Cross-relaxation induced efficient 1.55 μm emission in La1.95Er0.05Ti2O7 towards an application as an amplifier for silica-fibers

• Published in: Optical materials Vol. 137; p. 113555
• Main Authors: F, Mselmi, I, Elhamdi, N, Ben Amor, M, Bejar, E, Dhahri
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.03.2023
• Subjects: 1.55 µm emission; Cross-relaxation; Optical amplifier; Silica-fibers, Er3+ ions; Cross-relaxation; Optical amplifier; Silica-fibers, Er3+ ions; 1.55 µm emission
• ISSN: 0925-3467; 1873-1252
• DOI: 10.1016/j.optmat.2023.113555

The La2-xErxTi2O7 samples (with x = 0 and 0.05) were synthesized using the conventional solid-state reaction method. The spectroscopic properties of the La2-xErxTi2O7 sample (x = 0.05) were investigated. The temperature-dependence emission spectra of La1.95Er0.05Ti2O7 display several lines in the visible and infrared regions. Under the excitation of a 488 nm laser, the La1.95Er0.05Ti2O7 exhibits efficient infrared emission at 1.55 μm. The intensity of emission bands arising from the transitions 4S3/2 → 4I15/2, 4I13/2 → 4I15/2 increase with increasing temperature. To explain the efficient emission at 1.55 μm, multiphonon-relaxation and energy transfer mechanism that contains cross-relaxation processes were proposed. Under a pump of 488 nm; La1.95Er0.05Ti2O7 could serve as an amplifier for silica fibers and can be used to fabricate green light-emitting displays. •La2-xErxTi2O7 (with x = 0% and 5%) samples elaborated by solid-state reaction method.•The temperature-dependence emission spectra of La1.95Er0.05Ti2O7 display several lines in the visible and infrared regions.•Under the excitation of 488 nm laser, La1.95Er0.05Ti2O7 exhibits efficient emission at 1.55 μm.•Under a pump of 488 nm, La1.95Er0.05Ti2O7 could serve as an amplifier for silica fibers.