CN103869418B - A kind of wide spectrum high damage threshold optoisolator - Google Patents
A kind of wide spectrum high damage threshold optoisolator Download PDFInfo
- Publication number
- CN103869418B CN103869418B CN201410076349.3A CN201410076349A CN103869418B CN 103869418 B CN103869418 B CN 103869418B CN 201410076349 A CN201410076349 A CN 201410076349A CN 103869418 B CN103869418 B CN 103869418B
- Authority
- CN
- China
- Prior art keywords
- prism
- face
- thin film
- optical thin
- cemented
- 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.)
- Active
Links
- 238000001228 spectrum Methods 0.000 title claims abstract description 14
- 230000003287 optical Effects 0.000 claims abstract description 86
- 238000006073 displacement reaction Methods 0.000 claims abstract description 21
- 239000010409 thin film Substances 0.000 claims description 55
- 230000005540 biological transmission Effects 0.000 claims description 38
- 238000004026 adhesive bonding Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000002955 isolation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000000149 penetrating Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000002441 reversible Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The present invention proposes a kind of wide spectrum high damage threshold optoisolator, solve the problem that in prior art, beam splitter crystal limits isolator damage threshold, a kind of wide spectrum high damage threshold optoisolator, including the first polarization cemented prism, displacement prism, second polarization cemented prism, magneto-optical crystal, it is provided with the cavity of cavity, the central shaft of described cavity is optical axis, described first polarization cemented prism, magneto-optical crystal, displacement prism, second polarization cemented prism is set in turn in described cavity along optical path direction, use cemented prism as beam splitter/combiner, because cemented prism has higher damage threshold, without limitation on optoisolator damage threshold.
Description
Technical field
The present invention relates to optoisolator field, particularly relate to a kind of wide spectrum high damage threshold optoisolator.
Background technology
In laser system, due to the reflection to light source of the optical element in light path, often make system
Produce harmful effect, in order to solve this difficult problem, it may be considered that put into the passive device of light allowing Unidirectional light to pass through
Part.Optoisolator operation principle based on magneto-optical crystal Faraday effect, can effectively eliminate reflection light to light
The damage of road system.It is low that optoisolator has forward insertion loss, and reverse isolation degree is high, and return loss is high,
Allow light to a direction by and stop reflection light the characteristic such as to pass through, can be widely used for optical fiber laser, light
In the various solid-state lasers such as parameter oscillation laser, multistage amplification laser instrument, all solid state frequency double laser,
Isolator the most on the market, two ends use yvo4 crystal beam splitter, and the middle magneto-optic for subsidiary permanent magnetic field is brilliant
Body, this kind of structure design is only used in the light path of single wavelength, and isolator is limited by yvo4 crystal,
Damage threshold is less.
Summary of the invention
The present invention proposes a kind of wide spectrum high damage threshold optoisolator, solves beam splitter in prior art brilliant
The problem that body limits isolator damage threshold.
The technical scheme is that and be achieved in that: a kind of wide spectrum high damage threshold optoisolator, including
First polarization cemented prism, displacement prism, the second polarization cemented prism, magneto-optical crystal, it is provided with the chamber of cavity
Body, the central shaft of described cavity is optical axis, described first polarization cemented prism, magneto-optical crystal, displacement rib
Mirror, the second polarization cemented prism are set in turn in described cavity along optical path direction.
As preferred technical scheme, described first polarization cemented prism is by the first prism and described first rib
The second prism composition that mirror gluing is fixing；Described first prism and described second prism end face in opposite directions are first
Cemented surface, described first cemented surface and optical axis angle at 45 °；Described first prism tip face and described first
Cemented surface is parallel；The first optical thin film all it is coated with on described first prism tip face and described first cemented surface.
As preferred technical scheme, described first optical thin film to p light transmission, transmission coefficient more than and etc.
In 98%@45 °, and to s luminous reflectance, reflection coefficient is more than and equal to 99.8%@45 °.
As preferred technical scheme, described displacement prism includes being perpendicular to the front end face of optical axis, being parallel to light
Rear end face that the left side of the top end face of axle and optical axis angle at 45 ° be arranged in parallel with described front end face,
The right side that the bottom face be arrangeding in parallel with described top end face be arranged in parallel with described left side；Described front end
The second optical thin film all it is coated with on face and described rear end face；The all it is coated with on described left side and described right side
Three optical thin films.
As preferred technical scheme, s light transmission, transmission coefficient are more than and are equal to by described second optical thin film
98%@0 °；Described 3rd optical thin film is to s luminous reflectance, and reflection coefficient is more than and equal to 98%@45 °.
As preferred technical scheme, described second polarization cemented prism is by prism and described Rhizoma Sparganii
The 4th prism composition that mirror gluing is fixing, described prism and described 4th prism end face in opposite directions are second
Cemented surface, described second cemented surface and optical axis angle at 45 °, described second cemented surface is coated with the 4th optics
Thin film；It is coated with the 5th optical thin film on the prism top end face be arrangeding in parallel with described second cemented surface；Institute
State prism front end face, described 4th prism front end face, described prism rear end face are each perpendicular to optical axis；
It is coated with the 6th optical thin film on described prism front end face；It is coated with the 7th light on described 4th prism front end face
Learn thin film；It is coated with the 8th optical thin film on described prism rear end face.
As preferred technical scheme, s light transmission, transmission coefficient are more than and are equal to by described 4th optical thin film
98%@45 °；Described 5th optical thin film is to p luminous reflectance, and reflection coefficient is more than and equal to 98%@45 °；
Described 6th optical thin film is to p light transmission, and reflection coefficient is more than and equal to 98%@0 °；Described 7th optics
Thin film is to s light transmission, and reflection coefficient is more than and equal to 98%@0 °；Described 8th optical thin film is saturating to p light
Penetrating, transmission coefficient is more than and equal to 98%@0 °, and to s light transmission, transmission coefficient is more than and is equal to
99.8%@0 °.
Light beam forward, through optical axis, is first divided into p light and s light, going out of s light by the first polarization cemented prism
Exit point separates with P light eye point, rotates 45 ° through magneto-optical crystal rear polarizer direction, and p light and s light convert
For p0 light and s0 light, displacement prism by being moved to a certain ad-hoc location, p0 light by s0 light after 2 secondary reflections
Also being moved to same ad-hoc location after the second polarization cemented prism reflection, two-beam is from the second polarization gluing
Nature light is synthesized, when light beam is reverses through optical axis, at magneto-optical crystal and second glued polarization during prism outgoing
Between prism, light path is reversible, but according to Faraday effect principle, through magneto-optical crystal, polarization side
Identical with direction of rotation during forward-propagating rather than reverse to direction of rotation, therefore inclined back through first
Shake the polarization direction of p light and s light before prism and forward-propagating phase difference 90 °, also cannot be by the first polarization
Cemented prism synthesizes, but goes out, by extinction material from the first upper and lower surface transmission polarizing cemented prism respectively
Material absorbs, and thus achieves backlight isolation, owing to only make use of reflection and transmission, can be used for isolation width
Wave band, meanwhile, cemented prism has higher damage threshold, solves beam splitter crystal and limits isolator damage
The problem of threshold value.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to enforcement
In example or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, describe below
In accompanying drawing be only some embodiments of the present invention, for those of ordinary skill in the art, do not paying
On the premise of going out creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the forward light path structural representation by optoisolator；
Fig. 2 is the reverse optical path structural representation by optoisolator；
Fig. 3 is the left view schematic diagram of the first polarization cemented prism；
Fig. 4 is the schematic top plan view of displacement prism；
Fig. 5 is the left view schematic diagram of the second polarization cemented prism；
Fig. 6 is the change procedure figure of polarization direction in light path.
In figure: L1-first polarizes cemented prism；L2-displacement prism；L3-second polarizes cemented prism；C-magnetic
Luminescent crystal；L11-the first prism；L12-the second prism；L31-prism；L32-the 4th prism；F11-
First optical thin film；F21-the second optical thin film；F22-the 3rd optical thin film；F31-the 4th optical thin film；F32-
5th optical thin film；F33-the 6th optical thin film；F34-the 7th optical thin film；F35-the 8th optical thin film；S11-
First prism front end face；S12-the second prism rear end face；S13-the first prism rear end face；At the bottom of S15-the second prism
End face；S35-the 4th prism bottom face.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly
Chu, be fully described by, it is clear that described embodiment be only a part of embodiment of the present invention rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation
The every other embodiment obtained under property work premise, broadly falls into the scope of protection of the invention.
As shown in Figure 1 and Figure 2, a kind of wide spectrum high damage threshold optoisolator, including the first polarization gluing rib
Mirror L1, displacement prism L2, the second polarization cemented prism L3, magneto-optical crystal C, it is provided with the cavity of cavity,
The central shaft of cavity is optical axis, the first polarization cemented prism L1, magneto-optical crystal C, displacement prism L2, the
Two polarization cemented prism L3 are set in turn in cavity along optical path direction.
As it is shown on figure 3, the first polarization cemented prism L1 is glued by the first prism L11 and the first prism L11
The second fixing prism L12 is constituted；First prism L11 and the second prism L12 end face in opposite directions are the first glue
Conjunction face, the first cemented surface and optical axis angle at 45 °；First prism tip face is parallel with the first cemented surface；The
The first optical thin film F11 all it is coated with on one prism tip face and the first cemented surface；First optical thin film F11 is to p
Light transmission, transmission coefficient is more than and equal to 98%@45 °, and to s luminous reflectance, reflection coefficient is more than and is equal to
99.8%@45 °.First prism front end face S11, the first prism rear end face S13 and the second prism rear end face S12
Being each perpendicular to optical axis, the second prism bottom face S15 is parallel to optical axis.
Magneto-optical crystal C has the permanent magnetic field being parallel to optical axis, and clockwise, the light of magneto-optical crystal C rotates
Angle is 45 °, the computing formula β=vBd of magneto-optical crystal C anglec of rotation arc, and wherein, β is anglec of rotation arc, B
Being the magnetic field component towards light wave propagation direction, d is the length of light wave and magnetic field interaction, and v is material
Verdet constant, relevant with material essence, wavelength and temperature.
As shown in Figure 4, displacement prism L2 include being perpendicular to optical axis front end face, be parallel to optical axis top end face,
The rear end face that the left side of angle at 45 ° with optical axis and front end face be arranged in parallel be arranged in parallel with top end face
The right side that be arranged in parallel with left side of bottom face；Second all it is coated with optically thin on front end face and rear end face
Film F21, the second optical thin film F21 are to s light transmission, and transmission coefficient is more than and equal to 98%@0 °；Left end
The 3rd optical thin film F22, the 3rd optical thin film F22 all it is coated with to s luminous reflectance, reflection system on face and right side
Number is more than and equal to 98%@45 °, the left side of displacement prism L2, right side are each perpendicular to displacement prism
The bottom face of L2.
As it is shown in figure 5, the second polarization cemented prism L3 is glued by prism L31 and prism L31
The 4th fixing prism L32 is constituted, and prism L31 and the 4th prism L32 end face in opposite directions are the second glue
Conjunction face, the second cemented surface and optical axis angle at 45 °, the second cemented surface is coated with the 4th optical thin film F31；
It is coated with the 5th optical thin film F32 on the prism top end face be arrangeding in parallel with the second cemented surface；Before prism
End face, the 4th prism front end face, prism rear end face are each perpendicular to optical axis；Plate on prism front end face
There is the 6th optical thin film F33；It is coated with the 7th optical thin film F34 on 4th prism front end face；Prism rear end
It is coated with the 8th optical thin film F35, the 4th prism bottom face S35 on face and is parallel to optical axis.4th optical thin film
F31 is to s light transmission, and transmission coefficient is more than and equal to 98%@45 °；5th optical thin film F32 is anti-to p light
Penetrating, reflection coefficient is more than and equal to 98%@45 °；6th optical thin film F33 is to p light transmission, reflection system
Number is more than and equal to 98%@0 °；S light transmission, reflection coefficient are more than and are equal to by the 7th optical thin film F34
98%@0 °；8th optical thin film F35 is to p light transmission, and transmission coefficient is more than and equal to 98%@0 °, and
To s light transmission, transmission coefficient is more than and equal to 99.8%@0 °.
As shown in Figure 6, the operation principle of optoisolator: the first polarization cemented prism L1 is for dividing nature light
From for the two mutually perpendicular polarized light in bundle polarization direction, when a branch of natural light arrives the first cemented surface, p light will
Through this face, s light will be reflected, and is reflected when the s light reflected arrives the first prism tip face, two bundles
Light p light and s light enter magneto-optical crystal C, due to the knot of Faraday effect along OA, O ' A ' two-way respectively
Really, from magneto-optical crystal C, the polarization direction through two-beam all rotates a certain angle to a direction, should
Angle is 45 °, because the polarization direction of two light beams all rotates same angle, the polarization direction of two-beam is the most mutual
Perpendicular.In two-way light path, add displacement prism L2 and second polarization cemented prism L3, make OA road light pair
Displacement prism L2 is s light, when, after displacement prism L2, output light enters the second polarization cemented prism L3
Being p light, it is s light that O ' A ' road light enters the second polarization cemented prism L3, and p light is through the second glued rib of polarization
Mirror L3 top end face and the reflection of the second cemented surface, merge with the s light from the second cemented surface transmission, so, and second
S light and p light are recombined nature light by polarization cemented prism L3.For ensureing that OA road light is to displacement prism L2
It is s light, is p light to the second polarization cemented prism L3, need the glued rib of displacement prism L2 and second polarization
The bottom surface of mirror L3 rotates 45 ° relative to the first polarization cemented prism L1.
Within the system, reflection light, after the second polarization cemented prism L3, is divided into a pair polarization direction mutual
Vertical polarized light, this is to polarized light after magneto-optical crystal C, and its polarization direction rotates 45° angle equally；
Then reflection light polarization direction relatively incident illumination have rotated 90 °, and reflection light A ' O ' arrives the first glued rib of polarization
Being directed through after mirror L1 top end face, AO is reflected from the direction outgoing vertical with incident illumination by the first cemented surface,
Therefore reflection light can not be reflected back toward original optical path, serves the buffer action to reflection light.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Within bright spirit and principle, any modification, equivalent substitution and improvement etc. made, should be included in this
Within bright protection domain.
Claims (6)
1. one kind wide spectrum high damage threshold optoisolator, it is characterised in that:
Including the first polarization cemented prism, displacement prism, the second polarization cemented prism, magneto-optical crystal, it is provided with
The cavity of cavity,
The central shaft of described cavity is optical axis,
Described first polarization cemented prism, magneto-optical crystal, displacement prism, the second polarization cemented prism are along light path
Direction is set in turn in described cavity；
The second prism that described first polarization cemented prism is fixed by the first prism and described first prism cementing
Constitute；
Described first prism and described second prism end face in opposite directions are the first cemented surface, described first cemented surface
Angle at 45 ° with optical axis；
Described first prism tip face is parallel with described first cemented surface；
The first optical thin film all it is coated with on described first prism tip face and described first cemented surface；
Magneto-optical crystal has the permanent magnetic field being parallel to optical axis.
2. a kind of wide spectrum high damage threshold optoisolator as claimed in claim 1, it is characterised in that:
Described first optical thin film is to p light transmission, and transmission coefficient is more than and equal to 98%@45 °, and to s
Luminous reflectance, reflection coefficient is more than and equal to 99.8%@45 °.
3. a kind of wide spectrum high damage threshold optoisolator as claimed in claim 2, it is characterised in that:
Front end face that described displacement prism includes being perpendicular to optical axis, the top end face being parallel to optical axis become with optical axis
The rear end face that the left side of 45 ° of angles be arranged in parallel with described front end face be arranged in parallel with described top end face
The right side that be arranged in parallel with described left side of bottom face；
The second optical thin film all it is coated with on described front end face and described rear end face；
The 3rd optical thin film all it is coated with on described left side and described right side.
4. a kind of wide spectrum high damage threshold optoisolator as claimed in claim 3, it is characterised in that:
Described second optical thin film is to s light transmission, and transmission coefficient is more than and equal to 98%@0 °；
Described 3rd optical thin film is to s luminous reflectance, and reflection coefficient is more than and equal to 98%@45 °.
5. a kind of wide spectrum high damage threshold optoisolator as described in claim 3 or 4, it is characterised in that:
The 4th prism that described second polarization cemented prism is fixed by prism and described prism gluing
Constitute,
Described prism and described 4th prism end face in opposite directions are the second cemented surface, folder at 45 ° with optical axis
Angle, described second cemented surface is coated with the 4th optical thin film；
It is coated with the 5th optical thin film on the prism top end face be arrangeding in parallel with described second cemented surface；
Described prism front end face, described 4th prism front end face, described prism rear end face are the most vertical
In optical axis；
It is coated with the 6th optical thin film on described prism front end face；
It is coated with the 7th optical thin film on described 4th prism front end face；
It is coated with the 8th optical thin film on described prism rear end face.
6. a kind of wide spectrum high damage threshold optoisolator as claimed in claim 5, it is characterised in that:
Described 4th optical thin film is to s light transmission, and transmission coefficient is more than and equal to 98%@45 °；
Described 5th optical thin film is to p luminous reflectance, and reflection coefficient is more than and equal to 98%@45 °；
Described 6th optical thin film is to p light transmission, and reflection coefficient is more than and equal to 98%@0 °；
Described 7th optical thin film is to s light transmission, and reflection coefficient is more than and equal to 98%@0 °；
Described 8th optical thin film is to p light transmission, and transmission coefficient is more than and equal to 98%@0 °, and to s light
Transmission, transmission coefficient is more than and equal to 99.8%@0 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410076349.3A CN103869418B (en) | 2014-03-04 | A kind of wide spectrum high damage threshold optoisolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410076349.3A CN103869418B (en) | 2014-03-04 | A kind of wide spectrum high damage threshold optoisolator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103869418A CN103869418A (en) | 2014-06-18 |
| CN103869418B true CN103869418B (en) | 2016-11-30 |
Family
ID=
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0493814A (en) * | 1990-08-03 | 1992-03-26 | Fuji Elelctrochem Co Ltd | Production of optical isolator |
| JPH08286149A (en) * | 1995-04-13 | 1996-11-01 | Tdk Corp | Optical isolator element and its production |
| US6088153A (en) * | 1997-06-26 | 2000-07-11 | Scientific-Atlanta, Inc. | Multi-functional optical isolator |
| CN102096210A (en) * | 2010-11-22 | 2011-06-15 | 福建福晶科技股份有限公司 | Faraday optoisolator used in wide band |
| CN203759301U (en) * | 2014-03-04 | 2014-08-06 | 青岛海泰光电技术有限公司 | Optical isolator with broadband spectrum and high damage threshold |
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0493814A (en) * | 1990-08-03 | 1992-03-26 | Fuji Elelctrochem Co Ltd | Production of optical isolator |
| JPH08286149A (en) * | 1995-04-13 | 1996-11-01 | Tdk Corp | Optical isolator element and its production |
| US6088153A (en) * | 1997-06-26 | 2000-07-11 | Scientific-Atlanta, Inc. | Multi-functional optical isolator |
| CN102096210A (en) * | 2010-11-22 | 2011-06-15 | 福建福晶科技股份有限公司 | Faraday optoisolator used in wide band |
| CN203759301U (en) * | 2014-03-04 | 2014-08-06 | 青岛海泰光电技术有限公司 | Optical isolator with broadband spectrum and high damage threshold |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7081996B2 (en) | Isolated polarization beam splitter and combiner | |
| CA2352834A1 (en) | Isolated polarization beam splitter and combiner | |
| US9823500B2 (en) | Optical assembly for 90° polarization rotation | |
| US6757451B2 (en) | Optical circulator | |
| CN104656264A (en) | Polarization beam splitting and combining device | |
| CN105511121B (en) | Optoisolator | |
| US6943932B2 (en) | Waveguide mach-zehnder optical isolator utilizing transverse magneto-optical phase shift | |
| CA2344021A1 (en) | Polarization beam splitter or combiner | |
| JPH07281128A (en) | Optical isolator | |
| CN103852825A (en) | Optical isolator | |
| CN106067655A (en) | A kind of with electric-optically Q-switched optoisolator | |
| CN103869418B (en) | A kind of wide spectrum high damage threshold optoisolator | |
| CN107037539A (en) | Single polarization transmission formula photonic crystal fiber resonator | |
| CN203759301U (en) | Optical isolator with broadband spectrum and high damage threshold | |
| RU2405179C1 (en) | Electrooptic modulator on mach-zehnder interferometre circuit | |
| CN107561647A (en) | A kind of orthogonal optoisolator of tail optical fiber | |
| CN102073143A (en) | Crystal polarizing, combining and splitting device | |
| CN103869418A (en) | Broadband-spectrum high-damage-threshold optical isolator | |
| CN209102953U (en) | A kind of three port optical loop device of compact | |
| JPH0477713A (en) | Optical isolator independent of polarization | |
| CN203759300U (en) | Optical isolator | |
| JP2516463B2 (en) | Polarization-independent optical isolator | |
| CN106019617B (en) | A kind of optically isolated beam merging apparatus | |
| CN108828798A (en) | A kind of high power reflection-type optical fiber laser isolator | |
| US9541776B2 (en) | Optical assembly for 90° polarization rotation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |