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

fYear

2011

fDate

21-23 Oct. 2011

Firstpage

1

Lastpage

3

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/IPOC.2011.6122862

Filename

6122862