Hermetically sealed fiber sensing cable

A hermetically sealed fiber sensing cable comprising:

• a core fiber comprising at least one tetrahedral Bragg grating region, an outer surface and a length;
• a fiber cladding in contact with the core fiber along the entire length of the core fiber, the fiber cladding having an outer surface and a length;
• a carbon layer disposed upon the outer surface of the fiber cladding along the entire length of the fiber cladding, the carbon layer comprising diamond-like carbon;
• a hydrogen ion absorption layer in contact with the carbon layer, the hydrogen ion absorption layer being discontinuously disposed on the outer surface of the carbon layer corresponding to the Bragg grating region;
• and
• an outer sleeve.

A component for a hermetically sealed fiber sensing cable comprising:

• a core fiber comprising at least one tetrahedral Bragg grating region, an outer surface and a length;
• a fiber cladding in contact with the core fiber along the entire length of the core fiber, the fiber cladding having an outer surface and a length;
• a carbon layer disposed upon the outer surface of the fiber cladding along the entire length of the fiber cladding, the carbon layer comprising diamond-like carbon;
• and
• a hydrogen ion absorption layer in contact with the carbon layer, the hydrogen ion absorption layer being disposed on the outer surface of the carbon layer.

A component for a hermetically sealed fiber sensing cable comprising:

• a core fiber comprising at least one tetrahedral Bragg grating region, an outer surface and a length;
• a fiber cladding in contact with the core fiber along the entire length of the core fiber, the fiber cladding having an outer surface and a length;
• a carbon layer disposed upon the outer surface of the fiber cladding along the entire length of the fiber cladding, the carbon layer comprising diamond-like carbon;
• and
• a hydrogen ion absorption layer in contact with the carbon layer, the hydrogen ion absorption layer being discontinuously disposed on the outer surface of the carbon layer.