High-Efficiency Inscription of Fiber Bragg Grating Array with High-Energy Nanosecond-Pulsed Laser Talbot Interferometer

Zhang, Zhe; Xu, Baijie; He, Jun; Hou, Maoxiang; Bao, Weijia; Wang, Yiping

doi:10.3390/s20154307

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High-Efficiency Inscription of Fiber Bragg Grating Array with High-Energy Nanosecond-Pulsed Laser Talbot Interferometer

by

Zhe Zhang

^1,2,

Baijie Xu

^1,2,

Jun He

^1,2,3,*

,

Maoxiang Hou

^1,4,

Weijia Bao

^1,2,3 and

Yiping Wang

^1,2,3

¹

Guangdong and Hong Kong Joint Research Centre for Optical Fiber Sensors, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China

²

Guangdong Laboratory of Artificial Intelligence and Digital Economy (SZ), Shenzhen University, Shenzhen 518060, China

³

Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China

⁴

School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China

^*

Author to whom correspondence should be addressed.

Sensors 2020, 20(15), 4307; https://doi.org/10.3390/s20154307

Submission received: 17 June 2020 / Revised: 22 July 2020 / Accepted: 30 July 2020 / Published: 1 August 2020

(This article belongs to the Section Optical Sensors)

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Abstract

A high-energy nanosecond-pulsed ultraviolet (UV) laser Talbot interferometer for high-efficiency, mass production of fiber Bragg grating (FBG) array was experimentally demonstrated. High-quality FBG arrays were successfully inscribed in both H₂-free and H₂-loaded standard single-mode fibers (SMFs) with high inscription efficiency and excellent reproducibility. Compared with the femtosecond pulse that had a coherent length of several tens of micrometers, a longer coherent length (~10 mm) of the employed laser rendered a wider FBG wavelength versatility over 700 nm band (1200–1900 nm) without the need for optical path difference (OPD) compensation. Dense FBG array with center wavelength separation of ~0.4 nm was achieved and more than 1750 FBGs with separated center wavelength could be inscribed in a single H₂-free or H₂-loaded SMF in theory, which is promising for mass production of FBG arrays in industry. Moreover, precise focusing of laser beam was superfluous for the proposed system due to the high energy density of pulse. The proposed FBG inscription system was promising for industrialization production of dense FBG arrays.

Keywords: fiber Bragg grating array; laser Talbot interferometer; mass production

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MDPI and ACS Style

Zhang, Z.; Xu, B.; He, J.; Hou, M.; Bao, W.; Wang, Y. High-Efficiency Inscription of Fiber Bragg Grating Array with High-Energy Nanosecond-Pulsed Laser Talbot Interferometer. Sensors 2020, 20, 4307. https://doi.org/10.3390/s20154307

AMA Style

Zhang Z, Xu B, He J, Hou M, Bao W, Wang Y. High-Efficiency Inscription of Fiber Bragg Grating Array with High-Energy Nanosecond-Pulsed Laser Talbot Interferometer. Sensors. 2020; 20(15):4307. https://doi.org/10.3390/s20154307

Chicago/Turabian Style

Zhang, Zhe, Baijie Xu, Jun He, Maoxiang Hou, Weijia Bao, and Yiping Wang. 2020. "High-Efficiency Inscription of Fiber Bragg Grating Array with High-Energy Nanosecond-Pulsed Laser Talbot Interferometer" Sensors 20, no. 15: 4307. https://doi.org/10.3390/s20154307

APA Style

Zhang, Z., Xu, B., He, J., Hou, M., Bao, W., & Wang, Y. (2020). High-Efficiency Inscription of Fiber Bragg Grating Array with High-Energy Nanosecond-Pulsed Laser Talbot Interferometer. Sensors, 20(15), 4307. https://doi.org/10.3390/s20154307

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High-Efficiency Inscription of Fiber Bragg Grating Array with High-Energy Nanosecond-Pulsed Laser Talbot Interferometer

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