Design of a CMOS ROIC for InGaAs Self-Mixing Detectors Used in FM/cw LADAR

Hu, Kai; Zhao, Yiqiang; Ye, Mao; Gao, Jian; Zhao, Gongyuan; Zhou, Guoqing

doi:10.1109/jsen.2017.2724064

Cited by 11 publications

(2 citation statements)

References 21 publications

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“…Long range and high precision applications such as autonomous vehicles and construction site mapping are dominated by expensive and fragile mechanically steered light detection and ranging (LIDAR) systems 3,4 . Meanwhile, solid-state solutions such as structured light 5 and time-of-flight arrays [6][7][8][9][10]19,20 are used when affordability, compactness, and reliability must be achieved at the expense of performance, such as in mobile devices and augmented reality systems. Optical phased arrays are a promising solid-state approach, but the development of long-range 2Dscanning systems has proved challenging, with current demonstrations limited to less than 20 meters [21][22][23] .…”

Section: Introductionmentioning

confidence: 99%

3D imaging via silicon-photonics-based LIDAR

Nicolaescu

Rogers

Piggott

et al. 2021

Silicon Photonics XVI

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Accurate 3D imaging is essential for machines to map and interact with the physical world 1,2 . While numerous 3D imaging technologies exist, each addressing niche applications with varying degrees of success, none have achieved the breadth of applicability and impact that digital image sensors have achieved in the 2D imaging world [3][4][5][6][7][8][9][10] . A large-scale twodimensional array of coherent detector pixels operating as a light detection and ranging (LIDAR) system could serve as a universal 3D imaging platform. Such a system would other high depth accuracy and immunity to interference from sunlight, as well as the ability to directly measure the velocity of moving objects 11 . However, due to difficulties in providing electrical and photonic connections to every pixel, previous systems have been restricted to fewer than 20 pixels [12][13][14][15] . Here, we demonstrate the first large-scale coherent detector array consisting of 512 (32×16) pixels, and its operation in a 3D imaging system. Leveraging recent advances in the monolithic integration of photonic and electronic circuits, a dense array of optical heterodyne detectors is combined with an integrated electronic readout architecture, enabling straightforward scaling to arbitrarily large arrays. Meanwhile, two-axis solid-state beam steering eliminates any tradeoff between field of view and range. Operating at the quantum noise limit 16,17 , our system achieves an accuracy of 3.1 mm at a distance of 75 meters using only 4 mW of light, an order of magnitude more accurate than existing solid-state systems at such ranges. Future reductions of pixel size using state-of-the-art components could yield resolutions in excess of 20 megapixels for arrays the size of a consumer camera sensor. This result paves the way for the development and proliferation of low cost, compact, and high-performance 3D imaging cameras, enabling new applications from robotics and autonomous navigation to augmented reality and healthcare.

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Section: Introductionmentioning

confidence: 99%

3D imaging via silicon-photonics-based LIDAR

Nicolaescu

Rogers

Piggott

et al. 2021

Silicon Photonics XVI

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“…In many commercial systems, [7][8][9] beam steering is performed mechanically by physically moving parts to direct and scan the beam over a certain area. While such mechanical steering has allowed the highest performances to be achieved, solid state beam steering approaches [10][11][12][13][14] are advantageous in terms of cost, compactness, and reliability. One proposed solid-state approach is the use of an optical phased array (OPA).…”

Section: Introductionmentioning

confidence: 99%

Silicon photonic beam steering module with backside coupling elements toward dense heterogeneous integration with drive electronics

et al. 2021

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Solid state beam steering devices are key elements in low cost, robust, and three-dimensional imaging systems. Here, we present a silicon photonic beam steering device based upon an 8 × 8 grating coupler focal plane array approach fed by a thermo-optic Mach-Zehnder switching tree. In this device, transmission of light from the grating couplers is made through the backside of the chip using topside mirrors allowing for both high-efficiency out-coupling and direct flip-chip integration of drive electronics, providing a path to scale to denser focal plane arrays with large numbers of points in the future. A −13.8 dB fiber-to-fiber transmission was achieved in our preliminary test around 1523 nm for the beam steering chip.

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