Research of fine tracking and signal detection system based on QD without beacon

Author

Liu, Shihui ; Tong, Shoufeng ; Song, YanSong ; Dong, Yan ; Yang, Han

Author_Institution

Nat. Defence Key Study Lab. of Air to Ground, Changchun Univ. of Sci. & Technol., Changchun, China

fYear

2012

fDate

23-25 Aug. 2012

Firstpage

269

Lastpage

271

Abstract

In this paper, we propose a simultaneous fine tracking and signal detection subsystem based on QD (Quadrant Detector) for FSO (Free Space Optical communication) system in 1550nm without beacon. Then we test the sensitivity, resolution, SNR characteristics and the influence the size of light spot on QD by building an indoor experiment. We select 1550nm waveband which suffers relatively less from background radicalization and atmospheric channel as the waveband of transmitter and receiver, also our selection catered for the trend of FSO system. We use the same QD for both fine tracking and signal detection for FSO in our design. Besides we use the scheme without beacon beam, for which we reduce the use of a beacon laser source, so we can obtain weight reduction and size decrease which is very important for FSO system.

Keywords

optical communication; signal detection; FSO system; SNR characteristics; atmospheric channel; background radicalization; beacon beam; beacon laser source; fine tracking; free space optical communication system; indoor experiment; light spot; quadrant detector; signal detection system; wavelength 1550 nm; weight reduction; Integrated circuits; Laser beams; Mirrors; Sensitivity; Signal detection; Signal to noise ratio; Testing; 1550nm; fine tracking; free space optical communication (FSO); quadrant detector (QD);

fLanguage

English

Publisher

ieee

Conference_Titel

Optoelectronics and Microelectronics (ICOM), 2012 International Conference on

Conference_Location

Changchun, Jilin

Print_ISBN

978-1-4673-2638-4

Type

conf

DOI

10.1109/ICoOM.2012.6316270

Filename

6316270