Seismic Exploration with VCSEL Based on Doppler Self-Mixing Effect

Author

Lei, Shao ; Bo, Zhu ; Liu Fenglian ; Liu Hongli

Author_Institution

Tianjin Univ. of Technol., Tianjin, China

fYear

2010

fDate

19-21 June 2010

Firstpage

1

Lastpage

4

Abstract

In order to improve the resolution of seismic exploration, a self-mixing semiconductor laser measurement system based on VCSEL is proposed in this paper. Both the most principle frequency method based on short time Fourier transform and the modulus maximum method based on wavelet transform are employed to identity Doppler signal and restrain noise effectively. By technique of triangle-wave current modulation, the direction of motion can be discerned accurately. In comparison with experimental data of normal vibration platform, the relative error of measurement is less than 1%.

Keywords

Fourier transforms; geophysical techniques; seismology; wavelet transforms; Doppler frequency shift; Doppler self-mixing effect; Doppler signal; Fourier transform; VCSEL; modulus maximum method; principle frequency method; seismic exploration; self-mixing semiconductor laser measurement system; triangle-wave current modulation; wavelet transform; Fourier transforms; Frequency; Laser noise; Seismic measurements; Semiconductor device noise; Semiconductor lasers; Signal resolution; Vertical cavity surface emitting lasers; Vibration measurement; Wavelet transforms;

fLanguage

English

Publisher

ieee

Conference_Titel

Photonics and Optoelectronic (SOPO), 2010 Symposium on

Conference_Location

Chengdu

Print_ISBN

978-1-4244-4963-7

Electronic_ISBN

978-1-4244-4964-4

Type

conf

DOI

10.1109/SOPO.2010.5504381

Filename

5504381