Single-Chip Beam Scanner LiDAR Module for 20-m Imaging

Byun, Hyunil; Cho, Yong Chul; Hwang, Inoh; Jang, Byung Koog; Kim, Jinmyung; Lee, Changbum; Lee, Eunkyung; Lee, Jisan; Otsuka, Tatsuhiro; Shim, Dongshik; Shin, Changyong; Shin, Dongjae; Son, Kyunghyun; Choo, Hyuck; Ha, K. H.

doi:10.1109/iedm19574.2021.9720661

Cited by 7 publications

(5 citation statements)

References 6 publications

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“…The on-chip SOA is also expected to enhance the output beam power, and its initial feasibility has been presented [2,20]. Recently, Authors have demonstrated rapid progress in LiDAR performance up to 30m range, 20-fps frame rage, 120 × 20 resolution, and 26 × 3.6° FOV, thanks to the on-chip SOAs and TLD, all based on the CRS design [24][25][26][27][28][29]. Using the presented OPA design methodology powered by the emerging on-chip devices, we believe that the Si-photonics-based OPA is one of the promising approaches towards low-cost and compact LiDAR commercialization.…”

Section: Discussionmentioning

confidence: 99%

Aperiodic optical phased array based on number theory

Shin¹,

shin²,

Lee³

et al. 2023

Preprint

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The optical phased array has been developed to realize solid-state optical beam steering following the advent of silicon photonics. Thus far, its feasibility has lacked either steering quality or optical efficiency, and its optimal design still remains unknown. Herein, we propose a scalable and wavelength-independent phased array design methodology that achieves steering quality and optical efficiency. This novel design methodology is based on a special aperiodicity from number theory of a complete residue system that is fundamentally suited for phasor cancellation for the desired array sparsity. A specific design derived based on this methodology was implemented in silicon with 128 phase-controlled antennas in the O band, and it was experimentally verified in a two-dimensional steering demonstration that featured a record-high beam-forming efficiency (>30%) and a high-grating-lobe suppression (>10 dB) over a field-of-view of 40 ⅹ 7.2°. This optical efficiency improved by at least 250% compared with prior art.

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Section: Discussionmentioning

confidence: 99%

Aperiodic optical phased array based on number theory

Shin¹,

shin²,

Lee³

et al. 2023

Preprint

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“…From an industry perspective, a major trend in the development of photonic integrated circuits(PICs) including the DFB LD is the emergence of silicon(Si) photonics, which leverages the complementary-metal-oxide-semiconductor(CMOS) infrastructure of the Si industry [10][11][12][13][14][15][16][17][18][19][20][21][22][23]. In particular, the recently emerging III/V-on-Si platform enables single-chip integration including the light source, so expectations are rising for the commoditization of PICs in various applications including Datacenter and Light detection and ranging(LiDAR) [17][18][19][20][21][22][23][24]. Therefore, recent light source development tends to pursue single-chip integration along with various photonic devices on top of a Si substrate instead of a conventional III/V one.…”

Section: Introductionmentioning

confidence: 99%

Phase shift optimization of III/V-on-bulk-Si DFB LD for single-mode stability

Shin¹,

cha²,

Shin³

et al. 2023

Preprint

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A III/V-on-Bulk-Si DFB laser with a long phase shift section optimized for single-mode stability is presented. The optimized phase shift allows stable single-mode operations up to 20 times a threshold current. This mode stability is achieved by a gain difference between fundamental and higher modes maximized by sub-wavelength-scale tuning of the phase shift section. In SMSR-based yield analyses, the long-phase-shifted DFB laser showed superior performance compared to the conventional λ/4-phase-shifted ones.

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“…In order to overcome the limitations of mechanical LiDAR, solid-state LiDAR such as microelectromechanical systems (MEMS) [1], flash LiDAR [2], and optical phased arrays (OPA) [3]; have been investigated in order to overcome the limitation of mechanical LiDAR. Recently, optical phased array-based LiDAR has been actively researched due to its advantages in terms of scanning speed and compactness [4][5][6][7]. The OPA can be designed and fabricated on a silicon nitride-on-insulator or a silicon-on-insulator platform.…”

Section: Introductionmentioning

confidence: 99%

“…As for Si OPA, it can provide a high contrast index waveguide which reduces the size of OPA, allows the ion implantation process, and can be fabricated with a complementary metal-oxide-semiconductor (CMOS)-compatible process. As a result, Si OPA has a high potential for development and has been subjected to a number of studies on LiDAR application [3,6,7].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

10-m in-door high-accuracy distance measurement using Si optical phased array for LiDAR application

Yoon

Kim

et al. 2023

Silicon Photonics XVIII

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The light detection and ranging (LiDAR) system is an emerging photonic technology in various applications such as autonomous vehicles, drones, robots, and high-precision 3D imaging. Since conventional LiDAR has employed mechanical beam-steering, the scanning speed is restricted and more power consumption is required. On the other hand, Silicon optical phased array (Si OPA) is a promising solution that can replace the mechanical scanning LiDAR due to the advantages of electrical scanning, small footprint, and low operating power. In this study, we demonstrated a 10 m distance measurement with Si OPA using the time-of-flight (ToF) method. We developed an optical pulse generator for high distance accuracy measurement utilizing an electrical pulse generator, radio frequency amplifier, diplexer, and distributed feedback laser diode to generate an optical output pulse with a 300 ps pulse width. The Si OPA was fabricated using complementary metal-oxide-semiconductor (CMOS) compatible processes with an 8-inch silicon-on-insulator wafer. Considering Si chip loss and beam-forming efficiency, the erbium-doped fiber amplifier was used at the front end of the input of Si OPA. An avalanche photodiode that has high speed and sensitivity was utilized as a receiver and the converted optical pulse was observed by a real-time oscilloscope. Using this ToF distance measurement platform, we achieved a 10 m distance measurement with a ranging error of 1.2 cm using Si OPA. Si OPA-based distance measurement platform will allow the realization of 3-dimensional image sensing and further improvement will enable high-accuracy long-distance measurement.

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Single-Chip Beam Scanner LiDAR Module for 20-m Imaging

Cited by 7 publications

References 6 publications

Aperiodic optical phased array based on number theory

Aperiodic optical phased array based on number theory

Phase shift optimization of III/V-on-bulk-Si DFB LD for single-mode stability

10-m in-door high-accuracy distance measurement using Si optical phased array for LiDAR application

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