CN107069397B - A kind of resonant cavity super continuum source output device - Google Patents
A kind of resonant cavity super continuum source output device Download PDFInfo
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- CN107069397B CN107069397B CN201710023185.1A CN201710023185A CN107069397B CN 107069397 B CN107069397 B CN 107069397B CN 201710023185 A CN201710023185 A CN 201710023185A CN 107069397 B CN107069397 B CN 107069397B
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- fiber
- acousto
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- super continuum
- optic modulator
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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
-
- 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
-
- 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
-
- 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
- H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The present invention provides a kind of resonant cavity super continuum source output device, including optical resonator and the Yb dosed optical fiber that is sequentially connected, laser, acousto-optic modulator and the tapered fiber intracavitary positioned at the optical resonance；The optical resonator, for controlling the intracavitary concussion function of light beam and exporting super continuum source；The Yb dosed optical fiber, the gain media as the super continuum source；The laser, the pumping source as the super continuum source；The acousto-optic modulator, for exporting the laser pulse of specific frequency；The tapered fiber, for enhancing the nonlinear effect of the super continuum source and the energy in shortwave direction.Device of the present invention simplifies the structure of existing super continuum source output device, realizes spectrum widening in the lower situation of pump power, reduces costs, and light-phototransformation efficiency is high.
Description
Technical field
The present invention relates to optical fiber laser fields, more particularly, to a kind of resonant cavity super continuum source output device.
Background technique
Super continuum source of the present invention is a kind of pulsed laser light source, is had wider relative to tunable laser
Spectral region.When strong light transmits in nonlinear dielectric, by Self-phase modulation (SPM), Cross-phase Modulation (XPM), four
The nonlinear effects such as wave mixing (FWM), stimulated Raman scattering (SRS), dispersive wave frequency displacement, soliton self-frequency sh and effect of dispersion are total to
Same-action so that spectrum greatly broadens, and generates super continuum source, and super continuum source spectral region can cover ultraviolet arrive
Near infrared region.
Since super continuous spectrums have the characteristics that spectral width, spatial coherence, in material analysis, optical coherence tomography, optical fiber
Communication and photoelectronic warfare etc. have important application.
Currently, the output device of super continuum source mainly utilizes the outer pump photon crystal of light pulse chamber in the prior art
Optical fiber is to generate super continuum source, and the super continuous spectrums good beam quality generated, spectral region is wide, and flatness is good；But
Big with ordinary optic fibre splice loss, splice attenuation, the intensity of required light pulse is larger, and fiber lengths are longer, higher cost.
Summary of the invention
The present invention provides a kind of resonant cavity super continuous spectrums for overcoming the above problem or at least being partially solved the above problem
Light source output device.
According to an aspect of the present invention, a kind of resonant cavity super continuum source output device, including optical resonance are provided
Chamber, Yb dosed optical fiber, laser, acousto-optic modulator and tapered fiber；
The optical resonator, for controlling the intracavitary concussion function of light beam and exporting super continuum source；
The Yb dosed optical fiber, the gain media as the super continuum source；
The laser, the pumping source as the super continuum source；
The acousto-optic modulator, for exporting the laser pulse of specific frequency；
The tapered fiber, for enhancing the nonlinear effect of the super continuum source and the energy in shortwave direction；
The acousto-optic modulator, Yb dosed optical fiber, laser and tapered fiber are sequentially connected, and are located at the optical resonator
It is interior；The acousto-optic modulator and the tapered fiber are also connected with the optical resonator respectively.
Further, the tapered fiber includes that region is bored in a drawing；Or
Region is bored in multiple drawings, each that cone region is drawn mutually to cascade, and cone region is respectively drawn to have identical or different drawing cone
Parameter.
Further, the tapered fiber is any one in multimode fibre, single mode optical fiber and photonic crystal fiber.
Further, the tapered fiber be insulation draw cone condition under carry out fused biconical taper processing after formed have one or
Multiple optical fiber for drawing cone region, and each both ends for drawing cone region have symmetrical cone plot structure.
Further, the optical resonator includes the first fiber grating and the second fiber grating, first fiber grating
It is connected with the acousto-optic modulator, second fiber grating is connected with the tapered fiber；Second fiber grating
For exporting the super continuum source.
Further, one end of second fiber grating connects the tapered fiber, and the other end is connected with output optical fibre；
The output optical fibre passes through chamfering process, for receiving the super continuum source of the second fiber grating output simultaneously
Externally output.
Further, the acousto-optic modulator is also connected with signal generator；
The signal generator, for optical signal parameters to be arranged, so that acousto-optic modulator output specific frequency swashs
Light pulse；
Further, the laser includes semiconductor laser and optical-fiber bundling device interconnected；
One end of the optical-fiber bundling device connects Yb dosed optical fiber, and the other end connects tapered fiber；
The semiconductor laser passes through the optical-fiber bundling device for the pumping source as the super continuum source
By laser coupled into the optical resonator, the adjustable Q laser pulse signal with the specific frequency identical frequency is exported.
Further, the range of the specific frequency is several hertz to several megahertzs.
Further, the acousto-optic modulator is also connected with acoustooptic modulator driver and driving power, the acousto-optic modulator
Driver is used to select driving power parameter according to the specification of the acousto-optic modulator, and the driving power is used for acousto-optic modulation
Device driving power supply.
The application proposes a kind of resonant cavity super continuum source output device based on tapered fiber, passes through the first optical fiber light
Grid and the second fiber grating form optical resonator, the pulse signal exported by the nonlinear effect of tapered fiber to laser
It is broadened, super continuum source is directly exported by the optical resonator, simplify existing super continuum source output dress
The structure set realizes spectrum widening in the lower situation of pump power, and spatial coherence is good, reduces costs, and light-light conversion
It is high-efficient.
Detailed description of the invention
Fig. 1 is a kind of resonant cavity super continuum source output device schematic diagram of the present invention；
Fig. 2 is tapered fiber schematic diagram of the present invention.
Description of symbols
1, the first fiber grating, 2, acousto-optic modulator, 3, signal generator, 4, Yb dosed optical fiber, 5, optical-fiber bundling device, 6, half
Conductor laser, 7, tapered fiber, the 8, second fiber grating, 9, output optical fibre.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
As shown in Figure 1, for a kind of resonant cavity super continuum source output device of the present invention, all may be used comprising this specification
Embodiment is selected, is specifically included:
Sequentially connected first fiber grating 1, acousto-optic modulator 2, Yb dosed optical fiber 4, optical-fiber bundling device 5, tapered fiber 7,
Second fiber grating 8 and output optical fibre 9, the acousto-optic modulator 2 are also connected with signal generator 3, and the optical-fiber bundling device 5 also connects
Connect semiconductor laser 6.
The present embodiment described device is by a pair of of high reflectance fiber grating, acousto-optic modulator, signal generator, doping light
Fibre, optical-fiber bundling device, semiconductor laser and tapered fiber composition.Wherein, fiber grating pair forms resonant cavity；Semiconductor laser
Device makees pumping source；Doped fiber makees gain operation material；Tapered fiber has high nonlinear coefficient, is for generating super continuous spectrums
Nonlinear dielectric；The super continuum source of generation is exported by output optical fibre.
The embodiment more brief as one, a kind of resonant cavity super continuous spectrums light based on tapered fiber provided by the invention
Source output device includes optical resonator, Yb dosed optical fiber, laser, acousto-optic modulator and tapered fiber；
The optical resonator, for controlling the intracavitary concussion function of light beam and exporting super continuum source；
The Yb dosed optical fiber, for the gain media as the super continuum source；
The laser, for the pumping source as the super continuum source；
The acousto-optic modulator, for exporting the laser pulse of specific frequency；
The tapered fiber, for enhancing the nonlinear effect of the super continuum source and the energy in shortwave direction；
The acousto-optic modulator, Yb dosed optical fiber, laser and tapered fiber are sequentially connected, and are located at the optical resonator
It is interior；The acousto-optic modulator and the tapered fiber are also connected with the optical resonator respectively.
The present invention can obtain good non-thread using tapered fiber as the nonlinear dielectric of the super continuum source
Property effect, and the energy in the shortwave direction of the super continuum source can be enhanced.
Ordinary optic fibre is drawn cone processing to change fibre-optical dispersion spy by drawing cone to can be obtained high nonlinear coefficient
Property, reduce zero-dispersion wavelength of fiber, it is easier to enhance the energy in super continuous spectrums shortwave direction.Laser is obtained in the case where cone condition is drawn in insulation
To tapered fiber in transmit when be lost small, and optical fiber both ends are small without fiber optic splicing loss other in processing, with laser,
Improve the light-light conversion efficiency of super continuum source.
When photonic crystal fiber carries out drawing cone processing, not only make photonic crystal fiber that there is stronger nonlinear effect, together
When change photonic crystal fiber zero-dispersion wavelength, keep shortwave oriented energy stronger.And super continuous spectrums are directly exported by resonant cavity
The structure that can simplify super continuum source, as laser is in intracavitary concussion, so that can be real in the lower situation of pump power
Existing spectrum widening.
The Yb dosed optical fiber can choose appropriate doping concentration and fiber lengths as gain operation material, to improve light-light
Transfer efficiency.According to experiment effect, when doping concentration is 3.9dB/m, and fiber lengths are 4m, it can be achieved that optimal spectrum broadening with
And light-light conversion efficiency.
Based on another optional embodiment of the more brief embodiment, the tapered fiber includes an area Ge Lazhui
Domain；Or
Region is bored in multiple drawings, each that cone region is drawn mutually to cascade, and cone region is respectively drawn to have identical or different drawing cone
Parameter.
Tapered fiber of the present invention may include a drawing cone region, also may include multiple drawing cones region.When described
When tapered fiber includes multiple drawings cone region, each draws cone region mutually to cascade, and each draws cone region can have
Parameter is bored in identical drawing, it is possible to have difference draws cone parameter.
Based on another optional embodiment of the more brief embodiment, the tapered fiber is multimode fibre, list
Any one in mode fiber and photonic crystal fiber.
As previously mentioned, using the ordinary optic fibre of multimode fibre or single mode optical fiber by drawing cone to handle as nonlinear dielectric,
Manufacturing process is very simple, and tapered fiber both ends are unprocessed, matches with resonant cavity inner fiber, draws when drawing cone process to meet insulation
When cone condition, laser transmission loss in tapered fiber is smaller, therefore the super continuum source based on tapered fiber is with higher
Light-light conversion efficiency.
And using photonic crystal fiber by drawing cone processing to draw cone photonic crystal fiber to have bigger as nonlinear dielectric
Super continuous spectrums output can be realized compared with short fiber in nonlinear factor, and in the case where meeting insulation and drawing cone condition, light transmits in a fiber
It is lost smaller.
Based on another optional embodiment of the more brief embodiment, the tapered fiber is to draw pricker bar in insulation
The optical fiber with one or more drawing cones region are formed after carrying out fused biconical taper processing under part, and each both ends tool for drawing cone region
There is symmetrical cone plot structure, as shown in Figure 2.The symmetrical cone plot structure can reduce laser in tapered fiber transmission loss.
For the tapered fiber relative to drawing with thinner diameter before cone, the optical fiber that cladding diameter is 125 μm can draw cone
It is 10 μm to diameter.In actual use, to avoid damage, the shell with fixture can be made and design radiator,
Tapered fiber is placed in the housing；And high folding glue is applied in the appropriate location of the tapered fiber, extra cladding light is stripped,
The tapered fiber is prevented to be burned out.
Based on another optional embodiment of the more brief embodiment, the optical resonator includes the first optical fiber
Grating and the second fiber grating, first fiber grating are connected with the acousto-optic modulator, second fiber grating with
The tapered fiber is connected；Second fiber grating is for exporting the super continuum source.
First fiber grating and the second fiber grating constitute optical resonator, and first fiber grating and second
Fiber grating has high reflectance；Laser realizes spectrum widening in the intracavitary concussion of the optical resonance.The optical resonance is intracavitary
Optical fiber can be built by single mode optical fiber or multimode fibre.
One end of second fiber grating connects the tapered fiber, and the other end is connected with output optical fibre；
The output optical fibre passes through chamfering process, for receiving the super continuum source of the second fiber grating output simultaneously
Externally output.
Second fiber grating only has reflex to the light of wavelength 1064nm, therefore super continuous spectrums laser can be by described
The output of second fiber grating.
In order to avoid Fresnel reflection, prevent output end damage output optical fibre weldable output end from emitting or taking at beveling
Reason.
Based on another optional embodiment of the more brief embodiment, the acousto-optic modulator is also connected with signal hair
Raw device；
The signal generator, for optical signal parameters to be arranged, so that acousto-optic modulator output specific frequency swashs
Light pulse.
The laser includes semiconductor laser and optical-fiber bundling device interconnected；
One end of the optical-fiber bundling device connects Yb dosed optical fiber, and the other end connects tapered fiber；
The semiconductor laser passes through the optical-fiber bundling device for the pumping source as the super continuum source
By laser coupled into the optical resonator, the adjustable Q laser pulse signal with the specific frequency identical frequency is exported.
The range of the specific frequency is several hertz to several megahertzs.The adjustable Q laser pulse signal, which passes through, has Gao Fei
The tapered fiber of linear coefficient, generates nonlinear effect, and spectrum widening forms super continuum source.
The acousto-optic modulator is also connected with acoustooptic modulator driver and driving power, and the acoustooptic modulator driver is used
In selecting driving power parameter according to the specification of the acousto-optic modulator, the driving power is used to drive to acousto-optic modulator and supply
Electricity.In use it should be noted that acousto-optic modulator damaging thresholding, avoids damaging the acousto-optic modulator beyond threshold value.
The present invention using tapered fiber as nonlinear optical fiber, pulling process is simple, reduce optical fiber usage amount, saving at
This；Directly nonlinear optical fiber is accessed in resonant cavity, is not needed using form is pumped outside amplifying stage or chamber, structure is simple, can be with
Export high-output power, wide spectral range, the super continuous spectrums that flatness is good and spatial coherence is good.
Finally, the present processes are only preferable embodiment, it is not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in protection of the invention
Within the scope of.
Claims (9)
1. a kind of resonant cavity super continuum source output device, which is characterized in that including optical resonator, Yb dosed optical fiber, laser
Device, acousto-optic modulator and tapered fiber；
The optical resonator, for controlling the intracavitary concussion function of light beam and exporting super continuum source；
The Yb dosed optical fiber, the gain media as the super continuum source；
The laser, the pumping source as the super continuum source；
The acousto-optic modulator, for exporting the laser pulse of specific frequency；
The tapered fiber, for enhancing the nonlinear effect of the super continuum source and the energy in shortwave direction；
The acousto-optic modulator, Yb dosed optical fiber, laser and tapered fiber are sequentially connected, and it is intracavitary to be located at the optical resonance；
The acousto-optic modulator and the tapered fiber are also connected with the optical resonator respectively.
2. device as described in claim 1, which is characterized in that the tapered fiber includes that region is bored in a drawing；Or
Region is bored in multiple drawings, each that cone region is drawn mutually to cascade, and respectively draws cone region that there is identical or different drawing to bore parameter.
3. device as described in claim 1, which is characterized in that the tapered fiber is multimode fibre, single mode optical fiber and photon
Any one in crystal optical fibre.
4. device as described in claim 1, which is characterized in that the tapered fiber is to be melted in the case where cone condition is drawn in insulation
The optical fiber that there is one or more to draw cone region are formed after drawing cone processing, and each both ends for drawing cone region are with symmetrical cone area
Structure.
5. device as described in claim 1, which is characterized in that the optical resonator includes the first fiber grating and the second light
Fine grating, first fiber grating are connected with the acousto-optic modulator, second fiber grating and the tapered fiber
It is connected；Second fiber grating is for exporting the super continuum source.
6. device as claimed in claim 5, which is characterized in that one end of second fiber grating connects the drawing and bores light
Fibre, the other end are connected with output optical fibre；
The output optical fibre passes through chamfering process, for receiving the super continuum source of second fiber grating output and external
Output.
7. device as described in claim 1, which is characterized in that the acousto-optic modulator is also connected with signal generator；
The signal generator, for optical signal parameters to be arranged, so that the laser arteries and veins of acousto-optic modulator output specific frequency
Punching.
8. device as claimed in claim 7, which is characterized in that the range of the specific frequency is several hertz to several megahertzs.
9. device as claimed in claim 7, which is characterized in that the acousto-optic modulator be also connected with acoustooptic modulator driver and
Driving power, the acoustooptic modulator driver are used to select driving power parameter, institute according to the specification of the acousto-optic modulator
Driving power is stated to power for driving to acousto-optic modulator.
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| CN107069397B true CN107069397B (en) | 2019-06-14 |
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| CN108512020B (en) * | 2017-09-22 | 2019-06-25 | 中国人民解放军国防科技大学 | Incoherent super-continuum spectrum light source with controllable spectrum and tunable output power |
| CN111751802B (en) * | 2020-07-27 | 2021-07-13 | 北京工业大学 | Photon-level self-adaptive high-sensitivity space weak target detection system and detection method |
| CN112713490B (en) * | 2020-12-28 | 2024-06-04 | 北京工业大学 | Mid-infrared band continuous all-fiber oscillator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825826A (en) * | 2010-04-16 | 2010-09-08 | 深圳大学 | Device for generating super continuous spectrums |
| CN104009377A (en) * | 2014-05-14 | 2014-08-27 | 北京工业大学 | Blue-light and ultraviolet-light enhancing super-continuum spectrum laser device of full-fiber structure |
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| CN101770132B (en) * | 2008-12-31 | 2012-09-05 | 中国科学院西安光学精密机械研究所 | Visible light strengthened super continuous spectrum laser system with all-optical-fiber structure |
| US20120281720A1 (en) * | 2011-05-06 | 2012-11-08 | Imra America, Inc. | Broadband generation of coherent continua with optical fibers |
| CN203071392U (en) * | 2013-03-09 | 2013-07-17 | 广东汉唐量子光电科技有限公司 | Super-continuum spectrum photonic crystal optical fiber laser |
| US9871336B2 (en) * | 2013-05-03 | 2018-01-16 | Atla Lasers As | Fiber amplifier |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101825826A (en) * | 2010-04-16 | 2010-09-08 | 深圳大学 | Device for generating super continuous spectrums |
| CN104009377A (en) * | 2014-05-14 | 2014-08-27 | 北京工业大学 | Blue-light and ultraviolet-light enhancing super-continuum spectrum laser device of full-fiber structure |
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