The object
The manufactured glass fiber carried light over long distances with losses low enough for communications, replacing much heavier copper links and establishing the physical backbone of modern high-capacity networks. The fiber itself remains indispensable physical infrastructure beneath digital communications.
01
What Donald did
Co-invented low-loss optical fiber with Robert Maurer and Peter Schultz.
02
Why it matters
Low-loss optical fiber became the essential transmission medium for global telecommunications infrastructure.
03
Living-status check
The University of Arkansas announced Keck as the March 2026 Robert D. Maurer Lecture speaker, positive dated evidence that he was alive and active in 2026.