A High-Speed High-Sensitivity Multi-Beam- Interferometer-Assistant SOA-PIN Photodetector With High Wavelength Drift Tolerance

In this work, we have proposed a multi-beam-interferometer-assistant SOA-PIN (MBIA-SOA-PIN) photodetector aiming at achieving a high sensitivity and a high wavelength drift tolerance by reducing the SOA’s amplified spontaneous emission (ASE) noise through a finite impulse response (FIR)-type filter. Our simulation results show that the MBIA-SOA-PIN photodetector has a wavelength drift tolerance of ±1.92 nm, and a sensitivity of -18.2 dBm at a bit-error-rate (BER) of 10-12 under a data rate of 240 Gbps. Compared with the GA-SOA-PIN photodetector which has the best performance among various types of photodetectors ever reported, the MBIA-SOA-PIN photodetector improves the wavelength drift tolerance and reduces the sensitivity dependence on polarization, at the trade-off of slightly lowering the sensitivity for TE polarized signals.