Solid-state-reaction fabrication and properties of a high-doping Nd:YAG transparent laser ceramic

Abstract

High-quality neodymium-doped yttrium aluminum garnet (Nd:YAG) transparent ceramic (4.0 mole percent) was fabricated by a solid-state reaction method and vacuum sintering. The microstructure, optical transmittance, spectral properties and laser performance were investigated. The average grain size of the sample is about 10 mm. The transmittance of a 2.8-mm thick sample reaches 79.5% at the laser wavelength of 1064 nm. The highest absorption peak is centered at 807 nm and the absorption coefficient is 13.9 cm 21 . The absorption coefficient at the laser wavelength is 0.2 cm 21 . The main emission peak is at 1064 nm and the fluorescence lifetime is 102 ms. A laser diode (808 nm) whose maximum output is about 1000 mW was used as a pump source and an endpumped laser experiment was performed. The 1064 nm-CW-laser output was obtained and the threshold is 733 mW. With 998 mW of maximum absorbed pump power, a laser output of 17 mW is obtained with a slope efficiency of 6.1%.

An exceed 60% efficiency Nd:YAG transparent ceramic laser with low attenuation loss effect

“…Among the important milestones, the gain medium with high optical quality is the key factor for highly efficient laser oscillation. Therefore, optical properties including optical absorption, emission spectra, and fluorescence lifetime have been widely studied for Nd:YAG ceramics [8][9][10], and very similar results were obtained with those of Nd:YAG single crystals. However, the well-known attenuation loss that has enormous influence on the laser performance is rarely available.…”

Laminar‐Structured YAG/Nd:YAG/YAG Transparent Ceramics for Solid‐State Lasers

“…The purpose of this study was to prepare a laser ceramic composite with a layer‐by‐layer structure and make the process as simple as possible. The general process is similar to that reported in our previous work 7–13 . In this paper, spray drying was not used, and the starting powders are commercially available α‐Al 2 O 3 , Y 2 O 3 , and Nd 2 O 3 powders without pretreatment.…”

“…The general process is similar to that reported in our previous work. [7][8][9][10][11][12][13] In this paper, spray drying was not used, and the starting powders are commercially available a-Al 2 O 3 , Y 2 O 3 , and Nd 2 O 3 powders without pretreatment.…”

Influence of different diffusion rates of reaction reagents on the synthesis of yttrium aluminium garnet (YAG)

“…In recent years several chemical synthesis methods have been developed and successfully used for the production of pure phase YAG powders. These methods include the coprecipitation [10,11], spray-pyrolysis [12,13], homogeneous precipitation [14,15], sol-gel method [16,17], solid-state method [18,19] and others.…”