基于CH_(3)NH_(3)PbI_(3)/AAO可饱和吸收体的被动调Q激光器  

Passive Q-switched Laser Based on Perovskite-anodic Alumina Saturable Absorber

作　　者：郭铠旗 戴腾飞 温福兆宇 谢亮志 杨不凡 杨石琪 孔春霞[1,3] GUO Kai-qi;Dai Teng-fei;WEN Fu-zhao-yu;XIE Liang-zhi;YANG Bu-fan;YANG Shi-qi;KONG Chun-xia(School of Chemistry and Materials,Nanjing University of Information Science&Technology,Nanjing 210044,China;School of Electronic and Information Engineering,Nanjing University of Information Science&Technology,Nanjing 210044,China;Collaborative Innovation Center of Atmospheric Environment and Equipment Technology,Nanjing University of Information Science&Technology,Nanjing 210044,China)

机构地区：[1]南京信息工程大学化学与材料学院,江苏南京210044 [2]南京信息工程大学电子与信息工程学院,江苏南京210044 [3]南京信息工程大学江苏省大气环境与装备技术协同创新中心,江苏南京210044

出　　处：《量子光学学报》2023年第3期95-102,共8页Journal of Quantum Optics

基　　金：南京信息工程大学大学生创新创业训练计划项目(202210300023Z)。

摘　　要：钙钛矿材料因其具有独特的晶体结构、可调谐的直接带隙和宽带可饱和吸收等优点而成为近年来光电领域的一大热点。本文采用限域生长法制备了钙钛矿(CH_(3)NH_(3)PbI_(3))/阳极氧化铝(AAO)可饱和吸收体,AAO薄膜的存在不仅提高了CH_(3)NH_(3)PbI_(3)在空气中的稳定性,同时改善了可饱和吸收体(SA)的光学特性。CH_(3)NH_(3)PbI_(3)/AAO-SA的调制深度约为7.2%,饱和光强约为9.65 MW/cm^(2)。将CH_(3)NH_(3)PbI_(3)/AAO-SA插入Nd:YVO_(4)全固态被动调Q激光器谐振腔内,获得了稳定的1 064.07 nm波长的调Q脉冲。当抽运功率为7 W时,激光器输出脉冲的最小持续时间为约360 ns,平均输出功率为483 mW。此时脉冲的重复频率为446 kHz,射频信号的信噪比为44 dB。This study provides a novel and effective way to fabricate perovskite-based saturable absorbers with enhanced stability and optical performance for Q-switched laser applications.Perovskite materials have become a hot topic in recent years because of their unique crystal structure,tunable direct band gap and broadband saturable absorption.The purpose of this paper is to investigate the feasibility and performance of perovskite-based saturable absorbers based on anodic alumina films for Q-switched laser applications.In this paper,perovskite-based(CH_(3)NH_(3)PbI_(3))/anodic alumina(AAO) saturable absorbers were prepared by a limited domain growth method.The existence of AAO films not only improved the stability of CH_(3)NH_(3)PbI_(3)in air,but also improved the optical properties of the saturable absorbers(SA).The modulation depth of CH_(3)NH_(3)PbI_(3)AAO-SA was about 7.2%,and the saturation light intensity was about 9.65MW/cm^(2).By inserting CH_(3)NH_(3)PbI_(3)AAO-SA into the resonator of Nd:YVO_(4) all-solid-state passive Qswitched laser,a stable Q-switched pulse with a center wavelength of 1 064.07 nm was obtained.When the pumping power was 7W,the minimum duration of the laser output pulse was about 360 ns,and the average output power was 483 mW.At this time,the pulse repetition rate was 446 kHz,and the radio frequency(RF) spectrum signal-to-noise ratio(SNR) was 44 dB.Compared with previous studies,the perovskite-based saturable absorbers in this paper achieved a higher saturation intensity,a shorter pulse width and a lower SNR,demonstrating their superior performance for Q-switched laser applications.

关 键 词：钙钛矿 阳极氧化铝 被动调Q 全固态激光器 

分 类 号：TN242[电子电信—物理电子学]