CN106684681A - Single-end pump near and middle infrared dual-band optical fiber laser and stable output method - Google Patents
Single-end pump near and middle infrared dual-band optical fiber laser and stable output method Download PDFInfo
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- CN106684681A CN106684681A CN201710177831.XA CN201710177831A CN106684681A CN 106684681 A CN106684681 A CN 106684681A CN 201710177831 A CN201710177831 A CN 201710177831A CN 106684681 A CN106684681 A CN 106684681A
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims abstract description 38
- 230000008878 coupling Effects 0.000 claims abstract description 15
- 238000010168 coupling process Methods 0.000 claims abstract description 15
- 238000005859 coupling reaction Methods 0.000 claims abstract description 15
- 239000004065 semiconductor Substances 0.000 claims abstract description 13
- 239000000835 fiber Substances 0.000 claims description 56
- 238000005086 pumping Methods 0.000 claims description 34
- 210000004899 c-terminal region Anatomy 0.000 claims description 12
- 230000003287 optical effect Effects 0.000 claims description 8
- 238000007747 plating Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 6
- 229910052732 germanium Inorganic materials 0.000 claims description 5
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000013078 crystal Substances 0.000 claims description 2
- 238000009738 saturating Methods 0.000 claims description 2
- 239000012528 membrane Substances 0.000 claims 1
- 238000004891 communication Methods 0.000 abstract description 3
- 230000010355 oscillation Effects 0.000 description 6
- 230000007704 transition Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005283 ground state Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- IXSZQYVWNJNRAL-UHFFFAOYSA-N etoxazole Chemical group CCOC1=CC(C(C)(C)C)=CC=C1C1N=C(C=2C(=CC=CC=2F)F)OC1 IXSZQYVWNJNRAL-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000023597 hemostasis Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- QGJSAGBHFTXOTM-UHFFFAOYSA-K trifluoroerbium Chemical compound F[Er](F)F QGJSAGBHFTXOTM-UHFFFAOYSA-K 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06729—Peculiar transverse fibre profile
- H01S3/06733—Fibre having more than one cladding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06716—Fibre compositions or doping with active elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/081—Construction or shape of optical resonators or components thereof comprising three or more reflectors
- H01S3/0813—Configuration of resonator
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
Disclosed are a single-end pump near and middle infrared dual-band optical fiber laser and a stable output method. The invention belongs to the technical field of near and middle infrared laser. In order to solve the problem of complicated structures in the prior art, an optical fiber coupling output semi-conductor laser pump source outputs continuous pump light, the pump light is focused by a coupling lens assembly and after reflected by a first reflecting mirror, enters double-clad erbium-doped fluoride optical fiber, the pump light incides from the C end of the double-clad erbium-doped fluoride optical fiber, the laser oscillates both in a first resonant cavity and a second resonant cavity separately and two near and middle infrared band lasers outputted by the first reflecting mirror are generated; a delayer is installed on an outputted laser axis and the delayer is controlled by a controller, a preliminary unstable power part of a laser beam is filtered and removed and the laser beam with stable power is obtained; the single-end pump near and middle infrared dual-band optical fiber laser can be applied to the fields including laser medical treatment, electro-optical countermeasure, laser communication and space exploration and the like.
Description
Technical field
The present invention relates to Near-infrared Double wave band optical fiber laser and stable output intent in a kind of single pumping, near red in belonging to
Outer laser technology field.
Background technology
Water respectively has an absworption peak at 2.8 μm and 1.6 mu m wavebands, the laser of 2.8 mum wavelengths can accurately be cut and
The laser condensable hemostasis of 1.6 mum wavelengths, therefore while the laser instrument for exporting this two wave bands can be used to develop multiduty sharp
Light medical system, such as surgical knife, minimally invasive endoscope etc., it may also be used for laser communication, Laser Processing etc., with extensive
Application prospect and practical value.In various generations in the technology of near-infrared laser, put relative to optical parametric oscillator, optical parameter
For big device and QCL, optical fiber laser has high light beam quality, high conversion efficiency, high-peak power, wave band
Wide ranges, threshold value low and high " surface area/volume " than, the remarkable advantage such as pliability is good, use is flexible, be easily integrated, because
This efficient middle near infrared light fibre laser of development has important scientific meaning and using value.Foreign study is had at present
Mechanism carries out closing beam light beam of the acquisition containing two wave band of laser using two independent laser instrument, and complex structure, high cost is unfavorable
In popularization and application.Domestic research is concentrated mainly on the parametric oscillation of single wave band and obtains near-infrared laser or using FOPO skills
Art realizes the tunable infrared light output of small range, also has based on using the same gain fibre media implementation double wave of double pumping action source pumping
The document report of section output.
Laser instrument above has in the unstable problem of initial start stage output, affects using effect, such case
The oscillation principle of laser instrument is depended primarily on, is difficult to solve.
The content of the invention
There is baroque, Near-infrared Double wave band in a kind of single pumping of proposition to solve prior art in the present invention
Optical fiber laser and stable output intent.
The technical solution used in the present invention is as follows：
Near-infrared Double wave band optical fiber laser, is characterized in that in single pumping, and it includes fiber coupling output semiconductor laser
Pumping source, coupled lens group, the first reflecting mirror, double clad er-doped fluoride fiber, the second reflecting mirror, germainium lens, the 3rd reflection
Mirror, chronotron and controller；
Second reflecting mirror, germainium lens and the 3rd reflecting mirror are coaxially disposed, and optical axis and double clad er-doped fluoride fiber
Fiber axiss are coaxial, and the second reflecting mirror is arranged on the D end faces of double clad er-doped fluoride fiber, and the second reflecting mirror and the 3rd reflects
Mirror is respectively on the both sides focal plane of germainium lens；
The C-terminal face of double clad er-doped fluoride fiber constitutes the first resonator cavity with the E faces of the second reflecting mirror, and it is anti-with the 3rd
The G faces for penetrating mirror constitute the second resonator cavity；
Fiber coupling output semiconductor laser pumping source exports continuous pump light, and pump light is focused on and Jing by coupled lens group
Cross and entered in double clad er-doped fluoride fiber after the reflection of the first reflecting mirror；
Pump light is incident by the C-terminal of double clad er-doped fluoride fiber, and laser is in the first resonator cavity and the second resonator cavity
Vibrate respectively, form two middle near infrared band laser, then the transmission output of the reflecting mirrors of Jing first；
Chronotron is set on the laser beam axis of output, controller is connected with chronotron and controls it.
The stable output intent of Near-infrared Double wave band optical fiber laser, is characterized in that in single pumping, and the method includes following step
Suddenly：
The first step, the second reflecting mirror, germainium lens and the 3rd reflecting mirror are coaxially disposed, and optical axis is fluorinated with double clad er-doped
The fine fiber axiss of object light are coaxial, and the second reflecting mirror is arranged on the D end faces of double clad er-doped fluoride fiber, the second reflecting mirror and
3rd reflecting mirror is respectively on the both sides focal plane of germainium lens；
The C-terminal face of double clad er-doped fluoride fiber constitutes the first resonator cavity with the E faces of the second reflecting mirror, and it is anti-with the 3rd
The G faces for penetrating mirror constitute the second resonator cavity；
Fiber coupling output semiconductor laser pumping source exports continuous pump light, and pump light is focused on and Jing by coupled lens group
Cross the first reflecting mirror reflection after enter double clad er-doped fluoride fiber in, pump light by double clad er-doped fluoride fiber C
End is incident, and laser vibrates respectively in the first resonator cavity and the second resonator cavity, forms two middle near infrared band laser, Jing first
Reflecting mirror transmission output；
Second step, on the laser beam axis of output chronotron is arranged, and chronotron is controlled by controller, is filtered out defeated
Go out the initial stage power l fraction of laser beam, obtain the laser beam of power stability.
The invention has the beneficial effects as follows：Laser instrument of the present invention devises a kind of composite resonant cavity and a kind of delays time to control is opened
Close, delivery efficiency and oscillation mode control are carried out respectively to two wavelength by composite resonant cavity, to obtain metastable work(
Rate is exported；Enter line delay to output light by delay control switch to filter, remove relaxation oscillation of the laser instrument when starting initial
Output par, c, so as to obtain the middle near infrared light fibre laser of 2.8 μm and 1.6 μm two waveband laser power stability output.
In single pumping of the present invention Near-infrared Double wave band optical fiber laser can be applicable to laser medicine, photoelectronic warfare,
The fields such as laser communication, space exploration.
Description of the drawings
Fig. 1 be the present invention single pumping in the stable output optical fibre laser instrument of Near-infrared Double wave band structural representation, the figure
As for Figure of abstract.In figure, 1 is fiber coupling output semiconductor laser pumping source, 2 is coupled lens group, 3 is the first reflection
Mirror, 4 be double clad er-doped fluoride fiber, 5 be the second reflecting mirror, 6 be germainium lens, 7 be the 3rd reflecting mirror, 8 be chronotron, 9
For controller.
Fig. 2 is the laser levels transition structure principle chart of the present invention.Under the pumping of 975nm, ground state particle is excited to
High level4I11/2, under cascade mode, activation particle from4I11/2Energy level transition is arrived4I13/2Energy level produces 2.8 μm of laser output,
And from4I13/2Energy level transition is arrived4I15/2Energy level will produce 1.6 μm of laser output.
Fig. 3 exports two waveband laser light spectrogram for the experiment of the present invention.
Fig. 4 is the live width enlarged drawing of 1.6 mu m waveband parts in Fig. 3.
Fig. 5 is the live width enlarged drawing of 2.8 mu m waveband parts in Fig. 3.
Specific embodiment
The present invention is described in further details below in conjunction with the accompanying drawings.
As shown in figure 1, Near-infrared Double wave band optical fiber laser in single pumping, including fiber coupling output semiconductor laser pump
Pu source 1, coupled lens group 2, the first reflecting mirror 3, double clad er-doped fluoride fiber 4, the second reflecting mirror 5, germainium lens the 6, the 3rd
Reflecting mirror 7, chronotron 8 and controller 9.
Second reflecting mirror 5, the reflecting mirror 7 of germainium lens 6 and the 3rd are sequentially coaxially arranged, and optical axis and double clad er-doped fluoride
The fiber axiss of optical fiber 4 are coaxial.Second reflecting mirror 5 is arranged on the D end faces of double clad er-doped fluoride fiber 4, i.e., the second reflection
D end face of the E faces of mirror 5 against double clad er-doped fluoride fiber 4.It is saturating that second reflecting mirror 5 and the 3rd reflecting mirror 7 are located at respectively germanium
On the both sides focal plane of mirror 6.Germainium lens 6 enter line convergence adjustment to laser beam so as to be coupled into double clad Erbium-Doped Fluoride completely
Compound optical fiber 4, reduces light beam and overflows loss.
The E faces of the C-terminal face of double clad er-doped fluoride fiber 4 and the second reflecting mirror 5 constitute the first resonator cavity, and it is with the 3rd
The G faces of reflecting mirror 7 constitute the second resonator cavity, and two resonator cavitys are series relationship, are easy to regulation chamber long, the first resonator cavity and second
Resonator cavity carries out delivery efficiency and oscillation mode control to 1.6 μm and 2.8 μm of two wavelength respectively.
The continuous pump light of the described output of fiber coupling output semiconductor laser pumping source 1 975nm, pump light is by coupling
Microscope group 2 is focused on and entered in double clad er-doped fluoride fiber 4 after the first reflecting mirror 3 reflects, and pump light is mixed by double clad
The C-terminal of erbium fluoride fiber 4 is incident, and laser vibrates respectively in the first resonator cavity and the second resonator cavity, forms 1.6 μm and 2.8 μ
The middle near infrared band laser of m two, the transmission output of the first reflecting mirrors of Jing 3, arranges chronotron 8 on the laser beam axis of output, by
Controller 9 is controlled to chronotron 8, filters out the initial stage power l fraction of outgoing laser beam, obtains power stability
Laser beam.
The fiber coupling output semiconductor laser pumping source 1 is 975nm laser instrument, and Jing conducts optical fiber output.
The A end faces plating 975nm of the first described reflecting mirror 3 is all-trans film and 2.8 μm and 1.6 μm of anti-reflection films, and B end faces are plated
2.8 μm and 1.6 μm of anti-reflection films.
The double clad er-doped fluoride fiber 4 is working-laser material, and its D end face plates 2.8 μm and 1.6 μm of anti-reflection films, C
End face plates 975nm anti-reflection films and 2.8 μm and 1.6 μm of part anti-reflection films, and transmitance is 10%.Double clad er-doped fluoride fiber
4 have abundant level structure, wherein4I11/2Energy level,4I13/2Energy level and4I15/2Energy level three can form stop-over transition.
Under the pumping of 975nm, ground state is particle excitated to high level4I11/2, cascade oscillation mode under, activation particle from4I11/2Energy level jumps
Adjourn4I13/2Energy level produces 2.8 μm of laser output, Jin Ercong4I13/2Energy level transition is arrived4I15/2Energy level will produce 1.6 μm
Laser is exported, as shown in Figure 2.
The material of the second described reflecting mirror 5 is germanium, and its E end face plates 975nm and 1.6 μm and is all-trans and 2.8 μm of anti-reflection films, its
F end faces plate 2.8 μm of anti-reflection films.
Described 3rd reflecting mirror 7 is the gold-plated reflecting mirror of G end faces, the luminous reflectance 99% to 2.8 mum wavelengths.
Described chronotron 8 is filtered to laser beam, makes the power l fraction that the laser works initial stage exports
It is predominantly absorbed, then switch is opened, the laser beam of power stability is normally exported.
Described controller 9 is operated time control to chronotron 8, makes in this time period at laser works initial stage
Output l fraction is predominantly absorbed, and after two waveband laser power stability, switch is opened, and laser beam is normally exported.
Described chronotron 8 is electro-optical crystal switch, and fast response time, shut-off effect is good.
Described controller 9 is controller time delay, using digital circuit.
Near-infrared Double wave band optical fiber laser is obtained in list of the invention pumping 1.6 μm and 2.8 μm of two middle near-infrared ripples
Duan Jiguang is as shown in figure 3, the live width enlarged drawing of wherein 1.6 μm and 2.8 mu m waveband parts is shown in respectively Fig. 4 and Fig. 5.
The stable output intent of Near-infrared Double wave band optical fiber laser in single pumping, the method is comprised the following steps：
The first step, the second reflecting mirror 5, the reflecting mirror 7 of germainium lens 6 and the 3rd are coaxially disposed, and optical axis and double clad er-doped
The fiber axiss of fluoride fiber 4 are coaxial；Second reflecting mirror 5 is arranged on the D end faces of double clad er-doped fluoride fiber 4；Second is anti-
Penetrate the reflecting mirror 7 of mirror 5 and the 3rd to be located at respectively on the both sides focal plane of germainium lens 6；
The E faces of the C-terminal face of double clad er-doped fluoride fiber 4 and the second reflecting mirror 5 constitute the first resonator cavity, and it is with the 3rd
The G faces of reflecting mirror 7 constitute the second resonator cavity；
Described fiber coupling output semiconductor laser pumping source 1 exports continuous pump light, and pump light is by coupled lens group 2
Focus on and enter in double clad er-doped fluoride fiber 4 after the first reflecting mirror 3 reflects, pump light is fluorinated by double clad er-doped
The C-terminal of object light fibre 4 is incident, and laser vibrates respectively in the first resonator cavity and the second resonator cavity, forms two middle near infrared bands
Laser, i.e., 1.6 μm and 2.8 mu m wavebands, the transmission output of the first reflecting mirrors of Jing 3.
Second step, arranges chronotron 8 on the laser beam axis of output, and chronotron 8 is controlled by controller 9, filters
Fall the initial stage power l fraction of outgoing laser beam, obtain 1.6 μm and 2.8 mu m waveband laser beams of power stability.
Claims (10)
1. Near-infrared Double wave band optical fiber laser in single pumping, is characterized in that, it includes fiber coupling output semiconductor laser pump
Pu source (1), coupled lens group (2), the first reflecting mirror (3), double clad er-doped fluoride fiber (4), the second reflecting mirror (5), germanium
Lens (6), the 3rd reflecting mirror (7), chronotron (8) and controller (9)；
Second reflecting mirror (5), germainium lens (6) and the 3rd reflecting mirror (7) are sequentially coaxially arranged, and optical axis is fluorinated with double clad er-doped
The fiber axiss of object light fibre (4) are coaxial, and the second reflecting mirror (5) is arranged on the D end faces of double clad er-doped fluoride fiber (4), the
Two-mirror (5) and the 3rd reflecting mirror (7) are respectively on the both sides focal plane of germainium lens (6)；
The C-terminal face of double clad er-doped fluoride fiber (4) constitutes the first resonator cavity with the E faces of the second reflecting mirror (5), and it is with the 3rd
The G faces of reflecting mirror (7) constitute the second resonator cavity；
Fiber coupling output semiconductor laser pumping source (1) exports continuous pump light, and pump light is focused on simultaneously by coupled lens group (2)
Enter in double clad er-doped fluoride fiber (4) after the first reflecting mirror (3) reflection；
Pump light is incident by the C-terminal of double clad er-doped fluoride fiber (4), and laser divides in the first resonator cavity and the second resonator cavity
Do not vibrate, form two middle near infrared band laser, then the reflecting mirrors of Jing first (3) transmission outputs；
Chronotron (8) is set on the laser beam axis of output, and controller (9) is connected with chronotron (8), controls it.
2. Near-infrared Double wave band optical fiber laser in single pumping according to claim 1, it is characterised in that the optical fiber coupling
Conjunction output semiconductor laser pumping source (1) output wavelength is 975nm, and laser Jing conducts optical fiber output.
3. Near-infrared Double wave band optical fiber laser in single pumping according to claim 1, it is characterised in that described first
The A end faces plating 975nm of reflecting mirror (3) is all-trans film and 2.8 μm and 1.6 μm of anti-reflection films, and 2.8 μm and 1.6 μm of B end faces plating is anti-reflection
Film.
4. Near-infrared Double wave band optical fiber laser in single pumping according to claim 1, it is characterised in that the double clad
Er-doped fluoride fiber (4) is working-laser material, and its D end faces plating plating 2.8 μm and 1.6 μm of anti-reflection films, C-terminal face plating 975nm increases
Permeable membrane and 2.8 μm and 1.6 μm of part anti-reflection films, transmitance is 10%.
5. Near-infrared Double wave band optical fiber laser in single pumping according to claim 1, it is characterised in that described second
Reflecting mirror (5) material is germanium, and its E end face plates 975nm and 1.6 μm and is all-trans and 2.8 μm of anti-reflection films, and its 2.8 μm of F end faces plating is anti-reflection
Film.
6. Near-infrared Double wave band optical fiber laser in single pumping according to claim 1, it is characterised in that described germanium is saturating
Mirror (6) enters line convergence adjustment to laser beam so as to be coupled into double clad er-doped fluoride fiber (4) completely, reduces light beam and overflows
Go out loss.
7. Near-infrared Double wave band optical fiber laser in single pumping according to claim 1, it is characterised in that described the 3rd
Reflecting mirror (7) is the gold-plated reflecting mirror of G end faces, the luminous reflectance 99% to 2.8 mum wavelengths.
8. Near-infrared Double wave band optical fiber laser in single pumping according to claim 1, it is characterised in that described time delay
Device (8) is electro-optical crystal switch.
9. Near-infrared Double wave band optical fiber laser in single pumping according to claim 1, it is characterised in that described control
Device (9) is controller time delay, using digital circuit.
10. the stable output intent of Near-infrared Double wave band optical fiber laser in the single pumping described in claim 1, its feature are based on
It is that the method is comprised the following steps：
The first step, the second reflecting mirror (5), germainium lens (6) and the 3rd reflecting mirror (7) are sequentially coaxially arranged, and optical axis and double-contracting
The fiber axiss of layer er-doped fluoride fiber (4) are coaxial, and the second reflecting mirror (5) is arranged on the D of double clad er-doped fluoride fiber (4)
On end face, the second reflecting mirror (5) and the 3rd reflecting mirror (7) are located at respectively on the both sides focal plane of germainium lens (6)；
The C-terminal face of double clad er-doped fluoride fiber (4) constitutes the first resonator cavity with the E faces of the second reflecting mirror (5), and it is with the 3rd
The G faces of reflecting mirror (7) constitute the second resonator cavity；
Fiber coupling output semiconductor laser pumping source (1) exports continuous pump light, and pump light is focused on simultaneously by coupled lens group (2)
Enter in double clad er-doped fluoride fiber (4) after the first reflecting mirror (3) reflection, pump light is by double clad er-doped fluoride
The C-terminal of optical fiber (4) is incident, and laser vibrates respectively in the first resonator cavity and the second resonator cavity, forms two middle near infrared bands
Laser, the reflecting mirrors of Jing first (3) transmission outputs；
Second step, arranges chronotron (8) on the laser beam axis of output, and chronotron (8) is controlled by controller (9), filters
The initial stage power l fraction of outgoing laser beam is removed, the laser beam of power stability is obtained.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110581431A (en) * | 2019-09-11 | 2019-12-17 | 深圳大学 | Erbium-doped fluoride fiber laser and laser generation method |
| CN112350147A (en) * | 2020-11-06 | 2021-02-09 | 长春理工大学 | Intermediate infrared laser based on annular cavity mixing end pump pulse output |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040240488A1 (en) * | 2003-06-02 | 2004-12-02 | Fujikura Ltd. | Optical fiber laser and laser light emitting method |
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