Research for temperature distribution characteristics of the fiber in a Bragg fiber laser
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摘要: 为了分析布喇格光纤激光器中光纤的温度分布特性,提出了布喇格光纤激光器中光纤的稳定热模型,通过热传输方程分析了其中的温度分布,并采用数值有限元法对布喇格光纤的温度分布和由此产生的热应力进行了数值研究,然后对热功率密度、光纤包层数和环境对流传热系数对光纤温度分布的影响进行了模拟计算。结果表明,表层温度远低于覆层材料的临界值300℃,而且纤芯和表面的温差大约10℃。研究结果有助于高功率布喇格光纤激光器的耐热设计。Abstract: In order to study the temperature property of the fiber in a Bragg fiber laser, the steady thermal model was presented. The temperature distribution was analyzed based on heat transfer equations. The temperature distribution and the thermally-induced stress in the fiber were simulated by means of numerical finite-element method. Effects of thermal power density, number of cladding layers and environmental convection coefficient on the temperature distribution were discussed. The results show that the temperature of coating is much lower than its critical temperature 300℃, and the temperature difference between the core and coating is only about 10℃. The result of analysis is helpful to the design of Bragg fiber lasers.
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Keywords:
- lasers /
- Bragg fiber laser /
- Bragg fiber /
- thermal effect
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[1] LI K,WANG Y,ZHAO W,et al.High-power double-clad large-mode area phonic crystal fiber laser[J].SPIE,2005,6028 :60280/1-60280/6.
[2] CHEN Z L,HOU J,JIANG Z F.Theoretical study on thermal effect in Yb-doped double-clad high power fiber laser[J].Leaser Technology，2007，31(5):544-550(in Chinese).
[3] YEH P,YARIV A,MAROM E.Theory of Bragg fiber[J].Journal of the Optical Society of America，1978,68(9):1196-1201.
[4] FVRIER S,GAPONOV D D,ROY P,et al.High-power photonic-bandgap fiber laser [J].Optics Letters,2008,33(9):989-991.
[5] CHENG X,XU J.Thermal and thermal-optical effects in high-power photonic crystal fiber lasers[J].Optical Engineering,2006,45(12):124204/1-124204/5.
[6] LIMPERT J,SCHMIDT O,ROTHHARDT J,et al.High-power rode-type photonic crystal fiber laser[J].Optics Express,2005,13(4):1055-1058.
[7] SU H,LI Y,LU K,et al.Wavelength tunable Yb3+-doped double-clad photonic crystal fiber laser[J].SPIE,2007,6823:682318/1-682318/7.
[8] ORTA B,LECAPLAIN C,HIDEUR A,et al.High-power femtosecond Yb-doped single-polarization photonic crystal fiber laser[J].SPIE,2008,6873:687321/1-687321/6.
[9] BOULLET J,ZAOUTER Y,DESMARCHELIER R,et al.94W ytterbium-doped single-mode rode-type photonic crystal fiber laser operating at 977nm[J].SPIE,2008,7195:719504/1-719504/10.
[10] YANG H J,HU Y,LIU J X,et al.Research for light propagation chracteristics of Bragg fiber [J].Journal of Opoelectronics·Laser，2008，18(12):1410-1413(in Chinese).
[11] CHEN H T,YANG H J,LIU P Sh,et al.Optimum design of low-loss hollow OmniGuide fibers[J].Optik,2010,121(23):2113-2116.
[12] ZHU H T,LOU H Q,ZHOU J,et al.Experimental and theoretical study on designing of cooling device for the kilowatt-level double cladding fiber laser [J].Acta Physica Sinica,2008,57(8):4966-4971(in Chinese).
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