Abstract:
We design and experimentally demonstrate 50 picoseconds (ps)
low loss delay line on 300 nm SOI platform. The delay line unit consists of
straight rib waveguide and strip bend section linked by a transition taper
waveguide. Low propagation loss of ~0.1 dB/cm is achieved on the straight
rib waveguide. With taking into account both low loss and desirable delay,
a complete design and characterization process for passive delay line is
presented. Our measurement results show that about 0.7 dB excess loss is
achievable for 50 ps delay. The loss can be further reduced by adjusting the
layout parameters.