CN105470796A - High-brightness ultra-wideband medium infrared super-continuum spectrum light source - Google Patents
High-brightness ultra-wideband medium infrared super-continuum spectrum light source Download PDFInfo
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- CN105470796A CN105470796A CN201511010547.0A CN201511010547A CN105470796A CN 105470796 A CN105470796 A CN 105470796A CN 201511010547 A CN201511010547 A CN 201511010547A CN 105470796 A CN105470796 A CN 105470796A
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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
- H01S3/09—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
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/3528—Non-linear optics for producing a supercontinuum
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Abstract
The invention relates to a high-brightness ultra-wideband medium infrared super-continuum spectrum light source. A femtosecond optical parametric amplifier (OPA), a space coupling device and selenide optical fiber are sequentially arranged along a light path direction, the femtosecond OPA comprises a femtosecond mode locking Yb laser, a continuous tuning semiconductor laser, a one second wave plate, a two-tone beam splitter, an achromatic doublet lens, a temperature control device, a periodically poled lithium niobate crystal, an infrared lens and a long-wave germanium-through optical filter, the space coupling device comprises two pieces of infrared lens and a three-dimensional adjustment rack, the selenide optical fiber is arranged on the three-dimensional adjustment rack between the two pieces of infrared lens, and the three-dimensional adjustment rack is used for fixing the optical fiber. By the high-brightness ultra-wideband medium infrared super-continuum spectrum light source, medium infrared super-continuum spectrum output with average power more than 20mW, a spectral range covering 2 to 12 micrometers and high spectrum flatness can be acquired, and the brightness of the high-brightness ultra-wideband medium infrared super-continuum spectrum light source is improved than a synchrotron-radiation medium infrared light source by two orders of magnitude.
Description
Technical field
The present invention relates to a kind of mid-infrared light source, particularly infrared super continuum source in a kind of high brightness ultra broadband, belongs to laser optoelectronic technical field.
Background technology
In infrared (MIR) super continuous spectrums (SC) light source because having, spectral width, spatial coherence are good, brightness advantages of higher, so it has epochmaking application in fields such as Molecular Spectroscopy, biomedical imaging, optical measurement, broad band laser radars.Broadband mid-infrared light source common at present mainly comprises hot pin, synchrotron radiation light source and novel quantum cascade laser (QCL).Wherein, synchrotron radiation light source can produce 10 at 1-10 μm
16-17photons/s/mm
2/ sr/cm
-1brightness, than hot pin height 2-3 order of magnitude.The synchrotron radiation light source that the MIR spectral detection of high s/n ratio and high spatial resolution only can use brightness higher, seriously limits the application of mid-infrared light spectral technology under routine experimentation environment.The development of QCL greatly improves the brightness of MIR wave band light source, and typical QCL can produce 4x10
23photons/s/mm
2/ sr/cm
-1brightness, more than 5 orders of magnitude higher than synchrotron radiation light source.But the wavelength tuning range of single QCL is less, in order to cover wider spectral region, multiple QCL need be combined, causing light source very complicated and cost is high.Comparatively speaking, MIRSC light source can provide free of discontinuities broadband spectral to cover, and brightness is usually more than 2 orders of magnitude higher than synchrotron radiation light source.Therefore, the generation of high brightness broadband MIRSC light source becomes the study hotspot of infrared optics and non-linear optical field in recent years.
Using short-pulse laser and non-linear middle infrared optical fiber as pumping source and nonlinear dielectric, it is the important channel producing MIRSC.At present, the nonlinear optical fiber for generation of MIRSC mainly contains tellurate glass optical fiber, fluoride glass fiber and chalcogenide glass fiber.Because the intrinsic multi-phonon of material absorbs, the IR cut off wavelength of tellurate glass optical fiber and fluoride glass fiber is shorter, and they only can be respectively used to produce the MIRSC being less than 5 μm He being less than 6 μm.Chalcogenide glass (comprising sulfide, selenides and tellurite glass) optical fiber is infrared in long wave has better light transmission, and chalcogenide glass has the highest non-linear in non-crystalline material, is suitable for very much producing broadband MIRSC.2011, US Naval Research Laboratory 2.5 μm of ultrafast laser pumping step-index single-mode As
2s
3optical fiber creates 1.5 ~ 5 μm of super continuous spectrums.The units such as Stanford Univ USAs in 2012 Er doping mode locked fiber laser pumping taper As
2s
3sulphur system optical fiber creates 2.2 ~ 5 μm of super continuous spectrums.2014,4 μm of femtosecond pulse pumping sulphur systems waveguide that the unit optical parametric amplifiers such as Australian National University produce obtains 2 ~ 8 μm of super continuous spectrums, 2015,4.1 μm of femtosecond pulse pumping sulphur system optical fiber that the unit optical parametric amplifiers such as Jiangsu Normal University produce obtain 2 ~ 10 μm of super continuous spectrums, average power is about 3mW, is the MIRSC of the highest covering 2 ~ 10 μm of brightness obtained.In actual applications, usually expect that MIRSC light source can cover 2-12 μm, and average power can reach more than 20mW.But, have not yet to see the report of the MIRSC light source that can reach this performance.
Summary of the invention
Be difficult to the problem obtaining covering 2-12 μm, average power is greater than infrared super continuum source in 20mW for prior art, the invention provides infrared super continuum source in a kind of high brightness ultra broadband.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
Infrared super continuum source in a kind of high brightness ultra broadband, has femtosecond OPA, Space Coupling device, step index Ge-Sb-Se/Ge-Se selenides optical fiber successively along optical path direction; Femtosecond OPA comprises femtosecond locked mode Yb laser, continuously adjustable semiconductor laser, 1/2 wave plate, beam splitting dichroic mirror, achromatic doublet, attemperating unit, PPLN crystal, Infrared Lens, long-pass germanium filter; Space Coupling device comprises two panels Infrared Lens and three-dimensional trim holder; Step index Ge-Sb-Se/Ge-Se selenides optical fiber is located on the three-dimensional trim holder between two panels Infrared Lens, and three-dimensional trim holder is used for fixed fiber; Femtosecond locked mode Yb laser and continuously adjustable semiconductor laser are respectively pumping source and the seed source of OPA, 1/2 wave plate is utilized to rotate to parallel with optical axis by pumping source with the polarization direction of the output beam of seed source, then conjunction bundle is carried out by beam splitting dichroic mirror, the light beam closed after bundle is coupled into PPLN crystal by achromatic doublet, and focus is positioned at germ nucleus; The light beam obtained after PPLN crystal is collected by Infrared Lens, and non-linear conversion remaining near-infrared pumping light and flashlight long-pass germanium filter are removed; The input that light beam is coupled into step index Ge-Sb-Se/Ge-Se selenides optical fiber by Infrared Lens carries out pumping to optical fiber, collects infrared excess continuous spectrum in generation export at the output of step index Ge-Sb-Se/Ge-Se selenides optical fiber with Infrared Lens.
As preferably, above-mentioned Infrared Lens material is ZnSe or chalcogenide glass.
As preferably, the core material of step index Ge-Sb-Se/Ge-Se selenides optical fiber is Ge-Sb-Se glass, and clad material is Ge-Se glass, and the numerical aperture of optical fiber is not less than 0.9, the diameter of fiber core is 5 ~ 10 μm, and the diameter of fiber cladding is 200 ~ 400 μm.
As preferably, femtosecond locked mode Yb laser is the femtosecond locked mode Yb laser that repetition rate is not less than 20MHz, centre wavelength is 1040nm.
As preferably, the continuously adjustable semiconductor laser of continuously adjustable semiconductor laser to be tuning range be 1344-1432nm.
As preferably, femtosecond OPA is the femtosecond OPA that repetition rate is not less than 20MHz, centre wavelength is 3.8-4.6 μm.
As preferably, outside PPLN crystal (6), be provided with attemperating unit (7), can the working temperature of control PPLN crystal (6).
The present invention has following characteristics and beneficial effect:
(1) adopt femtosecond locked mode Yb laser and continuously adjustable semiconductor laser respectively as the pumping source of femtosecond OPA and seed source, using PPLN as the nonlinear dielectric of OPA, wavelength can be obtained and export at the femtosecond pulse of 3.8-4.6 μm.Because the zero-dispersion wavelength of the step index Ge-Sb-Se/Ge-Se selenides optical fiber for generation of middle infrared excess continuous spectrum is in this wavelength band, therefore can realize carrying out pumping in the low the anomalous dispersion region of this optical fiber to optical fiber, thus obtain infrared excess continuous spectrum output in the good ultra broadband of flatness.
(2) step index Ge-Sb-Se/Ge-Se selenides optical fiber is excellent in the light transmission of 2-12 mu m waveband, and laser damage threshold is higher, is beneficial to infrared excess continuous spectrum in the ultra broadband producing high brightness (or high-average power).
(3) numerical aperture of step index Ge-Sb-Se/Ge-Se selenides optical fiber is adjustable to more than 0.9, is beneficial to the adjustment of optical fiber dispersion, thus the low the anomalous dispersion region of optical fiber and obtainable pump light source wavelength are matched.
Compared with prior art, the present invention can obtain that average power is greater than 20mW, spectral region covers 2-12 μm, the good super continuous spectrums of spectral flatness exports, more than high 2 orders of magnitude of brightness ratio synchrotron radiation mid-infrared light source, can be used for the fields such as Molecular Spectroscopy, biomedical imaging, optical measurement.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure: 1, femtosecond locked mode Yb laser, 2, continuously adjustable semiconductor laser, 3,1/2 slide, 4, beam splitting dichroic mirror, 5, achromatic doublet, 6, periodically poled lithium niobate crystal, 7, attemperating unit, 8,10,13, Infrared Lens, 9, long-pass germanium filter, 11, step index Ge-Sb-Se/Ge-Se selenides optical fiber, 12, three-dimensional trim holder.
Embodiment
Make preferred descriptions below in conjunction with accompanying drawing to embodiments of the present invention, it is only for illustration of concrete execution modes more of the present invention, and protection scope of the present invention is not limited only to these execution modes.The present invention has femtosecond OPA, Space Coupling device, step index Ge-Sb-Se/Ge-Se selenides optical fiber 11 successively along optical path direction; Wherein, femtosecond OPA comprises femtosecond locked mode Yb laser 1, continuously adjustable semiconductor laser 2,1/2 wave plate 3, beam splitting dichroic mirror 4, achromatic doublet 5, attemperating unit 7, PPLN crystal 6, Infrared Lens 8, long-pass germanium filter 9; Space Coupling device comprises two panels Infrared Lens 10,13 and three-dimensional trim holder 12; Selenides optical fiber 11 is located on the three-dimensional trim holder 12 between two panels Infrared Lens 10,13; Femtosecond locked mode Yb laser 1 and continuously adjustable semiconductor laser 2 are respectively pumping source and the seed source of OPA, 1/2 wave plate 3 is utilized to rotate to parallel with optical axis by pumping source with the polarization direction of the output beam of seed source, then conjunction bundle is carried out by beam splitting dichroic mirror 4, the light beam closed after bundle is coupled into PPLN crystal 6 by achromatic doublet 5, and focus is positioned at germ nucleus; The light beam obtained after PPLN crystal 6 is collected by Infrared Lens 8, and non-linear conversion remaining near-infrared pumping light and flashlight long-pass germanium filter 9 are removed; The input that light beam is coupled into step index Ge-Sb-Se/Ge-Se selenides optical fiber 11 by Infrared Lens 10 carries out pumping to optical fiber, collects infrared excess continuous spectrum in generation export at the output of step index Ge-Sb-Se/Ge-Se selenides optical fiber 11 with Infrared Lens 13.Infrared Lens 8,10,13 material is ZnSe or chalcogenide glass.The core material of step index Ge-Sb-Se/Ge-Se selenides optical fiber is Ge-Sb-Se glass, and clad material is Ge-Se glass, and the numerical aperture of optical fiber is not less than 0.9, and the diameter of fiber core is 5 ~ 10 μm, and the diameter of fiber cladding is 200 ~ 400 μm.Femtosecond locked mode Yb laser 1 is repetition rate is not less than 20MHz, centre wavelength is 1040nm femtosecond locked mode Yb laser 1.Femtosecond OPA is the femtosecond OPA that repetition rate is not less than 20MHz, centre wavelength is 3.8-4.6 μm.Continuously adjustable semiconductor laser 2 for tuning range be the continuously adjustable semiconductor laser 2 of 1344-1432nm.Attemperating unit is provided with outside PPLN crystal 6.
Detailed process is as follows: first according to the calculation of parameter group velocity dispersion of step index Ge-Sb-Se/Ge-Se selenides optical fiber 11, determine zero-dispersion wavelength of fiber; According to the zero-dispersion wavelength of optical fiber, by selecting the output wavelength of suitable seed source wavelength setting OPA, be located at the low the anomalous dispersion region of optical fiber; After setting seed source wavelength, 1/2 wave plate 3 is utilized to rotate to parallel with optical axis by pumping source 1 with the polarization direction of the output beam of seed source 2; Then carry out conjunction bundle by beam splitting dichroic mirror 4, the light beam closed after bundle is coupled into PPLN crystal 6 by achromatic doublet 5, and focus is positioned at PPLN crystal 6 center.The light beam obtained after PPLN crystal is collected by Infrared Lens 8, and non-linear conversion remaining near-infrared pumping light and flashlight long-pass germanium filter are removed; The input that light beam is coupled into step index Ge-Sb-Se/Ge-Se selenides optical fiber 11 by Infrared Lens 10 carries out pumping to optical fiber, collects infrared excess continuous spectrum in generation export at the output of optical fiber with terminal Infrared Lens 13.PPLN crystal 6 outside is provided with attemperating unit 7, can the working temperature of control PPLN crystal; The material of Infrared Lens 8,10,13 is ZnSe or chalcogenide glass; The core material of step index Ge-Sb-Se/Ge-Se selenides optical fiber 11 is Ge-Sb-Se glass, clad material is Ge-Se glass, the numerical aperture of optical fiber is not less than 0.9, the diameter of fiber core is 5 ~ 10 μm, the diameter of fiber cladding is 200 ~ 400 μm, and optical fiber adopts conventional rod in tube method to prepare.
Embodiment 1: average power is 30mW, spectral region is 2-12 μm, spectral flatness is ± the MIRSC light source of 13dB.
Using the step index Ge-Sb-Se/Ge-Se selenides optical fiber 11 that core diameter is 10 μm, cladding diameter is 400 μm, numerical aperture is 0.9, length is 14cm as the nonlinear dielectric producing MIRSC, take repetition rate as 30MHz, centre wavelength is 4.586 μm, OPA that pulse duration is 330fs is pump light source, when average draw power is 120mW, obtain that average power is 30mW, spectral region is 2-12 μm, spectral flatness is ± the MIRSC light source of 13dB.
Concrete grammar is: the group velocity dispersion first calculating optical fiber according to the parameter of step index Ge-Sb-Se/Ge-Se selenides optical fiber 11 (fibre core and cladding size and refractive index), and obtaining its zero-dispersion wavelength is 4.5 μm; Then according to the zero-dispersion wavelength of optical fiber, be 4.586 μm by arrange the centre wavelength of seed source be the output wavelength that 1344nm accurately sets OPA, this wavelength is positioned at the low the anomalous dispersion region of optical fiber; After setting the wavelength of seed source, 1/2 wave plate 3 is utilized to rotate to parallel with optical axis by pumping source with the polarization direction of the output beam of seed source; Then carry out conjunction bundle by beam splitting dichroic mirror 4, the light beam closed after bundle is coupled into PPLN crystal 6 by achromatic doublet 5, and focus is positioned at germ nucleus.The light beam obtained after PPLN crystal is collected by chalcogenide glass lens 8, and non-linear conversion remaining near-infrared pumping light and flashlight germanium filter plate 9 are removed; The wavelength obtained is that the input that the light beam of 4.586 μm is coupled into step index Ge-Sb-Se/Ge-Se selenides optical fiber 11 by ZnSe lens 10 carries out pumping to optical fiber, collects the MIRSC produced export at the output of optical fiber with ZnSe lens 13.
Embodiment 2: average power is 25mW, spectral region is 2-12 μm, spectral flatness is ± the MIRSC light source of 12dB
Using the step index Ge-Sb-Se/Ge-Se selenides optical fiber 11 that core diameter is 7.5 μm, cladding diameter is 300 μm, numerical aperture is 1.0, fiber lengths is 12cm as nonlinear dielectric, take repetition rate as 25MHz, centre wavelength is 3.964 μm, OPA that pulse duration is 320fs is pump light source, when average pump power is 100mW, obtain that average power is 25mW, spectral region is 2-12 μm, spectral flatness is ± the MIRSC light source of 12dB.
Concrete grammar is: the group velocity dispersion first calculating optical fiber according to the parameter of step index Ge-Sb-Se/Ge-Se selenides optical fiber 11 (fibre core and cladding size and refractive index), and obtaining zero-dispersion wavelength of fiber is 3.9 μm; Then according to the zero-dispersion wavelength of optical fiber, be 3.964 μm by arrange the centre wavelength of seed source be the output wavelength that 1410nm accurately sets OPA, this wavelength is positioned at the low the anomalous dispersion region of optical fiber; After setting the wavelength of seed source, 1/2 wave plate 3 is utilized to rotate to parallel with optical axis by pumping source with the polarization direction of the output beam of seed source; Then carry out conjunction bundle by beam splitting dichroic mirror 4, the light beam closed after bundle is coupled into PPLN crystal 6 by achromatic doublet 5, and focus is positioned at germ nucleus.The light beam obtained after PPLN crystal is collected by ZnSe lens 8, and non-linear conversion remaining near-infrared pumping light and flashlight germanium filter plate 9 are removed; The wavelength obtained is that the input that the light beam of 3.964 μm is coupled into step index Ge-Sb-Se/Ge-Se selenides optical fiber 11 by ZnSe lens 10 carries out pumping to optical fiber, collects the MIRSC produced export at the output of optical fiber with ZnSe lens 13.
Embodiment 3: average power is 21mW, spectral region is 2-12 μm, spectral flatness is ± the MIRSC light source of 10dB
Using the step index Ge-Sb-Se/Ge-Se selenides optical fiber 11 that core diameter is 5 μm, cladding diameter is 200 μm, numerical aperture is 1.3, fiber lengths is 18cm as nonlinear dielectric, take repetition rate as 21MHz, centre wavelength is 3.8 μm, OPA that pulse duration is 350fs is pump light source, when average pump power is 85mW, obtain that average power is 21mW, spectral region is 2-12 μm, spectral flatness is ± the MIRSC light source of 10dB.
Concrete grammar is: the group velocity dispersion first calculating optical fiber according to the parameter of step index Ge-Sb-Se/Ge-Se optical fiber 11 (fibre core and cladding size and refractive index), and obtaining zero-dispersion wavelength of fiber is 3.7 μm; Then according to the zero-dispersion wavelength of optical fiber, be 3.8 μm by arrange the wavelengths centered wavelength of seed source 2 be the output wavelength that 1432nm accurately sets OPA, this wavelength is positioned at the low the anomalous dispersion region of optical fiber; After setting the wavelength of seed source, 1/2 wave plate 3 is utilized to rotate to parallel with optical axis by pumping source with the polarization direction of the output beam of seed source; Then carry out conjunction bundle by beam splitting dichroic mirror 4, the light beam closed after bundle is coupled into PPLN crystal 6 by achromatic doublet 5, and focus is positioned at germ nucleus.The light beam obtained after PPLN crystal is collected by chalcogenide glass lens 8, and non-linear conversion remaining near-infrared pumping light and flashlight germanium filter plate 9 are removed; The wavelength obtained is that the light beam of 3.8 μm is coupled into step index Ge-Sb-Se/Ge-Se optical fiber 11 input by chalcogenide glass lens 10 carries out pumping to optical fiber, collects the MIRSC produced export at the output of optical fiber with chalcogenide glass lens 13.
Claims (7)
1. an infrared super continuum source in high brightness ultra broadband, is characterized in that: have femtosecond optical parameter amplifier (OPA), Space Coupling device, step index Ge-Sb-Se/Ge-Se selenides optical fiber (11) successively along optical path direction; Wherein, femtosecond OPA comprises femtosecond locked mode Yb laser (1), continuously adjustable semiconductor laser (2), 1/2 wave plate (3), beam splitting dichroic mirror (4), achromatic doublet (5), attemperating unit (7), periodically poled lithium niobate (PPLN) crystal (6), Infrared Lens (8), long-pass germanium filter (9); Space Coupling device comprises two panels Infrared Lens (10,13) and three-dimensional trim holder (12); Selenides optical fiber (11) is located on the three-dimensional trim holder (12) between two panels Infrared Lens (10,13); Femtosecond locked mode Yb laser (1) and continuously adjustable semiconductor laser (2) are respectively pumping source and the seed source of OPA, 1/2 wave plate (3) is utilized to rotate to parallel with optical axis by pumping source with the polarization direction of the output beam of seed source, then conjunction bundle is carried out by beam splitting dichroic mirror (4), the light beam closed after bundle is coupled into PPLN crystal (6) by achromatic doublet (5), and focus is positioned at germ nucleus; The light beam obtained after PPLN crystal (6) is collected by Infrared Lens (8), and non-linear conversion remaining near-infrared pumping light and flashlight long-pass germanium filter (9) are removed; The input that light beam is coupled into step index Ge-Sb-Se/Ge-Se selenides optical fiber (11) by Infrared Lens (10) carries out pumping to optical fiber, collects the middle infrared excess continuous spectrum produced export at the output Infrared Lens (13) of step index Ge-Sb-Se/Ge-Se selenides optical fiber (11).
2. infrared super continuum source in a kind of high brightness ultra broadband according to claim 1, is characterized in that, described Infrared Lens (8,10,13) material is ZnSe or chalcogenide glass.
3. infrared super continuum source in a kind of high brightness ultra broadband according to claim 1, the core material that it is characterized in that described step index Ge-Sb-Se/Ge-Se selenides optical fiber is Ge-Sb-Se glass, clad material is Ge-Se glass, the numerical aperture of optical fiber is not less than 0.9, the diameter of fiber core is 5 ~ 10 μm, and the diameter of fiber cladding is 200 ~ 400 μm.
4. infrared super continuum source in a kind of high brightness ultra broadband according to claim 1, is characterized in that, the repetition rate of described femtosecond locked mode Yb laser (1) is not less than 20MHz, centre wavelength is 1040nm.
5. infrared super continuum source in a kind of high brightness ultra broadband according to claim 1, is characterized in that, the tuning range of described continuously adjustable semiconductor laser (2) is 1344-1432nm.
6. infrared super continuum source in a kind of high brightness ultra broadband according to claim 1, is characterized in that, described femtosecond OPA is the femtosecond OPA that repetition rate is not less than 20MHz, centre wavelength is 3.8-4.6 μm.
7. infrared super continuum source in a kind of high brightness ultra broadband as claimed in claim 1, is characterized in that, be provided with attemperating unit (7) outside PPLN crystal (6).
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Cited By (6)
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| CN106785865A (en) * | 2016-12-22 | 2017-05-31 | 北京大学深圳研究生院 | A kind of super continuum light composes generation device |
| CN107450124A (en) * | 2016-05-30 | 2017-12-08 | 天津大学 | A kind of Wideband dispersion control optical fibre and its Dispersion managed method |
| CN107884069A (en) * | 2016-09-30 | 2018-04-06 | 高利通科技（深圳）有限公司 | A kind of broadband spectral light source |
| CN108508677A (en) * | 2018-03-12 | 2018-09-07 | 中国人民解放军国防科技大学 | Supercontinuum frequency conversion laser based on PP L N crystal |
| CN109861065A (en) * | 2018-12-12 | 2019-06-07 | 江苏师范大学 | Visible light strengthened super continuous spectrum light source based on suspension core fibre |
| CN111370982A (en) * | 2020-03-16 | 2020-07-03 | 宁波大学 | Chalcogenide optical fiber coupler for generating mid-infrared super-continuum spectrum |
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| CN107884069A (en) * | 2016-09-30 | 2018-04-06 | 高利通科技（深圳）有限公司 | A kind of broadband spectral light source |
| CN107884069B (en) * | 2016-09-30 | 2023-08-22 | 高利通科技（深圳）有限公司 | Broadband spectrum light source |
| CN106785865A (en) * | 2016-12-22 | 2017-05-31 | 北京大学深圳研究生院 | A kind of super continuum light composes generation device |
| CN108508677A (en) * | 2018-03-12 | 2018-09-07 | 中国人民解放军国防科技大学 | Supercontinuum frequency conversion laser based on PP L N crystal |
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| CN111370982A (en) * | 2020-03-16 | 2020-07-03 | 宁波大学 | Chalcogenide optical fiber coupler for generating mid-infrared super-continuum spectrum |
| CN111370982B (en) * | 2020-03-16 | 2021-06-15 | 宁波大学 | Chalcogenide optical fiber coupler for generating mid-infrared super-continuum spectrum |
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