Integrated ammonia sensor using a telecom photonic integrated circuit and a hollow core fiber

A Hänsel, AI Adamu, C Markos, A Feilberg, O Bang… - Photonics, 2020 - mdpi.com
We present a fully integrated optical ammonia sensor, based on a photonic integrated circuit
(PIC) with a tunable laser source and a hollow-core fiber (HCF) as gas interaction cell. The …

Optical ammonia sensors based on Hollow core fiber and photoacoustic spectroscopy

AI Adamu, MK Dasa, K Kwarkye, G Woyessa… - Laser …, 2019 - opg.optica.org
Gas sensors are of great interest in detection and monitoring of air pollution. We report on
the sensing of ammonia gas using two optical modalities. We demonstrate an all-fiber based …