Nanophotonic coherent imager

Aflatouni, Firooz; Abiri, Behrooz; Rekhi, Angad; Hajimiri, Ali

doi:10.1364/oe.23.005117

Cited by 78 publications

(47 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a special case, this enables multiple optical wavelengths to be sent to and received from a single angular spot. Such functionality may prove useful in the realization of free-space communication links [11,38], (holographic) video displays [14,39], remote sensing [40][41][42], and coherent imaging [43,44].…”

Section: Discussionmentioning

confidence: 99%

Optomechanical antennas for on-chip beam-steering

Sarabalis

Laer

2018

Opt. Express

View full text Add to dashboard Cite

Rapid and low-power control over the direction of a radiating light field is a major challenge in photonics and a key enabling technology for emerging sensors and free-space communication links. Current approaches based on bulky motorized components are limited by their high cost and power consumption, while on-chip optical phased arrays face challenges in scaling and programmability. Here, we propose a solid-state approach to beam-steering using optomechanical antennas. We combine recent progress in simultaneous control of optical and mechanical waves with remarkable advances in on-chip optical phased arrays to enable low-power and full two-dimensional beam-steering of monochromatic light. We present a design of a silicon photonic system made of photonic-phononic waveguides that achieves 44° field of view with 880 resolvable spots by sweeping the mechanical wavelength with about a milliwatt of mechanical power. Using mechanical waves as nonreciprocal, active gratings allows us to quickly reconfigure the beam direction, beam shape, and the number of beams. It also enables us to distinguish between light that we send and receive.

show abstract

Section: Discussionmentioning

confidence: 99%

Optomechanical antennas for on-chip beam-steering

Sarabalis

Laer

2018

Opt. Express

View full text Add to dashboard Cite

show abstract

“…[23]. A 4 × 4 array was used to emit a beam that was modulated according to a time-domain frequency modulated continuous wave (FMCW) ranging scheme, similar to FMCW radar systems.…”

Section: Optical Phased Arrays With Individually Tunable Emittersmentioning

confidence: 99%

Highly integrated optical phased arrays: photonic integrated circuits for optical beam shaping and beam steering

2016

View full text Add to dashboard Cite

Abstract:Technologies for efficient generation and fast scanning of narrow free-space laser beams find major applications in three-dimensional (3D) imaging and mapping, like Lidar for remote sensing and navigation, and secure free-space optical communications. The ultimate goal for such a system is to reduce its size, weight, and power consumption, so that it can be mounted on, e.g. drones and autonomous cars. Moreover, beam scanning should ideally be done at video frame rates, something that is beyond the capabilities of current opto-mechanical systems. Photonic integrated circuit (PIC) technology holds the promise of achieving low-cost, compact, robust and energy-efficient complex optical systems. PICs integrate, for example, lasers, modulators, detectors, and filters on a single piece of semiconductor, typically silicon or indium phosphide, much like electronic integrated circuits. This technology is maturing fast, driven by highbandwidth communications applications, and mature fabrication facilities. State-of-the-art commercial PICs integrate hundreds of elements, and the integration of thousands of elements has been shown in the laboratory. Over the last few years, there has been a considerable research effort to integrate beam steering systems on a PIC, and various beam steering demonstrators based on optical phased arrays have been realized. Arrays of up to thousands of coherent emitters, including their phase and amplitude control, have been integrated, and various applications have been explored. In this review paper, I will present an overview of the state of the art of this technology and its opportunities, illustrated by recent breakthroughs.

show abstract

“…7), after rendering, together with a photo of the coin. The high potential of our approach may be best appreciated by comparison with [85], which shows the topography of an US one-cent coin recorded with a 4 × 4 array of detectors, using a time-domain frequency modulated continuous wave ranging scheme. a fiber-laser system is set by the width of the RF resonance.…”

Section: Ambiguitymentioning

confidence: 99%

Ranging with Frequency-Shifted Feedback Lasers: From μm-Range Accuracy to MHz-Range Measurement Rate

Kim¹,

Ogurtsov²,

Bonnet³

et al. 2018

Exploring the World With the Laser

View full text Add to dashboard Cite

We report results on ranging based on frequency shifted feedback (FSF) lasers with two different implementations: (1) An Ytterbium-fiber system for measurements in an industrial environment with accuracy of the order of 1 µm, achievable over a distance of the order of meters with potential to reach an accuracy of better than 100 nm; (2) A semiconductor laser system for a high rate of measurements with an accuracy of 2 mm @ 1 MHz or 75 µm @ 1 kHz and a limit of the accuracy of ≥ 10 µm. In both implementations, the distances information is derived from a frequency measurement.The method is therefore insensitive to detrimental influence of ambient light. For the Ytterbium-fiber system a key feature is the injection of a single frequency laser, phase modulated at variable frequency Ω, into the FSFlaser cavity. The frequency Ω max at which the detector signal is maximal yields the distance. The semiconductor FSF laser system operates without external injection seeding. In this case the key feature is frequency counting that allows convenient choice of either accuracy or speed of measurements simply by changing the duration of the interval during which the frequency is measured by counting. 2 J. I. Kim et al.

show abstract

Nanophotonic coherent imager

Cited by 78 publications

References 15 publications

Optomechanical antennas for on-chip beam-steering

Optomechanical antennas for on-chip beam-steering

Highly integrated optical phased arrays: photonic integrated circuits for optical beam shaping and beam steering

Ranging with Frequency-Shifted Feedback Lasers: From μm-Range Accuracy to MHz-Range Measurement Rate

Contact Info

Product

Resources

About