High-efficiency continuous-wave and LGS electro-optically Q-switched Tm: LuAG laser in-band pumped at 1623 nm

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology Pub Date : 2024-10-12 DOI:10.1016/j.optlastec.2024.111947

Wensheng Zhang , Linjun Li , Hong Liang

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Abstract

We present a high-efficiency continuous-wave and LGS electro-optically Q-switched Tm:LuAG laser for the first time in this paper. The in-band pumping structure was realized by using a MgO:PPLN optical parametric oscillator at 1623 nm as the pump source. Under high-efficiency CW regime, a maximum output power of 10.8 W at 2023 nm was obtained under an incident pump power of 19.2 W, corresponding to a slope efficiency of 60.5 % and an optical-to-optical efficiency of 56.3 %. In addition, with 90/10 knife-edge method, the M²-factors in the x- and y-directions were measured to be about 1.3 and 1.2 at maximum output power, respectively. Under the EO Q-switching regime, a maximum average output power of 5.62 W was achieved under an incident pump power of 19.2 W and a repetition rate of 3000 Hz, corresponding to a slope efficiency of 34.2 %. With a repetition rate of 500 Hz, a maximum pulse energy of 8.14 mJ and a minimum pulse width of 32 ns were achieved with an incident pump power of 19.2 W, corresponding to a maximum calculated peak power of 254 kW.

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高效连续波和 LGS 电 Q 开关 Tm：波长为 1623 nm 的带内泵浦 LuAG 激光器

我们在本文中首次介绍了一种高效连续波和 LGS 电光 Q 开关 Tm:LuAG 激光器。带内泵浦结构是通过使用 1623 nm 波长的 MgO:PPLN 光参量振荡器作为泵浦源实现的。在高效 CW 模式下，入射泵浦功率为 19.2 W 时，2023 nm 波长处的最大输出功率为 10.8 W，对应的斜率效率为 60.5 %，光对光效率为 56.3 %。此外，采用 90/10 刀刃法，在最大输出功率下，测得 x 方向和 y 方向的 M2 因子分别约为 1.3 和 1.2。在 EO Q 开关机制下，入射泵功率为 19.2 W、重复频率为 3000 Hz 时，最大平均输出功率为 5.62 W，斜率效率为 34.2%。重复频率为 500 Hz 时，入射泵功率为 19.2 W，最大脉冲能量为 8.14 mJ，最小脉冲宽度为 32 ns，计算得出的最大峰值功率为 254 kW。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optics and Laser Technology 物理-光学

CiteScore

8.50

自引率

10.00%

发文量

1060

审稿时长

3.4 months

期刊介绍： Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication. The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas: •development in all types of lasers •developments in optoelectronic devices and photonics •developments in new photonics and optical concepts •developments in conventional optics, optical instruments and components •techniques of optical metrology, including interferometry and optical fibre sensors •LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow •applications of lasers to materials processing, optical NDT display (including holography) and optical communication •research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume) •developments in optical computing and optical information processing •developments in new optical materials •developments in new optical characterization methods and techniques •developments in quantum optics •developments in light assisted micro and nanofabrication methods and techniques •developments in nanophotonics and biophotonics •developments in imaging processing and systems