CN207217990U - Middle infrared pulsed lasers - Google Patents
Middle infrared pulsed lasers Download PDFInfo
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- CN207217990U CN207217990U CN201721232768.7U CN201721232768U CN207217990U CN 207217990 U CN207217990 U CN 207217990U CN 201721232768 U CN201721232768 U CN 201721232768U CN 207217990 U CN207217990 U CN 207217990U
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Abstract
The utility model discloses a kind of middle infrared pulsed lasers, including THETA resonators, by building the structure design of circular cavity, irreversible loss is introduced in the feedback of reverse-s shape, one-way transmission of the laser in intracavitary can be realized, realizes that the micron waveband laser of high power 3 exports；By introducing the fluoride micro-nano fiber type passive modulation device of different parameters in main ring, the 3 micron waveband laser output of length/short/ultrashort pulse is realized.
Description
Technical field
The utility model belongs to laser technology field, and in particular to a kind of optical fiber laser.
Background technology
Optical fiber laser (Fiber Laser) refers to use doped rare earth element (Nd3+, Er3+, Yb3+, Tm3+ etc.) glass light
The fine laser as gain media, optical fiber laser can develop on the basis of fiber amplifier：In the work of pump light
With high power density is easily formed in lower optical fiber, the laser levels " population inversion " of working-laser material are caused, are added when appropriate
Laser generation output can be formed by entering positive feedback loop (composition resonator), compared to conventional laser, have light phototranstormation efficiency
The advantage such as height, good beam quality, excellent heat radiation performance, simple and compact for structure.
Optical fiber laser application is very extensive, including laser fiber communication, laser space remote communication, industry are made
Ship, automobile making, laser engraving laser marking laser cutting, printing roller processed, metal and nonmetal drilling/cutting/welding (brazing,
Hardening, covering and depth welding), military and national defense safety, medicine equipment instrument and equipment, large foundation construction, as its separate excitation
Pumping source of light device etc., and it is operated in the optical fiber laser of middle infrared band in biologic medical, gas sensing, national defence all
With potential application value.Terres rares doped fiber laser.
It is the structural representation that existing all -fiber mixes Er3+ fluoride fiber lasers as shown in Figure 1, laser pump source
Using 980nm semiconductor laser, laser resonant cavity is by a pair of fiber grating (HR-FBG being scribed on fluoride fiber
And LR-FBG) and mix Er3+ fluoride gain medias (Er：FGF) form.
Existing all -fiber mixes Er3+ fluoride fiber lasers and is primarily present following shortcoming：
1st, system cost height is caused as laser resonant cavity using a pair of fiber gratings being scribed on fluoride fiber
It is high；
2nd, using traditional linear cavity configuration so that the extension of function of system is poor, it is difficult to improved by simple structure
Stable length/short/ultra-short pulse laser output is realized, reduces the flexibility of system.
Utility model content
To solve above mentioned problem existing for prior art, the utility model proposes a kind of middle infrared pulsed lasers.
Concrete technical scheme of the present utility model is：A kind of middle infrared pulsed lasers, the first fluoride fiber coupler,
Second fluoride fiber coupler, gain module, fluoride output coupler and passive modulation device；
The gain module first end is connected with the first fluoride fiber coupler first end tail optical fiber；The gain module
Two ends are connected with the second fluoride fiber coupler first end tail optical fiber；The fluoride output coupler first end and the first fluorination
The tail optical fiber connection of the second end of thing fiber coupler；The end of fluoride output coupler second and the second fluoride fiber coupler the
Two end tail optical fiber connections；First fluoride fiber coupler, second end connects with the second fluoride fiber coupler first end tail optical fiber
It is connected to circle centre position and forms reverse-s shape feedback；Output end of the fluoride output coupler first end as optical fiber laser；It is described passive
Modulation device is connected between gain module and the first fluoride fiber coupler.
Further, in addition to：First fluoride optical terminus and the second fluoride optical terminus, the first fluoride optical terminus connect
Connect the first fluoride fiber coupler first end tail optical fiber；Second fluoride optical terminus connects the second fluoride fiber coupler second
Hold tail optical fiber.
Further, the gain module is er-doped fluoride fiber, produces 3 micron waveband laser.
Further, the first fluoride fiber coupler and the second fluoride fiber coupler are that 2*2 is fluorinated object light
Fine coupler.
Further, the passive modulation device is made up of fluoride micro-nano fiber and material saturable absorber.
The beneficial effects of the utility model are：The outer laser of red pulse in of the present utility model, outside fluorine removal compound coupler,
Any price high fluoride fiber grating and isolator need not be introduced, only by structure circular cavity structure design,
Irreversible loss is introduced in the feedback of reverse-s shape, one-way transmission of the laser in intracavitary can be realized, realizes 3 microns of high power
Wave band of laser exports；Its is simple in construction, and cost is cheap, it is easy to accomplish；By being coupled in gain module with the first fluoride fiber
Monofluoride micro-nano fiber type passive modulation device is connected between device, middle infrared pulsed lasers is obtained, realizes that infrared pulse swashs
The output of light, and the performance parameter of adjustable fluoride micro-nano fiber type passive modulation device, with export it is different types of in
Pulsed infrared laser.
Brief description of the drawings
Fig. 1 is the structural representation of existing laser；
Fig. 2 is the mid-infrared laser device structural representation of utility model embodiment；
Fig. 3 is the mid-infrared laser device working condition one of the utility model embodiment；
Fig. 4 is the working condition two of the mid-infrared laser device of the utility model embodiment；
Fig. 5 is the working condition three of the mid-infrared laser device of the utility model embodiment；
Fig. 6 is the middle infrared pulsed lasers structural representation of the utility model embodiment；
Description of reference numerals：1 is gain module, and 2 be the first fluoride fiber coupler, and 3 be the first fluoride optical terminus,
4 be the second fluoride fiber coupler, and 5 be the second fluoride optical terminus, and 6 be fluoride output coupler, and 7 be 2 to be connected with 4
Fusion point, 8 be the equivalent gain module of resonator, and 9 be the loss module of resonator, and 10 be the first original state laser propagation
Direction, 11 be second of original state laser propagation direction, and 12 be the third original state laser propagation direction, and 13 be the 4th kind
Original state laser propagation direction, 14 be fluoride micro-nano fiber type passive modulation device, and 15 be 14 and 1 fusion point being connected,
16 be 14 and 2 fusion points being connected.
Embodiment
The technical solution of the utility model is further illustrated below in conjunction with the accompanying drawings.
The mid-infrared laser device structural representation of the utility model embodiment, including THETA resonators are illustrated in figure 2,
The THETA resonators are in annular shape；Specifically include：First fluoride fiber coupler 2, the second fluoride fiber coupler 4,
Amplifying unit 1 and fluoride output coupler 6；
The first end of amplifying unit 1 is connected with the first end tail optical fiber of the first fluoride fiber coupler 2；The amplifying unit
1 second end is connected with the first end tail optical fiber of the second fluoride fiber coupler 4；The first end of fluoride output coupler 6 and the
The end tail optical fiber connection of monofluoride fiber coupler 2 second；The end of fluoride output coupler 6 second and the second fluoride fiber
The end tail optical fiber connection of coupler 4 second；The end of first fluoride fiber coupler 2 second and the second fluoride fiber coupler 4
First end tail optical fiber is connected to circle centre position and forms S-shaped feedback；Output of the first end of fluoride output coupler 6 as optical fiber laser
End, for by caused by intracavitary outside 3 micron waveband laser output cavities.
First fluoride fiber coupler 2 and the second fluoride fiber coupler 4 are high-power 2*2 fluoride fibers coupling
Clutch, its coupling ratio can change according to the actual requirements.Fluoride optical terminus 3 and 5, for the remnant pump in absorbing cavity and production
3 raw micron waveband laser.
Said system, outside fluorine removal compound coupler, without introducing the high fluoride fiber grating of any price and isolation
Device, only by the circular cavity structure design shown in structure Fig. 2, irreversible loss, Bian Keshi are introduced in the feedback of S-shaped
Show one-way transmission of the laser in intracavitary, realize that the micron waveband laser of high power 3 exports.The work of laser of the present utility model is former
Reason is as follows：Fig. 3, Fig. 4, Fig. 5 are the simplification structure of the laser.
When just opening pump light, there is the laser of four kinds of initial transmission states in the laser：The first is 10 institute in Fig. 3
Show, along the main ring counter clockwise direction (i.e. 2 → gain module of fluoride fiber coupler 1 → the of fluoride output coupler 6 → the first
The order of difluoride 4 → fluoride of fiber coupler output coupler 6) propagate laser；It is for second in Fig. 3 shown in 11,
Along main ring clockwise direction (the i.e. fluoride fiber coupling of first fluoride fiber 2 → fluoride of coupler output coupler 6 → the second
The order of the fluoride fiber coupler 2 of 4 → gain module of clutch 1 → the first) propagate laser；The third is in Fig. 4 shown in 12,
Along main ring (the fluoride fiber coupler 2 of second fluoride fiber 4 → fluoride of coupler output coupler 6 → the first clockwise
The order of → gain module 1) light propagated is converted into (the i.e. fluoride of gain module 1 → the first counterclockwise by the feedback of reverse-s shape
The order of the fluoride fiber coupler 4 of 2 → fluoride fiber of fiber coupler fusion point 7 → the second) propagate laser；4th kind
For as shown in Fig. 5 13, along main ring, (i.e. 2 → the fluoride of fluoride fiber coupler of gain module 1 → the first exports coupling clockwise
The order of the fluoride fiber coupler 4 of clutch 6 → the second) propagate light by the feedback of reverse-s shape be converted into counterclockwise (i.e. second
The order of the 2 → gain module of fluoride fiber coupler 1 of fluoride fiber 4 → fluoride fiber of coupler fusion point 7 → the first)
The laser of propagation.As laser works tend to stable state, the laser of second of state extinguishes in the presence of irreversible loss, most
Whole laser only exists the laser along main ring counterclockwise transmission, realizes Unidirectional.
In the utility model, the gain module 1 can also use in addition to er-doped fluoride fiber and mix holmium fluoride fiber
The helix of composition or the helix formed using dysprosium fluoride fiber is mixed, within the scope of protection of the utility model.
In addition, the system can also carry out flexible structure change, it is micro- by the fluoride that different parameters are introduced in main ring
Nano fiber type passive modulation device, realize the 3 micron waveband laser output of length/short/ultrashort pulse.It is illustrated in figure 6 the application
A kind of middle infrared pulsed lasers structural representation, based on the mid-infrared laser device in Fig. 2, by by THETA cavity configurations with
Fluoride micro-nano fiber type passive modulation device is combined, and obtains middle infrared pulsed lasers；Specially：In the He of gain module 1
Fluoride micro-nano fiber type passive modulation device 14 is added between first fluoride fiber coupler 2；Fluoride micro-nano fiber
The connected mode of type passive modulation device 14 and the fluoride fiber coupler 2 of gain module 1 and first is welding；15,16 difference
Represent two fusion points with the fluoride fiber coupler 2 of gain module 1 and first；Obtained continuously in infrared pulsed lasers
After 3 micron waveband laser, under the saturable absorption effect of fluoride micro-nano fiber type passive modulation device, it will produce and adjust Q
Or Mode-locked laser and exported from fluoride output coupler 6.
Fluoride micro-nano fiber type passive modulation device 14 is made up of fluoride micro-nano fiber and material saturable absorber,
The three-dimensional material of the two-dimensional material and Cadmium arsenide etc. such as graphene, topological insulator and black phosphorus may be selected in material saturable absorber
Material.
And the species (3 micron waveband laser of length/short/ultrashort pulse) of pulse laser and specific parameter are micro- by fluoride
The performance parameter of nano fiber type passive modulation device 14；Performance parameter is such as：Modulation depth, saturation light intensity, insertion loss etc.；Therefore
The performance parameter of device 14 can be rationally designed according to the actual requirements.
One of ordinary skill in the art will be appreciated that embodiment described here is to aid in reader and understands this reality
With new principle, it should be understood that the scope of protection of the utility model is not limited to such especially statement and embodiment.
One of ordinary skill in the art can these technical inspirations according to disclosed in the utility model make and various do not depart from this practicality
New substantive other various specific deformations and combination, these deformations and combination are still in the scope of protection of the utility model.
Claims (5)
1. infrared pulsed lasers in, including THETA resonators, the THETA resonators are in annular shape；Characterized in that, tool
Body includes：First fluoride fiber coupler, the second fluoride fiber coupler, gain module, fluoride output coupler with
And passive modulation device；
The gain module first end is connected with the first fluoride fiber coupler first end tail optical fiber；The end of gain module second
It is connected with the second fluoride fiber coupler first end tail optical fiber；The fluoride output coupler first end and the first fluorination object light
The tail optical fiber connection of fine the second end of coupler；The end of fluoride output coupler second and second the second end of fluoride fiber coupler
Tail optical fiber connects；First fluoride fiber coupler, second end is connected to the second fluoride fiber coupler first end tail optical fiber
Circle centre position forms reverse-s shape feedback；Output end of the fluoride output coupler first end as optical fiber laser；The passive modulation
Device is connected between gain module and the first fluoride fiber coupler.
2. middle infrared pulsed lasers according to claim 1, it is characterised in that also include：First fluoride optical terminus
With the second fluoride optical terminus, the first fluoride optical terminus connects the first fluoride fiber coupler first end tail optical fiber；Second fluorine
Compound optical terminus connects second the second end of fluoride fiber coupler tail optical fiber.
3. middle infrared pulsed lasers according to claim 2, it is characterised in that the gain module is er-doped fluoride
Optical fiber, produce 3 micron waveband laser.
4. middle infrared pulsed lasers according to claim 3, it is characterised in that the first fluoride fiber coupler
It is 2*2 fluoride fiber couplers with the second fluoride fiber coupler.
5. middle infrared pulsed lasers according to claim 1, it is characterised in that the passive modulation device is by fluoride
Micro-nano fiber and material saturable absorber are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721232768.7U CN207217990U (en) | 2017-09-25 | 2017-09-25 | Middle infrared pulsed lasers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721232768.7U CN207217990U (en) | 2017-09-25 | 2017-09-25 | Middle infrared pulsed lasers |
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| CN207217990U true CN207217990U (en) | 2018-04-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107508125A (en) * | 2017-09-25 | 2017-12-22 | 成都光博创科技有限公司 | Middle infrared pulsed lasers |
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- 2017-09-25 CN CN201721232768.7U patent/CN207217990U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107508125A (en) * | 2017-09-25 | 2017-12-22 | 成都光博创科技有限公司 | Middle infrared pulsed lasers |
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