Self-Written Waveguide Optical Pin Fabricated Using Photomask Transfer Method

This letter reports on a new self-written waveguide (SWW) optical interconnection pin. The SWW-pin is formed directly on an optical device using a photomask transfer method and has a 45
$^circ$
mirror on the end-face. The processed end-face provides 90
$^circ$
optical path redirection and enables strict handling and alignment in optical interconnections on an optoelectronic printed-wiring board. We present 90
$^circ$
path redirection characteristics of an SWW-pin having a coupling loss of 1.1 dB.