Scalable Two-Mode 3-Port and 4-Port Mode Insensitive Silicon Photonic Switches

We propose and experimentally demonstrate a novel design approach for scalable 3-port 4-port mode insensitive multimode switching matrices the first two quasi-transverse electric (TE) modes. The phase shifter ensures less power consumption simultaneous signal transmission in division multiplexing (MDM) network. At 1550 nm, switch exhibits approximately 2.6 dB 3.3 insertion loss longest path with crosstalk of at most 10 8 over bandwidth 40 nm (1530 to 1570 nm) ${\mathrm {TE}}_{\mathrm {0}}$ {1}}$ modes, respectively. measured is 2.7 3.6 corresponding than TE payload also performed using both Gb/s non-return-to-zero (NRZ) 14.0625 Gbaud 4-level pulse-amplitude modulation (PAM4) pseudorandom binary sequence (PRBS)-31 data analyze performance switches. Clear open eyes are observed single-mode two-mode transmissions. low loss, intermodal large optical bandwidth, clear eye validate scalability proposed switches larger port count higher-order