Title :
Submerged Objects Detecting in the Focusing Regime of Stimulated Brillouin Scattering
Author :
Li-Hua, Wu ; Shuang, Qiao
Author_Institution :
Coll. of Sci., Harbin Eng. Univ., Harbin, China
Abstract :
A method to detecting Submerged Objects by using the effective interaction length of Stimulated Brillouin Scattering (SBS) in the focusing regime is presented in this paper. Relationship of reflected energy dependent on the location of the object in Stimulated Brillouin Scattering cell is introduced, which is used to give the location of Stokes signal disappearing theoretically. We experimentally study Submerged Objects detecting measurements when the detected object is present in three different place, i.e., in front of the focus, just in the place of the focus and the behind of the focus. The delay time of the echo signal to pump signal can give the location of Submerged Object. Using input laser with 532nm nanosecond pulse generated by Q-switched Nd:YAG laser, experimental results show when object is placed in front of focus the measurement error is the lest and the error was less than 4% within 188cm water cell.
Keywords :
Brillouin spectra; aluminium compounds; marine systems; measurement by laser beam; neodymium; yttrium compounds; Nd:YAG; Q-switched laser; SBS; delay time; echo signal; effective interaction length; measurement error; pump signal; size 188 cm; size 532 nm; stimulated Brillouin scattering; stokes signal; submerged object detection measurement; Brillouin scattering; Delay; Focusing; Laser excitation; Pump lasers; Temperature measurement; Stimulated Brillouin Scattering; Submerged Objects Detecting; energy reflection; nonlinear optics;
Conference_Titel :
Industrial Control and Electronics Engineering (ICICEE), 2012 International Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-1-4673-1450-3
DOI :
10.1109/ICICEE.2012.80