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Proceedings Paper

High-strength high-efficiency cladding light strippers with CO2 laser ablation
Author(s): Gongwen Zhu; Wenxin Zheng
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Paper Abstract

All-glass microstructured high-power cladding light strippers (CLSs) capable of handling hundreds of watts of cladding power or more are highly desired in cladding-pumped high power fiber laser systems. In this paper we demonstrate high strength, high efficiency CLSs with tensile strength more than 50 N, temporary bending diameter less than 6 cm and power stripping efficiency more than 7 dB/cm. These CLSs are fabricated by CO2 laser ablation and their advantages and disadvantages are discussed. The all-glass CLSs possess outstanding heat-dissipating capability and do not require thermal management for up to a few kW of cladding power. Conventionally CLSs are fabricated by utilizing high-index polymer recoating, acid etching or CO2 laser ablation, etc. CLSs with CO2 laser ablation are highly preferred in many application due to their chemical free, contamination-free, noncontact manufacturing process. CLSs with CO2 laser ablated transversal or spiral grooves have the advantages of high efficiency, short processing time. However, the fiber tensile strength is greatly reduced due to glass mini-fractures or cracks that may be introduced and propagate along the grooves. Creating holes on the optical fibers with CO2 laser ablation is an alternative way to fabricate high efficiency CLSs. It provides greatly improved mechanical strength compared to CLSs with transversal or spiral grooves though it needs longer manufacturing time. In this paper we demonstrate high efficiency CLSs with spiral grooves and holes respectively and their optical, thermal performance and mechanical properties are discussed.

Paper Details

Date Published: 21 February 2020
PDF: 6 pages
Proc. SPIE 11261, Components and Packaging for Laser Systems VI, 1126114 (21 February 2020); doi: 10.1117/12.2541573
Show Author Affiliations
Gongwen Zhu, AFL (United States)
Wenxin Zheng, AFL (United States)

Published in SPIE Proceedings Vol. 11261:
Components and Packaging for Laser Systems VI
Alexei L. Glebov; Paul O. Leisher, Editor(s)

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