A demonstration of an optical synthesizer---a laser light source whose wavelength can be programmed---showcases a tool that provide arbitrary access to applications such as signal processing and quantum sensing.

In the third issue of Optical Communications and Networks Series in 2022, we have selected three intriguing articles reporting on recent advances optical communications networking.

A key feature of optical wavelength division multiplexed (WDM) networks is the inherently high degree of configurability available in the presence of tunable transceivers. More specifically, the flexibility of WDM networks lies in the ability to admit a large number of logical interconnections of nodes within the network. Indeed, this is a feature that distinguishes optical networks and drives ...