Optical amplification on the 3P0-3F2 transition in praseodymium-doped fluorozirconate fiber

摘要

Abstract: Optical amplification at the 632.8 nm He-Ne wavelength has been investigated in praseodymium-doped fluorozirconate fiber. A slope efficiency of 0.15 dB/mW was realized with up to 14 dB gain which is a significant improvement on previously reported results. A rate equation approach is used to model and understand the gain dynamics. The lifetime of the $+3$/P$-0$/ state was measured to be 46.5 $POM 0.9 $mu@s. Using Fuchtbauer-Ladenburg analysis, the absorption cross-section at the pump wavelength and the emission cross- section at the signal wavelength were calculated to be 0.39 $POM 0.03 pm$+2$/ and 1.65 $POM 0.15 pm$+2$/ respectively. !18