Projects per year
Abstract
We present initial measurements of the basic spectroscopic parameters and photodarkening characteristics for a Sm3+-doped aluminophosphosilicate (APS) glass fibre with a large phosphorous-to-aluminium ratio that is pumped at 400 nm using an InGaN diode laser. The spectroscopic parameters are compared with previous studies. We demonstrate that the presence of a P:Al ratio ∼9 leads to the formation of P-related colour centres only, causing absorption in the visible part of the spectrum that directly overlaps with the strongest Sm3+ transitions at 600 nm and 650 nm. We propose an explanation for the photoionization of the P-related defect precursors in high P:Al ratio APS glass based on excited state absorption from the upper state of Sm3+ that is followed by subsequent high-energy UV photons emission. We also establish that large P:Al ratios in APS fiber can effectively inhibit the reduction of Sm3+ to Sm2+. These findings lay the groundwork for further development of visible fibre lasers based on Sm3+-doped silicate glass.
Original language | English |
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Pages (from-to) | 2148-2160 |
Number of pages | 13 |
Journal | Optical Materials Express |
Volume | 14 |
Issue number | 9 |
DOIs | |
Publication status | Published - 1 Sept 2024 |
Projects
- 1 Finished
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DP21: Laser emission at the limit of glass transparency using nanocrystal doping
Jackson, S., Ebendorff-Heidepriem, H. & Lu, Y.
10/03/21 → 9/03/24
Project: Research