Gaussian doped fiber source has high stability, which can effectively reduce the phase error of FOG and improve the measurement accuracy of FOG. Based on the theoretical analysis of the classical structure of the doped fiber light source, a two-stage single-pump structure is proposed, which is composed of the double-way forward structure and the one-way backward structure, and the optical path structure simulation is carried out to determine the optimal optical path parameter range. The stability of pump output wavelength and power directly affects the power stability and average wavelength stability of the light source. Therefore, a constant current driving scheme and a constant temperature control scheme are designed for the current-driven pumped laser. Experimental results show that the power variation rate of the doped fiber light source is 8.27%, and the average wavelength stability is 1.7×10-6 K-1 in the temperature range of -45 ℃ to 65 ℃.