Investigation into an Optimum Device Structure for Cladding Light Removal in High Power Fiber Lasers
Abstract
In this work, we systematically investigated backward scattering within a cladding light stripper based on a periodically grooved structure of an optical fiber, to figure out the method for its efficient suppression through numerical simulation. On the basis of the investigation results a novel, periodically grooved CLS structure that allows for efficient suppression of backward scattering of cladding light, was thus proposed. More specifically, the relationship between backward scattering of cladding light and the cladding surface roughness of a periodically-grooved CLS was investigated using the ray tracing method. It was shown that the amount of backward scattering of cladding light is dependent on the groove surface roughness and the undesired backward scattering significantly affects the cladding light tripping capability of a CLS. As a result of this theoretical investigation, a periodically-grooved CLS structure with multiple no groove sections of proper length was proposed and its efficacy was then verified through a numerical simulation and an experiment.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 19, 2022
- Accession Number
- AD1194099
Entities
People
- Ju Han Lee
Organizations
- University of Seoul