Abstract
A chirped grating segmented into partitions each having a constant blaze angle to use in a demultiplexer for coarse wavelength division multiplexing with multimode optical fibers is developed. Its designed configuration utilizes a resonance region to achieve high diffraction efficiency and large dispersion. The width, blaze angle, and diffraction order of each partition were optimized by vector diffraction analysis. The diffraction loss of the manufactured grating was less than , and polarization-dependent loss was less than within a wavelength width of at least . It is confirmed that a demultiplexer with the developed chirped grating had a wide passband and low cross talk.
© 2007 Optical Society of America
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