Optical fibers; optical fiber cables; [ optical components, namely, optical fiber coupler; optical fiber inline isolator, attenuator, electro-optic modulator; optical fiber amplifier; fiber optic tunable filter; fiber-optic switch; optical fiber splitter; ] optical fiber patchcord; optical fiber fanout; optical fiber pigtail [ ; optical fiber wavelength division multiplexers (WDM); optical fiber circulation conduits ]