CN102751653A - Photonic crystal fiber based medium-infrared optical fiber parametric oscillator for degenerating four-wave mixing - Google Patents
Photonic crystal fiber based medium-infrared optical fiber parametric oscillator for degenerating four-wave mixing Download PDFInfo
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- CN102751653A CN102751653A CN2012102523476A CN201210252347A CN102751653A CN 102751653 A CN102751653 A CN 102751653A CN 2012102523476 A CN2012102523476 A CN 2012102523476A CN 201210252347 A CN201210252347 A CN 201210252347A CN 102751653 A CN102751653 A CN 102751653A
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Abstract
The invention discloses a photonic crystal fiber based medium-infrared optical fiber parametric oscillator for degenerating four-wave mixing and relates to a laser oscillator. The photonic crystal fiber based medium-infrared optical fiber parametric oscillator is provided with a laser pumping source, a focusing lens system, four reflectors and a photonic crystal fiber which are sequentially serially connected to an optical fiber annular cavity, the laser pumping source is coupled to enter the photonic crystal fiber through the focusing lens system, oscillation and lasing of signal light in a visible light wave band are guaranteed by the four reflectors, and coherent medium-infrared idle-frequency light is outputted from the tail end of the photonic crystal fiber. Pumping laser with the wave range of 1030-1070nm is coupled to the photonic crystal fiber to stimulate nonlinear effect of the optical fiber four-wave mixing so as to achieve output of the laser in the medium-infrared wave band. The four reflectors in a resonant cavity structure of the oscillator are used to guarantee that the signal light in the visible light wave band is completely reflected in the cavity, and coherent medium-infrared idle-frequency light is completely outputted from the tail end of the photonic crystal fiber so that conversion efficiency is high.
Description
Technical field
The present invention relates to a kind of laser oscillator, especially relate to a kind of middle infrared optical fiber parametric oscillator based on the photonic crystal fiber degeneration four-wave mixing.
Background technology
The mid-infrared laser source all has important use value and prospect aspect dual-use two.The technological approaches of realization mid-infrared laser has multiple, mainly can be divided into 4 big types, that is: (I) semiconductor quantum cascaded laser ([1] P.Q.Liu, A.J.Hoffman; M.D.Escarra, K.J.Franz, J.B.Khurgin, Y.Dikmelik; X.Wang, J.-Y.Fan, and C.F.Gmachl, " Highly power-efficient quantum cascade lasers "; Nat.Photon., vol.4 (2), pp.95-98,2010); (II) rare-earth-doped crystal laser ([2] K.S.Lai, W.J.Xie, R.F.Wu, Y.L.Lim; E.Lau, L.Chia, and P.B.Phua; " A 150W 2-micron diode-pumped Tm:YAG laser, " in Proceedings on Advanced Solid-State Lasers (OSA), vol.68; Pp.535-539,2002, Washington); (III) solid crystals optical parametric oscillator (OPO) ([3] T.J.Carrig and A.M.Schober, " Mid-Infrared lasers ", Photonics Journal, vol.2 (2), pp.207-212,2010); (IV) rare earth doped fiber laser ([4] P.F.Moulton, G.A.Rines, E.V.Slobodtchikov; K.F.Wall, G.Frith, B.Samson; And A.L.G.Carter, " Tm-doped fiber lasers:fundamentals and power scaling ", IEEE J.Sel.Topics in Quantum Electron.; 15 (1), pp.85-92,2009).In addition, iraser during technology such as employing free electron laser, chemical laser and gas laser frequency multiplication/difference frequency also can produce, but factors such as its expensive, complex structure make it be difficult to receive publicity.More than (I)-(IV) type technology its advantage is all arranged, also have inferior position separately.Although the semiconductor quantum concatenation technology has clear superiority in the iraser in obtaining miniaturization, broadband, its angle of divergence is big, beam quality is relatively poor, and because of heat management problems running under utmost point low temperature mostly, causes power output limited.The rare-earth-doped crystal laser technology still exists some shortcomings, is mainly reflected in: (1) crystal poor radiation, strong thermal effect require some special refrigeration means and equipment usually; (2) adopt a large amount of block opticses, cause laser system complicated.On the other hand, strong, the phase-matching condition of walk-off effect must accurately design when adopting crystal OPO technology, and numerous block optics need carry out numerous and diverse beam path alignment.Comparatively speaking, in infrared rare earth doped fiber laser because of it has that conversion efficiency height, good heat dissipation, beam quality are high, high power and be easy to remarkable advantages such as integrated, can remedy the deficiency in above-mentioned (I)-(III) type mid-infrared laser source to a certain extent.But rare earth doped fiber is realized>in 3 mu m wavebands iraser be still the technical bottleneck in this field, rare at present report.Based on above-mentioned analysis, a desirable solution is: in optical fiber, adopt the OPO technology, the appearance of photonic crystal fiber (like fluoride glass and tellurite glass, pure silicon dioxide or the like material) has brought huge opportunity for it undoubtedly.Through design photon crystal fiber guide parameter, the zero-dispersion wavelength of photonic crystal fiber, non linear coefficient etc. all can be by controls flexibly, and these parameters will help significantly promoting the efficient of parametric oscillation.Just because of this; Popular research and successful acquisition have been attracted based on mid-infrared laser ([5] Amir Herzog of photonic crystal fiber; Avishay Shamir; And Amiel A.Ishaaya.Optics Letters.Wavelength conversion of nanosecond pulses to the mid-IR in photonic crystal fibers.2012,37 (1): 82-84; [6] D.Nodop; C.Jauregui, D.Schimpf, J.Limpert; And A.Tunnermann.Optics Letters.Efficient high-power generation of visible and mid-infrared light by degenerate four-wave-mixing in a large-mode-area photonic-crystal fiber.2009; 34 (22): 3499-3501), still, these present research common ground are not constitute laserresonator; And then the output beam coherence is bad, and conversion efficiency is low.
Summary of the invention
The object of the present invention is to provide a kind of middle infrared optical fiber parametric oscillator based on the photonic crystal fiber degeneration four-wave mixing.
The present invention is provided with laser pumping source, focus lens system, 4 speculums, photonic crystal fiber; Said laser pumping source, focus lens system, 4 speculums, photonic crystal fibers are concatenated into fiber optic loop an actor's rendering of an operatic tune successively; Laser pumping source is coupled into photonic crystal fiber through focus lens system; The flashlight of 4 speculum assurance visible light wave ranges vibrates to swash in annular chamber and penetrates, infrared ideler frequency light during the terminal output of photonic crystal fiber is relevant.
Said laser pumping source can adopt 1030～1070nm wave band ytterbium-doping optical fiber laser etc.
The material of said photonic crystal fiber can be selected from fluoride glass, tellurite glass or pure silicon dioxide etc.
The present invention adopts 1030～1070nm wave band pumping laser to be coupled to photonic crystal fiber, and excitation fiber four wave mixing nonlinear effect has realized the output of middle-infrared band laser.The cavity resonator structure of this oscillator is flashlight reflection fully in the chamber that 4 speculums guarantee visible waveband, and relevant middle-infrared band ideler frequency light is exported from the photonic crystal fiber end fully, and conversion efficiency is high.
A kind of realization of the present invention is based on infrared parametric oscillator in the photonic crystal fiber, adopts the flashlight unity feedback, in the whole export structures of infrared ideler frequency light.The result shows that the present invention can significantly improve mid-infrared laser coherence and conversion efficiency.
Description of drawings
Fig. 1 is that the structure of the embodiment of the invention is formed sketch map.In Fig. 1, mark A is the laser pumping source input, and B is the output of middle-infrared band laser.
Fig. 2 is the typical phase matched curve (is example with pure silicon NKT LMA-8 photonic crystal fiber) of the embodiment of the invention.In Fig. 2, transverse axis is pump light wavelength (λ
Pump[μ m]), the longitudinal axis is signal and ideler frequency optical wavelength (λ
Signal, λ
Idler[μ m]).
Fig. 3 is the threshold curve (is example with pure silicon NKT LMA-8 photonic crystal fiber) of the embodiment of the invention.In Fig. 3, transverse axis is represented photonic crystal fiber length (Length of PCF [m]), and the longitudinal axis is represented threshold pump power (Threshold power [W]).
Fig. 4 is the oscillating characteristic (is example with pure silicon NKT LMA-8 photonic crystal fiber) of intracavity pump light, flashlight and the ideler frequency light of the embodiment of the invention.In Fig. 4, transverse axis is represented the position (Z [m]) of photonic crystal fiber, and the longitudinal axis is represented the power (Pump power, Signal power, Idler power [W]) of pump light, flashlight and ideler frequency light.
Fig. 5 is the variation (with pure silicon NKT LMA-8 photonic crystal fiber is example) of the efficient of the embodiment of the invention along with fiber lengths and pump power.In Fig. 5, transverse axis is represented the length (Length of PCF [m]) of photonic crystal fiber, the conversion efficiency of infrared ideler frequency light during the longitudinal axis is represented (Conversion efficiency of mid-IR idler [%]).
Embodiment
Referring to Fig. 1, the embodiment of the invention is provided with laser pumping source, 2,4 speculums of focus lens system (the 1st speculum the 3, the 2nd speculum the 4, the 3rd speculum the 5, the 4th speculum 6), photonic crystal fiber 7; Said laser pumping source, 2,4 speculums of focus lens system (the 1st speculum the 3, the 2nd speculum the 4, the 3rd speculum the 5, the 4th speculum 6), photonic crystal fiber 7 are concatenated into fiber optic loop an actor's rendering of an operatic tune successively; Laser pumping source is coupled into photonic crystal fiber 7 through focus lens system 2; The flashlight of 4 speculum 3～6 assurance visible light wave ranges vibrates to swash in annular chamber and penetrates, infrared ideler frequency light during photonic crystal fiber 7 terminal outputs are relevant.
Said laser pumping source adopts 1030～1070nm wave band ytterbium-doping optical fiber laser etc.
The material of said photonic crystal fiber 7 is selected from fluoride glass, tellurite glass or pure silicon dioxide etc.
With the 1030nm pumping source, NKT photonic crystal fiber (earth silicon material) is an example as gain media, and embodiment is described.
Mark A is 1030nm Yb dosed optical fiber laser pumping output.
The reflection wavelength of the 1st speculum 3 is about 640nm, and reflectivity is greater than 99%.
The reflection wavelength of the 2nd speculum 4 is about 640nm, and reflectivity is greater than 99%.
The reflection wavelength of the 3rd speculum 5 is about 640nm, and reflectivity is greater than 99%.
The reflection wavelength of the 4th speculum 6 is about 640nm, and reflectivity is greater than 99%.
The length of photonic crystal fiber 7 (NKT-LMA-8) is 1m, and core diameter is 8 μ m, and the airport diameter is 2.42 μ m, and airport and airport spacing are 5.5 μ m, as the nonlinear material that produces four wave mixing.
Mark 8 is the flashlight at the visible light wave range of intracavity reflecting, forms laser and in the chamber, vibrates.
Mark B is the laser output of middle-infrared band.
Fig. 2 provides the typical phase matched curve (is example with pure silicon NKT LMA-8 photonic crystal fiber) of the embodiment of the invention.Can find out, a flashlight and ideler frequency light and its coupling are always arranged corresponding to a pumping wavelength by Fig. 2, for example 1030nm pumping, the signal of its parametric gain and ideler frequency optical wavelength are respectively 0.641 μ m and 2.611 μ m.
Fig. 3 provides the threshold curve (is example with pure silicon NKT LMA-8 photonic crystal fiber) of the embodiment of the invention.Can know that by Fig. 3 within the specific limits, along with the increase of fiber lengths, threshold pump power reduces gradually.
Fig. 4 provides the oscillating characteristic (is example with pure silicon NKT LMA-8 photonic crystal fiber) of intracavity pump light, flashlight and the ideler frequency light of the embodiment of the invention.Can know by Fig. 4, when pump light is in crest, the trough of respective signal and ideler frequency; When pump light is in trough, the crest of respective signal and ideler frequency has proved the energy exchange processes of intracavity pump and signal and ideler frequency.
Fig. 5 provides the variation (with pure silicon NKT LMA-8 photonic crystal fiber is example) of the efficient of the embodiment of the invention along with fiber lengths and pump power.Can know that by Fig. 5 fixing pump power is along with the increase of fiber lengths; Efficient presents fluctuation as shown in the figure and changes; The reason that causes this variation mainly is the influence of fiber lengths to phase matched, and, along with length increases; The crest location that the fluctuation that appears changes descends gradually, just decrease in efficiency; Simultaneously, the length bandwidth is tolerated in definition in the drawings, and along with the increase of pump power, this tolerance length bandwidth reduces gradually, that is to say, reach parametric gain preferably, and is along with pump power increases, more responsive to the selection of fiber lengths.
Claims (3)
1. based on the middle infrared optical fiber parametric oscillator of photonic crystal fiber degeneration four-wave mixing, it is characterized in that being provided with laser pumping source, focus lens system, 4 speculums, photonic crystal fiber; Said laser pumping source, focus lens system, 4 speculums, photonic crystal fibers are concatenated into fiber optic loop an actor's rendering of an operatic tune successively; Laser pumping source is coupled into photonic crystal fiber through focus lens system; The flashlight of 4 speculum assurance visible light wave ranges vibrates to swash in annular chamber and penetrates, infrared ideler frequency light during the terminal output of photonic crystal fiber is relevant.
2. the middle infrared optical fiber parametric oscillator based on the photonic crystal fiber degeneration four-wave mixing as claimed in claim 1 is characterized in that said laser pumping source adopts 1030～1070nm wave band ytterbium-doping optical fiber laser etc.
3. the middle infrared optical fiber parametric oscillator based on the photonic crystal fiber degeneration four-wave mixing as claimed in claim 1 is characterized in that the material of said photonic crystal fiber is selected from fluoride glass, tellurite glass or pure silicon dioxide.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941518A (en) * | 2014-05-06 | 2014-07-23 | 中国科学院半导体研究所 | Adjustable all-optical oscillator based on silicon-based micro-ring resonant cavity thermo-optically tuning mechanism |
| CN104518415A (en) * | 2015-01-16 | 2015-04-15 | 中国计量学院 | Fiber optical parameter oscillator based on random interval fiber bragg grating intandem |
| CN104518414A (en) * | 2015-01-16 | 2015-04-15 | 中国计量学院 | Fiber optical parameter oscillator based on random phase shift fiber bragg grating |
| CN106451056A (en) * | 2016-12-14 | 2017-02-22 | 上海理工大学 | Active amplification type optical parameter oscillation feedback system |
| CN108267301A (en) * | 2018-03-15 | 2018-07-10 | 中国人民解放军国防科技大学 | Intermediate infrared high-reflection optical element testing device and method based on optical parametric oscillator |
| CN115000790A (en) * | 2022-06-06 | 2022-09-02 | 中国人民解放军国防科技大学 | Pulse middle and far infrared laser optical parametric oscillator with low pumping threshold and high conversion efficiency |
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| US20110261438A1 (en) * | 2010-04-26 | 2011-10-27 | Konstantin Vodopyanov | Broadly and fast tunable optical parametric oscillator |
| CN102244354A (en) * | 2011-06-08 | 2011-11-16 | 南京大学 | Infrared laser in ultra quantum conversion limit based on optic superlattice and construction method thereof |
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2012
- 2012-07-19 CN CN2012102523476A patent/CN102751653A/en active Pending
Patent Citations (2)
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| US20110261438A1 (en) * | 2010-04-26 | 2011-10-27 | Konstantin Vodopyanov | Broadly and fast tunable optical parametric oscillator |
| CN102244354A (en) * | 2011-06-08 | 2011-11-16 | 南京大学 | Infrared laser in ultra quantum conversion limit based on optic superlattice and construction method thereof |
Non-Patent Citations (2)
| Title |
|---|
| D. NODOP ET AL.: "Efficient high-power generation of visible and mid-infrared light by degenerate four-wave-mixing in a large-mode-area photonic-crystal fiber", 《OPTICS LETTERS》 * |
| YUJUN DENG ET AL.: "Broadly tunable femtosecond parametric oscillator using a photonic crystal fiber", 《OPTICS LETTERS》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941518A (en) * | 2014-05-06 | 2014-07-23 | 中国科学院半导体研究所 | Adjustable all-optical oscillator based on silicon-based micro-ring resonant cavity thermo-optically tuning mechanism |
| CN103941518B (en) * | 2014-05-06 | 2016-07-06 | 中国科学院半导体研究所 | Adjustable full optical generator based on silicon-based micro ring resonator thermo-optical tunability mechanism |
| CN104518415A (en) * | 2015-01-16 | 2015-04-15 | 中国计量学院 | Fiber optical parameter oscillator based on random interval fiber bragg grating intandem |
| CN104518414A (en) * | 2015-01-16 | 2015-04-15 | 中国计量学院 | Fiber optical parameter oscillator based on random phase shift fiber bragg grating |
| CN106451056A (en) * | 2016-12-14 | 2017-02-22 | 上海理工大学 | Active amplification type optical parameter oscillation feedback system |
| CN108267301A (en) * | 2018-03-15 | 2018-07-10 | 中国人民解放军国防科技大学 | Intermediate infrared high-reflection optical element testing device and method based on optical parametric oscillator |
| CN108267301B (en) * | 2018-03-15 | 2023-04-18 | 中国人民解放军国防科技大学 | Intermediate infrared high-reflection optical element testing device and method based on optical parametric oscillator |
| CN115000790A (en) * | 2022-06-06 | 2022-09-02 | 中国人民解放军国防科技大学 | Pulse middle and far infrared laser optical parametric oscillator with low pumping threshold and high conversion efficiency |
| CN115000790B (en) * | 2022-06-06 | 2024-04-02 | 中国人民解放军国防科技大学 | Pulse middle-far infrared laser optical parametric oscillator with low pumping threshold and high conversion efficiency |
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Application publication date: 20121024 |