3D laser Raman micro-spectroscopy of Er3+ and Yb3+ co-activated nano-composite phosphosilicate for industrial photonics applications

• Published in: Optics and laser technology 2022-05, Vol.149, p.107761, Article 107761
• Main Authors: Atta, D., Ismail, M.M., Battisha, Inas K.
• Format: Article
• Language: English
• Subjects: Absorptivity; Crystallites; Er3+: Yb3+ ions; Erbium; Laser amplifier materials; Laser applications; Laser spectroscopy; Lasers; Nanocomposites; Optical waveguides; Photoluminescence; Raman mapping; Relaxation time; Sol-gel processes; Sol-gel technique; Spin coating; Thin films; Wave guide materials; Ytterbium
• ISSN: 0030-3992; 1879-2545
• DOI: 10.1016/j.optlastec.2021.107761

[Display omitted] •Phospho-silicate SiO2 – 22 mol %P2O5 formation in monolith and thin film forms.•3D laser based confocal Raman mapping of phosphate glass coated with Er3+ Yr3+.•The prepared thin film coated glasses may be suitable for laser as well as optical amplifiers applications around 1500 nm. Phosphosilicate thin film and monolith co-doped with Er3+-Yb3+ were prepared by self-modified Sol-Gel. Spin coating was used to deposit the prepared samples. The calculated crystallite sizes were found to be 26 and 28 nm for (S22P0.5E0.5YM) sintered at 500 and 1000 °C, respectively. A thickness of 1.6 μm was obtained for (S22P0.5E0.5YM). Laser-based Raman microspectroscopy presents the homogenous distribution of the Er3+&Yb3+ ions. The Er3+&Yb3+ absorption coefficients were measured. The radiative properties for the metastable level 4I13/2 were determined using The Judd–Ofelt model. The electron relaxation time (τr) slightly increased with the Yb3+ ions concentration up to 19.41 ms. Photoluminescence increased with increasing the Yb3+ ions. Pumping the 4F transition 4I13/2 → 4I15/2 of Erbium ions with 650 nm laser emits at around 1500 nm. This study introduces promising results for the prepared samples to support the planar optical waveguide amplifier system that could be used in communication and laser applications. However its cost-effectiveness, on-site measurability is still an interesting matter challenge.