Rate Equation Analysis of the 2.9μm Holmium-Doped Potassium Lead Bromide (Ho: KPb 2 Br 5 ) Transition for Diode Laser Application.

Abstract

Spectroscopic properties of the infrared (IR) emission of trivalent holmium (Ho 3+ ) dopedpotassium lead bromide have been investigated. Following optical excitation at ~ 907nm, severalIR emissions were observed at room temperature with wavelengths around 1.07, 1.20, 1.35, 1.70,2.00, 2.90, and 3.96μm. The 2.9μm emission arising from the μm. The 2.9μm emission arising from the m. The 2.9μm. The 2.9μm emission arising from the m emission arising from the 5 I 6μm. The 2.9μm emission arising from the → 5 I 7 transition was further investigated for possible applications in mid – IR lasers. The population dynamics of the ground state ( 5 I 8 ) and the first three excited states ( 5 I 7 , 5 I 6μm. The 2.9μm emission arising from the , and 5 I 5 ) were studied. Measured lifetime values of these excited states were used in a MATLAB program written to solve a system of four coupled differential equations to determine the population dynamics of the first three excited states in order to see the sustainability of the 2.9μm. The 2.9μm emission arising from the m transition for possible laser applications. The results we obtained shows that the holmium (Ho 3+ ) doped Potassium Lead Bromide crystal was a suitable gain medium for pulsed laser emission at 2.9μm. The 2.9μm emission arising from the m with pulse duration of a few milliseconds.