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Microstructured optical fiber for in-phase mode selection in multicore fiber lasers
Wang Chuncan1, Zhang Fan, Liu Chu
1Key Lab of All Optical Network & Advanced Telecommunication Network of EMC, Beijing Jiaotong University, Beijing, 100044, China. xzwangchuncan@126.com
Optics Express
|June 11, 2008
Summary
A novel mode-selection method using microstructured optical fiber (MOF) in multicore fiber (MCF) lasers enhances in-phase mode selection. This MOF-based approach offers higher effectiveness compared to traditional Talbot cavity methods for MCF lasers.
Area of Science:
- Optics and Photonics
- Laser Physics
- Fiber Optics
Background:
- Multicore fiber (MCF) lasers offer high power output but face challenges in mode control.
- Effective mode selection is crucial for stable and high-quality laser output in MCF systems.
- Existing methods like free-space Talbot cavities have limitations in efficiency and complexity.
Purpose of the Study:
- To introduce and evaluate a new mode-selection technique for MCF lasers.
- To demonstrate the effectiveness of a single-mode microstructured optical fiber (MOF) as a mode-selection component.
- To compare the performance of the MOF-based method with conventional techniques.
Main Methods:
- Designing a single-mode microstructured optical fiber (MOF) with specific parameters.
- Integrating the MOF into a multicore fiber (MCF) laser cavity.
- Analyzing the power coupling coefficients between the fundamental mode (FM) of the MOF and different supermodes within the MCF.
- Measuring the power reflection at the cavity end to determine mode dominance.
Main Results:
- The designed MOF parameters enable a significantly higher power coupling coefficient between the FM and the in-phase mode.
- The in-phase mode exhibits the highest power reflection within the MCF laser cavity.
- The in-phase mode effectively dominates the output laser power.
- MCF lasers utilizing the MOF for mode selection show superior effectiveness compared to those using free-space Talbot cavities.
Conclusions:
- Microstructured optical fiber (MOF) serves as a highly effective mode-selection component in multicore fiber (MCF) lasers.
- The MOF-based method provides enhanced in-phase mode selection and power dominance.
- This technique offers a more efficient alternative to traditional mode-selection methods in MCF laser systems.
