Title :
A frequency shift keying transmitter based on incoherent frequency-to-time mapping for free-space optical communications
Author :
Mu, Hongqian ; Xia, Haiyun ; Yao, Jianping
Author_Institution :
Microwave Photonics Res. Lab., Univ. of Ottawa, Ottawa, ON, Canada
Abstract :
A novel frequency shift keying (FSK) transmitter for free-space optical communications based on incoherent frequency-to-time mapping is proposed and demonstrated. In the proposed system, an incoherent broadband optical source is spectrally shaped by an optical filter that has a sinusoidal frequency response and a tunable free spectral range (FSR), and then modulated at a temporal gate. The temporally gated optical signal is sent to a dispersive device to realize frequency-to-time mapping. By switching the FSR of the optical tunable filter that is controlled by a data sequence, a temporal sinusoidal signal with FSK modulation is thus generated after frequency-to-time mapping. The proposed transmitter is experimentally demonstrated. An FSK signal at a bit rate of 700 Mbits/s is experimentally generated.
Keywords :
broadband networks; frequency shift keying; optical communication; optical filters; optical modulation; FSK modulation; bit rate 700 Mbit/s; free-space optical communication; frequency shift keying transmitter; incoherent broadband optical source; incoherent frequency-to-time mapping; optical tunable filter; sinusoidal frequency response; temporal gate; temporal sinusoidal signal; tunable free spectral range; Dispersion; Frequency shift keying; Microwave filters; Optical fiber filters; Optical transmitters;
Conference_Titel :
Microwave Photonics (MWP), 2010 IEEE Topical Meeting on
Conference_Location :
Montreal, QC
Print_ISBN :
978-1-4244-7824-8
DOI :
10.1109/MWP.2010.5664161
