CN206161897U - A feedback optical isolator for full fiber laser of high power - Google Patents
A feedback optical isolator for full fiber laser of high power Download PDFInfo
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- CN206161897U CN206161897U CN201621107033.7U CN201621107033U CN206161897U CN 206161897 U CN206161897 U CN 206161897U CN 201621107033 U CN201621107033 U CN 201621107033U CN 206161897 U CN206161897 U CN 206161897U
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Abstract
The utility model relates to a feedback optical isolator for full fiber laser of high power, because input tail optical fiber, collimating lens, the isosceles right -angle prism, focusing lens, output tail optical fiber and feedback light absorption district constitute, input optical collimator is in the same place into in input tail optical fiber and collimating lens installation, focusing lens installs with the output tail optical fiber and is in the same place into output optical collimator, the isosceles right -angle prism is placed at input optical collimator, between the output optical collimator, and the right angle of isosceles right -angle prism faces focusing lens's center, feedback light absorption district's design is faced at two right angles of isosceles right -angle prism and to be located, wholly encapsulate into feedback optical isolator. The utility model discloses very convenient access fiber laser light path, forward laser can can't harm and pass through, and reverse laser that the feedback is returned is taken away the heat through cooling system behind the wall to keeping apart by isosceles right -angle prismatic reflection, and can not follow optical fiber reflection to the fiber laser resonant cavity in.
Description
Technical field：
This utility model belongs to fiber laser technology field, for the reverse feedback light to high-power all-fiber laser
Isolated, to ensure normal work of the optical fiber laser under the conditions of high reflection.
Background technology：
Optical fiber laser is one of industrial processes laser instrument of a new generation, with small volume, lightweight, good beam quality,
The advantages of non-maintaining, energy-conserving and environment-protective, high-capacity optical fiber laser of the current power more than hundreds of watts, are widely used to metal
The fields such as the cutting of material, welding.In actual applications, it usually needs the processing such as high reflection such as aluminum, rustless steel, pyrite, red copper
Property material, a part of reflected light can cause the laser unstable or laser instrument of output to damage along original optical path return laser light resonator cavity
It is bad.To solve the problems, such as reflected light, a kind of method is to add cladding light detacher in the optical path, to being coupled into fibre cladding
Light carries out lift-off processing, but to processing in the light for being coupled into fiber core, it is impossible to fundamentally isolate reverse transfer
Feedback light；Another kind is to add unidirectional optoisolator, but current unidirectional optoisolator to be only capable of bearing the transmission work(below hectowatt
Rate.How isolation processing is carried out to the feedback light into fibre core, while more than hundreds of watts laser of positive transmission, are commercial at present high
The technical barrier faced by power fibre lasers.
The content of the invention：
This utility model is technical problem present in solution background technology, there is provided a kind of to be used for high power full optical fiber laser
The feedback optoisolator of device, the feedback light to reverse transfer are had including the feedback light for being coupled into fiber core and covering
Effect isolation, to ensure stability and reliability of the optical fiber laser when high anti-material is processed.
The technical solution of the utility model is：
For the feedback optoisolator of high-power all-fiber laser, due to being input into tail optical fiber, collimating lens, isosceles right-angled edge
Mirror, condenser lenses, output tail optical fiber and feedback light uptake zone composition, it is characterised in that：Input tail optical fiber and collimating lens are arranged on one
Input optical fibre collimator is played into, condenser lenses and output tail optical fiber are installed together into output optical fibre collimator, isosceles right-angle prism
It is placed between input optical fibre collimator, output optical fibre collimator, and the right angle of isosceles right-angle prism faces condenser lenses
Center, in two right-angle surface corresponding positions of isosceles right-angle prism, overall package is into feedback optoisolator for the design of feedback light uptake zone.
Described input tail optical fiber and output tail optical fiber are double clad Transmission Fibers, and the pure quartz crystal of one section of the equal welding of end face is made
For end caps and laser anti-reflection film is plated, for transmitting high power laser light.
When described isosceles right-angle prism is placed, isosceles right-angle prism heart axis and the collimation Jing after input optical fibre collimator
The axial direction of beam center axis coincides, and inclined-plane plating laser anti-reflection film, two right-angle surfaces plate laser highly reflecting films.
This utility model very easily incoming fiber optic laser light path, positive laser lossless can pass through, and what is fed back is anti-
Reflexed to by isosceles right-angle prism to laser and heat is taken away by cooling system after isolator wall, without along fiber reflection extremely
In resonant cavity of fibre-optical laser.
Description of the drawings：
Fig. 1 is structural representation of the present utility model.
Fig. 2 is specifically used schematic diagram of the present utility model.
Specific embodiment：
Structure Figure is further described to invention.
As shown in figure 1, for the feedback optoisolator of high-power all-fiber laser, due to being input into tail optical fiber 1, collimating lens
2nd, isosceles right-angle prism 3, condenser lenses 4, output tail optical fiber 5 and feedback light uptake zone 6 are constituted, it is characterised in that：Input 1 He of tail optical fiber
Collimating lens 2 are installed together into input optical fibre collimator, and condenser lenses 4 and output tail optical fiber 5 are installed together into output optical fibre
Collimator, isosceles right-angle prism 3 are placed between input optical fibre collimator, output optical fibre collimator, and isosceles right-angle prism 3
Right angle faces the center of condenser lenses 4, and feedback light uptake zone 6 is designed in two right-angle surface corresponding positions of isosceles right-angle prism 3,
Overall package is into feedback optoisolator 10.
Described input tail optical fiber 1 and output tail optical fiber 5 are double clad Transmission Fibers, end face one section of pure quartz crystal of equal welding
As end caps and laser anti-reflection film is plated, for transmitting high power laser light.
When described isosceles right-angle prism 3 is placed, 3 heart axis of isosceles right-angle prism and the standard Jing after input optical fibre collimator
The axial direction of direct light central beam axis coincides, and inclined-plane plating laser anti-reflection film, two right-angle surfaces plate laser highly reflecting films.
By taking typical high-capacity optical fiber laser as an example.As shown in Fig. 2 the pumping semiconductor laser 201 with tail optical fiber is molten
The fiber grating 202 that is all-trans is connected to, the fiber grating that is all-trans is fused to gain fibre 203, gain fibre 203 is fused to output coupling light
Grid 204, output coupling grating 204 and input 205 phase welding of tail optical fiber of the present utility model, are input into tail optical fiber end face one section of pure stone of welding
English crystal is as end caps and plates laser anti-reflection film, the laser Jing input tail optical fibers 205 produced by gain fibre and collimating lens
206 one collimated laser beams of formation pass through along 207 optical axis of isosceles right-angle prism is lossless, and subsequent line focus lens 208 are coupled into
Output tail optical fiber 209, output tail optical fiber 209 and the 211 phase welding of laser output system, laser beam are realized by laser output system 211
Output.When there is feedback light to return along laser output system 211, feedback light first passes around output tail optical fiber 209, and line focus lens
Directive isosceles right-angle prism 207 after 208 collimations, the feedback light of the reverse transfer transmitted due to Jing coverings and fibre core have larger
The angle of divergence, will be incident in two right-angle surfaces of isosceles right-angle prism 207, then be reflected onto feedback optoisolator 20 both sides it is anti-
Feedback light absorbs area 210, then heat is taken away by cooling system.Therefore, feedback light can be effectively isolated, without entering laser
Resonance intracavity.
Claims (3)
1. it is used for the feedback optoisolator of high-power all-fiber laser, including input tail optical fiber (1), collimating lens (2), isosceles is straight
Angle prism (3), condenser lenses (4), output tail optical fiber (5) and feedback light uptake zone (6), it is characterised in that：Input tail optical fiber (1) and standard
Straight lens (2) are installed together into input optical fibre collimator, and condenser lenses (4) and output tail optical fiber (5) are installed together into output
Optical fiber collimator, isosceles right-angle prism (3) are placed between input optical fibre collimator, output optical fibre collimator, and isosceles right angle
The right angle of prism (3) faces the center of condenser lenses (4), and feedback light uptake zone (6) are designed the two of isosceles right-angle prism (3)
Individual right-angle surface corresponding position, overall package is into feedback optoisolator (10).
2. the feedback optoisolator of high-power all-fiber laser is used for according to claim 1, it is characterised in that：Described
Input tail optical fiber (1) and output tail optical fiber (5) are double clad Transmission Fibers, and end face one section of pure quartz crystal of equal welding is used as optical fiber end
Cap simultaneously plates laser anti-reflection film.
3. the feedback optoisolator of high-power all-fiber laser is used for according to claim 1, it is characterised in that：Described
Isosceles right-angle prism (3), during placement, its center axis are coincided with the collimated beam central axis Jing after input optical fibre collimator,
Inclined-plane plates laser anti-reflection film, and two right-angle surfaces plate laser highly reflecting films.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621107033.7U CN206161897U (en) | 2016-10-09 | 2016-10-09 | A feedback optical isolator for full fiber laser of high power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621107033.7U CN206161897U (en) | 2016-10-09 | 2016-10-09 | A feedback optical isolator for full fiber laser of high power |
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| Publication Number | Publication Date |
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| CN206161897U true CN206161897U (en) | 2017-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621107033.7U Active CN206161897U (en) | 2016-10-09 | 2016-10-09 | A feedback optical isolator for full fiber laser of high power |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106443887A (en) * | 2016-10-09 | 2017-02-22 | 武汉锐科光纤激光技术股份有限公司 | Feedback optical isolator for high power all-fiber laser |
-
2016
- 2016-10-09 CN CN201621107033.7U patent/CN206161897U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106443887A (en) * | 2016-10-09 | 2017-02-22 | 武汉锐科光纤激光技术股份有限公司 | Feedback optical isolator for high power all-fiber laser |
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