CN203520707U - Faraday effect experimental device - Google Patents
Faraday effect experimental device Download PDFInfo
- Publication number
- CN203520707U CN203520707U CN201320563467.8U CN201320563467U CN203520707U CN 203520707 U CN203520707 U CN 203520707U CN 201320563467 U CN201320563467 U CN 201320563467U CN 203520707 U CN203520707 U CN 203520707U
- Authority
- CN
- China
- Prior art keywords
- faraday
- crystal
- polarizer
- effect experimental
- light source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000000694 effects Effects 0.000 title claims abstract 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract 9
- 239000013078 crystal Substances 0.000 claims abstract 6
- 230000005674 electromagnetic induction Effects 0.000 claims abstract 4
- 229910052742 iron Inorganic materials 0.000 claims 3
- 238000004804 winding Methods 0.000 claims 2
- CPBQJMYROZQQJC-UHFFFAOYSA-N helium neon Chemical group [He].[Ne] CPBQJMYROZQQJC-UHFFFAOYSA-N 0.000 claims 1
- 230000011218 segmentation Effects 0.000 claims 1
- 230000010287 polarization Effects 0.000 abstract 2
Images
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
The utility model relates to the technical field of physical experimental facilities and especially relates to a Faraday effect experimental device. The Faraday effect experimental device includes a laser light source, a polarizer, a polarization analyzer and a photoelectric detector mounted on a platform successively. A Faraday electromagnetic induction mechanism is arranged between the polarizer and the polarization analyzer. The Faraday effect experimental device is characterized in that the Faraday electromagnetic induction mechanism is mainly composed of a coil frame, a Faraday crystal, a coil lead and a magnetic armco iron frame. The coil lead is coiled on the coil frame. The center of the coil frame is provided with a cylindrical hole. The Faraday crystal is installed on the cylindrical hole. The coil frame is arranged between a left clamping tool and a right clamping tool in the magnetic armco iron frame. The magnetic armco iron frame is provided with a light through hole. Centers of the light through hole and the Faraday crystal are on the same axis.
Description
Technical field
The utility model relates to Physical Experiment equipment technical field, relates in particular to a kind of Faraday effect experimental provision.
Background technology
Faraday is when the contact of exploring between electromagnet phenomenon and optical phenomena, found a kind of phenomenon: when a branch of linearly polarized light passes medium, if in medium, the direction of propagation along light adds a magnetic field, will observe light and turn over an angle through sample rear polarizer face, that is magnetic field makes medium have optical activity, this phenomenon was just called Faraday effect afterwards.
Faraday effect is permitted many-sided application, and it can be used as the means of structure of matter research, and as in the research of semiconductor physics, it can be used for measuring the effective mass of carrying pond and the knowledge that band structure is provided; Particularly, in laser technology, utilize the characteristic of Faraday effect, made light wave isolator or single-pass device.In addition,, in the technology such as laser communications, laser radar, optical frequency circulator based on Faraday effect, modulator etc. have also been applied.
When magnetic field is not while being very strong, the angle θ that in Faraday effect, plane of polarization turns over, is directly proportional to magnetic induction density B and dielectric thickness L along dielectric thickness magnetic field that direction adds,
Wherein
be called Verdet constant.
In the process of experiment, in maintenance light-path, beam diameter size in faraday's crystal is constant, and all even stablizing of the magnetic field intensity at faraday's crystal place are very important.
Existing experimental provision, multiplex is greatly all that continuous spectrum light source adds monochromator generation monochromatic light, and its collimation is poor, and in crystal, its beam size is inconsistent.The optical direction two ends that are mostly crystal produce magnetic field with two hot-wire coils, and because crystal is outside coil, the magnetic field intensity of crystals is inhomogeneous; When crystal positions is moved, crystals magnetic field changes; Inhomogeneous due to magnetic field, while measuring magnetic field, pops one's head in when different with crystal present position, and the result of measurement is deviation to some extent.The angle of the polarizer and analyzer is obtained, and is by the scale on index dial, and human eye carries out reading, and error is larger.
Utility model content
The purpose of this utility model is to overcome the deficiency of above-mentioned technology, and provide a kind of Faraday effect experimental provision, can keep in light-path beam diameter size in faraday's crystal constant, make faraday's crystal in equal even stable magnetic field, thereby reduce the error of net result.
The utility model for achieving the above object, by the following technical solutions: a kind of Faraday effect experimental provision, comprise the light source being arranged on successively on platform, the polarizer, analyzer and photodetector, between the described polarizer and analyzer, be provided with faraday's electromagnetic induction mechanism, described faraday's electromagnetic induction mechanism is mainly by coil former, faraday's crystal, winding wire and magnetic conduction electrical pure iron are configured to, described winding wire is wrapped on described coil former, in the middle of described coil former, have cylindrical hole, described faraday's crystal is arranged in described cylindrical hole, described coil former is arranged in the middle of the left and right jig in the middle of described magnetic conduction electrical pure iron frame, described magnetic conduction electrical pure iron frame is provided with light hole, the center of described light hole and faraday's crystal is on same axis.
Described light source is LASER Light Source, and described LASER Light Source is helium-neon laser, power 1.5mW.
The described polarizer, analyzer are polaroid or Glan prism, and it is driven by the stepper motor with segmentation device.
Described photodetector connects a digital display device, shows in real time current light intensity value.
The beneficial effects of the utility model are: the utility model adopts LASER Light Source, and collimation is good, and in light-path, beam diameter size in faraday's crystal is constant; The utility model adopts the stepper motor of band segmentation device to drive the polarizer, analyzer, and its precision can reach 0.0375 °, and reproducible; The utility model is placed on crystal the inside of coil former, winding around on coil former, thus the magnetic field intensity that coil is produced is uniform and stable, and in the situation that crystal positions is moved, crystals magnetic field can not change yet, and has improved the precision of measuring.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of faraday's electromagnetic induction mechanism in the utility model;
In figure: 1, LASER Light Source; 2, the polarizer; 3, faraday's electromagnetic induction mechanism; 4, analyzer; 5, photodetector; 6, the stepper motor of band segmentation device; 7, coil former; 8, faraday's crystal; 9, winding wire; 10, magnetic conduction electrical pure iron frame; 11, light hole.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, describe embodiment of the present utility model in detail.As shown in the figure, a kind of Faraday effect experimental provision, comprise the LASER Light Source 1, the polarizer 2, analyzer 4 and the photodetector 5 that are arranged on successively on platform, the described polarizer and analyzer are driven by the stepper motor 6 with segmentation device, are provided with faraday's electromagnetic induction mechanism 3 between the described polarizer and analyzer.
In the utility model, described faraday's electromagnetic induction mechanism is mainly by coil former 7, faraday's crystal 8, winding wire 9 and magnetic conduction electrical pure iron frame 10 form, described winding wire is wrapped on described coil former, in the middle of described coil former, have cylindrical hole, described faraday's crystal is arranged in described cylindrical hole, described coil former is arranged in the middle of the left and right jig in the middle of described magnetic conduction electrical pure iron frame, described magnetic conduction electrical pure iron frame is provided with light hole 11, the center of described light hole and faraday's crystal is on same axis, monochromatic light is radiated on faraday's crystal through light hole.
In the utility model, described LASER Light Source is helium-neon laser, power 1.5mW, and the described polarizer, analyzer are polaroid or Glan prism, it is driven by the stepper motor with segmentation device.Described photodetector connects a digital display device, shows in real time current light intensity value.
With laser instrument, produce the laser of high collimation, then produce linearly polarized light by the polarizer, linearly polarized light passes through faraday's crystal, then by analyzer, beats on photodetector by photodetector detected energy.First by stepper motor, drive analyzer to make its position the delustring state of energy minimum in photodetector, be detected, then by hot-wire coil, on crystal, produced magnetic field, linearly polarized light is under the effect of Faraday effect, its polarization direction produces deflection, at this moment need analyzer to turn over again certain angle, could again make system in delustring state.The angle that now can be rotated by analyzer obtains the rotation angle that Faraday effect produces.
Use of the present utility modelly when measuring faraday's performance characteristic experimental provision and measure with faraday's crystal and coil, connect LASER Light Source 1, by the polarizer 2, produce linearly polarized lights.11 dozens of light transmission light holes add electric current at farad to winding wire, and the magnetic fields of its generation is on faraday's crystal 8.Due to Faraday effect, the polarization direction of linearly polarized light deflects, and the angle of its deflection can detect by analyzer and photodetector.And then can complete the Verdet constant of measuring faraday's crystal, the experiments such as simulation magneto-optic communication.
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (4)
1. a Faraday effect experimental provision, comprise the light source being arranged on successively on platform, the polarizer, analyzer and photodetector, between the described polarizer and analyzer, be provided with faraday's electromagnetic induction mechanism, it is characterized in that: described faraday's electromagnetic induction mechanism is mainly by coil former, faraday's crystal, winding wire and magnetic conduction electrical pure iron are configured to, described winding wire is wrapped on described coil former, in the middle of described coil former, have cylindrical hole, described faraday's crystal is arranged in described cylindrical hole, described coil former is arranged in the middle of the left and right jig in the middle of described magnetic conduction electrical pure iron frame, described magnetic conduction electrical pure iron frame is provided with light hole, the center of described light hole and faraday's crystal is on same axis.
2. Faraday effect experimental provision according to claim 1, is characterized in that: described light source is LASER Light Source, and described LASER Light Source is helium-neon laser, power 1.5mW.
3. Faraday effect experimental provision according to claim 2, is characterized in that: the described polarizer, analyzer are polaroid or Glan prism, and it is driven by the stepper motor with segmentation device.
4. according to the Faraday effect experimental provision described in claim 1 or 2 or 3, it is characterized in that: described photodetector connects a digital display device, shows in real time current light intensity value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320563467.8U CN203520707U (en) | 2013-09-11 | 2013-09-11 | Faraday effect experimental device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320563467.8U CN203520707U (en) | 2013-09-11 | 2013-09-11 | Faraday effect experimental device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203520707U true CN203520707U (en) | 2014-04-02 |
Family
ID=50379601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320563467.8U Expired - Fee Related CN203520707U (en) | 2013-09-11 | 2013-09-11 | Faraday effect experimental device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203520707U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103456206A (en) * | 2013-09-11 | 2013-12-18 | 天津港东科技发展股份有限公司 | Faraday effect experimental device |
| CN105515659A (en) * | 2015-12-01 | 2016-04-20 | 浙江工业大学 | Channel control device and method of duplex visible light communication system |
-
2013
- 2013-09-11 CN CN201320563467.8U patent/CN203520707U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103456206A (en) * | 2013-09-11 | 2013-12-18 | 天津港东科技发展股份有限公司 | Faraday effect experimental device |
| CN105515659A (en) * | 2015-12-01 | 2016-04-20 | 浙江工业大学 | Channel control device and method of duplex visible light communication system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106526277B (en) | A kind of Novel light path sensing unit for low pressure optical current sensor | |
| CN107643438A (en) | Optical current sensor and its current measuring method based on Faraday magnetooptical effect | |
| CN104569622A (en) | Efficient microwave polarization detection device based on photonic spin Hall effect | |
| CN104316777A (en) | Electric field strength measurement system based on Pockels effect | |
| CN105486962A (en) | Electric light crystal half-wave electric field and corresponding characteristic measuring apparatus and method | |
| JP2009229459A (en) | Microelectromechanical current sensing apparatus | |
| CN106597053A (en) | Straight optical path linear optical current sensor and current detection method | |
| CN103454726B (en) | A kind of method for making of quarter-wave plate | |
| CN105675039A (en) | Method for calibrating any peak delay amount of photoelastic modulator | |
| CN203520707U (en) | Faraday effect experimental device | |
| CN103456206A (en) | Faraday effect experimental device | |
| CN103913298B (en) | A kind of apparatus and method measuring highly nonlinear optical fiber Verdet constant | |
| CN102121872B (en) | System for analyzing polarization characteristics of full-automatic optical fiber | |
| CN102680408B (en) | Magnetic Circular Dichroism Photoconductivity Spectroscopy Measurement System | |
| CN102654450B (en) | System for synchronously measuring polar magneto-optic Kerr spectrum and magnetic circular dichroism spectrum | |
| CN105607297A (en) | Terahertz polarization electro-optical modulation device based on DAST crystals and method | |
| CN205353238U (en) | Electro -optical crystal half -wave electric field and response characteristic measuring device | |
| CN205027805U (en) | Photoelectric type alternating current -direct current voltage sensor based on pockels effect | |
| CN202330527U (en) | Optical electric field sensor | |
| Wu et al. | Research on all-fiber dual-modulation optic current sensor based on real-time temperature compensation | |
| KR100662744B1 (en) | Optical high current / high voltage sensor | |
| CN211180014U (en) | Portable optical fiber user electric energy quality detection and analysis device | |
| GB1194982A (en) | Device for the Measurement of an Electrical Current Flowing in an Aerial High-Voltage Conductor | |
| CN201281724Y (en) | Optical current sensor | |
| CN205484007U (en) | Verdet constant measuring device of magneto optic material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 300384 EF two unit, G block, Xinmao science and Technology Park, Huayuan Industrial Area, Nankai District, Tianjin. Patentee after: TIANJIN GANGDONG TECHNOLOGY CO.,LTD. Address before: 300384 EF two unit, G block, Xinmao science and Technology Park, Huayuan Industrial Area, Nankai District, Tianjin. Patentee before: TIANJIN GANGDONG SCIENCE & TECHNOLOGY DEVELOPMENT Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20210911 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |