Optical coherence and energy-level properties of a Tm${}^{3+}$-doped LiNbO${}_3$ waveguide at sub-Kelvin temperatures

Neil Sinclair, Daniel Oblak, Erhan Saglamyurek +3

We characterize the optical coherence and energy-level properties of the 795 nm ${}^3$H${}_6$ to ${}^3$H${}_4$ transition of Tm${}^{3+}$ in a Ti${}^{4+}$:LiNbO${}_3$ waveguide at temperatures…