CN210626816U

CN210626816U - Novel Faraday optical rotator

Info

Publication number: CN210626816U
Application number: CN201922032735.3U
Authority: CN
Inventors: 李林虎
Original assignee: Sichuan Sun Earth Communication Technology Co ltd
Current assignee: Sichuan Sun Earth Communication Technology Co ltd
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-05-26
Anticipated expiration: 2029-11-22

Abstract

The utility model discloses a novel Faraday optical rotator for the magnetic field force of solving among the prior art permanent magnet influences optical rotator result of use along with temperature variation, and its structure includes: the light beam deflects in the shell, the adjusting rod is arranged on one pair of edges of the filter, supports the filter and can adjust the angle of the filter and the angle of the filter through rotation, the magnet part is positioned outside a magneto-optical material, and light waves rotate under the action of a magnetic field based on a Faraday optical rotation effect; the utility model discloses an use the electro-magnet to replace traditional magnet, avoided in the use magnet to receive the temperature influence and the problem that magnetic force changed.

Description

Novel Faraday optical rotator

Technical Field

The utility model belongs to the technical field of the light passive device, concretely relates to novel Faraday optical rotator.

Background

In physics, the faraday rotation effect refers to: when linearly polarized waves propagate in a plasma along a magnetic field direction, a polarization plane of electromagnetic waves continuously rotates in the magnetized plasma by taking a forward direction as an axis, a Faraday rotation effect is a magneto-optical effect and is an interaction between an optical wave and a magnetic field in a medium, and a deflection angle is equal to a direct ratio of a product of magnetic induction line strength and the length of light passing through the medium.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a novel Faraday optical rotator for the magnetic field force of permanent magnet changes along with temperature variation among the solution prior art, and then influences the problem of optical rotator result of use.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a novel Faraday optical rotator, includes filter, the magneto-optical material in casing and the casing, be fixed with the regulation pole on the mid point on two limits about the filter, it includes to adjust the pole: the filter comprises a rotating section, a fastening section and a manual nut, wherein the rotating section is arranged at the middle point of the bottom edge of the filter, a pit for placing the rotating section is formed in the inner wall of a shell, the rotating section is inserted into the pit, one end of the fastening section is fixed at the middle point of the top surface of the filter, the other end of the fastening section penetrates through the shell and is positioned outside the shell, the connecting line of the fastening section and the rotating section is a straight line perpendicular to the horizontal plane, a section of thread is arranged in the middle of the fastening section, the position of the fastening section, which is in contact with the shell, is positioned on the thread, the fastening section is further sleeved with the manual nut, and the manual nut is positioned.

Further, the shell is of a double-layer structure, and negative pressure is pumped between the two layers.

Furthermore, the magneto-optical material is fixed on a fixed block positioned at the geometric centers of the upper surface and the lower surface of the magneto-optical material, and the fixed block is connected with the inner wall of the shell.

Furthermore, one end of the fastening section, which is positioned outside, is provided with an adjusting sheet, and the adjusting sheet is a circular sheet with the area larger than the section radius of the fastening section.

Further, a magnet portion is also included, the magnet portion including: the heat-conducting device comprises a magnetic ring, fins and a heat-conducting film, wherein the magnetic ring is an electromagnet wound with a coil, the fins are fixed on the outer annular surface of the magnetic ring facing outwards and are metal sheets arranged obliquely, and the heat-conducting film is fixed on the side surface of the magnetic ring and extends outwards to cover the outer surface of the shell.

The utility model discloses following beneficial effect has at least:

(1) the filter is fixed in the casing through adjusting the pole, conveniently adjusts the angle of filter.

(2) The magneto-optical material is fixed through the fixed block and does not contact with the inner wall of the shell, and the shell is a double-layer inner wall, so that radiation of external heat to the inside of the shell can be reduced.

(3) The magnet adopts the electro-magnet, and the magnetic field of production is more stable, adopts fin isotructure to increase heat radiating area simultaneously, avoids the temperature to conduct in the casing.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.

In the drawings:

fig. 1 schematically shows a schematic structural view of the present invention;

FIG. 2 schematically shows a schematic view of the structure of part A of FIG. 1;

wherein the figures include the following reference numerals:

1-shell, 11-filter, 12-magneto-optical material, 13-fixed block, 14-inlet optical cable, 15-outlet optical cable, 21-rotating section, 22-fastening section, 23-manual nut, 24-adjusting sheet, 31-magnetic ring, 32-fin, 33-heat transfer film and 34-lead.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure; unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application; as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "above … …, above," "overlying" and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures; it will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

Examples

As shown in figures 1-2, the novel Faraday optical rotator is used for solving the problem that the magnetic field of a permanent magnet influences the use effect of the optical rotator along with the temperature change in the prior art, and the Faraday optical rotator structurally comprises: the shell 1, adjust the pole, the magnet part, light takes place to deflect in the shell 1, it sets up at 11 a pair of edges of wave filter to adjust the pole, support it and can be through the angle of rotating adjustment wave filter 11, the magnet part is located outside magneto-optical material 12, based on the Faraday optical rotation effect, the light wave takes place to rotate under the effect in magnetic field, the magnet is the electro-magnet, the magnet surface is provided with fin 32 and covers there is heat transfer film 33, in order to increase heat radiating area, improve heat exchange efficiency, help the heat dissipation of magnet in the use.

The casing 1 is a hollow cuboid structure, for convenience of description, two faces of the casing 1 with the smallest area are referred to as bottom faces, and the remaining four faces are referred to as side faces, as shown in fig. 1, the two bottom faces of the casing 1 are respectively communicated with an inlet optical cable 14 and an outlet optical cable 15, in this embodiment, the optical cable on the left side is referred to as the inlet optical cable 14, the optical cable on the right side is referred to as the outlet optical cable 15, light enters the casing 1 through the inlet optical cable 14 and then leaves the casing 1 through the outlet optical cable 15, in the casing 1, the filter 11, the magneto-optical material 12 and the filter 11 are sequentially arranged along the light moving direction, and the grid directions of the two filters have a certain angle, which is a mature prior art and will not be described in detail: the filter 11 and the adjusting rod are fixed on the middle points of the upper edge and the lower edge of the filter 11, so that the adjusting rod can be rotated to adjust the angle of the filter 11 and the filter 11, the magneto-optical material 12 is not directly fixed on the inner wall of the shell 1, but fixed on the fixed block 13 positioned at the geometric center of the upper surface and the lower surface of the magneto-optical material 12, the fixed block 13 is connected with the inner wall of the shell 1, the magneto-optical material 12 is fixed, the magneto-optical material 12 is not directly contacted with the inner wall of the shell 1, and radiation of outside temperature to the.

It should be noted that: the shell 1 is of a double-layer structure, negative pressure is pumped between the two layers, and radiation of external heat to the inside of the shell 1 is further reduced.

The regulation pole includes: the filter comprises a rotating section 21, a fastening section 22 and a manual nut 23, wherein an adjusting rod is arranged on the filter 11 and can be used for fixing the rotating section 21 and the filter and adjusting the angle of the rotating section 21 more conveniently, the rotating section 21 of the adjusting rod is vertically fixed at the middle point of the bottom edge of the filter 11, a pit for placing the rotating section 21 is arranged at the corresponding position of the inner wall of the shell 1, the rotating section 21 is inserted into the pit and can not change the position easily and can rotate in the pit, one end of the fastening section 22 of the adjusting rod is vertically fixed at the middle point of the top surface of the filter 11, the connecting line of the fastening section 22 and the rotating section 21 is a straight line vertical to the horizontal plane, as shown in figure 2, the fastening section 22 penetrates through the shell 1, the other end of the fastening section is positioned outside the shell 1, a section of thread is arranged in the middle of the fastening section, the screw thread of the inner side of the manual nut 23 is matched with the screw thread on the fastening section 22, so that the filter 11 can be fixed in the shell 1 by rotating the manual nut 23, and when the angle of the filter 11 needs to be adjusted, the manual nut 23 can be loosened to adjust, and the operation is more convenient.

It is worth noting that: the end of the fastening section 22 located outside is provided with an adjusting sheet 24, and the adjusting sheet 24 is a circular sheet with an area larger than the section radius of the fastening section 22, so that the hand-held device can conveniently carry out angle adjustment.

The magnet portion is fixed in position outside the housing 1 in correspondence of the magneto-optical material 12, as shown in fig. 1, and comprises: the magnetic ring 31 is an electromagnet wound with a coil, and is electrically connected with an external power supply through the wire 34, and the electromagnet is magnetic after being electrified, the electromagnet is a magnetic field generated by current movement, and is different from a magnetic field generation mode of a traditional permanent magnet, the traditional permanent magnet generates a magnetic field according to a unique crystal structure of the traditional permanent magnet, the generation of the magnetic field is easily influenced by external temperature, the higher the temperature is, the smaller the magnetic field force is, so that the use effect of the optical converter can be directly influenced, the electromagnet can ensure the stability of the magnetic field only by controlling the constancy of current due to different magnetic field generation mechanisms, and when the electromagnet is used, the magnetic ring 31 can be further connected with a current stabilizer circuit, so that the stability of the magnetic field generated when the magnetic ring 31 works is ensured.

It is worth noting that: the magnetic ring 31 is not directly fixed on the surface of the shell 1, and a connecting ring is arranged between the magnetic ring 31 and the shell 1, so that heat generated in the use process of the electromagnet is prevented from directly acting on the surface of the shell 1.

The fins 32 are fixed on the outward outer ring surface of the magnetic ring 31 and are aluminum sheets arranged obliquely, the inclination angle is 10-45 degrees, the fins 32 are in contact with the magnetic ring 31, the heat dissipation area of the magnetic ring 31 is increased, a heat transfer film 33 is further arranged on the side surface of the magnetic ring 31, the heat transfer film 33 is fixed on the side surface of the magnetic ring 31 and extends outwards to cover the outer surface of the shell 1, and the heat transfer film 33 has certain elasticity, so that the magnetic ring 31 can rotate a small amount conveniently.

As a preferred embodiment, the heat transfer film is a graphene film.

As a preferred embodiment, the connecting ring and the fixing block are made of rubber materials, so that the heat insulation performance is good, and the heat transfer is reduced.

In a preferred embodiment, the magneto-optical material is a terbium gallium garnet crystal.

In this embodiment, the magnetic ring, the current stabilizer, the heat transfer film and the lead wire are all mature prior art and can be purchased directly, so detailed description is omitted.

Claims

1. A novel Faraday optical rotator comprises a shell, a filter in the shell, and magneto-optical materials, and is characterized in that: an adjusting rod is fixed on the middle point of the upper edge and the lower edge of the filter, and the adjusting rod comprises: the filter comprises a rotating section, a fastening section and a manual nut, wherein the rotating section is arranged at the middle point of the bottom edge of the filter, a pit for placing the rotating section is formed in the inner wall of a shell, the rotating section is inserted into the pit, one end of the fastening section is fixed at the middle point of the top surface of the filter, the other end of the fastening section penetrates through the shell and is positioned outside the shell, the connecting line of the fastening section and the rotating section is a straight line perpendicular to the horizontal plane, a section of thread is arranged in the middle of the fastening section, the position of the fastening section, which is in contact with the shell, is positioned on the thread, the fastening section is further sleeved with the manual nut, and the manual nut is positioned.

2. A novel faraday optical rotator in accordance with claim 1 wherein: the shell is of a double-layer structure, and negative pressure is pumped between the two layers.

3. A novel faraday optical rotator in accordance with claim 1 wherein: the magneto-optical material is fixed on a fixed block positioned at the geometric centers of the upper surface and the lower surface of the magneto-optical material, and the fixed block is connected with the inner wall of the shell.

4. A novel faraday optical rotator in accordance with claim 1 wherein: and one end of the fastening section, which is positioned outside, is provided with an adjusting sheet, and the adjusting sheet is a circular sheet with the area larger than the section radius of the fastening section.

5. A novel faraday optical rotator in accordance with claim 1 wherein: further comprising a magnet portion, the magnet portion comprising: the heat-conducting device comprises a magnetic ring, fins and a heat-conducting film, wherein the magnetic ring is an electromagnet wound with a coil, the fins are fixed on the outer annular surface of the magnetic ring facing outwards and are metal sheets arranged obliquely, and the heat-conducting film is fixed on the side surface of the magnetic ring and extends outwards to cover the outer surface of the shell.