A vertically-curved-waveguide surface optical coupler for coupling with a 10-µm-MFD standard single-mode optical fiber was developed. The fabricated coupler showed 1-dB bandwidths of >160 nm and >120 nm and coupling losses of 3.9 dB and 4.0 dB for TE and TM polarization.
© 2020 The Author(s)
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