title: Energy level systems and transitions of Ho:LuAG laser resonantly pumped by a narrow line-width Tm fiber laser.
abstract: We presented a Ho:LuAG ceramic laser in-band pumped by a narrow emission line-width Tm fiber laser at 1907 nm. All of potential transitions between 5I7 and 5I8 manifold were discussed to form the Ho's in-band-pump energy level systems, which were not described in details earlier. For the emission band centered at ~2095 nm, both laser absorption and emission transition separately consisted of two groups were first analyzed and observed. Using output couplers (OCs) with different transmittances (T = 6, 10 and 20%), the similar ~0.5 W continuous-wave (CW) output power under an incident pump power of ~4.9 W was obtained, with twin (or triplet) emission bands respectively. The blue shift of center emission wavelengths was observed with the increase of transmittances.
authors.forename: Hao
authors.initials: H
authors.lastname: Chen
authors.forename: Ting
authors.initials: T
authors.lastname: Zhao
authors.forename: Hao
authors.initials: H
authors.lastname: Yang
authors.forename: Le
authors.initials: L
authors.lastname: Zhang
authors.forename: Tianyuan
authors.initials: T
authors.lastname: Zhou
authors.forename: Dingyuan
authors.initials: D
authors.lastname: Tang
authors.forename: Chingping
authors.initials: C
authors.lastname: Wong
authors.forename: Yung-Fu
authors.initials: YF
authors.lastname: Chen
authors.forename: Deyuan
authors.initials: D
authors.lastname: Shen