Precision measurement of high-frequency displacement based on GHz phase modulation with triangular waveform

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K13996
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Measurement engineering
• Research Institution: Tokyo University of Agriculture and Technology
• Principal Investigator: Tanaka Yosuke 東京農工大学, 工学(系)研究科(研究院), 准教授 (20283343)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 振動変位計測 / 光計測システム

Outline of Final Research Achievements

We proposed and experimentally investigated an optical interferometry using laser light with high-frequency phase modulation in order to achieve single precision measurement of high-speed and minute displacement. A simple experimental setup composed of optical modulators and optical fibers used in optical communications systems was realized. We newly developed a method using high-frequency sinusoidal phase modulation in addition to the initially proposed method that uses triangular phase modulation, and proved that single measurement of the dynamic displacement for 50-MHz vibration is possible.

Free Research Field

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