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Optical path-length difference effects in photomixing with multimode gas laser radiation.
1Research Laboratories, Brown EngineeringCompany, Inc., Huntsville, Alabama, USA.
Applied Optics
|January 9, 2010
Summary
The heterodyne signal amplitude in photomixing experiments using multimode gas lasers depends on optical path length differences. This study models this dependence, impacting optical heterodyne receiver design.
Area of Science:
- Optics and Photonics
- Laser Physics
- Signal Processing
Background:
- Photomixing experiments utilize multimode gas lasers.
- Heterodyne signal amplitude is known to vary with optical path length difference.
Purpose of the Study:
- To model the dependence of heterodyne signal amplitude on optical path length difference.
- To investigate this dependence for varying numbers of axial modes in multimode gas lasers.
Main Methods:
- A phenomenological model of multimode gas laser radiation was employed.
- Calculations were performed to determine heterodyne signal amplitude variations.
Main Results:
- The study quantifies the relationship between heterodyne signal amplitude and optical path length difference.
- The number of oscillating axial modes influences this dependence.
Conclusions:
- The findings provide a theoretical basis for understanding heterodyne signal behavior in multimode laser photomixing.
- Results are crucial for optimizing the design of optical heterodyne receivers.
