It is a fantastic letter. Very understated. He calls it an optical maser, it’s as if a maser was made to run in the optical. No flamboyant phrase, just straightforward science.
describing Ted Maiman's paper announcing the first operational laser. In an interview by Joan Bromberg on March 8, 1985, at University of Arizona. Niels Bohr Library & Archives, American Institute of Physics, College Park, MD USA.