Vol. 32 No. 4 (2022)

Simple Design of Double-Layer Antireflection Coating for Er-Doped Glass Laser Application

Van Huy Mai
Le Quy Don Technical University
Chi Dung Duong
Department of Optical Devices
Hoang Hai Le
Department of Optical Devices
Linh Khuong Tran
Department of Optical Devices, Le Quy Don Technical University, 236 Hoang Quoc Viet, Hanoi
Alexandre Jaffré
Laboratoire Génie Électrique et Électronique de Paris (GeePs) - CNRS – CentraleSupélec
Emmanuel Blanc
Laboratoire de Physique des 2 Infinis – Irène Joliot-Curie (IJCLab)
Olivier Schneegans
Laboratoire Génie Électrique et Électronique de Paris (GeePs) - CNRS – CentraleSupélec

Published 15-09-2022


  • lasers; erbium-doped glass; antireflection coatings; thin films; refractive index

How to Cite

Mai, V. H., Duong, C. D. ., Le, H. H. ., Tran, L. K. ., Jaffré, A., Blanc, E. ., & Schneegans, O. . (2022). Simple Design of Double-Layer Antireflection Coating for Er-Doped Glass Laser Application. Communications in Physics, 32(4), 353. https://doi.org/10.15625/0868-3166/17137


In an Erbium-doped glass laser resonator, parasitic light oscillations (yielding a lowering of the output laser beam power) may be avoided by deposition of well-adapted antireflection coatings on the edges of the active glass medium. However, towards laser application, efficient double-layers are scarce in literature. Here, we propose a simple design of double-layer (total thickness < 490nm) composed of thin films of MgF2 and Al2O3, materials that are easy to deposit by electron beam evaporation. Such coating design allows a calculated reflectance to be lower than 0.01% in the considered 1530-1570nm Near-Infrared range.


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