Author Affiliations
Abstract
1 Laboratory of Micro-Nano Optoelectronic Materials and Devices, Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
3 University of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai 200240, China
4 CAS Center for Excellence in Ultra-intense Laser Science (CEULS), Shanghai 201800, China
5 State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
The idea of a slot waveguide amplifier based on erbium-doped tellurite glass is first theoretically discussed in this work. Choosing the horizontal slot for low propagation loss, the TM mode profile compressed in the insertion layer was simulated, and the gain characteristics of the slot waveguide amplifier were calculated. Combining the capacity to confine light locally and the merits of tellurite glass as an emission host, this optimized amplifier shows enhanced interactions between the electric field and erbium ions and achieves a net gain of 15.21 dB for the 0.01 mW input light at 1530 nm, implying great promise of a high-performance device.
guided waves optical amplifiers rare-earth-doped materials Chinese Optics Letters
2023, 21(1): 011404
1 中国科学院上海光学精密机械研究所微纳光电子功能材料实验室, 强激光材料重点实验室, 上海 201800
2 中国科学院大学材料与光电研究中心, 北京 100049
样品温度变化会对模型预测结果产生影响, 为解决这个问题, 首先, 对同一样品不同温度下的光谱与同一样品相同温度的光谱进行了比较。 结果显示, 不同温度下的光谱差异较大。 然后研究了样品温度对玉米粗蛋白模型的预测结果的影响, 对随机选取的粗蛋白含量为6.04%的样品不同温度采集光谱, 对这些光谱进行预处理消除温度之外的因素对光谱的影响, 将预处理后的光谱代入已建立好的模型中进行预测, 结果显示, 预测结果与实测值之间的差别随着光谱温度与建模温度相之间差别的增大而增大, 最大的误差为1.12%。 为了解决温度对模型预测结果的影响, 进而分析了温度与不同温度下的光谱数据之间的关系, 发现在去除了光谱两端噪声较严重的区域后, 不同温度下, 同一波长点处的光谱数据之间存在一定的线性关系。 依据这一发现, 文中提出了温度修正理论, 以建模时的光谱为基准光谱, 然后根据温度与光谱之间的线性关系使用线性回归算法对不同波长点的光谱进行一元线性回归, 求出不同温度下的光谱与基准光谱之间的差, 最后将不同温度下的光谱校正为基准光谱, 通过该理论对光谱进行校正之后, 不同温度下的同一样品的光谱之间的差别和修正之前相比已经有了很大改善, 将修正后的光谱代入模型, 大部分预测结果得到了提高, 符合国家标准±0.5%以下的要求。 最后使用和建模无关的34个不同含量的样品对该温度修正理论进行验证, 光谱修正前后粗蛋白的模型预测值与标准理化值决定系数分别为0.910和0.982, 均方根误差分别为0.558和0.172, 平均相对误差分别为6.05%和1.75%。 该温度修正理论从近红外光谱分析的本质上进行了温度修正, 为其他样品的温度修正提供了参考, 有利于手持式近红外光谱仪使用的推广。
近红外光谱法 温度修正 线性回归 粗蛋白测量 Near-infrared spectroscopy Temperature correction Linear regression Crude protein measurement 光谱学与光谱分析
2020, 40(6): 1690
1 中国科学院 上海光学精密机械研究所, 上海 201800
2 上海恒益光学精密机械有限公司, 上海 201800
3 华中科技大学 光学与电子信息学院, 湖北 武汉 430000
针对大口径平面光学元件全频谱面形技术指标的高效率、高精度收敛, 研究了环形抛光技术。考虑环抛机沥青蜡盘的平面度直接影响工件面形的收敛效率, 本文利用准直激光束作为参考, 设计研制了测量精度高, 重复性精度达到±1 μm的大型环抛机抛光蜡盘平面度测量专用装置。分析了环抛过程中蜡盘表面平面度和工件面型PV值之间的变化规律和相关性, 根据测量数据得出了蜡盘平面度数据和工件面形的对应关系。实验显示: 当平面度和面形曲线相差较大时, 工件面形可快速收敛至1λ左右, 并由粗抛向精抛工序快速过渡。提出的大型环抛机抛光蜡盘平面度监测装置实现了对湿滑胶体平面的高精度、快速测量, 为环抛的确定性抛光工艺提供了重要的技术支持。
环形抛光 大型环抛机 抛光蜡盘 平面度测量 continuous polishing large continuous polisher pitch lap flatness measurement 光学 精密工程
2016, 24(12): 3048
1 中国科学院上海光学精密机械研究所，上海 201800
2 国家纳米科学中心，北京 100080
采用高数值孔径物镜和高准确度纳米平台搭建了一台激光直写装置，可以在光敏感薄膜材料上进行打点、刻画矢量和标量图形等多种操作，其最小特征尺寸小于300 nm，重复性5 nm.在刻写前准确标定刻写激光功率，刻写过程中采用象散法精确自动聚焦，刻写完成后采用两种不同波长的激光束探测样品的透过率和反射率的细微变化，最终实现了高准确度亚微米图形的刻写和检测.
激光直写 微纳加工 自动聚焦 功率标定 Laser direct writing Micro-nano machining Autofocus Power calibration
Author Affiliations
Abstract
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
The near-field scanning optical microscope, which is integrated with scanning probe microscope technology, has been investigated as a tool for material science, biology, photolithography, and high-density optical recording. In near-field scanning optical microscope, a sub-wavelength sized probe is used to pick up the optical properties of a sample with a resolution limited primarily by the probe size. The configuration of the tip in the application is of utmost importance to the performance of the system. The spatial resolution of near-field scanning optical microscope system is mainly determined by the aperture size of the fiber tip, and the optical transmission properties of the system are highly influenced by the cone angle of the tip as well as the tip surface quality. However, the poor reproducibility in tip fabrication and the low optical throughput are still the major technical difficulties. In this paper, a design of etching automatism for fabricating the tip of near-field scanning optical microscope is proposed. The configuration of the design is very simple and can be actualized easily. The design that considers the main factors that may affect the configuration of fiber tip, makes the experimental condition of fiber tip the same in any condition, and also allows the changes of the experimental condition for fabricating different configuration tips. Static and dynamic etchings and their combinations are studied. The etching process is optimized, and the tips with short tapers, small apertures (about 50 nm) and large aperture cone angles (40 deg.) are successfully obtained. Multiple-tapered tips are also fabricated by using different dynamic regimes. The experimental results show that the design can not only fabricate sharp fiber tips, but also fabricate different configuration fiber tips. The design makes the etching of fiber tips controllable and can satisfy different requirements.
220.0220 Optical design and fabrication 220.4000 Microstructure fabrication Chinese Optics Letters
2007, 5(s1): 232
