CN108267819A - A kind of method for improving high power pulsed laser optical coupling efficiency - Google Patents
A kind of method for improving high power pulsed laser optical coupling efficiency Download PDFInfo
- Publication number
- CN108267819A CN108267819A CN201810048929.XA CN201810048929A CN108267819A CN 108267819 A CN108267819 A CN 108267819A CN 201810048929 A CN201810048929 A CN 201810048929A CN 108267819 A CN108267819 A CN 108267819A
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- China
- Prior art keywords
- laser
- optical fiber
- core
- fiber
- optical fibers
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/421—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical component consisting of a short length of fibre, e.g. fibre stub
Abstract
The invention discloses a kind of methods for improving high power pulsed laser optical coupling efficiency, include the following steps：The first step：Optical fiber selects.Second step：Optical fiber draws cone.Third walks：Optical fiber connects.4th step：Lens Coupling.The present invention is due to using receptor of the large core fiber as space laser, receiving laser area bigger, can effectively reduce the laser energy density of receiving surface, so as to couple higher laser energy；After laser is by large core fiber, compared to the direct-coupled mode in laser space, laser dimensional energy distribution is homogenized, and end face loss can be effectively reduced when being coupled into small core optical fibers, improves Coupled Threshold；Large and small core optical fibers are attached by optical fiber connector, can easily realize alignment.Small core optical fibers can be replaced as expendable part simultaneously, can avoid replacing entire light path when damaging.
Description
Technical field
The present invention relates to a kind of methods for improving laser efficiency of transmission, and in particular to a kind of raising high power pulsed laser light
The method of fine coupling efficiency, belongs to laser technology field.
Background technology
The interaction the relevant technologies of laser and substance are multiple in the ignition and detonation etc. of micro Process, micro shaping, energetic material
Industry is widely used, and especially pulsed high power laser light may act on object in moment (time scale of the even more small magnitudes of ns)
Matter surface, therefore the function and effect under transient state can be obtained.The related experiment light path of high power laser light is usually placed in freedom at present
Space, but this light path layout mode band sample alignment difficulty is high, air environment influences big, easily burn human body, space utilization
The low problem of rate, and the above problem can effectively avoid to transmit laser by optical fiber.However for high power laser light, if used
Optical fiber is directly coupled, more than GW/cm2Laser power density fiber optic materials is made to be difficult to bear, especially in fiber coupling
The plane of incidence, optical fiber often ablated destruction, can not effectively transmit laser energy.
Cause optical fiber can not efficient coupling high power laser light the reason of in addition to optical fiber material in itself, technique and surface
Outside situations such as finish, the inhomogeneities of the laser energy of free space transmission in itself causes the excessively high energy density in part,
Optical fiber can be caused to damage.If it and is directly coupled using the optical fiber of small core diameter, the focusing power (focal spot focused on of laser
Size) and with being aligned for optical fiber very big difficulty is also brought along, cause to be difficult to directly to carry out direct-coupling using the optical fiber of small core diameter
High power pulse laser.
Invention content
The defects of it is an object of the invention to overcome the prior art, provides a kind of raising high power pulsed laser fiber coupling
The method of efficiency, the energy transmission of the first order is used as by large core fiber, and then is coupled into small core optical fibers, can effectively be carried
The coupling efficiency and threshold value of high optical fiber.
The invention is realized in this way：
A kind of method for improving high power pulsed laser optical coupling efficiency, includes the following steps：
The first step：Optical fiber selects.According to the core diameter (diameter of fiber core) of small core optical fibers be standard, the big core of selection
The core diameter of diameter optical fiber is no more than the core diameter of 2 times of small core optical fibers；
Second step：Optical fiber draws cone.Drawing cone is carried out to large core fiber, the tail end diameter of cone is drawn to should be less than small core optical fibers
Core diameter prevents laser energy leakage from energy loss and optical fiber being caused to damage.Preferably meet (r1-r2)/L when drawing cone<0.01 is advisable.
Wherein r1 is outside diameter, and r2 is end diameter, and L is the length for drawing wimble fraction, their unit is identical.
Third walks：Optical fiber connects.Large core fiber, small core optical fibers are attached by connector, are needed between the two
The gap of 0.1mm is stayed, prevents phase mutual friction from causing facet damage.
4th step：Lens Coupling.By laser by lens focus, it is coupled into large core fiber.The hot spot face of focusing
Product should be not more than the incidence end area of large core fiber, while be ensured to be vertical incidence during incidence, can effectively improve coupling efficiency.
5th step：Optical fiber is replaced.Part test can directly contribute small core optical fibers damage.The invention can be directly by small core diameter
Optical fiber is extracted, and replaces new optical fiber.
By the present invention in that by the use of large core fiber as the energy transmission of the first order.Relative to small core optical fibers, big core diameter
Optical fiber can effectively reduce energy density during optical fiber incidence, so as to which acceptable higher energy is coupled into optical fiber.Simultaneously by big
Core optical fibers achieve the effect that homogenize laser energy, improve Coupled Threshold.
It is of the invention by big core for laser energy is made more efficient to be coupled into small core optical fibers after large core fiber transmission
Diameter fiber exit end, which is done, draws cone processing, realizes effective diminution of laser facula area.Hot spot core diameter after diminution should be less than second
The core diameter of the small core optical fibers of grade.
The present invention realizes the connection of size core optical fibers by optical fiber connector, so as to easily realize optical fiber and optical fiber
Between positioning, avoid laser facula exceed optical fiber core diameter range.
The advantage of the invention is that：
(1) present invention is due to using receptor of the large core fiber as space laser, receiving laser area bigger, can have
Effect reduces the laser energy density of receiving surface, so as to couple higher laser energy；
(2) after laser is by large core fiber, compared to the direct-coupled mode in laser space, laser dimensional energy point
Cloth is homogenized, and end face loss can be effectively reduced when being coupled into small core optical fibers, improves Coupled Threshold；
(3) large and small new diameter optical fiber is attached by optical fiber connector, can easily realize alignment.Small core diameter simultaneously
Optical fiber can be replaced as expendable part, can avoid replacing entire light path when damaging.
Description of the drawings
Fig. 1 is overall work principle schematic of the present invention.
Specific embodiment
A kind of method for improving high power pulsed laser optical coupling efficiency, includes the following steps：
The first step：Optical fiber selects.The parameter of optical fiber 1 is selected based on optical fiber 2 and draws the requirement of cone.The core of optical fiber 1
Diameter control is advisable within 2 times of 2 core diameter of optical fiber, and no it will cause drawing, the part of cone is long, and difficulty of processing is big.
Second step：Optical fiber draws cone.Optical fiber 1 draws the tail end diameter of cone to should be less than the core diameter of optical fiber 2, prevents laser energy from revealing
Energy loss and optical fiber is caused to damage.Preferably meet (r1-r2)/L when drawing cone<0.01 is advisable.Wherein r1 is outside diameter, and r2 is
End diameter, L are the length for drawing wimble fraction, and unit is identical.
Third walks：Optical fiber connects.Optical fiber 1, optical fiber 2 are attached by the connector of customization, need to stay between the two
The gap of 0.1mm prevents phase mutual friction from causing facet damage.
Common optical fiber connector is primarily adapted for use in the connection of flat-top optical fiber, and the present invention has been drawn due to large core fiber tail end
Cone, it is therefore desirable to one end of optical fiber connector is processed as with drawing the matched insertion hole of cone section cone angle, it is small with the other end to ensure
The concentricity of core optical fibers.
4th step：Lens Coupling.By laser by lens focus, it is coupled into optical fiber 1.The facula area of focusing should not
More than the incidence end area of optical fiber 1, while vertical incidence is ensured to be during incidence, coupling efficiency can be effectively improved.
5th step：Optical fiber is replaced.Part test can directly contribute optical fiber 2 and damage.The invention can directly extract optical fiber 2,
Replace new optical fiber.
Although reference be made herein to invention has been described for explanatory embodiment of the invention, and above-described embodiment is only this hair
Bright preferable embodiment, embodiments of the present invention are simultaneously not restricted to the described embodiments, it should be appreciated that people in the art
Member can be designed that a lot of other modifications and embodiment, these modifications and embodiment will be fallen in principle disclosed in the present application
Within scope and spirit.
Claims (3)
- A kind of 1. method for improving high power pulsed laser optical coupling efficiency, it is characterised in that include the following steps：The first step：Optical fiber selects：Using the core diameter of small core optical fibers as standard, the core diameter of the large core fiber of selection is no more than 2 times The core diameter of small core optical fibers；Second step：Optical fiber draws cone：Drawing cone is carried out to large core fiber, the tail end diameter of cone is drawn to be less than the core diameter of small core optical fibers, Prevent laser energy leakage from energy loss and optical fiber being caused to damage；Third walks：Optical fiber connects：Large core fiber, small core optical fibers are attached by connector, stay 0.1mm between the two Gap, prevent phase mutual friction from causing facet damage.4th step：Lens Coupling：By laser by lens focus, it is coupled into large core fiber, the facula area of focusing should No more than the incidence end area of large core fiber, while vertical incidence is ensured to be during incidence, effectively improves coupling efficiency.
- 2. the method for high power pulsed laser optical coupling efficiency is improved according to claim 1, it is characterised in that：It further includes：5th step：Optical fiber is replaced：Directly small core optical fibers are extracted, replace new small core optical fibers.
- 3. the method for high power pulsed laser optical coupling efficiency is improved according to claim 1, it is characterised in that：Meet (r1-r2)/L when drawing cone<0.01, wherein r1 are outside diameter, and r2 is end diameter, and L is the length for drawing wimble fraction, Their unit is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810048929.XA CN108267819A (en) | 2018-01-18 | 2018-01-18 | A kind of method for improving high power pulsed laser optical coupling efficiency |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810048929.XA CN108267819A (en) | 2018-01-18 | 2018-01-18 | A kind of method for improving high power pulsed laser optical coupling efficiency |
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| CN108267819A true CN108267819A (en) | 2018-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810048929.XA Pending CN108267819A (en) | 2018-01-18 | 2018-01-18 | A kind of method for improving high power pulsed laser optical coupling efficiency |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111061019A (en) * | 2019-12-02 | 2020-04-24 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN113050238A (en) * | 2021-02-04 | 2021-06-29 | 武汉英飞光创科技有限公司 | Optical module coupling method |
| CN113116516A (en) * | 2021-04-01 | 2021-07-16 | 广州迪光医学科技有限公司 | Laser coupling device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1584647A (en) * | 2004-05-25 | 2005-02-23 | 长春理工大学 | Hollow circular truncated cone laser optical fibre coupler |
| CN201017078Y (en) * | 2007-03-17 | 2008-02-06 | 中国工程物理研究院电子工程研究所 | High power laser injection fiber coupling device |
| CN101241209A (en) * | 2007-12-18 | 2008-08-13 | 中国工程物理研究院电子工程研究所 | Hollow light guiding cone coupling vacuum transmission laser device |
| CN102508335A (en) * | 2011-11-11 | 2012-06-20 | 烽火通信科技股份有限公司 | Optical taper type high-power coupler and manufacturing method thereof |
| CN206684346U (en) * | 2016-12-30 | 2017-11-28 | 华星光通科技股份有限公司 | Optical communication module for improving light coupling efficiency |
-
2018
- 2018-01-18 CN CN201810048929.XA patent/CN108267819A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1584647A (en) * | 2004-05-25 | 2005-02-23 | 长春理工大学 | Hollow circular truncated cone laser optical fibre coupler |
| CN201017078Y (en) * | 2007-03-17 | 2008-02-06 | 中国工程物理研究院电子工程研究所 | High power laser injection fiber coupling device |
| CN101241209A (en) * | 2007-12-18 | 2008-08-13 | 中国工程物理研究院电子工程研究所 | Hollow light guiding cone coupling vacuum transmission laser device |
| CN102508335A (en) * | 2011-11-11 | 2012-06-20 | 烽火通信科技股份有限公司 | Optical taper type high-power coupler and manufacturing method thereof |
| CN206684346U (en) * | 2016-12-30 | 2017-11-28 | 华星光通科技股份有限公司 | Optical communication module for improving light coupling efficiency |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111061019A (en) * | 2019-12-02 | 2020-04-24 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN113050238A (en) * | 2021-02-04 | 2021-06-29 | 武汉英飞光创科技有限公司 | Optical module coupling method |
| CN113116516A (en) * | 2021-04-01 | 2021-07-16 | 广州迪光医学科技有限公司 | Laser coupling device |
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Application publication date: 20180710 |