Structure, spectroscopy and laser operation at ∼ 2.8 μm of a novel Er:SGGG crystal

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology Pub Date : 2024-09-17 DOI:10.1016/j.optlastec.2024.111797

Hongyuan Li , Dunlu Sun , Huili Zhang , Jianqiao Luo , Cong Quan , Yang Qiao , Kunpeng Dong , Yuwei Chen , Zhentao Wang , Maojie Cheng

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Abstract

We demonstrate the crystal structure, spectroscopy and laser performance of a novel Er:SGGG crystal grown successfully by Czochralski (Cz) method. The lattice constant is refined to be 12.42 Å and the FWHM of the crystal’s X-ray rocking curve is only 86.4″, indicating an excellent quality. The segregation coefficient of Er³⁺ ions in SGGG is determined to be 1.2. The Er:SGGG crystal displays a specialty in broadening spectrum. There is a wide absorption band near 962 nm, with an absorption bandwidth of 19 nm and a peak absorption coefficient of 5.57 cm⁻¹. Under the conditions of 969 nm laser diode (LD) pumping, with a 400 Hz repetition rate and 300 μs pulse duration, a maximum power 404 mW with slope efficiency of 15.6 % at 2.8 μm is achieved on the Er:SGGG crystal. The M² factors of horizontal and vertical are 1.4 and 1.5, respectively. The results indicate the mid-infrared laser output can be generated in the Er:SGGG crystal, and it is a potential and promising candidate for 2.8 μm laser material.

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新型 Er:SGGG 晶体的结构、光谱和 2.8 μm 波长的激光操作

我们展示了用 Czochralski（Cz）方法成功生长的新型 Er:SGGG 晶体的晶体结构、光谱和激光性能。晶体的晶格常数被细化为 12.42 Å，X 射线摇摆曲线的 FWHM 仅为 86.4″，表明晶体质量极佳。经测定，SGGG 中 Er3+ 离子的偏析系数为 1.2。Er:SGGG 晶体在拓宽光谱方面具有特殊性。在 962 nm 附近有一个很宽的吸收带，吸收带宽为 19 nm，峰值吸收系数为 5.57 cm-1。在 969 nm 激光二极管（LD）泵浦、400 Hz 重复频率和 300 μs 脉冲持续时间条件下，Er:SGG 晶体在 2.8 μm 波长处的最大功率为 404 mW，斜率效率为 15.6%。水平和垂直的 M2 因子分别为 1.4 和 1.5。结果表明，Er:SGGG 晶体可以产生中红外激光输出，是一种有潜力、有前途的 2.8 μm 激光材料。

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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