A 160 Gbit/s (4 × 40 Gbit/s) OTDM multiplexer with active bit-wise phase stabilization

We demonstrated a 160 Gbit/s OTDM multiplexer, where optical phase between adjacent channels was stabilized with a CW laser. The optical spectrum variation was within 0.4 dB with temperature change between 15degC and 35degC.