CN104332811A - Optical-fiber laser oscillation system - Google Patents
Optical-fiber laser oscillation system Download PDFInfo
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- CN104332811A CN104332811A CN201410432879.7A CN201410432879A CN104332811A CN 104332811 A CN104332811 A CN 104332811A CN 201410432879 A CN201410432879 A CN 201410432879A CN 104332811 A CN104332811 A CN 104332811A
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Abstract
The invention proposes an optical-fiber laser oscillation system which includes a laser pumping module; and an optical-fiber oscillation module coupled with the laser pumping module. The optical-fiber oscillation module includes a resonance cavity and a gain optical fiber; a cladding-layer leakage device arranged in the resonance cavity; and a laser output module which is connected with the optical-fiber oscillation module and used for outputting laser signals. The system has higher output power and efficiency and has higher output light beam quality.
Description
Technical field
The present invention relates to Fiber laser technology field, particularly relate to a kind of optical-fiber laser oscillatory system.
Background technology
Along with Fiber laser technology is growing, optical fiber fan-out capability constantly gets a promotion, and in some specific field, needs to discharge through-put power in fiber cladding.Such as at the leakage of pumping that gain afterbody carries out, and in order to improve the brightness of output, the power transmitted in covering being leaked, obtaining pure fibre core and exporting.
When in high-power application, the power tolerance of Leak artifact becomes one of restraining factors that fiber laser power upwards expands.Therefore, producing stable Laser output simultaneously, the generation of cladding light should be limited, needing cladding light to be processed to control a lower level by covering Leak artifact.
Be directed to optical-fiber laser oscillatory system, cladding light mainly comes from does not have absorbed remnant pump and because fibre core restriction ability is by local failure, and the flashlight propagated at fibre core that the factors such as welding quality cause enters covering and propagates.For remnant pump, for the fiber laser system determined (system running wavelength, fiber lengths, cost etc.), there is no the technological means of significant effective at present.
Summary of the invention
The present invention is intended to solve one of technical problem in correlation technique at least to a certain extent.
For this reason, the object of the invention is to propose the optical-fiber laser oscillatory system that a kind of structure is simple, efficiency is high.
To achieve these goals, the optical-fiber laser oscillatory system of the embodiment of the present invention, comprising: pump laser module; The fiber oscillator module be coupled with described pump laser module, described fiber oscillator module comprises resonant cavity and gain fibre; Covering Leak artifact, described covering Leak artifact is arranged in described resonant cavity; Laser output module, described Laser output module is connected with described fiber oscillator module, for Output of laser signal.
According to the optical-fiber laser oscillatory system of the embodiment of the present invention, by fiber oscillator module, the high-rder mode of the cladding light produced in system is made to leak to fiber cladding, thus diffuse in environment, while controlling cladding light energy, increase the effective power of optical-fiber laser oscillatory system, optimize the beam quality of fiber laser system.
In some instances, described resonant cavity comprises all-fiber formula resonant cavity and discrete resonant cavity.
In some instances, described all-fiber formula resonant cavity comprises the first fiber grating and the second fiber grating, described gain fibre is between described first fiber grating and the second fiber grating, described first fiber grating is coupled with described pump laser module, and described second fiber grating is connected with described Laser output module.
In some instances, described all-fiber formula resonant cavity comprises the first fiber grating and the second fiber grating, and described first fiber grating is coupled with described pump laser module, and described second fiber grating is connected with described optical fiber transmission module.
In some instances, gain fibre is between described first fiber grating and described second fiber grating.
In some instances, described covering Leak artifact is arranged on the pad of described gain fibre and described second fiber grating.
In some instances, described covering Leak artifact is arranged on the gain fibre within the first predeterminable range adjacent with described pad.
In some instances, described covering Leak artifact is arranged on the input optical fibre of described second fiber grating.
In some instances, described covering Leak artifact is arranged on the gain fibre within the second predeterminable range adjacent with described Effect of Back-Cavity Mirror.
In some instances, described discrete resonant cavity comprises front cavity mirror and Effect of Back-Cavity Mirror, and described front cavity mirror is adjacent with described pump laser module, and described Effect of Back-Cavity Mirror is adjacent with described Laser output module.
In some instances, described pump laser module is coupled with described fiber oscillator module by the mode of side pump or end pump.
In some instances, described pump laser module is coupled with described fiber oscillator module by the mode of side pump or end pump.
The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of optical-fiber laser oscillatory system according to an embodiment of the invention;
Fig. 2 is the structural representation of the optical-fiber laser oscillatory system of one embodiment of the invention; With
Fig. 3 is the structural representation of the traditional fiber laser oscillation system of one embodiment of the invention
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
Fig. 1 is the structured flowchart of optical-fiber laser oscillatory system according to an embodiment of the invention.As shown in Figure 1, the optical-fiber laser oscillatory system of the embodiment of the present invention, comprising: pump laser module 100, the fiber oscillator module 200 be coupled with pump laser module 100, covering Leak artifact 300 and Laser output module 400.
Wherein, pump laser module 100 is coupled with fiber oscillator module 200 by the mode of side pump or end pump.This coupling process can be completed by the mode of fused fiber splice or discrete component coupling.Fiber oscillator module 200 comprises resonant cavity 201 and gain fibre 202.Covering Leak artifact 300 is arranged in resonant cavity 201.Laser output module 400 is connected 200 with fiber oscillator module, for Output of laser signal.Particularly, in one embodiment of the invention, resonant cavity 210 comprises all-fiber formula resonant cavity and discrete resonant cavity.
Further, in one embodiment of the invention, all-fiber formula resonant cavity comprises the first fiber grating and the second fiber grating, and the first fiber grating is coupled with pump laser module 100, and the second fiber grating is connected with Laser output module 400.
Further, in one embodiment of the invention, gain fibre 202 is between the first fiber grating and the second fiber grating.
In one embodiment of the invention, covering Leak artifact 300 can be arranged on the pad of gain fibre 202 and the second fiber grating, also can be arranged on the gain fibre within the first predeterminable range adjacent with this pad.Wherein, in one embodiment of the invention, the first predeterminable range is 1m.Covering Leak artifact 300 can also be arranged on the input optical fibre of the second fiber grating.
In addition, in one embodiment of the invention, discrete resonant cavity comprises front cavity mirror and Effect of Back-Cavity Mirror, and wherein, front cavity mirror is adjacent with pump laser module 100, and Effect of Back-Cavity Mirror is adjacent with Laser output module 400.
Further, in one embodiment of the invention, covering Leak artifact 300 can be arranged on the gain fibre 202 within the second predeterminable range adjacent with Effect of Back-Cavity Mirror.Wherein, in one embodiment of the invention, the second predeterminable range is 1m.
As a concrete example, as shown in Figure 2, the laser diode that pump laser module 100 is exported by several band tail optical fibers is coupled into fiber oscillator module 200 through multimode fiber bundling device.Resonant cavity 201 comprises the first fiber grating A (high anti-) and the second fiber grating B (output).Gain fibre 202 is between the first fiber grating A and the second fiber grating B, and the first fiber grating A is coupled with pump laser module 100, and the second fiber grating B is connected with optical fiber transmission module 400.Wherein, optical fiber transmission module comprises Transmission Fibers 401 and exports end cap 402.Covering Leak artifact 400 is adopt certain process acts in the light Leak artifact of fiber cladding, and what adopt in an embodiment of the present invention is the mode of index matching.By configuring the higher index-matching material of refractive index 500 around fiber cladding, reach the object diffused to by the light in fiber cladding in environment.Covering Leak artifact 300 is wrapped on the pad of gain fibre 202 and the second fiber grating B.Utilize solder joint to strengthen the disturbance of high-rder mode like this, make the higher order mode of a part of critical propagation enter covering by during Leak artifact, force it to enter fiber cladding from fiber core and propagate.And through the low-order mode of covering Leak artifact for follow-up pad, the situation such as bending is insensitive, can constrains in fibre core and continue to propagate.In addition, in order to strengthen this disturbance, while configuration covering Leak artifact 300, the optical fiber of this position is carried out to the bending process of certain curvature.
For further illustrating the advantage of the system of the embodiment of the present invention, compare with the traditional fiber laser oscillation system there is cladding light leaking ability, as shown in Figure 3.This system comprises pump laser module 10, the first fiber grating (high anti-) a, gain fibre 22, covering Leak artifact 30, second fiber grating (output) b, and the optical fiber transmission module be made up of with output end cap 42 Transmission Fibers 41.
The laser diode that pump laser module 10 is exported by several band tail optical fibers is coupled into fiber oscillator module through multimode fiber bundling device, and (the first fiber grating (high anti-) a, gain fibre 22, in fiber grating (output) b.Covering Leak artifact 30 is adopt certain process acts in the light Leak artifact of fiber cladding, adopt the mode of index matching, by configuring the higher index-matching material of refractive index 50 around fiber cladding, reach the object diffused to by the light in fiber cladding in environment.Covering Leak artifact is placed in Transmission Fibers 41.
The optical-fiber laser oscillatory system (Fig. 2) of the contrast embodiment of the present invention and traditional covering leakage optical fiber laser system (Fig. 3).In injection pumping, when the conditions such as fiber lengths are identical, its advantage is: the system of the embodiment of the present invention has higher power output and efficiency, higher output beam quality, and the running power of covering Leak artifact is lower.
According to the optical-fiber laser oscillatory system of the embodiment of the present invention, by fiber oscillator module, the high-rder mode of the cladding light produced in system is made to leak to fiber cladding, thus diffuse in environment, while controlling cladding light energy, increase the effective power of optical-fiber laser oscillatory system, optimize the beam quality of fiber laser system.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (10)
1. an optical-fiber laser oscillatory system, is characterized in that, comprising:
Pump laser module;
The fiber oscillator module be coupled with described pump laser module, described fiber oscillator module comprises resonant cavity and gain fibre;
Covering Leak artifact, described covering Leak artifact is arranged in described resonant cavity;
Laser output module, described Laser output module is connected with described fiber oscillator module, for Output of laser signal.
2. system according to claim 1, is characterized in that, described resonant cavity comprises all-fiber formula resonant cavity and discrete resonant cavity.
3. system according to claim 2, it is characterized in that, described all-fiber formula resonant cavity comprises the first fiber grating and the second fiber grating, and described first fiber grating is coupled with described pump laser module, and described second fiber grating is connected with described Laser output block.
4. the system according to claim 1 or 3 any one, is characterized in that, described gain fibre is between described first fiber grating and described second fiber grating.
5. the system according to claim 3 or 4 any one, is characterized in that, described covering Leak artifact is arranged on the pad of described gain fibre and described second fiber grating.
6. the system according to claim 3 or 5 any one, is characterized in that, described covering Leak artifact is arranged on the gain fibre within the first predeterminable range adjacent with described pad.
7. system according to claim 3, is characterized in that, described covering Leak artifact is arranged on the input optical fibre of the second fiber grating.
8. system according to claim 2, is characterized in that, described discrete resonant cavity comprises front cavity mirror and Effect of Back-Cavity Mirror, and described front cavity mirror is adjacent with described pump laser module, and described Effect of Back-Cavity Mirror is adjacent with described Laser output module.
9. system according to claim 8, is characterized in that, described covering Leak artifact is arranged on the gain fibre within the second predeterminable range adjacent with described Effect of Back-Cavity Mirror.
10. system according to claim 1, is characterized in that, described pump laser module is coupled with described fiber oscillator module by the mode of side pump or end pump.
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|---|---|---|---|
| CN201410432879.7A CN104332811A (en) | 2014-08-28 | 2014-08-28 | Optical-fiber laser oscillation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410432879.7A CN104332811A (en) | 2014-08-28 | 2014-08-28 | Optical-fiber laser oscillation system |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103746278A (en) * | 2013-12-13 | 2014-04-23 | 杭州法博激光科技有限公司 | Hectowatt thulium-doped single-mode continuous all-fiber laser |
| CN203589446U (en) * | 2013-10-22 | 2014-05-07 | 长春理工大字 | Cladding light filtering device for double-clad fiber laser |
| CN203596497U (en) * | 2013-11-07 | 2014-05-14 | 北京工业大学 | Optical fiber cladding layer optical stripper used for high-power optical fiber laser |
-
2014
- 2014-08-28 CN CN201410432879.7A patent/CN104332811A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203589446U (en) * | 2013-10-22 | 2014-05-07 | 长春理工大字 | Cladding light filtering device for double-clad fiber laser |
| CN203596497U (en) * | 2013-11-07 | 2014-05-14 | 北京工业大学 | Optical fiber cladding layer optical stripper used for high-power optical fiber laser |
| CN103746278A (en) * | 2013-12-13 | 2014-04-23 | 杭州法博激光科技有限公司 | Hectowatt thulium-doped single-mode continuous all-fiber laser |
Non-Patent Citations (1)
| Title |
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| HU ZHEN-YUE ET AL.: "227-W output all-fiberized Tm-doped fiber laser at 1908 nm", 《CHIN. PHYS. B》 * |
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Application publication date: 20150204 |