CN103852825A - Optical isolator - Google Patents
Optical isolator Download PDFInfo
- Publication number
- CN103852825A CN103852825A CN201410076649.1A CN201410076649A CN103852825A CN 103852825 A CN103852825 A CN 103852825A CN 201410076649 A CN201410076649 A CN 201410076649A CN 103852825 A CN103852825 A CN 103852825A
- Authority
- CN
- China
- Prior art keywords
- prism
- light
- optical
- cemented
- face
- 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
Abstract
The invention provides an optical isolator. The optical isolator resolves the problem that an optical isolator in the prior art can only be used for isolating narrow wave bands. The optical isolator comprises a first glued prism, a magneto-optical crystal, a half wave plate, a second glued prism and a cavity provided with a secondary cavity; the central axis of the secondary cavity is the optical axis; the first glued prism, the magneto-optical crystal, the half wave plate and the second glued prism are sequentially arranged on the central axis in the secondary cavity in the direction of a light path, the glued prisms and the wave plate are introduced into the optical isolator and used for isolation design of the polarization direction of natural light, the interiors of the glued prisms are plated with optical films, and the natural light can be isolated well.
Description
Technical field
The present invention relates to optoisolator field, refer to especially a kind of optoisolator.
Background technology
In laser system, due to the reflex of the optical element in light path to light source, tend to make system to produce harmful effect.In order to solve this difficult problem, can consider to put into the optical passive component that a permission Unidirectional light passes through.Based on the principle of work of magneto-optical crystal Faraday effect, in system light path, add optoisolator, can effectively eliminate reflected light to systematically damage.
It is low that optoisolator has forward insertion loss, reverse isolation degree is high, return loss is high, allow light to a direction by the characteristic such as stop that reflected light passes through, can be widely used in fiber laser, optical parameter oscillating laser, multistage amplifying laser device, all solid state frequency double laser etc., in various semi-conductor solid lasers, the optoisolator of current existing multiple design, but still not for broadband optoisolator.
Summary of the invention
The present invention proposes a kind of optoisolator, has solved the problem that optoisolator in prior art can only be used for isolating narrow wave band.
Technical scheme of the present invention is achieved in that a kind of optoisolator, comprises the first cemented prism, magneto-optical crystal, half-wave plate, the second cemented prism, is provided with the cavity of cavity; The central shaft of described cavity is optical axis; Described the first cemented prism, magneto-optical crystal, half-wave plate, the second cemented prism are set in turn on the central shaft in described cavity along optical path direction.
As preferred technical scheme, described the first cemented prism is by the first prism, form with fixing the second prism of described the first prism cementing; Described the first prism and described the second prism end face are in opposite directions the first cemented surface, described the first cemented surface and optical axis angle at 45 °, and be coated with the first optical thin film on described the first cemented surface; The the second prism bottom face be arrangeding in parallel with described the first cemented surface is provided with the second optical thin film; Described the first prism top end face is parallel with optical axis.
As preferred technical scheme, described the first optical thin film is to the transmission of p light and to the reflection of s light, transmission coefficient is more than or equal to 45 ° of 98%@, and reflection coefficient is more than or equal to 45 ° of 99.8%@; Described the second optical thin film all reflects p light and s light, and reflection coefficient is more than or equal to 45 ° of 99.8%@.
As preferred technical scheme, described the second cemented prism is by prism, form with fixing the 4th prism of described prism gummed; Described prism and described the 4th prism end face are in opposite directions the second cemented surface, and described the second cemented surface and optical axis angle at 45 ° are coated with the 3rd optical thin film on described the second cemented surface; On the prism top end face be arrangeding in parallel with described the second cemented surface, be coated with the 4th optical thin film; Described the 4th prism bottom face is parallel to optical axis; The angle of described the second cemented surface and described the 4th prism bottom face is 45 °.
As preferred technical scheme, described the 3rd optical thin film is to the transmission of p light and to the reflection of s light, transmission coefficient is more than or equal to 45 ° of 98%@, and reflection coefficient is more than or equal to 45 ° of 99.8%@; Described the 4th optical thin film all reflects p light and s light, and reflection coefficient is more than or equal to 45 ° of 99.8%@.
As preferred technical scheme, the angle of described half-wave plate optical axis and vertical direction is 22.5 °; Along in optical axis clockwise direction, described half-wave plate is 45 ° to the light rotation angle of p light, is 225 ° to the light rotation angle of s light.
As preferred technical scheme, described the first prism top end face is parallel to described the 4th prism bottom face.
The present invention compares produced beneficial effect with background technology:
In optoisolator, introduce cemented prism and wave plate for the polarization direction separate design to natural light, and in cemented prism, be coated with optical thin film, can realize the good isolation effect to natural light.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of a kind of optoisolator of the present invention;
Fig. 2 is that schematic diagram is looked on a left side for the first cemented prism;
Fig. 3 is that schematic diagram is looked on a left side for the second cemented prism;
Fig. 4 is light polarization variations schematic diagram in each components and parts.
In figure: L1-the first cemented prism; L2-the second cemented prism; C-magneto-optical crystal; B-half-wave plate; L11-the first prism; L12-the second prism; L21-prism; L22-the 4th prism; S11-the second prism front end face; S12-the second prism rear end face; S13-the first prism rear end face; S14-the first prism top end face; S21-prism front end face; S22-the 4th prism front end face; S23-prism rear end face; S24-the 4th prism bottom face; F11-the first optical thin film; F12-the second optical thin film; F21-the 3rd optical thin film; F22-the 4th optical thin film.
Embodiment
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 clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, a kind of optoisolator, comprises the first cemented prism L1, magneto-optical crystal C, half-wave plate B, the second cemented prism L2, is provided with the cavity of cavity; The central shaft of cavity is optical axis; The first cemented prism L1, magneto-optical crystal C, half-wave plate B, the second cemented prism L2 are set in turn on the central shaft in cavity along optical path direction.
As shown in Figure 2, the first cemented prism L1 is by the first prism L11, form with fixing the second prism L12 of the first prism L11 gummed; The first prism L11 and the second prism L12 end face are in opposite directions the first cemented surface, the first cemented surface and optical axis angle at 45 °, and on the first cemented surface, be coated with the first optical thin film F11; The the second prism bottom face be arrangeding in parallel with the first cemented surface is provided with the second optical thin film F12; The first prism top end face S14 is parallel with optical axis, and the second prism front end face S11, the second prism rear end face S12 and the first prism rear end face S13 are all perpendicular to optical axis.The first optical thin film F11 is to the transmission of p light and to the reflection of s light, transmission coefficient is more than or equal to 45 ° of 98%@, and reflection coefficient is more than or equal to 45 ° of 99.8%@; The second optical thin film F12 all reflects p light and s light, and reflection coefficient is more than or equal to 45 ° of 99.8%@.
Magneto-optical crystal C has the permanent magnetic field that is parallel to optical axis, and in optical axis clockwise direction, the light rotation angle of magneto-optical crystal C is 45 °, and according to Faraday effect principle, during through magneto-optical crystal C, the sense of rotation of polarization direction and the direction of propagation are irrelevant.
As shown in Figure 3, the second cemented prism L2 is by prism L21, form with fixing the 4th prism L22 of prism L21 gummed; Prism L21 and the 4th prism L22 end face are in opposite directions the second cemented surface, and the second cemented surface and optical axis angle at 45 ° is coated with the 3rd optical thin film F21 on the second cemented surface; On the prism top end face be arrangeding in parallel with the second cemented surface, be coated with the 4th optical thin film F22; The angle of the second cemented surface and the 4th prism bottom face is 45 °, and prism front end face S21, prism rear end face S23, the 4th prism front end face S22 are all perpendicular to optical axis, and the 4th prism bottom face S24 is parallel to optical axis.The 3rd optical thin film F21 is to the transmission of p light and to the reflection of s light, transmission coefficient is more than or equal to 45 ° of 98%@, and reflection coefficient is more than or equal to 45 ° of 99.8%@; The 4th optical thin film F22 all reflects p light and s light, and reflection coefficient is more than or equal to 45 ° of 99.8%@, and the first prism top end face S14 is parallel to the 4th prism bottom face S24.
Half-wave plate B comprises the rear end face be arrangeding in parallel perpendicular to optical axis front end face, with front end face, the angle of half-wave plate B optical axis and vertical direction is 22.5 °, along in optical axis clockwise direction, half-wave plate B is 45 ° to the light rotation angle of p light, is 225 ° to the light rotation angle of s light.C is different from magneto-optical crystal, and when light process half-wave plate B, the sense of rotation of polarized light is relevant with the direction of propagation; The sense of rotation of backpropagation is contrary with the sense of rotation of forward-propagating.
As Fig. 1, shown in Fig. 4, a figure in Fig. 1 is forward index path, b figure is reverse optical path figure, Fig. 4 observes light transmission polarization variations schematic diagram in isolator for meeting light, wherein (a) figure is incident light, (b) figure is reflected light, the principle of work of optoisolator: in the time that a branch of natural light arrives the first cemented surface, p light will be through this face, s light will be reflected, in the time that arriving the second prism bottom face, the s light being reflected is reflected, two-beam p light and s light are respectively along OP, O ' P ' two-way enters magneto-optical crystal C, due to the result of Faraday effect, make the polarization direction of the two-beam seeing through from magneto-optical crystal C all to an angle that direction rotation is certain, this angle is 45 °.Because the polarization direction of two light beams all rotates same angle, the polarization direction of two-beam is still orthogonal.In two-way light path, add half-wave plate B, during through half-wave plate B, 45 ° of OP road light rotations, add 45 ° that in magneto-optical crystal C, rotate, and half-twist, becomes s light altogether; 225 ° of O ' P ' road light rotations, corotation turns 270 °, becomes p light.P light, through the reflection of prism top end face and the second cemented surface, merges with the s light from the second cemented surface transmission.Like this, the second cemented prism L2 is by s light and p light synthetic natural light again.In reflected light path, reflected light, after the second cemented prism L2, is divided into the mutually perpendicular polarized light in a pair of polarization direction, and what light path was forward-propagating is reverse, but after magneto-optical crystal C, its polarization direction rotation 45° angle; So, reflected light polarization direction has rotated 90 ° compared with incident light, and the p light on O ' P ' road upwards reflects while arriving the second prism bottom face, passes the first cemented surface from the first prism top end face S14 outgoing; The s light on OP road is reflected from the first prism top end face S14 outgoing by the first cemented surface, therefore reflected light is vertical with incident direction, can not be reflected back toward original optical path, has played catoptrical buffer action.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. an optoisolator, is characterized in that:
Comprise the first cemented prism, magneto-optical crystal, half-wave plate, the second cemented prism, be provided with the cavity of cavity;
The central shaft of described cavity is optical axis;
Described the first cemented prism, magneto-optical crystal, half-wave plate, the second cemented prism are set in turn on the central shaft in described cavity along optical path direction.
2. a kind of optoisolator as claimed in claim 1, is characterized in that:
Described the first cemented prism is by the first prism, form with fixing the second prism of described the first prism cementing;
Described the first prism and described the second prism end face are in opposite directions the first cemented surface, described the first cemented surface and optical axis angle at 45 °, and be coated with the first optical thin film on described the first cemented surface;
The the second prism bottom face be arrangeding in parallel with described the first cemented surface is provided with the second optical thin film;
Described the first prism top end face is parallel with optical axis.
3. a kind of optoisolator as claimed in claim 2, is characterized in that:
Described the first optical thin film is to the transmission of p light and to the reflection of s light, transmission coefficient is more than or equal to 45 ° of 98%@, and reflection coefficient is more than or equal to 45 ° of 99.8%@;
Described the second optical thin film all reflects p light and s light, and reflection coefficient is more than or equal to 45 ° of 99.8%@.
4. a kind of optoisolator as claimed in claim 3, is characterized in that:
Described the second cemented prism is by prism, form with fixing the 4th prism of described prism gummed;
Described prism and described the 4th prism end face are in opposite directions the second cemented surface, and described the second cemented surface and optical axis angle at 45 ° are coated with the 3rd optical thin film on described the second cemented surface;
On the prism top end face be arrangeding in parallel with described the second cemented surface, be coated with the 4th optical thin film;
Described the 4th prism bottom face is parallel to optical axis;
The angle of described the second cemented surface and described the 4th prism bottom face is 45 °.
5. a kind of optoisolator as claimed in claim 4, is characterized in that:
Described the 3rd optical thin film is to the transmission of p light and to the reflection of s light, transmission coefficient is more than or equal to 45 ° of 98%@, and reflection coefficient is more than or equal to 45 ° of 99.8%@;
Described the 4th optical thin film all reflects p light and s light, and reflection coefficient is more than or equal to 45 ° of 99.8%@.
6. a kind of optoisolator as claimed in claim 5, is characterized in that:
The angle of described half-wave plate optical axis and vertical direction is 22.5 °;
Along in optical axis clockwise direction, described half-wave plate is 45 ° to the light rotation angle of p light, is 225 ° to the light rotation angle of s light.
7. a kind of optoisolator as described in claim 5 or 6, is characterized in that:
Described the first prism top end face is parallel to described the 4th prism bottom face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410076649.1A CN103852825A (en) | 2014-03-04 | 2014-03-04 | Optical isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410076649.1A CN103852825A (en) | 2014-03-04 | 2014-03-04 | Optical isolator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103852825A true CN103852825A (en) | 2014-06-11 |
Family
ID=50860702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410076649.1A Pending CN103852825A (en) | 2014-03-04 | 2014-03-04 | Optical isolator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103852825A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466626A (en) * | 2014-12-04 | 2015-03-25 | 国家电网公司 | Low-polarization super-radiation light-emitting diode |
| CN105572916A (en) * | 2016-02-03 | 2016-05-11 | 深圳市镭神智能系统有限公司 | Opto-isolator |
| CN106932861A (en) * | 2017-05-10 | 2017-07-07 | 深圳市创鑫激光股份有限公司 | A kind of optoisolator and Optical devices |
| CN107561647A (en) * | 2017-10-30 | 2018-01-09 | 福建福晶科技股份有限公司 | A kind of orthogonal optoisolator of tail optical fiber |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080042050A1 (en) * | 2006-08-14 | 2008-02-21 | Fujitsu Limited Of | Polarization independent optical isolator and optical transmitting/receiving apparatus |
| KR20090093430A (en) * | 2008-02-29 | 2009-09-02 | 중앙대학교 산학협력단 | Optical isolator using surface plasmon resonance |
| CN103487888A (en) * | 2013-09-25 | 2014-01-01 | 深圳市创鑫激光技术有限公司 | Kilowatt-class online isolator |
| CN103499856A (en) * | 2013-09-23 | 2014-01-08 | 深圳市创鑫激光技术有限公司 | Hectowatt collimation type isolator |
| CN203759300U (en) * | 2014-03-04 | 2014-08-06 | 青岛海泰光电技术有限公司 | Optical isolator |
-
2014
- 2014-03-04 CN CN201410076649.1A patent/CN103852825A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080042050A1 (en) * | 2006-08-14 | 2008-02-21 | Fujitsu Limited Of | Polarization independent optical isolator and optical transmitting/receiving apparatus |
| KR20090093430A (en) * | 2008-02-29 | 2009-09-02 | 중앙대학교 산학협력단 | Optical isolator using surface plasmon resonance |
| CN103499856A (en) * | 2013-09-23 | 2014-01-08 | 深圳市创鑫激光技术有限公司 | Hectowatt collimation type isolator |
| CN103487888A (en) * | 2013-09-25 | 2014-01-01 | 深圳市创鑫激光技术有限公司 | Kilowatt-class online isolator |
| CN203759300U (en) * | 2014-03-04 | 2014-08-06 | 青岛海泰光电技术有限公司 | Optical isolator |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466626A (en) * | 2014-12-04 | 2015-03-25 | 国家电网公司 | Low-polarization super-radiation light-emitting diode |
| CN105572916A (en) * | 2016-02-03 | 2016-05-11 | 深圳市镭神智能系统有限公司 | Opto-isolator |
| CN106932861A (en) * | 2017-05-10 | 2017-07-07 | 深圳市创鑫激光股份有限公司 | A kind of optoisolator and Optical devices |
| CN106932861B (en) * | 2017-05-10 | 2018-06-29 | 深圳市创鑫激光股份有限公司 | A kind of optoisolator and Optical devices |
| CN107561647A (en) * | 2017-10-30 | 2018-01-09 | 福建福晶科技股份有限公司 | A kind of orthogonal optoisolator of tail optical fiber |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204143105U (en) | A kind of high power optical isolator of small size | |
| CN103217803A (en) | Polarization coupling device for semi-conductor laser device adopting prism | |
| US8565561B2 (en) | Polarization independent optical isolator | |
| US11693267B2 (en) | Single and multi-stage high power optical isolators using a single polarizing element | |
| CN103852825A (en) | Optical isolator | |
| US8891167B2 (en) | Polarization independent optical isolator | |
| GB1069470A (en) | Improvements in or relating to circulators for electromagnetic wave energy | |
| CN104656264A (en) | Polarization beam splitting and combining device | |
| CN105629386A (en) | Optical isolator | |
| CN203759300U (en) | Optical isolator | |
| US10962813B2 (en) | Optical isolator module | |
| CN107561647A (en) | A kind of orthogonal optoisolator of tail optical fiber | |
| CN102736275A (en) | Reflection-type magneto-optical switch | |
| CN203759301U (en) | Optical isolator with broadband spectrum and high damage threshold | |
| CN1268967C (en) | Miniature 2x2 magneto-optic switch | |
| CN201063082Y (en) | Polarization correlative isolater for free space | |
| CN211318893U (en) | Depolarization beam splitting device with air gap structure | |
| CN106019617B (en) | A kind of optically isolated beam merging apparatus | |
| CN202351448U (en) | Optical isolator | |
| CN208224531U (en) | A kind of optical fiber circulator of pole cramped construction | |
| CN102073143A (en) | Crystal polarizing, combining and splitting device | |
| CN208621863U (en) | A kind of reflection-type optical fiber laser isolator | |
| CN102495437A (en) | Ultraviolet high-performance polarization light splitting prism | |
| CN103869418A (en) | Broadband-spectrum high-damage-threshold optical isolator | |
| CN102902014B (en) | Optical isolator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140611 |
|
| RJ01 | Rejection of invention patent application after publication |