The measurement of ultraweak liquid surface wave by laser interferometry

Luo, Dijun; Miao, Ran; Liu, Jianke

doi:10.1016/j.ijleo.2011.07.042

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2013

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“…On the basis of laser diffraction, LSW measurements have been made for when the frequency of the LSW is above hundreds of Hz [2]. A laser interference method is often used when the frequency of the LSW is tens of Hz [3], and the small amplitude of the LSW is also measured by means of laser interference [4]. The aim of this paper is to show how we can learn about the weak LSW at low frequencies (say tens of Hz) by means of laser diffraction.…”

Section: Introductionmentioning

confidence: 99%

Laser diffraction from a liquid surface wave at low frequency

Luo

Miao

et al. 2013

Laser Phys.

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A simple experiment on laser diffraction from a liquid surface wave (LSW) is described. The profile of the LSW is approximated as a traveling sinusoidal disturbance. High visibility and stable laser diffraction fringes from the LSW were gathered experimentally, and disappearance of the zero-order diffraction fringe was found in our experiment. In particular, the relations between the intensity distribution of the diffraction fringes and the characteristic features of the LSW are deduced. The theory of light intensity distribution agrees well with the experimental observations. On the basis of the experiment, the wavelength of the LSW can be measured.

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Section: Introductionmentioning

confidence: 99%