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ICOP & ICPET 2017, 23 - : 969-972 Back to browse issues page
Homodyne Vibrometry of the mirror of the thin disk laser using 3-point spatial phase shifting technique
Mohammad Hossein Daemi Mr * 1, Seifollah Rasouli Dr.2
1- MS
2- Associate Professor
Abstract:   (840 Views)

In the measurement of the vibration characteristics of the gain medium in thin disk laser, the homodyne Laser Doppler vibrometry was applied. For recognition of the direction of motion of the vibrating element, we developed the N-point spatial phase shift technique to identify the direction of motion of the linear interference fringes. After experimentally establishing the method, in a special case of 3-point technique, it was applied on the measurement of the vibration characteristics of the gain medium in thin disk laser. The results revealed the random nature of the vibration that can be analyzed through non-stationary signals analysis methods such as short time Fourier transform or wavelet transform. The results of such analysis can be used in the optimizing the laser design.

Keywords: Homodyne laser Doppler vibrometry, N-points spatial phase shifting, non-stationary signals, random vibrations, thin disk laser
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Type of Study: Research | Subject: Special
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Daemi M H, Rasouli S. Homodyne Vibrometry of the mirror of the thin disk laser using 3-point spatial phase shifting technique . ICOP & ICPET. 2017; 23 :969-972
URL: http://opsi.ir/article-1-1237-en.html


Volume 23 - Back to browse issues page
انجمن اپتیک و فوتونیک ایران Optics and Photonics Society of Iran
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