Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Pulse quality check: (a) measured root-mean-square bandwidth after propagation through 2-m of SMF (black) compared to simulation (red). (b) Radio frequency spectrum with a resolution bandwidth of 30 Hz and a span range of 20 kHz. Noise floor is shown in red.
