Sk Nayab Rasool, T Sasikala, A Mohan Babu, L Rama Moorthy, C K Jayasankar
Department of Material Science and Engineering, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China; Department of Physics, Rajeev Gandhi Memorial College of Engineering and Technology, Nandyal 518501, Andhra Pradesh, India.
Department of Physics, Sree Vidyanikethan Engineering College, Sree Sainath Nagar College, A. Rangampet 517102, A.P., India.
Spectrochim Acta A Mol Biomol Spectrosc. 2017 Jun 5;180:193-197. doi: 10.1016/j.saa.2017.03.012. Epub 2017 Mar 6.
Neodymium doped phosphate based glasses with composition of (PO+KO+AlO+CaF) were prepared. The samples were analysed through differential thermal analysis (DTA), Fourier transform infrared (FTIR), absorption, emission and decay measurements. Judd-Ofelt parameters (Ω) have been determined from the spectral intensities of absorption bands in order to calculate the radiative parameters like radiative transition probabilities (A), radiative lifetime (τ) and branching ratios (β) for the F→I laser transition of Nd ion. The effective emission bandwidths (Δλ), experimental branching ratios (β) and stimulated emission cross-sections (σ) have been determined from the emission spectrum. The decay curves of the F level exhibited almost single exponential nature for all the Nd ion concentrations.
制备了组成为(PO+KO+AlO+CaF)的掺钕磷酸盐基玻璃。通过差示热分析（DTA）、傅里叶变换红外光谱（FTIR）、吸收、发射和衰减测量对样品进行了分析。从吸收带的光谱强度确定了贾德-奥费尔特参数（Ω），以便计算钕离子F→I激光跃迁的辐射参数，如辐射跃迁概率（A）、辐射寿命（τ）和分支比（β）。从发射光谱中确定了有效发射带宽（Δλ）、实验分支比（β）和受激发射截面（σ）。对于所有钕离子浓度，F能级的衰减曲线几乎呈现单指数性质。
