Crystal host engineering for transition metal lasers

Much progress has been made in the power and energy scaling of mid-infrared lasers based on transition metal ions, such as Cr2 + , Co2 Fe2 zinc cadmium chalcogenides. Still, exploration physics these devices is incomplete. In this work, we analyze absorption spectra collected from ions several binary, ternary, quaternary host crystals at temperatures a few degrees Kelvin to room temperature. We use zero-phonon lines low-temperature calculate value crystal field hosts. plot energies with respect anion–cation distance show that their strengths deviate somewhat trend predicted by theory. model which previously developed describe upper state lifetime predict steady-state radiative efficiency Fe:II–VI materials The impact relative crystalline disorder output characteristics Cr:ZnS, Cr:ZnSe, Fe:ZnSe, Fe:CdMnTe explored. effect decreased long-range order observed broadening -doped ternary alloys, spectral linewidth continuous-wave lasers, reduction portion Cr:ZnSe emission spectrum accessible for modelocked lasing. This survey provides richer picture tradespaces can be leveraged when producing laser