Open AccessStudy of operation dynamics for crystal temperature measurement in a diode end-pumped monolithic Yb:YAG laser
Author(s) -
Hee−Jong Moon,
Changhwan Lim,
Guang-Hoon Kim,
Ung Gu Kang
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.031506
Subject(s) - materials science , lasing threshold , optics , laser , sapphire , crystal (programming language) , diode , laser diode , optoelectronics , slope efficiency , fiber laser , physics , computer science , programming language
A temperature measurement scheme was proposed in a diode end-pumped thin monolithic Yb:YAG laser by analyzing the red-shifting behaviors of each lasing peak. The amount of peak shift was measured on the basis of the threshold lasing spectrum by using a chopped pump beam. In order to determine the effective scale factor, the ratio between the peak shift and the temperature rise, the dynamics of the spectral shift, the output beam profile, and the output power were investigated. The effective scale factor was determined to be about 0.0114 nm/°C in the case of the crystal sandwiched by copper bocks with a hole, wherein the plane stress approximation is valid. On the other hand, the effective scale factor significantly decreased in the case of the crystal sandwiched by sapphire plates.