Modeling and optimization of high-power Nd/sup 3+/-Yb/sup 3+/ codoped fiber lasers

Author

Yahel, Eldad ; Hess, Ortwin ; Hardy, Amos A.

Author_Institution

Adv. Technol. Inst., Univ. of Surrey Guildford

Volume

24

Issue

3

fYear

2006

fDate

3/1/2006 12:00:00 AM

Firstpage

1601

Lastpage

1609

Abstract

High-power continuous-wave Nd³⁺-Yb³⁺ codoped fiber lasers (NYDFL) are analyzed, based on a rate-propagation equations model. The model takes into account energy transfer between Nd³⁺ and Yb³⁺, as well as cross relaxation between Nd³⁺ ions, and contributions from high-order modes to the amplified spontaneous emission (ASE). Examples of cladding-pumped NYDFLs with distributed Bragg reflector (DBR) at either end are presented. We demonstrate the optimal laser design by considering the effects of the Nd³⁺ and Yb³⁺ concentrations, pump wavelengths multiplexing, output mirror reflectivity, and the laser wavelength. Approximate quasi-analytical solutions are shown to be in good agreement with the exact numerical solutions of the rate equations for practical conditions

Keywords

distributed Bragg reflector lasers; doping profiles; fibre lasers; laser modes; neodymium; optical design techniques; optical pumping; reflectivity; superradiance; ytterbium; ASE; Nd³⁺-Yb³⁺ codoped fiber lasers; amplified spontaneous emission; cladding pumping; cross relaxation; distributed Bragg reflector; energy transfer; ion concentration; output mirror reflectivity; pump wavelengths multiplexing; rate-propagation equations model; Distributed Bragg reflectors; Energy exchange; Equations; Fiber lasers; Laser excitation; Laser modes; Neodymium; Optical design; Pump lasers; Spontaneous emission; Distributed Bragg reflector (DBR) lasers; Neodymium (Nd); Ytterbium (Yb); optical fiber lasers; optical fiber theory;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2005.863324

Filename

1605366