Open AccessDirect-laser-written integrated mid-IR directional couplers in a BGG glass
Author(s) -
Arthur Le Camus,
Yannick Petit,
Jean-Philippe Bérubé,
Matthieu Bellec,
Lionel Canioni,
Réal Vallée
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.409527
Subject(s) - optics , femtosecond , laser , materials science , fabrication , inscribed figure , wavelength , photonics , photonic integrated circuit , infrared , radiation , power dividers and directional couplers , optoelectronics , physics , medicine , alternative medicine , geometry , mathematics , pathology
The development of coherent sources and other optical components for the mid-infrared has been hampered by the lack of sturdy materials that can withstand high power radiation or exposition to harsh environment. BGG glasses are robust materials transmitting over the 2.5-5 μm region. We report here the direct femtosecond laser fabrication of efficient directional couplers integrated in a BGG glass chip. The photonic components are characterized from 2.1 to 4.2 μm and compared to similar structures inscribed in silica glass samples. At 2.85 μm, a 99% relative cross transmission is reported in BGG glass. The experimental measurements are in good agreement with the coupled mode theory for wavelengths up to 3.5 μm.