Suppression of Optical Fringes in Gas Spectroscopy Inside Anti-Resonant Hollow-Core Fibers by Fiber Bending

被引：0

作者：

Gomolka, Grzegorz ^{[1
]}

Gronowicz, Patrycja ^{[1
,2
]}

Filipkowski, Adam ^{[3
]}

Buczynski, Ryszard ^{[3
,4
]}

Nikodem, Michal ^{[1
]}

机构：

[1] Wroclaw Univ Sci & Technol, Dept Opt & Photon, PL-50370 Wroclaw, Poland

[2] Whitecarbon Nanores, PL-51317 Wroclaw, Poland

[3] Lukasiewicz Res Network, Dept Glass, Inst Microelect & Photon, PL-02668 Warsaw, Poland

[4] Univ Warsaw, Fac Phys, PL-02093 Warsaw, Poland

来源：

IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS | 2024年 / 30卷 / 06期

关键词：

Bending; Optical fibers; Spectroscopy; Optical fiber dispersion; Optical fiber sensors; Absorption; Methane; Anti-resonant hollow-core fiber; optical fringes suppression; laser gas spectroscopy; methane; near-infrared;

D O I：

10.1109/JSTQE.2024.3367272

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Multimodal interference is frequently pointed out as one of the main limiting factors in gas sensing setups which utilize hollow-core optical fibers as gas cells. In this paper we demonstrate suppression of optical fringes that originate from propagation of higher order modes in an anti-resonant hollow-core fiber by controlled fiber bending. Near-infrared broadband absorption spectroscopy is used to characterize the fringe patterns observed when higher order modes are excited and suppressed. A tunable laser diode emitting near 1687 nm is used to present positive impact of bending the hollow-core fiber on signals recorded with both direct absorption spectroscopy and wavelength modulation spectroscopy of methane. Bending radius of 30 mm was found optimal for the setup presented in this work, leading to sub-ppm-level detection limit at 1687 nm with 7.35-m-long fiber.

引用

页码：1 / 8

页数：8

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