掺铒纳米晶与聚合物键合比例对光波导放大器增益性质的影响

编号：CYYJ03450

篇名：掺铒纳米晶与聚合物键合比例对光波导放大器增益性质的影响

作者：唐迎 李俊 符越吾 赵丹 秦伟平

关键词： 掺铒纳米晶 复合聚合物 键合比例 光波导放大器

机构： 吉林大学电子科学与工程学院集成光电子学国家重点实验室

摘要： The nanocomposite,which is synthesized by copolymerizing erbium-doped nanocrystals and methyl methacrylate(MMA)monomer,can be used as the gain media to fabricate a polymer-based optical waveguide amplifier.The gain performance of this type device is closely related to the concentration of nanocrystals in the nanocomposite.In this paper,the uniform β-NaLu50%Y30%F4∶18%Yb3+,2%Er3+nanocrystals were successfully synthesized by the thermal decomposition method.The nanocrystals were about 16 nm and modified with unsaturated ligands on their surfaces.Therefore,the nanocrystals could be copolymerized with MMA to form nanoparticles-polymethyl methacrylate(NPs-PMMA)nanocomposite.Three groups of nanocomposites with different bonding ratios were prepared by adjusting the doping concentrations of nanoparticles to 0.1,0.15,0.25 mmol,respectively.The down-conversion emission and transmission spectra showed that with the increase of the bonding nanocrystal concentration,the luminescence intensity of the nanocomposites increased gradually,but the light transmittance in the near infrared region decreased slightly.A series of embedded waveguide amplifiers were fabricated based on these three nanocomposites.At 1550 nm,the relative gains of these devices were 3.00,3.46,5.61 dB,and the insertion losses were 19.20,25.00,26.53 dB,respectively.The results showed that even the scattering loss raised with the increase of nanocrystal concentration,the luminescence intensity of the gain media still enhanced and the relative gain improved in the series of devices in the C-band.In the experiment of this paper,increasing the concentration of the nanocrystals results in an advantage of the gain improvement over the scattering loss increase.