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Published on: November 22, 2019
Passive phase locking of 25 fiber lasers
Moti Fridman1, Micha Nixon, Nir Davidson
1Weizmann Institute of Science, Department of Physics of Complex Systems, Rehovot 76100, Israel. moti.fridman@weizmann.ac.il
Optics Letters
|May 4, 2010
Summary
Phase locking of coupled fiber lasers is typically low but can spike briefly. Increasing laser count decreases phase locking, while higher connectivity improves it.
Area of Science:
- Optics and Photonics
- Laser Physics
- Array Coherence
Background:
- Coupled laser arrays are crucial for high-power applications.
- Achieving stable phase locking in large arrays remains a significant challenge.
- Understanding factors influencing phase locking is key for array performance.
Purpose of the Study:
- To investigate the phase locking dynamics in two-dimensional arrays of coupled fiber lasers.
- To quantify the average phase locking level and its dependence on array size and connectivity.
- To identify conditions that lead to transient high phase locking events.
Main Methods:
- Experimental setup involving a two-dimensional array of coupled fiber lasers.
- Measurement of phase locking levels across the array.
- Systematic variation of the number of lasers and array connectivity.
- Analysis of phase locking statistics, including average levels and transient events.
Main Results:
- The average phase locking level for 25 coupled fiber lasers was found to be low, ranging from 20% to 30%.
- Phase locking levels exceeding 90% were observed during rare, brief events.
- Increasing the number of lasers in the array led to a decrease in the average phase locking level.
- Enhanced connectivity within the laser array resulted in an increase in the average phase locking level.
Conclusions:
- Passive phase locking in large 2D fiber laser arrays is inherently limited but exhibits intermittent high-performance states.
- Array size and inter-laser connectivity are critical parameters that govern the overall phase locking efficiency.
- Future research should focus on strategies to enhance connectivity and control transient dynamics for improved laser array performance.
