CN215180998U - High-power multi-core tail fiber and collimator thereof - Google Patents

High-power multi-core tail fiber and collimator thereof Download PDF

Info

Publication number
CN215180998U
CN215180998U CN202120693353.XU CN202120693353U CN215180998U CN 215180998 U CN215180998 U CN 215180998U CN 202120693353 U CN202120693353 U CN 202120693353U CN 215180998 U CN215180998 U CN 215180998U
Authority
CN
China
Prior art keywords
fiber
power
waveguide
core
waveguides
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202120693353.XU
Other languages
Chinese (zh)
Inventor
徐杰
方洋
绪海波
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
O Net Technologies Shenzhen Group Co Ltd
Original Assignee
O Net Communications Shenzhen Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by O Net Communications Shenzhen Ltd filed Critical O Net Communications Shenzhen Ltd
Application granted granted Critical
Publication of CN215180998U publication Critical patent/CN215180998U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Optical Couplings Of Light Guides (AREA)

Abstract

The utility model relates to the field of optical modules, in particular to a high-power multi-core tail fiber and a collimator thereof; the high-power multi-core tail fiber comprises a plurality of optical fibers with bare fiber areas, a plurality of waveguides and capillaries, wherein the waveguides are connected with the end parts of the bare fiber areas in a one-to-one mode; the utility model increases the receiving and transmitting area of the end face of the optical fiber by arranging a waveguide at the tail fiber of each optical fiber, reduces the optical power density under the condition of the same energy, and realizes the transmission and the receiving of high-power laser; furthermore, the waveguides are arranged in a cubic shape, so that gaps among the waveguides are effectively reduced, the usage amount of glue layers among the waveguides is further reduced, the purposes of tight arrangement and reduction of liquid seepage are achieved, and the high-power resistance of the high-power multicore tail fiber is further improved.

Description

High-power multi-core tail fiber and collimator thereof
Technical Field
The utility model relates to an optical module field, concretely relates to high power multicore tail optical fiber and collimater thereof.
Background
Along with the expansion of optical communication and optical fiber laser application, the requirement on high power resistance is increasingly improved, and particularly in a high-power laser, the power density of high-power laser emitted and received through the end face of an optical fiber is very high, so that the end face film system is easily irreversibly damaged, and the optical fiber Pigtai is burnt. Considering the adjustability of the coupling efficiency of the collimator and the realization of multi-core Pigtai l optical branch adjustment, the conventional fusion-splicing integrated optical fiber collimator cannot meet the requirements, the fusion-splicing stability cannot be guaranteed, and the mass production is difficult.
With the expansion of the application range of short-wavelength and high-power optical fiber transmission, the problem of burning out of a collimator frequently occurs, and the main reason is that the micro-particles are transferred due to the optical tweezers effect, so that the micro-particles are gathered near the core diameter of a light passing surface, and the light passing surface is burnt out; in addition, for the single-core optical fiber Pigtai, the single-core optical fiber Pigtai has the characteristic of tight fit of the size and the capillary, the filling glue is not too much, and the optimal bonding effect can be achieved; therefore, how to consider the multi-core adjustable collimator of the collimator becomes a great development direction of the transformation type high-power optical fiber collimator.
Therefore, it is important to design a high-power multi-fiber pigtail and its collimator which can simultaneously take into account high power and multiple adjustable cores.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide a can compromise high power and multicore adjustable high power multi-fiber tail optical fiber and collimater simultaneously, overcome the defect that tail optical fiber easily burns out among the prior art high power collimater.
The utility model provides a technical scheme that its technical problem adopted is: the high-power multi-core tail fiber is provided, and the preferable scheme is as follows: the high-power multi-core tail fiber comprises a plurality of optical fibers with bare fiber areas, a plurality of waveguides and capillaries, wherein the waveguides are connected with the end parts of the bare fiber areas in a one-to-one mode, the optical fibers and the waveguides are fixedly arranged in the capillaries, incident light enters the waveguides through the optical fibers, and high-power output is achieved after the optical power density of the incident light is reduced through the waveguides.
Wherein, the preferred scheme is as follows: the waveguide is a cubic waveguide.
Wherein, the preferred scheme is as follows: and the optical fiber and the waveguide are both fixed in the capillary tube by bonding through glue.
Wherein, the preferred scheme is as follows: and the bare fiber area of the optical fiber and the waveguide low-folding glue are fixedly bonded with the capillary tube.
Wherein, the preferred scheme is as follows: and the non-bare fiber area of the optical fiber is fixedly bonded with the capillary tube through high-folding glue.
Wherein, the preferred scheme is as follows: and annular gaskets are wrapped outside the bare fiber area and the waveguide to separate the low-folding glue from the high-folding glue.
The preferable scheme is that the length of the waveguide and the side length of the light-passing surface are determined according to the corresponding optical fiber, the wavelength of incident light and the ratio of the size of the incident light energy field to the size of the light-passing surface, and the lengths and the side lengths of the light-passing surface accord with:
Figure BDA0003008257660000021
wherein Z is the length of the waveguide and ω isLength of the light-passing surface of the waveguide, omega0Is the mode field diameter of the optical fiber corresponding to the waveguide, λ is the wavelength of the incident light, and ε is the ratio of the incident light energy field size to the light-passing surface size.
Wherein, the preferred scheme is as follows: the capillary is a square capillary.
For solving the problem that prior art exists, the utility model discloses still a high power collimator, its preferred scheme lies in: the high-power collimator comprises the high-power multi-core tail fiber, a lens coupled with the high-power multi-core tail fiber, and a glass tube sleeved outside the lens and the high-power multi-core tail fiber and used for fixing the lens and the high-power multi-core tail fiber.
Wherein, the preferred scheme is as follows: and the high-power multi-core tail fiber and the lens are fixedly bonded with the glass tube through glue.
The utility model has the advantages that compared with the prior art, the utility model designs a high-power multicore tail fiber and collimator thereof, which realizes the characteristics of high power and multicore adjustability, increases the receiving and transmitting area of the end surface of the fiber by arranging a waveguide at the tail fiber of each fiber, reduces the optical power density under the same energy condition, and realizes the transmission and reception of high-power laser; furthermore, the waveguides are arranged in a cubic shape, so that gaps among the waveguides are effectively reduced, the usage amount of glue layers among the waveguides is further reduced, the purposes of tight arrangement and reduction of liquid seepage are achieved, and the high-power resistance of the high-power multicore tail fiber is further improved.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic structural diagram of a high-power multi-core pigtail of the present invention;
fig. 2 is a schematic structural diagram of a high-power multicore pigtail of the present invention;
fig. 3 is a schematic structural diagram of a waveguide according to the present invention;
fig. 4 is a schematic structural diagram of a high power collimator according to the present invention.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1-3, the present invention provides a preferred embodiment of a high power multicore pigtail.
Referring to fig. 1, the high-power multi-core pigtail includes a plurality of optical fibers 11 with bare fiber regions 111, a plurality of waveguides 12 connected with end portions of the bare fiber regions 111 in a one-to-one manner, and capillaries 13, where the optical fibers 11 and the waveguides 12 are both fixedly disposed in the capillaries, and incident light is emitted into the waveguides 12 through the optical fibers 11, and the optical power density of the incident light is reduced by the waveguides 12, so that high-power output is achieved.
Specifically, because the light passing surface of the ordinary optical fiber is small, and the optical power density of the high-power laser is high, when the high-power laser is emitted or received through the end surface of the ordinary optical fiber, the optical tweezers effect causes the micro-particles to be transferred, so that the micro-particles are gathered near the core diameter of the light passing surface, and the end surface film system of the optical fiber is irreversibly damaged, and the optical fiber tail fiber is burnt in serious cases. The principle mainly comprises the following steps: the light beam emitted into the waveguide through the fiber pigtail is free from constraint by adding the waveguide and is freely dispersed in the waveguide, so that the diameter of the light beam is increased, and the optical power density of the light beam at the interface of the waveguide and air is reduced.
It should be noted that the connection between the end portion of the bare fiber region 111 of the optical fiber 11 and the waveguide 12 is fusion splicing, in which the waveguide 12 is first fusion spliced to the end portion of the bare fiber region 111, and then the fusion spliced waveguide fibers are inserted into the capillary and fixed in an array arrangement manner.
Further, before the welded waveguide fibers are inserted into the capillary in an array arrangement mode, a fixed-length tool with a grinding angle can be used for adjusting the alignment mode of the lower waveguide and the length of the waveguide so as to keep the ground length of the waveguide consistent.
In order to improve the performance of the high-power multi-core tail fiber, the finish of the end face of the bare fiber region to be welded with the waveguide needs to reach lambda/8 @632.8 nm.
Further, and referring to fig. 2, the optical fiber 11 and the waveguide 12 are adhesively secured within the capillary 13 by glue 14. The main bonding mode is as follows: the bare fiber region 111 of the optical fiber 11 and the waveguide 12 are fixedly bonded with the capillary 13 by low-folding glue 141; and adhering and fixing the non-bare fiber region of the optical fiber 11 with the capillary 13 by high-folding glue 142.
Specifically, the bare fiber region 111 and the waveguide 12 region are light-passing regions, and low-folding glue is adopted near the light-passing regions, so that the influence of the optical tweezers effect can be effectively avoided, and the optical tweezers cannot fail easily in a long-term high-temperature environment.
Further, in order to better isolate the low-folding glue and the high-folding glue, the waveguide array region and the bare fiber region can be wrapped by an annular gasket; so as to improve the high-power resistance of the high-power multi-core tail fiber.
After the welded waveguide fibers are inserted into the capillary in an array arrangement mode, low-folding glue is adopted to wrap the waveguide and the bare fiber region, high-folding glue is filled after the waveguide and the bare fiber region are solidified, grinding and coating are carried out on the high-power multi-core tail fiber according to a preset length and a preset grinding angle, and a hard film system can be adopted for coating to further improve the high-power resistance of the high-power multi-core tail fiber.
Further, and with reference to FIG. 3, the waveguide is a cubical waveguide.
Specifically, the waveguide may be a cubic glass column, and the conventional glass column is cylindrical, but in this embodiment, in order to further optimize the high-power multi-core pigtail, the cubic glass column is selected, which is mainly because the cylindrical glass column still has a large gap after being tightly arranged, when the cylindrical glass column is tightly arranged and inserted into the capillary and after being filled with low-folding glue, the number of glue layers is still large, and because the tightness is not enough and the inter-core-diameter gap glue is too much, the liquid leakage on the light-passing surface and the burning-out of the light-passing surface are easily caused by the long-term optical tweezer effect and the high power. If the square glass columns are adopted, after the square glass columns are tightly arranged, gaps among the square glass columns can be effectively reduced, and then glue layers among the cubic waveguides are reduced, so that the purposes of tightly arranging and reducing seepage are achieved, the high-power resistance performance of the high-power multicore tail fiber is further improved, and the stability of the high-power multicore tail fiber is further improved.
Further, the length of the waveguide 12 and the side length of the light-passing surface may be determined according to the corresponding optical fiber, the wavelength of the incident light, and the ratio of the size of the incident light energy field to the size of the light-passing surface, and specifically, the following formula is satisfied:
Figure BDA0003008257660000061
wherein Z is the length of the waveguide, omega is the length of the light-passing surface of the waveguide0Is the mode field diameter of the optical fiber corresponding to the waveguide, λ is the wavelength of the incident light, and ε is the ratio of the incident light energy field size to the light-passing surface size.
Specifically, after the mode field diameter, the side length of the light-passing surface of the waveguide, the length of the waveguide and the wavelength of incident light are confirmed, a corresponding three-dimensional waveguide model can be simulated and drawn, the size of an energy field which can be covered by the waveguide can be calculated through the three-dimensional waveguide model, and the ratio relation between the size of the energy field and the size of the light-passing surface of the waveguide is further obtained; after the specific relation between the size of the energy field and the size of the light-passing surface is obtained, the value of epsilon is confirmed, so that the length of the waveguide to be selected and the side length of the light-passing surface can be confirmed according to the mode field diameter and the incident light wavelength of the optical fiber in an actual scene, the light-passing area of the waveguide can be ensured to just cover the whole energy field of the incident light, no light energy is lost, no redundant space is occupied, and the size tight-fitting requirement of the capillary tube is further met.
Further, in order to further meet the tight fitting requirement, the capillary tube is a square capillary tube.
Specifically, the waveguide is a cubic waveguide, and the square capillary tube can reduce the gap between the waveguide and the cubic waveguide after assembly, so that the tight fit degree of the waveguide is improved.
As shown in fig. 4, the present invention also provides a preferred embodiment of a high power collimator.
A high-power collimator, referring to fig. 4, includes the high-power multi-core pigtail 1, a lens 2 coupled to the high-power multi-core pigtail 1, and a glass tube 3 sleeved outside the lens 2 and the high-power multi-core pigtail 1 and fixing the same.
Specifically, the high-power collimator reduces the received and emitted optical power density by adding the rectangular waveguide, and realizes the power conversion from a low-power collimator to the high-power collimator; and, the high power collimator can realize the micro-adjustment of the coupling efficiency and the working distance by controlling the space gap as the conventional collimator.
Furthermore, the high-power multi-core tail fiber and the lens are fixedly bonded with the glass tube through glue.
Specifically, the high-power multicore pigtail, the lens and the glass tube may be fixed by glue, or other fixing methods may be selected according to actual needs, for example, interference fit, fixing by a fixing member, stress engagement, or clearance fit.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, which is intended to cover all equivalent changes and modifications made within the scope of the present invention.

Claims (10)

1. A high-power multicore pigtail, its characterized in that: the high-power multi-core tail fiber comprises a plurality of optical fibers with bare fiber areas, a plurality of waveguides and capillaries, wherein the waveguides are connected with the end parts of the bare fiber areas in a one-to-one mode, the optical fibers and the waveguides are fixedly arranged in the capillaries, incident light enters the waveguides through the optical fibers, and high-power output is achieved after the optical power density of the incident light is reduced through the waveguides.
2. The high power multi-core pigtail fiber of claim 1, wherein: the waveguide is a cubic waveguide.
3. The high power multi-core pigtail fiber of claim 1, wherein: and the optical fiber and the waveguide are both fixed in the capillary tube by bonding through glue.
4. The high power multi-core pigtail fiber of claim 3, wherein: and the bare fiber area of the optical fiber and the waveguide low-folding glue are fixedly bonded with the capillary tube.
5. The high power multi-core pigtail fiber of claim 4, wherein: and the non-bare fiber area of the optical fiber is fixedly bonded with the capillary tube through high-folding glue.
6. The high power multi-core pigtail fiber of claim 5, wherein: and annular gaskets are wrapped outside the bare fiber area and the waveguide to separate the low-folding glue from the high-folding glue.
7. The high power multi-core pigtail of claim 1, wherein the length of the waveguide and the length of the side of the light-transmitting surface are determined according to the corresponding optical fiber, the wavelength of the incident light and the ratio of the size of the incident light energy field to the size of the light-transmitting surface, and are in accordance with:
Figure FDA0003008257650000011
wherein Z is the length of the waveguide, omega is the length of the light-passing surface of the waveguide0Is the mode field diameter of the optical fiber corresponding to the waveguide, λ is the wavelength of the incident light, and ε is the ratio of the incident light energy field size to the light-passing surface size.
8. The high power multi-core pigtail fiber of claim 1, wherein: the capillary is a square capillary.
9. A high power collimator, characterized by: the high-power collimator comprises the high-power multi-core pigtail fiber as claimed in any one of claims 1 to 8, a lens coupled with the high-power multi-core pigtail fiber, and a glass tube sleeved outside the lens and the high-power multi-core pigtail fiber and fixing the lens and the high-power multi-core pigtail fiber.
10. The high power collimator of claim 9, wherein: and the high-power multi-core tail fiber and the lens are fixedly bonded with the glass tube through glue.
CN202120693353.XU 2021-03-31 2021-04-06 High-power multi-core tail fiber and collimator thereof Active CN215180998U (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202120659945 2021-03-31
CN202120659945X 2021-03-31

Publications (1)

Publication Number Publication Date
CN215180998U true CN215180998U (en) 2021-12-14

Family

ID=79358011

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120693353.XU Active CN215180998U (en) 2021-03-31 2021-04-06 High-power multi-core tail fiber and collimator thereof

Country Status (1)

Country Link
CN (1) CN215180998U (en)

Similar Documents

Publication Publication Date Title
EP1579257B1 (en) Optical fiber lens and method of manufacture
JPH04333808A (en) Photosemiconductor module
CN108490546B (en) Optical waveguide mode converter for improving optical waveguide transmission characteristics
GB2301197A (en) In line two pass fibre optic rotary joint
CN103454730A (en) Optical fiber collimator
CN202837591U (en) Diaphragm type optical fiber laser coupler
CN113866892B (en) Laser fiber coupler and manufacturing method thereof
CN101435899B (en) Full optical fiber integrated optical power monitor and manufacturing method thereof
CN215180998U (en) High-power multi-core tail fiber and collimator thereof
JP2007293300A (en) Beam converting apparatus
US20060088243A1 (en) High-power fused collimator and associated methods
CN201051161Y (en) A single optical fiber calibrator
CN201616584U (en) Structure for monitoring power of fiber-coupled laser at visible light wave band
CN105759372A (en) Optic lens assembly and method thereof
CN204556887U (en) A kind of high-power fiber optical alignment coupled system
CN1323304C (en) Multi mould multi-optical fiber power coupler and its preparation method
CN203561768U (en) Optical collimator
CN214954213U (en) Integrated optical device of high-power optical isolator, WDM and beam combiner
CN212749310U (en) Hybrid device with superposed 1 x 2 single-stage isolator and WDM filter
CN103487892A (en) Polarization-maintaining pump combiner
CN210270269U (en) Wavelength division multiplexer
CN211426856U (en) Optical device structure with lens and glue on optical path
CN106324758A (en) Optical fiber loop device, manufacturing method of optical fiber loop device, optical fiber connector and manufacturing method of optical fiber connector
CN105785509B (en) A kind of optical fibre mode converter and preparation method thereof
CN103368069A (en) A laser device structure for reducing high-order mode

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CP03 Change of name, title or address

Address after: 518000 No. 35, Cuijing Road, Pingshan New District, Shenzhen, Guangdong

Patentee after: Ona Technology (Shenzhen) Group Co.,Ltd.

Address before: No.35 Cuijing Road, Pingshan District, Shenzhen City, Guangdong Province

Patentee before: O-NET COMMUNICATIONS (SHENZHEN) Ltd.

CP03 Change of name, title or address