Abstract
A wavelength division multiplexing (WDM) technique, which transmits signals with different wavelengths by means of a single optical fiber, can increase the capacity of optical fiber transmission systems. This paper describes the experimental results of a demultiplexer using a diffraction grating for a WDM system. The insertion loss of the demultiplexer could be decreased by using a large core output fiber, an Au-coated diffraction grating, and small aberration lenses. There were five channels in the 0.8-μm wavelength region. Wavelength spacing was 200 Å. Insertion loss for each channel was about 2 dB, and cross talk was <−30 dB.
© 1979 Optical Society of America
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