飞秒激光在LiNbO<sub>3</sub>晶体上烧蚀衍射光栅

余本海; 李玉华; 戴能利; 郑启光; 陆培祥

中国激光, 2008, 35 (8): 1161, 网络出版: 2008-08-16

飞秒激光在LiNbO₃晶体上烧蚀衍射光栅

Diffraction Gratings Ablated on LiNbO3 Crystal by Femtosecond Laser Pulses

论文大纲

余本海 ^1,2,*李玉华 ²戴能利 ²郑启光 ²陆培祥 ²

作者单位

¹ 信阳师范学院物理电子工程学院, 河南信阳 464000

² 华中科技大学光电子科学与工程学院武汉光电国家实验室, 湖北武汉 430074

激光技术衍射光栅飞秒激光 LiNbO3晶体 laser technique diffraction grating femtosecond laser LiNbO3 crystal

摘要

利用脉冲宽度为50 fs,中心波长为800 nm,重复频率为1000 Hz的飞秒激光脉冲在LiNbO3晶体上烧蚀表面衍射光栅,采用632.8 nm的He-Ne激光测量不同光栅的衍射效率。在激光脉冲能量和光栅常数相同的情况下,烧蚀速率由20 μm/s增大到200 μm/s时,所加工光栅的1级衍射效率从1.7%增大到2.3%; 如果光栅常数和烧蚀速率不变,将激光脉冲能量由70 nJ增大到110 nJ,所加工光栅的1级衍射效率从1.9%减小到1.3%; 随着光栅常数的增大,在LiNbO3晶体上烧蚀光栅的各级衍射效率也随之增加。对实验结果进行理论分析表明,可以通过提高烧蚀速率、降低激光脉冲能量和增大光栅常数来提高飞秒激光加工光栅的衍射效率。

Abstract

Surface diffraction gratings are written on LiNbO3 crystal by femtosecond laser pulses with the wavelength of 800 nm, pulse duration of 50 fs and repetition frequency of 1000 Hz. The diffraction efficiencies of the gratings ablated with various parameters are measured by He-Ne laser with the wavelength of 632.8 nm. The 1-order diffraction efficiencies of the gratings improve from 1.7% to 2.3% with the increase of ablation speed from 20 μm/s to 200 μm/s, and decrease from 1.9% to 1.3% with the increase of pulse energy from 70 nJ to 110 nJ, respectively. The experimental and theoretical results show that the diffraction efficiencies of gratings can be improved by increasing ablation speed and grating constant or decreasing pulse energy.

参考文献

[1] . C. Busacca, C. L. Sones, V. Apostolopoulos et al.. Surface domain engineering in congruent lithium niobate single crystals: A route to submicron periodic poling[J]. Appl. Phys. Lett., 2002, 81(26): 4946-4948.

[2] . Eason, Alexander J. Boyland, Sakellaris Mailis et al.. Electro-optically controlled beam deflection for grazing incidence geometry on a domain-engineered interface in LiNbO3[J]. Opt. Commun., 2001, 197: 201-207.

[3] . Anisotropic properties of ultrafast laser-driven microexplosions in lithium niobate crystal[J]. Appl. Phys. Lett., 2005, 87(24): 241107.

[4] . . Efficient frequency doubling in femtosecond laser-written waveguides in lithium niobate[J]. Appl. Phys. Lett., 2006, 89(8): 081108.

[5] Qiang Wu, Jingjun Xu, Guoquan Zhang et al.. Fanning scattering in LiNbO3 at 750～850 nm induced by femtosecond laser pulses [J]. Opt. Mater., 2003, 23(1-2):277～280

[6] . Direct optical fabrication of three-dimensional photonic crystals in a high refractive index LiNbO3 crystal[J]. Opt. Lett., 2006, 31(18): 2783-2785.

[7] . Miura, Jianrong Qiu, H. Inouye et al.. Photowritten optical waveguides in various glasses with ultrashort pulse laser[J]. Appl. Phys. Lett., 1997, 71(23): 3329-3331.

[8] . Hughes, W. Yang, D. Hewak. Fabrication and characterization of femtosecond laser written waveguides in chalcogenide glass[J]. Appl. Phys. Lett., 2007, 90(13): 131113.

[9] . L. Li, D. K. Y. Low, M. K. Ho et al.. Fabrication of waveguides in foturan by femtosecond laser[J]. J. Laser Appl., 2006, 18(4): 320-324.

[10] . . Space-selective precipitation of metal nanoparticles inside glass[J]. Appl. Phys. Lett., 2002, 81(6): 3040-3042.

[11] . . Three-dimensional recording by tightly focused femtosecond pulses in LiNbO3[J]. Appl. Phys. Lett., 2006, 89(6): 062903.

[12] 邢卉,唐火红,江兵等. 聚甲基丙烯酸甲酯掺杂Ce3+的飞秒激光三维信息存储[J]. 光学学报, 2006, 26(6):874～877

Xing Hui, Tang Huohong, Jiang Bing et al.. Three-dimensional optical storage in a PMMA polymer doped with Ce3+ [J]. Acta Optica Sinica, 2006, 26(6):874～877

[13] 胡晓,赵全忠,姜雄伟等. 飞秒激光烧蚀玻璃基质金属薄膜直写衍射光栅[J]. 中国激光, 2006, 33(1):17～20

Hu Xiao, Zhao Quanzhong, Jiang Xiongwei et al.. Inscribing diffraction grating by femtosecond laser ablation of metal film on glass substrate [J]. Chinese J. Lasers, 2006, 33(1):17～20

[14] . Li, P. Lu, N. Dai et al.. Surface relief diffraction gratings written on β-BaB2O4 crystal by femtosecond pulses[J]. Appl. Phys. B, 2007, 88: 227-230.

[15] . Double-line-density gratings structure for compression and generation of double femtosecond laser pulses[J]. J. Opt. Soc. Am. B, 2007, 24(4): 979-984.

[16] Yi Dong, Xiaoqiang Yu, Yuming Sun et al.. Femtosecond laser induced index and relief gratings in polymer films [J]. Chin. Opt. Lett., 2007, 5(4):191～193

[17] . Characteristics of filament induced Dammann gratings fabricated using femtosecond laser[J]. Opt. & Laser Tech., 2007, 39: 1328-1333.

[18] . 飞秒激光烧蚀LiNbO3晶体的形貌特征与机理研究[J]. 物理学报, 2007, 56(10): 5821-5826.

. . Morphology and mechanism of femtosecond laser-induced structural changes in lithium niobate crystal[J]. Acta Physica Sinica, 2007, 56(10): 5821-5826.

[19] . 透射光栅对软X射线衍射效率的研究[J]. 物理学报, 1998, 47(4): 613-618.

. . Study of transmission grating diffraction efficiencies for soft X-rays[J]. Acta Physica Sinica, 1998, 47(4): 613-618.

余本海, 李玉华, 戴能利, 郑启光, 陆培祥. 飞秒激光在LiNbO₃晶体上烧蚀衍射光栅[J]. 中国激光, 2008, 35(8): 1161. Yu Benhai, Li Yuhua, Dai Nengli, Zheng Qiguang, Lu Peixiang. Diffraction Gratings Ablated on LiNbO3 Crystal by Femtosecond Laser Pulses[J]. Chinese Journal of Lasers, 2008, 35(8): 1161.

飞秒激光在LiNbO₃晶体上烧蚀衍射光栅

关于本站 Cookie 的使用提示

全站搜索

飞秒激光在LiNbO3晶体上烧蚀衍射光栅

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索

飞秒激光在LiNbO₃晶体上烧蚀衍射光栅