Polarizing device

Lauri Lehtimäki; Mikko Harjanne; Matteo Cherchi

Polarizing device

Lauri Lehtimäki (Inventor)
, Mikko Harjanne (Inventor)
, Matteo Cherchi (Inventor)

BA6203 Silicon photonics

Research output: Patent › Patent

Abstract

A polarizing device includes: a first waveguide to guide input light, a second waveguide to guide TE-polarized light, wherein the second waveguide includes a tapered input portion to polarization-selectively couple TE-polarized light from the first waveguide to the second waveguide, wherein the tapered input portion symmetrically overlaps the first waveguide, and the thickness of the tapered input portion has been selected to substantially prevent coupling of TM-polarized light from the first waveguide to the second waveguide, wherein the refractive index of the second waveguide is higher than the refractive index of the first waveguide.

Patent family as of 21.7.2026
EP4168836 A1, EP4168836 B1, EP4168836 C0, FI130054 B, FI20205645 A, US12292598 BB, US2023333321 AA, WO21255347 A1

Original language	English
Patent number	EP4168836 B1
IPC	G02B6/122
Priority date	18/06/20
Filing date	18/06/21
Publication status	Published - 18 Feb 2026
MoE publication type	H1 Granted patent

Cite this

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title = "Polarizing device",

abstract = "A polarizing device includes: a first waveguide to guide input light, a second waveguide to guide TE-polarized light, wherein the second waveguide includes a tapered input portion to polarization-selectively couple TE-polarized light from the first waveguide to the second waveguide, wherein the tapered input portion symmetrically overlaps the first waveguide, and the thickness of the tapered input portion has been selected to substantially prevent coupling of TM-polarized light from the first waveguide to the second waveguide, wherein the refractive index of the second waveguide is higher than the refractive index of the first waveguide. Patent family as of 21.7.2026 EP4168836 A1, EP4168836 B1, EP4168836 C0, FI130054 B, FI20205645 A, US12292598 BB, US2023333321 AA, WO21255347 A1",

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TY - PAT

T1 - Polarizing device

AU - Lehtimäki, Lauri

AU - Harjanne, Mikko

AU - Cherchi, Matteo

PY - 2026/2/18

Y1 - 2026/2/18

N2 - A polarizing device includes: a first waveguide to guide input light, a second waveguide to guide TE-polarized light, wherein the second waveguide includes a tapered input portion to polarization-selectively couple TE-polarized light from the first waveguide to the second waveguide, wherein the tapered input portion symmetrically overlaps the first waveguide, and the thickness of the tapered input portion has been selected to substantially prevent coupling of TM-polarized light from the first waveguide to the second waveguide, wherein the refractive index of the second waveguide is higher than the refractive index of the first waveguide. Patent family as of 21.7.2026 EP4168836 A1, EP4168836 B1, EP4168836 C0, FI130054 B, FI20205645 A, US12292598 BB, US2023333321 AA, WO21255347 A1

AB - A polarizing device includes: a first waveguide to guide input light, a second waveguide to guide TE-polarized light, wherein the second waveguide includes a tapered input portion to polarization-selectively couple TE-polarized light from the first waveguide to the second waveguide, wherein the tapered input portion symmetrically overlaps the first waveguide, and the thickness of the tapered input portion has been selected to substantially prevent coupling of TM-polarized light from the first waveguide to the second waveguide, wherein the refractive index of the second waveguide is higher than the refractive index of the first waveguide. Patent family as of 21.7.2026 EP4168836 A1, EP4168836 B1, EP4168836 C0, FI130054 B, FI20205645 A, US12292598 BB, US2023333321 AA, WO21255347 A1

UR - https://fi.espacenet.com/publicationDetails/biblio?II=0&ND=3&adjacent=true&locale=fi_FI&FT=D&date=20231019&CC=US&NR=2023333321A1&KC=A1

M3 - Patent

M1 - EP4168836 B1

Y2 - 2021/06/18

ER -

Polarizing device

Abstract

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