3D Self-Aligning, Polarization-Independent Fiber-to-Chip Couplers

We demonstrate low-loss (< 1 dB), broadband (BW∼100 nm near λ∼ 1550 nm) and polarization-independent fiber-to-chip couplers using 3D nano-printed polymer structures on Si
3
N
4
-on-SiO
2
platform.