4^th International Conference on Photonics July 28-29,2016 Berlin, Germany

Meng Ju is a PhD candidate in the Sichuan University and is funded by the FLASS of the Education University of Hong Kong (EdUHK) as a visitor. Yau-yuen Yeung is a professor in physics and science education in the EdUHK. He has around 200 academic publications in form of book chapters, refereed journal papers, and conference presentations and has organised a number of international conferences.

When yttrium aluminum borate (YAB) crystal is doped with the rare earth ion called neodymium (Nd3+), it becomes a promising system for generating near-infrared lasers1 and for self-frequency-doubling lasers because of its high nonlinear optical coefficient and huge stimulated emission cross section.2 To fully explore the likely transition mechanisms for this system, we carry out a systematic calculations of the transition intensities and radiative features within the 4f3 configuration of Nd3+ by using a complete free-ion Hamiltonian for the f-shell in conjunction with the crystal-field theory and the Judd-Ofelt theory.3 Based on the fitted values of free ion and crystal-field parameters reported by Cascales et. al.,4 the electric dipole (ED) induced transitions for excited states of Nd3+ ion in YAB are calculated. Our theoretical results indicate that the 4F5/2 → 4I9/2 transition is a good candidate for laser action at the near-infrared region. In addition, the magnetic dipole (MD) transitions are also shown with detailed values, providing a large number of strong absorption lines and spontaneous emissions for experimental use.