Paper 13341-20
Paper 13341-20
Enhancement of Cr:LiSAF thermal properties through room temperature bonding
26 January 2025 • 4:35 PM - 4:55 PM PST | Moscone Center, Room 302 (Level 3 South)
Abstract
Inter layer surface activated bonding between Cr3+-doped LiSrF6 (Cr:LiSAF) and sapphire crystal has been demonstrated. The bonding was realized between sapphire crystal and 1.5 at.% doped Cr:LiSAF with anti-reflexion (AR) coating to compensate the Fresnel losses due to large refractive index mismatch between the two materials (1.3 for Cr:LiSAF and 1.8 for sapphire). Thermal diffusivity measurements reveal that the bonding allows an improvement of a factor 3 for the composite material compared to bulk Cr:LiSAF. Based on these results, a bonded chip was designed to handle 20 W pumping for laser operations.
Presenter
Florent Cassouret
Institute for Molecular Science (Japan)
After completing a double degree in solid state chemistry between Chimie ParisTech and the University of Sorbonne in Paris, he completed his PhD in crystal growth of gain medium for visible lasers and on non-linear optics for UV conversion under the supervision of Prof. Gérard AKA at the PSL University in Paris in December 2022. He then joined Prof VIANA's lab as postdoctoral researcher for three months to work on mid-infrared lasers. From April 2023, he works in Prof TAIRA's group on new composite materials for high-power visible lasers and on frequency conversion-based UV-lasers.