Colorless Coherent Receiver Using 3×3 Coupler Hybrids and Single-Ended Detection

Abstract

We demonstrate a single-ended colorless coherent receiver using symmetric 3×3 coupler hybrids. This allows for colorless reception of fifty-five 112-Gb/s PDM-QPSK channels with 1-dB penalty and the receiver works well in transmission over 2560-km TrueWave-REACH-fiber.