“…Its value may be positive or negative. UWB doublet pulses can be obtained by combining positive and negative monocycles with a proper delay Dong (2009). The shortages of the proposed method are the necessity for complicated electronic circuit for generation short electric Gaussian pulses, the use of an electro-optic phase modulator (EOM), the need for a comparatively long singlemode fiber (SMF), and a comparatively low operation rate and high bias currents of bulk SOAs.…”