公开(公告)号：US20240219295A1

公开(公告)日：2024-07-04

申请号：US18555438

申请日：2022-04-11

Applicant: NKT Photonics A/S

Inventor： Peter Moselund ,  Rasmus Engelsholm ,  Erik Nicolai Christensen

IPC: G01N21/17 ,  G02F1/365

CPC classification number: G01N21/1702 ,  G02F1/365 ,  G01N2021/1706 ,  G01N2201/06113 ,  G01N2201/088

Abstract: Disclosed is an optical system for monitoring a parameter, such as a density or a pressure, of a fluid, in particular a gas or a mixture of gases, in a hollow core of an optical fiber, wherein the optical system comprises: an optical fiber which comprises a hollow core that is filled with a fluid, a pulsed laser for providing pulsed laser light, which is input into a first end of the optical fiber such that the laser light propagates through the hollow core from the first end to a second end of the fiber, wherein the pulsed laser light is configured to induce nonlinear processes by interacting with the fluid in the hollow core, and wherein the optical system further comprises a monitoring device for detecting acoustic vibrations in the fiber and for determining a parameter of the fluid based on the acoustic vibrations.

公开(公告)号：US20240201562A1

公开(公告)日：2024-06-20

申请号：US18555408

申请日：2022-04-11

Applicant: NKT Photonics A/S

Inventor： Peter Moselund

IPC: G02F1/365 ,  G02F1/35

CPC classification number: G02F1/365 ,  G02F1/3528

Abstract: A fiber arrangement, in particular for providing broadband light, preferably in the ultraviolet frequency range, comprises: a hollow core optical fiber (11), and at least one housing (15) having a chamber (27) in which a piezo device (25) is arranged, the piezo device (25) having a variable length and the chamber (27) being in fluid communication with a hollow core (13) of the fiber (11) such that a change of length of the piezo device (25) causes a change of the size of a volume (23) which is provided by the hollow core (13) and the chamber (27) for a fluid, such as a gas or a mixture of gases.