CN208753720U - A kind of big folding angles laser resonator - Google Patents
A kind of big folding angles laser resonator Download PDFInfo
- Publication number
- CN208753720U CN208753720U CN201821601530.1U CN201821601530U CN208753720U CN 208753720 U CN208753720 U CN 208753720U CN 201821601530 U CN201821601530 U CN 201821601530U CN 208753720 U CN208753720 U CN 208753720U
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- Prior art keywords
- mirror
- axis paraboloidal
- plane mirror
- astigmatism
- plane
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- 201000009310 astigmatism Diseases 0.000 abstract description 15
- 230000003287 optical effect Effects 0.000 abstract description 14
- 238000003780 insertion Methods 0.000 abstract description 3
- 230000037431 insertion Effects 0.000 abstract description 3
- 238000012634 optical imaging Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model provides a kind of big folding angles laser resonator, including the first plane mirror, the second plane mirror, the first off axis paraboloidal mirror and the second off axis paraboloidal mirror, wherein the first plane mirror and the second plane mirror are oppositely arranged, first off axis paraboloidal mirror and the second off axis paraboloidal mirror are oppositely arranged, wherein, first plane mirror is input mirror, and the second plane mirror is output diaphotoscope.The utility model off axis paraboloidal mirror belongs to normal optical imaging to the focusing of light beam itself, it may be implemented to focus collimated light beam with any incident angle degree or collimate the divergent beams of point light source, guarantee aberrationless, no color differnece during beam Propagation simultaneously, without astigmatism, therefore resonant cavity itself and be not present astigmatism, and the range of off-axis angle selection is very wide, is conducive to the insertion of optical element；Intracavitary to be not necessarily to astigmatism compensation element, structure is simple, and design is simple, the design without any theoretical calculation auxiliary resonance chamber.
Description
Technical field
The utility model relates to laser device technical fields, and in particular to a kind of big folding angles laser resonator.
Background technique
One of three big component parts as laser device, the effect of resonant cavity is most important, is that laser device realizes each
The central factor of kind property.It is distinguished by structure, laser resonator is segmented into two class of linear type resonant cavity and refrative cavity, and one
The realization of a little special laser activities must rely on refrative cavity, for example, inner cavity nonlinear frequency transformation require laser beam height to focus,
Travelling-wave cavity requires laser circulation oscillation etc., and the reflection loss of certain refrative cavity can be ignored, but necessarily have spherical mirror as folding
Folded mirror.The essential distinction of linear type resonant cavity and refrative cavity is that the incidence angle of the spherical mirror incident ray in refrative cavity is not
Zero.In practice, if the incidence angle of spherical mirror is relatively large, i.e., non-paraxial light is incident, can bring astigmatism.Astigmatism refers to
Light or light beam are with larger incidence angle after lens or spherical mirror are imaged, and image space light or light beam are in orthogonal both direction
The focal length experienced is different, can thus seriously affect image quality, such as: cross section is to become ellipse after circular light beam is imaged
Circle, while also will affect steady area's range of resonant cavity.Therefore, astigmatism factor must be taken into consideration in the design process of refrative cavity, as far as possible
Reduce astigmatism or compensation astigmatism.Intersect in addition, the design of partially folded chamber will appear optical path in chamber, on the one hand influences optical element
Placement；On the other hand it is long to increase chamber, is easy to cause resonant cavity beyond steady area, is unfavorable for the design of laser resonator, high power
Fuel factor is also very serious when operating.
Reducing spherical mirror incidence angle can reduce astigmatism, but can also seriously affect optical element simultaneously and make in resonant cavity
With, such as: the elements such as nonlinear optical crystal, optical-unidirectional device are difficult to be put into resonant cavity.Commonly astigmatism compensation method is
In the intracavitary Brewster piece for being put into special designing or lens to offset endovenous laser beam in the light being mutually perpendicular on two directions
Path difference, however intracavitary insertion optical element can bring loss and influence system stability, and system complex.Based on Gaussian beam
Transmission characteristic can also compensate astigmatism by multiple concave mirrors, however such method requires complicated calculating, and there is knots
The problem of structure complexity.
Summary of the invention
The utility model will provide a kind of wide-angle angle folding laser resonator, to guarantee that optical element is not affected
Ground is placed in resonant cavity, and any astigmatism is not present.
In order to achieve the above object, the utility model provides a kind of big folding angles laser resonator, including the first plane
Mirror, the second plane mirror, the first off axis paraboloidal mirror and the second off axis paraboloidal mirror, wherein the first plane mirror and the second plane mirror phase
To setting, the first off axis paraboloidal mirror and the second off axis paraboloidal mirror are oppositely arranged, wherein and the first plane mirror is input mirror, the
Two plane mirrors are output diaphotoscope.
Compared with prior art, the utility model has the advantages that:
1) the utility model provides constructed big folding angles laser resonator, and optical element can be inserted into as big as you please
In resonant cavity, various necessary functions can be simply and efficiently realized；
2) the utility model provides in constructed resonant cavity optical path without intersection, and it is long effectively to shorten chamber, is conducive to
The design of resonant cavity is particularly suitable for the travelling-wave cavity of high power operating；
3) off axis paraboloidal mirror belongs to normal optical imaging to the focusing of light beam itself, may be implemented with any incident angle degree
Focus collimated light beam or collimate the divergent beams of point light source, at the same guarantee aberrationless during beam Propagation, no color differnece, without as
Dissipate, thus resonant cavity itself and be not present astigmatism, and off-axis angle selection range it is very wide, be conducive to the insertion of optical element；
4) intracavitary to be not necessarily to astigmatism compensation element, structure is simple, and design is simple, without any theoretical calculation auxiliary resonance chamber
Design.
Detailed description of the invention
Fig. 1 is that off axis paraboloidal mirror focuses directional light schematic diagram；
Fig. 2 is the structural schematic diagram of embodiment；
Fig. 3 is that embodiment position 1 exports laser cross-section light spot shape；
Fig. 4 is that embodiment position 2 exports laser cross-section light spot shape.
The reference numerals are as follows:
1- collimated light beam, 2- incidence off axis paraboloidal mirror, 3- incidence light center, 4- focus, 5- reflected light, the first plane of 6-
Mirror, the first off axis paraboloidal mirror of 7-, the second plane mirror of 8-, the second off axis paraboloidal mirror of 9-, 10- fibre coupled laser diode,
11- optical transmission system, 12- laser medium, 13- optical-unidirectional device.
Specific embodiment
The utility model is described in detail below in conjunction with drawings and examples.
The design principle of the utility model, which refers to, separates the arbitrary surface at the non-central axes of rotational symmetry paraboloid
As reflecting surface, to realize the separation of incident beam and focus on light beam.
Referring to Fig. 1, the basic principle of the utility model is: in intracavitary setting off axis paraboloidal mirror, the collimated light beam 1 enters
Penetrate off axis paraboloidal mirror 2, through off axis paraboloidal mirror 2 reflect focus, incident light center 3 to focus 4 apart from be reflection focal length, incidence
Angle between light and reflected light 5 is referred to as off-axis angle, can select in 90o to 180o.
Referring to fig. 2, a kind of big folding angles laser resonator provided by the utility model is applied to diode end-face pump
Nd:GdVO4On 912 nm ring lasers.
Described laser resonator is off-axis by the first plane mirror 6, the second plane mirror 9, the first off axis paraboloidal mirror 7 and second
Paraboloidal mirror 8 forms, wherein the first plane mirror 6 and the second plane mirror 9 are oppositely arranged, the first off axis paraboloidal mirror 7 and second from
Axis paraboloidal mirror 8 is oppositely arranged, wherein the first plane mirror 6 is input mirror, and the second plane mirror 9 is output diaphotoscope.Pumping source is
Central wavelength is the fibre coupled laser diode 10 of 808 nm, and fiber numerical aperture 0.12, core diameter are 300 mm, through optical fiber
The pump light of coupling output focuses in laser medium 12 through optical transmission system 11.In this configuration, the first plane mirror 6,
One off axis paraboloidal mirror 7, the second plane mirror 9 and the second annularly setting of off axis paraboloidal mirror 8.Described optical fiber-coupled laser two
The parallel beam incident first that pole pipe 10, optical transmission system 11, laser resonator and 12 collective effect of laser medium generate from
Axis paraboloidal mirror 7 focuses on the second plane mirror 9 through the reflection of the first off axis paraboloidal mirror 7, incident light center 3 to focus 4 apart from for
Reflection focal length, the angle between incident light and reflected light 5 are referred to as off-axis angle, are 90o, the hair of the second plane mirror 9 in the present embodiment
Light is penetrated through incident second off axis paraboloidal mirror 8 of optical-unidirectional device 13, focuses on the first plane through the reflection of the second off axis paraboloidal mirror 8
On mirror 6, off-axis angle is also 90o herein, and the reflected light through the first plane mirror 6 is through the incident first off-axis parabolic again of laser medium 12
Face mirror 7 simultaneously repeats above procedure, forms laser in cycles.
In the present embodiment, the intracavitary of laser resonator is provided with off axis paraboloidal mirror, be set as needed there are two, simultaneously
According to the setting of the needs of incident emitting light path, there are two plane mirrors, to build complete optical path.In the intracavitary of laser resonator
It is arranged under thinking as off axis paraboloidal mirror, there can be many design schemes.If it is multiple, multiple off axis paraboloidal mirrors
Ring-type setting.
Output laser facula the profile such as Fig. 3 and Fig. 4 measured at two different locations behind the second plane mirror 9 in experiment
It is shown, it can be seen that output laser cross-section light spot shape is standard circular, that is, any astigmatism is not present, to prove this structure
Reasonability.
Claims (1)
1. a kind of big folding angles laser resonator, it is characterised in that: including the first plane mirror (6), the second plane mirror (9),
One off axis paraboloidal mirror (7) and the second off axis paraboloidal mirror (8), first plane mirror (6) and the second plane mirror (9) are opposite to be set
It sets, the first off axis paraboloidal mirror (7) and the second off axis paraboloidal mirror (8) are oppositely arranged, and first plane mirror (6) is input
Mirror, the second plane mirror (9) are output diaphotoscope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821601530.1U CN208753720U (en) | 2018-09-29 | 2018-09-29 | A kind of big folding angles laser resonator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821601530.1U CN208753720U (en) | 2018-09-29 | 2018-09-29 | A kind of big folding angles laser resonator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208753720U true CN208753720U (en) | 2019-04-16 |
Family
ID=66085305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821601530.1U Expired - Fee Related CN208753720U (en) | 2018-09-29 | 2018-09-29 | A kind of big folding angles laser resonator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208753720U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110737103A (en) * | 2019-10-31 | 2020-01-31 | 中国科学院长春光学精密机械与物理研究所 | large-caliber off-axis catadioptric multichannel optical system assembling and adjusting method |
-
2018
- 2018-09-29 CN CN201821601530.1U patent/CN208753720U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110737103A (en) * | 2019-10-31 | 2020-01-31 | 中国科学院长春光学精密机械与物理研究所 | large-caliber off-axis catadioptric multichannel optical system assembling and adjusting method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190416 |