FiberLabs offers a wavelength tunable filter for expanded operation range O-L band. It was originally designed for O-band LAN-WDM/CWDM transceiver testing, but can be used for any general purposes.
Tunable Filters
Optical filter solutions include Thin Film, Polymer, Low-Reflectance ND and CWDM optimized, and tunable filters.
From 1 to 4 Channels with arbitrary user-defined wavelengths, bandwidths and attenuations.