A new optical heterodyning method based on the Fiber Bragg Grating Filters is proposed. Because the two optical waves
for heterodyning are filtered from a single laser, this technique can eliminate the phase noise of the usual optical
heterodyning technology and the system performance is improved. With the simulation results, the system's transmission
performance of the optical millimeter wave by the new method is verified.
In this paper, a Radio Over Fiber (ROF) system with bus network topology using optical carrier suppression (OCS)
technique is investigated. The loss along the optic fiber bus link is analyzed theoretically. The transmission distance of
the ROF signal is investigated and simulated. The capacity <i>N</i> of the ROF system, that is, the largest number of BSs the
system can accommodate,is also calculated and simulated. And the simulated results certify our theoretical analysis. Also,
as the result <i>N</i> is not ideal, a method to compensate the loss along the bus link is introduced and again, the capacity and
transmission distance after the compensation is calculated and simulated. The result show that after the use of optical
amplifier, the signal was improved and the capacity was enlarged and the transmission distance was extended.