Optical spectroscopy, 1.06μm emission properties of Nd3+-doped phosphate based glasses

Rasool Sk Nayab; Sasikala T; Mohan Babu A; Rama Moorthy L; Jayasankar C K

doi:10.1016/j.saa.2017.03.012

Optical spectroscopy, 1.06μm emission properties of Nd³⁺-doped phosphate based glasses

Spectrochim Acta A Mol Biomol Spectrosc. 2017 Jun 5:180:193-197. doi: 10.1016/j.saa.2017.03.012. Epub 2017 Mar 6.

Authors

Rasool Sk Nayab¹, Sasikala T², Mohan Babu A³, Rama Moorthy L⁴, Jayasankar C K⁵

Affiliations

¹ 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. Electronic address: rasoolphysics08@gmail.com.
² Department of Physics, Sree Vidyanikethan Engineering College, Sree Sainath Nagar College, A. Rangampet 517102, A.P., India.
³ Department of Physics, Sri Venkateswara University, Tirupati 517502, India.
⁴ Department of Physics, Sri Venkateswara University, Tirupati 517502, India; Department of Physics, Chadalawada Ramanamma Engineering College, Renigunta Road, Tirupati 517506, India. Electronic address: lrmphysics@yahoo.co.in.
⁵ Department of Physics, Chadalawada Ramanamma Engineering College, Renigunta Road, Tirupati 517506, India.

PMID: 28292701
DOI: 10.1016/j.saa.2017.03.012

Abstract

Neodymium doped phosphate based glasses with composition of (P₂O₅+K₂O+Al₂O₃+CaF₂) were prepared. The samples were analysed through differential thermal analysis (DTA), Fourier transform infrared (FTIR), absorption, emission and decay measurements. Judd-Ofelt parameters (Ω_λ) have been determined from the spectral intensities of absorption bands in order to calculate the radiative parameters like radiative transition probabilities (A_R), radiative lifetime (τ_R) and branching ratios (β_R) for the ⁴F_3/2→⁴I_11/2 laser transition of Nd³⁺ ion. The effective emission bandwidths (Δλ_eff), experimental branching ratios (β_exp) and stimulated emission cross-sections (σ_e) have been determined from the emission spectrum. The decay curves of the ⁴F_3/2 level exhibited almost single exponential nature for all the Nd³⁺ ion concentrations.

Keywords: DTA luminescence; Glasses; Judd-Ofelt parameters; Optical properties; Stimulated emission cross-section.