Mid-Infrared Gas Sensor Based on Mutually Injection Locked Quantum Cascade Lasers
| Autor: | Adonis Bogris, Dimitris Syvridis, Andreas Herdt, W. Elsaber |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Distributed feedback laser
Tunable diode laser absorption spectroscopy Materials science Spectrometer business.industry 02 engineering and technology Laser pumping Injection seeder Laser 01 natural sciences Atomic and Molecular Physics and Optics law.invention 010309 optics 020210 optoelectronics & photonics Optics Quantum dot laser law 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering business Tunable laser |
| Zdroj: | IEEE Journal of Selected Topics in Quantum Electronics. 23:8-14 |
| ISSN: | 1558-4542 1077-260X |
| DOI: | 10.1109/jstqe.2016.2603341 |
| Popis: | We present experimental investigations of a novel mid-infrared gas sensor relying on a laser system consisting of two quantum cascade sources mutually coupled with each other. The free-space path between the two lasers contains the sensing cell which is filled with the gas of interest. This laser system proves to be a very interesting dynamical system which can offer enhanced detectivity when compared to a conventional direct absorption spectrometer utilizing a laser, the gas cell, and a detector. We present comprehensive investigations of the operation regimes under which the laser system behaves as an efficient sensor and demonstrate its dependence on critical parameters such as the coupling strength between the two lasers and their bias currents. The experimental study is supported by numerical simulations, which provide a theoretical understanding of the underlying mechanisms. A six fold improvement of the sensitivity in a N2O absorption spectroscopy experiment is demonstrated in comparison to a conventional direct absorption spectrometer. This sensitivity improvement is exhibited for a wide range of N2O concentrations. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|