A sampling device (2) comprising a first input port (4) and a second input port (5), wherein an input-signal is fed to the first input port (4) and wherein an optical clock signal is fed to the second input port (5). The sampling device (2) comprises a plurality of track and hold units (7 1 , 7 2 , 7 N ), wherein each of the plurality of track and hold units (7 1 , 7 2 , 7 N ) is connected to the first input port (4). The plurality of the track and hold units (7 1 , 7 2 , 7 N ) is further connected to the second input port (5) through an optical waveguide (11) in such a manner that the plurality of tack and hold units (7 1 , 7 2 , 7 N ) operate in a time-interleaved mode.