In view of the stability of and inter-service interference effects on WDM-ROF-PON systems for multi-service transmission

a WDM-ROF-PON system for simultaneous transmission of two kinds of wireless services is designed.In the experiment

tests are performed on four ROF channels in downlinks

the results of which show that the system can simultaneously transmit 60 GHz 2.5 Gbit/s millimeter-wave signals and 5 GHz 155 Mbit/s DPSK signals for 20 km.In each channel

the power penalty in intermediate or lower frequency transmission is 0.4

2

.8 dB and in the millimeter-wave transmission 1.5

3

.2 dB and in millimeter-wave transmission only

the receiver sensitivity is improved by 0.6

2

dB.These results show that the signal transmission performances for both services in every channel are good

the system is stable and the millimeter-wave services are subject to minor interferences from lower frequency services.