Enhancing environmental stability of a PbS quantum dot optical fiber amplifier via rational interface design
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A PbS quantum dot optical fiber amplifier with enhanced processability and environmental stability is described. Modification of PbS quantum dots with multifunction copolymers was demonstrated via spectroscopy to aid dispersion of the quantum dots in a sol during the fabrication of a quantum dot optical fiber amplifier without degradation or modification of optical properties. The influence of multifunction copolymers and oleylamine-coated PbS quantum dots on the structure was studied via scanning electron microscopy. The nanoparticle shape of oleylamine-coated PbS quantum dots after polymer modification remained unchanged compared to those previously reported. With the addition of a fluorine-containing component, a PbS quantum dot optical fiber amplifier retained 96% of its initial gain after 100 days, as compared with 16% for quantum dots modified with a non-fluorine-containing polymer, it was certain that fluorine bond of multifunction copolymers had a good improvement in durability of PbS quantum dot. Simultaneously, PbS quantum dot optical amplifier gain as high as 17 dB was achieved at 1550 nm.
KeywordsQuantum dot Fiber amplifier Multifunction copolymers Fluorine-containing polymer Environmental stability
The work was funded by the National Natural Science Foundation of China (61377040, 61605107), Young Eastern Scholar Program at Shanghai Institutions of Higher Learning (QD2015027), “Young 1000 Talent Plan” Program of China and the Open Program of the State Key Laboratory of Advanced Optical Communication Systems and Networks at Shanghai Jiaotong University, China (2017GZKF17).
- Crisp, R.W., Pach, G.F., Kurley, J.M., France, R.M., Reese, M.O., Nanayakkara, S.U., Bradley, A.M., Dmitri, V.T., Matthew, C.B., Luther, J.M.: Tandem solar cells from solution-processed CdTe and PbS quantum dots using a ZnTe–ZnO tunnel junction. Nano Lett. 17(2), 1020–1027 (2017)ADSCrossRefGoogle Scholar
- Kawanishi, S., Komukai, T., Ohmori, M., Sakaki, H.: Photoluminescence of semiconductor nanocrystal quantum dots at 1550 nm wavelength in the core of photonic bandgap fiber. In: 2007 Conference on Lasers and Electro-Optics, 2007. CLEO 2007, pp. 1–2. IEEE (2007)Google Scholar
- Watekar, P. R., Lin, A., Ju, S., Han, W. T.: 1537 nm emission upon 980 nm pumping in PbSe quantum dots doped optical fiber. In: 2008 Conference on Optical Fiber communication/National Fiber Optic Engineers Conference, 2008. OFC/NFOEC 2008, pp. 1–3. IEEE (2008)Google Scholar