@inproceedings{b71a8281f6ef47a5980a1ad3c5640dd3,
title = "Polarization-mode-phase-difference photothermal gas sensing with an optical microfiber coupler",
abstract = "We report an evanescent-wave photothermal interferometry gas sensor by measuring the phase difference between two polarization modes in a single-mode bi-conical tapered microfiber coupler. With a 2-cm-long, wavelength-scale-diameter microfiber coupler, the noise-reduction capability to external perturbations is significantly improved, resulting in a detection limit of 28 ppb for acetylene with a 1-s lock-in time constant.",
keywords = "Gas detection, Laser spectroscopy, Microfiber, Photothermal spectroscopy, Polarization mode interferometer",
author = "Pengcheng Zhao and Ho, \{Hoi Lut\} and Shuangxiang Zhao and Wei Jin",
note = "Publisher Copyright: {\textcopyright} 2025 SPIE.; 29th International Conference on Optical Fiber Sensors ; Conference date: 25-05-2025 Through 30-05-2025",
year = "2025",
month = may,
doi = "10.1117/12.3062015",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
pages = "1--4",
editor = "Santos, \{Jose Luis\} and Sainz, \{Manuel Lopez-Amo\} and Tong Sun",
booktitle = "29th International Conference on Optical Fiber Sensors",
address = "United States",
}