Keysight’s Multi-Wavelength Meter family 86120C is the right, optimized tools to efficiently develop, manufacture, install and verify optical components and networks for next generation applications. Keysight multi-wavelength meters are Michelson interferometer-based instruments that measure wavelength and optical power of laser light over a specified wavelength range. Simultaneous measurements of multiple laser lines are performed allowing measurements of DWDM signals and multiple lines of Fabry-Perot lasers.