Title :
All-optical harmonic frequency upconversion of radio over fibre signal using cross-phase modulation in semiconductor optical amplifier
Author :
Lee, J.S. ; Song, H.-J. ; Kim, W.B. ; Fujise, M. ; Kim, Y.-H. ; Song, J.-I.
Author_Institution :
Dept. of Inf. & Commun., Gwangju Inst. of Sci. & Technol., South Korea
Abstract :
All-optical harmonic frequency upconversion into the microwave frequency band for a WDM-based radio over fibre application is experimentally demonstrated by using a cross-phase modulation effect in a semiconductor optical amplifier. Maximum frequency conversion efficiencies from 2.5 GHz (fIF) to 12.5 GHz (fLO±fIF) and 22.5 GHz (2fLO±fIF) are 13.2 dB and 3.1 dB, respectively. The conversion efficiency to 2fLO±fIF is larger than unity for the IF signal wavelength range between 1547.22 and 1556 nm. The phase noise of the upconverted signal at 22.5 GHz is -80.0 dBc/Hz with 1 kHz offset frequency, which is limited by that of the LO source.
Keywords :
microwave photonics; optical fibre amplifiers; optical frequency conversion; optical modulation; phase modulation; phase noise; semiconductor optical amplifiers; wavelength division multiplexing; 1 kHz; 13.2 dB; 1547.22 to 1556 nm; 2.5 to 22.5 GHz; 3.1 dB; IF signal wavelength; LO source; WDM; cross phase modulation; microwave frequency band; optical harmonic frequency upconversion; phase noise; radio over fibre signal; semiconductor optical amplifier;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20045617
