中国激光, 2018, 45 (7): 0701001, 网络出版: 2018-09-11 复制并引用该论文  本文已被引 5 次  被引通知

图 & 表

图 1. 实验装置示意图

Fig. 1. Schematic of the experimental device

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图 2. 掺铒脉冲振荡器的(a)光谱和(b)自相关图像

Fig. 2. (a) Optical spectrum and (b) autocorrelation image of erbium doped pulse oscillators

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图 3. (a)经过放大压缩后脉冲的光谱;(b)压缩前自相关图像;(c)光束质量M2曲线;(d)压缩后自相关图像

Fig. 3. (a) Optical spectrum of amplified pulse after compression; (b) autocorrelation image of amplified pulse before compression; (c) beam quality M2 curve; (d) autocorrelation image after compression

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图 4. 不同厚度PPLN晶体的自相关图像。(a) 0.5 mm非啁啾PPLN晶体;(b) 1 mm非啁啾PPLN晶体;(c) 10 mm啁啾PPLN晶体

Fig. 4. Autocorrelation images of PPLN crystals with different thicknesses. (a) 0.5 mm un-chirped PPLN crystal; (b) 1 mm un-chirped PPLN crystal; (c) 10 mm chirped PPLN crystal

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图 5. 不同厚度晶体的倍频光谱对比

Fig. 5. SHG optical spectra of PPLNs with different thicknesses

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表 1不同厚度PPLN晶体对780~1560 nm过程倍频效果的影响

Table1. Influence of PPLN crystal thickness on SHG from 780 nm to 1560 nm

Style ofPPLN Thicknessof PPLNd /mm Power ofseedpulse /mW Power of amplifiedpulse beforecompression /mW Power of amplifiedpulse aftercompression /mW Power ofsecond-harmonicpulse /mW Energyconversionefficiency /% Pulse widthof second-harmonicpulse /fs Un-chirped 0.5 88.2 523 424 100.4 23.7 104 Un-chirped 1 88.2 523 423 165.0 39.0 161 Chirped 10 88.2 523 424 185.5 43.7 305

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表 2不同厚度晶体倍频光的光谱宽度、频谱宽度和脉冲宽度的对比

Table2. Comparison of spectrum bandwidth, frequency bandwidth and pulse width with different thicknesses PPLNs

Parameter Value Un-chirpedd=0.5 mm Un-chirpedd=1 mm Chirpedd=10 mm Spectrum bandwidthΔλ /nm 10.5 6.4 2.6 Frequency bandwidthΔν /(1012 Hz) 5.174 3.154 1.259 Pulse width by Gaussianfitting Δτ1 /fs 85.2 140 350 Pulse width byexperiment Δτ2 /fs 104 161 305

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吴嘉瑞, 吕志强, 陆星, 刘关玉, 施可彬. 基于准相位匹配的掺铒飞秒光纤激光器倍频特性研究[J]. 中国激光, 2018, 45(7): 0701001. Jiarui Wu, Zhiqiang Lü, Xing Lu, Guanyu Liu, Kebin Shi. Characteristics of Second Harmonic Generation in Erbium Doped Femtosecond Fiber Lasers Based on Quasi Phase Matching[J]. Chinese Journal of Lasers, 2018, 45(7): 0701001.