Strictly non-blocking 4× 4 silicon electro-optic switch matrix

The first path-independent insertion-loss (PILOSS) strictly non-blocking 4× 4 silicon electro-optic switch matrix is reported. The footprint of this switch matrix is only 4.6 mm × 1.0 mm. Using single-arm modulation, the crosstalk measured in this test is-13 dB～-27 dB. And a maximum crosstalk deterioration of 6dB caused by two-path interference is also found.