Compact Portable 795nm Dfb Diode Laser System For Atom Interferometer

Here, we demonstrate a homemade compact portable 795nm DFB laser system for atom interferometer. The whole laser system including the control unit is integrated in a module with a dimension of 345 mmx275 mmx70 mm. The laser frequency is respect to Rb-87 D-1 line F=2 -> F'=2 transition by modulation transfer spectroscopy (MTS) technique. The short- term linewidth is less than 700kHz@1.68ms, and the short-term stability of frequency is less than 157.4 kHz@1.5min-(standard deviation). The output power after a single mode polarization maintaining fiber is about 30 mW, and the laser power instability is better than 0.23%@11 h (RMS) and 2.4%@11 h (peak-to-peak value). The polarization extinction ratio (PER) for output fiber is specified to be greater than 25.9 dB, and the mode-hop-free tuning range is greater than15 GHz. The compact laser system has been applied in the state selection process of our atom interferometer and achieves about 90% state preparation efficiency.