Abstract
The ever-increasing demand for fiber transmission capacity requires increases in both spectral efficiency and usable optical bandwidth. Recently, the total transmission window has been enlarged to include C-, L- and S-bands and multiple-band transmissions were demonstrated at 40 Gbps.1–4 However spectral expansion with band per band management requires increasingly complex and expensive equipment, and bandwidth gaps, that cannot be used for transmission, are produced between the bands.
© 2002 Optical Society of America
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