A probe capable of two dimensional scanning for endoscopic optical coherence tomography based on the asymmetry fiber cantilever driven by single piezo bender actuator is developed. However, Lissajous pattern realized by driving signal of sine form is hard to balance between uniformity, coverage and frame frequency, which hinders the optimization of scanning pattern. Based on response characteristic of the asymmetry fiber cantilever, the paper presents an amplitude modulated sine function as the driving signal for optimization of the scanning pattern. Simulations on scanning patterns under the same frame rate based on different driving signals are conducted, and evaluations in terms of uniformity and coverage are given. The comparative experiment is conducted too, and the results demonstrate the feasibility of this method.