The winner of the 2005 Nobel Prize in Physics reflects on a career spent with a fascination for lasers and science. John L. Hall is a fellow and senior research associate at JILA, a joint institute of the University of Colorado at Boulder and the National Institute of Standards and Technology. He was awarded the 2005 Nobel Prize in Physics.
Hall is known as a pre-eminent laser experimentalist, concentrating on improving the precision and accuracy with which lasers can produce a specific, sharp frequency or color of light, and the stability to hold that frequency. His work has been essential to precision spectroscopy for physical and chemical analysis, new tests and measurements of fundamental physical laws and constants, time and length, metrology and fiber-optic communications.