摘要
内面镀有碘化银和银(AgI/Ag)的空芯光纤在中红外波段已有较成熟的制备工艺并得到广泛应用。由于AgI膜厚和表面粗糙度的控制存在较大难度,近红外低损耗的AgI/Ag空芯光纤尚未见报道。通过一系列工艺改进,包括以酒精作为碘的溶剂,在低温中对银膜进行碘化,并采用真空泵提高并稳定碘溶液流速,制备了碘化银膜厚为70nm的AgI/Ag空芯光纤。实现了AgI/Ag空芯光纤在近红外区域的低损耗传输。采用发光波长为1.064μ闾m的二极管抽运固体激光器系统测得长度为1m、内径为0.7mm的AgI/Ag空芯光纤损耗约为1.15dB/m。进一步研究了碘溶液浓度、温度等参数对碘化银膜镀膜工艺的影响,并评价了多种内径AgI/Ag空芯光纤在近红外波段的传输特性和弯曲损耗特性。
AgI/Ag hollow fibers have been fabricated and found applications in mid-infrared wavelength regions. However, it is a challenge to fabricate low-loss AgI/Ag hollow fiber in the near infrared region, because it is difficult to control the film thickness and surface roughness. Some improvements, including ethanol as the new iodine solvent, low iodination temperature, and fast flowing rate for the iodine solution with a vacuum pump, are proposed in order to coat a thin and smooth AgI film with a thickness of 70 nm. Low-loss AgI/Ag hollow fibers with various inner diameters are obtained for 1 μm wavelength band. The measured transmission loss is 1. 15 dB/m for the 1. 064 μm diode pumped solid state laser system. Fabrication parameters including iodine concentration and reaction temperature are discussed in detail. The transmission and bending loss properties of the AgI/Ag hollow fibers with various inner diameters in the near infrared region are evaluated.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2013年第3期72-76,共5页
Acta Optica Sinica
基金
国家自然科学基金(60971014)资助课题
关键词
光纤光学
光波导
近红外空芯光纤
液相镀膜法
碘化银薄膜
fiber optics
optical waveguide
near infrared hollow fiber
liquid-phase coating method
AgI film
