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Title:Absorpcijska spektroskopija z nastavljivo lasersko diodo in integriranim lock-in ojačevalnikom : magistrsko delo
Authors:ID Papotnik, Blaž (Author)
ID Njegovec, Matej (Mentor) More about this mentor... New window
ID Budinski, Vedran (Comentor)
Files:.pdf MAG_Papotnik_Blaz_2025.pdf (3,11 MB)
MD5: F9F926BD96A076013B337656D4B1F346
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FERI - Faculty of Electrical Engineering and Computer Science
Abstract:Magistrsko delo obravnava metodo absorpcijske spektroskopije z nastavljivo lasersko diodo. Predstavljeno je teoretično ozadje metode in način kako tokovno modulirati DFB laser, ki omogoča natančno spreminjanje valovne dolžine izsevane svetlobe. Nadalje je predstavljeno zasnovano elektronsko vezje na osnovi analognega lock-in ojačevalnika in programska oprema za zajem in obdelavo signalov. Opisana je metoda demodulacije višjih harmonikov, s katero se poveča občutljivost meritev in zmanjša vpliv šumov. Prav tako so prikazane eksperimentalne meritve, ki potrjujejo prisotnost višjih harmonikov v merjenem signalu. Meritve so bile izvedene za amonijak, ki je bil pridobljen iz amonijevega hidroksida.
Keywords:absorpcijska spektroskopija, 2f-TDLAS, višji harmoniki, lock-in ojačevalnik, DFB laser
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[B. Papotnik]
Year of publishing:2025
Number of pages:1 spletni vir (1 datoteka PDF (XI, 57 str.))
PID:20.500.12556/DKUM-95591 New window
UDC:(621.38:543.421043.2)
COBISS.SI-ID:261336323 New window
Publication date in DKUM:23.10.2025
Views:137
Downloads:27
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FERI
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:29.09.2025

Secondary language

Language:English
Title:Absorption spectroscopy with a tunable laser diode and integrated lock-in amplifier
Abstract:The master's thesis addresses the method of absorption spectroscopy using a tunable diode laser. It presents the theoretical background of the method and the way in which the DFB laser is current modulated, allowing precise control of the emitted light wavelength. Furthermore, the designed electronic circuit and software for signal acquisition and processing are presented. The method of higher harmonic demodulation is described, which increases measurement sensitivity and reduces the influence of noise. Experimental measurements are also shown, confirming the presence of higher harmonics in the measured signal. The measurements were performed on ammonia, which was obtained from ammonium hydroxide.
Keywords:absorption spectroscopy, 2f-TDLAS, higher harmonics, lock-in amplifier, DFB laser


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