Optischer Wellenleiter und Optisches Element mit Optischem Wellenleiter

Details

Veröffentlichungs-Nr.

EP4776040

Anmeldetag

6. September 2024

Veröffentlichung

13. März 2025

Rechtsraum

EP

Abstract

Provided is an optical waveguide including a core portion configured to propagate light and a clad portion having a refractive index lower than that of the core portion. The clad portion has an underclad portion located on one surface of the core portion. In a shape of a cross-section of the core portion in a direction perpendicular to a light propagation direction, (i) H/L is 0.4 to 3, or (ii) a taper angle of the core portion is 50° or more and 130° or less, with the proviso that a width direction is a direction of a line along which the core portion and the underclad portion are in contact with each other, a thickness direction is a direction perpendicular to the width direction, L [µm] is a maximum length of the cross-section of the core portion in the width direction, and H [µm] is a maximum length of the cross-section of the core portion in the thickness direction, and the taper angle of the core portion is an angle formed by the underclad and a tangent line of a core side portion, drawn at its position corresponding to a length of 1/2 of the maximum length of the core portion in the thickness direction. At least one of the core portion or the clad portion is made of a cured product produced by curing an organopolysiloxane-containing composition containing an organopolysiloxane having a specific structure.

Anmelder

Firma

Mitsubishi Chemical Corporation

Land

🇯🇵 Japan