Optical direct-detection OFDM signal generation for radio-over-fiber link using frequency doubling scheme with carrier suppression.
This investigation demonstrates the generation of OFDM-RoF signal using frequency doubling technique for the first time, to the author's best knowledge. The 4-Gb/s OFDM signal using 16-QAM format modulated on each subcarrier at a center frequency of 19GHz is experimentally demonstrated. Benchmarked against the OOK format, the 16-QAM OFDM format has the higher spectral efficiency with a sensitivity penalty of less than 2.6 dB. After transmission over 50-km single mode fiber, the power penalties of RF OOK and OFDM signals are less than 0.5 dB.
Department of photonics and institute of electro-optical engineering, National Chiao-Tung University Hsinchu 300, Taiwan. jinting@ms94.url.com.tw
Chun-Ting
CT
Lin
Yu-Min
YM
Lin
Jason Jyehong
JJ
Chen
Sheng-Peng
SP
Dai
Po Tsung
PT
Shih
Peng-Chun
PC
Peng
Sien
S
Chi
D004560:Electricity; D055095:Optics and Photonics; D011846:Radio Waves; D013057:Spectrum Analysis