Method for manufacturing supporting type hollow-core anti-resonance optical fiber

Abstract

The invention provides a method for manufacturing a supporting type hollow-core anti-resonance optical fiber. The method comprises the following specific steps of: firstly, selecting a quartz glass (SiO2) tube as a material for manufacturing an outer cladding layer and an inner cladding layer of the hollow-core anti-resonance optical fiber, and respectively drawing innermost-layer anti-resonance glass tubes, central glass tubes, supporting glass tubes and outer cladding layer glass tubes which are different in size and quantity; selecting the innermost anti-resonance glass tubes, supporting glass tubes and central glass tubes so as to assemble inner cladding anti-resonance units; then annularly and uniformly arranging the inner cladding anti-resonance units on the inner wall of the outer cladding glass tubes to assemble a complete preform; and finally, preparing an intermediate, drawing the intermediate into the hollow-core anti-resonance optical fiber, and applying a protective layer on the surface of the optical fiber. The leakage loss of the drawn hollow-core anti-resonance optical fiber on the communication wave band is lower than 0.1 dB / km, effective single-mode transmission can be achieved, the problems of collapse, deformation and the like of the cladding anti-resonance capillary tubes are solved, and the structure of the cladding anti-resonance tubes is more reliable.

Description

technical field

[0001] The invention relates to the technical field of photonic crystal fibers, in particular to a method for making a supported hollow-core anti-resonance fiber. Background technique

[0002] Compared with the traditional optical fiber guiding light to propagate in the glass core, the hollow-core photonic crystal fiber makes the light be confined in the air core for propagation, which improves the damage threshold of the optical fiber. Hollow-core fibers can be divided into photonic bandgap fibers, Kagome fibers, and hollow-core antiresonant fibers. Compared with the other two types of hollow-core fibers, anti-resonant hollow-core fibers have a simpler structure, more flexible design, lower transmission loss and better single-mode characteristics, and have become a hot spot in fiber research.

[0003] By changing or optimizing the structure of the anti-resonance hollow-core fiber, reducing the limiting loss and increasing the bandwidth, the anti-resonance p...

Examples

Embodiment 1

[0065] S1, select a quartz glass tube with a refractive index of 1.45 (SiO 2 ) as the material for making the outer cladding and inner cladding of the hollow-core anti-resonant optical fiber, and the innermost anti-resonant glass tubes, central glass tubes, supporting glass tubes and outer cladding glass tubes of different sizes and quantities are drawn respectively:

[0066] S11. Fabricate the innermost anti-resonant glass tube with a radius of 3750 μm and a thickness of 40 μm:

[0067] S111. Determine the radius d of the innermost anti-resonant capillary 3 according to the parameters such as the core diameter, the tube spacing and the number of tubes 1 , the specific expression is as follows:

[0068]

[0069] In the formula, Dc is the diameter of the core area 2, and the value of Dc is 35 μm, g 1 is the tube gap between two adjacent innermost anti-resonance capillaries 3, g 1 The value is taken as 2.7 μm, and N is the number of tubes4.

[0070] S112. The specific exp...

Embodiment 2

[0091] S1, select a quartz glass tube with a refractive index of 1.45 (SiO 2 ) as the material for making the outer cladding and inner cladding of the hollow-core anti-resonant optical fiber, and the innermost anti-resonant glass tubes, central glass tubes, supporting glass tubes and outer cladding glass tubes of different sizes and quantities are drawn respectively:

[0092]S11. Fabricate the innermost anti-resonant glass tube with a radius of 2150 μm and a thickness of 40 μm:

[0093] S111. Determine the radius d of the innermost anti-resonant capillary 3 according to the parameters such as the core diameter, the tube spacing and the number of tubes 1 , the specific expression is as follows:

[0094]

[0095] In the formula, Dc is the diameter of the core area 2, and the value of Dc is 35 μm, g 1 is the tube gap between two adjacent innermost anti-resonance capillaries 3, g 1 The value is 2.7 μm, and N is the number of tubes 5.

[0096] S112. The specific expression o...

Embodiment 3

[0116] S1, select a quartz glass tube with a refractive index of 1.45 (SiO 2 ) as the material for making the outer cladding and inner cladding of the hollow-core anti-resonant optical fiber, and the innermost anti-resonant glass tubes, central glass tubes, support glass tubes, flat glass rods and outer cladding glass tubes are drawn out in different sizes and quantities :

[0117] S11. Fabricate the innermost anti-resonant glass tube with a radius of 3750 μm and a thickness of 40 μm:

[0118] S111. Determine the radius d of the innermost anti-resonant capillary 3 according to the parameters such as the core diameter, the tube spacing and the number of tubes 1 , the specific expression is as follows:

[0119]

[0120] In the formula, Dc is the diameter of the core area 2, and the value of Dc is 35 μm, g 1 is the tube gap between two adjacent innermost anti-resonance capillaries 3, g 1 The value is 2.7 μm, and N is the number of tubes.

[0121] S112. The specific expres...

technical field

[0001] The invention relates to the technical field of photonic crystal fibers, in particular to a method for making a supported hollow-core anti-resonance fiber. Background technique

[0002] Compared with the traditional optical fiber guiding light to propagate in the glass core, the hollow-core photonic crystal fiber makes the light be confined in the air core for propagation, which improves the damage threshold of the optical fiber. Hollow-core fibers can be divided into photonic bandgap fibers, Kagome fibers, and hollow-core antiresonant fibers. Compared with the other two types of hollow-core fibers, anti-resonant hollow-core fibers have a simpler structure, more flexible design, lower transmission loss and better single-mode characteristics, and have become a hot spot in fiber research.

[0003] By changing or optimizing the structure of the anti-resonance hollow-core fiber, reducing the limiting loss and increasing the bandwidth, the anti-resonance p...

Examples

Embodiment 1

[0065] S1, select a quartz glass tube with a refractive index of 1.45 (SiO 2 ) as the material for making the outer cladding and inner cladding of the hollow-core anti-resonant optical fiber, and the innermost anti-resonant glass tubes, central glass tubes, supporting glass tubes and outer cladding glass tubes of different sizes and quantities are drawn respectively:

[0066] S11. Fabricate the innermost anti-resonant glass tube with a radius of 3750 μm and a thickness of 40 μm:

[0067] S111. Determine the radius d of the innermost anti-resonant capillary 3 according to the parameters such as the core diameter, the tube spacing and the number of tubes 1 , the specific expression is as follows:

[0068]

[0069] In the formula, Dc is the diameter of the core area 2, and the value of Dc is 35 μm, g 1 is the tube gap between two adjacent innermost anti-resonance capillaries 3, g 1 The value is taken as 2.7 μm, and N is the number of tubes4.

[0070] S112. The specific exp...

Embodiment 2

[0091] S1, select a quartz glass tube with a refractive index of 1.45 (SiO 2 ) as the material for making the outer cladding and inner cladding of the hollow-core anti-resonant optical fiber, and the innermost anti-resonant glass tubes, central glass tubes, supporting glass tubes and outer cladding glass tubes of different sizes and quantities are drawn respectively:

[0092]S11. Fabricate the innermost anti-resonant glass tube with a radius of 2150 μm and a thickness of 40 μm:

[0093] S111. Determine the radius d of the innermost anti-resonant capillary 3 according to the parameters such as the core diameter, the tube spacing and the number of tubes 1 , the specific expression is as follows:

[0094]

[0095] In the formula, Dc is the diameter of the core area 2, and the value of Dc is 35 μm, g 1 is the tube gap between two adjacent innermost anti-resonance capillaries 3, g 1 The value is 2.7 μm, and N is the number of tubes 5.

[0096] S112. The specific expression o...

Embodiment 3

[0116] S1, select a quartz glass tube with a refractive index of 1.45 (SiO 2 ) as the material for making the outer cladding and inner cladding of the hollow-core anti-resonant optical fiber, and the innermost anti-resonant glass tubes, central glass tubes, support glass tubes, flat glass rods and outer cladding glass tubes are drawn out in different sizes and quantities :

[0117] S11. Fabricate the innermost anti-resonant glass tube with a radius of 3750 μm and a thickness of 40 μm:

[0118] S111. Determine the radius d of the innermost anti-resonant capillary 3 according to the parameters such as the core diameter, the tube spacing and the number of tubes 1 , the specific expression is as follows:

[0119]

[0120] In the formula, Dc is the diameter of the core area 2, and the value of Dc is 35 μm, g 1 is the tube gap between two adjacent innermost anti-resonance capillaries 3, g 1 The value is 2.7 μm, and N is the number of tubes.

[0121] S112. The specific expres...

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