Characterization of the optical gain at 1550 nm of erbium-oxalate single crystals

Author(s)

Lopez-Romero, R. E. ; Perez-Sanchez, G. G. ; Aldaya, I. ; Medina, D. Y. ; Martinez-Pineiro, E. L. ; Figueroa, I. A. ; Escudero, R.

• Document type: Journal article
• Source: OPTICAL MATERIALS EXPRESS; v. 14, n. 5, p. 10-pg., 2024-05-01.

Abstract

Erbium is well -recognized as a key element for optical amplification at the 1550 nm operation band. However, the limited solubility of this material in vitreous matrices sets a critical constraint to the achievable optical gain, which limits its applicability in photonic integrated platforms. One of the solutions to increase the concentration of erbium is to employ a crystalline structure instead of a glass. In this paper, we characterize samples of erbium and erbium -ytterbium oxalate single crystals synthesized using the gel diffusion method. X-ray diffraction spectra and thermogravimetric analyses reveal that the synthesis method indeed generated the expected compound, and the pump -and -probe experiments demonstrate an on -off gain coefficient of approximate to 6.5 dB/mm, making this material a high -potential candidate for the implementation of integrated optical amplifiers. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement (AU)

• FAPESP's process: 15/24517-8 - Photonics for next generation internet
• Grantee: Hugo Enrique Hernández Figueroa
• Support Opportunities: Research Projects - Thematic Grants