Frequency fluctuations of stabilized lasers with anisotropic feedbacks

Area of Science:

• Laser Physics
• Quantum Optics
• Optical Engineering

Background:

• Frequency stabilized lasers are crucial for precision measurements.
• Optical feedbacks can perturb laser frequency stability.
• Understanding these perturbations is essential for laser performance optimization.

Purpose of the Study:

• To propose a novel random phase method for quantifying Allan variance perturbations in frequency stabilized lasers subjected to optical feedbacks.
• To analyze the impact of different optical feedback configurations on laser stability.
• To investigate the role of feedback polarization in both one- and two-oscillating-eigenstate stabilized lasers.

Main Methods:

• Development of a random phase method to analyze Allan variance.
• Quantitative description of feedback effects in different laser systems.
• Experimental measurements of Allan variance and frequency variations.
• Isolation and analysis of feedback polarization effects.

Main Results:

• The proposed random phase method accurately determines Allan variance perturbations.
• Quantitative descriptions of feedback roles are provided for various laser systems.
• The importance of feedback polarization is clearly isolated.
• Experimental results align with theoretical predictions for Allan variance and frequency variations.

Conclusions:

• The random phase method is effective for analyzing optical feedback effects on laser frequency stability.
• Theoretical predictions are validated by experimental measurements.
• The study provides a comprehensive understanding of feedback mechanisms impacting stabilized lasers.