A novel coupling device composed of a combination of microlens and pillar having an approximately 8μm diameter and 20μm height and grown from single-mode fiber (SMF) core end is proposed. This device was successfully fabricated by using a self-written waveguide and dipping method with UV-curable resin. Theoretical and experimental studies were done. A high coupling efficiency of more than -0.97dB was obtained for coupling to an ultrahigh numerical aperture (0.41) SMF with a spot diameter of 3.7μm at a 1.55μm wavelength in place of a silicon chip with an integrated spot-size converter. In contrast, it is only -4.0dB by a conventional SMF.
No takes yet. Share an insight, caveat, or question.
Mikami et al. (2020) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: