Applications of miniaturized GRIN lens fiber array in frequency-modulated continuous-wave LIDAR

Bin Li; Xiaoyan Hu; Lijun Yang; Jing Cao

doi:10.1117/12.2623985

27 March 2022 Applications of miniaturized GRIN lens fiber array in frequency-modulated continuous-wave LIDAR

Bin Li, Xiaoyan Hu, Lijun Yang, Jing Cao

Proceedings Volume 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications; 1216944 (2022) https://doi.org/10.1117/12.2623985
Event: Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 2021, Kunming, China

Abstract

With the development of laser technology, microwave photonic technology and optical communication technology, the frequency modulated continuous wave (FMCW) Light Detection and Ranging (LIDAR) has received more and more attention from scientific researchers. The main components of this technology include a laser emitting module, receiving optical system, detection module and digital information processing system. Here, we report the miniaturized graded-index (GRIN) lens fiber array used in FMCW LIDAR. The GRIN lens is a radial gradient index lens with the advantages of short focal length and large numerical aperture. Therefore, we used the Zemax software to design a GRIN lens with a large field of view (FOV) and high transmittance, and its FOV is 2°. In order to improve the FOV of the optical receiving system, the 2×8 GRIN lenses fiber array is fixed based on the compound eye arrangement, and the FOV can be increased to 4°×16°. The GRIN lenses fiber array and the chip of FMCW LIDAR are combined through the optical packaging. The experimental data demonstrated the distance measurement function of the device has realized.

Citation Download Citation

Bin Li, Xiaoyan Hu, Lijun Yang, and Jing Cao "Applications of miniaturized GRIN lens fiber array in frequency-modulated continuous-wave LIDAR", Proc. SPIE 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 1216944 (27 March 2022); https://doi.org/10.1117/12.2623985

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KEYWORDS

GRIN lenses

LIDAR

Ranging

Laser applications

Signal detection

Refractive index

Continuous wave operation

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