CN105807371A - High power isolator - Google Patents
High power isolator Download PDFInfo
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- CN105807371A CN105807371A CN201410839064.0A CN201410839064A CN105807371A CN 105807371 A CN105807371 A CN 105807371A CN 201410839064 A CN201410839064 A CN 201410839064A CN 105807371 A CN105807371 A CN 105807371A
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- optical fiber
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- fiber collimator
- crystal
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Abstract
The invention discloses a high power isolator, comprising a first fiber collimator, a first birefringent crystal wedge, a Garnet optically active crystal, a metal block, a second birefringent crystal wedge, a magnet and a second fiber collimator in sequence along a forward optical path, wherein the Garnet optically active crystal and the metal block are fixed by tinning, and the included angle between the optical axes of the first birefringent crystal wedge and the second birefringent crystal wedge is 45 degrees. The optically active crystal and the metal block are fixed by tinning, so that the Garnet optically active crystal effectively dissipates heat, the influence of thermal effect on the isolator is reduced, and the cost of the high power isolator is reduced. In addition, the fiber head of each fiber collimator is polished into two small-angle wedge tilt angles or polished to be flat or adopts a single mode fiber with superfine outside diameter, so that reflected light of the system is reduced to return to the input end to burn out the fiber heads.
Description
Technical field
The present invention relates to optical-fibre communications, laser field, particularly relate to a kind of high power isolator.
Background technology
High power light isolator is widely used in high power solid state laser system, flashlight from light source to receive system transmitting procedure, reflect through many interfaces, reflection light is eventually returned to input, add the danger of system, it is therefore desirable to add high power isolator to reduce the impact on system of the return light.In the development of high power isolator, low cost, high-isolation, high damage threshold are Main Trends of The Developments in recent years, current high power light isolator design to be selected expensive large scale gyrotropi crystal material and adopts birefringece crystal sheet to carry out displacement light splitting to produce the principle of isolation, it is common to there is the shortcomings such as cost height, isolation are low.
In addition, for having the gyrotropi crystal of optically-active characteristic on core parts in optoisolator, owing to, in high power environment, for the absorption of laser, gyrotropi crystal causes that temperature raises, heat effect causes that crystal refractive index changes, thus producing thermal stress to affect job stability and the optical quality of isolator.
Summary of the invention
The technical problem to be solved in the present invention is to provide the high power isolator of a kind of low cost, high-isolation.
nullIn order to solve above-mentioned technical problem，The technical scheme is that a kind of high power isolator，The first optical fiber collimator is included successively along forward light path、The angle of wedge sheet of the first birefringece crystal、Garnet gyrotropi crystal、Metal derby、The angle of wedge sheet of the second birefringece crystal、Magnet and the second optical fiber collimator，Optical signal forward is transferred through the first optical fiber collimator collimation and shines the angle of wedge sheet of the first birefringece crystal，Optical signal is divided into the two orthogonal O light of bundle polarization state and E light by the angle of wedge sheet of the first birefringece crystal，O light and E light enter the angle of wedge sheet injecting to the second birefringece crystal after Garnet gyrotropi crystal polarization state rotates 45 °，It is coupled into light beam by the angle of wedge sheet of the second birefringece crystal，Eventually pass the second optical fiber collimator collimation injection，During optical signal reverse transfer，Optical signal is through the angle of wedge sheet of the second birefringece crystal、Garnet gyrotropi crystal、The direction original with two-beam road deviation after the angle of wedge sheet of the first birefringece crystal produces certain displacement and angle，Light beam cannot be coupled into and enter the first optical fiber collimator.
Further, the first described optical fiber collimator and the second optical fiber collimator adopt optical fiber head, lens, fixing optical fiber cable fixing pipe gluing connect, optical fiber head polishing has the wedge shape inclination angle of two.
Further, the first described optical fiber collimator and the light angle of wedge of the second optical fiber collimator are coated with metallic reflector.
Further, the first described optical fiber collimator and the second optical fiber collimator adopt optical fiber head to be the optical fiber collimator of flat.
Further, the first described optical fiber collimator and the second optical fiber collimator adopt superfine outside diameter single-mode fiber.
Further, tin plating mode is adopted to fix between described Garnet gyrotropi crystal and metal derby.
Further, the angle between the optical axis of the angle of wedge sheet of the first described birefringece crystal and the angle of wedge sheet of the second birefringece crystal is 45 °.
Further, the angle of wedge sheet of the first described birefringece crystal and the angle of wedge sheet of the second birefringece crystal adopt Yttrium Orthovanadate, Lithium metaniobate or quartz crystal.
Further, described magnet adopts magnet ring or magnetic piece.
Adopt and between gyrotropi crystal and metal derby, adopt tin plating fixing, thus reaching effective heat radiation of Garnet gyrotropi crystal, reducing the heat effect impact on isolator, reducing high power isolator cost.It addition, the optical fiber head of optical fiber collimator throws into two low-angle wedge shape inclination angles, or throw into flat or select the single-mode fiber of superfine outside diameter, reducing reflecting light back into input and burning out optical fiber head of system.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Fig. 1 is the structural representation of the present invention；
Fig. 2 is optical fiber head embodiment one structure chart of optical fiber collimator of the present invention；
Fig. 3 is optical fiber head embodiment two structure chart of optical fiber collimator of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
nullA kind of high power isolator，As shown in Figure 1，The first optical fiber collimator 10 is included successively along forward light path、The angle of wedge sheet 20 of the first birefringece crystal、Garnet gyrotropi crystal 30、Metal derby 40、The angle of wedge sheet 50 of the second birefringece crystal、Magnet 60 and the second optical fiber collimator 70，Optical signal forward is transferred through the first optical fiber collimator 10 and collimates outgoing，Improve coupling efficiency，To the angle of wedge sheet 20 of the first birefringece crystal after the first optical fiber collimator 10 collimates outgoing，Optical signal is divided into the two orthogonal O light of bundle polarization state and E light by the angle of wedge sheet 20 of the first birefringece crystal，O light and E light enter Garnet gyrotropi crystal 30 polarization state and rotate counterclockwise or turn clockwise and inject to the angle of wedge sheet 50 of the second birefringece crystal after 45 °，It is coupled into light beam by the angle of wedge sheet 50 of the second birefringece crystal，Eventually pass the second optical fiber collimator 70 collimation injection，During optical signal reverse transfer，Optical signal collimates outgoing through the second optical fiber collimator 70，The collimated light of outgoing is divided into the two orthogonal O light of bundle polarization state and E light through the angle of wedge sheet 50 of the second birefringece crystal，Subsequently into Garnet gyrotropi crystal 30，Nonreciprocity due to Garnet gyrotropi crystal 30，The polarization state of O light and E light rotates counterclockwise or turns clockwise 45 °，Owing to the combination of the angle of wedge sheet 20 of the first birefringece crystal and the angle of wedge sheet 50 of the second birefringece crystal is equivalent to wollaston prism for backlight，Two-beam is after the angle of wedge sheet 20 entering the first birefringece crystal，O light and E light deviate original direction and produce certain displacement and angle，Angle of wedge sheet 20 at the first birefringece crystal cannot synthesize light beam，The first optical fiber collimator 10 cannot be coupled into，Thus realizing backlight isolation.
In the present embodiment, tin plating mode is adopted to fix between described Garnet gyrotropi crystal 30 and metal derby 40, effectively solve the heat dissipation problem of optically activ material, thus realizing the high power isolator of the Garnet structure of low cost, angle between the optical axis of the angle of wedge sheet 20 of the first described birefringece crystal and the angle of wedge sheet 50 of the second birefringece crystal is 45 °, the angle of wedge sheet 20 of the first described birefringece crystal and the angle of wedge sheet 50 of the second birefringece crystal adopt Yttrium Orthovanadate, Lithium metaniobate or quartz crystal, birefringece crystal angle of wedge sheet is adopted to substitute sheet, angular separation can be realized and reach more high-isolation performance, described magnet 60 adopts magnet ring or magnetic piece.
In the present embodiment, as shown in Figure 2, optical fiber head 11 starts to polish to fibre core direction from covering, throw into two low-angle wedge shape inclination angles, optical fiber head 11, fixing optical fiber cable fixing pipe 12 and C lens 13 between adopt glue bond, the fixing pipe 12 of fixing optical fiber cable adopts glass tubing or metal tube, and two bundle polarized light of optical fiber head 11 outgoing are transferred to C lens 13, through C lens 13 end face reflection, can return on optical fiber head 11 end face.Owing to optical fiber head 11 has two low-angle inclination angles so that reflection light exists low-angle angle of incidence, similar glancing incidence.Reflection light glancing incidence again reflexes in air to face, optical fiber head 11 inclination angle, and reduces the reflection light entered in optical fiber.If metallized reflective layer on the optical fiber angle of wedge, entrance cladding light can be eliminated completely.
In the present embodiment, as it is shown on figure 3, optical fiber head 11 is polished to flat, then adopting fixture pottery or metal derby 14 and optical fiber head 11 to be fixed, finally adopting note stannum mode to inject ashbury metal 15 between optical fiber head and pottery or metal derby 14, thus fixing optical fiber head 11.
Although specifically showing in conjunction with preferred embodiment and describing the present invention; but those skilled in the art should be understood that; in the spirit and scope without departing from appended claims invention defined; in the form and details the present invention is made a variety of changes, be protection scope of the present invention.
Claims (9)
- null1. a high power isolator，It is characterized in that: include the first optical fiber collimator successively along forward light path、The angle of wedge sheet of the first birefringece crystal、Garnet gyrotropi crystal、Metal derby、The angle of wedge sheet of the second birefringece crystal、Magnet and the second optical fiber collimator，Optical signal forward is transferred through the first optical fiber collimator collimation and shines the angle of wedge sheet of the first birefringece crystal，Optical signal is divided into the two orthogonal O light of bundle polarization state and E light by the angle of wedge sheet of the first birefringece crystal，O light and E light enter the angle of wedge sheet injecting to the second birefringece crystal after Garnet gyrotropi crystal polarization state rotates 45 °，It is coupled into light beam by the angle of wedge sheet of the second birefringece crystal，Eventually pass the second optical fiber collimator collimation injection，During optical signal reverse transfer，Optical signal is through the angle of wedge sheet of the second birefringece crystal、Garnet gyrotropi crystal、The direction original with two-beam road deviation after the angle of wedge sheet of the first birefringece crystal produces certain displacement and angle，Light beam cannot be coupled into and enter the first optical fiber collimator.
- 2. a kind of high power isolator according to claim 1, it is characterised in that: the first described optical fiber collimator and the second optical fiber collimator adopt optical fiber head, lens, fixing optical fiber cable fixing pipe gluing connect, optical fiber head polishing has the wedge shape inclination angle of two.
- 3. a kind of high power isolator according to claim 2, it is characterised in that: the first described optical fiber collimator and the light angle of wedge of the second optical fiber collimator are coated with metallic reflector.
- 4. a kind of high power isolator according to claim 1, it is characterised in that: the first described optical fiber collimator and the second optical fiber collimator adopt optical fiber head to be the optical fiber collimator of flat.
- 5. according to described a kind of high power isolator arbitrary in claim 2-4, it is characterised in that: the first described optical fiber collimator and the second optical fiber collimator adopt superfine outside diameter single-mode fiber.
- 6. a kind of high power isolator according to claim 1, it is characterised in that: adopt tin plating mode to fix between described Garnet gyrotropi crystal and metal derby.
- 7. a kind of high power isolator according to claim 1, it is characterised in that: the angle between the optical axis of the angle of wedge sheet of the first described birefringece crystal and the angle of wedge sheet of the second birefringece crystal is 45 °.
- 8. a kind of high power isolator according to claim 1, it is characterised in that: the angle of wedge sheet of the first described birefringece crystal and the angle of wedge sheet of the second birefringece crystal adopt Yttrium Orthovanadate, Lithium metaniobate or quartz crystal.
- 9. a kind of high power isolator according to claim 1, it is characterised in that: described magnet adopts magnet ring or magnetic piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410839064.0A CN105807371A (en) | 2014-12-30 | 2014-12-30 | High power isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410839064.0A CN105807371A (en) | 2014-12-30 | 2014-12-30 | High power isolator |
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| Publication Number | Publication Date |
|---|---|
| CN105807371A true CN105807371A (en) | 2016-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410839064.0A Pending CN105807371A (en) | 2014-12-30 | 2014-12-30 | High power isolator |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1385713A (en) * | 2002-06-13 | 2002-12-18 | 浙江大学 | Pseudospherical collimation microlens for optic fibre collimator |
| CN1402051A (en) * | 2001-08-23 | 2003-03-12 | 三一光电子有限公司 | Polarization independent type optical isolator and mfg. method thereof |
| CN1419143A (en) * | 2002-12-12 | 2003-05-21 | 华中科技大学 | Optical path mixing device |
| CN2791667Y (en) * | 2005-02-05 | 2006-06-28 | 福州高意通讯有限公司 | Assembling stru cture of optical fiber isolator |
| CN201166753Y (en) * | 2008-03-15 | 2008-12-17 | 光库通讯(珠海)有限公司 | Optical isolator |
| CN201222106Y (en) * | 2008-07-30 | 2009-04-15 | 翔光(上海)光通讯器材有限公司 | Compact package light isolator |
| CN201780389U (en) * | 2010-05-21 | 2011-03-30 | 浙江合波光学科技有限公司 | Optical fiber device integrating filtering, isolation and mode filed matching functions |
| CN102902014A (en) * | 2011-04-29 | 2013-01-30 | 中国科学院西安光学精密机械研究所 | Optoisolator |
| CN103543493A (en) * | 2013-10-29 | 2014-01-29 | 深圳朗光科技有限公司 | Optical fiber isolator and optical fiber laser device |
-
2014
- 2014-12-30 CN CN201410839064.0A patent/CN105807371A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1402051A (en) * | 2001-08-23 | 2003-03-12 | 三一光电子有限公司 | Polarization independent type optical isolator and mfg. method thereof |
| CN1385713A (en) * | 2002-06-13 | 2002-12-18 | 浙江大学 | Pseudospherical collimation microlens for optic fibre collimator |
| CN1419143A (en) * | 2002-12-12 | 2003-05-21 | 华中科技大学 | Optical path mixing device |
| CN2791667Y (en) * | 2005-02-05 | 2006-06-28 | 福州高意通讯有限公司 | Assembling stru cture of optical fiber isolator |
| CN201166753Y (en) * | 2008-03-15 | 2008-12-17 | 光库通讯(珠海)有限公司 | Optical isolator |
| CN201222106Y (en) * | 2008-07-30 | 2009-04-15 | 翔光(上海)光通讯器材有限公司 | Compact package light isolator |
| CN201780389U (en) * | 2010-05-21 | 2011-03-30 | 浙江合波光学科技有限公司 | Optical fiber device integrating filtering, isolation and mode filed matching functions |
| CN102902014A (en) * | 2011-04-29 | 2013-01-30 | 中国科学院西安光学精密机械研究所 | Optoisolator |
| CN103543493A (en) * | 2013-10-29 | 2014-01-29 | 深圳朗光科技有限公司 | Optical fiber isolator and optical fiber laser device |
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Application publication date: 20160727 |