排序方式: 共有14条查询结果,搜索用时 31 毫秒
1.
2.
3.
Dependence of the ^85Rb coherent population trapping resonance characteristic on the pressure of N2 buffer gas 下载免费PDF全文
In order to exploit its potential applications, we experimentally study the dependence of ^85 Rb-based coherent population trapping (CPTi resonance on N2 buffer gas with 6 vapor cells filled with natural rubidium and N2. The experiments are carried out at different pressures and temperatures, and the results reveal that higher cell temperature makes the resonance more sensitive to N2 pressure. Thus, it is importmlt to choose a proper buffer gas pressure at a given cell temperature. This work provides valuable data for the application of 85Rb CPT resonance with a buffer gas of N2. 相似文献
4.
介绍了交叉电磁场中原子物理问题的研究意义及所涉及的几个重要物理问题,讨论了开展该研究遇到的困难,综述了该课题的研究进展. 相似文献
5.
6.
This paper studies a miniature low power consumption laser-pumped atom
vapour cell clock scheme. Pumping 87Rb with a vertical cavity
surface emitting laser diode pump and locking the laser frequency on
a Doppler-broadened spectral line, it records a 5× 10-11τ-1/2 (τ <500~s) frequency stability with a
table-top system in a primary experiment. The study reveals that the
evaluated scheme is at the level of 2.7 watts power consumption,
90~cm3 volume and 10-12τ -1/2 short-term
frequency stability. 相似文献
7.
Coherent population trapping magnetometer by differential detecting magneto–optic rotation effect 下载免费PDF全文
A pocket coherent population trapping(CPT) atomic magnetometer scheme that uses a vertical cavity surface emitting laser as a light source is proposed and experimentally investigated.Using the differential detecting magneto–optic rotation effect,a CPT spectrum with the background canceled and a high signal-to-noise ratio is obtained.The experimental results reveal that the sensitivity of the proposed scheme can be improved by half an order,and the ability to detect weak magnetic fields is extended one-fold.Therefore,the proposed scheme is suited to realize a pocket-size CPT magnetometer. 相似文献
8.
目前的相干布居囚禁(CPT)原子钟和CPT磁场计中普遍采用圆偏振光方案 (σ+-σ+)实现CPT共振, 该方案对原子的利用率较低. 为了提高原子的利用率, 本文实验研究了通过平行线偏振相干双色光与87Rb原子作用实现CPT共振的方案(lin//lin). 与σ+-σ+方案相比较, lin//lin方案消除了极化暗态, 获得更多工作原子. 在相同的实验条件下, 开展对比实验研究获得了信噪比为σ+-σ+方案2倍, 微分线型信号的中心斜率为σ+-σ+方案1.65倍的CPT共振信号. 研究结果表明该方案是实现低功耗原子钟、磁场计等设备的理想候选. 相似文献
9.
报道了自行研制的894 nm高温垂直腔面发射激光器(VCSEL)以及基于此类器件的芯片级铯原子钟系统的应用实验结果.根据芯片级铯原子钟对VCSEL在特定高温环境下产生894.6 nm线偏振激光的要求,对器件的量子阱增益及腔模位置等材料结构参数进行了优化,确定增益-腔模失谐量为-15 nm,使器件的基本性能在高温环境下保持稳定.研制的VCSEL器件指标为:20—90?C温度范围内阈值电流保持在0.20—0.23 m A,0.5 m A工作电流下输出功率0.1 mW;85.6?C温度环境下激光波长894.6 nm,偏振选择比59.8:1;采用所研制的VCSEL与铯原子作用,获得了芯片级铯原子钟实施激光频率稳频的吸收谱线和实施微波频率稳频的相干布居囚禁谱线. 相似文献
10.