CN-122018074-A - Multilayer hollow anti-resonance optical fiber

Abstract

The present disclosure relates to multilayer hollow-core antiresonant optical fibers. The antiresonant hollow-core optical fiber includes an outer cladding, a retention tube, a first plurality of cladding elements disposed within the outer cladding, and a second plurality of cladding elements disposed in contact with an inner wall of the retention tube such that the second plurality of cladding elements define a hollow core, wherein a first wall thickness of the second plurality of cladding elements causes a first antiresonant state of the hollow core and a sum of wall thicknesses of the retention tube and the first plurality of cladding elements causes a second antiresonant state of the hollow core.

Inventors

• F. Suhartok

Assignees

• 朗美通经营有限责任公司

Dates

Publication Date

20260512

Application Date

20250928

Priority Date

20250708

Claims (20)

1. 1. An antiresonant hollow-core optical fiber comprising: An outer cladding; A holding tube; a first plurality of cladding elements disposed within the outer cladding layer, and A second plurality of cladding elements arranged in contact with the inner wall of the holding tube such that the second plurality of cladding elements define a hollow core, Wherein a first wall thickness of the second plurality of cladding elements causes a first antiresonant state of the hollow core and maintaining a sum of the wall thickness of the tube and the wall thickness of the first plurality of cladding elements causes a second antiresonant state of the hollow core.
2. 2. The antiresonant hollow-core fiber of claim 1, wherein the cladding elements of the first plurality of cladding elements and the second plurality of cladding elements are separated by a gap such that no cladding element is in contact with another cladding element.
3. 3. The antiresonant hollow core fiber of claim 1, wherein the first plurality of cladding elements are rotationally offset from the second plurality of cladding elements such that gaps between the first plurality of cladding elements and cladding elements of the second plurality of cladding elements are aligned.
4. 4. The antiresonant hollow core optical fiber of claim 1, wherein the first antiresonant state and the second antiresonant state are associated with the respective wall thicknesses of the first plurality of cladding elements, the second plurality of cladding elements, and the retention tube, the retention tube configured to reflect light from the hollow core back into the hollow core such that there is constructive interference between light reflected into the core from an outer wall boundary and light transmitted into an outer wall and then reflected into the core from an inner wall boundary.
5. 5. The antiresonant hollow-core optical fiber of claim 1, wherein the first antiresonant state and the second antiresonant state are associated with a wavelength of light in the hollow core.
6. 6. The antiresonant hollow-core fiber of claim 1, wherein a first pair of cladding elements of the second plurality of cladding elements is associated with a first angular distance and a second pair of cladding elements of the second plurality of cladding elements is associated with a second angular distance.
7. 7. An antiresonant hollow-core optical fiber comprising: An outer cladding; A first layer disposed within the outer envelope and defining a first interior volume, Wherein the first layer comprises a first set of cladding elements; A second layer disposed within the first layer and defining a second internal volume, Wherein the second layer comprises a second set of cladding elements, Wherein the second set of cladding elements defines a hollow core, and A holding tube provided between the first layer and the second layer, Wherein the configuration of the first set of cladding elements, the second set of cladding elements, and the retention tube is associated with reducing loss of a fundamental mode associated with the hollow core.
8. 8. The antiresonant hollow-core fiber of claim 7, wherein the first set of cladding elements is associated with a first annular configuration and the second set of cladding elements is associated with a second annular configuration.
9. 9. The antiresonant hollow-core fiber of claim 8, wherein the first and second annular configurations are configured with gaps between cladding elements such that no cladding element of the first or second set of cladding elements is in contact with any other cladding element of the first or second set of cladding elements.
10. 10. The antiresonant hollow-core fiber of claim 8, wherein the first annular configuration is offset from the second annular configuration such that gaps between the first set of cladding elements and the second set of cladding elements are aligned.
11. 11. The antiresonant hollow-core fiber of claim 7, wherein a first cladding element of the second set of cladding elements is associated with a first thickness and a second cladding element of the second set of cladding elements is associated with a second thickness such that a birefringent state is configured relative to the hollow core.
12. 12. The antiresonant hollow-core fiber of claim 7, wherein the first set of cladding elements comprises two or more cladding elements.
13. 13. The antiresonant hollow-core fiber of claim 7, wherein the second set of cladding elements comprises two or more cladding elements.
14. 14. The antiresonant hollow-core fiber of claim 7, wherein the fundamental mode has a simulated confinement loss of less than 1 decibel (dB)/kilometer (km).
15. 15. The antiresonant hollow-core fiber of claim 7, wherein the outer cladding is a ferrule.
16. 16. A layered hollow-core optical fiber comprising: a first plurality of cladding elements disposed in the first interior volume; A second plurality of cladding elements disposed in the second interior volume, and A holding tube disposed between the first interior volume and the second interior volume, Wherein the second plurality of cladding elements defines a hollow core, an Wherein respective wall thicknesses of the first plurality of cladding elements, the second plurality of cladding elements, and the retention tube are configured to cause an anti-resonant state of the hollow core.
17. 17. The layered hollow-core optical fiber of claim 16, comprising: an outer cladding surrounding the first plurality of cladding elements.
18. 18. The layered hollow-core optical fiber of claim 16, comprising: and a filler material disposed between the first cladding elements of the first plurality of cladding elements or the second cladding elements of the second plurality of cladding elements.
19. 19. The layered hollow-core optical fiber of claim 16, wherein adjacent cladding elements of the first plurality of cladding elements and the second plurality of cladding elements are not in contact.
20. 20. The layered hollow-core optical fiber of claim 16, wherein the antiresonant state is associated with an optical wavelength in the hollow core.

Description

Multilayer hollow anti-resonance optical fiber Cross Reference to Related Applications This patent application claims priority from U.S. provisional patent application No. 63/719,539, entitled "HOLLOW-CORE ANTI-resonant fiber (HOLLOW-CORE ANTI-RESONANT FIBER)" filed on day 11 and 12 of 2024, and U.S. provisional patent application No. 63/748,808, entitled "HOLLOW-CORE ANTI-resonant fiber (HOLLOW-CORE ANTI-RESONANT FIBER)". The disclosure of the prior application is considered to be part of the present patent application and is incorporated by reference into the present patent application. Technical Field The present disclosure relates generally to optical fibers and multilayer hollow-core antiresonant fibers. Background A hollow core optical fiber (HCF) is an optical fiber designed to direct light propagating through an air-filled, gas-filled, or vacuum core rather than through a solid glass core used in some optical fibers. Unlike optical fibers having a solid glass core, HCF has a central hollow core that is typically surrounded by a microstructured cladding. HCFs can be classified into different types based on the boot mechanism. One type of HCF includes a photonic band gap fiber that confines light by surrounding a hollow core with a periodic lattice of nodes. Another type of HCF, such as an antiresonant hollow core fiber (AR-HCF), includes an antiresonant fiber that surrounds a core with a cladding of a particular thickness of an elongated glass film antiresonant with light guided by the core. The microstructured cladding of AR-HCF may consist of a thin glass tube or film arranged in a way that prevents light from escaping from the hollow core by a mechanism called antiresonance. The design of the microstructured cladding is such that the microstructured cladding creates an antiresonant effect for light of certain wavelengths, effectively reflecting the light back into the hollow core. Accordingly, the antiresonant effect minimizes light leakage and improves transmission efficiency. AR-HCF can support a wide range of wavelengths, making AR-HCF suitable for a variety of applications, including telecommunications, sensing, and high power laser transmission. Disclosure of Invention In some embodiments, an antiresonant hollow-core optical fiber includes an outer cladding, a retention tube, a first plurality of cladding elements disposed within the outer cladding, and a second plurality of cladding elements disposed in contact with an inner wall of the retention tube such that the second plurality of cladding elements define a hollow core, wherein a first wall thickness of the second plurality of cladding elements causes a first antiresonant state of the hollow core and a sum of wall thicknesses of the retention tube and the first plurality of cladding elements causes a second antiresonant state of the hollow core. In some embodiments, an antiresonant hollow core optical fiber includes an outer cladding, a first layer disposed within the outer cladding and defining a first internal volume, wherein the first layer includes a first set of cladding elements, a second layer disposed within the first layer and defining a second internal volume, wherein the second layer includes a second set of cladding elements, wherein the second set of cladding elements defines a hollow core, and a retention tube disposed between the first layer and the second layer, wherein a configuration of the first set of cladding elements, the second set of cladding elements, and the retention tube is associated with reducing loss of a fundamental mode. The loss of the fundamental mode is associated with the hollow core. In some embodiments, a layered hollow core optical fiber includes a first plurality of cladding elements disposed in a first interior volume, a second plurality of cladding elements disposed in a second interior volume, and a retention tube disposed between the first interior volume and the second interior volume, wherein the second plurality of cladding elements define a hollow core, and wherein respective wall thicknesses of the first plurality of cladding elements, the second plurality of cladding elements, and the retention tube are configured to cause an anti-resonant state of the hollow core. Drawings FIG. 1 is a diagram of an example optical fiber, such as a multilayer hollow core antiresonant optical fiber. FIG. 2 is a diagram associated with an example optical fiber, such as a set of components associated with a multilayer hollow core antiresonant optical fiber. Fig. 3A and 3B are diagrams of the formation of a hollow core (such as for a hollow core antiresonant fiber). FIG. 4 is a flow chart of an example process associated with manufacturing a multilayer hollow-core antiresonant optical fiber. Detailed Description Example embodiments are described in detail below with reference to the accompanying drawings. The same reference numbers in different drawings may identify the same or similar elements. Hollow-core