Nanotechnology Now – Press Release: CEA-Leti Envisions Widespread Use of LiDAR Systems Based on Integrated Optical Phased Arrays (OPAs): OPAs with Solid-State Beam Steering Can Reduce the Cost and Size of LiDAR Systems & Improve Performance; Results Reported at Photonics West 2021


Home > Press > CEA-Leti Envisions Widespread Use of LiDAR Systems Based on Integrated Optical Phased Arrays (OPAs): OPAs with Solid-State Beam Steering Can Reduce the Cost and Size of LiDAR Systems & Improve Performance; Results Reported at Photonics West 2021

Abstract:
Taking a critical step toward developing LiDAR systems for widespread commercial applications, CEA-Leti has developed genetic algorithms to calibrate high-channel-count optical phased arrays (OPAs), as well as an advanced measurement setup enabling wafer-scale OPA characterization.

CEA-Leti Envisions Widespread Use of LiDAR Systems Based on Integrated Optical Phased Arrays (OPAs): OPAs with Solid-State Beam Steering Can Reduce the Cost and Size of LiDAR Systems & Improve Performance; Results Reported at Photonics West 2021


Grenoble, France | Posted on March 9th, 2021

OPAs are an emerging technology made of arrays of closely spaced (around 1µm) optical antennas and which radiate coherent light in a broad angular range. The produced interference pattern can then be changed by adjusting the relative phase of the light emitted by each antenna. For example, if the phase gradient between the antennas is linear, a directional beam will be formed. By changing the slope of the linear gradient, the direction of the beam can be controlled, which enables solid-state beam steering.

This can improve performance in scanning speed, power efficiency and resolution compared to the heavy, power-hungry and expensive mechanical beam-steering systems used in current LiDARs. An additional feature of OPA-based LiDAR systems is that they have no moving parts, as the solid-state beam steering is achieved only by phase tuning the antennas, which significantly reduces the size and cost of these systems.

CEA-Leti reported the calibration and characterization results at Photonics West 2021 Digital Forum, in a paper titled “Development, Calibration and Characterization of Silicon Photonics-Based Optical Phased Arrays”.

“The development of a high-performance OPA would pave the way to inexpensive LiDAR systems for autonomous vehicles, holographic displays, biomedical imaging and many other applications,” said Sylvain Guerber, the lead author of the paper. “But widespread adoption of LiDAR will hinge on lower system costs and smaller form factors.”

LiDAR, which stands for light detection and ranging, has emerged as a key enabling technology for tomorrow’s sensing and vision systems. In addition to automotive and medical uses, they could enable autonomous mobility for drones and robots, as well as industrial automation. Commercial LiDAR systems must meet stringent requirements, especially for automotive applications. In particular, a high-power and low-divergence beam is needed to accurately resolve a scene. For example, resolving a 10cm object at 100m requires an OPA operating at a wavelength of 1µm with a circuit consisting of at least 1,000 antennas, each spaced 1µm apart. Therefore, the development of high-channel-count OPAs is necessary for a commercial OPA-based LiDAR system.

An integrated chip-scale OPA with solid-state beam steering can be produced by leveraging the benefits of a mature silicon photonics platform, Guerber said. However, this is only the first step toward a fully functional OPA because beam scanning requires a preliminary calibration. Due to the high number of required optical antennas, this calibration process can take a large amount of time, which is incompatible with massive deployment of a technology. Thus, the CEA-Leti team has developed what may be the first wafer-scale OPA characterization setup, which is an important step toward industrialization of OPA-based LiDARs. In addition, genetic algorithms based on Darwin’s theory of evolution have been developed to quickly and reliably calibrate high-channel-count OPAs. These allow up to 1,000x faster calibration than previously used algorithms.

Guerber noted that broad commercial adoption of LiDAR technology by the automotive industry and other markets is projected to be several years down the road. OPAs are a critical step, which CEA-Leti will continue to work on.

“There are still a lot of challenges, especially at the system level,” he explained. “A LiDAR is composed of many elements: a laser, an electronic driver, an OPA steering system, a detector and data-treatment capability. All of them must work together; the OPA is only a part of the system.”

This work was partially funded by the French ANR via Carnot funding, the ECSEL Vizta European project and the French National Program “Programme d’investissement d’avenir, IRT Nanoelec, n° ANR-10-AIRT-05

####

About CEA Leti
CEA-Leti, a technology research institute at CEA, is a global leader in miniaturization technologies enabling smart, energy-efficient and secure solutions for industry. Founded in 1967, CEA-Leti pioneers micro- & nanotechnologies, tailoring differentiating applicative solutions for global companies, SMEs and startups. CEA-Leti tackles critical challenges in healthcare, energy and digital migration. From sensors to data processing and computing solutions, CEA-Leti’s multidisciplinary teams deliver solid expertise, leveraging world-class pre-industrialization facilities. With a staff of more than 1,900, a portfolio of 3,100 patents, 12,000 sq. meters of cleanroom space and a clear IP policy, the institute is based in Grenoble, France, and has offices in Silicon Valley and Tokyo. CEA-Leti has launched 69 startups and is a member of the Carnot Institutes network. Follow us on www.leti-cea.com and @CEA_Leti.

Technological expertise

CEA has a key role in transferring scientific knowledge and innovation from research to industry. This high-level technological research is carried out in particular in electronic and integrated systems, from microscale to nanoscale. It has a wide range of industrial applications in the fields of transport, health, safety and telecommunications, contributing to the creation of high-quality and competitive products.

For more information, please click here

Contacts:
Press Contact

Agency

+33 6 74 93 23 47

Copyright © CEA Leti

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious
Digg
Newsvine
Google
Yahoo
Reddit
Magnoliacom
Furl
Facebook

News and information

Use of perovskite will be a key feature of the next generation of electronic appliances: Nanomaterials of perovskite dispersed in hexane and irradiated by laser; light emission by these materials is intense thanks to resistance to surface defects March 12th, 2021

Remote control for quantum emitters:Novel approach could become a asset in quantum computers and quantum simulation March 12th, 2021

Scientists stabilize atomically thin boron for practical use March 12th, 2021

Scientists build the smallest cable containing a spin switch March 12th, 2021

Possible Futures

Use of perovskite will be a key feature of the next generation of electronic appliances: Nanomaterials of perovskite dispersed in hexane and irradiated by laser; light emission by these materials is intense thanks to resistance to surface defects March 12th, 2021

Remote control for quantum emitters:Novel approach could become a asset in quantum computers and quantum simulation March 12th, 2021

Scientists stabilize atomically thin boron for practical use March 12th, 2021

Scientists build the smallest cable containing a spin switch March 12th, 2021

Chip Technology

Remote control for quantum emitters:Novel approach could become a asset in quantum computers and quantum simulation March 12th, 2021

Scientists build the smallest cable containing a spin switch March 12th, 2021

GLOBALFOUNDRIES 22FDX RF Solution Provides the Basis for Next-Gen mmWave Automotive Radar: Next-generation auto radar technology, based on GF’s 22FDX RF solution, will help make vehicles smarter and roads even safer than today March 10th, 2021

Instrument at BESSY II shows how light activates MoS2 layers to become catalysts March 8th, 2021

Announcements

Use of perovskite will be a key feature of the next generation of electronic appliances: Nanomaterials of perovskite dispersed in hexane and irradiated by laser; light emission by these materials is intense thanks to resistance to surface defects March 12th, 2021

Remote control for quantum emitters:Novel approach could become a asset in quantum computers and quantum simulation March 12th, 2021

Scientists stabilize atomically thin boron for practical use March 12th, 2021

Scientists build the smallest cable containing a spin switch March 12th, 2021

Automotive/Transportation

GLOBALFOUNDRIES 22FDX RF Solution Provides the Basis for Next-Gen mmWave Automotive Radar: Next-generation auto radar technology, based on GF’s 22FDX RF solution, will help make vehicles smarter and roads even safer than today March 10th, 2021

Graphene nanotubes gain traction in automotive market: OCSiAl confirms compliance with IATF 16949 March 9th, 2021

Expanding the freedom of design: powder coating on FRP thanks to conductive gelcoats with graphene nanotubes March 3rd, 2021

Islands without structure inside metal alloys could lead to tougher materials: These high-entropy alloys could lead to better technologies in transportation, energy and denfense January 29th, 2021

Events/Classes

CEA-Leti Announces 16 Papers to Be Presented At Photonics West 2021 and a Virtual Workshop on March 25 March 3rd, 2021

180 Degree Capital Corp. to Report Fourth Quarter 2020 Financial Results on Monday, February 22, 2021 and to Host a Conference Call on Tuesday, February 23, 2021 February 19th, 2021

Arrowhead Pharmaceuticals to Webcast Fiscal 2021 First Quarter Results January 20th, 2021

SEMICON Japan 2020 Virtual Set to Open with Sustainable Industry Growth, Smart Technology in the Spotlight December 8th, 2020

Photonics/Optics/Lasers

Compression or strain – the material expands always the same March 10th, 2021

Instrument at BESSY II shows how light activates MoS2 layers to become catalysts March 8th, 2021

Instrument at BESSY II shows how light activates MoS2 layers to become catalysts March 8th, 2021

Light in concert with force reveals how materials become harder when illuminated: When indented by a probe in darkness, wafers of some semiconductors are putty-like. When illuminated by light whose wavelength matches the band gap, they become hard, as electrons and holes freed by March 5th, 2021

Leave a Reply

Your email address will not be published. Required fields are marked *