What is john doyle caltech?

As an AI language model, I don't have access to personal or private information about any individual named John Doyle who may be affiliated with Caltech. However, Caltech is one of the top-ranked universities in the world, known for its outstanding programs in STEM fields and research in areas such as aerospace engineering, physics, and astronomy. It has produced numerous accomplished alumni and faculty, including several Nobel laureates. John Doyle may be an individual connected with the institution in some capacity, but without further information, it's difficult to provide more specific details about him.