Analytical model for output optimization of fiber-coupled laser-diode end-pumped lasers

Yung Fu Chen; S. C. Wang; Ting-Ming Huang; C. F. Kao; Chi Luen Wang

doi:10.1117/12.273679

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2 May 1997 Analytical model for output optimization of fiber-coupled laser-diode end-pumped lasers

Yung Fu Chen, S. C. Wang, Ting-Ming Huang, C. F. Kao, Chi Luen Wang

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Proceedings Volume 2989, Modeling and Simulation of Higher-Power Laser Systems IV; (1997) https://doi.org/10.1117/12.273679
Event: Photonics West '97, 1997, San Jose, CA, United States

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 a 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.

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Yung Fu Chen, S. C. Wang, Ting-Ming Huang, C. F. Kao, and Chi Luen Wang "Analytical model for output optimization of fiber-coupled laser-diode end-pumped lasers", Proc. SPIE 2989, Modeling and Simulation of Higher-Power Laser Systems IV, (2 May 1997); https://doi.org/10.1117/12.273679

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