Spectroscopic properties of ytterbium, praseodymium-codoped fluorozirconate glass for laser emission at 36 μm

Abstract

Excitation of the 2 F 7∕2 → 2 F 5∕2 transition of the Yb 3 ion in Yb 3 , Pr 3 -doped fluorozirconate glass at 974 nm results in efficient excitation of the 1 G 4 level of Pr 3 ion that in turn emits in the middle infrared at ∼3.6 μm. The energy transfer (ET) process Yb 3 2 F 5∕2 → Pr 3 1 G 4 is assisted by fast excitation migration among the Yb 3 ions. An upconversion process involving ET from the 2 F 5∕2 level to the 1 G 4 excited state populates the 3 P 0 excited state that produces emission at 481, 521, 603, 636, and 717 nm. A study of the behavior of the fluorescence from the 1 G 4 level at 1325 nm and from the 3 P 0 level at 603 nm allowed the estimation of the ET rate constants for the processes involved after short-pulsed laser excitation at 974 nm. A rate-equation model was employed to evaluate the population inversion relating to the 1 G 4 → 3 F 4 transition of the Pr 3 ion at 3.6 μm under continuous wave pumping.

Synthesis, characterization and luminescence properties of Eu3+-doped hydroxyapatite nanocrystal and the thermal treatment effects

“…Eqs. (4) and (5) have been used to describe the luminescence kinetic involving energy transfer elsewhere [21][22][23][24].…”

Design of a High Performance Mid-IR Fiber Laser Based on Pr3+-Doped Fluoroindate Glass

“…In this work, for the first time to the best of our knowledge, a continuous wave laser based on a Pr 3+ -doped fluoroindate fiber, emitting at 𝜆 𝑠 = 4 𝜇𝑚 when pumped at 𝜆 𝑝 = 1550 𝑛𝑚, has been designed and optimized, starting from experimental spectroscopical parameters taken from literature [20][21][22][23][24][25] and employing a home-made computer code solver [14].…”