796 nm二极管泵浦连续波1.88 W Tm:LYF激光器

丁本利; 周雄; 夏海平; 张百涛; 陈宝玖

doi:10.37188/fgxb20204107.0819

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796 nm二极管泵浦连续波1.88 W Tm:LYF激光器

器件制备及器件物理 | 更新时间：2020-09-10

- 796 nm二极管泵浦连续波1.88 W Tm:LYF激光器
- 796 nm Diode-pumped 1.88 W Continuous-wave Tm: LYF Laser
- 发光学报 2020年41卷第7期页码：819-825
- 作者机构：
  
  1.宁波大学光电子材料重点实验室, 浙江宁波 315211
  2.山东大学晶体材料研究所晶体材料国家重点实验室, 山东济南 250100
  3.大连海事大学物理系, 辽宁大连 116026
- 作者简介：
  
  [ "丁本利(1997-)，男，安徽安庆人，硕士研究生，2018年于台州学院获得学士学位，主要从事单晶体生长方面的研究。E-mail：2495899049@qq.com" ]
  [ "夏海平(1967-)，男，浙江舟山人，博士，研究员，博士研究生导师，1997年于中国科学院上海光学精密机械研究所获得博士学位，主要从事光学功能材料及其相应器件的研究。E-mail：hpxcm@nbu.edu.cn" ]
  [ "张百涛(1985-)，男，山东潍坊人，博士，副研究员，硕士研究生导师，2012年于山东大学晶体材料研究所获得博士学位，主要从事新型功能晶体材料的测试与表征、非线性频率变换、全固态锁模激光技术、激光放大器、中红外激光器件及新型二维材料光电特性等的研究" ]
- 基金信息：
  
  国家自然科学基金(51772159);浙江省自然科学基金(LZ17E020001)
- DOI：10.37188/fgxb20204107.0819
  中图分类号： O734;O782;TN248
- 收稿：2020-05-02，
  
  录用：2020-5-24，
  
  纸质出版：2020-07
- 稿件说明：
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丁本利, 周雄, 夏海平, 等. 796 nm二极管泵浦连续波1.88 W Tm:LYF激光器[J]. 发光学报, 2020,41(7):819-825.

Ben-li DING, Xiong ZHOU, Hai-ping XIA, et al. 796 nm Diode-pumped 1.88 W Continuous-wave Tm: LYF Laser[J]. Chinese Journal of Luminescence, 2020, 41(7): 819-825.
丁本利, 周雄, 夏海平, 等. 796 nm二极管泵浦连续波1.88 W Tm:LYF激光器[J]. 发光学报, 2020,41(7):819-825. DOI： 10.37188/fgxb20204107.0819.

Ben-li DING, Xiong ZHOU, Hai-ping XIA, et al. 796 nm Diode-pumped 1.88 W Continuous-wave Tm: LYF Laser[J]. Chinese Journal of Luminescence, 2020, 41(7): 819-825. DOI： 10.37188/fgxb20204107.0819.

摘要

用坩埚下降法生长了Tm

掺杂浓度分别为0.8%和1.3%的优质大尺寸LiYF

（LYF）单晶体。测定了单晶体的吸收光谱、发射光谱，并计算了

能级的的最大吸收截面与最大发射截面分别为0.25×10

-20

和0.33×10

-20

。以796 nm半导体激光器（LD）为泵浦源，采用短平板腔结构模型研究了Tm掺杂LYF单晶体在~2.0 μm波段的激光输出性能。当LD泵浦功率为3.4 W时，Tm：YLF晶体的最大激光输出功率为1.88 W，相应的光光转换效率和斜率效率分别为51%和57%。使用半导体可饱和吸收镜抽运Tm掺杂LYF单晶体，测试其在~2.0 μm波段连续波锁模激光运转。当最大抽运功率为3.5 W时，获得锁模激光的最大平均输出功率为200 mW，此时锁模脉冲宽度~20 ps，对应的重复频率63.86 MHz，中心谱线为1.88 μm。结果表明，Tm掺杂LYF单晶体是一种具有较好物理性能的~2 μm波段超快激光晶体。

Abstract

High quality LiYF

(LYF) single crystals in big size doped with Tm

in 0.8% and 1.3% concentrations were grown by Bridgman method. The absorption spectra and emission spectra were measured. The maximum absorption cross section and maximum emission cross section of

level were calculated to be 0.25×10

-20

and 0.33×10

-20

respectively. The laser output of Tm

doped LYF crystals in the ~2.0 μm band was carried out by using short flat-flat cavity taking 796 nm semiconductor laser as pumping source. A maximum CW output of 1.88 W at an absorbed pump power of 3.4 W was achieved from the Tm

doped LYF single crystal

and the corresponding conversion efficiency and slope efficiency for the laser output were 51% and 57%

respectively. A Tm-doped LYF single crystal was pumped using a semiconductor saturable absorption mirror

and its operation in a ~2.0 μm band CW laser was tested. When the maximum pump power is 3.5 W

the maximum average output power of the mode-locked laser is 200 mW. At this time

the mode-locked pulse width is about 20 ps

the corresponding repetition frequency is 63.86 MHz

and the center line is 1.88 μm. The results show that the Tm-doped LYF single crystal is a ~2 μm band ultrafast laser crystal with good physical properties.

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Keywords

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