Manufacture and spectroscopic analysis of Tm³⁺-doped silica glass and microstructure optical fiber through the laser sintering technique

Abstract

We demonstrated how a Tm3+-doped silica glass rod was successfully manufactured by the laser sintering technique and made into a Tm3+-doped microstructure optical fiber by the stack-capillary-draw method. Based on the absorption spectrum, the core glass shows outstanding spectroscopic properties through Judd-Ofelt analysis. The fiber core-cladding structure was preserved completely without any crystallization in the core. Besides, a self-built fiber laser at 1.95 μm produces 740 mW output power with a slope efficiency of 16.73%. The results prove that our laser sintering technique is a promising preparation method to acquire fiber materials for a 2.0 μm laser.

All-fiber laser amplification at 1948 nm based on double-cladding Tm/Al co-doped photonic crystal fiber fabricated by laser additive manufacturing

“…Furthermore, various fabrication methods have been applied to get a large mode area and high-doping core materials [17][18][19][20] . In 2019, Chen et al fabricated the Tm/Al codoped PCF by the laser sintering technique to get 740 mW output power at 1.95 μm and a slope efficiency of 16.73% [21] . In 2020, Liu et al used laser additive manufacturing technology to produce Tm/Al co-doped 2 μm PCF and obtained a slope efficiency of 13.9% [22] .…”

Nano-Crystallization of Ln-Fluoride Crystals in Glass-Ceramics via Inducing of Yb3+ for Efficient Near-Infrared Upconversion Luminescence of Tm3+

“…The nano-crystallized GCs still possess high optical transmittance and the UC luminescence efficiency in GCs can be greatly enhanced, as compared to glass, when Ln 3+ ions are successfully incorporated into the crystal structures featuring lower probability of non-radiative transition ascribed to the lower phonon energy. So far, Yb 3+ -Tm 3+ co-doped GCs have been considered as significantly optical gain materials for UC NIR fiber lasers, noncontact optical thermometers, and bio-imaging [ 23 , 24 , 25 , 26 ]. Generally, Ln 3+ ions were expected to incorporate into the crystal structures via the ionic substitution for Y 3+ , La 3+ , Lu 3+ , Sc 3+ , and Sr 2+ in the GCs embedded with Na(Y/La/Lu)F 4 , LaF 3 , YF 3 , KSc 2 F 7 , and SrF 2 crystals, etc [ 27 , 28 , 29 , 30 , 31 ].…”

Dielectric function and band gap modulation in perovskite SrRuO3 thin film

“…Spectroscopic ellipsometry (SE), as a highly sensitive and non-destructive detection technology, is generally employed to determine the energy dispersion of complex dielectric functions. [10][11][12] In order to explore the relation of SRO film thickness and dielectric functions, conventionally a series of samples with different thickness should be prepared by the pulse laser deposition (PLD) method. 13,14) However, the deviation of different chamber parameters for multiplesample deposition will no doubt cause unreasonably errors in thickness dependents of dielectric functions, 15,16) resulting in the inaccuracy of the dielectric modulation.…”