CN208939332U - A kind of optical fiber laser - Google Patents
A kind of optical fiber laser Download PDFInfo
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- CN208939332U CN208939332U CN201821729597.3U CN201821729597U CN208939332U CN 208939332 U CN208939332 U CN 208939332U CN 201821729597 U CN201821729597 U CN 201821729597U CN 208939332 U CN208939332 U CN 208939332U
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- optical fiber
- bundling device
- fiber
- fiber grating
- signal bundling
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Abstract
The utility model relates to optical technical fields, more particularly to a kind of optical fiber laser, it includes the anti-fiber grating (101) of height, forward pumping signal bundling device (104), interacvity gain optical fiber (102), inverted pump signal bundling device (103), low anti-fiber grating (103) and the fiber output head (109) set gradually, and the forward pumping signal bundling device (104) and inverted pump signal bundling device (106) are all connected with the multiple pump light source modules (105) of setting.This optical fiber laser damage risk is lower and output power is higher.
Description
Technical field
The utility model relates to optical technical fields, more particularly to a kind of optical fiber laser.
Background technique
Optical fiber laser is widely used in field of material processing due to its brilliant performance advantage.In order to
Reflected light is reduced in process to the destructive effects of laser, in conventional optical fiber laser, generallys use monostable oscillator
Structure.
In conventional monostable oscillator structure, pump power is intracavitary by the pump combiner injection outside oscillation chamber, thus
Wavelength convert and power gain are realized, as shown in Figure 1, it includes forward pumping signal bundling device 104, the Gao Fanguang set gradually
Fine grating 101, interacvity gain optical fiber 102, low anti-fiber grating 103, inverted pump signal bundling device 106 and fiber output head
109.However, being limited to constitute the power tolerance of the fiber grating pair of oscillation chamber, the pump power of single-ended injection is only enough obtained
The power output of 750W or so is obtained, both-end pumping could obtain the power output of 1.5kW or so.But it is long under this power level
Phase work, there are higher damage risks for fiber grating.The efficiency of power amplifier is usually 5%-10% higher than monostable oscillator, still
Conventional master-oscillator power amplifier (MOPA) configuration is easy to cause system injury in the stronger situation of end face reflection.
Summary of the invention
The higher light of lower and output power the technical problem to be solved by the utility model is to provide a kind of damage risk
Fibre laser.
The technical scheme adopted by the utility model is a kind of optical fiber laser, it includes the reflective fibre of height set gradually
Grating, forward pumping signal bundling device, interacvity gain optical fiber, inverted pump signal bundling device, low anti-fiber grating and optical fiber
Export head, and the forward pumping signal bundling device and inverted pump signal bundling device are all connected with the multiple pump light source moulds of setting
Block.
Using the above structure compared with prior art, the utility model has the advantage that the application using intracavitary both-end
Forward and backward pump signal bundling device, i.e., be placed between fiber grating pair and gain fibre, such pump light is not necessarily to by pumping
By fiber grating covering, avoids coat caused by being limited because of optical fiber Bragg grating encapsulation technique and damage, and is if intracavitary
Fusing point (between fiber grating pair) is burnt, and the condition of laser starting of oscillation destroys automatically, not will form the optical fiber welding of conductibility destruction
Disconnected phenomenon, reduces loss to the greatest extent.
Preferably, the core diameter of the anti-fiber grating of height and low anti-fiber grating is all larger than interacvity gain optical fiber
Core diameter.The core diameter of fiber grating is greater than to the core diameter of gain fibre, the two passes through the cone inside bundling device
Area realizes smooth transition, on the one hand the power density inside fibre core is reduced by increasing fiber grating core diameter, to mention
High power tolerance, the core diameter of another aspect gain fibre is smaller can to guarantee higher output beam quality, the two
Between the gap of fibre core transition is carried out by the cone area inside bundling device, reduce loss of signal, while playing and filtering out high-order transverse mode
Effect.
Preferably, reversed covering power stripper is additionally provided with before the anti-fiber grating of height, the low reflective fine light
To covering power stripper before being additionally provided between grid and fiber output head.A covering power is respectively connected in rear and front end to strip
Device (CPS) is used to strip opposite remaining cladding light, to the safety of laser export head before on the one hand protecting, on the other hand protects anti-
To the safety of feux rouges instruction light.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the optical fiber laser of this prior art.
Fig. 2 is the structural schematic diagram of optical fiber laser of the present invention.
It is as shown in the figure: 101, high anti-fiber grating；102, interacvity gain optical fiber；103, low anti-fiber grating；104, forward direction
Pump signal bundling device；105, pump light source module；106, inverted pump signal bundling device；107, reversed covering power strips
Device；108, forward direction covering power stripper；109, fiber output head.
Specific embodiment
The utility model is described further below in conjunction with attached drawing and specific embodiment, but the utility model is not only
It is limited to following specific embodiments.
As shown, a kind of optical fiber laser, including reversed covering power stripper 107, the high reflective fibre set gradually
Grating 101, forward pumping signal bundling device 104, interacvity gain optical fiber 102, inverted pump signal bundling device 106, low reflective fibre
Grating 103, forward direction covering power stripper 108 and fiber output head 109, and forward pumping signal bundling device 104 and anti-
The multiple pump light source modules of setting are all connected with to pump signal bundling device, in which:
High anti-fiber grating 101, for constituting the high reflective mirror of laser resonator and selecting the central wavelength of starting of oscillation；
Interacvity gain optical fiber 102 is usually matched with fiber dimensions used in high anti-fiber grating 101；
Low anti-fiber grating 103, for constituting the low anti-mirror of laser resonator and compressing the line width of starting of oscillation light wave；
Forward pumping signal bundling device 104, it is also known as preceding to (N+1) * 1 pump combiner, for injecting the pump of fl transmission
Pu optical power, wherein N is the quantity of pumping arm, and representative value is 1 to 18；
Pump light source module 105 generallys use semiconductor laser as optical fiber for providing the pumping energy of laser
Optical fiber laser can also be used as pumping source in the pumping source of laser；
Inverted pump signal bundling device 106, also known as reversed (N+1) * 1 pump combiner, for injecting the pump of reverse transfer
Pu optical power, wherein N is the quantity of pumping arm, and representative value is 1 to 18；
Reversed covering power stripper (CPS) 107, for stripping the remnant pump light of reverse transfer and being leaked to covering
Signal light power；
Forward direction covering power stripper (CPS) 108, for stripping the remnant pump light of fl transmission and being leaked to covering
Signal light power；
Fiber output head 109 expands output for carrying out to signal laser.
And the core diameter of high anti-fiber grating 101 and low anti-fiber grating 103 is all larger than interacvity gain optical fiber 102
Core diameter.
With the prior art the difference is that: the position of forward pumping signal bundling device 104 is outer from high anti-fiber grating 101
Sidesway is directly connected with interacvity gain optical fiber 102 to inside, and forward pumping light is absorbing it by interacvity gain fiber section
Afterwards, nubbin is disposed by inverted pump signal bundling device 106, a part in inside, and a part enters pumping arm, also
It is a small amount of to enter low reflective grid, it is finally reversed covering power stripper 107 and strips；
The position of inverted pump signal bundling device 106 moves on to inside from the outside of low anti-fiber grating 103, so reversed to pass
Defeated pump light by interacvity gain fiber section after absorbing, and nubbin is by forward pumping signal bundling device 104, and one
Part is disposed in inside, and a part enters pumping arm, enters high reflective grid there are also a small amount of, finally by preceding to covering power
Stripper 108 strips.
The working principle of the application:
The pump light that forward pumping signal bundling device 104 and inverted pump signal bundling device 106 inject can be sharp simultaneously
With the pump absorption ability of gain fibre, the fiber grating pair signal light for constituting laser cavity reflects to form oscillation.Pump light is not straight
It connects through excessively high reflective fine grating 101 and low anti-fiber grating 103, reduces its workload, improve reliability.In forward direction and
It is respectively connected with 1 covering power stripper (CPS) on the outside of backward pumping bundling device, for stripping remaining cladding light, safeguards system
Safety.What fiber output head 109 was finally completed signal laser expands output.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those of skill in the art that its according to
It can so modify to technical solution documented by previous embodiment, or part of technical characteristic is replaced on an equal basis
It changes；And these are modified or replaceed, and the essence of corresponding technical solution is not made to be detached from various embodiments of the utility model technical side
The spirit and scope of case.
Claims (3)
1. a kind of optical fiber laser, it is characterised in that: it includes the anti-fiber grating (101) of height set gradually, forward pumping letter
Number bundling device (104), interacvity gain optical fiber (102), inverted pump signal bundling device (106), low anti-fiber grating (103) and
Fiber output head (109), and the forward pumping signal bundling device (104) and inverted pump signal bundling device (106) connect
Connect the multiple pump light source modules (105) of setting.
2. a kind of optical fiber laser according to claim 1, it is characterised in that: the anti-fiber grating of height (101) and
The core diameter of low anti-fiber grating (103) is all larger than the core diameter of interacvity gain optical fiber (102).
3. a kind of optical fiber laser according to claim 1, it is characterised in that: before the anti-fiber grating of height (101)
It is additionally provided with reversed covering power stripper (107), is also set between the low anti-fiber grating (103) and fiber output head (109)
To covering power stripper (108) before having.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821729597.3U CN208939332U (en) | 2018-10-25 | 2018-10-25 | A kind of optical fiber laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821729597.3U CN208939332U (en) | 2018-10-25 | 2018-10-25 | A kind of optical fiber laser |
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| Publication Number | Publication Date |
|---|---|
| CN208939332U true CN208939332U (en) | 2019-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821729597.3U Active CN208939332U (en) | 2018-10-25 | 2018-10-25 | A kind of optical fiber laser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111162436A (en) * | 2020-01-17 | 2020-05-15 | 成都翱翔拓创光电科技合伙企业(有限合伙) | Pulse fiber laser based on side pumping technology |
-
2018
- 2018-10-25 CN CN201821729597.3U patent/CN208939332U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111162436A (en) * | 2020-01-17 | 2020-05-15 | 成都翱翔拓创光电科技合伙企业(有限合伙) | Pulse fiber laser based on side pumping technology |
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