1. Product Title Optical WDM Filter – Red/Blue Band & 1310/1550 nm Fiber Filter 2. Product Overview GracyFiber Optical Fiber WDM Filter is a thin-film wavelength-management component designed to separate or combine different optical bands over a single fiber. The product family supports 1310 nm, 1550 nm, and C-band Red/Blue wavelength configurations , with the supplied product description specifying a nominal operating wavelength range of 1260–1620 nm . 3. Key Features Thin