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Related Experiment Video

Updated: Jun 22, 2026

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
14:18

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Published on: February 28, 2016

Polarisation-mode coupling in (100)-cut Nd:YAG.

Aaron McKay, Judith M Dawes, Jong-Dae Park

    Optics Express
    |June 25, 2009
    PubMed
    Summary

    This study examines polarization dynamics in a dual-mode Nd:YAG laser, revealing how thermal effects and pump polarization influence mode coupling. Findings are compared to an anisotropic rate equation model for better understanding laser behavior.

    Area of Science:

    • Physics
    • Laser Technology
    • Materials Science

    Background:

    • Dual-mode lasers exhibit complex polarization dynamics.
    • Nd:YAG lasers are crucial in various scientific and industrial applications.
    • Understanding polarization-mode coupling is essential for laser stability and performance.

    Purpose of the Study:

    • To investigate polarization-mode dynamics and Lamb's mode coupling constant in a dual-mode (100)-cut Nd:YAG laser.
    • To analyze the influence of thermally-induced depolarization and pump polarization on mode coupling.
    • To compare experimental results with an anisotropic rate equation model.

    Main Methods:

    • Experimental investigation of a (100)-cut Nd:YAG laser with feedback.
    • Analysis of polarization-mode dynamics and Lamb's mode coupling constant.

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  • Comparison with a developed anisotropic rate equation model incorporating gain anisotropy.

    • Main Results:

    • The anisotropic (100)-cut Nd:YAG laser shows thermally-induced depolarization.
    • Polarization-mode coupling is dependent on pump polarization, crystal angle, and laser polarization directions.
    • A correlation between depolarization and polarization-mode coupling was observed.

    Conclusions:

    • The study elucidates the interplay between thermal effects, pump polarization, and polarization-mode coupling in Nd:YAG lasers.
    • The anisotropic rate equation model provides a valuable framework for understanding these complex dynamics.
    • This research contributes to the development of more stable and predictable dual-mode laser systems.