An elongated trap potential for cold atoms is designed based on a quadrupole-Ioffe configuration.Phase fluctuations in a Bose-Einstein condensate(BEC),which is confined by the trap,are studied.We simulate the atom den...An elongated trap potential for cold atoms is designed based on a quadrupole-Ioffe configuration.Phase fluctuations in a Bose-Einstein condensate(BEC),which is confined by the trap,are studied.We simulate the atom density distribution induced by fluctuation after time of flight from this elongated trap potential and study the temperature measurement method related to the distribution.Furthermore,taking advantage of the tight confinement and radio frequency dressing technique,we propose a double well potential for splitting BECs.Our results are helpful for improving understanding of low-dimensional quantum gases and provide important guidance for atomic interferometry.展开更多
We report for the first time, to our knowledge, the diode-pumped continuous-wave(CW) thin-disk Yb3+-doped Lu2O3(Yb:LO) laser at 1 034 nm and the second-harmonic generation at 517 nm. With a 6.3% output coupler, the ma...We report for the first time, to our knowledge, the diode-pumped continuous-wave(CW) thin-disk Yb3+-doped Lu2O3(Yb:LO) laser at 1 034 nm and the second-harmonic generation at 517 nm. With a 6.3% output coupler, the maximum output power is 1.17 W under a pump power of 18.5 W. Moreover, the intracavity second-harmonic generation(SHG) is also achieved with power of 193 mW at 517 nm by using an LiB3O5(LBO) nonlinear crystal. The beam quality factor M2 is about 1.28. The fluctuation of the output power is about 3% in 1 h.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 61703025,91736028 and 61673041
文摘An elongated trap potential for cold atoms is designed based on a quadrupole-Ioffe configuration.Phase fluctuations in a Bose-Einstein condensate(BEC),which is confined by the trap,are studied.We simulate the atom density distribution induced by fluctuation after time of flight from this elongated trap potential and study the temperature measurement method related to the distribution.Furthermore,taking advantage of the tight confinement and radio frequency dressing technique,we propose a double well potential for splitting BECs.Our results are helpful for improving understanding of low-dimensional quantum gases and provide important guidance for atomic interferometry.
基金supported by the National Natural Science Foundation of China(No.61275135)
文摘We report for the first time, to our knowledge, the diode-pumped continuous-wave(CW) thin-disk Yb3+-doped Lu2O3(Yb:LO) laser at 1 034 nm and the second-harmonic generation at 517 nm. With a 6.3% output coupler, the maximum output power is 1.17 W under a pump power of 18.5 W. Moreover, the intracavity second-harmonic generation(SHG) is also achieved with power of 193 mW at 517 nm by using an LiB3O5(LBO) nonlinear crystal. The beam quality factor M2 is about 1.28. The fluctuation of the output power is about 3% in 1 h.
