Output optimization for pumping solid state lasers with fiber-coupled laser diodes

Yung-Fu Chen*, S. C. Wang, C. F. Kao, K. H. Lin, T. M. Huang, W. H. Huang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A useful model has been developed for the optimization of fiber-coupled laser-diode pumped lasers by including the effect of pump beam quality into the mode overlap integrals. Simple analytical expressions for the optimum pump spot size, the threshold pump power, and the slope efficiency have been derived by fitting the numerical results of the mode overlap integrals to an analytical function which is in terms of laser-diode beam quality and properties of the active medium. With these expressions the optimum mode size and the maximum output efficiency can be calculated for arbitrary values of pump beam quality and input power. Also, we obtained an analytical expression to relate the required input power and pump beam quality to the desired output efficiency and properties of an active medium. The present model provides a straightforward procedure to design the laser resonator and the optical coupling system for output optimization. To illustrate the utility of the present model, a Nd:YAG laser pumped by fiber-coupled laser diodes is considered and optimized. Experimental results have shown a fairly good agreement with the theoretical predictions.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsSui-Sheng Mei, Keith A. Truesdell
Pages184-193
Number of pages10
DOIs
StatePublished - 1 Dec 1996
EventHigh-Power Lasers: Solid State, Gas, Excimer, and Other Advanced Lasers - Beijing, China
Duration: 4 Nov 19965 Nov 1996

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume2889

Conference

ConferenceHigh-Power Lasers: Solid State, Gas, Excimer, and Other Advanced Lasers
CityBeijing, China
Period4/11/965/11/96

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  • Cite this

    Chen, Y-F., Wang, S. C., Kao, C. F., Lin, K. H., Huang, T. M., & Huang, W. H. (1996). Output optimization for pumping solid state lasers with fiber-coupled laser diodes. In S-S. Mei, & K. A. Truesdell (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (pp. 184-193). (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 2889). https://doi.org/10.1117/12.253251