Photonic-assisted seamless channelization based on integrated three-stage cascaded DIs

Author

Jingjing Wang ; Minghua Chen ; Hongchen Yu ; Yunhua Liang ; Hongwei Chen ; Sigang Yang ; Shizhong Xie

Author_Institution

Dept. of Electron. Eng., Tsinghua Univ., Beijing, China

fYear

2013

fDate

28-31 Oct. 2013

Firstpage

21

Lastpage

24

Abstract

A novel photonic-assisted approach to realize seamless channelization based on silicon-on-insulator (SOI) integrated cascaded delay interferometers (DIs) is proposed and demonstrated. In this approach, cascaded DIs provides uniform spaced filters for different channels and a flat optical frequency comb (OFC) is used as local oscillator (LO) for frequency down-conversion. Since the frequency spacing of OFC is set to be twice of channel interval and IQ demodulation scheme is employed, cross talk from different channels can be eliminated. In addition, we designed the overlapped position of the two adjacent channels to be just 3dB lower than the filter peak for covering the whole spectrum seamlessly. This new concept has been testified with an experimental 8-channel receiver of 12.8-GHz bandwidth.

Keywords

demodulation; integrated optics; light interferometers; optical filters; oscillators; silicon-on-insulator; 8-channel receiver; demodulation scheme; different channels; filter peak; flat optical frequency comb; frequency 12.8 GHz; frequency down-conversion; frequency spacing; integrated three-stage cascaded DI; integrated three-stage cascaded delay interferometers; local oscillator; photonic-assisted approach; seamless channelization; silicon-on-insulator; uniform spaced filters; Band-pass filters; Demodulation; Microwave filters; Optical filters; Optical receivers; Radio frequency; IQ demodulation; cascaded DIs; channelization; optical frequency comb; sillicon-on-insulator;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Photonics (MWP), 2013 International Topical Meeting on

Conference_Location

Alexandria, VA

Type

conf

DOI

10.1109/MWP.2013.6724009

Filename

6724009