|
|
- 2015
光纤激光阵列占空比对相干合成效果影响分析
|
Abstract:
根据弗琅和费衍射理论,建立了19路、37路和91路光纤激光相干合成模型,仿真模拟了不同占空比情况下,大阵列合成光束在远场的强度分布和光束质量,分析了占空比排布与合成路数对远场光束质量的影响。仿真结果表明,随着光纤阵列占空比的下降, 远场艾里斑内的光强逐渐减小, 合成效果变差;反之,远场艾里斑内的光强逐渐增大,合成光束远场能量集中度增强,光束质量变好。因此,提高相干合成的效果,必须提高光束阵列的占空比。
| [1] | MOUROU G, BROCKLESBY B, TAJIMA T, et al. The future is fibre accelerators[J]. Nature Photonics, 2013(7): 258-261. |
| [2] | HE Bing, LOU Qi-hong, WANG Wei, et al. Experimental demonstration of phase locking of a two-dimensional fiber laser array using a self-imaging resonator[J]. Appl Phys Lett, 2008, 92: 251115-1-251115-3. |
| [3] | GENG Chao, LUO Wen, TAN Yi, et al. Experimental demonstration of using divergence cost-function in SPGD algorithm for coherent beam combining with tip/tilt control[J]. Opt Express, 2013, 21(21): 25045-25055. |
| [4] | HUANG Zhi-meng, LIU Cang-li, LI Jian-feng, et al. A high-speed high-efficiency phase controller for coherent beam combining based on SPGD algorithm[J]. Quantum Electronics, 2014, 44(4): 301-305. |
| [5] | MA Yan-xing, WANG Xiao-lin, LENG Jin-yong, et al. Coherent beam combination of 1.08 kW fiber amplifier array using single frequency dithering technique[J]. Opt Lett, 2011, 36(6): 951-953. |
| [6] | 黄智蒙. 光纤激光主动相位与偏振自适应控制技术研究[D]. 北京: 中国工程物理研究院, 2014. HUANG Zhi-meng. Research on active phase locking and adaptive polarization control technology of fiber lasers[D]. Beijing: China Academy of Engineering Physics, 2014. |
| [7] | AUGST S J, FAN T Y, SANCHEZ A. Coherent beam combining and phase noise measurements of ytterbium fiber amplifiers[J]. Opt Lett, 2004, 29(5): 474-476. |
| [8] | 黄智蒙, 骆永全, 张大勇, 等. 基于液晶光调制器的激光相干合成主动相位控制[J]. 中国激光, 2010, 37(7): 1713-1716. HUANG Zhi-meng, LUO Yong-quan, ZHANG Da-yong, et al. Active phase control in laser coherent combination based on liquid crystal optical modulator[J]. Chinese J Lasers, 2010, 37(7): 1713-1716. |
| [9] | 黄智蒙, 唐选, 刘仓理, 等. 变增益随机并行梯度下降算法及其在相干合成中的应用[J]. 中国激光, 2015, 42(4): 0402004-1-0402004-11. HUANG Zhi-meng, TANG Xuan, LIU Cang-li, et al. Stochastic parallel gradient descent algorithm with a variable gain coefficient and its application in coherent beam combining[J]. Chinese J Lasers, 2015, 42(4): 0402004-1-0402004-11. |
| [10] | JOLIVET V, BOURDON P, BENNAI B, et al. Beam shaping of single-mode and multimode fiber amplifiers array for propagation through atmosphere turbulence[J]. IEEE J Sel Top Quantum Electron, 2009, 15(2): 257-268. |
| [11] | HUANG Zhi-meng, TANG Xuan, WANG Xiao-jun, et al. Phase locking of slab laser amplifiers via square wave dithering algorithm[J]. Appl Opt, 2014, 53(10): 2163-2169. |
| [12] | VORONTSOV M A, WEYEAUCH T, BERESNEV L A, et al. Adaptive array of phase-locked fiber collimators: Analysis and experimental demonstration[J]. IEEE J Sel Top Quantum Electron, 2009, 15(2): 269-280. |
| [13] | HUANG Zhi-meng, ZHANG Da-yong, LUO Yong-quan, et al. A new configuration for phase control in laser coherent combination utilizing liquid crystal optical modulator[J]. Appl Phys B, 2010, 101(3): 559-563. |
