SESAM锁模“混合”Tm: CaYLuAlO4激光器，在1980 nm产生202 fs脉冲

IF 5 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology Pub Date : 2025-07-03 DOI:10.1016/j.optlastec.2025.113416

Jinfang Yang , Xue Qiu , Shichao Yuan , Taotao He , Purui An , Xinye Tian , Chao Bi , Man Wang , Zhong Dong , Weijun Ling

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引用次数: 0

摘要

我们报道了一种半导体可饱和吸收镜（SESAM）锁模飞秒“混合”Tm: CaYLuAlO4 （Tm: CYLA）激光器，工作在1980 nm，在强水蒸汽吸收光谱区，由可调谐Ti：蓝宝石激光器泵浦。最大连续波输出功率可达1.7 W，斜率效率为39.4%，这是基于“混合”Tm: CYLA晶体的连续波体制中最突出的成果。使用SESAM作为锁模启动元件和透射率为0.5%的输出反射镜，在97.8 MHz的重复频率下，获得了短为202 fs的最大平均输出功率为443 mW的脉冲。据我们所知，该实验结果证明了迄今为止报道的单Tm3+掺杂abco4型晶体的最短脉冲持续时间，该晶体有可能产生高功率，2µm的短脉冲。

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SESAM mode-locked “mixed” Tm: CaYLuAlO4 laser generating 202 fs pulses at 1980 nm

We report on a semiconductor saturable absorber mirror (SESAM) mode-locked femtosecond “mixed” Tm: CaYLuAlO₄ (Tm: CYLA) laser operating at 1980 nm, where in the strong water vapor absorption spectral region, pumped by a tunable Ti: sapphire laser. The maximum continuous wave (CW) output power is up to 1.7 W with a slope efficiency of 39.4 %, which demonstrates the most outstanding achievement in CW regime based on “mixed” Tm: CYLA crystal. Using the SESAM as mode-locked staring element and an output mirror with a transmittance of 0.5 %, pulses as short as 202 fs are obtained for a maximum average output power of 443 mW at a repetition frequency of 97.8 MHz. To the best of our knowledge, this experimental result demonstrates the shortest pulse duration so far from the reported single Tm³⁺-doped ABCO₄-type crystal, which is potential to generate high power, few-cycle ultrashort pulses at 2 µm.

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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