van Dijk, Victor Emmanuel Stephanus

The invention relates to an N-port smart data switch (SSVη for an optical data network (10-1) comprising a plurality of data network nodes (N1-1, N2-1, N3-1, N4-1, NN-1). The N-port smart data switch (SSW) comprises: i) a switching matrix module (SMM) having Y circuit switches (OCS1, OCS2..OCSY) being placed in parallel, each circuit switch (OCS1, OCS2..OCSY) having N/C inputs and N/C outputs; ii) an N-to-N*Y optical distribution block (PDB1) placed between the N optical inputs (xNi) and the switching matrix module (SMM); iii) a C-to-1-combiner stage (CBM1) placed between the N-to-N*Y optical distribution block (PDB1) and the switching matrix module (SMM), iv) an N-to-N*C optical distribution block (PDB2) placed between the switching matrix module (SMM) and the optical outputs; and v) a Y-to-1 combiner stage (CBM2) placed between the N-to-N*C optical distribution block (PDB2) and the optical outputs, wherein N is the number of optical inputs (xNi) and the number of optical outputs (xNo), wherein N is an integer equal to or larger than two, and wherein Y is the number of circuit switches (OCS1, OCS2..OCSY) within the switching matrix module (SMM), wherein Y is an integer equal to or larger than one, and C is the oversubscription factor of the N-port smart data switch (SSW), wherein C is an integer equal to or larger than two. The use of smaller switching matrices in the current invention leads to a significantly increased yield when implementing these functions in photonic integrated circuit.

The invention relates to a wavelength selection block (WSB-2) for a multi-port optical distribution block (PDB-2). The wavelength selection block (WSB-2) comprises: i) an optical input (INP) for receiving an optical fibre (1) carrying a multi-wavelength optical signal (λA) comprising a first number (K) of individual wavelength optical signals (λ1..λK); and ii) a second number (Y) of optical outputs (OUTP-1..OUTP-Y). The wavelength selection block (WSB-2) comprises four consecutive stages (S1..S4). In a first stage the multi-wavelength optical signal (λA) is split into consecutive individual wavelength optical signals (λ1..λK). In a second stage (S2) each individual wavelength optical signal (λ1..λK) is split into a respective group (GR-1..GR-K) of copies of the respective individual wave-length optical signal (λ1..λK), the number of copies equalling the multiplication factor (Y). In a third stage (S3) each copy of each consecutive group (GR-1..GR-K) of copies is individually gated for selectively passing or blocking the respective individual wavelength optical signal (λ1..λK) so as to obtain a respective gated individual wavelength optical signal (λ1g..λKg). In a fourth stage (S4) each consecutive gated individual wavelength optical signal (λ1g..λg) from each consecutive group (GR-1..GR-K) is combined so as to obtain a respective gated multi-wavelength optical signal (λAg), wherein each respective gated multi-wave-length optical signal (λAg) is coupled with a respective optical output (OUTP-1..OUTP-Y). The invention also relates to an optical distribution block (PDB-2) comprising a further number (N) of such wavelength selection blocks (WSB-2).

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