Ursula Keller: SESAM ultrafast lasers and the world’s most accurate clock; 3D glasses and 500 million years of evolution.

Ursula Keller, SPIE's 2020 Gold Medal winner, talks about her work on the SESAM laser and her plans for the future before retiring. Senior editor Sue Petrie reads her editorial "What If" from this month’s issue of Photonics Spectra, and a look at how researchers at the University of Minnesota are studying cuttlefish to better understand the human brain. Ursula Keller is a professor of physics at ETH Zurich in Switzerland. This episode is sponsored by the Photonics Media Bookstore. Visit www.photonics.com/store for books about photonics technology, posters, apparel, and more. All Things Photonics is produced by Photonics Media and airs every other Tuesday. You can find links to the stories mentioned in the episode on our website, www.photonics.com/podcast.