Integrated Comb Lasers for Coherent Optical Networks

Coherent optical communication systems have traditionally met the growing demand for data traffic by
increasing the data rate on single-wavelength channels. However, further scaling within a single wavelength
is becoming increasingly difficult, as continuously raising baud rates is both prohibitively complex and costly,
while expanding the constellation size reduces transmission reach. To address these limitations, coherent
superchannels utilizing multiple parallel wavelengths are emerging as a scalable solution to enable continued
bandwidth growth. Today, dual-wavelength channels are implemented with individual lasers, however as
channel count increases, integrated comb lasers can offer additional benefits over individual lasers.

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