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Dual-polarization mode-locked Nd:YAG laser
J Thévenin1, M Vallet, M Brunel
1Département d’Optique, Institut de Physique de Rennes, UMR 6251 Université Rennes I—CNRS Campus de Beaulieu, 35042 Rennes Cedex, France. jeremie.thevenin@univ‐rennes1.fr
Optics Letters
|July 25, 2012
Summary
This study demonstrates a solid-state laser emitting two synchronized frequency combs. The polarization evolution of these combs is precisely controlled by intracavity birefringence, matching experimental results with theoretical predictions.
Area of Science:
- Optics and Photonics
- Laser Physics
- Solid-State Lasers
Background:
- Mode-locked lasers are crucial for generating ultrashort pulses.
- Birefringent elements in laser cavities can influence polarization states.
- Frequency combs offer precise spectral lines for various applications.
Purpose of the Study:
- To investigate the synchronous emission of two frequency combs from a solid-state laser.
- To develop an analytical model for predicting polarization evolution.
- To experimentally validate the model using a passively mode-locked Nd:YAG laser.
Main Methods:
- Utilizing a birefringent element within a mode-locked solid-state laser cavity.
- Developing an analytical model to describe pulse train polarization.
- Employing a semiconductor saturable absorber mirror for passive mode-locking.
- Conducting experiments with a Nd:YAG laser system.
Main Results:
- Synchronous emission of two frequency combs corresponding to polarization eigenstates was achieved.
- The analytical model accurately predicted polarization evolution based on intracavity birefringence.
- Experimental results with a Nd:YAG laser validated the theoretical predictions.
- Frequency comb locking was observed at specific frequency differences, such as half the repetition rate.
Conclusions:
- Intracavity birefringence effectively controls the polarization evolution of dual frequency combs.
- The developed analytical model provides a reliable tool for understanding and designing such laser systems.
- The findings enable precise control over dual frequency comb generation and polarization dynamics in solid-state lasers.
