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The transmission capacity of Ethernet has grown rapidly. Advanced multilevel modulation schemes, such as a 4-level pulse amplitude modulation (PAM4), are being investigated as to their suitability for next-generation 400GbE. The demand is now high for a transmitter front-end with a low-power laser diode (LD) driver that is applicable to such multilevel modulations. To meet this demand, we devised...
Error-free operation of high-speed wavelength-routed switching is demonstrated for 25-Gbit/s optical packets using 100 GHz-spaced arrayed-waveguide grating and a tunable transmitter that monolithically integrates a parallel-ring-resonator tunable laser with an electro-absorption modulator.
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