Abstract
In this paper, a wavelength division multiplexing carrier-less amplitude phase modulation passive optical network (WDM–CAP–PON) integration with visible laser light communication (VLLC) system is proposed and experimentally demonstrated. To reduce the cost of WDM system, the optical frequency comb scheme using one Mach–Zehnder modulator (MZM) is utilized and five flat optical combs can be generated. Meanwhile, a blue laser diode (LD) as a VLLC optical source can provide high data rate and long transmission distance. Utilizing overlap frequency domain equalization (OFDE) and negative chirp of MZM, the system performance in both Q-factor and receiver sensitivity can be improved. After 20km standard single mode fiber (SSMF) and 4.5m free space transmission, the experimental results show that 10Gb/s CAP signal can be achieved under 7% forward error correction (FEC) limit of 3.8×10−3.
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