Sökning: "Jürgen Röpcke"

Hittade 2 avhandlingar innehållade orden Jürgen Röpcke.

1. 1. Optical Frequency Comb Fourier Transform Spectroscopy

   Författare :Alexandra C. Johansson; Aleksandra Foltynowicz; Ove Axner; Jürgen Röpcke; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Optical frequency comb spectroscopy; Fourier transform; molecular absorption dispersion; fysik; Physics;

   Sammanfattning : Fourier transform spectroscopy (FTS) based on optical frequency combs is an excellent spectroscopic tool as it provides broadband molecular spectra with high spectral resolution and an absolutely calibrated frequency scale. Moreover, the equidistant comb mode structure enables efficient coupling of the comb to enhancement cavities, yielding high detection sensitivity. LÄS MER

3. 2. Development of diode laser-based absorption and dispersion spectroscopic techniques for sensitive and selective detection of gaseous species and temperature

   Författare :Lemthong Lathdavong; Ove Axner; Jürgen Röpcke; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Absorption Spectrometry AS ; Wavelengh Modulation Absorption Spectrometry WMAS ; Faraday Modulation Spectrometry FAMOS ; Tunable Diode Laser Absorption Spectrometry TDLAS ; Optics; Optik; fysik; Physics;

   Sammanfattning : The main aim of this thesis has been to contribute to the ongoing work with development of new diode-laser-based spectroscopic techniques and metho­do­lo­gies for sensitive detection of molecules in gas phase. The techniques under scrutiny are tunable diode laser absorption spectrometry (TDLAS) and Faraday modulation spectrometry (FAMOS). LÄS MER