InAs/InP quantum dash buried heterostructure mode-locked laser for high capacity fiber-wireless integrated 5G new radio fronthaul systems

摘要: We have developed and experimentally demonstrated a highly coherent low noise InP-based InAs quantum dash (QDash) buried heterostructure (BH) C-band passively mode-locked laser (MLL) with pulse repetition rate of 25 GHz for fiber-wireless integrated fronthaul 5G new radio (NR) systems. The device features broadband spectrum providing over 46 equally spaced optical channels an phase relative intensity (RIN) frequency range 10 MHz to 20 each individual channel typically less than 466.5 kHz -130 dB/Hz, respectively, average total output power ∼50 mW per facet. Moreover, the exhibits RF measured beat-note linewidth down 3 estimated timing jitter between any two adjacent 5.5 fs. By using this QDash BH MLL device, we successfully heterodyne based radio-over-fiber (RoF) wireless links at NR in underutilized around bit 16-Gb/s. performance is evaluated end-to-end system real-time terms error vector magnitude (EVM) (BER) by generating, transmitting detecting 4-Gbaud 16-QAM signals 0.5-m 2-m free-space indoor through length 25.22 km standard single mode fiber (SSMF) EVM BER under 8.4% 2.9 × 10−5, respectively. intrinsic characteristics conjunction its transmission indicate that MLLs can be readily used systems beyond communication networks.