Optical passive components refer to devices that handle optical signals but require no outside electrical power. These components manipulate light signals through processes such as transmission, reflection, polarization, coupling, splitting, filtering, and. A photonic integrated circuit is a microchip that contains two or more photonic components to form a functioning circuit, manipulating light on a semiconductor substrate. Use Coherent Bandpass and Edge Filters to efficiently separate and manipulate signals at closely spaced wavelengths in WDM applications with 200, 100, or even 50 GHz. Lightel fiber optic couplers and splitters are a reliable product with various bandpass, splitting ratios, fiber types and connector/packaging options.