Single sideband optical modulation in radio over fiber system is implemented simply and effectively by the narrow-band fiber Bragg grating to decrease the dispersion penalty in long-distance transmission.The effect of double sideband on the performance of radio over fiber system is theoretically analyzed

and the requirements of single sideband filtering to reflective spectrum and reflectivity of narrow-band fiber Bragg grating are discussed.Using the narrow-band fiber Bragg grating based sideband modulation

the improvement of transmission performance of radio over fiber system with several different modulation formats

modulation speeds

and transmission distances is investigated.The experiment results show that the signal noise ratio is enhanced about 4dB on double sideband modulation in the 25 km 15GHz radio over fiber system with 16QAM modulation.