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A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
Published on: September 30, 2019
Displacement metrology directly linked to a time standard using an optical-frequency-comb generator.
1National Institute of Advanced Industrial Science and Technology, AIST Tsukuba Central 3, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8563, Japan. y-bitou@aist.go.jp
Optics Letters
|May 19, 2009
Summary
This study presents a laser-frequency metrology system for precise displacement measurement and control. It achieved a 1.3 nm resolution, traceable to a time standard, using a Fabry-Perot cavity and optical frequency comb.
Area of Science:
- Physics
- Metrology
- Optical Engineering
Background:
- Precise displacement measurement is crucial for scientific and industrial applications.
- Existing metrology systems often face limitations in resolution and traceability.
Purpose of the Study:
- To develop a laser-frequency-based displacement metrology system with high resolution and traceability.
- To demonstrate a control system for displacement using the developed metrology.
Main Methods:
- Utilized a Fabry-Perot (FP) cavity for displacement sensing.
- Employed two resonant frequencies of the FP cavity for measurement.
- Integrated an optical-frequency-comb generator to enhance resolution.
- Implemented a phase-locked loop for displacement control.
Main Results:
- Achieved a displacement resolution of approximately 1.3 nm.
- Demonstrated successful displacement control via a phase-locked loop.
- Ensured direct traceability of the control system to a time standard.
Conclusions:
- The developed laser-frequency metrology system offers high-resolution displacement measurement.
- The system provides a robust platform for precise displacement control traceable to a time standard.
