S. H. Autler^* and E. S. Rosenblum^*

• Lincoln Laboratory, Massachusetts Institute of Technology, Lexington, Massachusetts

K. H. Gooen^†

• National Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts

• ^*Operated with support from the U. S. Army, Navy, and Air Force.
• ^†Operated with support by the U. S. Air Force through the Air Force Office of Scientific Research.