Abstract
An optical assembly for realizing horizontal and vertical spot-size conversion to couple light from a thin waveguide to a thick waveguide is disclosed. The assembly comprises at least one first thin waveguide with a first section having a first optical mode field and a horizontal spot-size expansion section providing spot-size conversion for a first horizontal dimension of said first optical mode field of a light beam propagating in said first waveguide, and at least one second thick waveguide with a second section having a second optical mode field and a horizontal spot-size reduction section providing spot-size conversion for a second horizontal dimension of said second optical mode field of a light beam propagating in said second waveguide. The expanded end of said first waveguide is aligned and rotated to interface with the reduced end of said second waveguide, so that the mode fields in said first and second waveguides are rotated 90 degrees with respect to each other, whereby the spot size of a light beam so coupled between the first and second waveguides is expanded or shrunk in both transverse dimensions, depending on the direction of the light beam.
Patent family as of 30.12.2022
CN115136048 A20220930CN20208009679520201218EP4078256 A120221026EP2020082865720201218
FI129908 B20221031FI2019000609420191218
FI20196094 A20210619FI2019000609420191218
WO21123505 A120210624WO2020FI5085620201218
Link to current patent family on right
| Original language | English |
|---|---|
| Patent number | FI129908 |
| IPC | G02B 6/ 30 A I |
| Priority date | 18/12/19 |
| Publication status | Published - 19 Jun 2021 |
| MoE publication type | H1 Granted patent |