The Kramers - Kronig receiver has been shown to offer unprecedented opportunities in the design of optical transceivers where the need of high performance is accompanied by that of reduced complexity and cost. We review the operation principles and the various implementations of the KK receiver, including a direct detection implementation in which the necessary CW tone is transmitted with the signal, and one in which it is added at the receiver and plays the role of the LO of coherent receivers.

© 2017 OSA

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