1. U.S. Naval Research Laboratory, 4555 Overlook Avenue SW, Washington, DC 20375, United States
2. Optogration, Inc., 60-G Concord Street, Wilmington, Massachusetts 01887, United States
3. University of Virginia, 351 McCormick Road, Charlottesville, Virginia 22904, United States
4. Laboratory for Telecommunication Sciences, 8080 Greenmead Drive, College Park, Maryland 20740, United States