In order to develop erbium-doped fibers with temperature stability to achieve the requirements of super-fluorescent light sources for medium and high precision fiber optic gyroscopes, two types of erbium-doped fibers, Al-Er co-doped and Al-Ge-Er co-doped were prepared by a chelate vapour deposition method. The absorption coefficients and background losses of the two fibers were measured, and the temperature stability of the Al-Ge-Er co-doped fibers was verified experimentally by building a test platform for the super fluorescent light source. The study shows that the Al-Er co-doped fibers have higher absorption coefficients but worse background losses when they are fabricated with an equal volume of erbium chelate. The absorption coefficients of the two fibers are 35.6 dB/m and 20.0 dB/m at 1530 nm, and the background losses are 31.7 dB/km and 6.3 dB/km at 1200 nm. In the temperature range of -45.0 ℃~ 70.0 ℃, the spontaneous emission spectrum mean wavelength variation of the Al-Ge-Er co-doped fiber fabricated by chelate vapor deposition method is about 6.52×10-7 nm/℃ at the central wavelength of 1560.84 nm with the bandwidth of 10.51 nm. This fiber can achieve the requirements of a super-fluorescent light source for high precision fiber optic gyroscope. And this study provides a reference for the development of erbium-doped optical fibers.