Amplitude measurement of weak sinusoidal water surface acoustic wave using laser interferometer

• 作 者: 张烈山 张晓琳 唐文彦
• 机 构: School of Electrical Engineering and Automation, Harbin Institute of Technology,
• 出 处: Chinese Optics Letters
• 发表日期: 2015年09期
• 关键词: interferometer sinusoidal deviation briefly modulated calculating verified deter

To determine the amplitude of weak sinusoidal water surface acoustic wave(WSAW), a method based on the spectrum analysis of the phase-modulated interference signal is developed. Calculated from the amplitude spectrum of the detection signal, a characteristic ratio indicates that the phase-modulation depth of a WSAW is suggested by determining the amplitude of a WSAW according to their functional relationship. Experimental investigations for a 4 k Hz WSAW evaluate the measurement’s precision with an amplitude measurement standard deviation of 0.12 nm. The measurement accuracy also is demonstrated by the experimental investigations.The theory of this method is briefly described, and the experimental setup is presented.

To determine the amplitude of weak sinusoidal water surface acoustic wave (WSAW), a method based on the spectrum analysis of the phase-modulated interference signal is developed. Calculated from the amplitude spectrum of the detection signal, a characteristic ratio that that phase- modulation of a WSAW is suggested by determining the amplitude of a WSAW is suggested by determining the amplitude of a WSAW according to their functional relationship. Experimental measurement for a 4 k Hz WSAW evaluate the measurement’s precision with an amplitude measurement standard deviation of 0.12 nm. experimental investigations. The theory of this method is briefly described, and the experimental setup is presented.