Coherent solid-state LIDAR with silicon photonic optical phased arrays

Poulton, Christopher V.; Yaacobi, Ami; Cole, David B.; Byrd, Matthew J.; Raval, Manan; Vermeulen, Diedrik; Watts, Michael R.

doi:10.1364/ol.42.004091

Cited by 582 publications

(256 citation statements)

References 20 publications

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“…Scanning of the beam can be realized through mechanical [9,10] scanning or non-mechanical scanning (solid state). Non-mechanical scanning usually uses optical phased arrays with full control of the phase and frequency of a laser beam [11][12][13][14], although recently solid state optomechanical steering has also been proposed [15]. An alternative method, usually referred to as flash lidar, captures depth images through illuminating a part of the scene with a modulated light source.…”

Section: Introductionmentioning

confidence: 99%

Time-of-flight imaging based on resonant photoelastic modulation

et al. 2019

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A time-of-flight (ToF) imaging system is proposed and its working principle demonstrated. To realize this system, a new device, a free-space optical mixer, is designed and fabricated. A scene is illuminated (flashed) with a megahertz level amplitude modulated light source and the reflected light from the scene is collected by a receiver. The receiver consists of the free-space optical mixer, comprising a photoelastic modulator sandwiched between polarizers, placed in front of a standard CMOS image sensor. This free-space optical mixer downconverts the megahertz level amplitude modulation frequencies into the temporal bandwidth of the image sensor. A full scale extension of the demonstrated system will be able to measure phases and Doppler shifts for the beat tones and use signal processing techniques to estimate the distance and velocity of each point in the illuminated scene with high accuracy.

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Section: Introductionmentioning

confidence: 99%

Time-of-flight imaging based on resonant photoelastic modulation

et al. 2019

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“…To the best of our knowledge, this is the highest PAM4 data rate so far achieved with a sub-1 mm SiP modulator [11,12]. The low insertion loss and the ability to co-integrate SOH phase shifters with the full portfolio of standard silicon photonic devices makes the concept not only attractive for conventional optical communications, but also for emerging applications in the fields of quantum optics [13,14] or solid-state LiDAR [15].…”

Section: Introductionmentioning

confidence: 99%

Silicon-organic hybrid (SOH) Mach-Zehnder modulators for 100 GBd PAM4 signaling with sub-1 dB phase-shifter loss

et al. 2020

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We report on compact and efficient silicon-organic hybrid (SOH) Mach-Zehnder modulators (MZM) with low phase shifter insertion loss of 0.7 dB. The 280 µm-long phase shifters feature a π-voltage-length product of 0.41 Vmm and a loss-efficiency product as small as aUπL = 1.0 VdB. The device performance is demonstrated in a data transmission experiment, where we generate on-off-keying (OOK) and four-level pulse-amplitude modulation (PAM4) signals at symbol rates of 100 GBd, resulting in line rates of up to 200 Gbit/s. Bit error ratios are below the threshold for hard-decision forward error correction (HD-FEC) with 7 % coding overhead, leading to net data rates of 187 Gbit/s. This is the highest PAM4 data rate ever achieved for a sub-1 mm silicon photonic MZM.

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“…Owing to the complementary metal‐oxide semiconductor (CMOS) compatibility, silicon‐based photonic integrated circuits have shown huge potentials for optical interconnects in the power‐hungry high‐performance computers and data centers. Recently, growing efforts have been directed toward a series of emerging applications in field‐programmable gate arrays, artificial intelligence, quantum optics, optical processor, optical phased array, and so forth. Phase shifter is one of the fundamental building blocks for its diverse variety of functionalities including modulation, wavelength detuning, beam steering, etc.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Silicon Photonic Microheater Based on Black Arsenic–Phosphorus

Liu

Wang

et al. 2020

Advanced Optical Materials

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While black phosphorus has shown excellent optoelectronic properties in many aspects, the environmental instability ultimately places limits on its practical applications. Black arsenic–phosphorus (b‐AsP), an alloy of black phosphorus with arsenic atoms, has emerged as a new 2D material with better stability. Recently, the heterostructure via integration of 2D material with nanophotonic waveguides is opening an avenue for many on‐chip applications of phosphorene. However, the thermo‐optic (TO) properties, which are widely used for waveguide heaters, are not studied on b‐AsP yet. Herein, the TO effects of a b‐AsP/silicon van der Waals heterostructure are first investigated and its application as a transparent waveguide heater is demonstrated. A high efficiency of 0.74 nm mW−1 is achieved with a nonresonant and broadband heater based on 20 nm thick b‐AsP, which eliminates the need for enhancement by cavity‐assisted light–matter interaction, and thus allows for compact footprint, broadband operation, and low latency.

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Coherent solid-state LIDAR with silicon photonic optical phased arrays

Cited by 582 publications

References 20 publications

Time-of-flight imaging based on resonant photoelastic modulation

Time-of-flight imaging based on resonant photoelastic modulation

Silicon-organic hybrid (SOH) Mach-Zehnder modulators for 100 GBd PAM4 signaling with sub-1 dB phase-shifter loss

Highly Efficient Silicon Photonic Microheater Based on Black Arsenic–Phosphorus

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