CN212207735U - Optical fiber capable of transmitting double light beams - Google Patents
Optical fiber capable of transmitting double light beams Download PDFInfo
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- CN212207735U CN212207735U CN202021098964.1U CN202021098964U CN212207735U CN 212207735 U CN212207735 U CN 212207735U CN 202021098964 U CN202021098964 U CN 202021098964U CN 212207735 U CN212207735 U CN 212207735U
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Abstract
The utility model discloses an optic fibre of transmissible two light beams, this optic fibre include first fibre core, first cladding, second fibre core, second cladding, coating, the first fibre core outside is provided with first cladding, first cladding outside is provided with the second fibre core, the second fibre core outside is provided with the second cladding, the second cladding outside is provided with the coating, first fibre core is circular fibre core, exports circular facula, the second fibre core is annular fibre core, forms annular facula, first fibre core with the refracting index of second fibre core is higher than respectively first cladding with the refracting index of second cladding, circular light beam and annular light beam are in respectively first fibre core with transmit in the second fibre core. The utility model discloses realize that double beam transmission has the significance to the application of expanding the optic fibre laser.
Description
Technical Field
The utility model relates to an optic fibre laser technical field especially relates to an optic fibre of two light beams of transmissible.
Background
The fiber laser has the advantages of high conversion efficiency, good beam quality, compact structure, convenient maintenance and the like, is rapidly developed in recent years, has been widely applied in the fields of scientific research, industrial manufacturing, national defense safety and the like, and is one of the important directions of high-power laser development in the future. At present, the output optical fiber of the traditional optical fiber laser is a double-cladding single-core optical fiber, at the laser output end, cladding light easily damages an optical fiber laser optical fiber device and is stripped by a cladding light filter, the output laser is mainly output in a fiber core laser mode, and the size of the fiber core also determines the form of an output light spot.
With the gradual wide application field range of the optical fiber laser, the combination of the annular light spot and the circular light spot in special application occasions can greatly improve the industrial application efficiency, and meanwhile, if the wavelength among different light spots is selectable and the energy proportion among different light spots can be randomly controlled, the application efficiency and the application range of the industrial optical fiber laser can be greatly improved, particularly in the welding field, the content is the problem to be solved by the existing optical fiber.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problems, the utility model provides an optical fiber capable of transmitting double light beams, which aims to provide a solution for realizing double light beam transmission and has important significance for expanding the application of optical fiber laser.
The utility model adopts the technical proposal that:
a dual-beam transmitting optical fiber includes a first core, a first cladding, a second core, a second cladding, and a coating layer, the first cladding is arranged on the outer side of the first fiber core, the second fiber core is arranged on the outer side of the first cladding, a second cladding is arranged on the outer side of the second fiber core, a coating layer is arranged on the outer side of the second cladding, the first fiber core is a circular fiber core and outputs a circular light spot, the second fiber core is an annular fiber core and forms an annular light spot, the refractive indexes of the first fiber core and the second fiber core are respectively higher than those of the first cladding and the second cladding, the circular light beam and the annular light beam are respectively transmitted in the first fiber core and the second fiber core, the circular light beam and the annular light beam can select light with the same wavelength or light with different wavelengths according to requirements, and the energy of the two light beams can be adjusted in any proportion according to requirements.
The diameter of the first fiber core is 20-100 microns, which can ensure the energy transmitted by the first fiber core and the beam quality of the light of the first fiber core, the diameter of the second fiber core is 200-600 microns, which is mainly used for forming a high-energy annular beam, the diameter of the first cladding is 100-200 microns, which is determined according to the size of the first fiber core, the diameter of the second cladding is 600-800 microns, which is determined according to the size of the second fiber core, and the diameter of the second cladding is greater than 20-100 microns of the diameter of the second fiber core.
Wherein the first cladding layer and the second cladding layer lower the refractive index of the material by doping with fluorine.
The numerical aperture formed by the first fiber core and the first cladding is 0.22, different numerical apertures can be set according to requirements, the numerical aperture formed by the second fiber core and the first cladding and the second cladding is 0.22, and different numerical apertures can be set according to requirements.
The utility model has the advantages as follows:
1. the double-core optical fiber comprises a first fiber core, a second fiber core, a first cladding, a second cladding, a coating layer and a double-core optical fiber, wherein the first fiber core is a circular fiber core and is used for transmitting a circular light spot, the second fiber core is a circular fiber core and is used for transmitting a circular light spot, the first cladding is positioned between the first fiber core and the second fiber core, the second cladding is positioned between the second fiber core and the coating layer, and the refractive indexes of the first fiber core and the second fiber core are larger than those of the first cladding and the second cladding, so that light is transmitted in the first fiber core and the second fiber core, and;
2. the realization of double-beam transmission is significant for expanding the application of fiber laser.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of a dual-beam transmissive optical fiber according to the present invention;
fig. 2 is a schematic longitudinal structure diagram of a dual-beam transmissive optical fiber according to the present invention.
The reference numerals are explained below:
1. a first core; 2. a first cladding layer; 3. a second core; 4. a second cladding layer; 5. and coating the layer.
Detailed Description
The present invention will be further described below, but the present invention is not limited to these contents.
Example 1
An optical fiber capable of transmitting double light beams comprises a first fiber core 1, a first cladding 2, a second fiber core 3, a second cladding 4 and a coating layer 5, wherein the first cladding 2 is arranged on the outer side of the first fiber core 1, the second fiber core 3 is arranged on the outer side of the first cladding 2, the second cladding 4 is arranged on the outer side of the second fiber core 3, and the coating layer 5 is arranged on the outer side of the second cladding 4; the first fiber core 1 is a circular fiber core and outputs a circular light spot, and the second fiber core 3 is an annular fiber core and forms an annular light spot; the refractive indexes of the first fiber core 1 and the second fiber core 3 are respectively higher than the refractive indexes of the first cladding layer 2 and the second cladding layer 4, the circular light beam and the annular light beam are respectively transmitted in the first fiber core 1 and the second fiber core 3, the circular light beam and the annular light beam select light with the same wavelength, and the energy of the two light beams can be adjusted in any proportion as required; the diameter of the first fiber core 1 is 60 microns, which can ensure the energy transmitted by the first fiber core 1 and the light beam quality of the light of the first fiber core 1, the diameter of the second fiber core 3 is 500 microns and is mainly used for forming a high-energy annular light beam, the diameter of the first cladding 2 is 120 microns, and the diameter of the second cladding 4 is 600 microns; the first cladding layer 2 and the second cladding layer 4 reduce the refractive index of the material by doping fluorine; the numerical aperture formed by the first core 1 and the first cladding 2 is 0.22, and the numerical aperture formed by the second core 3 and the first cladding 2 and the second cladding 4 is 0.22.
Example 2
An optical fiber capable of transmitting double light beams comprises a first fiber core 1, a first cladding 2, a second fiber core 3, a second cladding 4 and a coating layer 5, wherein the first cladding 2 is arranged on the outer side of the first fiber core 1, the second fiber core 3 is arranged on the outer side of the first cladding 2, the second cladding 4 is arranged on the outer side of the second fiber core 3, and the coating layer 5 is arranged on the outer side of the second cladding 4; the first fiber core 1 is a circular fiber core and outputs a circular light spot, and the second fiber core 3 is an annular fiber core and forms an annular light spot; the refractive indexes of the first fiber core 1 and the second fiber core 3 are respectively higher than the refractive indexes of the first cladding layer 2 and the second cladding layer 4, the circular light beam and the annular light beam are respectively transmitted in the first fiber core 1 and the second fiber core 3, the circular light beam and the annular light beam select light with different wavelengths, and the energy of the two light beams can be adjusted in any proportion as required; the diameter of the first fiber core 1 is 100 microns, which can ensure the energy transmitted by the first fiber core 1 and the light beam quality of the light of the first fiber core 1, the diameter of the second fiber core 3 is 600 microns, which is mainly used for forming a high-energy annular light beam, the diameter of the first cladding 2 is 150 microns, and the diameter of the second cladding 4 is 650 microns; the first cladding layer 2 and the second cladding layer 4 reduce the refractive index of the material by doping fluorine; the numerical aperture formed by the first core 1 and the first cladding 2 is 0.22, and the numerical aperture formed by the second core 3 and the first cladding 2 and the second cladding 4 is 0.22.
Example 3
An optical fiber capable of transmitting double light beams comprises a first fiber core 1, a first cladding 2, a second fiber core 3, a second cladding 4 and a coating layer 5, wherein the first cladding 2 is arranged on the outer side of the first fiber core 1, the second fiber core 3 is arranged on the outer side of the first cladding 2, the second cladding 4 is arranged on the outer side of the second fiber core 3, and the coating layer 5 is arranged on the outer side of the second cladding 4; the first fiber core 1 is a circular fiber core and outputs a circular light spot, and the second fiber core 3 is an annular fiber core and forms an annular light spot; the refractive indexes of the first fiber core 1 and the second fiber core 3 are respectively higher than the refractive indexes of the first cladding layer 2 and the second cladding layer 4, the circular light beam and the annular light beam are respectively transmitted in the first fiber core 1 and the second fiber core 3, the circular light beam and the annular light beam select light with the same wavelength, and the energy of the two light beams can be adjusted in any proportion as required; the diameter of the first fiber core 1 is 20 microns, which can ensure the energy transmitted by the first fiber core 1 and the light beam quality of the light of the first fiber core 1, the diameter of the second fiber core 3 is 600 microns and is mainly used for forming a high-energy annular light beam, the diameter of the first cladding 2 is 100 microns, and the diameter of the second cladding 4 is 700 microns; the first cladding layer 2 and the second cladding layer 4 reduce the refractive index of the material by doping fluorine; the numerical aperture formed by the first core 1 and the first cladding 2 is 0.22, and the numerical aperture formed by the second core 3 and the first cladding 2 and the second cladding 4 is 0.22.
It is pointed out that, for the person skilled in the art, without departing from the inventive concept, several variants and modifications are possible, which all fall within the scope of protection of the invention.
Claims (4)
1. A double-beam transmissible optical fiber is characterized by comprising a first fiber core (1), a first cladding (2), a second fiber core (3), a second cladding (4) and a coating layer (5), the first cladding (2) is arranged outside the first fiber core (1), the second fiber core (3) is arranged outside the first cladding (2), a second cladding (4) is arranged on the outer side of the second fiber core (3), a coating layer (5) is arranged on the outer side of the second cladding (4), the first fiber core (1) is a circular fiber core and outputs a circular light spot, the second fiber core (3) is an annular fiber core and forms an annular light spot, the refractive index of the first core (1) and the second core (3) is higher than the refractive index of the first cladding (2) and the second cladding (4), respectively, and a circular beam and a ring beam are transmitted in the first core (1) and the second core (3), respectively.
2. A dual beam transmissive optical fiber as claimed in claim 1, wherein: the diameter of the first fiber core (1) is 20-100 micrometers, the diameter of the second fiber core (3) is 200-600 micrometers, the diameter of the first cladding (2) is 100-200 micrometers, the diameter of the second cladding (4) is 600-800 micrometers, and the diameter of the second cladding (4) is greater than 20-100 micrometers of the diameter of the second fiber core (3).
3. A dual beam transmissive optical fiber as claimed in claim 1, wherein: the first cladding layer (2) and the second cladding layer (4) reduce the refractive index of the material by doping with fluorine.
4. A dual beam transmissive optical fiber as claimed in claim 1, wherein: the numerical aperture formed by the first core (1) and the first cladding (2) is 0.22, and the numerical aperture formed by the second core (3) and the first cladding (2) and the second cladding (4) is 0.22.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021098964.1U CN212207735U (en) | 2020-06-15 | 2020-06-15 | Optical fiber capable of transmitting double light beams |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021098964.1U CN212207735U (en) | 2020-06-15 | 2020-06-15 | Optical fiber capable of transmitting double light beams |
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| CN212207735U true CN212207735U (en) | 2020-12-22 |
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| CN202021098964.1U Active CN212207735U (en) | 2020-06-15 | 2020-06-15 | Optical fiber capable of transmitting double light beams |
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- 2020-06-15 CN CN202021098964.1U patent/CN212207735U/en active Active
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