US 12,405,426 B2
Optical element
Kai-Ning Ku, Hsinchu County (TW); and Ming-Hsien Wu, Hsinchu County (TW)
Assigned to Industrial Technology Research Institute, Hsinchu (TW)
Filed by Industrial Technology Research Institute, Hsinchu (TW)
Filed on Nov. 28, 2022, as Appl. No. 18/070,413.
Claims priority of provisional application 63/284,002, filed on Nov. 29, 2021.
Claims priority of application No. 111143816 (TW), filed on Nov. 16, 2022.
Prior Publication US 2023/0168433 A1, Jun. 1, 2023
Int. Cl. G02B 6/30 (2006.01)
CPC G02B 6/30 (2013.01) 18 Claims
OG exemplary drawing
 
1. An optical element, comprising:
a substrate;
a first insulating layer disposed on the substrate;
a first optical waveguide layer disposed on the first insulating layer and configured to transmit a light beam;
a first edge coupler disposed on the first insulating layer and coupled to an end of the first optical waveguide layer; and
a first micro-optical element disposed on the substrate and comprising a first inclined surface,
a first groove is formed between the substrate, the first insulating layer, the first optical waveguide layer, and the first edge coupler, and the first micro-optical element is located within the first groove, and
the light beam is sequentially transmitted from the first optical waveguide layer to the first edge coupler, emitted from the first edge coupler, and reflected by the first inclined surface to an optical fiber connector,
wherein the first micro-optical element further comprises a second inclined surface, and the second inclined surface is opposite to the first inclined surface and faces the substrate, and
a bottom position of the first inclined surface is lower than a bottom of the first optical waveguide layer in a direction from the first optical waveguide layer to the substrate.