Title :
A novel simple RF-to-digital photonic link based on a single phase modulator
Author :
Lv, Qiang ; Xu, Kun ; Dai, Yitang ; Li, Yan ; Wu, Jian ; Lin, Jintong
Author_Institution :
State Key Lab. of Inf. Photonics & Opt. Commun., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
A novel approach to implementing high-linearity microwave photonic link (MPL) based on coherent detection is proposed and experimentally demonstrated. The simultaneous optical in-phase and quadrature (I/Q) signals are implemented using a single phase modulator (PM) in conjunction with a polarization beam splitter (PBS). Thanks to the anisotropic electrooptic coefficient of lithium niobate, the homodyne interferometer link can be implemented with a single PM. The use of a single PM allows the link avoids the matching requirements of dual modulator schemes. The linearization leads to suppression of the third order intermodulation (IMD3) by more than 30-dB compared to the quadrature signal.
Keywords :
electro-optical effects; light interferometers; lithium compounds; microwave photonics; optical beam splitters; optical communication equipment; optical links; optical modulation; phase modulation; LiNbO3; RF-to-digital photonic link; anisotropic electrooptic coefficient; coherent detection; dual modulator schemes; high-linearity microwave photonic link; homodyne interferometer; optical in-phase signals; polarization beam splitter; quadrature signals; single phase modulator; third order intermodulation suppression; Optical distortion; Optical fiber communication; Optical interferometry; Optical modulation; Optical polarization; Optical receivers; Optical transmitters; I/Q-Demodulation; RF-to-Digital; linearization; microwave photonic links; modulator; phase;
Conference_Titel :
Information Photonics and Optical Communications (IPOC), 2011 International Conference on
Conference_Location :
Jurong West
Print_ISBN :
978-1-4673-0713-0
Electronic_ISBN :
978-1-4673-0711-6
DOI :
10.1109/IPOC.2011.6122862
