CN104852260A - Dual-wavelength Q-switched pulse fiber laser - Google Patents
Dual-wavelength Q-switched pulse fiber laser Download PDFInfo
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- CN104852260A CN104852260A CN201510290574.1A CN201510290574A CN104852260A CN 104852260 A CN104852260 A CN 104852260A CN 201510290574 A CN201510290574 A CN 201510290574A CN 104852260 A CN104852260 A CN 104852260A
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Abstract
The invention provides a dual-wavelength Q-switched pulse fiber laser comprising a first laser pump source, a second laser pump source, a light beam combination device, a diachronic mirror, a coupling lens, a dual-cladding Er <3+>-doped ZBLAN fiber, a first collimating lens, a focusing lens, an equivalent saturable absorber, a second collimating lens, and a high reflector. The light beam combination device, the diachronic mirror, the coupling lens, the dual-cladding Er <3+>-doped ZBLAN fiber, the first collimating lens, the focusing lens, the equivalent saturable absorber, the second collimating lens, and the high reflector are connected in sequence. The first laser pump source and the second laser pump source are connected with the light beam combination device. The reflection wavelength of the high reflector is 3 to 5 microns. The high reflector and the front end surface of the dual-cladding Er <3+>-doped ZBLAN fiber form a laser resonance cavity; and in the dual-cladding Er <3+>-doped ZBLAN fiber, the energy level transition of the Er <3+> ion corresponds to transition radiation of the wavelength of 3.2 to 3.9 microns, thereby realizing output of high-power pulse laser with the wavelength larger than 3 microns. On the basis of the way, a problem that the traditional fiber laser uses a single wavelength pump source and thus laser with the wavelength larger than 3 microns can not be generated easily can be solved.
Description
Technical field
The present invention relates to mid-infrared laser technical field, particularly relate to a kind of dual wavelength Q impulse fiber laser.
Background technology
Wave-length coverage is that the middle pulsed infrared laser source of 3 ~ 5 μm has important application prospect in national defence (as: infrared directional jamming), biologic medical (as: Minimally Invasive Surgery), the special material processing field such as (as: glass, pottery, organic polymer etc.), atmospheric optical communication.Fiber laser has that brightness is high, peak power is high, tunable, laser threshold is low, output beam quality is good, conversion efficiency high and high " surface area/volume " than, pliability and flexibility good, be easy to the remarkable advantage such as integrated, the middle infrared pulse fiber laser therefore developing 3 ~ 5 μm has important scientific meaning and using value.
The mode realizing pulsed optical fibre laser output at present mainly contains three kinds: (1) gain modulation; (2) Q (comprise actively Q-switched and passive Q-adjusted) is adjusted; (3) locked mode (comprising active mode locking and passive mode locking).Gain modulation mode carries out periodic modulation by the mode of pulse pump to the population of energy level in laser transition, the pulse realizing laser exports, but which needs to carry out pulse modulation to pump laser, easy damage pump laser and fiber end face, therefore do not recommend in actual applications.Q mode is adjusted to be generally used for the pulse laser realizing ns and μ s magnitude, locked mode mode is then generally used for the ultra-short pulse laser realizing ps and even fs magnitude, wherein, actively Q-switched or active mode locking mode need complicated external drive modulation device (as: acousto-optic modulator, electrooptic modulation etc.), and passive Q-adjusted or passive mode locking mode often adopts structure simpler, compact and the saturable absorption device that cost is comparatively cheap realizes, therefore adjust the passive Q-adjusted and passive mode locking mode in Q and locked mode mode, be more subject to the favor of people.
At present, under being limited to traditional pump mode, the radiation wavelength that infrared gain fibre is shorter, and be limited to and lack infrared saturable absorption device in suitable high-performance long wavelength, therefore the operation wavelength of existing middle infrared pulse fiber laser is limited within the scope of 2.8 ~ 3.0 μm.Although the mode that prior art proposes to guide gain modulation by actively Q-switched and active mode locking can realize wavelength more than 3 μm in infrared pulse optical-fiber laser export, but which is the category belonging to initiatively modulation system, and its operation wavelength also only above 3 μm of tens nm, is therefore seldom applied in practice.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of dual wavelength pumping Q impulse fiber laser, can solve the problem that traditional fiber laser adopts single wavelength pumping source to be difficult to produce wavelength to be greater than the laser of 3 μm.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of dual wavelength pumping Q impulse fiber laser, comprises the first laser pumping source, the second laser pumping source and the combiner device be linked in sequence, dichroic mirror, coupled lens, double clad mix Er
3+zBLAN optical fiber, the first collimating lens, condenser lens, equivalent saturable absorber, the second collimating lens and high reflection mirror, described first laser pumping source is all connected described combiner device with described second laser pumping source; Described first laser pumping source exports the first pump light to described combiner device, described second laser pumping source is different from the second pump light of described first pump light to described combiner device output wavelength, described first pump light and described second pump light synthesize and singly restraint pump light by described combiner device, described single bundle pump light through described dichroic mirror high thoroughly after, then be coupled to described double clad by described coupled lens and mix Er
3+in the inner cladding of ZBLAN optical fiber, described double clad mixes Er
3+zBLAN optical fiber is from tail end to described first collimating lens Output of laser, described first collimating lens obtains directional light to after laser alignment, described directional light focuses on described equivalent saturable absorber by described condenser lens, described in described equivalent saturable absorber transmission, directional light obtains transmitted light, and described transmitted light vertically to be injected and by described high reflection mirror after described second collimating lens collimation; Wherein, the reflection wavelength of described high reflection mirror is 3 ~ 5 μm, and described high reflection mirror and described double clad mix Er
3+the front end face of ZBLAN optical fiber forms laserresonator, and mixes Er in described double clad
3+in ZBLAN optical fiber, Er
3+the transition radiation of energy level transition correspondence 3.2 ~ 3.9 mum wavelength of ion, to realize the high power pulsed laser that output wavelength is greater than 3 μm.
Preferably, the wave-length coverage of described first pump light is 970 ~ 980nm, and the wave-length coverage of described second pump light is 1900 ~ 2000nm.
Preferably, described equivalent saturable absorber is Fe:
2+znSe crystal.
Preferably, described high reflection mirror is gold-plated speculum.
Be different from the situation of prior art, the invention has the beneficial effects as follows:
One, efficiency and the power output of fiber laser is significantly improved, thus reach the object efficiently, stably exporting 3.2 ~ 3.9 μm of high-power laser pulses, efficiently solve the problem that traditional fiber laser adopts single wavelength pumping source to be difficult to produce wavelength to be greater than the laser of 3 μm.
Two, efficiently solve traditional saturable absorber be difficult in infrared long-wave band realize the problem of saturable absorption, technical foundation has been established in the realization for long wavelength's pulsed optical fibre laser.
Three, by the laser pumping simultaneously doping with rare-earth ions optical fiber of use two kinds of different wave lengths, effectively overcome the restriction of Stokes effect, be conducive to realizing high power pump light pulse expeditiously and export.
Four, overall structure integrated level is high, portable good, is conducive to practical application.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment of the present invention dual wavelength Q impulse fiber laser.
Fig. 2 is that the double clad of embodiment of the present invention dual wavelength Q impulse fiber laser mixes Er
3+er in ZBLAN optical fiber
3+the partial energy level diagram of ion.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
See Fig. 1, it is the structural representation of embodiment of the present invention dual wavelength Q impulse fiber laser.The dual wavelength Q impulse fiber laser of the present embodiment comprises the first laser pumping source 1, second laser pumping source 2 and the combiner device 3 be linked in sequence, dichroic mirror 4, coupled lens 5, double clad mix Er
3+zBLAN optical fiber 6, first collimating lens 7, condenser lens 8, equivalent saturable absorber 9, second collimating lens 10 and high reflection mirror 11.First laser pumping source 1 is all connected combiner device 3 with the second laser pumping source 2.
First laser pumping source 1 exports the first pump light to combiner device 3, second laser pumping source 2 is different from the second pump light of the first pump light to combiner device 3 output wavelength, first pump light and the second pump light synthesize and singly restraint pump light by combiner device 3, single bundle pump light through dichroic mirror 4 high thoroughly after, then be coupled to double clad by coupled lens 5 and mix Er
3+in the inner cladding of ZBLAN (fluoride) optical fiber 6, double clad mixes Er
3+zBLAN optical fiber 6 is from tail end to the first collimating lens 7 Output of laser, directional light is obtained after first collimating lens 7 pairs laser alignment, directional light focuses on equivalent saturable absorber 9 by condenser lens 8, equivalence saturable absorber 9 transmissive parallel light obtains transmitted light, and transmitted light is vertically injected and by high reflection mirror 11 after the second collimating lens 10 collimates.In the present embodiment, the first laser pumping source 1, second laser pumping source 2 all adopts semiconductor laser pumping source, and the wave-length coverage of the first pump light is 970 ~ 980nm, and the wave-length coverage of the second pump light is 1900 ~ 2000nm.Equivalence saturable absorber 9 is Fe:
2+znSe crystal, high reflection mirror 11 is gold-plated speculum.
Wherein, the reflection wavelength of high reflection mirror 11 is 3 ~ 5 μm, and high reflection mirror 11 and double clad mix Er
3+the front end face of ZBLAN optical fiber 6 forms laserresonator, and mixes Er in double clad
3+in ZBLAN optical fiber 6, Er
3+the transition radiation of energy level transition correspondence 3.2 ~ 3.9 mum wavelength of ion, to realize the high power pulsed laser that output wavelength is greater than 3 μm.By the dual wavelength Q impulse fiber laser of the embodiment of the present invention, the high-power laser pulse wavelength of output can reach 3.2 ~ 3.9 μm.
Below in conjunction with Fig. 2, the course of work in the embodiment of the present invention is described.In a kind of application scenarios of the embodiment of the present invention, the wavelength of the first pump light is 975nm, and the wavelength of the second pump light is 1973nm.First pump light and the second pump light are synthesized by combiner device 3 and singly restraint pump light, single bundle pump light through dichroic mirror 4 high thoroughly after, then be coupled into double clad by coupled lens 5 and mix Er
3+in the inner cladding of ZBLAN optical fiber 6.When the first laser pumping source 1 pumping starts, be positioned at energy level
4i
15/2particle on 12 is pumped into energy level by ground state absorption
4i
11/2on 14, and
4i
11/214 arrive
4i
13/213 reach pumping threshold before, energy level
4i
11/2the particle obtained on 14, under the pumping of the second laser pumping source 2, is pumped into energy level again
4f
9/2on 16, at energy level
4f
9/216 and energy level
4i
9/2form population inversion between 15, thus formation wave-length coverage is the laser emission of 3.2 ~ 3.9 μm, and under the effect of equivalent saturable absorber 9, produces stable passive Q regulation pulse and export.
In this application scenarios, the wavelength adopted due to the first pump light and the second pump light is respectively 975nm and 1973nm, and what this application scenarios adopted is that double clad mixes Er
3+zBLAN optical fiber, wherein, double clad mixes Er
3+er in ZBLAN optical fiber 6
3+corresponding energy level
4i
15/2,
4i
13/2,
4i
11/2,
4i
9/2,
4f
9/2the pulse laser wavelength produced is 3.2 ~ 3.9 μm, corresponds to
4f
9/2→
4i
9/2energy level transition.
By the way, the dual wavelength Q impulse fiber laser of the embodiment of the present invention adopts two pump lights that two laser pumping source output wavelengths are different, is coupled into double clad and mixes Er after two pump lights are synthesized
3+zBLAN optical fiber, and by the effect of equivalent saturable absorber, final output wavelength scope at the passive Q regulation pulse of 3.2 ~ 3.9 μm, thus solves the problem that traditional fiber laser adopts single wavelength pumping source to be difficult to produce wavelength to be greater than the laser of 3 μm.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (4)
1. a dual wavelength Q impulse fiber laser, is characterized in that, comprises the first laser pumping source, the second laser pumping source and the combiner device be linked in sequence, dichroic mirror, coupled lens, double clad mix Er
3+zBLAN optical fiber, the first collimating lens, condenser lens, equivalent saturable absorber, the second collimating lens and high reflection mirror, described first laser pumping source is all connected described combiner device with described second laser pumping source;
Described first laser pumping source exports the first pump light to described combiner device, described second laser pumping source is different from the second pump light of described first pump light to described combiner device output wavelength, described first pump light and described second pump light synthesize and singly restraint pump light by described combiner device, described single bundle pump light through described dichroic mirror high thoroughly after, then be coupled to described double clad by described coupled lens and mix Er
3+in the inner cladding of ZBLAN optical fiber, described double clad mixes Er
3+zBLAN optical fiber is from tail end to described first collimating lens Output of laser, described first collimating lens obtains directional light to after laser alignment, described directional light focuses on described equivalent saturable absorber by described condenser lens, described in described equivalent saturable absorber transmission, directional light obtains transmitted light, and described transmitted light vertically to be injected and by described high reflection mirror after described second collimating lens collimation;
Wherein, the reflection wavelength of described high reflection mirror is 3 ~ 5 μm, and described high reflection mirror and described double clad mix Er
3+the front end face of ZBLAN optical fiber forms laserresonator, and mixes Er in described double clad
3+in ZBLAN optical fiber, Er
3+the transition radiation of energy level transition correspondence 3.2 ~ 3.9 mum wavelength of ion, to realize the high power pulsed laser that output wavelength is greater than 3 μm.
2. dual wavelength Q impulse fiber laser according to claim 1, is characterized in that, the wave-length coverage of described first pump light is 970 ~ 980nm, and the wave-length coverage of described second pump light is 1900 ~ 2000nm.
3. dual wavelength Q impulse fiber laser according to claim 1 and 2, is characterized in that, described equivalent saturable absorber is Fe:
2+znSe crystal.
4. the dual wavelength Q impulse fiber laser according to any one of claim 1 or 2, is characterized in that, described high reflection mirror is gold-plated speculum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510290574.1A CN104852260A (en) | 2015-05-29 | 2015-05-29 | Dual-wavelength Q-switched pulse fiber laser |
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|---|---|---|---|
| CN201510290574.1A CN104852260A (en) | 2015-05-29 | 2015-05-29 | Dual-wavelength Q-switched pulse fiber laser |
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| CN201510290574.1A Pending CN104852260A (en) | 2015-05-29 | 2015-05-29 | Dual-wavelength Q-switched pulse fiber laser |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106058624A (en) * | 2016-06-29 | 2016-10-26 | 电子科技大学 | Tunable gain-control intermediate infrared pulse fiber laser and method for obtaining laser |
| CN106159662A (en) * | 2016-08-26 | 2016-11-23 | 四川大学 | Iron-doped zinc selenide saturable absorbing mirror and the mode locked fiber laser prepared and constitute thereof |
| CN106785846A (en) * | 2017-03-31 | 2017-05-31 | 电子科技大学 | A kind of changeable visible light fiber laser of wavelength |
| CN107069403A (en) * | 2017-06-08 | 2017-08-18 | 电子科技大学 | Based on cascade draw cone fluoride fiber it is tunable in infrared mode locked fiber laser |
| CN107317219A (en) * | 2017-07-07 | 2017-11-03 | 西北大学 | Dual wavelength pulse optical fiber laser based on rhenium disulfide saturable absorber |
| CN108539572A (en) * | 2018-04-28 | 2018-09-14 | 西北大学 | A kind of dual wavelength synchronization Q adjusting optical fiber laser based on graphene Electro-optical Modulation |
| CN110048294A (en) * | 2019-03-20 | 2019-07-23 | 广东朗研科技有限公司 | A kind of method of infrared ultrafast pulsed laser in generation high power |
| WO2021007896A1 (en) * | 2019-07-17 | 2021-01-21 | 深圳大学 | Dual-wavelength pumped erbium-doped fluoride fiber laser and laser light generating method |
| CN112563872A (en) * | 2020-12-10 | 2021-03-26 | 江苏师范大学 | Dual-wavelength pumping thulium-doped laser based on GSA and ESA |
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| CN103022869A (en) * | 2012-12-31 | 2013-04-03 | 电子科技大学 | Passive mode-locking guide gain modulated dual-wavelength pulse optical fiber laser |
| CN103606808A (en) * | 2013-12-10 | 2014-02-26 | 电子科技大学 | Medium-infrared fiber laser for dual-wavelength cascading pumping |
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Patent Citations (2)
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| CN103022869A (en) * | 2012-12-31 | 2013-04-03 | 电子科技大学 | Passive mode-locking guide gain modulated dual-wavelength pulse optical fiber laser |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106058624A (en) * | 2016-06-29 | 2016-10-26 | 电子科技大学 | Tunable gain-control intermediate infrared pulse fiber laser and method for obtaining laser |
| CN106058624B (en) * | 2016-06-29 | 2019-07-02 | 电子科技大学 | Infrared pulse optical fiber laser and the method for obtaining laser in tunable gain modulation |
| CN106159662A (en) * | 2016-08-26 | 2016-11-23 | 四川大学 | Iron-doped zinc selenide saturable absorbing mirror and the mode locked fiber laser prepared and constitute thereof |
| CN106785846A (en) * | 2017-03-31 | 2017-05-31 | 电子科技大学 | A kind of changeable visible light fiber laser of wavelength |
| CN107069403A (en) * | 2017-06-08 | 2017-08-18 | 电子科技大学 | Based on cascade draw cone fluoride fiber it is tunable in infrared mode locked fiber laser |
| CN107317219A (en) * | 2017-07-07 | 2017-11-03 | 西北大学 | Dual wavelength pulse optical fiber laser based on rhenium disulfide saturable absorber |
| CN108539572A (en) * | 2018-04-28 | 2018-09-14 | 西北大学 | A kind of dual wavelength synchronization Q adjusting optical fiber laser based on graphene Electro-optical Modulation |
| CN110048294A (en) * | 2019-03-20 | 2019-07-23 | 广东朗研科技有限公司 | A kind of method of infrared ultrafast pulsed laser in generation high power |
| CN110048294B (en) * | 2019-03-20 | 2020-05-08 | 广东朗研科技有限公司 | Method for generating high-power intermediate infrared ultrafast pulse laser |
| WO2021007896A1 (en) * | 2019-07-17 | 2021-01-21 | 深圳大学 | Dual-wavelength pumped erbium-doped fluoride fiber laser and laser light generating method |
| CN112563872A (en) * | 2020-12-10 | 2021-03-26 | 江苏师范大学 | Dual-wavelength pumping thulium-doped laser based on GSA and ESA |
| CN112563872B (en) * | 2020-12-10 | 2022-06-17 | 江苏师范大学 | Dual-wavelength pumping thulium-doped laser based on GSA and ESA |
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Application publication date: 20150819 |