Swept source is a key component of optical coherence tomography; its spectral bandwidth and instantaneous linewidth directly affect the axial resolution and imaging depth of the imaging system. In a single filter, the two parameters are mutually exclusive. Here, a swept source system with two filters combined for optimization was proposed. Two semiconductor optical amplifiers in parallel were used as the gain medium. An acousto-optic tunable filter (AOTF) and a Fiber Fabry-Perot Tunable Filter (FFP-TF) were connected in series in a ring cavity. The tuning range and instantaneous linewidth of the AOTF were relatively wide, while those of the FFP-TF were comparatively narrower. Post synchronization and matching setting, the two filters worked in coordination with mutual advantage. The system delivers a swept output with a center wavelength of 1 316 nm. The spectral range is between 1 235-1 380 nm, while the tuning range, instantaneous linewidth, sweep speed, and output optical power are 145 nm, less than 0.02 nm, 1.35 kHz, and 0.48 mW, respectively. The swept light source can overcome the inherent defects of a single filter and achieve an effective compromise between the broad spectral bandwidth and narrow instantaneous linewidth. This is of great significance for optimizing the overall imaging performance.