Self-aligned optical connector assembly on polymer waveguide integrated package substrate for co-packaged optics

For an advanced co-packaged optics, we proposed the active-optical package substrate (AOP substrate), which is a Si-photonics-embedded package substrate with single-mode polymer-waveguide optical redistribution. In this work, we demonstrated a self-aligned optical connector assembly for the AOP substrate using a thin mechanical guiding structure less than
$10-\mu \mathrm{m}$
thickness. As a result, low-loss optical characteristics of 1-dB penalty was obtained for the assembled connector.