CN110471147A - The device and method of big angle of divergence laser coupled single mode optical fiber - Google Patents
The device and method of big angle of divergence laser coupled single mode optical fiber Download PDFInfo
- Publication number
- CN110471147A CN110471147A CN201910812082.2A CN201910812082A CN110471147A CN 110471147 A CN110471147 A CN 110471147A CN 201910812082 A CN201910812082 A CN 201910812082A CN 110471147 A CN110471147 A CN 110471147A
- Authority
- CN
- China
- Prior art keywords
- light
- laser
- optical fiber
- hot spot
- prism
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4219—Mechanical fixtures for holding or positioning the elements relative to each other in the couplings; Alignment methods for the elements, e.g. measuring or observing methods especially used therefor
- G02B6/422—Active alignment, i.e. moving the elements in response to the detected degree of coupling or position of the elements
- G02B6/4221—Active alignment, i.e. moving the elements in response to the detected degree of coupling or position of the elements involving a visual detection of the position of the elements, e.g. by using a microscope or a camera
- G02B6/4222—Active alignment, i.e. moving the elements in response to the detected degree of coupling or position of the elements involving a visual detection of the position of the elements, e.g. by using a microscope or a camera by observing back-reflected light
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
A kind of the present invention provides structures simple, the small in size and device and method of big angle of divergence laser coupled single mode optical fiber that economizes on resources.In the present invention, the light that laser issues is divided into transmitted ray and reflection light after collimating mirror collimates after Amici prism；After reflection light therein is incident on prism of corner cube, is absorbed after former road reflection by industrial camera and form reference light hot spot；The transmitted ray that Amici prism separates enters microcobjective, it is incident in optical fiber after convergence, the coupled end of optical fiber is reflected in face of a part of incident light, after the part reflection light returns to Amici prism along original route, coupling light hot spot is formed after the reflective surface of Amici prism, after being absorbed by industrial camera；When coupling light hot spot and reference light hot spot is completely coincident, in the fiber coupling to optical fiber of laser emitting, otherwise, the pose of optical fiber is adjusted, until coupling light hot spot is completely coincident with reference light hot spot.Present invention can apply to field fibers.
Description
Technical field
The present invention relates to field fiber more particularly to a kind of device and methods of big angle of divergence laser coupled single mode optical fiber.
Background technique
Optical fiber cable communication is the prevailing transmission mode of modern communications Transmission system, and the development history of optical fiber cable only has one or two
10 years, it experienced upgrading three times: short wavelength's multimode fiber optic cable, long wavelength's multimode fiber optic cable and long-wavelength single-mode optical fiber light
Cable.Fibre Optical Communication Technology is as a kind of completely new information transmission technology, it has also become the Primary communication mode of modern communications, Ji Huqu
For traditional copper cableless communication technology, very important effect is played in Modern Information Network, at present in numerous areas and industry
Middle application becomes the important means for promoting communication quality and efficiency, has pushed the revolution of human sciences' technology.Using optical fiber cable
Communication is a major transformation in telecommunication transmission system, and the communication of China's optical fiber cable has entered the practical stage at present.With me
The fast development of social economy, state, the Fibre Optical Communication Technology in China achieve very important achievement, not only promote person to person it
Between communication efficiency comprehensively promoted, and can guarantee modernization, intelligent automation development in an all-round way.
It announces no longer to build copper cable communication line in addition, having multiple countries now, and is dedicated to developing optical fiber cable communication.
Fiber optic communication has many advantages, such as that message capacity is big, loss is low, transmission range is long, anti-electromagnetic interference capability is strong.By light
Transmission mode in a fiber can be divided into single mode optical fiber and multimode fibre.Multimode fibre (Multi Mode Fiber): center glass
Glass core is relatively thick (50 or 62.5 μm), can transmit the light of various modes.But its intermode dispersion is larger, and which limits transmission number letters
Number frequency, and can be more serious with the increase of distance.Such as: the optical fiber of 600MB/KM then only has the band of 300MB in 2KM
It is wide.Therefore, the distance of multimode fibre transmission is with regard to closer, and generally only several kilometers.Single mode optical fiber (Single Mode
Fiber): centre pane core is very thin (core diameter is generally 9 or 10 μm), can only pass the light of one mode.Therefore, intermode dispersion is very
It is small, it is suitable for telecommunication, due to the good optical transmission property of single mode optical fiber, and most of optical device is all based on single mode
Optical fiber, more and more scenes are used in single mode optical fiber.In practical applications, the free space that laser issues is optically coupled into
It is the most key one of step into optical fiber, the height of coupling efficiency determines the size in fiber-optic output energy, due to
The core diameter of single mode optical fiber is relatively narrow, how as much as possible be coupled in optical fiber of light that laser is issued is become a big difficulty.
In coupling, it is ensured that the laser that laser is issued needs to pay attention to the following completely into optical fiber: 1, the cone angle of laser beam
It is less than the maximum acceptance angle of optical fiber, otherwise total reflection cannot be met, is lost very big.2, laser beam will be perpendicular to optical fiber end
Face.3, fiber end face wants clean.4, laser beam and fiber end face are preferably concentric.5, laser facula is less than optical fiber core diameter.
Conventional coupling process includes vibration mirror scanning method and autocollimation method at present.Vibration mirror scanning method therein is to pass through scanning
Mode find the exact position that hot spot is in fiber end face, optical fiber is fixed on piezoelectric ceramics, pass through driving two-dimensional piezoelectric
Ceramics control fiber end face, the voltage being applied on piezoelectric ceramics is allowed to generate the movement in micron dimension, to drive optical fiber
It is allowed to position and generates variation, realize that spatial light-fiber coupling is automatically aligned in conjunction with simulated annealing, Automatic-searching is realized in positioning
Best Coupling point.But the process needs the control system for alignment --- two-dimensional piezoelectric ceramics, feedback system and control algolithm,
Voltage is obtained as evaluation index come Real-time Feedback voltage by photodetector, and then drives two-dimensional piezoelectric ceramics, forms one
Complete photoelectricity closed-loop control system is covered, process is comparatively laborious, has higher requirement for algorithm, needs additionally to develop a whole set of
System, existing resource cannot be integrated.The noise of circuit also will affect the precision of contraposition.
In the patent document of 108663758 A of Publication No. CN, a kind of utilization parallel light tube collimation laser is proposed,
Accurately laser coupled can be compared.But the program is high for the processing request of instrument, only the focal length of parallel light tube
5m is just reached, has caused the size of single unit system in 5m or more, the equipment of auxiliary para must stay in coupling after the completion of use
In light combination road, the waste etc. of equipment is caused.So being dfficult to apply to industrial circle.And it is only suitable only for coupling from laser institute
The quasi-parallel light issued can not be applied to the laser of the larger angle of divergence issued from semiconductor chip.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a kind of structure it is simple, it is small in size,
The device of big angle of divergence laser coupled single mode optical fiber for being suitable for the laser light source of a variety of dispersion angles and economizing on resources, and should
Device carries out laser coupled to the method for optical fiber, and this method is easy to operate, and laser can be coupled in optical fiber completely, coupling accuracy
It is high and high-efficient.
The device of big angle of divergence laser coupled single mode optical fiber of the present invention the technical solution adopted is that: it includes to be coupled
Enter optical fiber and the laser with the big angle of divergence, it further includes the collimating mirror being successively set on the optical axis of the laser, divides
The coupling end face of light prism and microcobjective, the optical fiber is set in the focus of the microcobjective, the hair of the laser
Smooth surface is set at the object focus of the collimating mirror, and the Amici prism is arranged on the emitting light path of the collimating mirror, institute
It states microcobjective to be arranged in the light transmission optical path of the Amici prism, be set on the emitting light path of the reflected light of the Amici prism
It is equipped with prism of corner cube, is additionally provided with industry on the other side in the Amici prism and the reflected light path positioned at the prism of corner cube
Camera.
Above scheme is as it can be seen that laser issues laser, and laser becomes after collimating mirror collimation and laser optical axis
Parallel collimated light beam is being divided into transmitted light and reflected light by Amici prism, and reflected light therein is anti-by Amici prism
After entering the prism of corner cube after penetrating, backtracking is pressed after reflection, after the transmission of the Amici prism, by the industry
Camera absorbs and forms reference light hot spot；The light beam of the Amici prism another way transmission, which directly reaches, is set to the micro- of distal end
On object lens, fiber end face is reached after the convergence of microcobjective, most light will be coupled into the optical fiber, but have few
Partial light is reflected in fiber end face, and the part light of reflection presses backtracking, by anti-after reaching the Amici prism
It is received after penetrating the reflection in face by the industrial camera, and forms coupling light hot spot in industrial camera, by adjusting coupling light light
Spot is overlapped it with reference light hot spot, and then determines that laser is consistent in face of position with the coupled end of optical fiber, ensure that laser is sent out
The light beam coupling penetrated enters in optical fiber, in this process, the collimating mirror of application, Amici prism, prism of corner cube, industrial camera, micro-
Object lens etc. are conventional component, do not need additional customized, and cost is greatly saved；Debug also relatively simple, the weight of element
Amount and volume are all smaller, not only can be made and have manually adjusted board, but also have reserved space for the automation of integral device；With price
Expensive and enormous size parallel light tube is compared, and the volume and cost reorganized and outfit are considerably reduced；The present invention utilizes Amici prism
Draw a branch of reference light, as debugging pilot process in evaluation criterion, debugging when have the evaluation criterion be used as with reference to according to
According to, can be quick as long as whether the coupling light hot spot for judging that the reflected light of fiber end face is formed is overlapped with reference light hot spot
Ground judges that laser beam is coupled into optical fiber, finds out the maximum position of energy in a large area point by point scanning with conventional method
Mode compare, the configuration of the present invention is simple, and coupling process is quick, greatly improves operating efficiency；In addition, the setting of collimating mirror
The light beam that can emit the laser with the big angle of divergence collimates, and the light after collimation can satisfy Amici prism transmission
With the requirement of reflection, guarantee is provided for subsequent laser coupled.
Further, the collimating mirror is non-globe lens, and is provided in light pass surface and to swash with the laser emitting
The compatible anti-reflection film of the wavelength of light, the vertical missing between the collimating mirror and the optical axis of the laser is less than 5 ".Thus
As it can be seen that, since non-globe lens has more preferably radius of curvature, good aberration can be maintained to repair using non-globe lens as collimating mirror
Just, to obtain required performance, therefore it can bring outstanding acutance and higher resolution ratio, mention for laser coupled optical fiber
For better environment；Anti-reflection film further reduces the generation of veiling glare, avoids causing coupling result adverse effect, and guarantees quasi-
Vertical missing between straight mirror and the optical axis of the laser can guarantee coupling accuracy.
Still further, the Amici prism is beam splitter, the reflection and transmission ratio R:T range of the Amici prism is 10:
90~50:50.It can be seen that can satisfy the requirement for generating reflected light and transmitted light using beam splitter as Amici prism, and divide
Shu Jing also greatly drops compared with existing at high price and enormous size parallel light tube as a kind of conventional optical lens
Low cost；And the range of the reflection and transmission ratio of beam splitter is optional, and the decoupling calls of different wave length laser can be satisfied.
Further, the plane of incidence of the prism of corner cube is provided with mutually fits with the wavelength of the laser of the laser emitting
The anti-reflection film matched, the vertical missing between the prism of corner cube and the optical axis of the laser is less than 5 ".It can be seen that passing through increasing
The setting of permeable membrane decreases the increase of the veiling glare at prism of corner cube, guarantees the precision for the reference light hot spot that industrial camera obtains；
Meanwhile guaranteeing that the vertical missing between prism of corner cube and the optical axis of the laser can guarantee coupling accuracy.
Again further, the numerical aperture of the light converged through the microcobjective is less than or equal to the numerical value of the optical fiber
Aperture.Thereby guaranteeing that can all be coupled into optical fiber by the light of microcobjective convergence, guarantee coupling mass.
In addition, the microcobjective is infrared objective, the optical fiber is FC/PC Interface Fiber either naked fibre.Thus may be used
See, infrared objective can satisfy the effect of the convergence to laser beam as microcobjective, guarantee going on smoothly for coupling；Optical fiber
Selection can there are many, indicate the present invention have versatility, be able to satisfy decoupling calls for different optical fiber.
Further, the reflection and transmission ratio R:T of the Amici prism is 10:90.It can be seen that the lower reflection of selection is saturating
Penetrate the coupling efficiency more last than that can guarantee optical fiber.
In addition, including by the method for laser coupled to optical fiber using the device of above-mentioned big angle of divergence laser coupled single mode optical fiber
Following steps:
A. the light that the laser issues is divided into transmitted ray and anti-after collimating mirror collimation after the Amici prism
Penetrate light；
B. it after reflection light therein is incident on the prism of corner cube, is absorbed after former road reflection by the industrial camera and forms ginseng
Examine light hot spot；
C. the transmitted ray that the Amici prism separates enters the microcobjective, is incident in the optical fiber after convergence,
The coupled end of the optical fiber is reflected in face of a part of incident light, which returns to along original route
After the Amici prism, after the reflective surface of the Amici prism, coupling light light is formed after being absorbed by the industrial camera
Spot；
D. when the coupling light hot spot and the reference light hot spot fit like a glove, the fiber coupling of the laser emitting to institute
It states in optical fiber, otherwise, enters step E；
E. the pose of the optical fiber is adjusted, until the coupling light hot spot fits like a glove with the reference light hot spot, this
When, in the fiber coupling to the optical fiber of the laser emitting.
It can be seen that passing through these conventional members of collimating mirror, Amici prism, prism of corner cube, industrial camera and microcobjective
Device, the device of the organizing cost invention laser coupled optical fiber, separates transmitted light and reflected light using Amici prism, reflects
Light forms reference light hot spot after prism of corner cube reflects on industrial camera, and transmitted light is arrived after microcobjective converges
Up to fiber end face, and by the reflection of fiber end face, part reflected light is pressed backtracking, is re-started after reaching Amici prism
Reflection forms coupling light hot spot after reaching industrial camera, by being overlapped journey between judgement coupling light hot spot and reference light hot spot
Degree, and the three-dimensional pose of optical fiber is adjusted, it is completely coincident coupling light hot spot with reference light hot spot, so that laser and optical fiber
Coupled end it is consistent in face of position, to realize laser that laser issues to the coupling of optical fiber, this method is easy to operate, and row
Effectively, by test, laser can all be coupled into optical fiber, compared to the prior art, equipment cost be greatly saved, also mentions
Coupling efficiency has been risen, equipment volume is reduced；What be can be convenient after completing fiber coupling removes equipment, will not set because of coupling
Standby presence and the loss for causing energy, ensure that coupling mass.
Further, in the laser and the Amici prism there are in the case where installation deviation, the industrial camera
Half field-of-view's angle beta and the size of detector target surface B determine according to the following steps:
F. when the centre of luminescence of laser deviates the focus of the collimating mirror and positioned at the certain point of the focal plane of the collimating mirror
When place, if the distance of the distance focal point is A, there are one for the optical axis of directional light and the laser that the laser issues
A angle, the angle be, wherein f1For the focal length of collimating mirror；
G. the optical axis for setting the Amici prism and the laser reaches the error angle of the state of being mutually perpendicular to as γ, then the work
Half field-of-view's angle beta of industry camera need to meet β >=γ+, if the lens focus of the industrial camera be f2, then the spy of the industrial camera
The size B for surveying device target surface need to meet B >=2*f2*tanβ。
Above scheme as it can be seen that when occur component installation it is not in place when, coupling process can be repaired through the above steps
Just, guarantee coupling effect.
Still further, setting the angle of divergence of the laser as 2 θ, then the illumination that the laser issues is mapped to the standard
The spot diameter d generated on straight mirror needs to meet, wherein f1For the focal length of collimating mirror.It can be seen that the light issued according to laser
The size of the components such as the spot diameter collimation mirror of formation is defined, to guarantee that luminous energy is fully coupled into optical fiber,
Optical signal is avoided to receive infull phenomenon.
Detailed description of the invention
Fig. 1 is the simple schematic diagram of the laser；
Fig. 2 is the simple schematic diagram of the laser and collimating mirror cooperation；
Fig. 3 is the simple schematic diagram of optical line to form reference light hot spot；
Fig. 4 is the simple schematic diagram of coupling optical path of the present invention；
Fig. 5 is the simple schematic diagram that reference light hot spot is overlapped process with coupling light hot spot adjustment in industrial camera.
Specific embodiment
As shown in Figures 1 to 5, more detailed explanation is made to the present invention below in conjunction with attached drawing.
As shown in figure 1 it is to be coupled enter optical fiber laser 1, the dispersion angle of the laser is 2 θ, dotted line table in figure
Show optical axis.
As shown in Fig. 2, the light-emitting surface of laser 1 is placed in the object focus of collimating mirror 2, the focal length of collimating mirror 2 is set as
f1, wave aberration RMS value should be less than 1/10 λ, and wherein λ is lambda1-wavelength, use non-globe lens, light pass surface in the present embodiment
The anti-reflection film being adapted to operation wavelength need to be plated, effective clear aperture D needs to meet:.After collimating mirror collimates laser become with
The parallel directional light of optical axis, spot diameter size d are.In the present embodiment, the collimating mirror chooses the aspheric that focal length is 10mm
Lens.If the centre of luminescence of laser 1 is not in the focus of collimating mirror, but in the certain point of the focal plane perpendicular to optical axis,
If the point is A at a distance from focus, then the light and optical axis that laser 1 issues generate the directional light of certain angle, which is.
As shown in figure 3, the laser beam after collimation is divided for transmission by Amici prism 3 and reflects two-way light,
In order to reduce the influence to coupling efficiency to the greatest extent, the reflection ratio of Amici prism should be as small as possible, chooses in the present embodiment anti-
Penetrate the Amici prism that transmittance is R:T=10:90.In order to facilitate debugging, the present embodiment chooses the beam splitter of 25.4mm.It is being divided
The prism of corner cube being arranged in the reflected light exit direction of prism, its role is to perpendicular to the angle incidence of normal a certain range
Light, return path are identical as incident ray.To guarantee the true of the reference light hot spot formed after industrial camera receives light
Reality and consistency.
In order to reduce veiling glare, the plane of incidence of Amici prism and prism of corner cube need to plate be adapted with laser wavelength it is anti-reflection
Film.The finish of Amici prism and prism of corner cube should be not less than American army mark 40/20 or III grade of Chinese national standard.To guarantee coupling essence
The trueness error of degree, pyramid and Amici prism should be less than 5 ".
Backtracking after reflecting by the reflected light of Amici prism by prism of corner cube 4 is indicated in Fig. 3, by 5 institute of camera
It receives.By this, light is defined as reference light all the way, and the corresponding hot spot formed in industrial camera lens is known as reference light hot spot.
In this example, it is assumed that the light-emitting area size of laser is S1, the size in camera image planes is S2, S1/S2
=f1/f2, wherein f2For the focal length of camera lens.The plane of incidence of Amici prism should be vertical with laser beam axis, it is assumed that its error angle is
γ.In conjunction with collimating mirror and Amici prism installation error that may be present, the angle of half field-of view of industrial camera 5 need to meet β >=γ+.And
The size B of camera detector target surface depends on the focal length f of field range and camera lens2: B >=2*f2*tanβ.In the present embodiment, camera
Target surface size is 16mm.And the size of pixel a depends on the focal length f of camera lens according to required precision2With the focal length f of collimation lens1,
Its pixel equivalent is answered are as follows:.It can be seen that from formula, pixel is smaller, and the focal length of camera lens is longer, and precision is higher, the present embodiment
The industrial lens focal length of middle selection is 75mm, and camera pixel size is 3.1 μm.
As shown in figure 4, the part laser beam of the prism transmission that is split after collimation, converges by microcobjective 6
Poly-, the end face that is coupled into of optical fiber 7 is set in the focus of microcobjective 6, since fiber end face is plane, is had about 4% light and is passed through
Fiber end face reflects and along backtracking, into after Amici prism, by the reflection of reflecting surface, is received by industrial camera 5, will
Light is defined as coupling light all the way for this, and the hot spot formed on camera lens is known as coupling light hot spot.Furthermore the operating wave of microcobjective
Section needs to be adapted with the spectral coverage of laser.The numerical aperture NA of the light converged through microcobjective 6LaserOptical fiber cannot be greater than
Numerical aperture NAOptical fiber.The numerical aperture of single mode optical fiber is smaller, wherein NALaser=d/(2*fObject lens).Light used in the present embodiment
Fine NA is 0.15.In the present embodiment, the bore d of hot spot is 1mm, and the focal length of object lens is 4mm, then NALaser=1/(2*4)=
0.125.In order to guarantee high transmittance and beam quality, the object lens to match with optical maser wavelength should be selected, are used in the present embodiment
Infrared objective.The optical maser wavelength used in the present embodiment is 850nm, infrared objective that can be suitable according to the wavelength selection of coupling light
Or visible light object lens.For convenience of debugging, infinity object lens can be selected, use operating distance 20.3mm, focal length in the present embodiment
For 4mm, the object lens of enlargement ratio 50X.
In order to facilitate fixed and clamping, FC/PC Interface Fiber is used in this example, naked fibre also can be selected.
As shown in figure 4, the light that the laser 1 issues is after the collimating mirror 2 collimation, after the Amici prism 3
It is divided into transmitted ray and reflection light.After reflection light therein is incident on the prism of corner cube 4, by the work after former road reflection
Industry camera 5 absorbs and forms reference light hot spot.The transmitted ray that the Amici prism 3 separates enters the microcobjective 6, passes through
It is incident on after convergence in the optical fiber 7, the coupled end of the optical fiber 7 is reflected in face of a part of incident light, the portion
After dividing reflection light to return to the Amici prism 3 along original route, after the reflective surface of the Amici prism 3, by institute
It states and forms coupling light hot spot after industrial camera 5 absorbs.As shown in figure 5, at this moment will appear two hot spots on camera, one be through
The reference light hot spot that prism of corner cube reflects to form, another is the coupling light hot spot by fiber reflection.In order to distinguish two
Hot spot can determine the corresponding optical path of hot spot by increasing shelter in the optical path.When the coupling light hot spot and the ginseng
When examining light hot spot and being completely coincident, determine in fiber coupling to the optical fiber 7 that the laser 1 is emitted；Otherwise, to the optical fiber
7 pose is adjusted, it can be seen that coupling light hot spot moves in the camera, when coupling light hot spot is adjusted to and reference light
When the position of hot spot is overlapped, then the laser for showing that laser is issued has entered inside of optical fibre.
Regulating device of the present invention is convenient and easy, and all conventional components of selected components are not required to
Additional customized is wanted, cost is greatly saved.Adjustment method is easy, and the weight and volume of element is all smaller, both can be made hand
It is dynamic to adjust board, and space has been reserved for the automation of integral device.
Operation of the present invention is easy, and structure is simple, small in size, is suitable for the laser light source of a variety of dispersion angles, utilizes maturation
The equipment of scale of mass production has built the autocollimator equipment for auxiliary para equipment, can be convenient after completion fiber coupling
Remove equipment, the loss of energy will not be caused because of the presence for aligning equipment.
Claims (10)
1. a kind of device of big angle of divergence laser coupled single mode optical fiber, including it is to be coupled enter optical fiber (7) and with the big angle of divergence
Laser (1), it is characterised in that: it further includes the collimating mirror (2) being successively set on the optical axis of the laser (1), light splitting
The coupling end face of prism (3) and microcobjective (6), the optical fiber (7) is set in the focus of the microcobjective (6), described
The light-emitting surface of laser (1) is set at the object focus of the collimating mirror (2), and the Amici prism (3) is arranged in the standard
On the emitting light path of straight mirror (2), the microcobjective (6) is arranged in the light transmission optical path of the Amici prism (3), at described point
Prism of corner cube (4) are provided on the emitting light path of the reflected light of light prism (3), the other side and position in the Amici prism (3)
In being additionally provided with industrial camera (5) on the reflected light path of the prism of corner cube (4).
2. the device of big angle of divergence laser coupled single mode optical fiber according to claim 1, it is characterised in that: the collimating mirror
It (2) is non-globe lens, and it is compatible anti-reflection that the wavelength of laser being emitted with the laser (1) is provided in light pass surface
Film, the vertical missing between the collimating mirror (2) and the optical axis of the laser (1) is less than 5 ".
3. the device of big angle of divergence laser coupled single mode optical fiber according to claim 2, it is characterised in that: the light splitting rib
Mirror (3) is beam splitter, and the reflection and transmission ratio R:T range of the Amici prism (3) is 10:90~50:50.
4. the device of big angle of divergence laser coupled single mode optical fiber according to claim 1, it is characterised in that: the pyramid rib
The plane of incidence of mirror (4) is provided with anti-reflection film compatible with the wavelength of laser of the laser (1) outgoing, the prism of corner cube
(4) vertical missing between the optical axis of the laser (1) is less than 5 ".
5. the device of big angle of divergence laser coupled single mode optical fiber according to claim 1, it is characterised in that: through described micro-
The numerical aperture of the light of object lens (6) convergence is less than or equal to the numerical aperture of the optical fiber (7).
6. the device of big angle of divergence laser coupled single mode optical fiber according to claim 5, it is characterised in that: the micro- object
Mirror (6) is infrared objective, and the optical fiber (7) is FC/PC Interface Fiber either naked fibre.
7. the device of big angle of divergence laser coupled single mode optical fiber according to claim 3, it is characterised in that: the light splitting rib
The reflection and transmission ratio R:T of mirror (3) is 10:90.
8. a kind of device using angle of divergence laser coupled single mode optical fiber as described in claim 1 big is by laser coupled to optical fiber
Method, which is characterized in that method includes the following steps:
A. the light that the laser (1) issues is divided into after the Amici prism (3) after the collimating mirror (2) collimation
Penetrate light and reflection light；
B. it after reflection light therein is incident on the prism of corner cube (4), is absorbed simultaneously after former road reflection by the industrial camera (5)
Form reference light hot spot；
C. the transmitted ray that the Amici prism (3) separates enters the microcobjective (6), is incident on the light after convergence
In fine (7), the coupled end of the optical fiber (7) is reflected in face of a part of incident light, the part reflection light along
After original route returns to the Amici prism (3), after the reflective surface of the Amici prism (3), by the industrial camera
(5) coupling light hot spot is formed after absorbing；
D. when the coupling light hot spot and the reference light hot spot fit like a glove, the fiber coupling of laser (1) outgoing
In to the optical fiber (7), otherwise, E is entered step；
E. the pose of the optical fiber (7) is adjusted, until the coupling light hot spot fits like a glove with the reference light hot spot,
At this point, in the fiber coupling to the optical fiber (7) of laser (1) outgoing.
9. the method for big angle of divergence laser coupled single mode optical fiber according to claim 8, which is characterized in that in the laser
Device (1) and the Amici prism (3) are there are in the case where installation deviation, the half field-of-view's angle beta and detector of the industrial camera (5)
The size of target surface B determines according to the following steps:
F. when the centre of luminescence of laser deviates the focus of the collimating mirror (2) and positioned at the focal plane of the collimating mirror (2)
When at certain point, if the distance of the distance focal point is A, the directional light and the laser (1) that the laser (1) issues
Optical axis there are an angle, which is, wherein f1For the focal length of collimating mirror；
G. the optical axis for setting the Amici prism (3) and the laser (1) reaches the error angle of the state of being mutually perpendicular to as γ, then
Half field-of-view's angle beta of the industrial camera (5) need to meet β >=γ+, if the lens focus of the industrial camera (5) be f2, then described
The size B of the detector target surface of industrial camera (5) need to meet B >=2*f2*tanβ。
10. the method for big angle of divergence laser coupled single mode optical fiber according to claim 9, it is characterised in that: set described sharp
The angle of divergence of light device (1) is 2 θ, then it is straight that the illumination that the laser (1) issues is mapped to the hot spot generated on the collimating mirror (2)
Diameter d needs to meet, wherein f1For the focal length of collimating mirror.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910812082.2A CN110471147A (en) | 2019-08-30 | 2019-08-30 | The device and method of big angle of divergence laser coupled single mode optical fiber |
| CN202010742586.4A CN111708133A (en) | 2019-08-30 | 2020-07-29 | Device and method for coupling single-mode optical fiber by laser with large divergence angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910812082.2A CN110471147A (en) | 2019-08-30 | 2019-08-30 | The device and method of big angle of divergence laser coupled single mode optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110471147A true CN110471147A (en) | 2019-11-19 |
Family
ID=68514240
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910812082.2A Withdrawn CN110471147A (en) | 2019-08-30 | 2019-08-30 | The device and method of big angle of divergence laser coupled single mode optical fiber |
| CN202010742586.4A Pending CN111708133A (en) | 2019-08-30 | 2020-07-29 | Device and method for coupling single-mode optical fiber by laser with large divergence angle |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010742586.4A Pending CN111708133A (en) | 2019-08-30 | 2020-07-29 | Device and method for coupling single-mode optical fiber by laser with large divergence angle |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN110471147A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110895364A (en) * | 2019-12-19 | 2020-03-20 | 苏州迅镭激光科技有限公司 | High-coupling-efficiency fiber laser debugging device and method |
| CN111708133A (en) * | 2019-08-30 | 2020-09-25 | 珠海长园达明智能科技有限公司 | Device and method for coupling single-mode optical fiber by laser with large divergence angle |
| CN113333943A (en) * | 2021-05-25 | 2021-09-03 | 南京理工大学 | Method for replacing industrial-grade operation optical fiber |
| CN113532637A (en) * | 2020-04-20 | 2021-10-22 | 山东华光光电子股份有限公司 | Adapter capable of monitoring numerical aperture and power of light spot and manufacturing and using method thereof |
| WO2021232661A1 (en) * | 2020-05-22 | 2021-11-25 | 青岛海信宽带多媒体技术有限公司 | Optical module |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113116516A (en) * | 2021-04-01 | 2021-07-16 | 广州迪光医学科技有限公司 | Laser coupling device |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2535857A1 (en) * | 1982-11-10 | 1984-05-11 | Spectec | Device and method enabling the relative positions of an optical fibre and of a beam emanating from a laser or from another optical fibre to be determined. |
| US4984885A (en) * | 1989-12-15 | 1991-01-15 | General Electric Company | Method and apparatus for high power optical fiber injection and alignment |
| GB0415292D0 (en) * | 2004-07-08 | 2004-08-11 | Qinetiq Ltd | Optical fibre alignment apparatus and method |
| US7298466B2 (en) * | 2005-03-15 | 2007-11-20 | Avanex Corporation | System and method for assembling optical components |
| CN102313508B (en) * | 2010-07-06 | 2013-08-14 | 上海微电子装备有限公司 | Light path alignment device of laser interferometer and method |
| CN106383396A (en) * | 2016-10-31 | 2017-02-08 | 中国科学院西安光学精密机械研究所 | Micron-scale photoelectric centering method and device based on surface reflection image |
| CN108663758B (en) * | 2018-04-10 | 2019-07-23 | 中国科学院上海技术物理研究所 | A kind of free space laser coupled to single mode optical fiber device and method |
| CN108957716B (en) * | 2018-05-17 | 2020-11-03 | 哈尔滨工业大学 | Spatial light modulator center position interference alignment device and method |
| CN110471147A (en) * | 2019-08-30 | 2019-11-19 | 珠海达明科技有限公司 | The device and method of big angle of divergence laser coupled single mode optical fiber |
| CN213122366U (en) * | 2019-08-30 | 2021-05-04 | 珠海达明科技有限公司 | Large divergence angle laser coupling single mode fiber device |
-
2019
- 2019-08-30 CN CN201910812082.2A patent/CN110471147A/en not_active Withdrawn
-
2020
- 2020-07-29 CN CN202010742586.4A patent/CN111708133A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111708133A (en) * | 2019-08-30 | 2020-09-25 | 珠海长园达明智能科技有限公司 | Device and method for coupling single-mode optical fiber by laser with large divergence angle |
| CN110895364A (en) * | 2019-12-19 | 2020-03-20 | 苏州迅镭激光科技有限公司 | High-coupling-efficiency fiber laser debugging device and method |
| CN110895364B (en) * | 2019-12-19 | 2023-09-15 | 苏州迅镭激光科技有限公司 | High-coupling-efficiency fiber laser debugging device and method |
| CN113532637A (en) * | 2020-04-20 | 2021-10-22 | 山东华光光电子股份有限公司 | Adapter capable of monitoring numerical aperture and power of light spot and manufacturing and using method thereof |
| WO2021232661A1 (en) * | 2020-05-22 | 2021-11-25 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| US11990725B2 (en) | 2020-05-22 | 2024-05-21 | Hisense Broadband Multimedia Technologies Co., Ltd. | Optical module |
| CN113333943A (en) * | 2021-05-25 | 2021-09-03 | 南京理工大学 | Method for replacing industrial-grade operation optical fiber |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111708133A (en) | 2020-09-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110471147A (en) | The device and method of big angle of divergence laser coupled single mode optical fiber | |
| CN110632713B (en) | Device and method for rapidly coupling large-divergence-angle laser to single-mode fiber | |
| WO2021197403A1 (en) | Lidar for long-distance detection and detection method therefor | |
| CN107917732B (en) | A kind of optical fiber geometric parameter, attenuation coefficient integrated test system | |
| CN102661938A (en) | Method and device of stimulated emission depletion (STED) microscopy based on tangential polarized light | |
| CN103490267A (en) | Laser module | |
| CN111174717B (en) | Optical fiber geometric parameter testing system and method | |
| JPH04505059A (en) | A method of coupling light through a coupler on an optical fiber light guide using phase space matching | |
| CN104536139A (en) | Prism coupling type wedge-shaped plane waveguide optical device | |
| CN115079346B (en) | Installation and adjustment device and method for coupling space light to optical fiber | |
| CN102004313A (en) | Common aperture laser active illuminated imaging system | |
| US5301249A (en) | Catoptric coupling to an optical fiber | |
| CN106907998A (en) | The Spectral Confocal measurement apparatus and method of linear optimization | |
| CN108387974A (en) | High-power optical fiber laser receiving and transmitting integrated end cap | |
| CN213122366U (en) | Large divergence angle laser coupling single mode fiber device | |
| He et al. | Analysis of contributing factors in coupling from laser diode into optical fiber | |
| CN212321830U (en) | Laser radar for remote detection | |
| CN108445640A (en) | A kind of coaxial uniform illumination system of relative pose vision measurement sensor | |
| CN208765668U (en) | A kind of fiber position detection system | |
| CN105954841A (en) | Single-fiber laser light source coupling system | |
| US5013120A (en) | Monochromator to fiber-cable coupling system | |
| CN208076758U (en) | High-power optical fiber laser receiving and transmitting integrated end cap | |
| CN206440382U (en) | A kind of long light path optical system | |
| CN109061890A (en) | A kind of beam splitting system | |
| CN210431435U (en) | Multi-wavelength common optical fiber laser transmitting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20191119 |