Hamming切趾技术提高体光栅光谱合成功率的研究

白慧君; 汪岳峰; 王军阵; 殷智勇; 雷呈强

Hamming切趾技术提高体光栅光谱合成功率的研究

1.
军械工程学院电子与光学工程系,河北石家庄 050003

详细信息

通讯作者:
白慧君（1986-），男，甘肃民勤人，硕士研究生，主要从事激光合成方面的研究工作。 Email: bhj06@sina.com

中图分类号: TN24； O438.1
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出版历程
- 刊出日期: 2013-03-15

Using Hamming apodization technique to improve spectral beam combining efficiency of volume Bragg grating

1.
Department of Optics and Electronics Engineering,Ordnance Engineering College,Shijiazhuang 050003,China

摘要

摘要: 体光栅光谱合成技术是获得高功率激光输出的一种有效途径，体光栅衍射旁瓣是影响合成光束数目的主要因素。采用了Hamming切趾技术对体光栅旁瓣进行抑制，建立了Hamming切趾体光栅的折射率分布模型，分析了Hamming切趾体光栅的衍射特性，给出了Hamming切趾体光栅光谱合成效率公式，分析了切趾光栅对光谱合成效率的影响。计算结果表明：体光栅切趾后有效减小了体光栅对相邻合成光束的衍射损耗，切趾后，在20 nm的带宽内，谱合成光束的数目由13束增加为20束，谱合成效率达75.3%，光谱合成功率提高为切趾前的1.5倍。
- 光栅 /
- 谱合成 /
- Hamming切趾 /
- 衍射效率 /
- 谱合成效率
Abstract: Spectral beam combining technology of volume Bragg grating is an effective approach to obtain high-power laser output. The side lobe of output spectrum of volume Bragg grating is the main factor which limits the number of spectral beam combining. In this paper, the side lobe of volume Bragg grating was suppressed using Hamming apodization. The theoretical model of the refractive index of the one-dimensional apodized Bragg grating was built, and the diffraction characteristic of the Hamming apodized Bragg grating was analyzed, and the combining efficiency equation of the Hamming apodized Bragg grating was provided. Then the effect of apodized grating on the combining efficiency was analyzed. Numerical analysis shows that the side lobe in diffraction efficiency is suppressed well by using the Hamming apodization. The number of beam in spectral beam combining is increased from 13 to 20 in a total 20 nm bandwidth, and the combining efficiency can reach 75.3% after using Hamming apodized grating, while the output power is 1.5 times of the notapodized output power.
- grating /
- spectral beam combining /
- Hamming apodization /
- diffractive efficiency /
- spectrum combining efficiency

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参考文献(1)

［1］CIAPURIN I V, GLEBOV L B, SMIRNOV V. Spectral combining of high-power fiber laser beams using Bragg grating in PTR glass［J］. SPIE, 2004, 5335: 116-124.
［2］GLEBOV L B. High brightness laser design based on volume Bragg gratings［J］. SPIE, 2006, 6216: 1-11.
［3］ANDRUSYAK O, SMIRNOV V, VENUS G, et al. Beam combining of lasers with high spectral density using volume Bragg gratings［J］. Optics Communications, 2009, 282(13): 2560-2563.
［4］ZHAN S B, ZHAO S H, CHU X C, et al. Spectral beam combining of fiber lasers based on a transmitting volume Bragg gratings［J］. Optics & Laser Technology, 2010, 42(2): 308-312.
［5］沈本剑，郑光威，谭吉春，等. Sinc切趾反射体布拉格光栅衍射特性分析［J］. 中国激光, 2011, 38(9): 18-24.
SHEN Ben-jian, ZHENG Guang-wei, TAN Ji-chun, et al. Diffraction characteristic analysis of Sinc-apodized reflective volume Bragg grating［J］. Chinese Journal of Lasers, 2011, 38(9): 18-24. (in Chinese with an English abstract)
［6］SHEN Ben-jian, TAN Ji-chun, ZHENG Guang-wei, et al. Channel spectral separation narrowing for spectral beam combining by apodisation of the reflecting volume Bragg grating［J］. Defence Science Journal, 2011, 61(3): 201-205.
［7］王琳，延凤平，李一凡，等. 非对称切趾对啁啾光纤光栅特性优化的分析［J］. 光学学报, 2007, 27(4): 587-592.
WANG Lin, YAN Feng-ping, LI Yi-fan, et al. Optimization of chirped fiber Bragg gratings by a symmetrically apodization method［J］. Acta Optica Sinica, 2007, 27(4): 587-592. (in Chinese with an English abstract)
［8］黄雯，韩一石，何赛灵. 光纤光栅最佳切趾函数的研究［J］. 光电子·激光, 2002, 13(12): 1248-1251.
HUANG Wen, HAN Yi-shi, HE Sai-ling. A study on the optimal aperdization function for a fiber Bragg grating［J］. Journal of Optoelectronics · Laser, 2002, 13(12): 1248-1251. (in Chinese with an English abstract)
［9］CIAPURIN I V, GLEBOV L B, SMIRNOV V I. Modeling of Gaussian beam diffraction on volume Bragg gratings in PTR glass［J］. SPIE, 2005, 5742: 183-193.
［10］SEVIAN A, ANDRUSYAK O, CIAPURIN I, et al. Ultimate efficiency of multi-channel spectral beam combiners by means of volume Bragg gratings［J］. SPIE, 2007, 6453: 1-8.

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