{"title":"Tm,Ho:GdVO4 crystal as saturable absorber for the passively Q-switched Tm:YAP laser","authors":"Changchang Shen , Xinlu Zhang , Panqiang Kang , Xiaofan Jing , Longyi Zhang , Bingxu Gu , Jinjer Huang","doi":"10.1016/j.infrared.2025.105797","DOIUrl":null,"url":null,"abstract":"<div><div>A passively Q-switched Tm:YAP laser with Tm,Ho:GdVO<sub>4</sub> crystal as the saturable absorber is reported for the first time. Using a simple flat-concave cavity, a high single pulse energy and high peak power passively Q-switched Tm:YAP laser at 1984 nm was successfully achieved. At an incident pump power of 9.66 W, the maximum average output power was 571 mW, the pulse width was 235 ns, and the pulse repetition rate was 825 Hz, corresponding to the single pulse energy of 0.69 mJ and the peak power of 2.94 kW. The M<sup>2</sup> factors of the passively Q-switched Tm:YAP laser in the x and y directions were 1.32 and 1.28, respectively. This experimental results demonstrate that Tm,Ho:GdVO<sub>4</sub> crystal can be used as saturable absorber for the passively Q-switched solid state laser at 2 μm.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"147 ","pages":"Article 105797"},"PeriodicalIF":3.1000,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Infrared Physics & Technology","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1350449525000908","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"INSTRUMENTS & INSTRUMENTATION","Score":null,"Total":0}
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Abstract
A passively Q-switched Tm:YAP laser with Tm,Ho:GdVO4 crystal as the saturable absorber is reported for the first time. Using a simple flat-concave cavity, a high single pulse energy and high peak power passively Q-switched Tm:YAP laser at 1984 nm was successfully achieved. At an incident pump power of 9.66 W, the maximum average output power was 571 mW, the pulse width was 235 ns, and the pulse repetition rate was 825 Hz, corresponding to the single pulse energy of 0.69 mJ and the peak power of 2.94 kW. The M2 factors of the passively Q-switched Tm:YAP laser in the x and y directions were 1.32 and 1.28, respectively. This experimental results demonstrate that Tm,Ho:GdVO4 crystal can be used as saturable absorber for the passively Q-switched solid state laser at 2 μm.
期刊介绍：
The Journal covers the entire field of infrared physics and technology: theory, experiment, application, devices and instrumentation. Infrared'' is defined as covering the near, mid and far infrared (terahertz) regions from 0.75um (750nm) to 1mm (300GHz.) Submissions in the 300GHz to 100GHz region may be accepted at the editors discretion if their content is relevant to shorter wavelengths. Submissions must be primarily concerned with and directly relevant to this spectral region.
Its core topics can be summarized as the generation, propagation and detection, of infrared radiation; the associated optics, materials and devices; and its use in all fields of science, industry, engineering and medicine.
Infrared techniques occur in many different fields, notably spectroscopy and interferometry; material characterization and processing; atmospheric physics, astronomy and space research. Scientific aspects include lasers, quantum optics, quantum electronics, image processing and semiconductor physics. Some important applications are medical diagnostics and treatment, industrial inspection and environmental monitoring.
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