• Shift and broadening of emission lines in Nd$^{3+}$:YAG laser crystal influenced by input energy

• # Fulltext

https://www.ias.ac.in/article/fulltext/pram/086/06/1307-1312

• # Keywords

Nd$^{3+}$:YAG crystal; heat generation; three-level emission lines; four-level emission lines; input energy.

• # Abstract

Spectroscopic properties of the flashlamp-pumped Nd$^{3+}$:YAG laser as a function of input energy were studied over the range of 18–75 J. The spectral widths and shifts of quasi-three-level and four-level inter-Stark emissions within the respective intermanifold transitions of $^4$F$_{3/2}$ $\rightarrow$ $^{4}$I$_{9/2}$ and $^{4}$F$_{3/2}$ $\rightarrow$ $^{4}$I$_{11/2}$ were investigated. The emission lines of $^{4}$F$_{3/2}$ $\rightarrow$ $^{4}$I$_{9/2}$ shifted towards longer wavelength (red shift) and broadened, while the positions and linewidths of the $^{4}$F$_{3/2}$ $\rightarrow$ $^{4}$I$_{11/2}$ transition lines remained constant by increasing the pumping energy. This is attributed to the thermal population as well as one-phonon and multiphonon emission processes in the ground state. This phenomenon degrades the output performance of the lasers.

• # Author Affiliations

1. Department of Optics and Laser Engineering, Estahban Branch, Islamic Azad University, Estahban, Iran
2. Department of Physics, College of Sciences, Yasouj University, Yasouj, 75914-353, Iran

• # Pramana – Journal of Physics

Volume 95, 2021
All articles
Continuous Article Publishing mode

• # Editorial Note on Continuous Article Publication

Posted on July 25, 2019