Abstract

We present a type of few-period helically twisted all-solid photonic bandgap fiber (AS-PBGFs). The helical structure leads to orbital resonance of a cladding rod light, which couples with the core mode. A two-period twist structure exhibits an extremely strong resonant dip of up to 30 dB. A series of samples with twist periods of 3.31–7.92 mm (yielding twist rates of $1.90-0.79\mathrm{rad}\cdot {\mathrm{mm}}^{-1}$) in association with different resonance orders are fabricated and demonstrated. The inherent physical mechanism underlying the resonance is analyzed. Moreover, the responses of the resonance to mechanical torsion, strain, and temperature are investigated. The twisted AS-PBGFs feature high reproducibility, stability, and robustness, and have great potential in tunable in-fiber filters and sensors.

© 2018 Optical Society of America

Measuring mechanical strain and twist using helical photonic crystal fiber

Xiaoming Xi, Gordon K. L. Wong, Thomas Weiss, and Philip St.J. Russell
Opt. Lett. 38(24) 5401-5404 (2013)

High-order orbital angular momentum mode generator based on twisted photonic crystal fiber

Cailing Fu, Shen Liu, Ying Wang, Zhiyong Bai, Jun He, Changrui Liao, Yan Zhang, Feng Zhang, Bin Yu, Shecheng Gao, Zhaohui Li, and Yiping Wang
Opt. Lett. 43(8) 1786-1789 (2018)

Off-axis core transmission characteristics of helically twisted photonic crystal fibers

Takeshi Fujisawa and Kunimasa Saitoh
Opt. Lett. 43(20) 4935-4938 (2018)

Transverse-load, strain, temperature, and torsion sensors based on a helical photonic crystal fiber

Cailing Fu, Yiping Wang, Shen Liu, Zhiyong Bai, Jian Tang, Laipeng Shao, and Xueya Liu
Opt. Lett. 44(8) 1984-1987 (2019)

Fabrication and characterization of an all-solid tellurite–phosphate photonic bandgap fiber

Tonglei Cheng, Yukiko Sakai, Takenobu Suzuki, and Yasutake Ohishi
Opt. Lett. 40(9) 2088-2090 (2015)