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Phase locking and in-phase supermode selection in monolithic multicore fiber lasers.
1College of Optical Sciences, Unviersity of Arizona, Tuscon, Arizona 85721, USA. lli@email.arizona.edu
Optics Letters
|August 12, 2006
Summary
We developed a compact, all-fiber laser for phase locking multiple emitters. This monolithic device selectively excites the in-phase supermode, simplifying multiemitter laser operation.
Area of Science:
- Optics and Photonics
- Fiber Lasers
- Laser Engineering
Background:
- Multiemitter fiber lasers offer high power but often require complex free-space optics for phase locking.
- Achieving stable, in-phase operation in such systems is crucial for various applications.
Purpose of the Study:
- To demonstrate a compact, all-fiber approach for phase locking and supermode selection in a multicore fiber laser.
- To eliminate the need for conventional free-space and bulk optics in multiemitter laser systems.
Main Methods:
- Utilized a monolithic 19-core fiber laser device.
- Spliced passive coreless fibers of specific lengths to the active fiber ends.
- Employed an all-fiber technique for phase locking and in-phase supermode selection.
Main Results:
- Successfully achieved selective excitation of the fundamental in-phase supermode.
- Demonstrated phase-locked operation of the multiemitter laser using a completely monolithic fiber setup.
- Confirmed the effectiveness of the coreless fiber splicing technique for mode control.
Conclusions:
- The developed all-fiber approach provides a compact and robust solution for phase-locked multiemitter fiber lasers.
- This monolithic design simplifies laser system construction and enhances stability.
- The method enables efficient excitation of the desired in-phase supermode, paving the way for practical high-power fiber laser sources.