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Coherence length modulation of a multimode laser diode in a dual Michelson interferometer configuration
Applied Optics
|August 20, 2010
Summary
This study explores using a multimode laser diode in a dual Michelson interferometer with coherence length modulation. The technique offers a reproducible method for shifting interference regions, useful for optical sensing applications.
Area of Science:
- Optics and Photonics
- Interferometry
- Laser Technology
Background:
- Michelson interferometers are fundamental optical tools.
- Controlling interference patterns is crucial for sensor applications.
- Multimode laser diodes offer unique properties for interferometric setups.
Purpose of the Study:
- To investigate the theoretical and experimental application of a multimode laser diode in a dual Michelson interferometer.
- To explore the technique of coherence length modulation for manipulating interference regions.
- To assess the potential of this method for optical sensing.
Main Methods:
- Utilizing a dual Michelson interferometer configuration.
- Employing a multimode (compact-disk type) laser diode as the light source.
- Applying the technique of coherence length modulation.
Main Results:
- Demonstrated a theoretical and experimental framework for using multimode laser diodes in interferometry.
- Achieved reproducible shifting of interference regions.
- Validated the feasibility of coherence length modulation for controlling interference patterns.
Conclusions:
- The investigated technique provides a novel approach for optical sensing.
- Coherence length modulation with multimode laser diodes is a viable method for flow and distance measurements.
- This research opens avenues for advanced optical sensor development.
