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Synthetic aperture laser radar has higher resolution, so requires highermodulated bandwidth. Because the data volume of chirp or pulse coding schemesis too large, it brings much pressure to data acquisition and data processing.So, we can use dechirp to reduce the amount of data. However, there is aseriously non-linear problem in phase modulation, which strictly prohibited thedechirp usage. Therefore, in order to solve the above problems, we propose amethod based on Electro-Optic Modulators to achieve a large-bandwidth chirpsignal. Meanwhile, give a method to resolve the seriously non-linear problems.Firstly, by properly setting the amplitude of the input signal of electro-opticmodulators, the finite order signal coefficients are guaranteed to have anabsolute advantage. Then, an ideal chirp signal can be obtained by filteringthrough an optical filter. Finally, the feasibility of the scheme is proved bytheory and experiments.

A Solution to The Non-linearity of Electro-Optic Modulation Synthetic Aperture Lidar