Abstract
In this paper, we propose a thermo-optic reconfigurable three-mode (de)multiplexer
based on an asymmetrical horizontal three-waveguide directional
coupler that includes two identical single-mode waveguides and a
three-mode waveguide. Over the whole wavelength range of
1540–1560 nm, and for the TE (TM) polarization, our typical
fabricated device with polymer material shows coupling efficiencies as
high as 94% (93%) and 93% (92%) for the mode conversions of LP01−LP11a and LP01−LP11b, with the heating powers of
53.57 mW and 71.19 mW, respectively. Our proposed device
can be employed in the fields of reconfigurable mode-division
multiplexing systems.
Funder
National Natural Science Foundation of China