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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 17:53 |
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Conference: Bucharest University Faculty of Physics 2017 Meeting
Section: Optics, Spectroscopy, Plasma and Lasers
Title:
Setup for quantum cascade lasers characterization using the labview programming environment
Authors:
Petrisor BLEOTU (1), Laura MIHAI (2), Andrei STANCALIE (2), Dan SPOREA (2)
Affiliation:
1) Faculty of Applied Science, University “Politehnica” of Bucharest, 060042, Bucharest, Romania;
2)National Institute for Laser, Plasma and Radiation Physics, Center for Advanced Laser Technologies,
Atomistilor St 409, Magurele, RO-077125, Romania;
E-mail
petrisor.bleotu@gmail.com
Keywords:
Quantum Cascade Lasers (QCL) , LabView programming, QCL characterization
Abstract:
Quantum Cascade Laser diodes (QCL) have experienced a rapid growth in the mid and far infrared range targeting spectroscopy applications, considering their performances: tunabilility, and sensitivity (ppb). They are considered for use in medicine, homeland security, remote sensing of gases and pollutants, etc. [1, 2]. Such demanding applications require a better evaluation of these devices characteristics in order to tune them to specific needs. Thereby, we report here an automatic setup for complete QCLs characterization. The setup control was achieved using LabVIEW program, bringing to the forefront a much faster and more accurate data acquisition than those already reported through the previously reported manual characterization [3, 4]. The advantages of using with the LabVIEW programming environment for the automation control of the setup reduced the acquisition time and provide a 5-digit accuracy for the experimental data, by handling simultaneously several instruments: QCL’s driver/ temperature controller, a power meter, a wavelength meter, a spectrum analyser and a laser beam analyser. In this way, data are collected under different QCL operating conditions: temperature, driving current, and temporal stability. Laser beam analysis includes the beam profile evaluation to extract the main characteristics of the beam, such as: beam waist, beam divergence, M^2 factor and the right distance where the beam is monomode. In addition, on-line monitoring of the 2D and 3D profiles are estimated by running a single measurement. The proposed setup and the associated software constitute a reliable, high speed and accurate testing facility for QCLs under different operating conditions, as required by specific applications.
References:
[1]. S. Bartalini, M. S. Vitiello, and P. De Natale, “Quantum cascade lasers: a versatile source for precise measurements in the mid/far-infrared range,” Meas. Sci. Technol. 25(1), 012001, 2014.
[2]. N.Lang,J. Röpcke, S. Wege, A. Steinach, „In situ diagnostic of etch plasmas for process control using quantum cascade laser absorption spectroscopy”. Eur. Phys. J. Appl. Phys. 49 (13110): doi: 10.1051/epjap/2009198, 2009.
[3]. P. Patimisco, L. Mihai, M. Giglioa, A. Sampaoloa, P.P. Calabresea, J. M. Krieselc, D. Sporea, G.Scamarcioa, F. K. Titteld, and V. Spagnolo, “Hollow-core waveguide for single-mode laser beam propagation in the spectral range of 3.7-7.3 μm”, ResearchGate, DOI: 10.1117/12.2209533, 2016.
[4]. P. Patimisco, A. Sampaolo, L. Mihai, M. Giglio, J.Kriesel, D. Sporea 3, G.Scamarcio, F. K. Tittel and V. Spagnolo ,” Low-Loss Coupling of Quantum Cascade Lasers into Hollow-CoreWaveguides with Single-Mode Output in the 3.7–7.6 um Spectral Range”, Sensors, 2016.
Acknowledgement:
L. Mihai and D. Sporea acknowledge the financial support of the Romanian Space Agency under the contract 63/2013, project “Evaluation of Components for Space Applications”. Some of the equipments used in this research were purchased in the frame of the project “Center for Advanced Lasers Technologies (CETAL)”, contract 8PM/2010, financed by UEFISCDI.
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