US 10,883,890 B2 · Linear cavity ring down device

Abstract

Fibre linear cavity ring down device for decay time-based attenuation sensing, comprising a bi-directional fibre optic coupler having two fibre port coupling sides, a left-hand port side and a right-hand port side, and a port mirror; wherein signal input on one of said sides is coupled to signal output on the other of said sides; wherein the left-hand port side comprises a first fibre port (port 1) for coupling to an optical light source, the left-hand port side comprises a second fibre port (port 2) coupled to said port mirror (mirror 2), and the right-hand port side comprises a third fibre port (port 3) for coupling to a sensor fibre comprising one or more sensors and optically terminated by a sensor fibre mirror (mirror 1). The optical light source may be also an optical light receiver. The optical light source and receiver may preferably be an optical time domain reflectometer.

Claims19

Dependent claims

A fiber linear cavity ring down device for decay time-based attenuation sensing, comprising a bi-directional fiber optic coupler having two fiber port coupling sides, a first port side and a second port side, an optical time domain reflectometer and a port mirror;

wherein the first port side comprises a first fiber port, and a second fiber port coupled to said port mirror,
wherein the second port side comprises a third fiber port for coupling to a sensor fiber comprising one or more sensors and optically terminated by a mirror of said sensor fiber, and a fourth fiber port, and
wherein either the first fiber port or the fourth fiber port is coupled to the optical time domain reflectometer as an optical light source and receiver.

Dependencies are inferred from the claim text.

Linear cavity ring down device

Life of this patent

Linear cavity ring down device

Life of this patent

Abstract

Claims19