Implementation of Array Balanced Photodetector for Coherent Detection of a Flash FMCW LiDAR 


Vol. 47,  No. 9, pp. 1430-1438, Sep.  2022
10.7840/kics.2022.47.9.1430


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  Abstract

In this paper, 2×2 Array BPD(Balanced Photodetector) using Balanced Photodetection receiver method is studied for 3D and 4D sensing suitable for Flash-type FMCW(Frequency Modulated Continuous Wave) LiDAR(Light Detection And Ranging) implementation. The FMCW LiDAR consists of a transmitter, a mixer, and a receiver, and receives a beat signal through this. The received beat signal acquired distance information through the FFT(Fast Fourier Transform) process. A circuit was made to drive the 2×2 Array BPD, and the circuit consists of an inverting amplifier and a differential amplifier. The manufactured driving circuit was tested by applying the signal generated through the waveform generator, and the actual beat signal was collected by applying the 2×2 Array BPD to the FMCW LiDAR system. Through the experiment, it can be confirmed that the signal strength is increased by comparing and analyzing before and after the differential amplification of the beat signal.

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[IEEE Style]

K. Soonwook, C. Sunjak, B. Jieun, R. C. Hyun, K. T. Geun, L. Junho, "Implementation of Array Balanced Photodetector for Coherent Detection of a Flash FMCW LiDAR," The Journal of Korean Institute of Communications and Information Sciences, vol. 47, no. 9, pp. 1430-1438, 2022. DOI: 10.7840/kics.2022.47.9.1430.

[ACM Style]

Kwon Soonwook, Choi Sunjak, Baek Jieun, Roh Cheong Hyun, Kim Tae Geun, and Lee Junho. 2022. Implementation of Array Balanced Photodetector for Coherent Detection of a Flash FMCW LiDAR. The Journal of Korean Institute of Communications and Information Sciences, 47, 9, (2022), 1430-1438. DOI: 10.7840/kics.2022.47.9.1430.

[KICS Style]

Kwon Soonwook, Choi Sunjak, Baek Jieun, Roh Cheong Hyun, Kim Tae Geun, Lee Junho, "Implementation of Array Balanced Photodetector for Coherent Detection of a Flash FMCW LiDAR," The Journal of Korean Institute of Communications and Information Sciences, vol. 47, no. 9, pp. 1430-1438, 9. 2022. (https://doi.org/10.7840/kics.2022.47.9.1430)

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pISSN : 1226 - 4717
eISSN : 2287 - 3880