Components and modules found in this section include: power/tap couplers and splitters for amplifiers, CATV, PON, network monitoring or expansion; WDM bandsplitters for metro and long haul; and PM couplers for amplification. Fused fiber couplers are available for shortwave (633-850 nm and visible light) applications. Custom modules for network expansion or PON applications are available in 1xN configurations up to 1x32 or built to specification.