Fluid diffusion resistant glass-encased optical sensor
First Claim
Patent Images
1. A pressure sensor for detecting an external pressure, comprising:
- an optical waveguide, wherein the waveguide comprises an optical pressure sensor;
a unitary quartz shell encasing the optical waveguide and for transmitting the external pressure to the optical pressure sensor; and
a non-polymeric coating formed on at least an external surface of the shell to prevent moisture ingress from affecting the optical pressure sensor.
10 Assignments
0 Petitions
Accused Products
Abstract
A fluid diffusion resistant tube-encased fiber grating pressure sensor includes an optical fiber 10 having a Bragg grating 12 impressed therein which is encased within a sensing element, such as a glass capillary shell 20. A fluid blocking coating 30 is disposed on the outside surface of the capillary shell to prevent the diffusion of fluids, such as water molecules from diffusing into the shell. The fluid diffusion resistant fiber optic sensor reduces errors caused by the diffusion of water into the shell when the sensor is exposed to harsh conditions.
48 Citations
45 Claims
-
1. A pressure sensor for detecting an external pressure, comprising:
-
an optical waveguide, wherein the waveguide comprises an optical pressure sensor;
a unitary quartz shell encasing the optical waveguide and for transmitting the external pressure to the optical pressure sensor; and
a non-polymeric coating formed on at least an external surface of the shell to prevent moisture ingress from affecting the optical pressure sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A method for forming a pressure sensor for detecting an external pressure, comprising:
-
providing an optical waveguide, wherein the waveguide comprises an optical pressure sensor;
encasing the optical waveguide in a unitary quartz shell, wherein the shell is capable of transmitting the external pressure to the optical pressure sensor; and
forming a non-polymeric coating on at least an external surface of the shell to prevent moisture ingress from affecting the optical pressure sensor. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
-
Specification