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Vibration-resistant Fizeau interferometry using three-cavity multiplexing
Optics Letters
|July 15, 2024
Summary
This study introduces a novel three-cavity multiplexing (TCM) system for vibration-resistant Fizeau interferometry. The TCM effectively measures phase and vibration, overcoming environmental disturbances with a simplified, common-path design.
Area of Science:
- Optics and Photonics
- Metrology
- Interferometry
Background:
- Fizeau interferometry is crucial for high-precision measurements.
- Environmental vibrations often degrade the accuracy of interferometric measurements.
- Existing methods struggle with vibration compensation and complex system setups.
Purpose of the Study:
- To develop a vibration-resistant Fizeau interferometry method.
- To enable simultaneous measurement of phase and vibration information.
- To simplify the testing process and reduce system complexity.
Main Methods:
- A three-cavity multiplexing (TCM) approach was developed.
- A vibration-measurement pass (VMP) was integrated with the Fizeau phase-measurement pass (PMP).
- Vibration information was extracted using temporal differences of mixed fringes and synchronous phase-shifting.
Main Results:
- The TCM system successfully transmitted phase and vibration information.
- Vibration data was demultiplexed and used to correct phase measurements.
- Experimental validation confirmed the feasibility and performance of the TCM.
Conclusions:
- The proposed TCM is the first to address vibration effects and null-fringe demodulation simultaneously.
- The system offers a common path, simple testing, and low complexity.
- This method significantly enhances the robustness and practicality of Fizeau interferometry.
