微小型CPT原子磁力仪

Miniature CPT atomic magnetometer

针对同轴对射式相干布居俘获(CPT)原子磁力仪光纤位于探头两端,导致探头体积过大,不利于小型无人机(UAV)搭载应用的问题,设计了一种微小型CPT原子磁力仪,实现了入射与出射光纤同侧安装,解决了光纤弯折导致探头体积过大的问题。测试结果表明:微小型CPT原子磁力仪准确度优于0.24 nT,非线性度优于0.00024%,磁场跟踪能力优于375 nT/s,噪声优于15.34 pT/Hz^(1/2)@1~15 Hz,探头体积15.6 cm^(3),满足了小型无人机搭载使用需求。

Aiming at the problem that the optical fibers of coherent population trapping(CPT)atomic magnetometer are located on the opposite sides of the sensor,which results in the probe is too large and is not suitable to be used on miniature unmanned aerial vehicle(UAV),a kind of miniature CPT magnetometer is designed,so that the incident and outgoing optical fibers can be installed on the same side of the sensor.The problem of over large probe caused by bending of optical fibers is solved.The test results show that the accuracy of miniature CPT atomic magnetometer is prior to 0.24 nT,the nonlinearity is prior to 0.00024%,the magnetic field tracking ability is prior to 375 nT/s,the noise of magnetometer is prior to 15.34 pT/Hz^(1/2)@1~15 Hz,and the volume of the probe is 15.6 cm^(3),which meets usage requirement of miniature UAV carrying.