A novel setup of saturated absorption spectroscopy (SAS) is presented.It is based on laser reflections at surfaces of a sample vapor cell.It only needs one cell and one photodiode and is more compact than conventional...A novel setup of saturated absorption spectroscopy (SAS) is presented.It is based on laser reflections at surfaces of a sample vapor cell.It only needs one cell and one photodiode and is more compact than conventional setups of SAS.Its spectrum is similar to a conventional SAS.The frequency stabilization performance of an external-cavity diode laser with this setup is investigated.A frequency stability of 1.1 × 10^(-11) is achieved at an averaging time of 60s in the Allen variance measurements.展开更多
An atomic magnetometer based on optically detected magnetic resonance is investigated and demonstrated experimentally.We build an 894 nm external cavity diode laser which is frequency locked to the F=4→F'=3 trans...An atomic magnetometer based on optically detected magnetic resonance is investigated and demonstrated experimentally.We build an 894 nm external cavity diode laser which is frequency locked to the F=4→F'=3 transition of Cs D_(1) line with DAVLL spectroscopy.With the phase-locked loop,the frequency of the rf coils is actively locked to the Larmor frequency and the magnetometer tracks the magnetic field variations in a phase coherent manner.An ultimate sensitivity of 19 fT/Hz^(1/2) and an intrinsic sensitivity of 8.6 pT/Hz^(1/2) in the magnetic environment which is close to geomagnetic field have been achieved with the spatial resolution smaller than 2 cm.展开更多
基金Supported by the National Basic Research Program of China under Grant No 2012CB921602the National Natural Science Foundation of China under Grant Nos 10874012 and 10974177the Program of International Science and Technology Cooperation of China under Grant No 2010DFA04690.
文摘A novel setup of saturated absorption spectroscopy (SAS) is presented.It is based on laser reflections at surfaces of a sample vapor cell.It only needs one cell and one photodiode and is more compact than conventional setups of SAS.Its spectrum is similar to a conventional SAS.The frequency stabilization performance of an external-cavity diode laser with this setup is investigated.A frequency stability of 1.1 × 10^(-11) is achieved at an averaging time of 60s in the Allen variance measurements.
基金Supported in part by the National Basic Research Program of China under Grant No 2012CB921602the National Natural Science Foundation of China under Grant Nos 10874012,10974177the Program of International Science and Technology Cooperation of China under Grant No 2010DFA04690。
文摘An atomic magnetometer based on optically detected magnetic resonance is investigated and demonstrated experimentally.We build an 894 nm external cavity diode laser which is frequency locked to the F=4→F'=3 transition of Cs D_(1) line with DAVLL spectroscopy.With the phase-locked loop,the frequency of the rf coils is actively locked to the Larmor frequency and the magnetometer tracks the magnetic field variations in a phase coherent manner.An ultimate sensitivity of 19 fT/Hz^(1/2) and an intrinsic sensitivity of 8.6 pT/Hz^(1/2) in the magnetic environment which is close to geomagnetic field have been achieved with the spatial resolution smaller than 2 cm.
