Polarization-independent optical isolator core structure with glass tube

Abstract

The utility model relates to a polarization-independent optical isolator core structure with a glass tube, which comprises a magnetic block, an isolator core unit and a glass tube, the magnetic block is provided with a groove body for placing the isolator core unit, and the isolator core unit is fixed in the groove body through glue; the periphery of the bottom of the magnetic block is in a circular arc shape matched with the inner wall of the glass tube, and the magnetic block is fixedly connected into the glass tube through glue. According to the structure, automatic assembly can be achieved, assembly components are simplified, the assembly efficiency and precision are greatly improved, and therefore the machining cost is reduced, and practicability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical communication technical field, concretely relates to polarization independent type light isolator core structure with glass tube. BACKGROUND

[0002] In the optical communication field, in order to prevent the adverse effects of the return light in the optical path due to various reasons on the light source or optical path system, the light isolator is installed at the corresponding position. The function of the light isolator is to eliminate or inhibit the different degrees of light reflection generated by the optical interface in the transmission process of light from the light source to the receiver. The function of the light isolator is to pass light in the forward direction and isolate in the reverse direction, and to realize effective transmission of the optical path.

[0003] The traditional light isolator core structure needs to glue the glass crystal under the microscope according to the requirements, and preinstall it on a crystal support with a semicircular arc shape in sequence, then glue the crystal support into the magnetic ring, and then glue the magnetic ring into the glass tube. Overall, the traditional process requires long production time and high labor requirement. SUMMARY

[0004] The utility model aims at overcoming the insufficient of prior art, provides polarization independent type light isolator core structure with glass tube.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] The polarization independent type light isolator core structure with glass tube includes a magnetic block, an isolator core unit and a glass tube, the magnetic block has a groove for placing the isolator core unit, and the isolator core unit is fixed in the groove by gluing; the bottom of the magnetic block is a circular arc shape matched with the inner wall of the glass tube, and the magnetic block is fixedly connected inside the glass tube by gluing.

[0007] Further, the groove bottom surface of the magnetic block is fixedly bonded with the isolator core unit by a glue layer.

[0008] Further, the inner wall of the glass tube is fixedly bonded with the magnetic block by a glue layer.

[0009] Further, the isolator core is single-stage or double-stage, the double-stage isolator core unit includes a first-stage birefringent crystal and a second-stage birefringent crystal, the first-stage birefringent crystal includes a first left birefringent crystal and a first right birefringent crystal; the second-stage birefringent crystal includes a second left birefringent crystal and a second right birefringent crystal; a first Faraday rotator is arranged between the first left birefringent crystal and the first right birefringent crystal; a second Faraday rotator is arranged between the second left birefringent crystal and the second right birefringent crystal.

[0010] Furthermore, the magnetic block can be a symmetrical U-shape, an asymmetrical U-shape, an L-shape, or a crescent shape.

[0011] Furthermore, the magnetic block is a U-shaped magnetic block, and the isolator core unit is located on the plane in the middle of the U-shaped magnetic block.

[0012] Furthermore, the height difference between the inner isolator core unit and the edge of the U-shaped magnetic block is ≤0.2mm.

[0013] Furthermore, the magnetic block is an L-shaped magnetic block, and the isolator core unit is located on the plane in the middle of the L-shaped magnetic block.

[0014] Furthermore, the magnetic block is a crescent-shaped magnetic block, and two crescent-shaped magnetic blocks cover the isolator core unit symmetrically from top to bottom or left to right.

[0015] By adopting the above technical solution, the present invention has the following advantages compared with the prior art: the glass crystal of the isolator core can be automatically bonded to the magnetic block and solidified into the glass tube to form an optical isolator core structure with a glass tube. This structure enables automated assembly, simplifies the assembly components, greatly improves assembly efficiency and accuracy, thereby reducing processing costs and making it highly practical. Attached Figure Description

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0017] Figure 1 This is a simplified schematic diagram of the assembly of the six-piece dual-stage isolator core of this utility model;

[0018] Figure 2 This is a simplified cross-sectional diagram of the assembled six-piece dual-stage isolator core of this utility model;

[0019] Figure 3 This is a simplified side view of the isolator core of this utility model being installed inside the glass tube;

[0020] Figure 4 This is a simplified schematic diagram of the assembly method of the crescent-shaped magnetic block and the isolator core unit of this utility model. Detailed Implementation

[0021] like Figures 1-3 As shown, the polarization-independent optical isolator core structure with glass tube of this utility model includes a magnetic block 4, an isolator core unit 2 and a glass tube 5. The magnetic block 4 has a groove for placing the isolator core unit 2, and the isolator core unit 2 is fixed in the groove by adhesive. The bottom periphery of the magnetic block 4 is an arc shape that matches the inner wall of the glass tube 5, and the magnetic block 4 is fixedly connected to the inside of the glass tube 5 by adhesive.

[0022] The isolator core unit 2 can be single-stage or double-stage. The double-stage isolator core unit 2 comprises a first-stage birefringent crystal and a second-stage birefringent crystal. The first-stage birefringent crystal comprises a first left birefringent crystal 101 and a first right birefringent crystal 102. The second-stage birefringent crystal comprises a second left birefringent crystal 201 and a second right birefringent crystal 202. A first Faraday rotating plate 301 is arranged between the first left birefringent crystal 101 and the first right birefringent crystal 102. A second Faraday rotating plate 302 is arranged between the second left birefringent crystal 201 and the second right birefringent crystal 202.

[0023] The magnetic block 4 can have a magnetic field when assembled, or can be non-magnetic. After assembly, the magnetic block 4 is magnetized as a whole to have the function of the isolator core.

[0024] When manually operated, the groove depth of the magnetic block 4 is less than the height of the isolator core unit 2. When automated, the groove depth is not limited.

[0025] Of course, in automatic assembly, the groove depth of the magnetic block 4 is less than the height of the isolator core unit 2, which is also beneficial to the automatic arm clamping the glass crystal in the isolator core unit 2 and directly placing it without the clamp head touching the magnetic block 4, and the alignment can be observed from the side.

[0026] The groove bottom surface of the magnetic block 4 is bonded and fixed to the isolator core unit 2 through a glue layer. In automatic assembly, a layer of thermosetting glue can be applied to the groove bottom surface of the magnetic block 4, and thermosetting glue or ultraviolet glue can be supplemented on both sides of the groove.

[0027] The inner wall of the glass tube 5 is bonded and fixed to the magnetic block 4 through a glue layer. In automatic assembly, ultraviolet glue can be applied to the inner wall of the glass tube 5, and the magnetic block 4 can be pushed into the glass tube 5 by an automatic push rod and ultraviolet cured to realize automatic assembly of the isolator core with the glass tube 5.

[0028] The magnetic block 4 can be a symmetric U-shaped, two-end asymmetric U-shaped or L-shaped, etc.

[0029] When the magnetic block 4 is a U-shaped magnetic block, the isolator core unit 2 is on the plane in the middle of the U-shaped magnetic block. The height difference between the inner isolator core unit 4 and the edge of the U-shaped magnetic block is ≤0.2mm.

[0030] When the magnetic block 4 is an L-shaped magnetic block, the isolator core unit 2 is on the plane in the middle of the L-shaped magnetic block.

[0031] The assembling method of the utility model is that: glue is coated on the groove body of the magnetic block 4, various glass crystals in the isolator core unit 2 are picked up by the suction nozzle or the clamp of automation (mechanical arm) and directly placed into the groove body of the magnetic block 4, then the isolator core is formed by solidification, glue is applied in the glass tube 5, the isolator core is pushed into the glass tube 5 by the automatic push rod and ultraviolet curing is carried out. The whole process realizes automation and the assembly is simple.

[0032] Figure 4 The utility model discloses another half moon structure mode, the magnetic block 4 is two crescent magnetic blocks 4, and the isolator core unit 2 is clamped between the plane of two crescent magnetic blocks 4.

[0033] Two crescent magnetic blocks 4 cover the isolator core unit 2 through up-down or left-right symmetry. The magneto-optical performance of two pieces of Faraday rotator is realized.

[0034] The assembling method of the embodiment is that: glue is coated on the plane of the magnetic block 4, various glass crystals in the isolator core unit 2 are picked up by the suction nozzle or the clamp of automation and directly placed into the plane of the magnetic block 4, then the isolator core is formed by solidification, glue is applied in the glass tube, the isolator core is pushed into the glass tube 5 by the automatic push rod and ultraviolet curing is carried out.

[0035] The above describes the specific embodiment of the utility model, but the person skilled in the art should understand that this is only an example, and the person skilled in the art can make various changes or modifications to this embodiment without departing from the principles and essence of the utility model, but these changes and modifications all fall within the protection scope of the utility model.

Claims

1. A polarization-independent optical isolator core structure with a glass tube, comprising a magnetic block, an isolator core unit, and a glass tube, characterized in that: The magnetic block has a groove for placing an isolator core unit, and the isolator core unit is fixed in the groove by adhesive; the bottom periphery of the magnetic block is a circular arc shape matching the inner wall of the glass tube, and the magnetic block is fixedly connected inside the glass tube by adhesive.

2. The polarization independent glass tube optical isolator core structure of claim 1, wherein: The groove bottom surface of the magnetic block is fixed by adhesive layer and the isolator core unit.

3. The polarization independent glass tube optical isolator core structure of claim 1, wherein: The inner wall of the glass tube is fixed by adhesive layer and the magnetic block.

4. The polarization independent glass tube optical isolator core structure of claim 1, wherein: The isolator core is single-stage or double-stage, and the double-stage isolator core unit comprises a first-stage birefringent crystal and a second-stage birefringent crystal, the first-stage birefringent crystal comprises a first left birefringent crystal and a first right birefringent crystal; the second-stage birefringent crystal comprises a second left birefringent crystal and a second right birefringent crystal; a first Faraday rotating plate is arranged between the first left birefringent crystal and the first right birefringent crystal; and a second Faraday rotating plate is arranged between the second left birefringent crystal and the second right birefringent crystal.

5. The polarization independent glass tube optical isolator core structure of claim 1, wherein: The magnetic block is a symmetric U-shaped, two-end asymmetric U-shaped, L-shaped or half-moon-shaped magnetic block.

6. The polarization independent glass tube optical isolator core structure of claim 5, wherein: The magnetic block is a U-shaped magnetic block, and the isolator core unit is on the plane in the middle of the U-shaped magnetic block.

7. The polarization independent glass tube optical isolator core structure of claim 6, wherein: The height difference between the isolator core unit and the edge of the U-shaped magnetic block is less than or equal to 0.2 mm.

8. The polarization independent glass tube optical isolator core structure of claim 5, wherein: The magnetic block is an L-shaped magnetic block, and the isolator core unit is on the plane in the middle of the L-shaped magnetic block.

9. The polarization independent glass tube optical isolator core structure of claim 5, wherein: The magnetic block is a half-moon-shaped magnetic block, and two half-moon-shaped magnetic blocks cover the isolator core unit by being symmetrically arranged above and below or left and right.

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