John Hall joins a new research group at JILA (Joint Institute for Laboratory Astrophysics), an NBS research institute at the University of Colorado at Boulder. He is responsible for several innovations and developments in laser technology, operated by the University of Colorado and the National Institute of Standards and Technology (NIST). In 2004 John Hall retires.

John Hall retires from NIST in November, 2004, although he remains a Senior Fellow there. Hall is still active in JILA and his consulting company (Hall Stable Lasers, LLC).

John Hall is a National Research Council Fellow at the National Bureau of Standards (now known as National Institute of Standards and Technology - NIST) from 1961 to 1962. He continues then working there as Physicist from 1962 to 1971. In 1971 he is appoined Senior Scientist and he retires in November 2004.

John Hall earns his Ph.D. in physics with a dissertation for which he builds an electron microwave spin resonance spectrometer to study the hyperfine spectrum of interstitial hydrogen atoms, under the guidance of Professor Robert T. Schumacher.

John Lewis Hall is born in Denver, Colorado. His father, John Ernest Hall, an electrical engineer, works for the U.S. Bureau of Reclamation. His mother, Rae Hall (née Long) is an elementary school teacher and singer. Supported by his family, Hall develops an early interest in electricity and radio. At the same time he is also involved in social activities such as scouts and a church youth group.

John Hall earns his M.S. at Carnegie Institute of Technology.

Hall with T.W. Hänsch conducts researches on measuring optical frequencies focusing on developing Hänsch’s idea for the optical frequency comb technique in which ultrashort pulses of laser light create a set of precisely spaced frequency peaks that resemble the spaced teeth of a hair comb, thereby providing a practical way of obtaining optical frequency measurements to an accuracy of 15 digits, or one part in one quadrillion. Hall helps Hänsch work out the details of this theory in 2000.

John Hall receives one fourth of the Nobel Prize for Physics along with Theodor W. Hänsch "for their contributions to the development of laser-based precision spectroscopy, including the optical frequency comb technique", the other half of the Nobel Prize goes to Roy J. Glauber.

John Hall gains a Westinghouse Scholarship to Carnegie Institute of Technology (now Carnegie Mellon University ) where he earns his B.S.