Numerical Modelling of the Optical-Acoustical Characterization of an Anti-Resonant Bragg Hollow Core Fiber

Shi, Ying1; Zhou, Yilin2; Ni, Wenjun2; Tian, Yongsheng2; Lian, Zhenggang3; Shum, Perry Ping4

2023-07-01

10.3390/photonics10070814

PHOTONICS   影响因子和分区

2304-6732

Anti-resonant hollow core fibers (AR-HCFs) provide a promising solution for photothermal spectroscopy and photoacoustic imaging applications. Here, the AR-HCF serves as a micro platform to induce the photothermal/photoacoustic effect. Since the Bragg structure can induce multiple AR effects compared with the general AR-HCF, we proposed a novel device, the AR-BHCF (AR-HCF with Bragg cladding), to enhance the excitation efficiency. The simulation and experimental results validate that the AR-BHCF dominates in having a stronger ability to confine the optical field in the air core indeed. Then, the acoustic signal stimulated by the photoacoustic effect will propagate along with the fiber axial, and part of it will penetrate out of the AR-BHCF. The results revealed that the transmission bandwidth of the acoustic wave in the AR-BHCF ranges from 1 Hz to 1 MHz, covering infrasound to ultrasound. In particular, a constant coefficient of 0.5 exists in the acoustic wave fading process, related to the propagation frequency and time. The acoustic signal can be monitored in real time, assisted by the ultra-highly sensitive sensor head. Therefore, BHCF-based devices combined with photoacoustic techniques may accelerate their sensing applications. Meanwhile, this scheme shines a light on the theoretical foundation of novel short-haul distributed acoustic sensing.

multiple AR effects AR-BHCF photoacoustic effect acoustic wave

SCI

英语

其他

National Natural Science Foundation of China["62105373","62171487"] ; Knowledge Innovation Program of Wuhan-Shuguang Project[2022010801020408] ; Fundamental Research Funds for the Central Universities of the South-Central MinZu University[CZZ22001]

Optics

Optics

WOS:001036431700001

MDPI

Web of Science

1.South Cent Minzu Univ, Innovat & Entrepreneurship Coll, Expt Teaching & Engn Training Ctr, Wuhan 430074, Peoples R China
2.South Cent Minzu Univ, Coll Elect & Informat Engn, Hubei Key Lab Intelligent Wireless Commun, Wuhan 430074, Peoples R China
3.Yangtze Opt Elect Co, Fifth Hitech Ave, Wuhan 430205, Peoples R China
4.Southern Univ Sci & Technol, Coll Engn, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China

Shi, Ying,Zhou, Yilin,Ni, Wenjun,et al. Numerical Modelling of the Optical-Acoustical Characterization of an Anti-Resonant Bragg Hollow Core Fiber[J]. PHOTONICS,2023,10(7).

Shi, Ying,Zhou, Yilin,Ni, Wenjun,Tian, Yongsheng,Lian, Zhenggang,&Shum, Perry Ping.(2023).Numerical Modelling of the Optical-Acoustical Characterization of an Anti-Resonant Bragg Hollow Core Fiber.PHOTONICS,10(7).

Shi, Ying,et al."Numerical Modelling of the Optical-Acoustical Characterization of an Anti-Resonant Bragg Hollow Core Fiber".PHOTONICS 10.7(2023).