Low loss and high isolation Ka-band SPDT switch

An efficient way of third-order dispersion compensation for reshaping parabolic pulses through normal dispersion fiber amplifier

“…Since TOD degrades the pulse form severely, numerous research works have been undertaken on the compensation of TOD-induced effect in the fiber link; and the most attractive one is the time-reversal technique using time lenses [28][29][30][31][32][33][34][35]. In many applications of time-reversal systems (TRSs) such as multiple antenna systems [36], acoustic communication [37] and compensation of phase distortion [28], the time reversal of the total electric field corresponds to simultaneous phase conjugation and time reversal of the complex envelope function.…”

“…The concept of temporal Fourier transformation in dispersive media was studied in [31]. In order to overcome the pulse distortion due to TOD, a midpoint TRS based on time lenses can be implemented [32]. All odd orders of dispersion can be compensated by using the midpoint TRS [28,32], which is beneficial for soliton pulse propagation.…”

“…In order to overcome the pulse distortion due to TOD, a midpoint TRS based on time lenses can be implemented [32]. All odd orders of dispersion can be compensated by using the midpoint TRS [28,32], which is beneficial for soliton pulse propagation. It is noted that the optical field envelope at the receiver end is the same as the input signal, except that the bit sequence is reversed [28,32].…”

“…All odd orders of dispersion can be compensated by using the midpoint TRS [28,32], which is beneficial for soliton pulse propagation. It is noted that the optical field envelope at the receiver end is the same as the input signal, except that the bit sequence is reversed [28,32]. The TRS is basically a 4-f configuration consisting of two time lenses where the first time lens containing an optical fiber generates the Fourier transform of the input signal at the focal plane, and the second one comprising another optical fiber placed after the temporal filter produces the inverse Fourier transformation, i.e.…”

“…The TRS is basically a 4-f configuration consisting of two time lenses where the first time lens containing an optical fiber generates the Fourier transform of the input signal at the focal plane, and the second one comprising another optical fiber placed after the temporal filter produces the inverse Fourier transformation, i.e. the output signal becomes time reversed [32]. Yang et al [33] proposed a technique of direct implementation as well as inverse Fourier transformation using time lenses without any spatial analog for which the bit sequence at the output is not time flipped.…”