An experimental system for spectrum-spliced dense wavefength division multiplexed passive optical network(DWDM-PON)based on broadband light source(BLS)is proposed.We compare the different effects of crosstalk in adjacent channel and non-adjacent channel based on the theoretical calculation as well as the experimental packet loss rate and frequency spectrum.We also fox the theoretical and the experimental crosstalk power penalty.The results show that at the 0.8nm channel spacing,125Mbit/s per channel,the pow...