Draper patents high-speed single-photon detector to advance lidar

March 10, 2020
The patented single-photon detector can absorb and detect a single photon, and refresh for the next one within nanoseconds.
Draper
Draper has developed numerous hardware and software systems to support autonomous vehicle lidar. In addition to a new single-photon detector, Draper’s Hemera system can image using very few laser pulses. Compared to the original ‘Girl with a Pearl Earring’ image, Hemera lidar is shown using 100 laser pulses per pixel in greyscale, using a single laser pulse per pixel, and finally using 100 laser pulses per pixel (left to right).
Draper has developed numerous hardware and software systems to support autonomous vehicle lidar. In addition to a new single-photon detector, Draper’s Hemera system can image using very few laser pulses. Compared to the original ‘Girl with a Pearl Earring’ image, Hemera lidar is shown using 100 laser pulses per pixel in greyscale, using a single laser pulse per pixel, and finally using 100 laser pulses per pixel (left to right).

A new single-photon detector developed by engineers at Draper (Cambridge, MA) can outperform existing technologies and promises significant improvements in detection range and resolution--a boon for self-driving cars and other applications--according to Draper. The detector uses a silicon-germanium photodiode, has ultralow dark-counting rate, and timing resolution of better than one nanosecond.

The single-photon detector (SPD) is the first of its kind that can be configured in an array of multiple SPDs capable of detecting single particles of light with high timing resolution, speed, and efficiency over an unparalleled wavelength range, from visible to infrared.

The breakthrough earned Draper a patent and a distinction for the team that designed the detector. The technology has the ability to significantly improve remote sensing capabilities, says Steven Spector, a principal member of Draper’s technical staff.

“A sensor needs to be very efficient at detecting light. In applications like LiDAR, you are often limited in how much laser power you can use, but you want to be able to get a lot information from the objects in the scene. The most efficient detector you can have is one that can measure every single photon coming in to identify specific objects of interest,” Spector said.

The next-generation SPD designed at Draper is so fast and efficient that it can absorb and detect a single particle of light, called a photon, and refresh for the next one within nanoseconds. The engineers designed the system as an array of photodiodes and coupled them with single electron bipolar avalanche transistors (SEBAT) that turn an incoming photon into a large electric current that can be detected.

“A broad range of industries and research fields will benefit from a single photon detector with these capabilities,” says Spector. Other applications include quantum communications, surveillance, bioscience, imaging and nighttime operation, he added.

The patent lists the inventors as Steven Spector, Robin Dawson, Michael Moebius and Ben Lane.

The new offering adds to Draper’s growing portfolio of autonomous system and self-driving car capabilities. The portfolio includes the Draper APEX Gyroscope--a MEMS gyroscope that provides centimeter-level localization accuracy; Draper’s all-weather LiDAR technology, named Hemera, a detection capability designed to see through dense fog and is compatible with most LiDAR systems; and Draper’s LiDAR-on-a-Chip with MEMS beam-steering technology that creates a three-dimensional point cloud of a car’s surroundings.

SOURCE: Draper; https://www.draper.com/news-releases

About the Author

Gail Overton | Senior Editor (2004-2020)

Gail has more than 30 years of engineering, marketing, product management, and editorial experience in the photonics and optical communications industry. Before joining the staff at Laser Focus World in 2004, she held many product management and product marketing roles in the fiber-optics industry, most notably at Hughes (El Segundo, CA), GTE Labs (Waltham, MA), Corning (Corning, NY), Photon Kinetics (Beaverton, OR), and Newport Corporation (Irvine, CA). During her marketing career, Gail published articles in WDM Solutions and Sensors magazine and traveled internationally to conduct product and sales training. Gail received her BS degree in physics, with an emphasis in optics, from San Diego State University in San Diego, CA in May 1986.

Sponsored Recommendations

Next generation tunable infrared lasers

Nov. 28, 2023
Discussion of more powerful and stable quantum cascade tunable infrared lasers, applications, and test results.

What AI demands mean for data centers

Nov. 28, 2023
The 2023 Photonics-Enabled Cloud Computing Summit assembled by Optica took an aggressive approach to calling out the limitations of today’s current technologies.

SLP feature for lighting control available on cameras offering

Nov. 28, 2023
A proprietary structured light projector (SLP) feature is now available on the company’s camera series, including the ace 2, boost R, ace U, and ace L.

Chroma Customer Spotlight - Dr. David Warshaw, About his Lab

Nov. 27, 2023
David Warshaw, Professor and Chair of Molecular Physiology and Biophysics at the University of Vermont (UVM), walks us through his lab. Learn about his lab’s work with the protein...

Voice your opinion!

To join the conversation, and become an exclusive member of Laser Focus World, create an account today!