Enabling Technology for 9.5-dB SNR Enhancement Utilizing Four-Wave Mixing Between a Conjugate Pair of Angle Modulation for Analog Radio-over-Fiber Links

We demonstrate a new application of four-wave mixing which enhances the SNR of angle-modulated RoF signals by 9.5 dB. We experimentally confirmed that the method produced an 8.8-dB enhancement and demonstrated a 400-MHz 1024-QAM transmission.