We review our recent experiment on the Terabit-class coherent optical communication using a photonics integrated circuit-based optical amplifier. The 25.6-Tb/s 16-channel wavelength-division multiplexed (WDM) transmission (over 81-km fiber) proved the potential of such on-chip amplification for future coherent applications.
Erbium-doped fiber amplifiers have revolutionized long-haul optical communications and laser technology. Erbium ions could provide a basis for efficient optical amplification in photonic integrated circuits. We demonstrate a Si3N4 photonic integrated circuit–based erbium amplifier reaching > 100 mW output power and > 30 dB gain – comparable with commercial fiber amplifiers. Moreover, we will show that endowing Si3N4 photonic integrated circuits with Erbium-based optical gain opens the door to the miniaturization of high-performance fiber-based lasers on a chip.
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