1中国科学院上海光学精密机械研究所高功率激光单元技术实验室，上海 201800
中国激光
2023, 50(17): 1716001
1 中国科学院上海光学精密机械研究所高功率激光单元研发中心, 上海 201800
2 中国科学院大学, 北京 100049
研究了掺钕磷酸盐激光玻璃主要组成元素在短期水解过程中各自水解浓度的变化，特别是探索了表面结构的光电子能谱表征。作为主要形成体的磷元素，与其他主要修饰体锂、钾、钡等元素类似，具有同样量级的水解速率和逐渐趋于饱和的水解规律。而可能作为形成体和/或修饰体的铝元素，无论是玻璃体还是粉体的表面水解，均表现出一定程度的非单调性质。根据水解后光电子能谱的测定，铝的结合能峰反映出它是同时作为形成体和修饰体存在于掺钕磷酸盐激光玻璃中，并且在短期水解过程中形成体的铝将转变为修饰体的铝。这个结构特点很可能与铝所表现出来的非单调水解性质有关，并且可能是加入氧化铝能够增强磷酸盐玻璃耐水性的一个主要原因。
材料 掺钕磷酸盐激光玻璃 光电子能谱 水解
中国科学院上海光学精密机械研究所激光玻璃研发中心, 上海 201800
报道了磷酸盐激光钕玻璃的连续熔炼线，以及采用连续熔炼工艺获得的400 mm 口径N31 钕玻璃的主要性能。连熔所制备的N31-35 钕玻璃的掺杂离子浓度为3.47(±0.02)×1020 cm-3；1053 nm 处的折射率为1.5336±0.0005；400 nm 处的吸收系数平均值为0.098 cm-1；1053 nm 处的激光波长损耗为0.13~0.15% cm-1；3000 cm-1 处的吸收系数平均值为0.83 cm-1。400 mm 口径连熔N31 钕玻璃的透射波前畸变在633 nm 处小于λ/3 波长。采用1053 nm、脉冲为3 ns激光作用下连熔钕玻璃的体破坏阈值大于40 J/cm2。结果表明，在N31 钕玻璃的连续熔炼工艺中，除铂金和除水都取得了很好的效果。
光学制造 激光钕玻璃 连续熔炼工艺 损耗 增益系数
Author Affiliations
Abstract
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
Large aperture Nd:phosphate laser glass is a key optical element for an inertial confinement fusion (ICF) facility. N31, one type of neodymium doped phosphate glasses, was developed for high peak power laser facility applications in China. The composition and main properties of N31 glass are given, together with those of LHG-8, LG-770, and KGSS- 0180 Nd:phosphate laser glasses, from Hoya and Schott, and from Russia. The technologies of pot melting, continuous melting, and edge cladding of large size N31 phosphate laser glass are briefly described. The small signal gain profiles of N31 glass slabs from both pot melting and continuous melting at various values of the pumping energy of the xenon lamp are presented. N31 glass is characterized by a stimulated emission cross section of 3:8 10??20 cm2 at 1053 nm, an absorption coefficient of 0.10–0.15% cm??1 at laser wavelength, small residual stress around the interface between the cladding glass and the laser glass, optical homogeneity of 2 10??6 in a 400 mm aperture, and laser damage threshold larger than 42 J/cm2 for a 3 ns pulse width at 1064 nm wavelength.
neodymium phosphate laser glass large aperture glass ICF facility High Power Laser Science and Engineering
2014, 2(1): 010000e1
Author Affiliations
Abstract
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
Energy storage and heat deposition in Cr,Yb,Er co-doped phosphate glass were reported. A model based on rate equations was used to determine the energy storage from the free-oscillating output energy characteristics. The heat deposition was calculated by measuring the temperature rise of the glass rod. The results provided important information for the glass operating in Q-switched mode, and also for calculating the temperature profiles and cooling requirements of the glass under single shot and repetitive pulsed conditions.
350.6830 Thermal lensing 140.6810 Thermal effects Chinese Optics Letters
2006, 4(6): 345
Author Affiliations
Abstract
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
The optical loss coefficient at 1053-nm wavelength, influenced by Fe ions in N31-type Nd-doped phosphate laser glass, was determined precisely and analyzed in detail. It is found that the optical loss coefficient per unit of Fe concentration (cm^(-1)/ppmw) increases with Fe concentration in the range of 0---300 ppmw, but it approaches a constant as the Fe concentration is larger than 300 ppmw. Such a concentration effect is due to a shift in the redox equilibrium between Fe3+ and Fe2+ ions in the glass. The effect of oxygen pressure, temperature, and variable valence states of other metal ions in glass samples on the optical loss is also discussed.
160.2750 glass and other amorphous materials 160.6990 transition metal-doped materials 300.1030 absorption 140.3530 lasers neodymium Chinese Optics Letters
2005, 3(12): 12701
