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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
Published on: February 28, 2016
Phase locking of two coupled lasers with many longitudinal modes
Moti Fridman1, Micha Nixon, Eitan Ronen
1Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 76100, Israel. fefridma@wisemail.weizmann.ac.il
Optics Letters
|February 18, 2010
Summary
Coupled fiber lasers exhibit complex longitudinal mode behavior influenced by coupling strength and detuning. As coupling increases, initially common modes phase lock, then uncommon modes reappear, leading to a single-cavity effect.
Area of Science:
- Physics
- Optics
- Laser Technology
Background:
- Coupled lasers are essential in various optical applications.
- Understanding longitudinal mode behavior is crucial for laser design and performance.
Purpose of the Study:
- To investigate the influence of coupling strength and detuning on the longitudinal modes of two coupled fiber lasers.
- To elucidate the mechanisms governing phase locking and mode competition in coupled laser systems.
Main Methods:
- Detailed experimental investigations of coupled fiber laser systems.
- Theoretical modeling and analysis of longitudinal mode dynamics.
- Varying coupling strength and inter-laser detuning parameters.
Main Results:
- Longitudinal mode behavior is critically dependent on coupling strength and detuning.
- At low to moderate coupling, only common modes phase lock; uncommon modes disappear.
- At higher coupling strengths, uncommon modes reappear and phase lock, mimicking a single long cavity.
Conclusions:
- The observed phase locking is a result of competition between phase-locked and non-phase-locked longitudinal modes.
- Coupling strength significantly alters the mode structure and coherence of coupled fiber lasers.
- Results provide insights into controlling mode behavior in multi-cavity laser systems.
