基于菲涅耳二元相位整形的啁啾脉冲压缩  

Chirped Pulse Compression Based on Fresnel-Inspired Binary Phase Shaping

作　　者：李百宏[1,2] 夏志广 赵鹏达 项晓[2] 董瑞芳[2] 张涛[2] Li Baihong;Xia Zhiguang;Zhao Pengda;Xiang Xiao;Dong Ruifang;Zhang Tao(College of Sciences,Xi'an University of Science and Technology,Xi'an,Shaanxi 710054,China;Key Laboratory of Time and Frequency Primary Standards,National Time Service Center,Chinese Academy of Sciences,Xi'an,Shaanxi 710600,China)

机构地区：[1]西安科技大学理学院,陕西西安710054 [2]中国科学院国家授时中心中国科学院时间频率基准重点实验室,陕西西安710600

出　　处：《激光与光电子学进展》2020年第19期310-315,共6页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(12074309,11504292,11974275);陕西省科技计划(2019TD-026);陕西省自然科学基础研究计划(2019JM-346,2016JQ1036);西安科技大学优秀青年科技基金(2019YQ2-13)。

摘　　要：相位补偿是脉冲压缩和产生超短激光脉冲的关键技术之一。首先通过类比菲涅耳波带片在空间中的相位函数,理论上证明菲涅耳二元相位整形方案可以实现类似透镜的功能,可以在频域中引入负二次光谱相位(负色散)。然后利用所提方案补偿啁啾脉冲的色散,从而将其变为变换受限脉冲,使其脉宽压缩到变换受限的时间宽度。所提方案仅与二次相位有关,不依赖于光谱振幅,因此对具有对称性分布的各种脉冲形状均适用。最后给出常见的高斯脉冲与方波脉冲的数值计算结果,在理论上验证所提方案的正确性。所提方案为啁啾脉冲压缩提供一种新的思路和方法,并可以拓展到有关色散补偿的其他领域中。Phase compensation is one of the key technologies for pulse compression and ultrashort laser pulse generation.First,we use the phase function of the Fresnel binary phase shaping scheme can achieve a lens-like function,and can introduce a negative secondary spectral phase(negative dispersion)in the frequency domain.Then,the proposed scheme is used to compensate the dispersion of the chirped pulse,thereby turning it into a transformed-limited pulse,and its pulse width is compressed to the time width of the transformed-limited.The proposed scheme is only related to the quadratic phase and does not depend on the spectral amplitude,so it is applicable to various pulse shapes with symmetrical distribution.Finally,the numerical calculation results of common Gaussian pulse and square-wave pulse are given to verify the correctness of the proposed scheme in theory.The proposed scheme provides a new idea and method for chirped pulse compression,and can be extended to other fields related to dispersion compensation.

关 键 词：超快光学 脉冲压缩 二元相位整形 菲涅耳波带片 负色散 相位补偿 

分 类 号：O437[机械工程—光学工程]