High efficient continuous wave operation of a Ho:YAP laser at room temperature

Abstract

Abstract:We report the room temperature continuous wave Ho:YAP laser double-pass pumped by a diode-pumped Tm:YLF laser. Continuous wave output power of 10.2 W at 2118 nm was obtained under the incident pump power of 19.4 W, corresponding to a slope efficiency of 64.0% and a conversion efficiency of 52.6%. The laser operated at a single mode (TEM00) with a beam quality factor of M 2 ∼ 1.4.

In-band pumped Ho:YAP laser by Tm-Doped fiber laser at 1936 and 1948 nm, respectively

“…Pumping the Ho:YAG and Ho:YLF crystals are necessary to acquire the precisely matched wavelength because the two kind of Ho doped crystals have a narrow absorption peak in the 1.9 µm regions. Recently, another Ho doped crystals: Ho:YAP is reported to highly efficient output 2.1 µm laser in band pumped by a 1908 nm Tm:YLF laser [18], and a 1937 nm Tm doped fiber laser [19]. The Ho:YAP laser has acted as very highly efficient ZnGeP OPO pump sources [20].…”

Q-switched operation of a-cut Ho:YAlO3 laser pumped by a diode-pumped 1.91 μm thulium laser

“…With the development of 1.9 µm laser as an efficient pump source [8,9], resonantly pumped Ho lasers [10][11][12][13] become prominent in these applications. Compared with other Ho doped materials, the broad absorption band of Ho:YAP with multiple intense peaks around 1.9 µm makes it easy for Tm doped laser pumping [14][15][16].…”

A high efficiency Ho:YAlO3 laser pumped by Tm:YLF laser with a Volume Bragg Grating

“…Therefore, it is expected to have potential applications in wide range of fields, such as atmospheric remote sensing which include Doppler radar wind sensing and water vapor profiling by differential absorption radar, spec troscopy and basic research [1][2][3][4][5]. Furthermore, high power quasi continuous wave (QCW) 2 µm lasers with high peak power are effective pump sources of optical parametrical oscillators and solid state lasers further in the mid infrared region [6][7][8][9][10].…”