CN110398846A - The optoisolator and laser system that birefringent crystal beam deviates - Google Patents
The optoisolator and laser system that birefringent crystal beam deviates Download PDFInfo
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- CN110398846A CN110398846A CN201910428669.3A CN201910428669A CN110398846A CN 110398846 A CN110398846 A CN 110398846A CN 201910428669 A CN201910428669 A CN 201910428669A CN 110398846 A CN110398846 A CN 110398846A
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- 230000010287 polarization Effects 0.000 claims abstract description 116
- 230000003287 optical effect Effects 0.000 claims abstract description 66
- 208000004350 Strabismus Diseases 0.000 claims abstract description 45
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/09—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect
- G02F1/093—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect used as non-reciprocal devices, e.g. optical isolators, circulators
Abstract
The optoisolator and laser system deviateed the present invention relates to birefringent crystal beam.Optoisolator includes the BEAM SQUINT device one of Faraday polarization apparatus and one group or more, front end face near one group of BEAM SQUINT device one of Faraday polarization apparatus is sticked on the rear end face for being fixed on Faraday polarization apparatus, every group of BEAM SQUINT device one includes angle of wedge piece one and angle of wedge piece two, two inclined-planes in angle of wedge piece one and angle of wedge piece two are bonded to each other and two light pass surfaces are parallel to each other, and the optical axis of one of angle of wedge piece in angle of wedge piece one and angle of wedge piece two is parallel with its light pass surface or at angle perpendicular to the optical axis of its light pass surface and another angle of wedge piece.The optoisolator realizes the deflection of light of emergent light in the case where not changing incident angle and component thickness, to preventing from being coupled into laser with the selectively consistent backlight in laser polarization direction in reverse optical path, to overcome the disadvantages of existing in the prior art at high cost, lateral escaping amount is excessive or too small.
Description
Technical field
The present invention relates to optical communication and industrial optoisolator field, in particular to what a kind of birefringent crystal beam deviateed
Optoisolator and laser system.
Background technique
The design requirement for needing to deviate a polarization state light is frequently encountered in optical design, to reach light beam
Two polarization states separate purpose.The size of deflecting angle can be realized by changing angle of wedge size, but the angle of wedge is bigger, device
Thickness will be bigger.
Optoisolator is widely applied in optical communication and industrial lasers application field, is a kind of passive device of light of one-way transmission light
Part for allowing the positive light transmitted normal through this product, and is coupled to other optical transmission apparatus such as output optical waveguide, optical fiber
In, at the same prevent reverse transfer optically coupling in input waveguide, avoid optical system (especially laser) work
It is unstable.Line style (polarization is uncorrelated) and free space type (polarization is related) two classes are included in current practice, in laser
Mainly using free space type in device encapsulation (polarization is related).
A large amount of commercial free space isolators are formed using two panels polarizing film and a piece of 45 ° of Faraday polarization apparatus at present,
45 ° of faraday are placed between two panels polarizing film, and the polarization direction of two panels polarizing film differs 45 °.When the transmission of light forward direction, incident light
The part parallel with first polarizing film polarization direction is absorbed by the polarizer by polarizing film, the part vertical with polarization direction,
After entering Faraday polarization apparatus by the light of first polarizing film, 45 ° are rotated under Faraday effect effect, with second
The polarization direction of polarizing film is just parallel, therefore can pass through second polarizing film without loss.When light reverse transfer, with
The vertical part in two polarizing film polarization directions is directly absorbed by the polarizer, transmission that the part parallel with polarization direction is lossless,
Subsequently into Faraday polarization apparatus；It, will not be with light since the direction of rotation of Faraday polarization apparatus is only determined by magnetic direction
Incident direction and change, therefore continue on and rotate 45 ° of first polarizing films of arrival with identical direction when forward direction transmission, this time
Polarization state it is vertical with the polarization direction of the first polarizing film, light is absorbed by the first polarizing film, cannot be projected in input waveguide.But
It is the polarizing film higher cost of this design scheme.
Another new free space isolator mentality of designing is revolved using two panels birefringece crystal and a piece of 45 ° of faraday
Light device composition, 45 ° of faraday are placed between two panels birefringece crystal, the optical axis and incidence surface of first birefringece crystal at
45 ° of angles, light are transmitted in a manner of o light (ordinary light) in birefringece crystal, the optical axis direction of second birefringece crystal with
The optical axis direction of first birefringece crystal rotates 45 ° along paths axis, and light is in the second birefringece crystal equally with o light
Mode is transmitted.When the transmission of light forward direction, incident light is transmitted in the first birefringece crystal in a manner of o light, and it is fixed that optical path follows refraction
Rule is made by the first birefringece crystal subsequently into rotating 45 ° under Faraday effect effect after Faraday polarization apparatus
It is still maintained in the second birefringece crystal according to o light state, and optical path follows the law of refraction, exports the second birefringece crystal.
When light reverse transfer, 1) when light is mapped to the second birefringece crystal according to o illumination, optical path follows the law of refraction, relative to entering
O light is penetrated, passes through the second birefringece crystal to no relative displacement, after rotating 45 ° in Faraday polarization apparatus, light is two-fold first
The transmission mode penetrated in crystal becomes e light (non-ordinary light), and the transmission of optical path at this time does not follow the law of refraction, and due to optical axis with
Incidence surface has 45 ° of angles, so that deviation occur relative to incident o light, incident waveguide is deviateed in the output position of light, thus cannot
It is coupled in input waveguide, reaches isolation purpose；2) when light is mapped to the second birefringece crystal according to e illumination, the transmission of optical path
The law of refraction is not followed, and since optical axis and incidence surface there are 45 ° of angles, so that deviation occurs relative to incident o light, defeated
Lateral displacement occurs when the second birefringece crystal out, after rotating 45 ° in Faraday polarization apparatus, light is in the first birefringece crystal
Transmission mode become o light, the transmission in this time follows the law of refraction, be parallel to incident o light by the first birefringece crystal, because
Incident waveguide is deviateed in the lateral displacement amount that the final output position holding second of this light is formed when birefringent, output position, in turn
It cannot be coupled in input waveguide, reach isolation purpose.But since the refractive index of this crystal is very high, cause in practical applications
Excessive lateral escaping amount is generated, the difficulty that causes to couple and encapsulate increases.
It is using a piece of birefringece crystal and a piece of 45 ° of faraday there are also a kind of new free space isolator mentality of designing
Polarization apparatus composition, 45 ° of faraday are placed between laser and birefringece crystal.The optical axis of birefringece crystal is formed with optical direction
Angle, the polarization state direction optical axis of crystal of laser emitting light is the same as optical direction forming face angle at 45 °.Laser is revolved by faraday
Turn light device polarization state direction and turn 45 °, and is vertical with the face that optical direction is formed with birefringece crystal optical axis.Laser is in crystal at this time
In be o light, do not generate deviation angle, be directly over birefringece crystal from another side be emitted.And enter birefringece crystal in backlight
When, 1) the o light that is incident on birefringece crystal in parallel do not walk using after Faraday polarization apparatus, after polarization direction rotates 45 °, the road
The polarization direction of emergent light of polarization direction and laser of light is vertical, due to the polarization selectivity of laser itself, this road without
Method is coupled into laser.2) parallel is incident on the e light of birefringece crystal, due to the escaping of birefringece crystal, this road light
Red to go away an angle and transmit in crystal, again due to going away property when being emitted from crystal another side, which translates one
Escaping amount exiting parallel, then through Faraday polarization apparatus, after polarization state rotates 45 °, the selectivity of polarization direction and laser is inclined
Vibration direction is consistent, although polarization direction is consistent with the polarization direction of laser selectivity, due to this road, light has one to put down
It moves, as long as translational movement is sufficiently large, this road light, which cannot be reversed, is coupled into laser, to influence the stability of laser.
It is exactly to go away translational movement to want sufficiently large that this isolator, which has a defect, that is to say, that have sufficiently thick crystal thickness.For
The isolator for not having size and space to be marked, this scheme is good scheme, but existing industrial requirement is all to require device
The part the thin smaller good.Therefore this scheme also suffers from certain drawbacks.
Summary of the invention
The purpose of the present invention is to provide the optoisolator that a kind of birefringent crystal beam deviates, which uses method
The BEAM SQUINT device for drawing polarization apparatus and being made of two panels birefringece crystal angle of wedge piece is not changing incident angle and element thickness
The deflection of light that emergent light is realized in the case where degree, to prevent selectively consistent with laser polarization direction in reverse optical path
Backlight is coupled into laser, is lacked with overcoming at high cost, lateral escaping amount existing in the prior art excessive or too small etc.
Point.
Another object of the present invention is to provide a kind of laser system, which is equipped with optoisolator before laser, no
Only making backlight not influences the work of interference laser, and at low cost, and service performance is reliable.
The present invention is implemented as follows:
Scheme (one):
A kind of optoisolator that birefringent crystal beam deviates, it is characterised in that: the laser including being set to laser is sent out
It penetrates on direction and the BEAM SQUINT device one of the Faraday polarization apparatus set gradually from the near to the distant and one group or more, when light beam is inclined
When quantity from device one is more than two, each group BEAM SQUINT device one is successively mutually pasted along the Laser emission direction of laser
If fixed, the Faraday polarization apparatus can make the polarization state of laser rotate 45 °, and one group of light beam near Faraday polarization apparatus is inclined
Front end face from device one is sticked on the rear end face for being fixed on Faraday polarization apparatus, and every group of BEAM SQUINT device one includes angle of wedge piece
One and angle of wedge piece two, the angle of wedge piece one and angle of wedge piece two are birefringece crystal, in the angle of wedge piece one and angle of wedge piece two
Two inclined-planes are bonded to each other and two light pass surfaces are parallel to each other, one of angle of wedge piece in the angle of wedge piece one and angle of wedge piece two
Optical axis it is parallel with its light pass surface or at angle perpendicular to the optical axis of its light pass surface and another angle of wedge piece.
Further, the angle degree that the optical axis of the angle of wedge piece two and laser output polarised light project on the plane of incidence
Equal to the theoretical angle of rotation of Faraday polarization apparatus or the sum of 90 ° and theoretical optically-active angle number.
Reversed o light enters laser in order to prevent, and the optoisolator further includes before being sticked and being fixed on Faraday polarization apparatus
The polarization direction of polarizing film on end face, the polarizing film is consistent with the polarization direction of the emitted laser of laser.
In order to increase overall BEAM SQUINT angle, the optoisolator further includes one group of arrangement above in Faraday polarization apparatus
The BEAM SQUINT device two of front end, when the quantity of BEAM SQUINT device two is more than two, two edge of each group BEAM SQUINT device
The Laser emission direction of laser is successively mutually sticked fixation, near one group of BEAM SQUINT device two of Faraday polarization apparatus
Rear end face, which is sticked, to be fixed on the front end face of Faraday polarization apparatus, and every group of BEAM SQUINT device two includes angle of wedge piece three and angle of wedge piece
Four, the angle of wedge piece three and angle of wedge piece four are birefringece crystal, two inclined-plane phases in the angle of wedge piece three and angle of wedge piece four
It is mutually bonded and two light pass surfaces is parallel to each other, the angle of wedge piece three is vertical with the optical axis of one of angle of wedge piece in angle of wedge piece four
It is parallel with its light pass surface or at angle in the optical axis of its light pass surface and another angle of wedge piece.
Scheme (two):
A kind of laser system, it is characterised in that: including laser and optoisolator, the optoisolator is located at laser
Laser emission direction on.
For the prior art, the invention has the following advantages that
(1) optoisolator that birefringent crystal beam provided by the invention deviates, the optoisolator use Faraday
Device and the BEAM SQUINT device being made of two panels birefringece crystal angle of wedge piece, the case where not changing incident angle and component thickness
It is lower realize emergent light deflection of light, thus prevent in reverse optical path with the selectively consistent backlight quilt in laser polarization direction
It is coupled into laser, to overcome the disadvantages of existing in the prior art at high cost, lateral escaping amount is excessive or too small；
(2) optoisolator that birefringent crystal beam provided by the invention deviates, between Faraday polarization apparatus and laser
It is additionally provided with polarizing film, can prevent reversed o light from entering laser；
(3) optoisolator that birefringent crystal beam provided by the invention deviates is additionally provided with one group before Faraday polarization apparatus
Above BEAM SQUINT device, increases the deflecting angle of overall light beam；
(4) provided by the invention kind of laser system, the system are equipped with optoisolator before laser, not only make backlight
The work of interference laser is not influenced, and at low cost, service performance is reliable.
Detailed description of the invention
The invention will be further described in conjunction with the embodiments with reference to the accompanying drawings:
Fig. 1 is the deviation mechanism and optical axis direction design diagram (n of e light in BEAM SQUINT device in the present inventione>
no), wherein Fig. 1 a is deviation mechanism schematic diagram, and Fig. 1 b is the side view of angle of wedge piece two, and Fig. 1 c is another optical axis of angle of wedge piece two
(side of optical axis and angle of wedge piece two is angled for the schematic diagram of design)；
Fig. 2 is the deviation mechanism and optical axis direction design diagram (n of e light in BEAM SQUINT device in the present inventione<
no), wherein Fig. 2 a is deviation mechanism schematic diagram, and Fig. 2 b is the side view of angle of wedge piece two, and Fig. 2 c is another optical axis of angle of wedge piece two
(side of optical axis and angle of wedge piece two is angled for the schematic diagram of design)；
Fig. 3 be the optical axis of angle of wedge piece two in BEAM SQUINT device in the present invention be designed as with e light light angle γ, add
Enter deviation angle, to increase the schematic diagram of e light deflection angle [alpha]；
Fig. 4 is the schematic diagram of the embodiment of the present invention 1, and wherein Fig. 4 a is the structural schematic diagram of optoisolator, and Fig. 4 b is the angle of wedge
The side view of piece two, Fig. 4 c are positive (from left to right) polarization state schematic diagram, and Fig. 4 d is that reversed (from right to left) o polarization state shows
It is intended to, Fig. 4 e is reversed (from right to left) e polarization state schematic diagram；
Fig. 5 is the schematic diagram of the embodiment of the present invention 2, and wherein Fig. 5 a is the structural schematic diagram of optoisolator, and Fig. 5 b is the angle of wedge
The side view of piece two, Fig. 5 c are positive (from left to right) polarization state schematic diagram, and Fig. 5 d is that reversed (from right to left) o polarization state shows
It is intended to, Fig. 5 e is reversed (from right to left) e polarization state schematic diagram；
Fig. 6 is the schematic diagram of the embodiment of the present invention 3, and wherein Fig. 6 a is the structural schematic diagram of optoisolator, and Fig. 6 b is polarization
The side view of piece, Fig. 6 c are the side view of angle of wedge piece two, and Fig. 6 d is positive (from left to right) polarization state schematic diagram, and Fig. 6 e is anti-
To (from right to left) o polarization state schematic diagram, Fig. 6 f is reversed (from right to left) e polarization state schematic diagram；
Fig. 7 is the schematic diagram of the embodiment of the present invention 4, and wherein Fig. 7 a is the structural schematic diagram of optoisolator, and Fig. 7 b is polarization
The side view of piece, Fig. 7 c are the side view of angle of wedge piece two, and Fig. 7 d is positive (from left to right) polarization state schematic diagram, and Fig. 7 e is anti-
To (from right to left) o polarization state schematic diagram, Fig. 7 f is reversed (from right to left) e polarization state schematic diagram；
Fig. 8 is the schematic diagram of the embodiment of the present invention 5, and wherein Fig. 8 a is the structural schematic diagram of optoisolator, and Fig. 8 b is the angle of wedge
The side view of piece four, Fig. 8 c are the side view of angle of wedge piece two, and Fig. 8 d is positive (from left to right) polarization state schematic diagram, and Fig. 8 e is anti-
To (from right to left) o polarization state schematic diagram, Fig. 8 f is reversed (from right to left) e polarization state schematic diagram；
Fig. 9 is the schematic diagram of the embodiment of the present invention 6, and wherein Fig. 9 a is the structural schematic diagram of optoisolator, and Fig. 9 b is the angle of wedge
The side view of piece four, Fig. 9 c are the side view of angle of wedge piece two, and Fig. 9 d is positive (from left to right) polarization state schematic diagram, and Fig. 9 e is anti-
To (from right to left) o polarization state schematic diagram, Fig. 9 f is reversed (from right to left) e polarization state schematic diagram；
Figure 10 is the schematic diagram of the embodiment of the present invention 7, and wherein Figure 10 a is the structural schematic diagram of optoisolator, and Figure 10 b is positive
To (from left to right) polarization state schematic diagram, Figure 10 c is reversed (from right to left) o polarization state schematic diagram, Figure 10 d be it is reversed (from
The right side a to left side) e polarization state schematic diagram；
Figure 11 is the schematic diagram of the embodiment of the present invention 8, and wherein Figure 11 a is the structural schematic diagram of optoisolator, and Figure 11 b is positive
To (from left to right) polarization state schematic diagram, Figure 11 c is reversed (from right to left) o polarization state schematic diagram, Figure 11 d be it is reversed (from
The right side a to left side) e polarization state schematic diagram；
Figure 12 is the schematic diagram of the embodiment of the present invention 9, and wherein Figure 12 a is the structural schematic diagram of laser system, and Figure 12 b is positive
To (from left to right) polarization state schematic diagram, Figure 12 c is reversed (from right to left) o polarization state schematic diagram, Figure 12 d be it is reversed (from
The right side a to left side) e polarization state schematic diagram.
Symbol description in figure: 1, laser, 2, Faraday polarization apparatus, 3, BEAM SQUINT device one, 31, angle of wedge piece one, 32,
Angle of wedge piece two, 4, polarizing film, 5, BEAM SQUINT device two, 51, angle of wedge piece three, 52, angle of wedge piece four.
Specific embodiment
The content of present invention is described in detail with specific embodiment with reference to the accompanying drawings of the specification:
Embodiment 1:
It is illustrated in figure 4 the optoisolator that a kind of birefringent crystal beam provided by the invention deviates, including is set to sharp
On the Laser emission direction of light device 1 and the Faraday polarization apparatus 2 set gradually from the near to the distant and one group of BEAM SQUINT device one
3, the Faraday polarization apparatus 2 can make the polarization state of laser rotate 45 °, and the front end face of BEAM SQUINT device 1, which is sticked, to be fixed on
On the rear end face of Faraday polarization apparatus 2, BEAM SQUINT device 1 includes angle of wedge piece 1 and angle of wedge piece 2 32, the angle of wedge piece
1 and angle of wedge piece 2 32 be birefringece crystal, two inclined-planes in the angle of wedge piece 1 and angle of wedge piece 2 32 are bonded to each other
And two light pass surfaces are parallel to each other, the light of the optical axis of the angle of wedge piece 1 perpendicular to its light pass surface, in the angle of wedge piece 2 32
Axis is parallel with its light pass surface.The angle that optical axis and laser 1 the output polarised light of the angle of wedge piece 2 32 project on the plane of incidence
Degree is equal to the theoretical angle of rotation or the sum of 90 ° and theoretical optically-active angle number of Faraday polarization apparatus 2.In the present embodiment, light beam
Deviate device one 3 and set one group, naturally it is also possible to which multiple groups are set, when the quantity of BEAM SQUINT device 1 is more than two, respectively
Group BEAM SQUINT device 1 is successively mutually sticked fixation along the Laser emission direction of laser 1, near Faraday polarization apparatus 2
The front end face of one group of BEAM SQUINT device 1 be sticked on the rear end face for being fixed on Faraday polarization apparatus 2.
It is as shown in Figure 1 and Figure 2 the deflection of light mechanism of birefringece crystal angle of wedge piece 1 and angle of wedge piece 2 32, the present invention
Using e light in birefringece crystal relative to o light angle of wedge face generate deviation the phenomenon that, carry out polarization-dependent optical design in e light
The design of deviation reaches the design at different e light deflection angles by adjusting angle of wedge different size.The calculation formula of deflection angle is such as
Under:
α: such as Fig. 1, e light deflection angle shown in 2,3
θ: the angle of wedge angle of birefringece crystal as shown in drawings
ne: the e optical index of birefringece crystal
no: the e optical index of birefringece crystal
Due to different birefringece crystals, ne,noSize relation is different, some ne> no, some ne< no, two kinds of situations
When, the deviation direction of e light is different, as shown in figures 1 and 2.
Generally, in birefringece crystal angle of wedge piece group, the optical axis of angle of wedge piece 1 is parallel with optical transmission direction, i.e., with it is double
The light pass surface of refracting crystal is vertical, and the optical axis direction of angle of wedge piece 2 32 is generally parallel with the light pass surface of angle of wedge piece 2 32, i.e., with o light
Transmission direction is vertical, at the same optical axis direction can with the side of angle of wedge piece 2 32 atRandom angle, such as Fig. 1,
Shown in 2.It is typically that optical axis is facilitated to demarcate and process, usually willAngle is designed as 45 ° or 90 °.
As shown in figure 3, to realize that bigger e light deflection angle α, the optical axis of birefringece crystal angle of wedge piece 2 32 can be used
With transmission ray direction of the e light in angle of wedge piece 2 32 at the angle γ, so that e light is further added by the deviation angle of a birefringece crystal.
The not of uniform size of γ design can generate different deviation angles, be typically designed the angle γ when Shi Douhui takes digression maximum away, different
The angle γ when the deviation angle maximum of birefringece crystal is different.
Embodiment 2:
Referring to Fig. 5, embodiment 2 the difference from embodiment 1 is that: as shown in Figure 5 b, the optical axis and the angle of wedge of angle of wedge piece 2 32
Right edge is at any angle β.
Embodiment 3:
As shown in fig. 6, embodiment 3 the difference from embodiment 1 is that: the optoisolator further includes being sticked to be fixed on farad
Polarizing film 4 on 2 front end face of polarization apparatus, the polarization direction of the polarizing film 4 and the polarization direction of the emitted laser of laser 1
Unanimously.In the present embodiment, as shown in Figure 6 a, the polarization direction of polarizing film 4 and right edge are at 45 °.Polarizing film 4 can prevent instead
Enter laser 1 to o light.
Embodiment 4:
Referring to Fig. 7, embodiment 4 and the difference of embodiment 3 are: as shown in Figure 7 c, the optical axis and the angle of wedge of angle of wedge piece 2 32
Side is at 45 °, and as shown in Figure 7b, the polarization direction of polarizing film 4 is parallel with side.
Embodiment 5:
As shown in figure 8, embodiment 5 the difference from embodiment 1 is that: the optoisolator further includes one group and is set to farad
The BEAM SQUINT device 25 of 2 front end of polarization apparatus, the rear end face that beam deviates device 25, which is sticked, is fixed on Faraday polarization apparatus 2
On front end face, every group of BEAM SQUINT device 25 includes angle of wedge piece 3 51 and angle of wedge piece 4 52, the angle of wedge piece 3 51 and the angle of wedge
Piece 4 52 is birefringece crystal, and two inclined-planes in the angle of wedge piece 3 51 and angle of wedge piece 4 52 are bonded to each other and two logical
Smooth surface is parallel to each other, and the optical axis of one of angle of wedge piece in the angle of wedge piece 3 51 and angle of wedge piece 4 52 is perpendicular to its light pass surface
And the optical axis of another angle of wedge piece is parallel with its light pass surface or at angle.In the present embodiment, only in 2 front end of Faraday polarization apparatus
One group of BEAM SQUINT device 25 is set, naturally it is also possible to multiple groups be arranged, when the quantity of BEAM SQUINT device 25 is more than two
When, each group BEAM SQUINT device 25 is successively mutually sticked fixation along the Laser emission direction of laser 1, revolves near faraday
The rear end face of one group of BEAM SQUINT device 25 of light device 2 is sticked on the front end face for being fixed on Faraday polarization apparatus 2.Such as Fig. 8 b institute
Show, the optical axis and left side of angle of wedge piece 4 52 are at 45 °, and as shown in Figure 8 c, the optical axis of angle of wedge piece 2 32 is parallel with side.
Embodiment 6:
Referring to Fig. 9, embodiment 6 and the difference of embodiment 5 are: as shown in figure 9b, the optical axis of angle of wedge piece 4 52 and side
In parallel, as is shown in fig. 9 c, the optical axis of angle of wedge piece 2 32 and right edge are at 45 °.
Embodiment 7:
Referring to Fig.1 0, embodiment 7 the difference from embodiment 1 is that: incident light and light pass surface out of plumb.
Embodiment 8:
Referring to Fig.1 1, embodiment 8 the difference from embodiment 1 is that: incident light and light pass surface out of plumb.
Embodiment 9:
It is as shown in figure 12 a kind of laser system provided by the invention, it is characterised in that: including laser 1 and optical isolation
Device, the optoisolator are located on the Laser emission direction of laser 1.Optoisolator includes the laser hair for being set to laser 1
The Faraday polarization apparatus 2 and one group of BEAM SQUINT device 1 penetrated on direction and set gradually from the near to the distant, faraday's rotation
Light device 2 can make the polarization state of laser rotate 45 °, and the front end face of BEAM SQUINT device 1, which is sticked, is fixed on Faraday polarization apparatus 2
On rear end face, BEAM SQUINT device 1 includes angle of wedge piece 1 and angle of wedge piece 2 32, the angle of wedge piece 1 and angle of wedge piece 2 32
It is birefringece crystal, two inclined-planes in the angle of wedge piece 1 and angle of wedge piece 2 32 are bonded to each other and two light pass surfaces are mutual
In parallel, for the optical axis of the angle of wedge piece 1 perpendicular to its light pass surface, the optical axis in the angle of wedge piece 2 32 is parallel with its light pass surface.
In the present embodiment, optoisolator uses the optoisolator of embodiment 1, naturally it is also possible to using any one in embodiment 2-8
Kind.
Above-mentioned specific embodiment is only explained in detail technical solution of the present invention, the present invention not only only office
It is limited to above-described embodiment, all any improvement or replacement according to the principle of the invention should all be within protection scope of the present invention.
Claims (5)
1. the optoisolator that a kind of birefringent crystal beam deviates, it is characterised in that: the laser including being set to laser (1) is sent out
It penetrates on direction and the BEAM SQUINT device one (3) of the Faraday polarization apparatus (2) set gradually from the near to the distant and one group or more, when
When the quantity of BEAM SQUINT device one (3) is more than two, each group BEAM SQUINT device one (3) is sent out along the laser of laser (1)
It penetrates direction to be successively mutually sticked fixation, the Faraday polarization apparatus (2) can make the polarization state of laser rotate 45 °, near farad
The front end face of one group of BEAM SQUINT device one (3) of polarization apparatus (2), which is sticked, is fixed on the rear end face of Faraday polarization apparatus (2)
On, every group of BEAM SQUINT device one (3) includes angle of wedge piece one (31) and angle of wedge piece two (32), the angle of wedge piece one (31) and the angle of wedge
Piece two (32) is birefringece crystal, and two inclined-planes in the angle of wedge piece one (31) and angle of wedge piece two (32) are bonded to each other and two
A light pass surface is parallel to each other, the optical axis of one of angle of wedge piece in the angle of wedge piece one (31) and angle of wedge piece two (32) perpendicular to
The optical axis of its light pass surface and another angle of wedge piece is parallel with its light pass surface or at angle.
2. the optoisolator that birefringent crystal beam according to claim 1 deviates, it is characterised in that: the angle of wedge piece two
(32) the angle degree that optical axis and laser (1) output polarised light projects on the plane of incidence is equal to Faraday polarization apparatus (2)
Theoretical angle of rotation or the sum of 90 ° and theoretical optically-active angle number.
3. the optoisolator that birefringent crystal beam according to claim 1 deviates, it is characterised in that: the optoisolator
Further include the polarizing film (4) being fixed on Faraday polarization apparatus (2) front end face that is sticked, the polarization direction of the polarizing film (4) with
The polarization direction of laser (1) emitted laser is consistent.
4. the optoisolator that birefringent crystal beam according to claim 1 deviates, it is characterised in that: the optoisolator
It further include one group of arrangement above in the BEAM SQUINT device two (5) of Faraday polarization apparatus (2) front end, when BEAM SQUINT device two
(5) when quantity is more than two, each group BEAM SQUINT device two (5) is successively mutual along the Laser emission direction of laser (1)
Be sticked fixation, is sticked near the rear end face of one group of BEAM SQUINT device two (5) of Faraday polarization apparatus (2) and is fixed on faraday
On the front end face of polarization apparatus (2), every group of BEAM SQUINT device two (5) includes angle of wedge piece three (51) and angle of wedge piece four (52), described
Angle of wedge piece three (51) and angle of wedge piece four (52) are birefringece crystal, two in the angle of wedge piece three (51) and angle of wedge piece four (52)
A inclined-plane is bonded to each other and two light pass surfaces are parallel to each other, one of them in the angle of wedge piece three (51) and angle of wedge piece four (52)
The optical axis of angle of wedge piece is parallel with its light pass surface or at angle perpendicular to the optical axis of its light pass surface and another angle of wedge piece.
5. a kind of laser system, it is characterised in that: including laser (1) and light of any of claims 1-4 every
From device, the optoisolator is located on the Laser emission direction of laser (1).
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| CN201910428669.3A CN110398846A (en) | 2019-05-22 | 2019-05-22 | The optoisolator and laser system that birefringent crystal beam deviates |
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| CN201910428669.3A CN110398846A (en) | 2019-05-22 | 2019-05-22 | The optoisolator and laser system that birefringent crystal beam deviates |
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