华南理工大学 发光材料与器件国家重点实验室，广东省光纤激光材料与应用技术重点实验室，广东 广州 510640
掺稀土激光玻璃是光纤激光器的核心工作介质，如何定量计算预测激光玻璃的光学光谱特性是加快高性能激光玻璃研发的挑战之一。本文以掺铥（Tm3+）二元锗酸盐激光玻璃为例，将相图中的“一致熔融化合物”视为玻璃的组成/结构“基元”，基于掺Tm3+基元玻璃的物理和光谱性质的实验值利用杠杆规则计算预测了锗酸盐激光玻璃相应的性质，如密度、折射率、有效线宽、吸收/发射截面、辐射寿命、增益带宽等。结果表明，物理性质和光谱特性的预测值与实验值吻合度较高，预测误差绝对值分别小于4.61%和9.66%。此外，该方法能够准确预测掺Tm3+锗酸盐玻璃的物理性质和光谱特性随组分的变化趋势，包括线性规律和“锗反常”现象，有助于解析激光玻璃组成?结构?性质的内在关联。本研究有望为激光玻璃的性质预测和成分设计提供指导。
激光玻璃 光谱特性 定量预测 相图模型 laser glass spectroscopic properties quantitative prediction phase diagram model
Author Affiliations
Abstract
State Key Laboratory of Quantum Optics and Quantum Optics Devices, College of Physics and Electronics Engineering, Shanxi University, Taiyuan 030006
An efficient scheme for photon statistics measurement is presented based on the Hanbury-Brown-Twiss configuration. We set the sampling time Ts to satisfy the relationship of Ts<Td<Tm, where Td is the dead time of each detector and Tm is the laser pulse repetition period. And each single photon detector cannot detect more than one photon in each pulse. The approach can sufficiently eliminate the influences of the detector’s dead time on photon statistics. At last, the photon statistics of coherent field is experimentally determined.
光子统计 死时间 同步探测 030.0030 Coherence and statistical optics 140.0140 Lasers and laser optics 270.0270 Quantum optics 030.5260 Photon counting Chinese Optics Letters
2008, 6(4): 238
