Photonic vector signal generation employing a novel optical direct-detection in-phase/quadrature-phase upconversion.
This work demonstrates the feasibility of the generation of an RF direct-detection vector signal using optical in-phase/quadrature-phase (I/Q) upconversion. The advantage of the proposed transmitter is that no electrical mixer is needed to generate the RF signal. Therefore, I/Q data of RF signals are processed at baseband at the transmitter, which is independent of the carrier frequency of the generated RF signal. A 10 Gb/s 16 quadrature amplitude modulation signal is experimentally demonstrated. Following transmission over a 50 km single-mode fiber, the power penalty is negligible. Moreover, I/Q imbalance of the proposed transmitter is studied and compensated by digital signal processing, which is both numerically and experimentally verified.
Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 300, Taiwan.
Wen-Jr
WJ
Jiang
Chun-Ting
CT
Lin
Chung-hung
CH
Ho
Chia-Chien
CC
Wei
Po-Tsung
PT
Shih
Jason Jyehong
JJ
Chen
Sien
S
Chi