Abstract
A multi-channel mode (de)multiplexer based on the supermode evolution in cascaded dual-core adiabatic tapers is designed and realized with ultrathin (∼50 nm) silicon-on-insulator nanowire waveguides. This dual-core adiabatic taper is designed optimally, so that all the supermodes are confined in the wide core at the input end and the highest-order supermode is localized in the narrow core at the output end. In this way, the highest-order supermode is dropped as the fundamental mode at the cross port. As an example, a (de)multiplexer with three mode channels is designed and fabricated. From the measured spectral responses, the fabricated device has a crosstalk lower than -20 dB and an excess loss less than 0.2dB in a bandwidth of ∼65 nm.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
