Influence of thermal effect on output power optimization in fiber-coupled laser-diode end-pumped lasers

Author

Chen, Y.F. ; Kao, C.F. ; Huang, T.M. ; Wang, C.L. ; Wang, S.C.

Author_Institution

Nat. Sci. Council, Hsinchu, Taiwan

Volume

3

Issue

1

fYear

1997

fDate

2/1/1997 12:00:00 AM

Firstpage

29

Lastpage

34

Abstract

A general model has been developed for the output power optimization of fiber-coupled laser-diode end-pumped lasers by including the thermal effect into the analysis. The optical path difference (OPD). Distribution has been derived as a function of the pump-beam quality, focus position of pumping light, and pump radius at the focal plane under the assumption that the end faces of the crystal are thermally insulated. With the derived OPD, the diffraction losses arising from thermal-induced spherical aberration have been estimated by the Strehl intensity ratio. The practical example of an Nd:YVO₄ laser pumped by a 1.2-W fiber-coupled laser diode is considered to illustrate the utility of the present model. Experimental results have shown a fairly good agreement with the theoretical predictions

Keywords

aberrations; light diffraction; neodymium; optical fibre couplers; optical losses; optical pumping; optimisation; solid lasers; 1.2 W; Nd:YVO₄ laser; Strehl intensity ratio; YVO₄:Nd; diffraction losses; end faces; fiber-coupled laser diode; fiber-coupled laser-diode end-pumped lasers; focal plane; focus position; optical path difference; output power optimization; pump radius; pump-beam quality; pumping light; thermal effect; thermal-induced spherical aberration; thermally insulated; Fiber lasers; Insulation; Laser modes; Laser theory; Optical diffraction; Optical losses; Optical pumping; Power generation; Power lasers; Pump lasers;

fLanguage

English

Journal_Title

Selected Topics in Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

1077-260X

Type

jour

DOI

10.1109/2944.585810

Filename

585810