Abstract This study clarified the simulation of the high modulation effects on hybrid optical fiber links and OWC channel based on optical DP-QSK transceiver systems. The optimum lighted signal power band with the spectral wavelength after optical wireless communication channel is clarified. Total lighted form band power after optical fiber cable channel is studied. Total lighted form band power form after optical wireless communication channel is shown in numerical values. The total electrical band power form after optical DPSK receiver based optical fiber cable channel is demonstrated. Total base electrical band power form after optical DPSK receiver based optical wireless communication channel is clarified. Base band signal base form per noise base band form ratio is studied and numerical clarified after optical DPSK receiver against propagation length for both OFC and OWC channels. Total lighted base form power versus propagation length based both OFC and OWC channels is demonstrated. Optimum lighted form base power band form with time after optical fiber cable channel is studied. The max lighted form base power band form with time after optical wireless communication channel is simulated. Optimum lighted signal power band with the spectral wavelength after optical fiber cable channel is demonstrated. The total base electrical band form power after optical DPSK receiver is clarified numerically against propagation length for both OFC and OWC channels.