CN220040874U - Bessel beam array generating device - Google Patents
Bessel beam array generating device Download PDFInfo
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- CN220040874U CN220040874U CN202321696859.1U CN202321696859U CN220040874U CN 220040874 U CN220040874 U CN 220040874U CN 202321696859 U CN202321696859 U CN 202321696859U CN 220040874 U CN220040874 U CN 220040874U
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- 239000013307 optical fiber Substances 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 2
- 239000000835 fiber Substances 0.000 description 6
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001093 holography Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000005305 interferometry Methods 0.000 description 1
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- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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Abstract
The utility model belongs to the technical field of optical design, and particularly relates to a Bessel beam array generating device. The Bessel beam array generation device of the present utility model comprises: the device comprises a laser, a first lens, an optical fiber beam splitter, a Bessel beam module array and a second lens which are sequentially arranged, wherein the optical fiber beam splitter comprises a plurality of output optical fibers, the Bessel beam module array comprises a plurality of Bessel beam modules which are arranged in an array manner and are used for generating Bessel beams from beams output by corresponding output optical fibers, and therefore the Bessel beam array can be obtained before and after a focus of the second lens; the Bessel beam array generating device is simple in structure, economical and applicable.
Description
Technical Field
The utility model belongs to the technical field of optical design, and particularly relates to a Bessel beam array generating device.
Background
Diffraction is a very important feature of the beam itself, and Durnin first proposed a bessel beam in 1987, and found that the bessel beam had non-diffractive properties, durnin indicated that the intensity distribution had a first type of zero order bessel function form in any cross section perpendicular to the optical axis of the bessel beam. The non-diffracted beam is rapidly announced in the optical world to study the hot spot, and later, the Bessel beam is only one type of non-diffracted beam, and common non-diffracted beams include Mathieu beam, airy beam and the like.
Currently, several methods for generating bessel beam arrays are known: (1) N-wave interferometry, (2) holography, (3) Dammann grating, and (4) microstructure. However, these methods have the following general problems: the quality of the generated Bessel light beam is lower, the system for generating the light beam is complex, the cost is high, and the ever-increasing requirements of the Bessel light beam in the scientific research and application fields can not be met.
Disclosure of Invention
The utility model aims to provide a Bessel beam array generating device, which aims to solve the technical problem that the existing system for generating the Bessel beam array is complex.
In order to solve the above technical problems, the present utility model provides a bessel beam array generating apparatus, including: the device comprises a laser, a first lens, an optical fiber beam splitter, a Bessel beam module array and a second lens which are sequentially arranged; wherein the fiber optic splitter comprises a plurality of output fibers; the Bessel beam module array comprises a plurality of Bessel beam modules which are arranged in an array mode and are used for generating Bessel beams from the beams output by the corresponding output optical fibers.
Further, the bessel beam module includes that sets gradually: a collimating lens, a conical lens, a third lens and an aspherical lens.
Further, a multidimensional adjusting frame is arranged between the first lens and the input optical fiber of the optical fiber beam splitter.
Further, the end surfaces of the input optical fiber and the output optical fiber of the optical fiber beam splitter are respectively polished and plated with an antireflection film.
Further, the first lens is a focusing lens.
Further, the second lens is disposed at a focal point of the bessel beam generated by the bessel beam module array.
The utility model has the beneficial effects that the Bessel beam array generating device comprises: the device comprises a laser, a first lens, an optical fiber beam splitter, a Bessel beam module array and a second lens which are sequentially arranged, wherein the optical fiber beam splitter comprises a plurality of output optical fibers, the Bessel beam module array comprises a plurality of Bessel beam modules which are arranged in an array manner and are used for generating Bessel beams from beams output by corresponding output optical fibers, and therefore the Bessel beam array can be obtained before and after a focus of the second lens; the Bessel beam array generating device is simple in structure, economical and applicable.
Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and drawings.
In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a Bessel beam array generation apparatus according to a preferred embodiment of the present utility model;
fig. 2 is a schematic diagram of a bessel beam module according to a preferred embodiment of the present utility model.
In the figure:
the laser device comprises a laser device 01, a first lens 02, a fiber beam splitter 03, a Bessel beam module 04, a second lens 05, a CCD06, a Bessel beam array 07, a Bessel beam module array 08, a collimating lens 11, a conical lens 12, a third lens 13, an aspheric lens 14 and a focal depth 15.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, the present embodiment provides a bessel beam array generating apparatus, including: the laser 01, the first lens 02, the optical fiber beam splitter 03, the Bessel beam module array 08 and the second lens 05 are arranged in sequence; wherein the fiber optic splitter 03 comprises a plurality of output fibers; the bessel beam module array 08 includes a plurality of bessel beam modules 04 arranged in an array, and is configured to generate bessel beams from beams output by corresponding output fibers.
Specifically, after outputting the light beam, the laser 01 enters the optical fiber beam splitter 03 after being focused by the first lens 02, and the optical fiber beam splitter 03 can have a plurality of output optical fibers so as to output a plurality of independent light beams; each of the independent light beams respectively enters the corresponding bessel beam module 04, and the plural bessel beam modules are arranged as the bessel beam module array 08 shown in fig. 1, so that the bessel beam array 07 can be obtained.
In the embodiment, the Bessel beam array generating device is simple in structure, economical and applicable.
Referring to fig. 2, as an alternative embodiment of the bessel beam module 04, the bessel beam module 04 includes: a collimator lens 11, a conic lens 12, a third lens 13, and an aspherical lens 14.
Specifically, the output beam of the optical fiber beam splitter 03 is collimated by the plano-convex lens 11 in the bessel beam module 04, the collimated beam enters the conical lens 12 to generate a bessel beam, and then is subjected to imaging reduction or amplification by the third lens 13 and the aspheric lens 14 to generate a new bessel beam.
In this embodiment, optionally, a multidimensional adjusting frame is disposed between the first lens 02 and the input optical fiber of the optical fiber splitter 03.
Specifically, the multi-dimensional adjusting frame may be a six-axis adjusting frame for optical fiber coupling.
In this embodiment, optionally, the end surfaces of the input optical fiber and the output optical fiber of the optical fiber beam splitter 03 are respectively polished and plated with an antireflection film; the light beam loss can be reduced, and the light beam transmittance can be increased.
In this embodiment, optionally, the first lens 02 is a focusing lens.
In this embodiment, optionally, the second lens 05 is disposed at a focal point of the bessel beam generated by the bessel beam module array 08; the array of light beams may be focused.
It should be noted that, the first lens 02 mainly focuses the light beam and then couples the light beam into the optical fiber beam splitter 03, the focal length determines the size of a focusing light spot, the size of the focusing light spot affects the efficiency of coupling the light beam into the optical fiber beam splitter, and a person skilled in the art can debug the light beam as required; the focal depth and the light spot size of the final Bessel light beam can be determined by the position, the size relation and the like of each lens in the Bessel generation module 04, and the final Bessel light beam can be selected according to specific application scenes; the second lens 05 is used for focusing inner Seal beams generated by the Bessel beam module 04, so that the distance between the Bessel beams is reduced, the positions of the second lens 05 are required to be placed at the Bessel focus, and the model of the second lens 05 can be selected according to specific application scenes; the CCD06 is used for testing the final shape of the light spot of the Bessel beam array, and the final shape of the light spot is required to be placed at the front and back positions of the focal point of the lens 05, so that the size of the Bessel beam array is different due to different positions, and the Bessel beam array can be debugged according to actual application scenes.
In an application scene, a laser 01 outputs Gaussian beams, the beam M2 is less than 1.2, and the diameter of the laser 01 output beam can be 3mm after beam expansion; the beam after beam expansion passes through a first lens 02 of F100, and the focusing light spot size is 30um; the focusing light spot is coupled into an input optical fiber of the optical fiber beam splitter 03 through a multidimensional adjusting frame, and the end face of the optical fiber is polished and plated with an antireflection film; the laser beam outputs 9 independent beams after passing through the optical fiber beam splitter 03, and the end faces of the 9 output optical fibers are respectively polished and plated with an antireflection film; the output beam passes through the Bessel beam module 04 to generate a Bessel beam; as shown in fig. 2, the bessel beam module 04 is respectively composed of a collimating lens 11, a conical lens 12 with a base angle of 5 degrees, an F60 third lens 13 and an F11 aspheric lens 14, and finally forms bessel beams with focal depth 15 of 8mm and light spot size of 1.45 um; the second lens 05 of F100 is placed at the focal point of the bessel beam, and the bessel beam array 07 can be obtained with the CCD06 before and after the focal point of the second lens 05.
The CCD may be a camera for testing the spot profile.
The components (components not illustrating the specific structure) selected in the present utility model are common standard components or components known to those skilled in the art, and the structures and principles thereof are known to those skilled in the art through technical manuals or through routine experimental methods.
In the description of embodiments of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.
Claims (6)
1. A bessel beam array generating apparatus, comprising:
the device comprises a laser (01), a first lens (02), an optical fiber beam splitter (03), a Bessel beam module array (08) and a second lens (05) which are sequentially arranged; wherein the method comprises the steps of
The optical fiber beam splitter (03) comprises a plurality of output optical fibers;
the Bessel beam module array (08) comprises a plurality of Bessel beam modules (04) which are arranged in an array mode and are used for generating Bessel beams from beams output by corresponding output optical fibers.
2. The bessel beam array generating apparatus according to claim 1, wherein,
the Bessel beam module (04) comprises the following components in sequence: a collimating lens (11), a conical lens (12), a third lens (13) and an aspherical lens (14).
3. The bessel beam array generating apparatus according to claim 1, wherein,
a multidimensional adjusting frame is arranged between the first lens (02) and an input optical fiber of the optical fiber beam splitter (03).
4. The bessel beam array generating apparatus according to claim 1, wherein,
the end faces of the input optical fiber and the output optical fiber of the optical fiber beam splitter (03) are respectively polished and plated with an antireflection film.
5. The bessel beam array generating apparatus according to claim 1, wherein,
the first lens (02) is a focusing lens.
6. The bessel beam array generating apparatus according to claim 1, wherein,
the second lens (05) is arranged at the focus of the Bessel light beam generated by the Bessel light beam module array (08).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321696859.1U CN220040874U (en) | 2023-06-30 | 2023-06-30 | Bessel beam array generating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321696859.1U CN220040874U (en) | 2023-06-30 | 2023-06-30 | Bessel beam array generating device |
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| Publication Number | Publication Date |
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| CN220040874U true CN220040874U (en) | 2023-11-17 |
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| CN202321696859.1U Active CN220040874U (en) | 2023-06-30 | 2023-06-30 | Bessel beam array generating device |
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| CN (1) | CN220040874U (en) |
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- 2023-06-30 CN CN202321696859.1U patent/CN220040874U/en active Active
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