Unambiguous range extension of a phase-shift based lidar by using two laser diodes with different modulation frequencies

Junhwan Jang; S. Hwang; Kyihwan Park

doi:10.1117/12.2021259

22 June 2013 Unambiguous range extension of a phase-shift based lidar by using two laser diodes with different modulation frequencies

Junhwan Jang, S. Hwang, Kyihwan Park

Author Affiliations +

Proceedings Volume 8769, International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013); 87693A (2013) https://doi.org/10.1117/12.2021259
Event: International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013), 2013, Singapore, Singapore

Abstract

In the phase-shift based lidar system, a distance between the lidar and an object can be determined via the phase difference between the reference signal and measured signal. The maximum unambiguous range for the phase-shift based lidar is inversely proportional to the modulation frequency of the signal. When the modulation frequency is increased for high distance resolution, the unambiguous range is decreased. In this paper, we described a method to extend the unambiguous range of the lidar, which is a considerable disadvantage of the phase-shift measurement method. In addition, we propose a method for implementing dual frequencies modulation technique with two laser diodes.

Citation Download Citation

Junhwan Jang, S. Hwang, and Kyihwan Park "Unambiguous range extension of a phase-shift based lidar by using two laser diodes with different modulation frequencies", Proc. SPIE 8769, International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013), 87693A (22 June 2013); https://doi.org/10.1117/12.2021259

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