Application of the phase-stitching technique in an external-modulated FMCW laser ranging system

Bing Dai; Yu Fu

doi:10.1117/12.2667170

27 January 2023 Application of the phase-stitching technique in an external-modulated FMCW laser ranging system

Bing Dai, Yu Fu

Proceedings Volume 12550, International Conference on Optical and Photonic Engineering (icOPEN 2022); 125500Q (2023) https://doi.org/10.1117/12.2667170
Event: International Conference on Optical and Photonic Engineering (icOPEN 2022), 2022, ONLINE, China

Abstract

This paper presents a phase-stitching method to increase the range resolution of a Frequency-Modulated Continuous Wave (FMCW) lidar. Based on an external-modulated Electro-Optic Modulator (EOM), the modulation range is increased when ten sidebands in the frequency domain are generated. By stitching the phase of these ten sidebands of the signal, the effective tuning range is broadened 55 times so that the ranging resolution is increased. To improve the detection precision, the system includes a reference coherent detection arm to correct the nonlinearity of the modulation source. The phase stitching method applied in this paper can achieve high-ranging resolution at a long distance. The system also features fast tuning, excellent stability, and low cost.

Citation Download Citation

Bing Dai and Yu Fu "Application of the phase-stitching technique in an external-modulated FMCW laser ranging system", Proc. SPIE 12550, International Conference on Optical and Photonic Engineering (icOPEN 2022), 125500Q (27 January 2023); https://doi.org/10.1117/12.2667170

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available