CN1108010C - Optical parametric amplifier - Google Patents
Optical parametric amplifier Download PDFInfo
- Publication number
- CN1108010C CN1108010C CN 99124198 CN99124198A CN1108010C CN 1108010 C CN1108010 C CN 1108010C CN 99124198 CN99124198 CN 99124198 CN 99124198 A CN99124198 A CN 99124198A CN 1108010 C CN1108010 C CN 1108010C
- Authority
- CN
- China
- Prior art keywords
- crystal
- pump light
- amplifier element
- flashlight
- optical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 40
- 239000013078 crystal Substances 0.000 claims abstract description 39
- 239000007787 solid Substances 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 235000019837 monoammonium phosphate Nutrition 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 229910019142 PO4 Inorganic materials 0.000 claims description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 2
- OGFMUZSDWFEMCY-UHFFFAOYSA-N [Cd].[As].[Ge] Chemical compound [Cd].[As].[Ge] OGFMUZSDWFEMCY-UHFFFAOYSA-N 0.000 claims description 2
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 claims description 2
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- VCZFPTGOQQOZGI-UHFFFAOYSA-N lithium bis(oxoboranyloxy)borinate Chemical compound [Li+].[O-]B(OB=O)OB=O VCZFPTGOQQOZGI-UHFFFAOYSA-N 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 2
- 239000010452 phosphate Substances 0.000 claims description 2
- 229910052700 potassium Inorganic materials 0.000 claims description 2
- 239000011591 potassium Substances 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 10
- 230000003321 amplification Effects 0.000 abstract description 9
- 238000005086 pumping Methods 0.000 abstract description 2
- 230000001360 synchronised effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910013553 LiNO Inorganic materials 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
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- Lasers (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
An optical parametric amplification device includes an amplification element composed of a nonlinear crystal. The laser is used as a signal light source and a pumping light source, and the same synchronous controller is arranged. Pump light GpLight intensity ofpGreater than signal light GsLight intensity ofs. Pump light GqWavelength λ ofpLess than signal light GsWavelength λ ofs. Signal light GsOptical axis O1O1Perpendicular to the incident surface of the amplifying element and coupled with the pump light GpOptical axis O of2O2There is an angle alpha different from 0. Signal light GsThe phase matching angle θ ≠ 0 between the propagation direction in the amplifying element and the direction of the crystal optical axis constituting the amplifying element. The amplifier of the invention can make the weak signal light GsLight intensity IsThe amplification is more than 1 thousand times.
Description
Technical field:
The present invention is a kind of optical parametric amplifier.Be mainly used to amplify the light intensity of weak optical signal.
Background technology:
Britain I.N. Luo Si people such as (I.N.Ross) has discussed amplification process and the theory about optical parameter in the prior art in " optical parameter chirped pulse amplification principle and feasibility " (Principles and possibilities for optical parameteric chirped pulse amplifies) literary composition, but the device of the higher practicality of a kind of enlargement ratio is not provided.
Summary of the invention:
The purpose of this invention is to provide a kind of optical parametric amplifier that the light intensity of weak laser signal light can be amplified.And using of the present invention simple in structurely, maneuverable amplifying device will obtain the flashlight of desired amplification light intensity.
Optical parametric amplifier of the present invention as shown in Figure 1, comprises that most crucial element is an amplifier element 4, places the plane of incidence r of amplifier element 4 before signal optical source 1 and pump light source 2 to be arranged, and signal optical source 1 and pump light source 2 are connected with same isochronous controller 3.Place the exit facet C of amplifier element 4 to have the output of first detector 5 and second detector, 6, the first detectors 5 and second detector 6 to be connected to simultaneously on the data processing display 7 afterwards.
Said signal optical source 1 and pump light source 2 are both and constitute with laser.The pump light G of pump light source 2 emissions
pWavelength X
pFlashlight G less than signal optical source 1 emission
sWavelength X
s, i.e. λ
p＜λ
sAnd pump light G
pLight intensity I
pMust be greater than flashlight G
sLight intensity I
s, i.e. I
p＞I
s
Pump light G
pWith flashlight G
sBy isochronous controller 3 controls, must enter into simultaneously in the amplifier element 4.Flashlight G
sOptical axis O
1O
1Perpendicular to the plane of incidence r of amplifier element 4, and pump light G
pOptical axis O
2O
2With flashlight G
sOptical axis O
1O
1Between have and be not equal to 0 angle α, i.e. α ≠ 0.
Said amplifier element 4 is made of nonlinear crystal.Nonlinear crystal is a biaxial crystal, potassium titanyl oxygenic phosphate(KTP) crystal (KTP), or lithium triborate crystal in this way (LBO); Or uniaxial negative crystal, PDP crystal (KDP), or ammonium dihydrogen phosphate crystal in this way (ADP), or lithium columbate crystal (LiNO
3), or beta-barium metaborate crystal (BBO) etc.; Or positive uniaxial crystal, cadmium germanium arsenic crystal (CdGeAs in this way
2) etc.
In the amplifying device of the present invention, require to incide the flashlight G in the amplifier element 4
sThe direction of propagation and constitute phase matching angle θ ≠ 0 between the optical axis of crystal direction of amplifier element 4.
The laser of said formation signal optical source 1 and pump light source 2 is solid state lasers, or gas laser, or liquid laser.
Said first detector 5 and second detector 6 all are CCD diode array detectors, or photodiode, or photomultiplier.
Said data processing display 7 is oscilloscopes, or computer, or operative installations.Said isochronous controller 3 is made of delayer.
The course of work of amplifying device of the present invention is: as the two-beam flashlight G that is launched by the signal optical source 1 and the pump light source 2 of isochronous controller 3 controls
sWith pump light G
pIncide simultaneously in the amplifier element 4,, make flashlight G owing to constitute the coupling effect of the nonlinear crystal of amplifier element 4
sAmplify, by the two-beam of amplifier element 4 outputs, a branch of flashlight G that only is exaggerated
s', another Shu Guang is called idle light G
i
Flashlight G
sGain amplifier in amplifier element 4 is:
Wherein
L is the crystal amplification length as amplifier element 4, and Δ k is the phase misalignment harmonic quantity.Wherein amplification coefficient γ is:
(2) d in the formula
EffAs the crystal effective nonlinear coefficient of amplifier element 4, I
pBe pump light G
pIntensity, ε
0Be permittivity of vacuum, n
pBe pump light G
pRefractive index, n
sBe flashlight G
sRefractive index, n
iBe idle light G
iRefractive index, c is the light velocity, λ
sBe flashlight G
sWavelength, λ
iBe idle light G
iWavelength.
When light is propagated in the crystal as amplifier element 4, when forming different direction propagation with optical axis different refractive indexes is arranged, the relation of phase matching angle and refractive index physical quantity is as follows
In the formula, α is flashlight G
sOptical axis O
1O
1With pump light G
pOptical axis O
2O
2Between angle, θ is the phase matching angle of the light beam direction of propagation and optical axis of crystal in crystal.
By above-mentioned structure and (1), (2), (3) formula as can be seen the structure of amplifying device of the present invention be not only simply but also reasonable.
The advantage of optical parametric amplifier of the present invention:
1. use amplifying device of the present invention can realize weak signal light G
sLight intensity amplify.And enlargement ratio is above 1,000 times.
2. at the outside flashlight G that adjusts of the crystal of amplifier element 4
sWith pump light G
pTwo optical axis O
1O
1With O
2O
2Between angle α operate easily, and whole amplifying device is simple in structure, and is easy to operate.
3. the suitable kind of amplifier element 4 (nonlinear crystal) is more, aforesaid BBO, KDP, LBO, crystal such as KTP.
4. be applicable to broad wavestrip weak signal light G
sAmplification, that is to say the applied widely of signal optical source 1.
5. can select for use the kind of the laser that constitutes signal optical source 1 and pump light source 2 many, as solid state laser, liquid laser, gas laser etc.
Description of drawings:
Fig. 1 is the schematic diagram of optical parametric amplifier of the present invention.
Fig. 2 be embodiment in optical parametric amplifier of the present invention, when amplifier element 4 is uniaxial negative crystal KDP, two-beam G
p, G
sWhen inciding amplifier element 4 plane of incidence γ, the same O of two-beam axle
1O
1With O
2O
2Between angle α and the graph of relation of the gain G of amplifier element 4.
Embodiment:
Device as shown in Figure 1, signal optical source 1 are the ti sapphire laser output wavelength λ with argon (Ar) ion gas laser pumping solid
sThe flashlight G of=800nm～1.16 μ m
sPump light G
pBe that yttrium-aluminium-garnet (YAG) solid state laser is through frequency multiplication output wavelength λ
p=532nm, two pulse delay units of isochronous controller 3 usefulness constitute adjustment flashlight G
sWith pump light G
pSynchronously, pump light G
pLight intensity I
p=380MW/cm
2, amplifier element 4 is negative single shaft KDP nonlinear crystal (length L=13mm), flashlight G
sWavelength X
s=1.06 μ m, flashlight G
sWith pump light G
pTwo optical axis O
1O
1With O
2O
2Angle α=0.0034rad, curve 1 as shown in Figure 2.θ=37 °, flashlight G
sENERGY E
s=200pJ, the spot diameter that arrives the nonlinear crystal of amplifier element 4 is 1mm, pulsewidth 200ps, amplification coefficient γ=3.297 * 10
2, gain G=1.32 * 10
3, amplifying signal light G
s' energy
Obviously the flashlight G that is exaggerated
s' be original flashlight G
sMore than 1,000 times.The a value that shows among Fig. 2 is angle α value, is respectively α=a=0.0034rad, α=a=0.00618rad, α=a=0.018rad, α=a=0.034rad, α=a=0.0618rad, α=a=0.18rad, they are corresponding curve 1,2,3,4,5,6 respectively.As seen from Figure 2, different angle α obtain the gain G difference, and the gain that curve 1 obtains is preferably the highest, as above-mentioned, and the amplifying signal light G that obtains
s' ENERGY E
s *Also maximum.
Claims (5)
1. an optical parametric amplifier comprises
＜1〉plane of incidence (r) in amplifier element (4) is equipped with both before and is connected to signal optical source (1) and pump light source (2) on the same isochronous controller (3) simultaneously, exit facet (c) in amplifier element (4) is equipped with both afterwards and is connected to first detector (5) and second detector (6) on the data processing display (7) simultaneously
It is characterized in that:
＜2〉place amplifier element (4) plane of incidence (r) signal optical source (1) and pump light source (2) before to be both with laser and to constitute the pump light (G of pump light source (2) emission
p) wavelength X
pFlashlight (G less than signal optical source (1) emission
s) wavelength X
s, i.e. λ
p＜λ
s, and pump light (G
p) light intensity I
pGreater than flashlight (G
s) light intensity I
s, i.e. I
p＞I
s
＜3〉with pump light G
pIncide the flashlight G in the amplifier element (4) simultaneously
sOptical axis O
1O
1Perpendicular to the plane of incidence (r) of amplifier element (4), pump light (G
p) optical axis (O
2O
2) and flashlight (G
s) optical axis (O
1O
1) between angle 0＜a＜pi/2 is arranged;
＜4〉amplifier element (4) is made of nonlinear crystal, between the direction of propagation of inciding the flashlight (Gs) in the amplifier element (4) and the optical axis of crystal direction of formation amplifier element (4) phase matching angle θ ≠ 0 is arranged.
2. optical parametric amplifier according to claim 1 is characterized in that the nonlinear crystal of said formation amplifier element (4) is a biaxial crystal, potassium titanyl oxygenic phosphate(KTP) crystal (KTP), or lithium triborate crystal in this way (LBO); Or uniaxial negative crystal, PDP crystal (KDP), or ammonium dihydrogen phosphate crystal in this way (ADP); Or beta-barium metaborate crystal (BBO); Or positive uniaxial crystal, as cadmium germanium arsenic crystal (CdGeAs
2).
3. optical parametric amplifier according to claim 1 is characterized in that the laser of said formation signal optical source (1) and pump light source (2) is a solid state laser, or gas laser, or liquid laser.
4. optical parametric amplifier according to claim 1 is characterized in that said first detector (5) and second detector (6) are CCD diode array detectors, or photodiode, or photomultiplier.
5. optical parametric amplifier according to claim 1 is characterized in that said data processing display (7) is an oscilloscope, or computer, or operative installations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99124198 CN1108010C (en) | 1999-12-02 | 1999-12-02 | Optical parametric amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99124198 CN1108010C (en) | 1999-12-02 | 1999-12-02 | Optical parametric amplifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1258016A CN1258016A (en) | 2000-06-28 |
| CN1108010C true CN1108010C (en) | 2003-05-07 |
Family
ID=5283285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99124198 Expired - Fee Related CN1108010C (en) | 1999-12-02 | 1999-12-02 | Optical parametric amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1108010C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101191970B (en) * | 2006-11-20 | 2010-06-23 | 中国科学院西安光学精密机械研究所 | Ultrafast light parameter image amplification method and its equipment |
| CN100428042C (en) * | 2007-07-18 | 2008-10-22 | 中国科学院上海光学精密机械研究所 | Optical parametric amplification wavelength tuning device based on periodically polarized crystal |
| CN102566198B (en) * | 2012-03-08 | 2014-08-06 | 中国科学院西安光学精密机械研究所 | Device and method for amplifying terahertz (THz) wave optical parameters |
| CN116609984B (en) * | 2023-07-20 | 2023-09-15 | 中国船舶集团有限公司第七〇七研究所 | Feedback regulation type quantum light source for quantum fiber optic gyroscope |
-
1999
- 1999-12-02 CN CN 99124198 patent/CN1108010C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1258016A (en) | 2000-06-28 |
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