1 research outputs found
All-optical pulse compression of broadband microwave signal based on stimulated Brillouin scattering
Pulse compression processing based on stimulated Brillouin scattering (SBS)
in an optical fiber is theoretically and experimentally demonstrated. Broadband
microwave signal is electro-optically modulated onto the pump lightwave that is
launched into one end of the fiber. Acoustic wave in the fiber inherits the
amplitude and phase information of the pump lightwave and thus the coupling
between the acoustic wave and pump lightwave leads to the auto-correlated
process of the pump lightwave as well as the modulated microwave signal.
Derivation of the SBS coupling equations shows that the short-pulse probe
lightwave amplified by the pump lightwave possesses the nature of
auto-correlation formula. All-optical pulse compression of the broadband
microwave signal is implemented after a subtraction between the detected probe
pulse with and without SBS. A proof-of-concept experiment is carried out. The
pulse compression of a linear frequency-modulated microwave signal with 1 GHz
sweep range at the carrier frequency of 4.3 GHz is successfully realized, which
well matches the theoretical analysis.Comment: 9 pages,5 figure