M-bit optical delayer

[0026] like figure 1 As shown, it is a schematic structural diagram of an m-bit optical delayer according to an embodiment of the present invention, a plurality of optical switches and a plurality of delay units constitute an m-bit optical delayer, and each delay unit includes a wavelength division multiplexing , wavelength division multiplexing and multi-channel delay line; the whole module includes a 1*2 optical switch, a 2*1 optical switch and multiple 2*2 optical switches. One 1*2 optical switch and one 2*1 optical switch are respectively located at both ends of the delayer. Multiple 2*2 optical switches are connected through multiple delay units. By controlling one 1*2 optical switch, The state of one 2*1 optical switch and multiple 2*2 optical switches controls the number of delay units that the optical signal passes through to form different delay paths.

[0027] The m-bit delayer inputs n optical carriers of different wavelengths at the same time, and passes through diff