CJYDF-20/400-PM from Changjin Photonics is an optical fiber specially designed for high-power fiber lasers and amplifiers. It features excellent beam quality, power stability and environmental adaptability, and is suitable for various special application scenarios such as industrial processing. The following is a detailed introduction: 

Design Features

Low NA Design: The low NA design helps improve beam quality and energy conversion efficiency.
High-Precision Dimension Control: Precise control of boron rod spacing, boron rod size, core size, etc., ensures that the fiber has a high polarization extinction ratio while better adapting to the laser system.

Material Optimization

Optimized Core Composition: The doping composition of the fiber core is optimized to improve indicators such as fiber gain efficiency, while enhancing the gain attenuation resistance of the fiber and extending its service life.
Optimized Coating Material: The fiber coating material is optimized to ensure that the fiber works stably in harsh environments.

Performance Advantages

High Power Output: Based on the above design features and material optimization, the fiber has high mode instability threshold and nonlinear threshold, enabling higher power output.
High Resistance to Environmental Interference: Insensitive to temperature changes, mechanical vibrations and bending, it performs excellently in harsh environments such as aerospace and industry.
High Polarization State Consistency: It eliminates polarization randomness, improves beam combining efficiency, beam quality and system stability. It is an irreplaceable choice in polarization-sensitive scenarios such as high-power lasers and coherent beam combining.