Double-core single-hole optical fiber

Abstract

The utility model provides a double-core single-hole optical fiber, which comprises an optical fiber body, the optical fiber body comprises a first fiber core and a second fiber core, the outer sides of the first fiber core and the second fiber core are respectively coated with a first cladding and a second cladding, and the inner side of the first cladding is provided with an air hole corresponding to the top of the first fiber core. The first fiber core and the second fiber core can be wrapped by the first wrapping layer and the second wrapping layer respectively, the first wrapping layer and the second wrapping layer are isolated through the coating layer, mutual influence between the first fiber core and the second fiber core is avoided, meanwhile, the first fiber core can be limited through the supporting frame and the supporting legs, and therefore the stability of the optical fiber is improved. The stability of the first fiber core is improved; through the reinforcing frame, the reinforcing ribs, the first connecting rod and the second connecting rod, protection on the first fiber core and the second fiber core can be enhanced, so that the safety of the first fiber core and the second fiber core is improved, the strength of the optical fiber body can be improved, and the practicability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to double -core optical fiber technical field, concretely is a double -core single -hole optical fiber. BACKGROUND

[0002] Double -core optical fiber is the core in the same cladding setting has two cores, namely a double -core optical fiber integrates two single -core optical fibers. Most double -core optical fibers are based on the coupling effect between the two cores of double -core optical fiber, make high -performance all -fiber coupling type filter, can also be used for optical fiber sensor, such as temperature sensor, stress sensor etc.

[0003] In prior art, because two cores are arranged in the inside of the same cladding simultaneously, therefore the mutual influence between the two cores is easy to occur, and the air hole arranged in the double -core optical fiber does not set up the supporting mechanism, so that the air hole is easy to be influenced mutually between the core, causes the wire core to move in the air hole, low practicability.

[0004] Therefore, the utility model provides a double -core single -hole optical fiber. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of prior art, the utility model aims at providing a double -core single -hole optical fiber to solve the problems in the background art, the utility model can be coated to the first core and the second core by setting the first cladding and the second cladding, and the first cladding and the second cladding are isolated by coating layer, avoid the mutual influence between the first core and the second core, and the first core is positioned by the support frame and the support leg, thereby improving the stability of the first core.

[0006] In order to realize the above-mentioned purpose, the utility model is through the following technical scheme to realize: a double -core single -hole optical fiber, including optical fiber body, the optical fiber body includes first core and second core, the outside of the first core and the second core is coated with first cladding and second cladding respectively, the inside of the first cladding is opened with air hole corresponding to the top of the first core, the inside of the air hole is fixed with support frame corresponding to the top of the first core, the coating layer is set between the first cladding and the second cladding, the inside of the optical fiber body is set with reinforcing mechanism corresponding to the outside of the coating layer.

[0007] Further, the first core and the second core are parallelly arranged on the top and the bottom of the inside of the optical fiber body, and the first core and the second core are both high refractive index glass cores.

[0008] Further, the support frame is in the shape of a Chinese character, and support legs are symmetrically fixed to the bottom of the support frame.

[0009] Further, the support leg is arranged at the top of the first core, and a gap is arranged between the support leg and the first core.

[0010] Further, the gap is filled with a high-thermal-optical-coefficient liquid between the inside of the gap and the first core, and one end of the support leg is in contact with the inner wall of the air hole.

[0011] Further, the reinforcing mechanism comprises a reinforcing frame and a reinforcing rib, the reinforcing frame is in the shape of an "8" character, and the reinforcing frame is fixedly arranged on the outside of the coating layer.

[0012] Further, the reinforcing frame is fixedly arranged with a protective layer on the outside, and the reinforcing rib is fixedly arranged symmetrically in the inside of both ends of the protective layer.

[0013] Further, the reinforcing rib is symmetrically arranged at both sides of the bottom end of the reinforcing frame, and the first connecting rod and the second connecting rod are fixedly arranged between the reinforcing rib and both ends of the reinforcing frame.

[0014] The beneficial effects of the present application are as follows: the first core and the second core can be coated respectively by arranging the first cladding layer and the second cladding layer, and the first cladding layer and the second cladding layer are isolated by the coating layer, so as to avoid mutual influence between the first core and the second core, and the first core can be limited by the support frame and the support leg, thereby improving the stability of the first core; the first core and the second core can be protected by the reinforcing frame, the reinforcing rib, the first connecting rod and the second connecting rod, thereby improving the safety of the first core and the second core, and the strength of the optical fiber body can be improved, and the practicability is high. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a structure diagram of the double-core single-hole optical fiber of the present application;

[0016] Fig. 2 It is a sectional view of the double-core single-hole optical fiber of the present application;

[0017] Fig. 3 It is a reinforcing rib structure diagram of the double-core single-hole optical fiber of the present application;

[0018] In the figure: 1, optical fiber body; 2, protective layer; 3, first core; 4, first cladding layer; 5, air hole; 6, support frame; 7, coating layer; 8, reinforcing frame; 9, second core; 10, second cladding layer; 11, reinforcing rib; 12, first connecting rod; 13, second connecting rod. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application will be further described in conjunction with the specific embodiments.

[0020] Please refer to Figs. 1 to 3 The utility model provides a technical scheme: a kind of double-core single-hole optical fiber, including optical fiber body 1, the optical fiber body 1 includes first fiber core 3 and second fiber core 9, the outside of first fiber core 3 and second fiber core 9 is respectively covered with first cladding layer 4 and second cladding layer 10, the inside of first cladding layer 4 is opened with air hole 5 corresponding to the top of first fiber core 3, the inside of air hole 5 is fixed with support frame 6 corresponding to the top of first fiber core 3, coating layer 7 is arranged between first cladding layer 4 and second cladding layer 10, the outside of coating layer 7 in the inside of optical fiber body 1 is provided with reinforcing mechanism, first cladding layer 4 and second cladding layer 10 can be isolated by coating layer 7, to avoid mutual influence between first fiber core 3 and second fiber core 9;The support frame 6 of setting can support air hole 5, and increase the protection of first fiber core 3, and high practicability.

[0021] In the embodiment, the first fiber core 3 and the second fiber core 9 are arranged in parallel on the top and the bottom of the inside of the optical fiber body 1, and the first fiber core 3 and the second fiber core 9 are both high-refractive glass cores, which can fix the distance between the first fiber core 3 and the second fiber core 9 and facilitate the propagation of light through the high-refractive glass core.

[0022] In the embodiment, the support frame 6 is in the shape of a Chinese character, and support legs are symmetrically fixed on both sides of the bottom of the support frame 6, the support legs are arranged on the top of the first fiber core 3, and gaps are arranged between the support legs and the first fiber core 3, the gaps are filled with high-thermal-optical-coefficient liquid, one end of the support leg is in contact with the inner wall of the air hole 5, and the support frame 6 and the support leg can support the air hole 5, and the support leg can limit the first fiber core 3, thereby improving the stability of the first fiber core 3, and the refractive index of the high-thermal-optical-coefficient liquid can change with temperature, thereby facilitating temperature measurement and being convenient for use in an optical fiber temperature sensor.

[0023] In the embodiment, the reinforcing mechanism includes a reinforcing frame 8 and reinforcing ribs 11, the reinforcing frame 8 is in the shape of an Chinese character, the reinforcing frame 8 is fixed on the outside of the coating layer 7, a protective layer 2 is fixed on the outside of the reinforcing frame 8, the reinforcing ribs 11 are symmetrically fixed in the inside of both ends of the protective layer 2, the reinforcing ribs 11 are symmetrically arranged on both sides of the bottom end of the reinforcing frame 8, and first connecting rods 12 and second connecting rods 13 are fixed between the reinforcing ribs 11 and both ends of the reinforcing frame 8, the first fiber core 3 and the second fiber core 9 can be reinforced by the reinforcing frame 8, and the protection of the first fiber core 3 and the second fiber core 9 is increased, and the strength of the optical fiber can be improved by the cooperation of the reinforcing ribs 11, the first connecting rods 12, the second connecting rods 13 and the reinforcing frame 8.

[0024] In use of the dual-core single-hole optical fiber, the first cladding 4 and the second cladding 10 can respectively coat the first core 3 and the second core 9, and the first cladding 4 and the second cladding 10 are isolated by the coating layer 7 to avoid mutual influence between the first core 3 and the second core 9, and to ensure that the first core 3 and the second core 9 can propagate light. The support frame 6 and the support leg are arranged inside the air hole 5, which can support the air hole 5 through the support frame 6 and the support leg, prevent the air hole 5 from being compressed to affect the first core 3, and the support leg can limit the first core 3, thereby improving the stability of the first core 3. The air hole 5 is filled with a high-thermal-coefficient liquid, which changes its refractive index according to the change of temperature, thereby affecting the effective refractive index of the first core 3, changing the optical path of the first core 3, and generating an optical path difference between the first core 3 and the second core 9, which facilitates temperature measurement and is used in the optical fiber temperature sensor. The reinforcing frame 8, the reinforcing rib 11, the first connecting rod 12 and the second connecting rod 13 can increase the protection of the first core 3 and the second core 9, thereby improving the safety of the first core 3 and the second core 9, and the strength of the optical fiber body 1, and the practicability is high.

[0025] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A dual core single aperture optical fiber comprising an optical fiber body (1), characterized in that, The optical fiber body (1) comprises a first fiber core (3) and a second fiber core (9); the outer sides of the first fiber core (3) and the second fiber core (9) are respectively covered with a first cladding (4) and a second cladding (10); an air hole (5) is provided on the inner side of the first cladding (4) corresponding to the top of the first fiber core (3); a support frame (6) is fixedly provided inside the air hole (5) corresponding to the top of the first fiber core (3); a coating layer (7) is provided between the first cladding (4) and the second cladding (10); and a reinforcement mechanism is provided inside the optical fiber body (1) corresponding to the outer side of the coating layer (7).

2. A dual core single aperture optical fiber according to claim 1, characterized in that: The first fiber core (3) and the second fiber core (9) are arranged in parallel at the top and bottom of the inner side of the optical fiber body (1); the first fiber core (3) and the second fiber core (9) are both high-refractive-index glass fiber cores.

3. A dual core single aperture optical fiber according to claim 1, wherein: The support frame (6) is in the shape of a straight line, and support legs are symmetrically fixedly provided on both sides of the bottom of the support frame (6).

4. A dual core single aperture optical fibre according to claim 3, characterised in that: The support leg is arranged on the top of the first fiber core (3), and a gap is arranged between the support leg and the first fiber core (3).

5. A dual core single aperture optical fibre according to claim 4, characterised in that: The space between the interior of the gap and the first fiber core (3) is filled with a high thermo-optical coefficient liquid, and one end of the support leg is in contact with the inner wall of the air hole (5).

6. A dual core single aperture optical fiber according to claim 1, wherein: The reinforcement mechanism comprises a reinforcement frame (8) and a reinforcement rib (11); the reinforcement frame (8) is in the shape of an "8"; the reinforcement frame (8) is fixedly arranged on the outside of the coating layer (7).

7. A dual core single aperture optical fibre according to claim 6, characterised in that: A protective layer (2) is fixedly provided on the outer side of the reinforcement frame (8), and the reinforcing ribs (11) are symmetrically fixedly provided inside the two ends of the protective layer (2).

8. A dual core single aperture optical fibre according to claim 7, characterised in that: The reinforcing ribs (11) are symmetrically arranged on both sides of the bottom end of the reinforcing frame (8), and a first connecting rod (12) and a second connecting rod (13) are fixedly arranged between the reinforcing ribs (11) and the two ends of the reinforcing frame (8).

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