CN102096210A - Faraday optoisolator used in wide band - Google Patents
Faraday optoisolator used in wide band Download PDFInfo
- Publication number
- CN102096210A CN102096210A CN201010555089XA CN201010555089A CN102096210A CN 102096210 A CN102096210 A CN 102096210A CN 201010555089X A CN201010555089X A CN 201010555089XA CN 201010555089 A CN201010555089 A CN 201010555089A CN 102096210 A CN102096210 A CN 102096210A
- Authority
- CN
- China
- Prior art keywords
- magneto
- optical crystal
- faraday
- optoisolator
- annular permanent
- 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.)
- Pending
Links
Images
Landscapes
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention relates to a Faraday optoisolator used in a wide band, which comprises a pair of polarizers and a Faraday rotator arranged between the two polarizers, wherein the two polarizers form an angle of 45 degrees; the Faraday rotator comprises a magneto-optical crystal and two annular permanent magnets; two ends of the magneto-optical crystal are respectively bonded with a total reflection prism, and the peripheries of the magneto-optical crystal and the total reflection prisms are provided with an outer metal bracket; the periphery of the outer metal bracket is provided with the two annular permanent magnets; the two annular permanent magnets are respectively arranged in a magnet fixing sleeve; the edge of the magnet fixing sleeve is connected with the outer metal bracket through a thread; and the magneto-optical crystal and the total reflection prisms are bonded together by adopting an optical cement or gluing mode. In the invention, the interval between the two magnets can be changed through rotating the magnet fixing sleeves at two ends so as to change the magnetic field intensity applied to the magneto-optical crystal and achieve the purpose of modulating light of different wavelengths.
Description
[technical field]
The invention belongs to laser device field, specifically be meant faraday's optoisolator that a kind of broadband is used.
[background technology]
Optoisolator is an a kind of optical passive component that allows the light one-way transmission, in the occasion of the isolated return light of needs, have a wide range of applications, for example multistage laser amplifier, optical parametric oscillator, ring laser, Erbium-Doped Fiber Amplifier, seed injection laser, photoswitch, photomodulator, optical circulator etc.Optoisolator is harmless the passing through of forward light that light polarization direction deflection that the Faraday effect by magneto-optical crystal realizes realizes, and then isolated backlight reaches application target.
Faraday effect is meant when linearly polarized light is propagated in medium, if add a high-intensity magnetic field on the direction of propagation of light being parallel to, then optical vibration direction will deflect, the orientation independent that optical vibration direction and light are propagated, deflection angle θ is directly proportional with the product that magnetic induction density B and light pass through the length L of medium
Be θ=VBL
Wherein scale-up factor V is called Verdet constant, and is relevant with medium character and frequency of light wave.Wherein with square relation of being inversely proportional to of optical wavelength.
Traditional optoisolator generally is made of faraday's optical rotator and polarizer, wherein faraday's optical rotator is the critical component that constitutes optoisolator, as shown in Figure 1, traditional faraday's optoisolator, employing is in magneto-optical crystal 101 ' skin parcel annular permanent-magnet body 102 ' provide axial magnetic field, the axial magnetic field intensity of annular permanent magnet 101 ' provide is immutable, therefore can only produce fixed angle deflection to the incident light polarization face, can only allow the light of fixed wave length to pass through.
[summary of the invention]
Technical matters to be solved by this invention is to provide a kind of faraday's optoisolator of broadband use.
The present invention solves the problems of the technologies described above by the following technical solutions:
Faraday's optoisolator that a kind of broadband is used comprises a pair of polarizer and is located at Faraday rotator between described two polarizers; Described two polarizers are 45; Described Faraday rotator comprises a magneto-optical crystal, two annular permanent magnets; Described magneto-optical crystal two ends are bonded with a total reflection prism respectively, and described magneto-optical crystal and total reflection prism periphery are provided with the metal support arm; Described metal support arm outer periphery has described two annular permanent magnets; Described two annular permanent magnets are installed in the magnet fixed muffle; The edge of described magnet fixed muffle and described metal support arm are by being threaded.
Described annular permanent magnet adopts neodymium iron boron, SmCo, ferritic a kind of material wherein to make.
Described magneto-optical crystal adopts wherein a kind of material of TGG, YIG, magneto-optic glass to make.
Adopt optical cement or gummed mode to bond together between described magneto-optical crystal and the described total reflection prism.
The invention has the advantages that: the magnet fixed muffle by the rotation two ends can change two gaps between the magnet, thereby change the magnetic field intensity that acts on the magneto-optical crystal, by formula θ=VBL as can be known when magnetic field intensity B changes, polarization angle also can change, thereby reaches the purpose of modulation different wavelengths of light.
[description of drawings]
The invention will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is a prior art faraday optical rotator cut-open view.
Fig. 2 is faraday's optoisolator cut-open view of the present invention.
[embodiment]
See also shown in Figure 2ly, faraday's optoisolator that a kind of broadband is used comprises into a pair of polarizer 201,202 and Faraday rotator that 45 degree are placed, and Faraday rotator comprises a magneto-optical crystal 101, two annular permanent magnets 102,103; Described magneto-optical crystal 101 two ends are bonded with a total reflection prism 104,105 respectively, and described magneto-optical crystal 101 and total reflection prism 104,105 peripheries are provided with metal support arm 106; Described metal support arm 106 outer periphery have described two annular permanent magnets 102,103; Described two annular permanent magnets 104,105 are installed in the magnet fixed muffle 107; The edge of described magnet fixed muffle 107 is connected by screw thread 108 with described metal support arm 106.
Described annular permanent magnet 102,103 can adopt neodymium iron boron, SmCo, ferritic a kind of material wherein to make.
Described magneto-optical crystal 101 can adopt wherein a kind of material of TGG, YIG, magneto-optic glass to make.
Adopt optical cement or gummed mode to bond together between described magneto-optical crystal 101 and the described total reflection prism 104,105.
Adopt faraday's optoisolator of above structure, light beam from first total reflection prism 104 incident after 45 degree enter the magneto-optical crystal 101 after the total reflections reflects away by second total reflection prism 105 again, about two magnets 102,103 can provide along the light path direction of propagation evenly and the stronger magnetic field of intensity, by rotary magnet fixed muffle 107, can adjust the gap of 102,103 of two magnets, thereby the magnetic field intensity of corrective action on magneto-optical crystal 101 reaches the purpose of adjusting different light beam wave band polarization angles.
The present invention can change gap between two magnets 102,103 by the magnet fixed muffle 107 at rotation two ends, thereby change the magnetic field intensity that acts on the magneto-optical crystal 101, by formula θ=VBL as can be known when magnetic field intensity B changes, polarization angle also can change, thereby reaches the purpose of modulation different wavelengths of light.
Claims (4)
1. faraday's optoisolator of using of a broadband comprises a pair of polarizer and is located at Faraday rotator between described two polarizers; Described two polarizers are 45; Described Faraday rotator comprises a magneto-optical crystal, two annular permanent magnets; It is characterized in that: described magneto-optical crystal two ends are bonded with a total reflection prism respectively, and described magneto-optical crystal and total reflection prism periphery are provided with the metal support arm; Described metal support arm outer periphery has described two annular permanent magnets; Described two annular permanent magnets are installed in the magnet fixed muffle; The edge of described magnet fixed muffle and described metal support arm are by being threaded.
2. faraday's optoisolator that a kind of broadband as claimed in claim 1 is used is characterized in that: described annular permanent magnet adopts neodymium iron boron, SmCo, ferritic a kind of material wherein to make.
3. faraday's optoisolator that a kind of broadband as claimed in claim 1 is used is characterized in that: described magneto-optical crystal adopts wherein a kind of material of TGG, YIG, magneto-optic glass to make.
4. faraday's optoisolator that a kind of broadband as claimed in claim 1 is used is characterized in that: adopt optical cement or gummed mode to bond together between described magneto-optical crystal and the described total reflection prism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010555089XA CN102096210A (en) | 2010-11-22 | 2010-11-22 | Faraday optoisolator used in wide band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010555089XA CN102096210A (en) | 2010-11-22 | 2010-11-22 | Faraday optoisolator used in wide band |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102096210A true CN102096210A (en) | 2011-06-15 |
Family
ID=44129372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010555089XA Pending CN102096210A (en) | 2010-11-22 | 2010-11-22 | Faraday optoisolator used in wide band |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102096210A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103293602A (en) * | 2012-02-27 | 2013-09-11 | 中国科学院物理研究所 | Optoisolator |
| CN103869418A (en) * | 2014-03-04 | 2014-06-18 | 青岛海泰光电技术有限公司 | Broadband-spectrum high-damage-threshold optical isolator |
| CN105247405A (en) * | 2013-04-01 | 2016-01-13 | 信越化学工业株式会社 | Faraday rotator and light isolator using faraday rotator |
| CN103869418B (en) * | 2014-03-04 | 2016-11-30 | 青岛海泰光电技术有限公司 | A kind of wide spectrum high damage threshold optoisolator |
| CN113991412A (en) * | 2021-09-15 | 2022-01-28 | 中国科学院福建物质结构研究所 | Intermediate infrared Q-switched laser based on YIG magneto-optical crystal |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5528415A (en) * | 1994-11-09 | 1996-06-18 | Duke University | Compact enhanced performance optical isolator using a faraday rotator |
| CN1160212A (en) * | 1996-03-01 | 1997-09-24 | 富士通株式会社 | Variable optical attenuator which applies magnetic field to faraday element to rotate polarization of light signal |
| CN2298532Y (en) * | 1997-04-15 | 1998-11-25 | 中国科学院物理研究所 | Optical attenuator capable of continuous change |
-
2010
- 2010-11-22 CN CN201010555089XA patent/CN102096210A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5528415A (en) * | 1994-11-09 | 1996-06-18 | Duke University | Compact enhanced performance optical isolator using a faraday rotator |
| CN1160212A (en) * | 1996-03-01 | 1997-09-24 | 富士通株式会社 | Variable optical attenuator which applies magnetic field to faraday element to rotate polarization of light signal |
| CN2298532Y (en) * | 1997-04-15 | 1998-11-25 | 中国科学院物理研究所 | Optical attenuator capable of continuous change |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103293602A (en) * | 2012-02-27 | 2013-09-11 | 中国科学院物理研究所 | Optoisolator |
| CN105247405A (en) * | 2013-04-01 | 2016-01-13 | 信越化学工业株式会社 | Faraday rotator and light isolator using faraday rotator |
| CN103869418A (en) * | 2014-03-04 | 2014-06-18 | 青岛海泰光电技术有限公司 | Broadband-spectrum high-damage-threshold optical isolator |
| CN103869418B (en) * | 2014-03-04 | 2016-11-30 | 青岛海泰光电技术有限公司 | A kind of wide spectrum high damage threshold optoisolator |
| CN113991412A (en) * | 2021-09-15 | 2022-01-28 | 中国科学院福建物质结构研究所 | Intermediate infrared Q-switched laser based on YIG magneto-optical crystal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2012697C (en) | Optical isolator | |
| CN102096210A (en) | Faraday optoisolator used in wide band | |
| CN101900892A (en) | Wavelength tunable opto-isolator | |
| CN104820298B (en) | A kind of TM TE magneto-optic modulators based on BiLuIG films | |
| CN201780423U (en) | Faraday optical rotator capable of adjusting used bands | |
| KR100425366B1 (en) | Optical signal transmission system and magneto-optical modulator designed to establish modulation over wide range for use in the same | |
| US20130120824A1 (en) | Reflection type variable optical attenuator | |
| CN110095842A (en) | All-optical intensity modulator based on Crossed Circle resonant cavity | |
| CN208421455U (en) | A kind of isolator device of multichannel | |
| CN202351332U (en) | Electro-optical sensitive unit for electric field measurement | |
| Kumari | A comprehensive study of magneto-optic materials and its applications | |
| US10962813B2 (en) | Optical isolator module | |
| US7002732B2 (en) | Magneto-optical devices | |
| JP2009168894A (en) | Optical isolator | |
| CN102279478A (en) | Optical isolator | |
| CN200986641Y (en) | Integrated optical fiber polarization rotary device | |
| CN101872077A (en) | Optoisolator for use in fiber-optic communication | |
| CN102314002B (en) | Polarization controller | |
| CN202041741U (en) | Optical rotator for broadband | |
| de Alcantara | Optical propagation in magneto-optical materials | |
| RU167200U1 (en) | MAGNETO-OPTICAL LIGHT INTENSITY MODULATOR | |
| CN208297874U (en) | A kind of electro-optical attenuator | |
| JPS59165020A (en) | Optical isolator device | |
| CN110108310A (en) | Interference type optical fiber sensor high-frequency phase generates carrier wave loading device | |
| CN1209659C (en) | Atomic steam magneto-optical modulator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110615 |