An improved version of a photoacoustic beam profiler of pulsed lasers is presented. The new model resorts to high-bandwidth condenser microphones to register higher-order, excited acoustic modes, thus enabling more accurate profiling. In addition, Xe was used as a buffer gas since its high atomic weight further reduces the eigenfrequencies. Furthermore, a new gas-handling system makes up for some deficiencies found in the first model. The system was calibrated using the Airy pattern generated with a pinhole illuminated by a frequency-doubled Nd:YAG laser that excited NO 2 NO 2 traces. Once calibrated, the beam profile of a TEA CO 2 CO 2 laser was obtained, using ethylene as the absorbing species. This profiler returns more accurate pro...
The experimental results will enable a comparison of the numerical code output with experimental dat...
A photoacoustic (PA) spectrometer with high selectivity and sensitivity has been developed for trace...
In this experimental work a laser photoacoustic spectrometer designed and fabricated. System sensiti...
Abstract. Measuring the vibrational-to-translational relaxation time τV-T in gases is one of the fir...
Pulsed laser photoacoustic spectrometer based on CO2 laser excitation is reported. Advantage has bee...
A transversal single-mode TEA CO$_2$ laser, whose cavity design is a diffraction coupled resonator, ...
A high-resolution external laser photoacoustic spectrometer has been developed for trace gas detecti...
Laser photo acoustic spectroscopy is a technique to detect and measure trace gas using infrared lase...
AbstractThe development of an optoelectronic system to analyze the beam intensity profile of CO2 las...
Modulated resonant photoacoustics is a sensitive technique widely used for trace gas sensing. Genera...
This thesis presents an. investigation of the feasibility of exploiting the pulsed indirect photoaco...
Photoacoustic spectroscopy is a widely recognised technique to measure trace gases at parts-per-mill...
Photoacoustic spectroscopy (PAS), as a branch of optical spectroscopy, is an established, robust, an...
A high-resolution external laser photoacoustic spectrometer has been developed for trace gas detecti...
The technique of pulsed indirect photoacoustic spectroscopy is applied to the examination of free li...
The experimental results will enable a comparison of the numerical code output with experimental dat...
A photoacoustic (PA) spectrometer with high selectivity and sensitivity has been developed for trace...
In this experimental work a laser photoacoustic spectrometer designed and fabricated. System sensiti...
Abstract. Measuring the vibrational-to-translational relaxation time τV-T in gases is one of the fir...
Pulsed laser photoacoustic spectrometer based on CO2 laser excitation is reported. Advantage has bee...
A transversal single-mode TEA CO$_2$ laser, whose cavity design is a diffraction coupled resonator, ...
A high-resolution external laser photoacoustic spectrometer has been developed for trace gas detecti...
Laser photo acoustic spectroscopy is a technique to detect and measure trace gas using infrared lase...
AbstractThe development of an optoelectronic system to analyze the beam intensity profile of CO2 las...
Modulated resonant photoacoustics is a sensitive technique widely used for trace gas sensing. Genera...
This thesis presents an. investigation of the feasibility of exploiting the pulsed indirect photoaco...
Photoacoustic spectroscopy is a widely recognised technique to measure trace gases at parts-per-mill...
Photoacoustic spectroscopy (PAS), as a branch of optical spectroscopy, is an established, robust, an...
A high-resolution external laser photoacoustic spectrometer has been developed for trace gas detecti...
The technique of pulsed indirect photoacoustic spectroscopy is applied to the examination of free li...
The experimental results will enable a comparison of the numerical code output with experimental dat...
A photoacoustic (PA) spectrometer with high selectivity and sensitivity has been developed for trace...
In this experimental work a laser photoacoustic spectrometer designed and fabricated. System sensiti...