新型高掺铥硅酸盐玻璃光纤及其光纤激光的研究  

Research of novel highly thulium-doped silicate glass fiber and related fiber lasers

作　　者：张钧翔 史伟 史朝督[1,2] 房强 付士杰 盛泉 朱秀山[5] Peyghambarian N 姚建铨 Zhang Junxiang;Shi Wei;Shi Chaodu;Fang Qiang;Fu Shijie;Sheng Quan;Zhu Xiushan;Peyghambarian Nasser;Yao Jianquan(Institute of Laser&Opto-electronics,School of Precision Instrument&Opto-electronics Engineering,Tianjin University,Tianjin 300072,China;Key Laboratory of Opto-electronics Information Technology(Ministry of Education),Tianjin University,Tianjin 300072,China;HFB Photonics Co.,Ltd.,Weihai 264209,China;Tianjin Optera Laser Technology Co.Ltd.,Tianjin 300384,China;College of Optical Science,University of Arizona,Arizona 85721,USA)

机构地区：[1]天津大学精密仪器与光电子工程学院激光与光电子研究所,天津300072 [2]天津大学光电信息技术教育部重点实验室,天津300072 [3]山东海富光子科技股份有限公司,山东威海264209 [4]天津欧泰激光科技有限公司,天津300384 [5]亚利桑那大学光学科学学院,美国亚利桑那州85721

出　　处：《红外与激光工程》2021年第9期178-183,共6页Infrared and Laser Engineering

基　　金：国家重点研发计划(2017YFF0104603);山东省重点研发计划(2017CXCC0808,2019JZZY020206)。

摘　　要：具有高稀土离子掺杂浓度的有源光纤一直以来是高性能单频光纤激光器的核心,选用硅酸盐玻璃材料制作高掺杂有源光纤可以有效提升光纤增益。通过高温熔融工艺制备了铥离子掺杂浓度为8 wt.%的高掺杂硅酸盐玻璃,测试了其光谱特性和荧光寿命,并根据McCumber理论计算玻璃的受激发射截面。采用管棒法制备光纤预制棒,拉制出尺寸为7/125μm的高掺铥硅酸盐玻璃光纤。基于低损耗的异质光纤熔接,测试了该光纤的增益特性,并分别采用2 cm和8 cm的新型掺铥光纤搭建线形腔光纤激光器,获得百毫瓦的1 950 nm激光输出。研究表明,在8 wt.%的高浓度掺杂下,铥离子在文中的新型硅酸盐光纤基质中具备良好的发光能力,这种国产高掺杂玻璃光纤在实现高性能单频光纤激光器方面具有明显优势。Active fiber with high rare earth ion doping concentration has always been the key component of high-performance single-frequency fiber lasers, and silicate glass can be used to fabricate highly doped active fibers with excellent unit gains. Here, highly doped silicate glass with the thulium ion doping concentration of 8 wt.% was prepared by a high-temperature melting process, and its spectral characteristics and fluorescence lifetime were measured. Based on McCumber theory, the emission cross section of the glass was calculated. By the method of rod-in-tube, fiber preforms were prepared, and then the highly thulium-doped silicate glass fiber of 7/125 μm was drawn. Based on low-loss specialty fiber fusion splicing, the fiber unit gain was measured, and linear-cavity fiber lasers based on 2 cm and 8 cm novel thulium-doped fibers were investigated, where 1 950 nm laser output of hundred-milliwatt-level power was obtained. This work has shown that under such a high doping concentration of 8 wt.%, which is the highest thulium doping concentration to date, thulium ions still have good luminescence properties in this novel glass host. The homemade highly thulium-doped glass fiber in this paper can be used to fabricate high performance single-frequency fiber lasers.

关 键 词：高掺铥硅酸盐玻璃光纤 受激发射截面 荧光寿命 线形腔光纤激光器 

分 类 号：TN244[电子电信—物理电子学]