A DFB-LD Internal Temperature Fluctuation Analysis in a TDLAS System for Gas Detection

Yulei Xie; Jun Chang; Xiaohan Chen; Jiachen Sun; Qinduan Zhang; Fupeng Wang; Zhiwen Zhang; Yiwen Feng

doi:10.1109/JPHOT.2019.2916800

IEEE Photonics Journal (Jan 2019)

A DFB-LD Internal Temperature Fluctuation Analysis in a TDLAS System for Gas Detection

Yulei Xie,
Jun Chang,
Xiaohan Chen,
Jiachen Sun,
Qinduan Zhang,
Fupeng Wang,
Zhiwen Zhang,
Yiwen Feng

Affiliations

Yulei Xie: School of Information Science and Engineering, Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Jinan, China
Jun Chang: ORCiD; School of Information Science and Engineering, Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Jinan, China
Xiaohan Chen: School of Information Science and Engineering, Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Jinan, China
Jiachen Sun: ORCiD; School of Information Science and Engineering, Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Jinan, China
Qinduan Zhang: ORCiD; School of Information Science and Engineering, Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Jinan, China
Fupeng Wang: ORCiD; School of Information Science and Engineering, Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Jinan, China
Zhiwen Zhang: School of Information Science and Engineering, Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Jinan, China
Yiwen Feng: School of Information Science and Engineering, Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Jinan, China

DOI: https://doi.org/10.1109/JPHOT.2019.2916800
Journal volume & issue: Vol. 11, no. 3
pp. 1 – 8

Abstract

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The temperature fluctuations inside commercially distributed feedback laser diode were experimentally measured and analyzed in detail in this study. In tunable diode laser absorption spectroscopy based gas sensing systems, the temperature of the laser source is usually fixed and a current signal is used to drive the laser for wavelength scanning or modulation. Even if the laser is controlled by a robust temperature controller, the internal temperature still fluctuates due to the delayed response of the temperature controller when rapidly changing the drive current. These temperature fluctuations result in distortions in the measured absorption signals which can be effectively suppressed by limiting the drive current modulation to the resonance frequency of the temperature control proportional-integral-derivative loop. This study demonstrates a reduction in the temperature dependent absorption distortions and improves the detection uncertainty using this technique.

Published in IEEE Photonics Journal

ISSN: 1943-0655 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics; Science: Physics: Optics. Light
Website: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4563994

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