TY - JOUR T1 - Simple method for estimating usable bend radii of deeply etched optical rib waveguides JO - Electronics Letters UR - https://doi.org/10.1049/el:19910962 PY - 1991/08/15 AU - Pennings ECM AU - Deri RJ AU - Hawkins RJ ED - DO - DOI: 10.1049/el:19910962 PB - Institution of Engineering and Technology (IET) VL - 27 IS - 17 SP - 1532 EP - 1534 Y2 - 2026/02/04 ER -