研究目的
Investigating the development and applications of fiber lasers, focusing on the improvement of output power and beam quality through the use of double-clad fiber technology.
研究成果
Fiber laser technology has developed rapidly in recent years, becoming a new hot spot in the laser field. The use of double-clad fiber and laser diode array pump technology has considerably improved the output power of the fiber laser. The output power of the single-mode fiber laser is up to 2000 W, and the output of multimode fiber lasers can reach up to 50 kW. An output of 105 kW can be obtained by utilizing coherent combination techniques.
研究不足
The early single-clad, single-mode fiber laser is hard to achieve high power output due to the limitation of the cross-section or the diameter of the fiber core. The output power is limited by the safety value of 1w/μm2, which will not cause fiber damage.
1：Experimental Design and Method Selection:
The paper discusses the working principle of fiber lasers, modes of the fibers, and conditions for single-mode operation. It also describes the double-clad technology and stimulated scattering fiber lasers.
2：Sample Selection and Data Sources:
The study focuses on rare earth ion-doped fibers, including Er3+, Tm3+, and Yb3+ doped fibers, and their energy levels and spectra in silicon- and fluorine-based fibers.
3：List of Experimental Equipment and Materials:
The paper mentions the use of laser diodes (LD) or its array, Ti:sapphire lasers, and other fiber lasers as pumping sources. It also discusses the structure of optical fiber lasers, including the basic structure and the double-clad structure.
4：Experimental Procedures and Operational Workflow:
The methodology includes the analysis of energy levels and spectra of several rare earth ions, the mode property and conditions for single-mode operation, and the basic structure of optical fiber lasers.
5：Data Analysis Methods:
The paper provides equations and theoretical models to analyze the gain coefficient, mode property, and conditions for single-mode operation in optical fiber media.
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