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Modified white-light Mach-Zehnder interferometer for direct group-delay measurements
Applied Optics
|February 21, 2008
Summary
A novel white-light interferometer design doubles measurement range and minimizes error for precise group-delay measurements of optical components.
Area of Science:
- Optics and Photonics
- Interferometry
- Optical Metrology
Background:
- Accurate group-delay measurements are crucial for characterizing optical components.
- Traditional interferometers face limitations in measuring range and systematic errors.
Purpose of the Study:
- To introduce a modified white-light Mach-Zehnder interferometer for direct group-delay measurements.
- To enhance the measuring range and reduce systematic errors compared to existing methods.
Main Methods:
- A modified white-light Mach-Zehnder interferometer utilizing a single beam splitter.
- Folding interferometer arms to enable a single beam splitter for beam splitting and combining.
- Measurements performed on various optical components within the 555-630 nm spectral region.
Main Results:
- The modified interferometer achieves twice the measuring range of a Michelson interferometer.
- Systematic errors associated with the beam splitter are minimized due to the novel configuration.
- Experimental data acquisition and processing scheme demonstrated for optical components.
Conclusions:
- The proposed interferometer design offers significant advantages for group-delay measurements.
- The method provides a robust and accurate approach for optical component characterization.
- Validation through comparison with theoretical calculations confirms the efficacy of the data processing scheme.
