Pu Wang and Wei Jin and Wei Ren",

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AU - Gao, Shoufei

AU - Wang, Yingying

AU - Wang, Pu

AU - Jin, Wei

AU - Ren, Wei

PY - 2019/12

Y1 - 2019/12

N2 - Ultrasensitive mid-infrared absorption spectroscopy is demonstrated by the use of a novel silica-based hollow-core negative curvature fiber (HC-NCF). The HC-NCF used in this article consists of a single ring of six nontouching cladding capillaries around the hollow core, thus forming a unique core boundary with a negative curvature. Such a silica HC-NCF enables the broadband single-mode transmission in the mid-infrared. By using the HC-NCF as a compact gas cell, a proof-of-principle experiment is conducted to detect the N2O line at 2778.37 cm-1 with a distributed-feedback interband cascade laser emitting at 3.6 μm. A minimum detectable absorbance of 3 × 10-5 is achieved for a fiber length of 120 cm, corresponding to a noise equivalent absorption (NEA) coefficient of 2.5 × 10-7 cm-1. Silica HC-NCFs offer a new opportunity of developing sensitive and compact gas sensors using mid-infrared absorption spectroscopy.

AB - Ultrasensitive mid-infrared absorption spectroscopy is demonstrated by the use of a novel silica-based hollow-core negative curvature fiber (HC-NCF). The HC-NCF used in this article consists of a single ring of six nontouching cladding capillaries around the hollow core, thus forming a unique core boundary with a negative curvature. Such a silica HC-NCF enables the broadband single-mode transmission in the mid-infrared. By using the HC-NCF as a compact gas cell, a proof-of-principle experiment is conducted to detect the N2O line at 2778.37 cm-1 with a distributed-feedback interband cascade laser emitting at 3.6 μm. A minimum detectable absorbance of 3 × 10-5 is achieved for a fiber length of 120 cm, corresponding to a noise equivalent absorption (NEA) coefficient of 2.5 × 10-7 cm-1. Silica HC-NCFs offer a new opportunity of developing sensitive and compact gas sensors using mid-infrared absorption spectroscopy.

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KW - microstructured optical fiber

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Silica Hollow-Core Negative Curvature Fibers Enable Ultrasensitive Mid-Infrared Absorption Spectroscopy

Abstract

Keywords

ASJC Scopus subject areas

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