Integrated Ammonia Sensor Using a Telecom Photonic Integrated Circuit and a Hollow Core Fiber

Photonics

Christos Markos¹  AbubakarIsa Adamu¹  Ole Bang¹  Anders Feilberg²  Andreas Hänsel²  MartijnJ.R. Heck² 

[1] DTU Fotonik, Technical University of Denmark, 2800 Kongens Lyngby, Denmark;Department of Engineering, Aarhus University, 8200 Aarhus, Denmark;

关键词: Photonic integrated circuit;    hollow core fibers;    optical gas sensor;    indium phosphide;   

DOI  :  10.3390/photonics7040093

来源: DOAJ

【 摘 要 】

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 PIC also contains a photodetector that can be used to record the absorption signal with the same device. The sensor targets an ammonia absorption line at 1522.45 nm, which can be reached with indium phosphide-based telecom compatible PICs. A 1.65-m long HCF is connected on both ends to a single-mode fiber (SMF) with a mechanical splice that allows filling and purging of the fiber within a few minutes. We show the detection of a 5% ammonia gas concentration, as a proof of principle of our sensor and we show the potential to even detect much lower concentrations. This work paves the way towards a low-cost, integrated and portable gas sensor with potential applications in environmental gas sensing.

【 授权许可】

Unknown