All-fiber broadband wavelength-division multiplexing using heterogeneous photonic lanterns
This work presents an all-fiber broadband wavelength-division multiplexing architecture using 1×7 heterogeneous photonic lanterns (PLs), specifically PL−(6 + 1) and PL−(4 + 3). By combining mismatched single-mode cores, namely SM450 and SMF28, without rigid geometric constraints, these devices break system degeneracy a...