Title :
Study of Wavelength Dependence of Mode Instability Based on a Semi-Analytical Model
Author :
Rumao Tao ; Pengfei Ma ; Xiaolin Wang ; Pu Zhou ; Zejin Liu
Author_Institution :
Coll. of Optoelectric Sci. & Eng., Nat. Univ. of Defense Technol., Changsha, China
Abstract :
We present theoretical study of wavelength dependence of mode instability (MI) in high power fiber lasers, which employs an improved semi-analytical theoretical model. The influence of pump/seed wavelength and photodarkening on threshold has been studied. The results indicate promising MI suppression through pumping or seeding at an appropriate wavelength. Small amounts of photodarkening can lead to a significant impact on MI.
Keywords :
fibre lasers; laser modes; laser stability; optical pumping; photochromism; high power fiber lasers; mode instability; photodarkening; pump/seed wavelength; semianalytical model; wavelength dependence; Absorption; Couplings; Heating; Optical fiber amplifiers; Optical fiber theory; Photochromism; Mode instabilities; fiber amplifier; thermal effects;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2015.2442760
