title: High-slope-efficiency 2.06 μm Ho: YLF laser in-band pumped by a fiber-coupled broadband diode.
abstract: We first demonstrate the laser performance of a compact 2.06 μm Ho: YLF laser resonantly pumped by a broadband fiber-coupled diode. In continuous-wave (CW) operation, maximum output power of 1.63 W, corresponding to a slope efficiency of 89.2%, was obtained with a near diffraction-limited beam quality. In actively Q-switched operation, maximum pulse energy of 1.1 mJ was achieved at the repetition frequency of 100 Hz. The minimum pulse duration was 43 ns. The performance in both the CW and Q-switched regimes indicates that the current fiber-coupled diode in-band pumped Ho: YLF laser has great potential in certain conditions that require several watts of output power or several millijoules of short pulse energy.
authors.forename: Encai
authors.initials: E
authors.lastname: Ji
authors.forename: Qiang
authors.initials: Q
authors.lastname: Liu
authors.forename: Mingming
authors.initials: M
authors.lastname: Nie
authors.forename: Xuezhe
authors.initials: X
authors.lastname: Cao
authors.forename: Xing
authors.initials: X
authors.lastname: Fu
authors.forename: Mali
authors.initials: M
authors.lastname: Gong
mesh_terms: D055615:Electrical Equipment and Supplies; D054023:Lasers, Semiconductor; D053844:Lasers, Solid-State; D055100:Optical Fibers