Photonic integrated circuit with encapsulated reference arm

US11402334B2 · kind B2 · utility

Assignees

• COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · FR
• ARYBALLE · FR

Inventors

• Loïc LAPLATINE · Grenoble, FR
• Mathieu Dupoy · Voiron, FR
• Maryse Fournier · Grenoble, FR
• Pierre Labeye · Grenoble, FR
• Thierry Livache · Grenoble, FR
• Cyril HERRIER · Grenoble, FR

Key dates

• Filing date: Jun 16, 2020
• Grant date: Aug 2, 2022
• Expiry date: Dec 31, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B2006/12159
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A photonic integrated circuit for an interferometric sensor includes a first waveguide called sensitive arm wherein a first portion of the light radiation is propagated, the sensitive arm being exposed to a first ambient medium and to at least one compound to be detected inducing a modification of the local refractive index perceived by the evanescent part of the electromagnetic field of the first portion of the light radiation, and a second waveguide called reference arm wherein a second portion of the light radiation is propagated, an encapsulation layer encapsulating the reference arm, the encapsulation layer being impermeable to the compound or compounds to be detected, so that the reference arm is exposed only to a second ambient medium, substantially of the same nature as the first ambient medium and without the compound to be detected and interferometric sensor comprising a photonic integrated circuit according to the invention.