The intrinsic transverse relaxation mechanisms of polarized alkali atoms enclosed in the radio-frequency magnetometer cell are investigated.The intrinsic transverse relaxation rate of cesium atoms as a function of cel...The intrinsic transverse relaxation mechanisms of polarized alkali atoms enclosed in the radio-frequency magnetometer cell are investigated.The intrinsic transverse relaxation rate of cesium atoms as a function of cell temperature is obtained.The absorption of alkali atoms by the glass wall and the reservoir effect are the main error factors which contribute to the disagreements between theory and experiments.A modified relaxation model is presented, in which both the absorption of alkali atoms by the glass wall and the reservoir effect are included.This study provides a more accurate description of the intrinsic transverse relaxation mechanisms of polarized alkali atoms, and enlightens the optimization of the cell design.展开更多
针对自主研制的Y型腔正交偏振He-Ne双频激光器,利用Lamb半经典理论分析抽运电流、工作点和谐振腔损耗等因素对闭锁阈值频差的影响规律。搭建了Y型腔正交偏振双频激光器闭锁阈值频差测量系统,从实验上开展对双频激光器闭锁阈值频差影响...针对自主研制的Y型腔正交偏振He-Ne双频激光器,利用Lamb半经典理论分析抽运电流、工作点和谐振腔损耗等因素对闭锁阈值频差的影响规律。搭建了Y型腔正交偏振双频激光器闭锁阈值频差测量系统,从实验上开展对双频激光器闭锁阈值频差影响因素研究。通过改变抽运电流值和公共腔镜上压电陶瓷电压研究抽运电流和工作点对激光器闭锁阈值频差影响。实验结果表明,激光器闭锁阈值频差随抽运电流值增加而减小,工作点越靠近增益曲线中心,激光器闭锁阈值频差越小。当激光器抽运电流值大于2.2 m A时,调节公共腔压电陶瓷电压至最佳工作点处,激光器闭锁阈值频差可降至几兆赫兹甚至更低。展开更多
We report experimental progress in weakening the frequency difference lock-in phenomenon in a Y-shaped cavity dual-frequency laser. A cube coil pair is chosen to provide a uniform magnetic field for tunability and uni...We report experimental progress in weakening the frequency difference lock-in phenomenon in a Y-shaped cavity dual-frequency laser. A cube coil pair is chosen to provide a uniform magnetic field for tunability and uniformity of magnetic field strength. When the transverse magnetic field intensity is 9 m T, the frequency difference lock-in phenomenon is evidently weakened and the frequency difference can be continuously tuned in the range of0.12 MHz to 1.15 GHz. Moreover, the relationship between the minimal frequency difference and magnetic field intensity are investigated and discussed. Then a Y-shaped cavity dual-frequency laser is expected to be utilized as an optimum light source for heterodyne interferometric sensing and precise laser measurement.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant No.61475192)
文摘The intrinsic transverse relaxation mechanisms of polarized alkali atoms enclosed in the radio-frequency magnetometer cell are investigated.The intrinsic transverse relaxation rate of cesium atoms as a function of cell temperature is obtained.The absorption of alkali atoms by the glass wall and the reservoir effect are the main error factors which contribute to the disagreements between theory and experiments.A modified relaxation model is presented, in which both the absorption of alkali atoms by the glass wall and the reservoir effect are included.This study provides a more accurate description of the intrinsic transverse relaxation mechanisms of polarized alkali atoms, and enlightens the optimization of the cell design.
文摘针对自主研制的Y型腔正交偏振He-Ne双频激光器,利用Lamb半经典理论分析抽运电流、工作点和谐振腔损耗等因素对闭锁阈值频差的影响规律。搭建了Y型腔正交偏振双频激光器闭锁阈值频差测量系统,从实验上开展对双频激光器闭锁阈值频差影响因素研究。通过改变抽运电流值和公共腔镜上压电陶瓷电压研究抽运电流和工作点对激光器闭锁阈值频差影响。实验结果表明,激光器闭锁阈值频差随抽运电流值增加而减小,工作点越靠近增益曲线中心,激光器闭锁阈值频差越小。当激光器抽运电流值大于2.2 m A时,调节公共腔压电陶瓷电压至最佳工作点处,激光器闭锁阈值频差可降至几兆赫兹甚至更低。
基金supported by the National Natural Science Foundation of China under Grant No.61308058
文摘We report experimental progress in weakening the frequency difference lock-in phenomenon in a Y-shaped cavity dual-frequency laser. A cube coil pair is chosen to provide a uniform magnetic field for tunability and uniformity of magnetic field strength. When the transverse magnetic field intensity is 9 m T, the frequency difference lock-in phenomenon is evidently weakened and the frequency difference can be continuously tuned in the range of0.12 MHz to 1.15 GHz. Moreover, the relationship between the minimal frequency difference and magnetic field intensity are investigated and discussed. Then a Y-shaped cavity dual-frequency laser is expected to be utilized as an optimum light source for heterodyne interferometric sensing and precise laser measurement.
