Related Experiment Video
Updated: Jun 24, 2026
11:08
Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
Wavelet-transform analysis for group delay extraction of white light spectral interferograms.
Yuqiang Deng1, Weijian Yang, Chun Zhou
1Division of Metrology in Optics and Laser, National Institute of Metrology, Beijing 100013, China. yqdeng@nim.ac.cn
Optics Express
|April 15, 2009
Summary
Wavelet-transform analysis offers a simple method for extracting group delay from white light interferograms. This technique is robust against interferometer path length imbalances, making it ideal for characterizing chirped mirrors.
Area of Science:
- Optical metrology
- Wavelet analysis
- Spectroscopy
Background:
- Accurate characterization of optical components like chirped mirrors is crucial for ultrafast laser systems.
- Traditional methods for group delay extraction can be sensitive to experimental conditions such as path length balancing.
Purpose of the Study:
- To introduce and validate a simple and robust technique for group delay extraction from white light spectral interferograms.
- To demonstrate the applicability of wavelet-transform analysis for precise chirped mirror characterization.
Main Methods:
- Utilizing wavelet-transform analysis for processing white light spectral interferograms.
- Extracting group delay and group delay dispersion from interferometric data.
Main Results:
- The proposed wavelet-transform method successfully extracts group delay from white light spectral interferograms.
- The extracted group delay dispersion was found to be insensitive to the path length balancing of the interferometer.
Conclusions:
- Wavelet-transform analysis provides a flexible and robust approach for group delay extraction.
- This technique simplifies and enhances the characterization of chirped mirrors, improving their usability in optical systems.
