ABSTRACT We report the modeling and designing aspects of different types of photo-acoustic (PA) cell based on the excitation of longitudinal, radial and azimuthal mode using CW and pulse lasers. The results are obtained by employing fluid dynamics equations along with Bessel’s function. The obtained results based on stimulation of longitudinal, radial and azimuthally resonance modes of the Photo acoustic signals in the suitable cavity. This is utilized to design highly efficient low volume PA detector for the spectroscopic studies of different types of atmospheric pollutants. We have also studied the dependence of the excited photo acoustic signals on various parameters such as cell radius, laser power, absorption coefficient, quality factor ‘Q’ along with the first longitudinal, radial, azimuthal mode and the pressure. The simulated results show the linearity of the PA signal with different concentration of the gas sample.
Cite this paper
nullF. Yehya and A. Chaudhary, "Designing and Modeling of Efficient Resonant Photo Acoustic Sensors for Spectroscopic Applications," Journal of Modern Physics, Vol. 2 No. 4, 2011, pp. 200-209. doi: 10.4236/jmp.2011.24028.
 A. G. Bell, “On the Production and Reproduction of Sound by Light,” American Journal of Science, Vol. 5, No. 118, 1880, pp. 305-324.
 J. Tyndall, “Action of an Intermittent Beam of Radiant Heat upon Gaseous Matter,” Proceedings of the Royal Society, Vol. 31, No. 307, 1881. pp. 307-317.
 W. C. Rontgen, “U¨berTo¨ne, Welchedurchintermittierende Bestrahlungeines Gases Entstehen,” Annual Review of Physical Chemistry, Vol. 1, No. 155, 1881.
 W. M. Sigrist, “In Air Monitoring by Spectroscopic Techniques,” John Wiley and Sons, New York, 1994.
 I. G. Calasso, V. Funtov and M. W. Sigrist, “Analysis of Isotopic CO2 Mixtures by Laser Photo Acoustic Spectroscopy,” Applied Optics, Vol. 36, 1997, pp. 3212-3216.
 A. Th?ny and M. W. Sigrist, “New Developments in CO2-Laser Photo acoustic Monitoring of Trace Gases,” Infrared Physics & Technology, Vol. 36, No. 2, 1995, pp. 585-615.
 A. Petzold and R. Niessner, “Photo Acoustic Sensor for Carbon Aerosols,” Applied Physics Letters, Vol. 66, No. 10, 1995, pp. 1285-1297. doi:10.1063/1.113271
 Z. Bozóki, A. Mohácsi, V. Szabó, Z. Bor, M. Erdélyi, W. Chen and F. K. Tittel, “Near-Infrared Diode Laser Based Spectroscopic Detection of Ammonia: A Comparative Study of Photo acoustic and Direct Optical Absorption Methods,” Application Spectrosc, Vol. 56, No. 6, 2002, pp. 715-719.
 A. Boschetti, D. Bassi, E. Iacob, S. Ionnatta, L. Ricci and M. Scotoni, “Resonant Photo Acoustic Simultaneous Detection of Methane and Ethylene by Means of a 1.63-μm Diode Laser,” Applied Physics B, Vol. 74, No. 3, 2002, pp. 273-278. doi:10.1007/s003400200790
 S. Thomas, “Photo Acoustic Spectroscopy for Process Analysis” Analytical and Bioanalytical Chemistry, Vol. 384, No. 5, 2006, pp. 1071-1086.
 S. Tapio, M. Albert, T. Juha, S. Jaakko and H. Rolf, “Resonant Photo Acoustic Cell for Pulsed Laser Analysis of Gases at High Temperature” Review scientific Instruments, Vol. 80, No. 12, 2009, p. 123103.
 A. Miklos, P. Hess, “Application of Acoustic Resonators in Photo Acoustic Trace Gas Analysis and Metrology” Review scientific Instruments, Vol. 72, No. 4, 2001, pp. 1937-1955. doi:10.1063/1.1353198
 A. Rosenzwaig, “Photo Acoustic and Photo Acoustic Spectroscopy,” John Wiley and Sons, New York, 1980.
 C. Brand, A. Winkler, P. Hess, A. Miklos, Z. Bozoki and J. Sneider, “Pulsed-laser Excitation of Acoustic Modes in Open High-Q Photo Acoustic Resonators for Trace Gas Monitoring: Results for C2H4,” Applied Optics, Vol. 34, No. 18, 1995, pp. 3257-3266. doi:10.1364/AO.34.003257
 P. M. Morse and K. U. Ingard, “Theoretical Acoustics,” Princeton University Press, Princeton, New Jersey, 1986.
 A. Karbach and P. Hess, “Photo Acoustic Signal in a Cylindrical Resonator: Theory and Laser Experiments for CH4 and C2H4,” Journal of chemistry Physics, Vol. 84, 1986, p. 2945. doi:10.1063/1.450809
 A. Miklos, P. Hess, A. Mohacsi, J. Sneider, S. Kamm and S. Schafer, “Photo Acoustic and Photo Theraml Phenomena,” 10th International Conference, edited by I. F. Scudier and M. Bertolotti, AIP, Woodbury, New Jersey, 1999.