Thermal effects in kilowatt fiber lasers

Author

Wang, Yong ; Xu, Chang-Qing ; Po, Hong

Author_Institution

Dept. of Eng. Phys., McMaster Univ., Hamilton, Ont., Canada

Volume

16

Issue

1

fYear

2004

Firstpage

63

Lastpage

65

Abstract

Thermal effects and their influences on kilowatt ytterbium-doped double-clad (YDDC) fiber lasers are studied through numerical modeling. Solutions to suppress the thermal effects in the YDDC fiber lasers under bidirectional end pump and distributed pump are presented and compared for the first time. It is shown that lower operating temperature and more uniform heat dissipation in fibers can be obtained by optimizing the arrangement of pump powers, pump absorption coefficients, and fiber lengths.

Keywords

absorption coefficients; cooling; fibre lasers; laser theory; optical pumping; thermo-optical effects; ytterbium; bidirectional end pump; distributed pump; fiber lengths; kilowatt fiber lasers; kilowatt ytterbium-doped double-clad fiber lasers; lower operating temperature; numerical modeling; pump absorption coefficients; pump powers; thermal effects; uniform heat dissipation; Absorption; Fiber lasers; Gas lasers; Laser excitation; Laser modes; Laser theory; Numerical models; Optical fiber couplers; Power lasers; Pump lasers;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2003.818913

Filename

1255952