Experiment device of coherent population trap Rb atom clock

The space atomic clock is widely used in different application fields such as navigation satellite system, deep-space application, ocean surveillance, satellite gravity measurement. In order to solve the main problems limiting the stability of the traditional space rubidium atomic clock, two new types of space atomic clock, CPT (coherent population trapping) maser and POP(pulsed optically pumped) maser, are under development in the National Time Service Center. The CPT maser RF spectrum and POP free-induced decay signal, the symbolic signals of CPT and POP, were the second such type after the Italian INRIM in China. Now the locking and optimization of these two clock systems are going on. The lowphase noise synthesis chain is one of the best in the world. New type extended cavity diode laser is applying for patent of invention.