Frequency-modulated continuous wave laser radar ranging method based on double heterodyne mixing
A frequency-modulated continuous wave and laser radar technology, applied in the field of microwave photonics, can solve the problems of cumbersome process, unsatisfactory effect, and high cost, and achieve the effect of expanding the frequency sweep range, good scalability, and improving linearity
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[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0029] See attached figure 1 The embodiment of the present invention discloses a frequency-modulated continuous-wave lidar ranging method based on double heterodyne mixing, the method includes:
[0030] S1. The linear frequency sweeping radio frequency signal is modulated to the laser signal output by the laser through a phase modulator to generate an optical frequency comb, which is divided into probe light and reference light after passi...
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