Abstract

A passive microscopic Fabry-Pérot Interferometer (FPI) pressure sensor includes an optical fiber and a three-dimensional microscopic optical enclosure. The three-dimensional microscopic optical enclosure includes tubular side walls having lateral pleated corrugations and attached to a cleaved tip of the optical fiber to receive a light signal. An optically reflecting end wall is distally engaged to the tubular side walls to enclose a trapped quantity of gas that longitudinally positions the optically reflecting end wall in relation to ambient air pressure, changing a distance traveled by a light signal reflected back through the optical fiber.

Document Type

Patent

Status

Active

Issue Date

5-10-2022

Patent Number

US 11326970 B2 [ 11,326,970 ]

CPC Classification

G01L11/02; G02B6/293

Application number

17/229,986

Assignees

United States of America as represented by the Secretary of the Air Force , Wright - Patterson AFB , OH ( US )

Filing Date

4-14-2021

Comments

This patent was previously hosted on AFIT Scholar in the Faculty Publications collection.

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