基于365 nm LED泵浦的膦氧铒配合物掺杂的有机光波导放大器  

Polymer Optical Waveguide Amplifiers Doped with Phosphine Oxide Erbium Complex Based on 365 nm LED Pumping

作　　者：何岩 满意 史晓武 何清勇 许辉[2] 张丹 He Yan;Man Yi;Shi Xiaowu;He Qingyong;Xu Hui;Zhang Dan(School of Electronic Science and Engineering(National Model Microelectronics College),Xiamen University,Xiamen 361005,Fujian,China;Key Laboratory of Functional Inorganic Material Chemistry,Ministry of Education,School of Chemistry,Chemical Engineering and Materials,Heilongjiang University,Harbin 150080,Heilongjiang,China)

机构地区：[1]厦门大学电子科学与技术学院(国家示范性微电子学院),福建厦门361005 [2]黑龙江大学化学化工与材料学院功能无机材料化学教育部重点实验室,黑龙江哈尔滨150080

出　　处：《中国激光》2024年第14期127-133,共7页Chinese Journal of Lasers

基　　金：国家重点研发计划(2021YFB2800500);福建省自然科学基金(2022J01063);国家自然科学基金(61875170)。

摘　　要：以膦氧基配体4,6-双(二苯基磷酰基)二苯并呋喃(DBFDPO)和β-二酮类配体二苯并四噻吩并苯(DBTTA)分别为中性和阴离子配体,合成了铒配合物Er(DBTTA)3(DBFDPO),并将其掺杂在聚甲基丙烯酸甲酯(PMMA)中,制备了基于倏逝波放大原理的有机掺铒光波导放大器。采用一个功率为462 mW的365 nm发光二极管(LED)替代976 nm或1480 nm半导体激光器作为泵浦源,在长为0.9 cm、截面尺寸为4μm×4μm的通道波导中,实现了1550 nm波长处7.4 dB/cm的相对增益。利用廉价方便的LED泵浦实现了光波导放大器在光通信C波段的光增益,器件的商用化成本有望降低。Objective Erbium-doped waveguide amplifiers (EDWAs) applied in on-chip photon integration fields have been widely studied over the past two decades owing to their low cost,compensation for optical loss,and potential applications in integrated optical systems.Due to the limitations of traditional inorganic EDWA research methods,976 nm or 1480 nm lasers are usually chosen as pump sources to pump polymer EDWAs,which achieves a radiative transition (~4I_(13/2)→~4I_(15/2)) through the intrinsic absorption (~4I_(15/2)→~4I_(11/2 )or ~4I_(13/2)) of Er^(3+)ions.However,the intrinsic absorption cross-section of Er^(3+)ions in polymers is small,and high-power laser pumping can easily cause damage to polymer waveguides,which limits the development of polymer EDWAs.In this work,a low-power blue violet LED is used as the pump source instead of a traditional semiconductor laser.By utilizing the strong absorption performance of organic ligands in the blue violet light band and the intramolecular energy transfer mechanism between ligands and Er^(3+)ions,the efficient luminescence of Er^(3+)ions at 1550 nm is achieved.Methods Using the chelating phosphine oxide ligands DBFDPO as the neutral ligand and β-diketone ligand DBTTA as the anionic ligand,respectively,the erbium complex Er(DBTTA)_(3)(DBFDPO) is synthesized and doped into polymethylmethacrylate (PMMA) to prepare active polymer films.The absorption spectra,photoluminescence (PL) spectra,and atomic force microscope (AFM) image of the film are measured at room-temperature.A passive SU-8 channel waveguide with a cross-sectional size of 4μm×4μm is fabricated via a one-step lithography process,using a 3-μm-thick Er(DBTTA)_(3)(DBFDPO)-doped PMMA as the active top cladding to prepare a polymer optical waveguide amplifier.With the 365 nm LED vertical top-pumping method,optical gains at 1550 nm are achieved in the waveguide based on the evanescent-wave amplification principle.Results and Discussions By using a 462 mW 365 nm LED as the pump source instead of conventional 976

关 键 词：有机光波导放大器 铒配合物 1550 nm 增益 

分 类 号：TN256[电子电信—物理电子学]