Open AccessCompact InP spot‐size converter with vertically tapered core layer formed by micro‐loading effect
Author(s) -
Ueda Y.,
Ogiso Y.,
Kashio N.,
Hashizume Y.,
Kikuchi N.,
Ishikawa M.,
Kohtoku M.
Publication year - 2017
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2017.0711
Subject(s) - materials science , wafer , core (optical fiber) , coupling loss , waveguide , coupling (piping) , optics , layer (electronics) , facet (psychology) , optoelectronics , optical fiber , composite material , physics , psychology , social psychology , personality , big five personality traits
A compact (200 μm) spot‐size converter (SSC) with a vertically tapered core layer is developed, which is fabricated with a simple wafer process using the micro‐loading effect. It is confirmed that the vertical spot size of the SSC exceeded 2 μm, which was double that of the original waveguide. As a result, an InP waveguide integrated with the SSCs exhibited a coupling loss of <1 dB per facet for a lensed fibre with a 2.5 μm mode‐field diameter. The fluctuation in the total of coupling and excess losses of the SSC was <0.5 dB.