Fig. 1. Electromagnetically induced transparency and the AT splitting related energy levels of cesium atoms

Fig. 2. Electromagnetically induced transparency spectrum of cesium atoms in 61D_5/2 state

Fig. 3. AT splitting spectrum of Cs 61D_5/2-62P_3/2 transition

Fig. 4. AT splitting spectrum under different microwave amplitudes

Fig. 5. AT splitting spectrum of cesium atoms 66D_5/2-67P_3/2 transition under frequency detuning condition

Fig. 6. Experimental determination of the cesium atoms 66D_5/2-67P_3/2 transition

Fig. 7. Basic principle of modulation transfer frequency stabilization method

Fig. 8. Basic principle of electromagnetically induced transparency frequency stabilization method

Fig. 9. Beatnote of two 852 nm lasers which are frequency stabilized by modulated transfer method

Fig. 10. Integrated laser module for laser frequency stabilization and laser light distribution

Fig. 11. Fiber-coupled atomic microwave electric field probe

Fig. 12. Transportable Rydberg atomic microwave electrometry

Fig. 13. Software for the automatic data recording and processing

Fig. 14. Relationship between electric field amplitude obtained from cesium atom calculation and power of different signal generators at 2.628 GHz

Fig. 15. Microwave phase measurement based on the portable systems

Fig. 16. Detection of the weak microwave signal