Multi-mode fiber coarse WDM grating router using broadband add/drop filters for wavelength re-use

We demonstrate a grating-router with 37 nm channel spacing and 6 nm FWHM in the 800-900 nm range for WDM over multimode fiber. Broadband thin-film add/drop filters provide wavelength re-use enabling N/spl times/N fully non-blocking interconnection with N wavelengths.