CN100428042C - Optical parametric amplification wavelength tuning device based on periodically polarized crystal - Google Patents
Optical parametric amplification wavelength tuning device based on periodically polarized crystal Download PDFInfo
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- CN100428042C CN100428042C CNB2007100439292A CN200710043929A CN100428042C CN 100428042 C CN100428042 C CN 100428042C CN B2007100439292 A CNB2007100439292 A CN B2007100439292A CN 200710043929 A CN200710043929 A CN 200710043929A CN 100428042 C CN100428042 C CN 100428042C
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- China
- Prior art keywords
- crystal
- ppln crystal
- pump light
- temperature control
- flashlight
- Prior art date
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- 239000013078 crystal Substances 0.000 title claims abstract description 72
- 230000003287 optical effect Effects 0.000 title claims abstract description 27
- 230000003321 amplification Effects 0.000 title claims abstract description 17
- 238000003199 nucleic acid amplification method Methods 0.000 title claims abstract description 17
- 230000000737 periodic effect Effects 0.000 claims abstract description 13
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 2
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 description 3
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 235000019837 monoammonium phosphate Nutrition 0.000 description 3
- 230000003595 spectral effect Effects 0.000 description 3
- 229910013641 LiNbO 3 Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 235000019796 monopotassium phosphate Nutrition 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- PILOURHZNVHRME-UHFFFAOYSA-N [Na].[Ba] Chemical compound [Na].[Ba] PILOURHZNVHRME-UHFFFAOYSA-N 0.000 description 1
- QBLDFAIABQKINO-UHFFFAOYSA-N barium borate Chemical compound [Ba+2].[O-]B=O.[O-]B=O QBLDFAIABQKINO-UHFFFAOYSA-N 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910000402 monopotassium phosphate Inorganic materials 0.000 description 1
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- RIUWBIIVUYSTCN-UHFFFAOYSA-N trilithium borate Chemical class [Li+].[Li+].[Li+].[O-]B([O-])[O-] RIUWBIIVUYSTCN-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
An optical parametric amplification wavelength tuning device based on a periodically poled crystal, comprising: YAG pump light laser, BBO frequency doubling crystal, broadband signal light laser, micro shifter, total reflector, lens, PPLN crystal and temperature control system, the angle of incidence into the periodic polarized crystal is changed by the micro shifter attached to the total reflector, so as to change the non-collinear included angle, and the broadband signal light generates optical parameter amplification output under different wavelengths at different angles to realize rapid and continuous wavelength tuning in a larger wavelength range of an infrared region. The invention has the characteristics of simple method, wide wavelength application range and high tuning speed.
Description
Technical field
The present invention relates to optical parameter amplifying laser system, particularly a kind of optical parameter amplification wave length tuning device based on periodic polarized crystal, this device all possess super wide wavelength tuning range with the communication band 1300nm and the 1500nm place that are worth having usury.
Background technology
Produce the wavelength tuning of (being designated hereinafter simply as OPG), optical parameter amplification (being designated hereinafter simply as OPA) and optical parametric oscillator (being designated hereinafter simply as OPO) based on optical parameter, explored multiple structure in the world, bigger, spectrum line width and evenly tuning to obtain tuning range, pumping source is various Solid State Lasers and harmonic wave thereof, and tuning manner has temperature, angle and electro-optical tuning etc.Wherein the speed of thermal tuning is slow, and the device complexity of electro-optical tuning is with high costs.The practical operation difficulty of angle tuning is big, needs further to improve precision.Used nonlinear crystal has KDP (KH
2PO
4, potassium dihydrogen phosphate), ADP (NH
4H
2PO
4, ammonium dihydrogen phosphate (ADP)), LiNbO
3(lithium niobate) and BNN (Ba
2NaNb
5O
15, barium sodium niobate (BNN)) etc., reason silence such as this stage has been set up perfect parametric interaction theory in theory, but because used these crystal or nonlinear factor is little, or the physical and chemical performance instability, and damage threshold is low very long one period.After the eighties, with KTP (KTiOPO
4, KTP), BBO (β-BaB
2O
4, barium metaborate), LBO (LiB
3O
5, three lithium borates) etc. be the appearance of the nonlinear crystal of some function admirables of representative to make this aspect research obtain important breakthrough, tunable technology visible and near, middle-infrared band has appearred.80 year middle and later periods, people begun one's study transparent scope wideer, can mate the longer parametric oscillation crystal of wavelength, these crystal comprise the isomorphism crystal RTA (RbTiOAsO of KTP
4), KTA (KTiOAsO
4) and CTA (CsTiOAsO
4) etc., printing opacity is to far crystal AgGaSe in addition
2, AgGaS
2, CdGeAs
2, ZnGeP
2Deng the development also very fast, these crystal succeed in developing in further the developing, the far infrared tuning range.Current optical parameter amplifies constantly and develops to high repetition frequency and even continuous psec, femtosecond outbound course, and the optical super lattice material that develops rapidly in recent years is as PPLN (periodically poled LiNbO
3, periodic polarized lithium columbate crystal), for people have presented a kind of brand-new accurate phase matching optical parametric oscillation theory.
The polarization cycle of periodic polarized crystal can be processed into needed any length, thereby satisfies the accurate phase-matching condition at required wave band, thus make infrared band OPA tuning become feasible.
Summary of the invention
Characteristics such as purpose of the present invention is intended to provide a kind of optical parameter amplification wave length tuning device based on periodic polarized crystal at communication band, and this device should have simple in structure, and wavelength is applied widely, and tuned speed is fast.
The present invention utilizes the angle tuning mode that constantly changes the non-linear angle of flashlight and pump light to be implemented in 1300nm or the quick continuous OPA wavelength tuning of 1500nm wave band.
Technical solution of the present invention is as follows:
A kind of optical parameter amplification wave length tuning device based on periodic polarized crystal, it comprises: Nd:YAG pump light laser instrument, BBO frequency-doubling crystal, broadband signal light laser, micro positioner, completely reflecting mirror, lens, PPLN crystal and temperature control system, and its position relation is as follows:
The pump light that Nd:YAG pump light laser instrument is produced is injected described PPLN crystal through the pump light of BBO frequency-doubling crystal frequency multiplication, after the flashlight that the broadband signal light laser produces reflects through completely reflecting mirror, be refracted into the PPLN crystal by described lens, this flashlight and described pump light incide with a non-colinear angle three wave mixings take place in the described PPLN crystal, described micro positioner and completely reflecting mirror tightly join, the vibration of micro positioner drives completely reflecting mirror in the displacement of flashlight optical path direction, the incident end face of described PPLN crystal is positioned at the back focal plane of described lens, and the described PPLN crystal of described temperature control system hard-pressed bale is also controlled its temperature.
Described completely reflecting mirror and lens have described flashlight highly reflecting films, and the plane of incidence of described BBO frequency-doubling crystal has the pump light anti-reflection film.
Frequency when described micro positioner displacement is 10mm is 400Hz.
Described PPLN crystal is pure PPLN crystal or the PPLN crystal of mixing MgO.After adopting the PPLN crystal of doped with Mg O, damage threshold can be promoted to 30MW/cm
2
The average power 2W of described Nd:YAG pump light laser instrument, pulse width 6ps, severe frequency 76MHz.
The average power 1mW of described broadband signal light laser, spectral width is greater than 200nm.
Described temperature control system is water cooling plant and sensor and the temperature control circuit that comprises hard-pressed bale PPLN crystal, and this system can keep ± 0.1 ℃ precision in 0-50 ℃ of scope.
The periodic polarized length of described PPLN crystal is by selected flashlight wave band, is issued to the tuning optimum value of quick OPA by changing in smaller angle of phase matching Curve selection.
The present invention has the following advantages:
1. owing to adopt quasi-phase matching, this device is applicable in the very wide wavelength coverage of infrared region: realization is tuning in the 1-3 μ m.
2. can optimize the tuning of different-waveband by selecting the difference polarization Cycle Length of PPLN crystal.1300nm and 1500nm wave band as the communication window place
3. whole device all solidifies, and is simple in structure, operates simple and easy.
4. owing to adopt the high nonlinear coefficient of PPLN crystal, make optical parameter gain amplifier height, loss is low.
Description of drawings
Fig. 1 is the structural representation that the present invention is based on the optical parameter amplification wave length tuning device of periodic polarized crystal.
Embodiment
See also Fig. 1 earlier, Fig. 1 is the structural representation that the present invention is based on the optical parameter amplification wave length tuning device of periodic polarized crystal.As seen from the figure, the present invention is based on the optical parameter amplification wave length tuning device of periodic polarized crystal, comprise: Nd:YAG pump light laser instrument 1, BBO frequency-doubling crystal 2, broadband signal light laser 3, micro positioner 4, completely reflecting mirror 5, lens 6, PPLN crystal 7 and temperature control system 8, the position relation of above-mentioned component is as follows:
1064nm pump light process BBO frequency-doubling crystal 2 frequencys multiplication that Nd:YAG pump light laser instrument 1 is produced are that the pump light of 532 nm is injected described PPLN crystal 7, after the flashlight that described broadband signal light laser 3 produces reflects through completely reflecting mirror 5, be refracted into PPLN crystal 7 by described lens 6, incide this flashlight and described pump light non-colinear three wave mixings take place in the described PPLN crystal 7, described micro positioner 4 tightly joins with completely reflecting mirror 5, the vibration of micro positioner 4 drives completely reflecting mirror 5 in the displacement of flashlight optical path direction, the incident end face of described PPLN crystal 7 is positioned at the back focal plane of described lens 6, and the described PPLN crystal 7 of described temperature control system 8 hard-pressed bales is also controlled its temperature.
Described completely reflecting mirror 5 has described flashlight highly reflecting films, and described lens 6 have the anti-reflection film to described flashlight, and the plane of incidence of described BBO frequency-doubling crystal 2 has the anti-reflection film to pump light.
Frequency when described micro positioner 4 displacements are 10mm is 400Hz.
The average power 2W of described Nd:YAG pump light laser instrument 1, pulse width 6ps, severe frequency 76MHz.
The flashlight spectrum of described broadband signal light laser output is at 1300nm or 1500nm place, and spectral width is greater than 200nm.
Frequency when described micro positioner displacement is 10mm is 400Hz.
The periodic polarized length of described PPLN crystal is by selected flashlight wave band, is issued to the tuning optimum value of quick OPA by can changing in smaller angle of phase matching Curve selection.Because adopt the PPLN crystal that has mixed MgO, damage threshold is promoted to 30MW/cm
2
Described temperature control system is water cooling plant and sensor and the temperature control circuit that comprises hard-pressed bale PPLN crystal, and this system can keep ± 0.1 ℃ precision in 0-50 ℃ of scope.
The course of work of fast optical parameter amplification wave length tuning device of the present invention is, at the phase-matching condition that draws under the accurate phase-matching condition under the PPLN crystal different cycles length, find out optimum value according to the non-colinear matching way of the wavelength of flashlight laser instrument and flashlight, pump light.And fix the non-colinear angular range that satisfies the OPA wavelength tuning range under this PPLN crystal condition thus, making the angle between the flashlight that is produced and produced via 532nm pump light after the described bbo crystal frequency multiplication and described broadband signal light laser by described Nd:YAG pump light laser instrument that incides the PPLN plane of crystal is the center of this non-colinear angular range, and the position of setting the vibratory output size of micro positioner and lens then is with definite rotational angle range.Need the design temperature controller to control the running of water-cooling system in the experiment, make tuningly not to be subjected to Temperature Influence and to produce error.
The parameter of lifting a specific embodiment below is described below:
The pumping light wavelength is 532nm, and repetition frequency is 76MHz, average power 2W, and pulse width is 6ps, and the spot radius that incides the PPLN plane of crystal is 160 μ m, and power density is 10.9MW/cm
2The spectral range of flashlight is 1200nm-1400nm, and non-linear angle is 3.7 °; The focal length of lens is 10mm, and the variation range of non-colinear angle is ± 1.1 °; The period polarized length of PPLN crystal 7 is 6.7 μ m; Temperature control system 8 is set at 24 ℃.Obtained the OPA at the 1200nm-1400nm wave band, the enlargement factor of flashlight is greater than 600.
Claims (5)
1, a kind of optical parameter amplification wave length tuning device based on periodic polarized crystal, it is characterized in that it comprises: Nd:YAG pump light laser instrument (1), BBO frequency-doubling crystal (2), broadband signal light laser (3), micro positioner (4), completely reflecting mirror (5), lens (6), PPLN crystal (7) and temperature control system (8), its position relation is as follows: the pump light that described Nd:YAG pump light laser instrument (1) is produced is injected described PPLN crystal (7) through BBO frequency-doubling crystal (2) frequency multiplication pump light, after the flashlight that broadband signal light laser (3) produces reflects through completely reflecting mirror (5), be refracted into PPLN crystal (7) by described lens (6), incide this flashlight and described pump light non-colinear three wave mixings take place in the described PPLN crystal (7), described micro positioner (4) and the tight connection of completely reflecting mirror (5), the vibration of micro positioner (4) drives completely reflecting mirror (5) in the displacement of flashlight optical path direction, the incident end face of described PPLN crystal (7) is positioned at the back focal plane of described lens (6), and the described PPLN crystal of described temperature control system (8) hard-pressed bale (7) is also controlled the temperature of PPLN crystal (7).
2, optical parameter amplification wave length tuning device according to claim 1, it is characterized in that described completely reflecting mirror (5) has the highly reflecting films to described flashlight, described lens (6) have the anti-reflection film to described flashlight, and the plane of incidence of described BBO frequency-doubling crystal (2) has the anti-reflection film to pump light.
3, optical parameter amplification wave length tuning device according to claim 1 is characterized in that the frequency when described micro positioner (4) displacement is 10mm is 400Hz.
4, optical parameter amplification wave length tuning device according to claim 1 is characterized in that described PPLN crystal (7) is pure PPLN crystal or the PPLN crystal of mixing MgO.
5, optical parameter amplification wave length tuning device according to claim 1, it is characterized in that described temperature control system (8) comprises water cooling plant, sensor and the temperature control circuit of the described PPLN crystal of hard-pressed bale (7), the accuracy of temperature control of this temperature control system (8) is to keep ± 0.1 ℃ precision in 0-50 ℃ of scope.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100439292A CN100428042C (en) | 2007-07-18 | 2007-07-18 | Optical parametric amplification wavelength tuning device based on periodically polarized crystal |
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|---|---|---|---|
| CNB2007100439292A CN100428042C (en) | 2007-07-18 | 2007-07-18 | Optical parametric amplification wavelength tuning device based on periodically polarized crystal |
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| CN101101428A CN101101428A (en) | 2008-01-09 |
| CN100428042C true CN100428042C (en) | 2008-10-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6029283B2 (en) * | 2012-02-08 | 2016-11-24 | 株式会社アドバンテスト | Wavelength conversion device, light source device, and wavelength conversion method |
| JP2018077427A (en) * | 2016-11-11 | 2018-05-17 | 澁谷工業株式会社 | Terahertz light generator |
| JP2018091930A (en) * | 2016-11-30 | 2018-06-14 | 澁谷工業株式会社 | Terahertz light generation device |
| JP2018091931A (en) * | 2016-11-30 | 2018-06-14 | 澁谷工業株式会社 | Terahertz light generation device |
| JP6966872B2 (en) * | 2017-05-22 | 2021-11-17 | 株式会社リコー | Terahertz wave generator, inspection device |
| CN109921271A (en) * | 2017-12-13 | 2019-06-21 | 中国科学院大连化学物理研究所 | A kind of adjustable crystal thermostat of mechanical location |
| CN111834483A (en) * | 2019-04-19 | 2020-10-27 | 顾士平 | Frequency division, convergence and frequency conversion solar cell |
| WO2022104597A1 (en) * | 2020-11-18 | 2022-05-27 | 深圳大学 | Polarization-insensitive optical parametric amplifier for radially polarized light and amplification method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1258016A (en) * | 1999-12-02 | 2000-06-28 | 中国科学院上海光学精密机械研究所 | Optical parametric amplifier |
| JP2003140211A (en) * | 2001-11-02 | 2003-05-14 | Noritsu Koki Co Ltd | Laser wavelength conversion device and photograph processing device equipped with the same |
| JP2006308909A (en) * | 2005-04-28 | 2006-11-09 | Nikon Corp | Wavelength conversion optical system and laser device |
| US20070147443A1 (en) * | 2005-12-23 | 2007-06-28 | Academia Sinica | High repetition rate visible optical parametric oscillator |
-
2007
- 2007-07-18 CN CNB2007100439292A patent/CN100428042C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1258016A (en) * | 1999-12-02 | 2000-06-28 | 中国科学院上海光学精密机械研究所 | Optical parametric amplifier |
| JP2003140211A (en) * | 2001-11-02 | 2003-05-14 | Noritsu Koki Co Ltd | Laser wavelength conversion device and photograph processing device equipped with the same |
| JP2006308909A (en) * | 2005-04-28 | 2006-11-09 | Nikon Corp | Wavelength conversion optical system and laser device |
| US20070147443A1 (en) * | 2005-12-23 | 2007-06-28 | Academia Sinica | High repetition rate visible optical parametric oscillator |
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| CN101101428A (en) | 2008-01-09 |
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