Magnetic-Isolator Optical Isolator

Abstract

The invention relates to an anti-magnetic optical isolator, comprising an isolation core tube, an isolator inner sealing tube and an isolator outer sealing tube. The inner wall of the isolator inner sealing tube is inlaid with a magnetic ring, which is sleeved with the isolation core tube; both ends of the isolator outer sealing tube are provided with external fixed tubes, the insides of the two external fixed tubes are respectively threaded with an input alignment plug and an output alignment plug, the input alignment plug and the output alignment plug are both provided with alignment unit needles, and the two alignment unit needles are horizontally arranged corresponding to both ends of the isolation core tube; the outer sleeve of the alignment unit needle is sleeved with an airbag sealing plug, the airbag sealing plug is sleeved with the isolator inner sealing tube, the inner ends of the input alignment plug and the output alignment plug are both provided with a compression gasket, the compression gasket is matched with the airbag sealing plug and is pressed, the inside of the airbag sealing plug is filled with inert gas, an anti-magnetic coil is provided between the two external fixed tubes, and the anti-magnetic coil is wound around the surface of the isolator outer sealing tube. The design has good anti-magnetic effect and is not easily disturbed by external magnetic fields.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber communication, and in particular to an anti-magnetic optical isolator. Background Art

[0002] In laser systems, the reflection of the light source by the optical elements in the optical path often has an adverse effect on the system. In order to solve this problem, it is possible to consider inserting an optical passive device that allows unidirectional light to pass through. Based on the working principle of the Faraday effect of magneto-optical crystals, an optical isolator is added to the system optical path. Optical isolators have been widely used in optical communications. For example, the optical signal generated by a semiconductor laser must be able to pass through a silicon optical isolator and then be sent to the receiving end. However, the reflected light reflected from the receiving end must be isolated by the silicon optical isolator to prevent the reflected light from causing the oscillation characteristics of the semiconductor laser to deteriorate.

[0003] When the existing optical isolator is in use, it is very easy to be disturbed by the external magnetic field. The magnetic field strength received by the internal magneto-optical crystal is inconsistent with the expectation, which greatly affects the isolation effect of the optical isolator on the optical signal and affects the use of the optical isolator. Summary of the invention

[0004] The purpose of the present invention is to provide a magnetic-resistant optical isolator in view of the above shortcomings.

[0005] The solution adopted by the present invention to solve the technical problem is an anti-magnetic optical isolator, comprising an isolation core tube, an isolator inner sealing tube, and an isolator outer sealing tube arranged in sequence from the inside to the outside, wherein the inner wall of the isolator inner sealing tube is inlaid with a magnetic ring, and the magnetic ring is sleeved with the isolation core tube;

[0006] Both ends of the isolator outer sealing tube are provided with external fixing tubes, and the two external fixing tubes are respectively threadedly connected with an input alignment plug and an output alignment plug, and the input alignment plug and the output alignment plug are both provided with alignment unit needles, and the two alignment unit needles are horizontally arranged corresponding to both ends of the isolation core tube;

[0007] The outer sleeve of the alignment unit needle is provided with an airbag sealing plug, which is sleeved with the sealing tube inside the isolator. The inner ends of the input alignment plug and the output alignment plug are provided with compression washers, which are matched and compressed with the airbag sealing plug, and the airbag sealing plug is filled with inert gas.

[0008] An anti-magnetic coil is arranged between the two outer fixed tubes, and the anti-magnetic coil is wound around the surface of the outer sealing tube of the isolator.

[0009] Furthermore, an input optical fiber is provided at the outer end of the input collimation plug, and the input optical fiber is fixedly connected to the collimation unit needle on the input collimation plug; an output optical fiber is provided at the outer end of the output collimation plug, and the output optical fiber is fixedly connected to the collimation unit needle on the output collimation plug.

[0010] Furthermore, the anti-magnetic winding ring is made of elastic rubber material, and the interior of the anti-magnetic winding ring is coated with a sodium chloride filler layer.

[0011] Furthermore, the anti-magnetic coil is in the shape of a ring with an opening, and connecting strips are fixedly provided at both ends of the anti-magnetic coil. The two connecting strips are bonded by a rubber strip, and the connecting strip and the rubber strip are coaxially arranged with the outer sealing tube of the isolator.

[0012] Furthermore, a lower protective shell is sleeved on the bottom of the isolator outer sealing tube, and an upper protective shell is sleeved on the top of the isolator outer sealing tube, and one side of the lower protective shell is hinged to one side of the upper protective shell.

[0013] Furthermore, fixed pages are provided at both ends of the other side of the lower protective shell, the outer ends of the fixed pages are provided with mounting holes, and the inner end surfaces of the fixed pages are fixedly provided with connecting slots, and the other side of the upper protective shell is provided with connecting plugs that can match and plug into the connecting slots.

[0014] Furthermore, the surface of the connecting plug is fixedly provided with limiting teeth.

[0015] Compared with the prior art, the present invention has the following beneficial effects: simple structure, reasonable design, good anti-magnetic effect, and solves the problem that the optical isolator is easily disturbed by the external magnetic field when in use, and the magnetic field strength received by the internal magneto-optical crystal is inconsistent with the expectation, which greatly affects the isolation effect of the optical isolator on the optical signal and affects the use of the optical isolator. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below in conjunction with the accompanying drawings.

[0017] Figure 1 Schematic diagram of the structure of the anti-magnetic optical isolator.

[0018] Figure 2 It is a structural cross-sectional view of a magnetic-resistant optical isolator equipped with a protective shell.

[0019] Figure 3 It is a schematic diagram of the structure of the airbag sealing plug.

[0020] Figure 4 It is a schematic diagram of the side cross-sectional structure of the anti-magnetic coil.

[0021] Figure 5 Schematic diagram of the structure of the input straight plug.

[0022] Figure 6 Schematic diagram of the structure of the output straight plug.

[0023] Figure 7 A schematic diagram of the structure of the protective shell.

[0024] In the figure: 1. isolator outer sealing tube; 2. isolator inner sealing tube; 3. isolation core tube; 4. magnetic ring; 5. external fixing tube; 6. input alignment plug; 7. output alignment plug; 8. alignment unit needle; 9. airbag sealing plug; 10. compression gasket; 11. anti-magnetic coil; 12. input optical fiber; 13. output optical fiber; 14. sodium chloride filler layer; 15. connecting strip; 16. adhesive strip; 17. lower protective shell; 18. upper protective shell; 19. fixing page; 20. mounting hole; 21. connecting slot; 22. connecting plug; 23. limit tooth. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] like Figure 1-7 As shown, an anti-magnetic optical isolator comprises an isolation core tube, an isolator inner sealing tube, and an isolator outer sealing tube arranged in sequence from the inside to the outside, wherein the inner wall of the isolator inner sealing tube is inlaid with a magnetic ring, the magnetic ring is sleeved with the isolation core tube, the isolator outer sealing tube, the isolator inner sealing tube cooperate with the isolation core tube to form an optical isolator, and the magnetic ring provides the magnetic force required by the magneto-optical crystal to the isolation core tube;

[0027] Both ends of the isolator outer sealing tube are provided with external fixing tubes, and the two external fixing tubes are respectively threadedly connected with an input alignment plug and an output alignment plug, and the input alignment plug and the output alignment plug are both provided with alignment unit needles, and the two alignment unit needles are horizontally arranged corresponding to both ends of the isolation core tube, and the input alignment plug and the output alignment plug are installed so that the alignment unit needles are aligned with the isolation core tube to form a one-way path for light, thereby realizing the use of the optical isolator;

[0028] The collimation unit needle is sleeved with an airbag sealing plug on the outside, and the airbag sealing plug is sleeved with the sealing tube in the isolator. The inner ends of the input collimation plug and the output collimation plug are both provided with compression washers, and the compression washers are matched with the airbag sealing plug for compression. The airbag sealing plug is filled with inert gas, and the airbag sealing plug protects the collimation unit needle, thereby improving the stability of the collimation unit needle. The compression washers are used to compress the airbag sealing plug to seal the sealing tube in the isolator. The inert gas has stable chemical properties and has little effect on the magnetic field inside the optical isolator, thereby improving the antimagnetic effect of the optical isolator.

[0029] An anti-magnetic coil is arranged between the two outer fixed tubes, and the anti-magnetic coil is wound around the surface of the outer sealing tube of the isolator.

[0030] In this embodiment, an input optical fiber is provided at the outer end of the input collimation plug, and the input optical fiber is fixedly connected to the collimation unit needle on the input collimation plug, the input optical fiber realizes the input of light, the collimation unit needle is aligned with the isolation core tube, and the light passes through the optical isolator; an output optical fiber is provided at the outer end of the output collimation plug, and the output optical fiber is fixedly connected to the collimation unit needle on the output collimation plug, the output optical fiber realizes the output of light, the collimation unit needle is aligned with the isolation core tube, and the light passes out of the optical isolator.

[0031] In this embodiment, the anti-magnetic coil is made of elastic rubber material, and the interior of the anti-magnetic coil is coated with a sodium chloride filler layer. The anti-magnetic coil made of elastic rubber material is easy to be coated on the outer sealing tube of the isolator. The organic compound has a good anti-magnetic effect, which improves the anti-magnetic effect of the optical isolator.

[0032] In this embodiment, the anti-magnetic coil is in the shape of a circular ring with an opening, and connecting strips are fixedly provided at both ends of the anti-magnetic coil. The two connecting strips are bonded together by rubber strips so that the anti-magnetic coil is closed and wrapped around the surface of the outer sealing tube of the isolator. The connecting strip and the rubber strip are coaxially arranged with the outer sealing tube of the isolator.

[0033] In this embodiment, a lower protective shell is provided at the bottom of the isolator outer sealing tube, and an upper protective shell is provided at the top of the isolator outer sealing tube. One side of the lower protective shell is hinged to one side of the upper protective shell. The lower protective shell and the upper protective shell seal and protect the outside of the isolator outer sealing tube to prevent damage to the anti-magnetic coil and to avoid affecting the use of the optical isolator.

[0034] In this embodiment, fixed pages are provided at both ends of the other side of the lower protective shell, and mounting holes are provided at the outer ends of the fixed pages, which facilitate the installation and fixation of the optical isolator. A connecting card slot is fixedly provided on the inner end surface of the fixed page, and a connecting plug that can be matched and plugged with the connecting card slot is provided on the other side of the upper protective shell.

[0035] In this embodiment, a limiting latch tooth is fixedly provided on the surface of the connecting plug-in piece, and the limiting latch tooth realizes the one-way insertion of the connecting plug-in piece to prevent the connecting plug-in piece from being separated from the connecting slot.

[0036] If this patent discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connected by bolts or screws), or as: a non-detachable fixed connection (for example, riveting, welding). Of course, the fixed connection can also be replaced by an integrated structure (for example, manufactured by a casting process) (except when it is obviously impossible to use an integrated forming process).

[0037] In the description of this patent, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0038] The preferred embodiments listed above further illustrate the objectives, technical solutions and advantages of the present invention in detail. It should be understood that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-magnetic optical isolator, characterized in that: It includes an isolation core tube, an isolator inner sealing tube, and an isolator outer sealing tube which are arranged in sequence from the inside to the outside. The inner wall of the isolator inner sealing tube is inlaid with a magnetic ring, and the magnetic ring is sleeved with the isolation core tube; Both ends of the isolator outer sealing tube are provided with external fixing tubes, and the two external fixing tubes are respectively threadedly connected with an input alignment plug and an output alignment plug, and the input alignment plug and the output alignment plug are both provided with alignment unit needles, and the two alignment unit needles are horizontally arranged corresponding to both ends of the isolation core tube; The outer sleeve of the alignment unit needle is provided with an airbag sealing plug, which is sleeved with the sealing tube inside the isolator. The inner ends of the input alignment plug and the output alignment plug are provided with compression washers, which are matched and compressed with the airbag sealing plug, and the airbag sealing plug is filled with inert gas. An anti-magnetic coil is arranged between the two outer fixed tubes, and the anti-magnetic coil is wound around the surface of the outer sealing tube of the isolator; The anti-magnetic coil is made of elastic rubber material, and a sodium chloride filler layer is coated inside the anti-magnetic coil; the anti-magnetic coil is in the shape of a circular ring with an opening, and connecting strips are fixedly arranged at both ends of the anti-magnetic coil, and the two connecting strips are bonded by a rubber strip, and the connecting strip and the rubber strip are coaxially arranged with the outer sealing tube of the isolator.

2. The anti-magnetic optical isolator according to claim 1, characterized in that: An input optical fiber is disposed at the outer end of the input collimation plug, and the input optical fiber is fixedly connected to the collimation unit needle on the input collimation plug; an output optical fiber is disposed at the outer end of the output collimation plug, and the output optical fiber is fixedly connected to the collimation unit needle on the output collimation plug.

3. The anti-magnetic optical isolator according to claim 1, characterized in that: A lower protective shell is sleeved on the bottom of the isolator outer sealing tube, and an upper protective shell is sleeved on the top of the isolator outer sealing tube. One side of the lower protective shell is hinged to one side of the upper protective shell.

4. The anti-magnetic optical isolator according to claim 3, characterized in that: The other two ends of the lower protective shell are provided with fixed pages, the outer ends of the fixed pages are provided with mounting holes, the inner end surfaces of the fixed pages are fixedly provided with connecting slots, and the other side of the upper protective shell is provided with connecting plugs that can match and plug into the connecting slots.

5. The anti-magnetic optical isolator according to claim 4, characterized in that: The surface of the connecting plug is fixedly provided with limit locking teeth.

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