| 基于随机并行梯度下降算法的多波长激光相干合成 |
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| 引用本文： | 王小林,周朴,马阎星,马浩统,许晓军,刘泽金,赵伊君.基于随机并行梯度下降算法的多波长激光相干合成[J].物理学报,2010,59(8):5474-5478. |
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| 作者姓名： | 王小林 周朴 马阎星 马浩统 许晓军 刘泽金 赵伊君 |
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| 作者单位： | 国防科学技术大学光电科学与工程学院,长沙 410073 |
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| 基金项目： | 国防科技大学优秀研究生创新项目(批准号:B080702)资助的课题. |
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| 摘 要： | 由于受到受激布里渊散射(SBS)等非线性效应的限制,单频激光放大器的功率在百瓦量级,以非单频激光多波长激光作为种子源能够有效地抑制SBS并提高放大器功率.与单频激光相干合成相比,非单频率、多波长激光的相干合成有望将输出激光功率成量级地提高.基于随机并行梯度下降(stochastic parallel gradient descent,SPGD)算法,实现了四波长激光的相干合成.在系统闭环时,四路多波长激光合成后的主瓣能量能够提高3倍,达到理想值的75%.验证了多波长、非单频激光相干合成的可行性,为高功率相干合成的发展提供了新的途径.
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| 关 键 词： | 光纤激光 相干合成 多波长 非单频激光 |
| 收稿时间： | 2009-10-23 |
Coherent beam combining of multi-wavelength lasers based on stochastic parallel gradient descent algorithm |
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| Wang Xiao-Lin,Zhou Pu,Ma Yan-Xing,Ma Hao-Tong,Xu Xiao-Jun,Liu Ze-Jin,Zhao Yi-Jun.Coherent beam combining of multi-wavelength lasers based on stochastic parallel gradient descent algorithm[J].Acta Physica Sinica,2010,59(8):5474-5478. |
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| Authors: | Wang Xiao-Lin Zhou Pu Ma Yan-Xing Ma Hao-Tong Xu Xiao-Jun Liu Ze-Jin Zhao Yi-Jun |
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| Institution: | College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China;College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China;College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China;College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China;College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China;College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China;College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China |
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| Abstract: | Owing to the restriction of the stimulated Brillouin scattering (SBS) and other nonlinear effects, the output power of the single frequency amplifier is ar a level of about hundred watts. Multi-wavelength and non-single frequency seed laser will mitigate the SBS and improve the output power of the fiber laser amplifier. The coherent beam combining of the non-single frequency and/or multi-wavelength laser will greatly increase the total output power of the coherent beam combining as compared with the coherent beam combining of a single frequency laser. Based on the stochastic parallel gradient descent (SPGD) algorithm, coherent combining of four channel four-wavelength lasers is realized. In the close loop state, the mean power of the main-lobe is four times higher than that of the open-loop, approaching 75% of its ideal value. The coherent combining of the multi-wavelength and non-single frequency laser is demonstrated and an approach to the high power coherent beam combining is provided. |
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| Keywords: | fiber laser coherent beam combining multi-wavelength non-single frequency laser |
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