Yb/Er co-doped phosphate all-solid single-mode photonic crystal fiber

Area of Science:

• Optics and Photonics
• Materials Science

Background:

• Development of high-power fiber lasers is crucial for various applications.
• Photonic Crystal Fibers (PCFs) offer unique light-guiding properties.
• Rare-earth doped fibers are essential for laser operation.

Purpose of the Study:

• To demonstrate an all-solid Yb(3+)/Er(3+) co-doped single-mode phosphate PCF.
• To achieve Watt-level output power from a single-mode PCF.
• To investigate the single-mode operation characteristics of a novel PCF design.

Main Methods:

• Fabrication of an all-solid Yb(3+)/Er(3+) co-doped phosphate PCF.
• Characterization of the PCF's optical properties and output power.
• Theoretical analysis of single-mode operation based on refractive index contrast.

Main Results:

• Demonstration of an all-solid Yb(3+)/Er(3+) co-doped single-mode phosphate PCF.
• Achieved Watt-level output power with a 20 μm core diameter.
• Theoretically confirmed single-mode operation for a 40 μm core diameter PCF with a lower core refractivity.

Conclusions:

• The developed PCF is a promising gain medium for high-power fiber lasers.
• The novel PCF design enables efficient Watt-level power generation.
• The study provides a theoretical basis for designing single-mode PCFs with specific core diameters.