A quantum dash mode-locked laser-based photonic-aided broadband multi-Gb/s wireless signal delivery system at 5G NR

摘要: To support enhanced mobile broadband (eMBB) communication, 5G is going to use new radios (NRs) at frequencies above 24.25 GHz in the millimeter-wave (mm-wave) bands with abundant available bandwidths. The photonic generation, modulation and distribution of such ultra-high speed RF signals optical domain more promising compared bandwidth limiting electrical technology, however, it requires low noise coherent sources. In this paper, we present a highly InP-based p-n block buried heterostructure (BH) C-band InAs/InP quantum dash (QD) passively mode-locked laser (MLL) for aided wireless communication systems. device features repetition rates 25 resulting an frequency comb (CFC) 6-dB around 9 nm providing over 46 channels. Each individual channel CFC exhibits average phase integrated relative intensity (RIN) less than 500 kHz -130 dB/Hz range from 10 MHz 20 GHz, respectively. Its timing jitter beat-note linewidth between any two adjacent channels are as 5.53 fs 3 kHz, By using QD MLL, radio-over-fiber (RoF) quadrature amplitude modulated (QAM) signal delivery (K-band) successfully demonstrated 2-m free space distance through 25.22 km standard single-mode fiber (SSMF) total link capacity 16Gbit/s error vector magnitude (EVM) below requirements 12.5%.