The system adopts the scheme of double pass acousto-optic modulator configuration and "cat′s eye" structure, which eliminates the optical path deflection caused by frequency modulation and increases the tuning range of the laser frequency. Meanwhile, for the purpose of reducing the power fluctuations, we have constituted a feedback loop by using the method of radio frequency drive power. Through the theoretical calculation and experimental verification, the system chooses the lens with the focal length of 40 mm. When the laser frequency is tuned at 160 MHz, the overall fiber coupling efficiency is 56.8%. To ensure that the overall system utilization of laser is greater than 15%, the system′s effective frequency tuning range of 100 MHz.Through the power stabilization system, we have achieved the stability of ±0.07% with the frequency tuning range of 60 MHz and can maintain long-term stable operation.