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Broadband all-fiber optical phase modulator based on photo-thermal effect in a gas-filled hollow-core fiber
充气空心光纤中基于光热效应的宽带全光纤相位调制器
空気入り中空ファイバにおける光熱効果に基づく広帯域全ファイバ位相変調器
공기 충전 공심 광섬유 중 광열 효과 기반 광대역 전광섬유 위상 변조기
Modulación de fase de fibra óptica completa de banda ancha basada en efectos fototérmicos en fibra hueca inflable
Modulateur de phase Full Fiber à large bande basé sur l'effet photothermique dans la fibre creuse gonflable
Широкополосный полноволоконно - оптический фазовый модулятор на основе фототермального эффекта
Shoulin Jiang 姜寿林 ¹, Feifan Chen 陈非凡 ¹ ², Yan Zhao 赵焱 ¹ ², Shoufei Gao 高寿飞 ³, Yingying Wang 汪滢莹 ³, Hoi Lut Ho 何海律 ¹ ², Wei Jin 靳伟 ¹ ²
¹ Photonics Research Center, the Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, China
中国 深圳 香港理工大学深圳研究院 光子学研究中心
² Department of Electrical Engineering and Photonics Research Institute, the Hong Kong Polytechnic University, Hong Kong 999077, China
中国 香港 香港理工大学 电机工程学系 光子技术研究院
³ Institute of Photonics Technology, Jinan University, Guangzhou 510632, China
中国 广州 暨南大学 光子技术研究院
Opto-Electronic Advances, 4 November 2022
Abstract

We report broadband all-fiber optical phase modulation based on the photo-thermal effect in a gas-filled hollow-core fiber. The phase modulation dynamics are studied by multi-physics simulation.

A phase modulator is fabricated using a 5.6-cm-long anti-resonant hollow-core fiber with pure acetylene filling. It has a half-wave optical power of 289 mW at 100 kHz and an average insertion loss 0.6 dB over a broad wavelength range from 1450 to 1650 nm. The rise and fall time constants are 3.5 and 3.7 μs, respectively, 2–3 orders of magnitude better than the previously reported microfiber-based photo-thermal phase modulators.

The gas-filled hollow-core waveguide configuration is promising for optical phase modulation from ultraviolet to mid-infrared which is challenging to achieve with solid optical fibers.
Opto-Electronic Advances_1
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