CN2253487Y - Full optical fiber optical isolator - Google Patents
Full optical fiber optical isolator Download PDFInfo
- Publication number
- CN2253487Y CN2253487Y CN 95237306 CN95237306U CN2253487Y CN 2253487 Y CN2253487 Y CN 2253487Y CN 95237306 CN95237306 CN 95237306 CN 95237306 U CN95237306 U CN 95237306U CN 2253487 Y CN2253487 Y CN 2253487Y
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- China
- Prior art keywords
- optical fiber
- optical
- arch
- utility
- model
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- 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
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Abstract
The utility model discloses a full optical fiber optical isolator, which is composed of two optical fiber polarizers 1, 3, an optical fiber faraday rotator 2 and an optical fiber 4. The utility model is characterized in that the structures of the two fiber polarizers 1, 3 are that the optical fiber 4 forms an arch shape in a base plate 7, an arch top part is horizontally cut off and the thickness which is cut off does not exceed the diameter of the optical fiber. The cross section of the arch part of the optical fiber is provided with a medium film 8 provided with a metal film 9. The optical fiber 4 passes through the two optical fiber polarizers 1, 3 and the optical fiber faraday rotator 2. The utility model has the characteristics of simple structure, high reliability, little loss, etc. The utility model can be used for various optical instruments.
Description
The utility model relates to a kind of optical device, the unidirectional optical transmission apparatus of especially a kind of full optical fiber.
Traditional optical isolator is made of polarizer and a faraday rotator of two discrete components, need in light path, to add and collimate and make light beam reenter the GRIN Lens system of optical fiber the optical fiber emergent light, this isolation elements is many, loss greatly, poor reliability, enforcement complexity.A kind of improved optical isolator is the polarizer that replaces discrete component with winding-type optical fiber, it is processed into collimation and the coupling that lens shape is realized light beam with the two ends of faraday crystal, though this isolator has reduced the discrete component number, but still there is a coupling link of the optical fiber and the element of most fragile in the light path, loss is still bigger, and reliability is not high.
The purpose of this utility model provides a kind of full-optical fiber optical isolator, it has realized the full fiberize of optical isolator light path, have simple in structure, characteristics such as components and parts are few, reliability is high, loss is minimum, shock resistance, can be widely used in occasions such as various optical instruments, optical measuring apparatus.
Implementation of the present utility model is, it is made up of two fibre optic polarizers, optical fiber faraday rotator and optical fiber, it is characterized in that: the structure of two fibre optic polarizers all is that optical fiber is the top that arch and level cut arch in substrate, the thickness that cuts is no more than the diameter of optical fiber, one layer dielectric is arranged on the tangent plane at optical fiber arch place, layer of metal film is arranged on the deielectric-coating; Optical fiber passes two fibre optic polarizers and optical fiber faraday rotator.
Below with reference to accompanying drawing the utility model is further described.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is that fibre optic polarizer AA ' is to profile.
With reference to Fig. 1, optical fiber faraday rotator 2 is connected between two fibre optic polarizers 1,3, and optical fiber 4 runs through optical fiber faraday rotator 2 and two fibre optic polarizers 1,3, and optical fiber faraday rotator 2 and two fibre optic polarizers 1,3 are installed on the installation sheet 5.Optical fiber faraday rotator 2 adopts a cylindrical superpower permanet magnetic body, and there is a fluting 6 centre, and optical fiber 4 embeds in the fluting 6.It is the free of birefringence single-mode fiber of circle symmetry that optical fiber 4 preferably adopts core, and its operation wavelength is then decided according to concrete request for utilization.The length that changes optical fiber faraday rotator 2 makes its faraday rotation to the light polarization face be preferably 45 ℃.
With reference to Fig. 1, Fig. 2, fibre optic polarizer 1 and fibre optic polarizer 3 structures are identical, and its concrete form is that optical fiber 4 is the top that arch and level cut arch in substrate 7, and the thickness that cuts is no more than the diameter of optical fiber, is preferably the radius of optical fiber.On the tangent plane at optical fiber arch place, be coated with a layer dielectric 8, be coated with layer of metal film 9 on the deielectric-coating 8.During realization, can open an arc groove on substrate 7, optical fiber 4 embeds wherein, and level cuts the top at optical fiber 4 arch places, plates deielectric-coating 8 and metal film 9 again.
Claims (1)
1, a kind of full-optical fiber optical isolator, it is by two fibre optic polarizers 1,3, optical fiber faraday rotator 2 and optical fiber 4 are formed, it is characterized in that: the structure of two fibre optic polarizers 1,3 all is that optical fiber 4 is the top that arch and level cut arch in substrate 7, the thickness that cuts is no more than the diameter of optical fiber 4, one layer dielectric 8 is arranged on the tangent plane at optical fiber 4 arch places, layer of metal film 9 is arranged on the deielectric-coating 8; Optical fiber 4 passes two fibre optic polarizers 1,3 and optical fiber faraday rotator 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95237306 CN2253487Y (en) | 1995-07-28 | 1995-07-28 | Full optical fiber optical isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95237306 CN2253487Y (en) | 1995-07-28 | 1995-07-28 | Full optical fiber optical isolator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2253487Y true CN2253487Y (en) | 1997-04-30 |
Family
ID=33880070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95237306 Expired - Fee Related CN2253487Y (en) | 1995-07-28 | 1995-07-28 | Full optical fiber optical isolator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2253487Y (en) |
-
1995
- 1995-07-28 CN CN 95237306 patent/CN2253487Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |