Study And Produce High-Thermal Stability Of Ytterbium-Doped Phosphate Glasses

Mixes in ytterbium ion the phosphate laser glass because the ytterbium ion does not have the excited state absorption, the light transfer efficiency is high, the fluorescent lifetime is long, in homogeneous laser material, for neodymium ion fluorescent lifetime more than three times, the long fluorescent lifetime is advantageous to the stored energy. Moreover the pump wave length and the laser output wave length are extremely close, phonon efficiency achieved 90%. Mixes the ytterbium ion laser material is regard as highly effective the development, a high power laser main way.This article divides into the introduction, the optical glass spectrum and the thermostble theory, mixes ytterbium laser glass the spectrum theory, the experiment, the result and discusses five parts. First outlined mixed the ytterbium laser glass the research progress, introduced mixed the ytterbium laser glass the rationale, and has made below the main progress and the result through the comprehensive system experimental study:Due to the high thermal expansion coefficient, phosphate laser glass shows bad thermal and chemical stabilities and low-heat mechanical intensity. By changing the composition of glass such as adding Al₂O₃ å’Œ F₂, and improving preparation technology, the thermal expansion coefficient can be decreased. Introducing Al₂O₃ in glass substrate can decrease thermal expansion coefficient of glasses to α=39.23×10^-7/℃. Introducing F₂ in glasses can not only get rid of water, but also decrease phonon energy of glasses, at the same time, improve phonon efficiency and optimize spectroscopic properties. All the researches extend the application range of ytterbium-doped phosphate laser glasses.