Title :
Time-Interleaved 20-GHz Modulated Wideband Converter Based on Random Optical Sampling
Author :
Qiang Guo ; Yunhua Liang ; Minghua Chen ; Hongwei Chen ; Sigang Yang ; Shizhong Xie
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
In this letter, time-interleaved multiwavelength pseudorandom binary sequence (PRBS) optical pulses are utilized to significantly increase the instantaneous bandwidth of the modulated wideband converter (MWC). A four-channel MWC with a bandwidth of 20 GHz is proposed for the first time, where four-wavelength optical pulse trains modulated by a 10.16-Gb/s PRBS signal are interleaved temporally after going through four sections of fibers with different lengths in parallel. The flat and ultrawide spectrum of the PRBS-modulated pulse train guarantees a uniform SNR and recovery probability. Sparse radio frequency signals ranging from 0.5 to 20 GHz are reconstructed faithfully from four-channel samples with only 360-MHz bandwidth.
Keywords :
binary sequences; microwave photonics; optical fibres; optical information processing; optical modulation; random sequences; SNR; bandwidth 20 GHz; bit rate 10.16 Gbit/s; four-channel modulated wideband converter; four-wavelength optical pulse trains; optical fibers; random optical sampling; recovery probability; sparse radiofrequency signals; time-interleaved modulated wideband converter; time-interleaved multiwavelength pseudorandom binary sequence optical pulses; Delay effects; Optical pulses; Photonics; Radio frequency; Sensors; Wideband; Compressive sampling; modulated wideband converter; restricted isometry property; time-interleaved pulses;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2015.2405535
