Clock and data recovery circuit for 10-Gb/s asynchronous optical packets

Abstract-We demonstrate an all-optical clock and data recovery circuit for short asynchronous data packets at 10-Gb/s line rate. The technique employs a Fabry-Pérot filter and an ultrafast nonlinear interferometer (UNI) to generate the local packet clock, followed by a second UNI gate to act as decision element, performing a logical AND operation between the extracted clocks and the incoming data packets. The circuit can handle short packets arriving at time intervals as short as 1.5 ns and arbitrary phase alignment. Index Terms-Asynchronous traffic, clock and data recovery (CDR), optical packet switching, ultrafast nonlinear interferometer (UNI)

DV-QKD coexistence with 1.6 terabit/s classical channels in free space using fiber-wireless-fiber terminals

We experimentally demonstrate for the first time the simultaneous transmission of a COW-based DV-QKD channel and an 8×200 Gpbs 16-QAM coherent optical channels, both operating in the C-band over 2.5 m of free space enabled by Fiber-Wireless-Fiber terminals