Title :
Theoretical Study on Influence of Laser Pulse Shape on Characteristics of Acoustics Thermoelastically Induced by CO2 Pulsed Laser in Water
Author :
Chen Qingming ; Cheng Zuhai ; Zhu Haihong
Author_Institution :
Div. of Laser Sci. & Technol., Huazhong Univ. of Sci. & Technol., Wuhan, China
Abstract :
Theoretical study on the influence of the laser pulse (LP) shape on the characteristics of laser acoustic signal (LAS) thermoelastically induced by CO2 laser acoustics (LA) in water was performed. LAS profiles, energy conversion efficiency, and power spectra were investigated theoretically. The results show that with the peak-tail shape CO2 LP, the peak and the tail contribute to LAS exciting together, but the peak has a more obvious affection to LAS, the role of the tail becomes important when its relative intensity to the peak increased or its duration been near the duration of the peak. Narrower LP has higher energy conversion efficiency eta.
Keywords :
carbon compounds; gas lasers; laser beam effects; optical pulse generation; optical pulse shaping; photoacoustic effect; thermoelasticity; water; CO2; CO2 pulsed laser; H2O; energy conversion efficiency; laser acoustic signal; laser pulse shape; thermoelasticity; Acoustic pulses; Energy conversion; Laboratories; Laser theory; Optical pulse shaping; Shape; Sonar detection; Tail; Thermoelasticity; Water;
Conference_Titel :
Photonics and Optoelectronics, 2009. SOPO 2009. Symposium on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-4412-0
DOI :
10.1109/SOPO.2009.5230313
