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How do self-driving cars “see”? - Sajan Saini

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It’s late, pitch dark and a self-driving car winds down a narrow country road. Suddenly, three hazards appear at the same time. With no human at the wheel, the car uses smart eyes, sensors that’ll resolve these details all in a split-second. How is this possible? Sajan Saini explains how LIDAR and integrated photonics technology make self-driving cars a reality.

In fiber optic communications, the Mach-Zehnder modulator turns light into a digital signal of light pulses. In contrast, in LiDAR, the modulator is used to create pulses that allow a detector to probe distance and shape, by measuring pulse time of flight. What other technologies, or their specific applications, utilize light as a signal carrier or a visual probe? Are their other roles for light you can discover, in modern technology? Are there any examples where light plays a dual role?

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TED-Ed Animations feature the words and ideas of educators brought to life by professional animators. Are you an educator or animator interested in creating a TED-Ed Animation? Nominate yourself here »

Meet The Creators

  • Educator Sajan Saini
  • Director Igor Coric
  • Narrator Addison Anderson
  • Animator Nemanja Petrovic
  • Producer Milica Lapcevic
  • Sound Designer Nemanja Petrovic
  • Director of Production Gerta Xhelo
  • Editorial Producer Alex Rosenthal
  • Associate Producer Bethany Cutmore-Scott
  • Script Editor Eleanor Nelsen
  • Fact-Checker Brian Gutierrez

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