Laser interference fringes fading in and out of view

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SUMMARY

The discussion centers on the fading and reappearing of interference fringes in a Mach-Zehnder interferometer setup, attributed to fluctuations in laser intensity and potential issues with laser coherence. Participants suggest that the coherence time may be around 6 seconds, indicating a need for stable laser operation. The conversation highlights the importance of polarization and mode stability in maintaining consistent interference patterns. Participants recommend measuring laser characteristics and considering the impact of higher-order modes on the interference fringes.

PREREQUISITES
  • Understanding of Mach-Zehnder interferometer principles
  • Knowledge of laser coherence and stability
  • Familiarity with polarization effects in optics
  • Basic concepts of transverse electromagnetic (TEM) modes
NEXT STEPS
  • Research methods for measuring laser coherence, such as using a spectrum analyzer
  • Investigate the effects of polarization on interference patterns in optical setups
  • Learn about the significance of TEM modes in laser operation and interferometry
  • Explore techniques for stabilizing laser intensity and reducing mode hopping
USEFUL FOR

Quantum optics researchers, experimental physicists, and anyone involved in laser-based interference experiments will benefit from this discussion.

  • #31
We ended up writing a program to correct for the blurriness in the interference. We gave up trying to fix it haha.
 
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