Photosensitivity of barium germano-gallate glasses under femtosecond laser direct writing for Mid-IR applications
YAO, Heng
Department of Physics, Shanghai University, 200444 Shanghai, People's Republic of China
Institut de Chimie Moléculaire et des Matériaux d'Orsay [ICMMO]
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Department of Physics, Shanghai University, 200444 Shanghai, People's Republic of China
Institut de Chimie Moléculaire et des Matériaux d'Orsay [ICMMO]
YAO, Heng
Department of Physics, Shanghai University, 200444 Shanghai, People's Republic of China
Institut de Chimie Moléculaire et des Matériaux d'Orsay [ICMMO]
Department of Physics, Shanghai University, 200444 Shanghai, People's Republic of China
Institut de Chimie Moléculaire et des Matériaux d'Orsay [ICMMO]
DELULLIER, Pierre
Department of Physics, Shanghai University, 200444 Shanghai, People's Republic of China
DOTA, ONERA, Université Paris Saclay [Palaiseau]
< Reduce
Department of Physics, Shanghai University, 200444 Shanghai, People's Republic of China
DOTA, ONERA, Université Paris Saclay [Palaiseau]
Language
en
Article de revue
This item was published in
Ceramics International. 2021-12-15, vol. 47, n° 24, p. 34235-34241
Elsevier
English Abstract
Barium germano-gallate glasses are attractive glass hosts for photonic applications in the mid-infrared region up to 6 µm. In this work, we investigate the photosensitivity of such glasses under femtosecond laser, with an ...Read more >
Barium germano-gallate glasses are attractive glass hosts for photonic applications in the mid-infrared region up to 6 µm. In this work, we investigate the photosensitivity of such glasses under femtosecond laser, with an emphasize on the formation of refractive index changes. Six glasses with varying compositions (including addition of K, Na, Y, and La) were studied. We observed several transformation regimes in the pulse energyrepetition rate landscape: Type I (isotropic refractive index change) and a spatial broadening regime with a phase shift Δφ > 2π rad at 550 nm. This translates into refractive index changes Δn > 10-2 and is comparable to values obtained in most chalcogenide glasses. The effect of glass composition on Δφ appears correlated to the number of non-bridging oxygen presented in the glass and is brought to evidence by monitoring the Cations/GaO3/2 ratio. This provides a way to design a range of germano-gallate glasses suitable to imprinting high refractive index contrast.Read less <
English Keywords
Barium germano-gallate glass
K/Na/Y/La doping
Femtosecond laser
Refractive index change
ANR Project
Fabrication 3D de composants optiques intégrés à bas cout par laser femtoseconde pour des applications IR - ANR-18-CE08-0004
Origin
Hal imported