Hollow core fiber with passivation protected ends
A hollow core fiber is provided. The hollow core fiber includes at least one cleaved fiber end-face and a dielectric coating. The dielectric coating is formed by a passivation layer of dielectric that is applied to the at least one cleaved fiber end-face such that a portion of an interior surface that defines a hollow core of the hollow core fiber adjacent to the at least one cleaved fiber end-face is coated with the dielectric coating.
1 . A hollow core fiber comprising:
at least one cleaved fiber end-face; and
a dielectric coating formed by a passivation layer of dielectric applied to the at least one cleaved fiber end-face such that a portion of an overall length of an interior surface that defines a hollow core of the hollow core fiber adjacent to the at least one cleaved fiber end-face is coated with the dielectric coating to create a passivation protected end that prevents contamination.
2 . The hollow core fiber of claim 1 , wherein a depth of the portion of the interior surface that defines the hollow core of the hollow core fiber that is adjacent to the at least one cleaved fiber end-face with the dielectric coating is at a depth in which air can diffuse within the hollow core through the at least one cleaved fiber end-face.
3 . The hollow core fiber of claim 1 , wherein the dielectric coating is formed with a chemical vapor deposition system.
4 . The hollow core fiber of claim 3 , wherein the chemical vapor deposition system uses a temperature that is sufficiently low to not compromise an integrity of an outer protective cover of the hollow core fiber in forming the dielectric coating.
5 . The hollow core fiber of claim 1 , further comprising:
an outer protective layer;
a reflective interface; and
a glass capillary positioned between the outer protective layer and the reflective interface.
6 . The hollow core fiber of claim 1 , further comprising
anti-resonant capillary elements formed in the hollow core of the hollow core fiber.
7 . The hollow core fiber of claim 6 , wherein a portion of each anti-resonant capillary element adjacent the at least one cleaved fiber end-face includes the dielectric coating.
8 . A hollow core fiber:
at least one cleaved fiber end-face; and
a dielectric coating formed with a passivation layer of dielectric applied to the at least one cleaved fiber end-face with a chemical vapor deposition system such that a portion of an overall length of an interior surface that defines a hollow core of the hollow core fiber adjacent the at least one cleaved fiber end-face is coated with the dielectric coating to create a passivation protected end that prevents contamination, wherein a depth of the portion of the interior surface that defines the hollow core of the hollow core fiber that is adjacent to the at least one cleaved fiber end-face with the dielectric coating is a depth in which air can diffuse within the hollow core.
9 . The hollow core fiber of claim 8 , wherein the depth of the portion of the interior surface that defines the hollow core of the hollow core fiber is within a range of 500 to 1000 microns.
10 . The hollow core fiber of claim 8 , wherein the chemical vapor deposition system uses a temperature that is below a temperature that compromises an integrity of an outer protective cover of the hollow core fiber in forming the dielectric coating.
11 . The hollow core fiber of claim 8 , further comprising:
an outer protective layer;
a reflective interface; and
a glass capillary positioned between the outer protective layer and the reflective interface.
12 . The hollow core fiber of claim 8 , further comprising
anti-resonant capillary elements formed in the hollow core.
13 . The hollow core fiber of claim 12 , wherein a portion of each anti-resonant capillary element includes the dielectric coating adjacent the at least one cleaved fiber end-face.