Echelon gratings have many beneficial properties when used as the dispersing mechanism of a fiber-optic wavelength multiplexer including high optical dispersion, high optical efficiency, greatly reduced sensitivity to polarization, simultaneous utility on many wavelength bands, and a capability for hierarchical multiplexing. The use of echelon multiplexers in a hierarchical environment is discussed, and a prototype echelon multiplexer is constructed and used to demonstrate the unique capabilities of this device for creating wavelength division multiplexing systems.

© 1987 Optical Society of America

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