کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
733777 | 893368 | 2012 | 5 صفحه PDF | دانلود رایگان |
Unexpected temperature rise is observed in end-pumped YAG–Nd3+:YAG–YAG slab laser experimentally. The measured optical absorption spectrum of undoped YAG in 780–830 nm indicates an absorption coefficient of 0.015 cm−1 at 808 nm. The influence of the weak absorption on temperature distribution in end-pumped composite slabs is analyzed numerically and a good agreement with infrared measurement is achieved. The results of finite element analysis show that longer heat sinks and wider slabs bring lower temperature.
► An unexpected high temperature is observed experimentally in the undoped YAG end caps.
► The absorption spectrum of undoped YAG in 780–830 nm is measured.
► The weak absorption of undoped YAG cannot always be ignored, especially in high-power operation.
► High quality laser crystal is crucial to high-power solid-state lasers.
► Longer heat sink and wider slab can bring lower end temperature in composite slab.
Journal: Optics & Laser Technology - Volume 44, Issue 6, September 2012, Pages 1738–1742