He went on to earn his PhD at Princeton University[1] for his thesis "Star Streaming" under the direction of Howard Percy "Bob" Robertson of the California Institute of Technology.
[7] During World War II, Stehle served in the army as a specialist working in the Manhattan Project as a theoretical physicist.
Stehle was a member of the Department of Physics and Astronomy at the University of Pittsburgh from 1947 until his retirement in 1989 and twice served as its chairman.
[9] While his initial interest lay primarily in the local work on nuclear reactor physics and later on fusion reactor physics, Prof. Stehle already pointed out at this time that it would make sense to enter the new field of laser research and quantum optics.
[10] He is credited with having set the physics department at the University of Pittsburgh on a productive track of research, for which he was awarded an honorary degree.