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Novel bulk optic multichannel resonator device for close packed wavelength multiplexing

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Abstract

A simple bulk optic structure is described that is suitable for multiplexing or demultiplexing many closely spaced wavelengths of light. Aside from input/output coupling hardware, the structure is comprised of a single glass, high finesse, Fabry-Perot etalon with a low efficiency diffraction grating etched into one face. The device concept provides a capability for multiplexing ratios in excess of 10, channel frequency separations smaller than 1 GHz, and can be designed to support optical networks having a total communication capacity in excess of 100 GHz. A laboratory model of the multiplexer was constructed and evaluated to demonstrate concept feasibility. The demonstration model, adjusted to demultiplex nine channels separated by 2.2 GHz for a total capacity of 20 GHz, exhibited a throughput optical coupling of −7 dB and a signal-to-crosstalk ratio greater than 15 dB.

© 1989 Optical Society of America

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