Low-loss and polarization-insensitive photonic integrated circuit based on micron-scale SOI platform for high density TDM PONs

We present a photonic integrated circuit of four-channel bidirectional-optical-subassembly on micron-scale silicon. Experimental results with loss less than 1.5dB, PDL<;0.5dB, and near 30dB isolation, allow for the realization of Class C+ QSFP TDM-PON OLT module.