DWDM

DWDM (Dense Wavelength Division Multiplexing) packs many narrow-spaced channels onto a single fiber, with channel spacings of 100 GHz (0.8 nm) or 200 GHz (1.6 nm) on the ITU G.694.1 C-band grid. It's the standard tool for metro, long-haul, and high-capacity datacenter interconnect where fiber is scarce. Optiunik supplies DWDM mux/demux modules in 4, 8, 16, 32, and 40 channels at both 100 GHz and 200 GHz spacing — packaged as 1U rackmount, ABS module, LGX cassette, and discrete 1×2 / 1×N devices. Typical insertion loss is < 3 dB for 8-ch and < 7 dB for 40-ch, with channel passband > 0.5 dB at ± 0.1 nm, adjacent isolation > 25 dB, and PDL < 0.3 dB. Optional monitor and expansion ports are available on rackmount variants.