Research on temperature field in high-power Nd: YAG single crystal fiber laser by analytical method
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摘要: 采用解析法对Nd：YAG单晶光纤激光器热效应相关的光纤温度场分布进行研究。建立了Nd：YAG单晶光纤热模型，在单晶光纤所满足的边界条件下通过解析求解热传导方程，得到在高功率808 nm泵浦光抽运下产生946 nm激光的单晶光纤温度场分布，并与传统Nd：YAG激光晶体的温度场进行比较，然后分别与同泵浦条件下的有限元数值方法的分析结果进行研究对比，最后分析泵浦光参数、单晶光纤参数等对温度场的影响。结果表明，功率为86 W的泵浦光入射至单晶光纤端面的最高温升仅为30.98℃，明显优于同泵浦条件下传统Nd：YAG晶体的端面温升结果94.37℃，与有限元数值法得到的Nd：YAG单晶光纤19℃温升结果相比，该解析法结果更接近于实验的测量值31℃，能够更精确描述晶体光纤温度场。本文可对单晶光纤激光器热效应的精确研究提供一定参考，进而有利于提高单晶光纤激光器的性能。Abstract: Single Crystal Fiber (SCF) laser is widely applied into scientific research and engineering, owing to its superior thermal management, compact mechanical structure and high power output. In this paper, the temperature field of an Nd:YAG SCF laser related to thermal effect produced by pump laser is presented. By solving the heat conduction equation with the analytical method, the thermal model of Nd:YAG SCF is studied. The temperature distribution of Nd:YAG SCF producing a 946 nm laser by an 808 nm pumping light with power of 86 W is obtained. Results show that the maximum temperature rise at the incident end face of SCF is 30.98℃, obviously lower than that of an Nd:YAG crystal of 94.37℃ under the same conditions. Besides, compared with a temperature rise of 19℃ in SCF obtained by Finite Element Analysis(FEA), temperature rise calculated by analytical method are closer to the experimentally measured value of 31℃. This indicates that the analytical method is more realistic and accurate in describing the temperature field of Nd:YAG SCF. The temperature characteristics of the SCF and the influence of some important parameters are also studied. One of the key factors is the absorption coefficient of the SCF, which has an approximately linear relationship with its temperature rise. Another factor is the core radius of the SCF, which is proportional in value to the rise in temperature. The temperature rise increases with core radius, while decreasing with beam radius of 808 nm pump laser. The root mean square is applied to precisely describe the temperature affected by these parameters. According to the data analysis, uniform distribution in the temperature field can be realized by appropriately selecting the above parameters. The research can be a reference for controlling the thermal effect of single crystal fiber lasers and improving its performance.
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Key words:
- fiber laser /
- single crystal fiber /
- analytic method /
- temperature field
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图 5 吸收系数对Nd :YAG单晶光纤温度分布的影响
Figure 5. Influence of absorption coefficient on temperature distribution of Nd :YAG SCF
图 6 纤芯尺寸对Nd :YAG单晶光纤温度分布的影响
Figure 6. Influence of SCF core radius on temperature distribution
图 7 泵浦光光斑尺寸对Nd :YAG单晶光纤温度分布的影响
Figure 7. Influence of pump laser beam radius on temperature distribution
图 8 单晶光纤端面温升的有限元方法分析结果
Figure 8. Temperature rise of the incident end face of Nd:YAG SCF calculated by finite element analysis
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[1] LIMPERT J, DEGUIL R N, MANEK H I, et al.. High-power rod-type photonic crystal fiber laser[J]. Opt. Express, 2005, 13(4):1055-1058. http://d.old.wanfangdata.com.cn/NSTLQK/NSTL_QKJJ0227131697/ [2] 孟佳, 张伟, 赵开祺, 等.国产化掺铥光纤激光振荡器性能研究[J].中国光学, 2019, 12(5):1109-1117. doi: 10.3788/CO.20191205.1109MENG J, ZHANG W, ZHAO K Q, et al.. Investigation on the performance of a homemade thulium-doped fiber laser oscillator[J]. Chinese Optics, 2019, 12(5):1109-1117. (in Chinese) doi: 10.3788/CO.20191205.1109 [3] 赵小丽, 张钰民, 庄炜, 等.级联光栅结合Sagnac环的可调谐光纤激光器[J].发光学报, 2019, 40(3):357-365. http://d.old.wanfangdata.com.cn/Periodical/fgxb201903011ZHAO X L, ZHANG Y M, ZHUANG W, et al.. Tunable fiber laser based on cascaded grating combing with sagnac loop[J]. Chinese Journal of Luminescence, 2019, 40(3):357-365. (in Chinese) http://d.old.wanfangdata.com.cn/Periodical/fgxb201903011 [4] 高静.可调谐锁模光纤激光器泵浦的超连续谱光源[J].光学 精密工程, 2018, 26(1):25-30. http://d.old.wanfangdata.com.cn/Periodical/gxjmgc201801004GAO J. Tunable mode-locked fiber laser pumped supercontinuum source[J]. Opt.Precision Eng., 2018, 26(1):25-30. (in Chinese) http://d.old.wanfangdata.com.cn/Periodical/gxjmgc201801004 [5] 史健松, 于源华, 王美娇, 等.光纤生物传感器在HER3抗体药物定量检测中的应用[J].中国光学, 2018, 11(3):503-512. doi: 10.3788/CO.20181103.0503SHI J S, YU Y H, WANG M J, et al.. Application of optical fiber biosensor in quantitative detection of HER3 antibody[J]. Chinese Optics, 2018, 11(3):503-512. (in Chinese) doi: 10.3788/CO.20181103.0503 [6] 曹忠, 李文峰, 刘陈, 等.基于低功耗蓝牙传输的电位型嵌入式无线传感监测系统的研制[J].分析化学, 2019, 47(2):229-236. http://d.old.wanfangdata.com.cn/Periodical/fxhx201902009CAO ZH, LI W F, LIU CH, et al.. Design and fabrication of embedded wireless monitoring system based on bluetooth low energy transmission for potentiometric sensor[J]. Chinese J. Anal. Chem., 2019, 47(2):229-236. (in Chinese) http://d.old.wanfangdata.com.cn/Periodical/fxhx201902009 [7] 高颖, 戴连奎, 朱华东, 等.基于拉曼光谱的天然气主要组分定量分析[J].分析化学, 2019, 47(1):67-76. http://d.old.wanfangdata.com.cn/Periodical/fxhx201901009GAO Y, DAI L K, ZHU H D, et al.. Quantitative analysis of main components of natural gas based on Raman spectroscopy[J]. Chinese J. Anal. Chem., 2019, 47(1):67-76. (in Chinese) http://d.old.wanfangdata.com.cn/Periodical/fxhx201901009 [8] MARKOVIC V, ROHRBACHER A, HOFMANN P, et al.. 160W 800 fs Yb:YAG single crystal fiber amplifier without CPA[J]. Optics Express, 2015, 23(20):25883-25888. [9] WU T C, CHI Y C, WANG H Y, et al.. Blue laser diode enables underwater communication at 12.4 Gbps[J]. Scientific Reports, 2017, 7:40480. [10] OU S L, CHEN S C, LIN Y C, et al.. Characterization and crystallization kinetics of sputtered NiSi thin films for blue laser optical recording application[J]. Vacuum, 2017, 140:144-148. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=2c3a5d9999f05e36cd9cde5b08f9f5ca [11] DOHI O, YAGI N, MAJIMA A, et al.. Diagnostic ability of magnifying endoscopy with blue laser imaging for early gastric cancer:a prospective study[J]. Gastric Cancer, 2017, 20(2):297-303. [12] 俞航航, 陈飞, 李耀彪, 等.双光子吸收碱金属蒸气激光器研究进展[J].中国光学, 2019, 12(1):38-47. doi: 10.3788/CO.20191201.0038YU H H, CHEN F, LI Y B, et al.. Research progress on the two-photon absorption alkali vapor laser[J]. Chinese Optics, 2019, 12(1):38-47. (in Chinese) doi: 10.3788/CO.20191201.0038 [13] BOBROVNIKOV S M, VOROZHTSOV A B, GORLOV V, et al.. Lidar detection of explosive vapors in the atmosphere[J]. Russian Physics Journal, 2016, 58(9):1217-1225. [14] ZHANG G, ZHU H Y, HUANG CH H, et al.. Diode-side-pumped Nd:YAG laser at 1338 nm[J]. Optics Letters, 2009, 34(10):1495-1497. http://d.old.wanfangdata.com.cn/NSTLQK/NSTL_QKJJ0231410689/ [15] DÉLEN X, MARTIAL I, DIDIERJEAN J, et al.. 34W continuous wave Nd:YAG single crystal fiber laser emitting at 946 nm[J]. Applied Physics B, 2011, 104:1-4. [16] DEYRA L, MARTIAL I, DIDIERJEAN J, et al.. 3W, 300μJ, 25ns pulsed 473nm blue laser based on actively Q-switched Nd:YAG single-crystal fiber oscillator at 946 nm[J]. Optics Letters, 2013, 38(16):3013-3016. [17] ZHOU Q H, CHEN L F, XU X Y. Numerical analysis of the output power of the injection-locked CW Ti:sapphire lasers[J]. Optics Communications, 2011, 284(13):3378-3382. [18] NGUYEN V B, GUBANOVA L A, HOANG T L. Suppression of parasitic modes in a YAG:Nd slab laser using selective coating[J]. Journal of Optical Technology, 2018, 85(1):53-57. -
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