Also beware of the fringes - something that works on your span today might not after a fibre break or other incident.
Cheers Neil Sent from my iPhone On 11 Sep 2014, at 10:08, "Brandon Butterworth" <[email protected]> wrote: >> Well I'd certainly try this first with a stock inventory part before >> spending unnecessary money on the expensive vendor optic... > > I'd find the mux spec before puting something live that may only > be on the edge of staying live > >> Vendors do give different tolerances for what the actual wavelength >> transmitted will be and this will fluctuate slightly due to the >> manufacturing process > > Yes, that's the wide range I quoted, devices can be anywhere within that > (I've measured them), there's no reason for non cwdm be close to 1310 > >> optic sold as cwdm will have been checked against a tighter limit but I'd >> be shocked if you're buying LR that isn't almost exactly 1310. > > It may be some manufacturers use the same lasers for both parts but > usually the cwdm have a laser designed for stability, which costs more > (DFB vs Fabry-Perot) > > brandon >
