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

fYear

2009

fDate

14-16 Aug. 2009

Firstpage

1

Lastpage

4

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Photonics and Optoelectronics, 2009. SOPO 2009. Symposium on

Conference_Location

Wuhan

Print_ISBN

978-1-4244-4412-0

Type

conf

DOI

10.1109/SOPO.2009.5230313

Filename

5230313