CN109256667A - Pump module and solid state laser with it - Google Patents
Pump module and solid state laser with it Download PDFInfo
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- CN109256667A CN109256667A CN201811354333.9A CN201811354333A CN109256667A CN 109256667 A CN109256667 A CN 109256667A CN 201811354333 A CN201811354333 A CN 201811354333A CN 109256667 A CN109256667 A CN 109256667A
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- 239000007787 solid Substances 0.000 title claims abstract description 26
- 238000005086 pumping Methods 0.000 claims abstract description 126
- 230000010287 polarization Effects 0.000 claims abstract description 67
- 230000008878 coupling Effects 0.000 claims abstract description 59
- 238000010168 coupling process Methods 0.000 claims abstract description 59
- 238000005859 coupling reaction Methods 0.000 claims abstract description 59
- 230000006835 compression Effects 0.000 claims abstract description 5
- 238000007906 compression Methods 0.000 claims abstract description 5
- 239000013078 crystal Substances 0.000 claims description 54
- 238000010521 absorption reaction Methods 0.000 claims description 15
- 229920006395 saturated elastomer Polymers 0.000 claims description 15
- 239000002131 composite material Substances 0.000 claims description 9
- 230000011514 reflex Effects 0.000 claims description 2
- 230000005284 excitation Effects 0.000 claims 1
- 230000009471 action Effects 0.000 abstract description 18
- 239000000835 fiber Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- 230000004907 flux Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000008710 crystal-8 Substances 0.000 description 5
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- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
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- 238000009738 saturating Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/16—Solid materials
- H01S3/163—Solid materials characterised by a crystal matrix
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Abstract
The present invention provides a kind of pump module and with its solid state laser.The pump module includes: pumping source, and pumping source is two and is arranged side by side, for providing first laser and second laser；Fast axis collimation element is set to the light emission side of pumping source, for carrying out fast axis collimation to first laser and second laser；Polarization coupling element is set to the light emission side of fast axis collimation element, for being mutually perpendicular to the polarization direction of the first laser after fast axis collimation and second laser and close beam to obtain third laser；Slow axis collimating element is set to the light emission side of polarization coupling element, for carrying out slow axis compression and convergence to third laser to obtain driving source.On the one hand the slow-axis direction beam quality of pump beam can be improved in above-mentioned pump module; another aspect double pumping action source forms mutually backup and high-performance surplus; the exception of pumping source caused by single pumping source luminous point random failure or failure are avoided, so as to meet high reliability requirement.
Description
Technical field
The present invention relates to pumping and solid state laser technical fields, in particular to a kind of pump module and have it
Solid state laser.
Background technique
Existing polarization coupling technology is commonly applied in fiber coupled laser diode module, needs to convert using light beam
Module (BTS) is rotated by 90 ° light beam slow-axis direction, reduces the light beam parameters product (BPP) of slow-axis direction, then to slow axis side
To being collimated, polarization coupling is just carried out later.
Above scheme due to first use slow axis collimation lens (SAC) light beam slow-axis direction is collimated, then using polarization
Light combination mirror group (PBC) carries out polarization coupling, so as to realize the light loss of less slow-axis direction and close beam transfer efficiency；So
And this technical solution is needed using BTS system, and can only use the less laser bar item of points that shines (such as 19 shine
1cm bars of item of point), and (be generally made of FAC/BTS/SAC/PBC, wherein FAC is fast axis collimation since optical element is more
Lens), to need biggish space, therefore general mostly applied in fiber coupling module；Be difficult to volume requirement more
Strictly, it needs to use in the small-sized passively Q-switch solid-state laser module of high reliability.
Existing passively Q-switch solid-state laser scheme generally uses fiber coupling module as pumping source, or using single
A laser bar item, which goes out light and couples directly to crystal, to be pumped.
Passively Q-switch solid-state laser using fiber coupling module as pumping source, due to fiber coupling module and crystal
Module (including optics, crystal, hysteroscope etc.) separates, therefore generally requires the two block combiners and be just able to achieve work together,
Overall structure is excessively complicated and huge, needs integrated application, the application stringent to volume requirement (such as vehicle-mounted to swash some
Optical radar) it is difficult to be applicable in.
And light is gone out using single laser bar item and couples directly to the passive solid state laser that laser crystal carries out end pumping,
Since the light beam of laser bar item is longer in slow-axis direction, cause out light have biggish asymmetry；Further, since single laser
Certain luminous point failures of bar item, can cause the uneven of pump beam, so as to cause the uneven of Solid State Laser output.
Summary of the invention
The main purpose of the present invention is to provide a kind of pump module and with its solid state laser, to solve existing skill
The problem of laser in art is bulky and structure is complicated.
To achieve the goals above, according to an aspect of the invention, there is provided pump module, comprising: pumping source, pumping
Source is two and is arranged side by side, for providing first laser and second laser；Fast axis collimation element, be set to pumping source goes out light
Side, for carrying out fast axis collimation to first laser and second laser；Polarization coupling element, be set to fast axis collimation element goes out light
Side, for being mutually perpendicular to the polarization direction of the first laser after fast axis collimation and second laser and close beam to obtain third
Laser；Slow axis collimating element is set to the light emission side of polarization coupling element, for carrying out slow axis compression and convergence to third laser
To obtain driving source.
Further, polarization coupling element includes: half-wave plate, is set to the light emission side of fast axis collimation element, for fast
The polarization direction of first laser after axis collimation carries out 90 ° of rotations；Polarization coupling microscope group is set to the light emission side of half-wave plate, uses
Third laser is obtained in the second laser after postrotational first laser and fast axis collimation is carried out conjunction beam.
Further, two pumping sources are respectively to provide the first pumping source of first laser and provide the of second laser
Two pumping sources, polarization coupling microscope group include: the first lens section, positioned at the light emission side of the first pumping source and opposite with the first pumping source
Setting；Second lens section, positioned at the second pumping source light emission side and be oppositely arranged with the second pumping source, the first lens section be used for will
First laser all reflexes at the position of the second lens section, and the second lens section is for all reflecting first laser and all transmiting
Second laser.
Further, the orientation of the first pumping source and the second pumping source is first direction, in a first direction, first
Vertical range between two opposite end faces of pumping source is L1, vertical range between two opposite ends of the first lens section
For H1, the vertical range between two opposite end faces of the second pumping source is L2, between two opposite ends of the second lens section
Vertical range is H2, L1< H1, L2< H2；L1Midpoint be A1, H1Midpoint be B1, L2Midpoint be A2, H2Midpoint be B2, A1
With B1Line perpendicular to first direction.
Further, pumping source is arranged in series.
Further, pumping source is laser bar item.
Further, fast axis collimation element is two and is arranged correspondingly with the light emission side of pumping source.
Further, fast axis collimation element and slow axis collimating element are independently selected from cylindrical mirror, spherical mirror and aspherical mirror
Any one of.
According to another aspect of the present invention, a kind of solid state laser is provided, comprising: above-mentioned pump module pumps mould
Block is used to generate the driving source for realizing end pumping；Crystal module is set to the light emission side of slow axis collimating element in pump module,
For receiving driving source and generating laser.
Further, crystal module includes gain media crystal, saturated absorption crystal resonant cavity, and resonant cavity is set to slowly
The light emission side of axis collimating element, gain media crystal and saturated absorption crystal are set in resonant cavity；Alternatively, crystal module includes
Gain media crystal and saturated absorption crystal, gain media crystal and saturated absorption Crystallization composite crystal, composite crystal are set
It is placed in the light emission side of slow axis collimating element, and on the light direction of slow axis collimating element, two opposite end faces of composite crystal
Form resonant cavity.
It applies the technical scheme of the present invention, provides a kind of pump module, carried out after taking two pumping sources to be arranged side by side
Polarization coupling obtains the pump light source of single-spot；Under conditions of double pumping action source, polarization coupling element be can be realized to double pumping action
On the one hand the slow-axis direction beam quality of pump beam, another aspect double pumping action source shape can be improved in the overlapping of source output beam
At mutual backup and high-performance surplus, the exception of pumping source caused by single pumping source luminous point random failure or failure are avoided,
So as to meet high reliability requirement.Further, the present invention can be by improving PBC structure size and using pump
The design of the specific configuration of Pu source and PBC compensates for the luminous flux loss of the polarization coupling due to caused by slow axis divergence, so as to
Enough save light beam conversion module (BTS) in the prior art；Due to not using BTS, can be used with more luminous point
Pumping source realize high-peak power application demand.
Detailed description of the invention
The Figure of description for constituting a part of the invention is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 shows a kind of connection relationship diagram of solid state laser provided by the application embodiment；
Fig. 2 shows between pumping source single in a kind of solid state laser provided by the prior art and polarization coupling microscope group
Positional relationship and light path schematic diagram；And
Fig. 3 show in the solid state laser provided by the application embodiment single pumping source and polarization coupling microscope group it
Between positional relationship and light path schematic diagram.
Wherein, the above drawings include the following reference numerals:
1 ', pumping source；4 ', polarization coupling microscope group；1, pumping source；11, the first pumping source；12, the second pumping source；2, fast axle
Collimating element；3, half-wave plate；4, polarization coupling microscope group；41, the first lens section；42, the second lens section；5, slow axis collimating element；
6, high reflective mirror piece；7, gain media crystal；8, saturated absorption crystal；9, partially reflecting mirror piece.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein.In addition, term " includes " and " tool
Have " and their any deformation, it is intended that cover it is non-exclusive include, for example, containing a series of steps or units
Process, method, system, product or equipment those of are not necessarily limited to be clearly listed step or unit, but may include without clear
Other step or units listing to Chu or intrinsic for these process, methods, product or equipment.
As described in background technique, laser in the prior art is bulky and structure is complicated.Of the invention
Inventor studies regarding to the issue above, proposes a kind of solid state laser, as shown in Figure 1, comprising: pumping source 1, pumping source
1 is for two and arranged side by side, for providing first laser and second laser；Fast axis collimation element 2 is set to going out for pumping source 1
Light side, for carrying out fast axis collimation to first laser and second laser；Polarization coupling element is set to fast axis collimation element 2
Light emission side, for being mutually perpendicular to the polarization direction of the first laser after fast axis collimation and second laser and close beam to obtain
Third laser；Slow axis collimating element 5 is set to the light emission side of polarization coupling element, for carrying out slow axis compression to third laser
With convergence to obtain driving source.
The pump of single-spot is obtained due to carrying out polarization coupling after taking two pumping sources to be arranged side by side in above-mentioned pump module
Pu light source；Under conditions of double pumping action source, polarization coupling element can be realized the overlapping to double pumping action source output beam, on the one hand
The slow-axis direction beam quality of pump beam can be improved, another aspect double pumping action source forms mutually backup and high-performance surplus,
The exception of pumping source caused by single pumping source luminous point random failure or failure are avoided, is used so as to meet high reliability
It is required that.Further, the present invention can be by improving polarization coupling microscope group (PBC) structure size in polarization coupling element and adopting
It is designed with the specific configuration of pumping source and PBC, compensates for the luminous flux loss of the polarization coupling due to caused by slow axis divergence, from
And light beam conversion module (BTS) in the prior art can be saved；Due to not using BTS, can be used with more multiple
The pumping source of luminous point realizes high-peak power application demand.
In a preferred embodiment, as shown in Figure 1, above-mentioned polarization coupling element of the invention includes half-wave plate 3
With polarization coupling microscope group 4, half-wave plate 3 is set to the light emission side of fast axis collimation element 2, for the first laser after fast axis collimation
Polarization direction carry out 90 ° rotation；Polarization coupling microscope group 4 is set to the light emission side of half-wave plate 3, for swashing postrotational first
Second laser after light and fast axis collimation carries out conjunction beam and obtains third laser.
The second of above-mentioned two pumping source respectively the first pumping source 11 of offer first laser and offer second laser
Pumping source 12, it is preferable that above-mentioned polarization coupling microscope group 4 includes the first lens section 41 and the second lens section 42, the first lens section 41
Positioned at the first pumping source 11 light emission side and be oppositely arranged with the first pumping source 11, for first laser all to be reflexed to second
At the position of lens section 42；Second lens section 42 is located at the light emission side of the second pumping source 12 and sets relatively with the second pumping source 12
It sets, for all reflecting first laser and all transmiting second laser, as shown in Figure 3.
The first lens section 41 and the second lens section 42 that above-mentioned polarization coupling microscope group 4 includes are key technology function of the invention
Energy part, the structural and optical properties of the other parts of polarization coupling microscope group 4 can refer to existing structure and carry out adaptability design,
In the case where guaranteeing that technical solution of the present invention and technical purpose can be realized, meet corresponding reflection or transmission or other related items
Part.
In above-mentioned preferred embodiment, with the orientation of above-mentioned first pumping source 11 and above-mentioned second pumping source 12
For first direction, the design of the specific configuration of two pumping sources and PBC can be with are as follows: as shown in figure 3, on above-mentioned first direction, the
Vertical range between two opposite end faces of one pumping source 11 is L1, hanging down between two opposite ends of the first lens section 41
Straight distance is H1, the vertical range between two opposite end faces of the second pumping source 12 is L2, opposite two of the second lens section 42
Vertical range between end is H2, L1< H1, L2< H2；L1Midpoint be A1, H1Midpoint be B1, L2Midpoint be A2, H2's
Midpoint is B2, A1With B1Line perpendicular to first direction.At this point, the both ends PBC there are surplus be respectively (H1-L1)/2, it is above
The symmetrical arrangement and surplus design of two pumping sources and PBC, although so that the light beam light path difference of two pumping sources, hair
Scattered angle will not change, and the optical path being emitted from PBC can overlap, so that the hot spot of output does not misplace.
In the embodiment of the present invention, and indefinite stringent limitation L1With L2Relationship, for convenience design and production, make this hair
Bright technical purpose and technical effect more preferably, can make L1=L2, H1=H2；Certainly, it is required in certain pairs of technical effects not stringent
Application scenes in, L1≠L2, H1≠H2Also it is allowed.
It is complete generally for realization light beam due to generalling use single pumping source (such as a fullbar) in the prior art
Portion enters device, needs the size of 4 ' of polarization coupling microscope group and the size of 1 ' of the pumping source completely corresponding, and shown in Fig. 2 single
Pumping source, so that the light beam after outgoing misplaces, is specifically shown in the arrow of emergent light shown in Fig. 2 since size does not correspond to.And
The present invention using double pumping action source, as shown in figure 3, by the structure size of design polarization coupling microscope group 4 make its two
End compared to pumping source 1 there are surplus, specifically: polarization coupling microscope group part corresponding with double pumping action source one respectively, up and down
It is respectively kept with surplus, and the center of double pump source part corresponding with polarization coupling microscope group respectively is aligned setting, and light beam slow axis
The full-shape of the angle of divergence is generally 10 ° or so, and there are the designs of surplus so as in the feelings for not using light beam conversion module (BTS)
The hot spot dislocation-free that under condition, all light beams can still enter and carries out conjunction beam in PBC, and PBC can be made to export.
In above-mentioned pump module of the invention, pumping source 1 is that can use laser bar item.Preferably, two pumping sources 1
Between be arranged in series.The cathode of i.e. one pumping source 1 connects the anode of another pumping source 1, and is not connected on two pumping sources 1
Positive electrode and negative electrode connect to power supply respectively.Two concatenated pumping sources 1 only need lesser driving current can realize compared with
Big light power, greatly reduces the requirement to power supply, and can also heat load in reduction system.
Also, it is right using BTS (light beam conversion module) due to needing in traditional fiber coupled laser diode module
Light beam slow-axis direction is rotated by 90 °, and is reduced the light beam parameters product (BPP) of slow-axis direction, is then collimated to slow-axis direction,
Just carry out polarization coupling later, and this technical solution is needed using BTS system, and due to each luminous point of bar item need with
Each unit in BTS corresponds, therefore bar item/single tube chip with less luminous point can only be used (such as common
There are 19 luminous points).And above-mentioned pump module of the invention is used, since BTS can not be used, to overcome conventional polarization
Close beam scheme can only use less luminous point bar the shortcomings that, the luminous point of pumping source 1 can be made not limited by structure itself,
Make polarization coupling technology can be applied to it is some need high-peak power, quasi-continuous (QCW) work with more luminous point
In bar laser.
In above-mentioned pump module of the invention, fast axis collimation element 2 can be for positioned at the light emission side of two pumping sources 1
One, can also it be arranged correspondingly for two and with the light emission side of pumping source 1, as shown in Figure 1.Above-mentioned fast axis collimation element
2 with slow axis collimating element 5 independently selected from any one of cylindrical mirror, spherical mirror and aspherical mirror.
Above-mentioned pump module of the invention specifically can be used for generating the driving source for realizing end pumping.
According to another aspect of the present invention, a kind of solid state laser is additionally provided, as shown in Figure 1, including above-mentioned pumping
Module and crystal module, pump module are used to generate the driving source for realizing end pumping, and crystal module is set to pump module
The light emission side of middle slow axis collimating element 5, for receiving driving source and generating laser.In above-mentioned solid state laser, pass through PBC pairs
The light beam of two pumping sources is carried out closing beam and then be converged using a slow axis collimating element 5 to slow-axis direction, and light beam is made
Convergence enters crystal module, realizes efficient pumping.
Above-mentioned solid state laser of the invention can be passive Q-adjusted end-face pump solid laser.Due to existing passive
It adjusts Q end-face pump solid laser scheme generally to use fiber coupling module as pumping source, or light is gone out using single bar of item
It couples directly to crystal to be pumped, to easily lead to the bulky and non-uniform problem of light out.And it is of the invention above-mentioned
Improved polarization coupling technology is used in pump module, less luminous point can only be used by solving conventional polarization conjunction beam scheme
Bar item needs to lead to the complicated huge disadvantage of optical system using BTS, so that improved polarization coupling scheme volume compact,
Luminous flux loss is small, can be applied in the small-sized passively Q-switch solid-state laser stringent to volume and efficiency requirements.
Also, in above-mentioned dynamic Q-switch solid laser of the invention, it can be collimated using PBC to without slow-axis direction
Light beam directly close beam, by improving the structure size of PBC and being designed using the specific configuration of double pumping action source and PBC, make up
The luminous flux loss of due to caused by slow axis divergence polarization coupling；Due to not using BTS, can be used with more
The chip of luminous point realizes high-peak power application demand.
Meanwhile it taking two bars of items to be arranged side by side in this programme and carrying out polarization coupling realization (also to be further arranged in series)
The pump light source of single-spot；Under conditions of double pump source, PBC may be implemented on the one hand may be used to the overlapping of double pumping action source beam
To improve the slow-axis direction beam quality of pump beam, another aspect double pumping action source forms mutually backup and high-performance surplus, keeps away
Exempt from pumping exception or failure caused by single bar luminous point random failure, it is direct-coupled passive using single bar of item to solve
The problem of Q-switch solid laser light beam symmetry difference and poor reliability, meet high reliability requirement.
The driving source for end pumping that pump module generates, which can be incident in the left and right sides end face of crystal module, to be leaned on
One end of nearly driving source, specific to realize the solid state laser of end pumping:
In a preferred embodiment, above-mentioned crystal module includes gain media crystal 7,8 and of saturated absorption crystal
Resonant cavity, resonant cavity are set to the light emission side of slow axis collimating element 5, and gain media crystal 7 and saturated absorption crystal 8 are set to humorous
In vibration chamber.Those skilled in the art can be according to the prior art to the type of above-mentioned gain media crystal 7, saturated absorption crystal 8
Rational choice is carried out, details are not described herein.
In another preferred embodiment, above-mentioned crystal module includes gain media crystal 7 and saturated absorption crystal
8, gain media crystal 7 and saturated absorption crystal 8 form composite crystal, and composite crystal is set to the light out of slow axis collimating element 5
Side, and on the light direction of slow axis collimating element 5, two opposite end faces of above-mentioned composite crystal form resonant cavity.At this point, sharp
Resonant cavity is formed with the structure of crystal itself, it is not necessary that resonator mirror is still further arranged, keeps the structure of laser more simple, tight
It gathers.
Resonant cavity of the invention can be two independent hysteroscope compositions (high reflective mirror piece 6 and partially reflecting mirror piece 9), in energy
In the case where enough realizing similar purpose, high reflective mirror piece 6 and partially reflecting mirror piece 9 can also be formed by two end faces of crystal, only
The two end faces are wanted to meet the condition of reflectivity.
Above-mentioned pump module of the invention is further illustrated below in conjunction with embodiment and with its solid state laser.
Embodiment 1
The present embodiment uses solid state laser as shown in Figure 1, and scheme specifically includes that
As two semiconductor laser bars in double pumping action source 1, fast axis collimation element 2 be two fast axis collimation lens,
Half-wave plate 3, polarization coupling microscope group 4, slow axis collimating element 5 be cylindrical mirror, gain media crystal 7, saturated absorption crystal 8 and by
The resonator mirror that high reflective mirror piece 6 and partially reflecting mirror piece 9 form.Wherein, two bars of items are placed side by side, saturating by fast axis collimation respectively
The fast axis collimation of mirror progress light beam；Half-wave plate is placed on one of them bar front end, realizes to the light beam polarization direction of this bar of item
90 ° of rotation；Light beam of the degree of polarization by 90 degree of rotations and the light beam of another bar of item pass through polarization coupling microscope group, synthesize same
One light beam；Light beam after synthesis be incident on after cylindrical mirror carries out the compression convergence of slow-axis direction gain media crystal end-face into
Row pumping effect.
Above-mentioned two bar of item is placed side by side, and two bars of items are to be connected in series in electrical connection.Two concatenated bar of item phases
Single bar of item more longer than one or two bar items in parallel, on the one hand need smaller driving current may be implemented biggish
Light power, on the other hand can heat load in reduction system.
Also, the overlapping to the two bars light beams as double pumping action source may be implemented in above-mentioned polarization coupling microscope group (PBC),
On the one hand the slow-axis direction beam quality of pump beam can be improved, another aspect double pumping action source forms mutually backup and high-performance
Surplus avoids pumping caused by single bar luminous point random failure abnormal or failure, can satisfy high reliability requirement.
It can be seen from the above description that the above embodiments of the present invention realized the following chievements:
1, single-spot is obtained due to carrying out polarization coupling after taking two pumping sources to be arranged side by side in above-mentioned pump module
Pump light source；Under conditions of double pumping action source, polarization coupling element can be realized the overlapping to double pumping action source output beam, a side
The slow-axis direction beam quality of pump beam can be improved in face, and another aspect double pumping action source is formed more than mutually backup and high-performance
Amount avoids the exception of pumping source caused by single pumping source luminous point random failure or failure, so as to meet high reliability
Requirement；
2, by improving polarization coupling microscope group (PBC) structure size in slow axis collimating element and using pumping source and PBC
Specific configuration design, compensate for the luminous flux loss of the polarization coupling due to caused by slow axis divergence, it is existing so as to save
There is the light beam conversion module (BTS) in technology；Due to not using BTS, the pumping source with more luminous point can be used
Realize high-peak power application demand；
3, since existing passively Q-switch solid-state laser scheme generally uses fiber coupling module as pumping source, or
Go out light using single bar of item and couple directly to crystal to be pumped, to easily lead to, bulky and light is non-uniform out is asked
Topic.And improved polarization coupling technology is used in above-mentioned pump module of the invention, it solves conventional polarization and closes beam scheme only
Bar item of less luminous point can be used, need to lead to the complicated huge disadvantage of optical system using BTS, so that improved polarization
Conjunction beam scheme volume compact, luminous flux loss are small, can be applied to the small-sized passive Q-adjusted end face pump stringent to volume and efficiency requirements
In pumping solid laser.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of pump module characterized by comprising
Pumping source (1), the pumping source (1) is two and is arranged side by side, for providing first laser and second laser；
Fast axis collimation element (2), is set to the light emission side of the pumping source (1), for the first laser and described second
Laser carries out fast axis collimation；
Polarization coupling element is set to the light emission side of the fast axis collimation element (2), for making described first after fast axis collimation
The polarization direction of laser and the second laser is mutually perpendicular to and close beam to obtain third laser；
Slow axis collimating element (5) is set to the light emission side of the polarization coupling element, for carrying out slow axis to the third laser
Compression and convergence are to obtain driving source.
2. pump module according to claim 1, which is characterized in that the polarization coupling element includes:
Half-wave plate (3) is set to the light emission side of the fast axis collimation element (2), for swashing to described first after fast axis collimation
The polarization direction of light carries out 90 ° of rotations；
Polarization coupling microscope group (4), is set to the light emission side of the half-wave plate (3), for will the postrotational first laser and
The second laser after fast axis collimation carries out conjunction beam and obtains the third laser.
3. pump module according to claim 2, which is characterized in that two pumping sources (1) are respectively described in offer
The first pumping source (11) of first laser and the second pumping source (12) of the offer second laser, the polarization coupling microscope group
(4) include:
First lens section (41) is located at the light emission side of first pumping source (11) and sets relatively with first pumping source (11)
It sets；
Second lens section (42) is located at the light emission side of second pumping source (12) and sets relatively with second pumping source (12)
It sets,
First lens section (41) is used to all reflex to the first laser at the position of second lens section (42),
Second lens section (42) is for all reflecting the first laser and all transmiting the second laser.
4. pump module according to claim 3, which is characterized in that first pumping source (11) and second pumping
The orientation in source (12) is first direction, in said first direction, two opposite end faces of first pumping source (11)
Between vertical range be L1, the vertical range between two opposite ends of first lens section (41) is H1, described second
Vertical range between two opposite end faces of pumping source (12) is L2, two opposite ends of second lens section (42) it
Between vertical range be H2, L1< H1, L2< H2；The L1Midpoint be A1, the H1Midpoint be B1, the L2Midpoint be
A2, the H2Midpoint be B2, the A1With the B1Line perpendicular to the first direction.
5. pump module according to claim 1, which is characterized in that the pumping source (1) is arranged in series.
6. pump module according to any one of claim 1 to 5, which is characterized in that the pumping source (1) is laser bar
Item.
7. pump module according to claim 1, which is characterized in that the fast axis collimation element (2) for two and with institute
The light emission side for stating pumping source (1) is arranged correspondingly.
8. pump module according to claim 1 or claim 7, which is characterized in that the fast axis collimation element (2) and the slow axis
Collimating element (5) is independently selected from any one of cylindrical mirror, spherical mirror and aspherical mirror.
9. a kind of solid state laser characterized by comprising
Pump module described in any item of the claim 1 to 8, the pump module are used to generate the excitation for realizing end pumping
Source；
Crystal module is set to the light emission side of slow axis collimating element (5) in the pump module, for receiving the driving source simultaneously
Generate laser.
10. solid state laser according to claim 9, which is characterized in that
The crystal module includes gain media crystal (7), saturated absorption crystal (8) resonant cavity, and the resonant cavity is set to
The light emission side of the slow axis collimating element (5), the gain media crystal (7) and saturated absorption crystal (8) are set to described humorous
In vibration chamber；Alternatively,
The crystal module includes gain media crystal (7) and saturated absorption crystal (8), the gain media crystal (7) and institute
It states saturated absorption crystal (8) and forms composite crystal, the composite crystal is set to the light emission side of the slow axis collimating element (5),
And on the light direction of the slow axis collimating element (5), two opposite end faces of the composite crystal form resonant cavity.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811354333.9A CN109256667A (en) | 2018-11-14 | 2018-11-14 | Pump module and solid state laser with it |
| PCT/CN2019/109560 WO2020098413A1 (en) | 2018-11-14 | 2019-09-30 | Pumping module and solid-state laser having same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811354333.9A CN109256667A (en) | 2018-11-14 | 2018-11-14 | Pump module and solid state laser with it |
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| CN109256667A true CN109256667A (en) | 2019-01-22 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811354333.9A Pending CN109256667A (en) | 2018-11-14 | 2018-11-14 | Pump module and solid state laser with it |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110518448A (en) * | 2019-08-23 | 2019-11-29 | 上海禾赛光电科技有限公司 | Solid state laser and its working method and laser radar |
| CN110535017A (en) * | 2019-09-12 | 2019-12-03 | 中国科学院苏州生物医学工程技术研究所 | All-solid-state yellow laser based on codope crystal |
| CN110718852A (en) * | 2019-09-26 | 2020-01-21 | 苏州长光华芯光电技术有限公司 | Polarization beam combination device and method |
| CN110940964A (en) * | 2019-12-31 | 2020-03-31 | 西安炬光科技股份有限公司 | Laser radar and signal identification method |
| WO2020098413A1 (en) * | 2018-11-14 | 2020-05-22 | 西安炬光科技股份有限公司 | Pumping module and solid-state laser having same |
| WO2021128828A1 (en) * | 2019-12-23 | 2021-07-01 | 南京先进激光技术研究院 | End-pump multi-pass slab laser amplifier |
| CN113567999A (en) * | 2020-04-09 | 2021-10-29 | 华为技术有限公司 | Laser device, laser radar system and control method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05299751A (en) * | 1992-04-17 | 1993-11-12 | Fuji Photo Film Co Ltd | Laser-diode pumping solid-state laser |
| CN103217803A (en) * | 2013-04-09 | 2013-07-24 | 中国科学院半导体研究所 | Polarization coupling device for semi-conductor laser device adopting prism |
| US20150177526A1 (en) * | 2013-12-24 | 2015-06-25 | Huawei Technologies Co., Ltd. | Optical Multiplexer and Transmitter Optical Subassembly |
| CN206211264U (en) * | 2016-11-02 | 2017-05-31 | 苏州长光华芯光电技术有限公司 | Light beam recombinates coupling device |
| CN209029672U (en) * | 2018-11-14 | 2019-06-25 | 西安炬光科技股份有限公司 | Pump module and solid state laser with it |
-
2018
- 2018-11-14 CN CN201811354333.9A patent/CN109256667A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05299751A (en) * | 1992-04-17 | 1993-11-12 | Fuji Photo Film Co Ltd | Laser-diode pumping solid-state laser |
| CN103217803A (en) * | 2013-04-09 | 2013-07-24 | 中国科学院半导体研究所 | Polarization coupling device for semi-conductor laser device adopting prism |
| US20150177526A1 (en) * | 2013-12-24 | 2015-06-25 | Huawei Technologies Co., Ltd. | Optical Multiplexer and Transmitter Optical Subassembly |
| CN206211264U (en) * | 2016-11-02 | 2017-05-31 | 苏州长光华芯光电技术有限公司 | Light beam recombinates coupling device |
| CN209029672U (en) * | 2018-11-14 | 2019-06-25 | 西安炬光科技股份有限公司 | Pump module and solid state laser with it |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020098413A1 (en) * | 2018-11-14 | 2020-05-22 | 西安炬光科技股份有限公司 | Pumping module and solid-state laser having same |
| CN110518448A (en) * | 2019-08-23 | 2019-11-29 | 上海禾赛光电科技有限公司 | Solid state laser and its working method and laser radar |
| CN110535017A (en) * | 2019-09-12 | 2019-12-03 | 中国科学院苏州生物医学工程技术研究所 | All-solid-state yellow laser based on codope crystal |
| CN110718852A (en) * | 2019-09-26 | 2020-01-21 | 苏州长光华芯光电技术有限公司 | Polarization beam combination device and method |
| WO2021128828A1 (en) * | 2019-12-23 | 2021-07-01 | 南京先进激光技术研究院 | End-pump multi-pass slab laser amplifier |
| CN110940964A (en) * | 2019-12-31 | 2020-03-31 | 西安炬光科技股份有限公司 | Laser radar and signal identification method |
| CN113567999A (en) * | 2020-04-09 | 2021-10-29 | 华为技术有限公司 | Laser device, laser radar system and control method thereof |
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