论文部分内容阅读
采用飞秒激光脉冲辐照不同羟基浓度的纯石英玻璃,诱导其内部产生缺陷。系统研究了羟基浓度、激光脉宽和激光功率对缺陷类型和浓度的影响。石英玻璃的显微荧光谱、吸收谱和发射谱测试表明,飞秒激光诱导石英玻璃可以产生非桥氧空穴中心(NBOHC)、非弛豫氧空位[ODC(Ⅱ)]和E′心3种缺陷;低羟基浓度石英玻璃易产生ODC(Ⅱ)缺陷,高羟基浓度石英玻璃易产生NBOHC缺陷。用波长为254nm的紫外灯激发飞秒激光辐照后的高羟基浓度石英玻璃可观察到明显的红色荧光(波长为650nm),其发光强度与飞秒激光的脉宽和功率相关,发光强度随激光脉宽的增加先增加后减小,随激光功率的增加先增加后趋于平缓。
The use of femtosecond laser pulse irradiation of different concentrations of pure silica glass, inducing its internal defects. The effects of hydroxyl concentration, laser pulse width and laser power on the type and concentration of defects were systematically investigated. The fluorescence spectra, absorption spectra and emission spectra of quartz glass show that femtosecond laser-induced quartz glass can produce NBOHC, non-relaxation oxygen vacancies [ODC (Ⅱ)] and E ’heart 3 Kinds of defects; low concentration of hydroxyl quartz glass easy to produce defects of ODC (Ⅱ), high hydroxyl concentration of quartz glass prone to NBOHC defects. The high hydroxyl concentration after the irradiation of femtosecond laser was excited by the UV lamp with the wavelength of 254nm. The obvious red fluorescence (wavelength 650nm) was observed in the quartz glass. The luminescence intensity was related to the pulse width and power of the femtosecond laser. The luminescence intensity The increase of laser pulse width first increases and then decreases, then increases with laser power and then tends to be gentle.