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塑料光纤在成本、光纤到户和短距离通信等方面与石英光纤相比具有优越性。在塑料光纤基底中掺入某些光放大介质(如量子点),可以制备出塑料光纤放大器。目前,对于量子点掺杂的塑料光纤材料的光学性能的研究还很少。报导了一种以聚甲基丙烯酸甲酯(PMMA)为基底的CdSe量子点光纤材料CdSe/PMMA。紫外-可见-近红外吸收谱以及荧光辐射谱测量表明,制备的CdSe量子点的尺寸单分散性较好,CdSe/PMMA的发射峰比CdSe的发射峰宽,其半峰全宽加宽了约10 nm。在波长为473 nm的激光持续照射下,CdSe/PMMA的荧光辐射强度不断增强,约12 h后发光强度趋稳,峰值强度增加约1倍,同时,荧光峰值波长出现蓝移,约25 nm,没有回复现象。由于CdSe/PMMA具有强荧光辐射和宽光谱的特点,因此有可能是一种较为理想的宽光谱光纤基底材料。
Plastic optical fiber has advantages over quartz optical fiber in terms of cost, FTTH and short-range communication. Plastic optical fiber substrate in the incorporation of some optical amplifier media (such as quantum dots), can be prepared plastic optical fiber amplifier. At present, there is little research on the optical properties of quantum dots doped with plastic optical fiber materials. Reported a CdSe quantum dot fiber material CdSe / PMMA based on polymethylmethacrylate (PMMA). The results of UV-Vis-NIR and fluorescence emission spectroscopy showed that the prepared CdSe QDs had better monodispersion, the emission peak of CdSe / PMMA was wider than that of CdSe, and the full width at half maximum 10 nm. At the wavelength of 473 nm, the fluorescence intensity of CdSe / PMMA increased continuously, and the luminescence intensity tended to increase after about 12 h with the peak intensity increasing about 1 time. At the same time, the fluorescence peak wavelength shifted blue-shifted by about 25 nm, No response. Due to its strong fluorescence emission and broad spectrum, CdSe / PMMA may be a better candidate for wide-band optical fiber.