Abstract
A new series of fluorophosphate glass is developed which can be doped with an extremely high concentration of Nd<sup>3+</sup>. The dependence of the optical absorption and emission properties on dopant concentration is reported here for the concentration range 2.5×10<sup>20</sup> to 1.25×10<sup>21</sup> ions/cm<sup>3</sup>. Absorption and emission measurements are performed in order to evaluate the spontaneous emission probability, absorption cross-section, emission cross-section, and laser performance parameters. We have synthesized two glass systems: MBBA/NdI with an Nd<sup>3+</sup> concentration of 2.50×10<sup>20</sup> cm<sup>3</sup> and MBBA/NdII with an Nd<sup>3+</sup> concentration 6.26×10<sup>20</sup> cm<sup>3</sup>. The stimulated emission cross sections are 1.14 and 1.64×10<sup>4</sup> cm<sup>2</sup> for the <sup>4</sup>F<sub>3/2</sub>→<sup>4</sup>I<sub>13/2</sub> transition and 3.68 and 6.68×10<sup>4</sup> cm<sup>2</sup> for the <sup>4</sup>F<sub>3/2</sub>→<sup>4</sup>I<sub>13/2</sub> transition in MBBA/NdI and MBBA/NdII, respectively. Similarly, the extraction efficiencies are measured to be 1.91, 2.31 (<sup>4</sup>FI<sub>3/2</sub>→<sup>4</sup>I<sub>13/2</sub>) and 6.18, 9.41 (<sup>4</sup>F<sub>3/2</sub>→<sup>4</sup>I<sub>11/2</sub>) in MBBA/NdI and the MBBA/NdII, respectively. This new (Mg, Ba)F<sub>2</sub>-based fluorophosphate glass (MBBA system) is promising for broadband compact optical fiber and waveguide amplifier applications.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have