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Polarization characterization of a Mach-Zehnder interferometer
Applied Optics
|November 25, 2010
Summary
This study characterizes Mach-Zehnder interferometer polarization. Controlling light power and polarization states in each arm enables stable output, crucial for polarization-independent optical component characterization.
Area of Science:
- Optics and Photonics
- Interferometry
- Polarization Optics
Background:
- Mach-Zehnder interferometers are fundamental optical devices.
- Characterizing polarization states (SOP) and degree of polarization (DOP) is essential for optical system performance.
- Understanding light source coherence effects on polarization is critical.
Purpose of the Study:
- To present a comprehensive polarization characterization of a Mach-Zehnder interferometer.
- To investigate the influence of light power and SOP in each arm on output polarization.
- To explore methods for simultaneous control of SOP and DOP.
Main Methods:
- Utilizing state of polarization (SOP) and power measurements at the interferometer output.
- Applying Stokes formalism and Poincaré sphere representation for SOP and DOP analysis.
- Systematically varying light power and SOP within the interferometer arms.
Main Results:
- Output SOP and DOP are significantly dependent on light power distribution and input SOPs.
- Light source coherence critically affects SOP and DOP stability and output power.
- Simultaneous control over SOP and DOP is achievable through careful configuration.
Conclusions:
- The study demonstrates a method for detailed polarization characterization of Mach-Zehnder interferometers.
- Achieved control over output polarization allows for the creation of specific light sources.
- A quasi-monochromatic, non-polarized light source was realized, beneficial for polarization-independent optical component characterization.
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