CN103794293A - Terahertz parameter source based on potassium titanyl phosphate crystal and application thereof - Google Patents
Terahertz parameter source based on potassium titanyl phosphate crystal and application thereof Download PDFInfo
- Publication number
- CN103794293A CN103794293A CN201410064229.1A CN201410064229A CN103794293A CN 103794293 A CN103794293 A CN 103794293A CN 201410064229 A CN201410064229 A CN 201410064229A CN 103794293 A CN103794293 A CN 103794293A
- Authority
- CN
- China
- Prior art keywords
- terahertz
- crystal
- ktp
- phosphate
- laser
- 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.)
- Granted
Links
Images
Landscapes
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
A terahertz parameter source based on a potassium titanyl phosphate crystal comprises a laser pumping system, a terahertz parametric device and a cooling system. The terahertz parametric device comprises the potassium titanyl phosphate crystal, pumping lasers emitted by the laser pumping system irradiate along the terahertz parametric device, and a terahertz parametric source is formed by a stimulated exciton scattering process of the potassium titanyl phosphate crystal. The output frequency range of terahertz waves is 3.17-6.13THz. The terahertz parametric device further comprises a rear cavity mirror and an output mirror, and the lasers emitted by the laser pumping system are emitted out through the rear cavity mirror, the potassium titanyl phosphate crystal and the output mirror in sequence. According to the terahertz parameter source based on the potassium titanyl phosphate crystal, the nonlinear crystal of potassium titanyl phosphate crystal is used, the crystal is high in nonlinear gain and high in damage threshold, and tunable terahertz radiation waves within the frequency range of 3.17THz to 6.13THz can be obtained through an angle tuning mode.
Description
Technical field
The present invention relates to a kind of Terahertz parameter source and application thereof based on potassium titanyl oxygenic phosphate(KTP) crystal, belong to the technical field in Terahertz parameter source.
Background technology
Being excited exciton scattering is a kind of important technology that produces terahertz emission, is excited that exciton scattering can obtain as seen, near-infrared, and the tunable laser of terahertz wave band by some crystal.THz source with other technologies, as the THz source of optical rectification, quantum cascade laser and electricity is compared, this based on be excited the Terahertz parameter source of exciton scattering have can encapsulation and integration, working and room temperature, easy to use, be convenient to the advantages such as tuning, line width.Terahertz parameter source is one of the study hotspot in Terahertz generation field always.Now there are the report about Terahertz parameter source in a large number, the crystal LiNbO that they all utilize both at home and abroad
3or MgO:LiNbO
3as the working media of non-linear conversion, can obtain tunable terahertz emission source in 0.6-3THz frequency range.The minimum A1 symmetric vibration mould of potassium titanyl oxygenic phosphate(KTP) crystal is 268.5cm
-1, this diaphragm has infrared and Raman active simultaneously, can obtain the tunable terahertz emission source in 3.17THz arrives 6.13THz frequency range by angle tuning, has expanded based on LiNbO
3the Terahertz frequency range in the Terahertz parameter source of crystal, does not also find the Terahertz parameter source of realizing with this crystal so far.
Summary of the invention
The invention provides a kind of Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal.The present invention utilize potassium titanyl oxygenic phosphate(KTP) crystal be excited exciton scattering process form Terahertz parameter source.
The present invention also provides the application in the above-mentioned Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal.Tunable THz wave output in 3.17-6.13THz frequency range has been realized in this Terahertz parameter source.
Technical scheme of the present invention is as follows:
A Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal, comprises laser pumping system, Terahertz parametric device and cooling system; Described Terahertz parametric device comprises potassium titanyl oxygenic phosphate(KTP) crystal, described laser pumping system send pumping laser along Terahertz parametric device irradiate, described potassium titanyl oxygenic phosphate(KTP) crystal be excited exciton scattering process form Terahertz parameter source.
Preferred according to the present invention, the THz wave reference frequency output in described Terahertz parameter source is 3.17-6.13THz.
Preferred according to the present invention, described Terahertz parametric device also comprises the Effect of Back-Cavity Mirror of Terahertz parametric device, the outgoing mirror of Terahertz parametric device, and the laser that described laser pumping system is sent penetrates successively along the outgoing mirror of Effect of Back-Cavity Mirror, potassium titanyl oxygenic phosphate(KTP) crystal and the Terahertz parametric device of Terahertz parametric device.
Preferred according to the present invention, described potassium titanyl oxygenic phosphate(KTP) crystal is nonlinear crystal potassium titanium oxide phosphate.The laser beam being produced by laser pumping system is through the nonlinear crystal potassium titanium oxide phosphate in Terahertz parametric device, described nonlinear crystal potassium titanium oxide phosphate has Raman and infrared active diaphragm, exciton scattering is excited in generation, produce non-linear parameter process, angle rotating platform by described Terahertz parametric device changes pump light and incides the angle in potassium titanium oxide phosphate, can obtain 3.17THz to the tunable Terahertz parameter source in 6.13THz frequency range.
Preferred according to the present invention, cut direction θ=90 ° of the crystal of described nonlinear crystal potassium titanium oxide phosphate, φ is arbitrarily angled, described θ is the angle of pumping laser and nonlinear crystal z axle, φ is the angle of nonlinear crystal x axle and nonlinear crystal side, the length of nonlinear crystal is l, and the width of nonlinear crystal is d.
Preferred according to the present invention, the cut direction of the crystal of described nonlinear crystal potassium titanium oxide phosphate as shown in Figure 1, x, y, z represents respectively the x axle of potassium titanyl oxygenic phosphate(KTP) crystal, y axle and z direction of principal axis, the cutting angle φ of the crystal x axle of Terahertz exit facet and nonlinear crystal potassium titanium oxide phosphate
1scope be-45 ° to-15 °.On Terahertz exit facet, there is total reflection in incident pumping laser and the Stokes light of being excited to produce in exciton scattering process, and THz wave can vertically or be bordering on perpendicular to this surface output, crystal length is l, and width is d, thickness is h, and the size of l and d meets l+d/tan φ
1<-d/tan φ
1<l, the width d of crystal and thickness h can be selected according to pump spot size.
Preferred according to the present invention, the both ends of the surface of described nonlinear crystal potassium titanium oxide phosphate are all coated with anti-reflection film.The wave-length coverage of anti-reflection film can decide according to the wavelength of the pumping source of selecting; Do polishing at THz wave exit facet.
Preferred according to the present invention, the Effect of Back-Cavity Mirror of described Terahertz parametric device is coated with the high-reflecting film at Stokes wave band.Make the plated film of the outgoing mirror of described Terahertz parametric device there is certain transmitance at Stokes wave band.
Preferred according to the present invention, cut direction θ=90 ° of the crystal of described nonlinear crystal potassium titanium oxide phosphate, the span of φ is-10 ° to+10 °, described θ is the angle of pumping laser and nonlinear crystal z axle, φ is the angle of nonlinear crystal x axle and nonlinear crystal side, the length of nonlinear crystal is l, and the width of nonlinear crystal is d; Thickness is h, crystal length l, and width d, thickness h can be selected with the area of pumping laser hot spot according to the actual requirements.
Described Terahertz parametric device also comprises THz wave coupling unit, and described THz wave coupling unit is silicon materials prisms, described silicon materials prism and nonlinear crystal seamless contact of xz face.The quantity of prism and size can determine according to the size of nonlinear crystal.
Preferred according to the present invention, the both ends of the surface of described nonlinear crystal potassium titanium oxide phosphate, yz face is all coated with anti-reflection film; Do polishing at THz wave exit facet (xz face).The wave-length coverage of described anti-reflection film can decide according to the wavelength of the pumping source of selecting.
Preferred according to the present invention, the Effect of Back-Cavity Mirror of described Terahertz parametric device is coated with the high-reflecting film at Stokes wave band.The plated film of the outgoing mirror of described Terahertz parametric device has certain transmitance at Stokes wave band.
Preferred according to the present invention, the laser system of the 1-100Hz of the low repetition of pulse laser system, flash lamp pumping or LD pumping that the continuous laser system that described laser pumping system is LD pumping, quasi-continuous repetition rate are 100Hz-100kHz; The power density that described laser pumping system provides in potassium titanium oxide phosphate nonlinear crystal is not less than 10MW/cm
2; Described cooling system is circulating water cooling system or semiconductor refrigeration system.Described circulating water---crystal on side face is all used with the metal derby of pipeline and is encased, and continues to be connected with recirculated cooling water in the pipeline of metal derby, is used for reducing temperature to crystal; Described semiconductor refrigerating---crystal on side face is surrounded by semiconductor refrigerating piece.
A kind of method of work of the Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal is as follows:
The pump light that laser pumping origin system sends enters into the potassium titanium oxide phosphate nonlinear crystal of described Terahertz parametric device, with in potassium titanyl oxygenic phosphate(KTP) crystal, there is Raman and infrared-active crystal diaphragm simultaneously and interact, exciton scattering is excited in generation, in Terahertz parametric device, form Stokes laser, produce terahertz emission ripple simultaneously, and utilize silicon prism-coupled array coupled modes or the mode of launching by vertical surface obtains terahertz emission output.
Advantage of the present invention is:
A kind of Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal of the present invention, use a kind of new nonlinear crystal potassium titanium oxide phosphate, this crystal non-linear gain is higher, there is high damage threshold simultaneously, can obtain 3.17THz to the tunable terahertz emission ripple in 6.13THz frequency range by the mode of angle tuning.
Accompanying drawing explanation
Fig. 1 is the cut direction schematic diagram of the crystal of the potassium titanium oxide phosphate of nonlinear crystal described in the present invention;
Fig. 2 is exciton dispersion curve and the non-colinear phase matched graph of a relation that in the present invention, the A1 diaphragm 268.5cm-1 based on potassium titanyl oxygenic phosphate(KTP) crystal produces;
Fig. 3 is to be the light channel structure schematic diagram in the potassium titanium oxide phosphate Terahertz parameter source of exocoel pumping of the present invention, vertical surface transmitting;
The overall dimension of nonlinear crystal potassium titanium oxide phosphate in the potassium titanium oxide phosphate Terahertz parameter source of Fig. 4 exocoel pumping of the present invention, vertical surface transmitting;
Fig. 5 is the light channel structure schematic diagram in the potassium titanium oxide phosphate Terahertz parameter source of exocoel pumping of the present invention, silicon prism array coupling output;
Fig. 6 is the q-operation of LD end pumping of the present invention, light channel structure schematic diagram inner chamber pumping, silicon prism array coupling Terahertz parameter source output, based on potassium titanyl oxygenic phosphate(KTP) crystal;
Fig. 7 is the q-operation of LD profile pump of the present invention, the light channel structure schematic diagram in potassium titanium oxide phosphate Terahertz parameter source inner chamber pumping, vertical surface transmitting;
Fig. 8 is the light channel structure schematic diagram in the potassium titanium oxide phosphate Terahertz parameter source of exocoel pumping of the present invention, silicon prism array coupling output;
Fig. 9 is the angle tuning scope in the potassium titanium oxide phosphate Terahertz parameter source of exocoel pumping of the present invention, vertical surface transmitting.
Wherein: 1. laser pumped by pulsed laser source, 2. beam expander or contracting bundle device, 3. half-wave plate, 4. the Effect of Back-Cavity Mirror of Terahertz parametric device, 5. the nonlinear crystal potassium titanium oxide phosphate of Terahertz parametric device, 6. the outgoing mirror of Terahertz parametric device, 7, angle rotating platform, 8. Terahertz silicon prism-coupled parts, 9. laser diode LD, 10. optical fiber, 11. coupled lens groups, 12. pumped laser system resonant cavity Effect of Back-Cavity Mirror, 13. cooling constant temperature systems, 14. gain mediums, 15. Q-switchs, 16. polarizers, 17. pumped laser system resonant cavity outgoing mirrors, 18.LD side pumping module.
Embodiment
Now for Figure of description and embodiment, the present invention is described in detail, but is not limited to this.
According to the present invention, as shown in Figure 2, being excited exciton scattering process is the horizontal A1 diaphragm (TO) based on crystal, when laser incides in ktp crystal, is coupled with the A1 diaphragm of crystal, produces polariton.Polariton not only has electromagnetic property but also have mechanical vibration performance, in the time of extraneous optical excitation, cashes out electromagnetic property, outwards radiated electromagnetic wave, and frequency is positioned at terahertz wave band, produces terahertz emission.Because laterally A1 diaphragm has infrared and Raman active simultaneously, second order and third-order non-linear process are comprised so be excited exciton scattering process.In this process, need to meet phase-matching condition, Fig. 2 is the dispersion curve of polariton in ktp crystal, and the difference of the phase matched angle θ in crystal according to pump light and Stokes light can obtain the terahertz emission of different frequency.
A Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal, comprises laser pumping system, Terahertz parametric device and cooling system; Described Terahertz parametric device comprises potassium titanyl oxygenic phosphate(KTP) crystal, described laser pumping system send pumping laser along Terahertz parametric device irradiate, described potassium titanyl oxygenic phosphate(KTP) crystal be excited exciton scattering process form Terahertz parameter source.
The THz wave reference frequency output in described Terahertz parameter source is 3.17-6.13THz.
Described Terahertz parametric device also comprises the Effect of Back-Cavity Mirror of Terahertz parametric device, the outgoing mirror of Terahertz parametric device, and the laser that described laser pumping system is sent penetrates successively along the outgoing mirror of Effect of Back-Cavity Mirror, potassium titanyl oxygenic phosphate(KTP) crystal and the Terahertz parametric device of Terahertz parametric device.
Described potassium titanyl oxygenic phosphate(KTP) crystal is nonlinear crystal potassium titanium oxide phosphate.The laser beam being produced by laser pumping system is through the nonlinear crystal potassium titanium oxide phosphate in Terahertz parametric device, described nonlinear crystal potassium titanium oxide phosphate has Raman and infrared active diaphragm, exciton scattering is excited in generation, produce non-linear parameter process, angle rotating platform by described Terahertz parametric device changes pump light and incides the angle in potassium titanium oxide phosphate, can obtain 3.17THz to the tunable Terahertz parameter source in 6.13THz frequency range.
Cut direction θ=90 ° of the crystal of described nonlinear crystal potassium titanium oxide phosphate, φ is arbitrarily angled, described θ is the angle of pumping laser and nonlinear crystal z axle, φ is the angle of nonlinear crystal x axle and nonlinear crystal side, the length of nonlinear crystal is l, and the width of nonlinear crystal is d.
The cut direction of the crystal of described nonlinear crystal potassium titanium oxide phosphate as shown in Figure 1, x, y, z represents respectively the x axle of potassium titanyl oxygenic phosphate(KTP) crystal, y axle and z direction of principal axis, the cutting angle φ of the crystal x axle of Terahertz exit facet and nonlinear crystal potassium titanium oxide phosphate
1scope be-45 ° to-15 °.On Terahertz exit facet, there is total reflection in incident pumping laser and the Stokes light of being excited to produce in exciton scattering process, and THz wave can vertically or be bordering on perpendicular to this surface output, crystal length is l, and width is d, thickness is h, and the size of l and d meets l+d/tan φ
1<-d/tan φ
1<l, the width d of crystal and thickness h can be selected according to pump spot size.
The both ends of the surface of described nonlinear crystal potassium titanium oxide phosphate are all coated with anti-reflection film.The wave-length coverage of anti-reflection film can decide according to the wavelength of the pumping source of selecting; Do polishing at THz wave exit facet.
The Effect of Back-Cavity Mirror of described Terahertz parametric device is coated with the high-reflecting film at Stokes wave band.Make the plated film of the outgoing mirror of described Terahertz parametric device there is certain transmitance at Stokes wave band.
Below in conjunction with accompanying drawing 3, the present embodiment is described in detail: as shown in Figure 3, a kind of Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal comprises laser pumped by pulsed laser source 1, beam expander or contracting bundle device 2, the polarization state of pumping laser adjusted by half-wave plate 3 and the z axle of nonlinear crystal potassium titanium oxide phosphate 5 is parallel, Terahertz parametric device Effect of Back-Cavity Mirror 4 and Terahertz parametric device outgoing mirror 6 form the resonant cavity of tera-hertz parametric oscillator, and be jointly fixed on angle rotating platform 7 with nonlinear crystal potassium titanium oxide phosphate 5, form Terahertz parametric device; The pumping source system in laser pumped by pulsed laser source 1, beam expander or contracting bundle device 2 and the common composition of half-wave plate 3 Terahertz parameter source.
A kind of method of work of the Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal is as follows: the laser that send in laser pumped by pulsed laser source 1 is adjusted laser facula size by beam expander or contracting bundle device 2, then after adjusting polarization state by half-wave plate 8, enter in Terahertz parametric device, because the A1 diaphragm 268.5cm-1 of potassium titanyl oxygenic phosphate(KTP) crystal wherein has Raman and infrared active simultaneously, thereby can produce and be excited exciton scattering, produce Stokes light, the position generation Terahertz output of total reflection occurs at Stokes simultaneously.Potassium titanyl oxygenic phosphate(KTP) crystal 5, as nonlinear dielectric, can effectively produce Stokes and Terahertz conversion, changes the incident angle of incident light, i.e. pump light and the angle θ of Stokes light outside potassium titanyl oxygenic phosphate(KTP) crystal by anglec of rotation rotating platform
ext, can obtain the tunable Terahertz output within the scope of 3.17-6.13THz.
The Nd:YAG adjusting Q pulse laser that described laser pumped by pulsed laser source 1 is flash lamp pumping or LD pumping, wavelength is 1064.2nm, and repetition rate is the adjustable ns level pulse laser of 1-100Hz, and maximum pump energy is 1J, and pulse duration is 8ns.
Described nonlinear crystal potassium titanium oxide phosphate 5, the cutting method of described nonlinear crystal as shown in Figure 4, x, y, z is the x axle of crystal, y axle, z direction of principal axis, cut direction θ=90 °, φ=-28 °, described θ is the angle of pumping laser and nonlinear crystal z axle, φ is the angle of nonlinear crystal x axle and nonlinear crystal side, nonlinear crystal is l=30mm along x shaft length, be d=17mm along the length of y axle, be 8mm along the thickness of z axle, the size cut direction of described nonlinear crystal is not limited to this, φ can be arbitrarily angled, the size of crystal can be come to determine as required.
The both ends of the surface of described nonlinear crystal potassium titanium oxide phosphate 5 are all coated with the anti-reflection film of 1000nm-1100nm wavelength, side polishing.
The terahertz emission wave frequency of described Terahertz parameter source output is tunable, is 1.5-6.0 °, to obtain tuning range as 3.17-6.13THz by adjusting pump light and the shooting angle scope of Stokes laser outside nonlinear crystal.Described Stokes laser is to be excited the light beam close with pump light frequency that produce in exciton scattering process.
The Effect of Back-Cavity Mirror 4 of described Terahertz parametric device is coated with the anti-reflection film of pump light wave band and the high-reflecting film of 1000nm-1100nm wave band; Outgoing mirror 5 is coated with transmittance at 1000-1100nm wave band.High-reflecting film described herein, its reflectivity is greater than 95%, and transmittance scope described herein is 0.01%～99.99%.
Described cooling system is circulating water---crystal on side face is all used with the metal derby of pipeline and is encased, and continues to be connected with recirculated cooling water in the pipeline of metal derby, is used for reducing temperature to crystal.
Workflow: it is 2.5mm that the 1064.2nm laser that Nd:YAG adjusting Q pulse laser pumping source 1 sends is adjusted laser spot diameter by beam expander or contracting bundle device 2, then adjust by half-wave plate 8 the z axle that laser polarization state is parallel to potassium titanyl oxygenic phosphate(KTP) crystal, enter in Terahertz parametric device, because the A1 diaphragm 268.5cm-1 of potassium titanyl oxygenic phosphate(KTP) crystal has Raman and infrared active simultaneously, thereby can produce and be excited exciton scattering, produce near the Stokes light of 1080nm, the position generation Terahertz output of total reflection occurs at Stokes simultaneously.Potassium titanyl oxygenic phosphate(KTP) crystal 5, as nonlinear dielectric, can effectively produce Stokes and Terahertz conversion, changes the incident angle of incident light, i.e. pump light and the angle θ of Stokes light outside potassium titanyl oxygenic phosphate(KTP) crystal by anglec of rotation rotating platform
ext, can obtain the tunable Terahertz output within the scope of 3.17-6.13THz.In the time that pump energy is 80mJ, the maximum Terahertz output of acquisition is about 350nJ.
As shown in Figure 5.
A Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal, comprises laser pumping system, Terahertz parametric device and cooling system; Described Terahertz parametric device comprises potassium titanyl oxygenic phosphate(KTP) crystal, described laser pumping system send pumping laser along Terahertz parametric device irradiate, described potassium titanyl oxygenic phosphate(KTP) crystal be excited exciton scattering process form Terahertz parameter source.
The THz wave reference frequency output in described Terahertz parameter source is 3.17-6.13THz.
Described Terahertz parametric device also comprises the Effect of Back-Cavity Mirror of Terahertz parametric device, the outgoing mirror of Terahertz parametric device, and the laser that described laser pumping system is sent penetrates successively along the outgoing mirror of Effect of Back-Cavity Mirror, potassium titanyl oxygenic phosphate(KTP) crystal and the Terahertz parametric device of Terahertz parametric device.Described potassium titanyl oxygenic phosphate(KTP) crystal is nonlinear crystal potassium titanium oxide phosphate.
Cut direction θ=90 ° of the crystal of described nonlinear crystal potassium titanium oxide phosphate, the span of φ is-10 ° to+10 °, described θ is the angle of pumping laser and nonlinear crystal z axle, φ is the angle of nonlinear crystal x axle and nonlinear crystal side, the length of nonlinear crystal is l, and the width of nonlinear crystal is d; Thickness is h, crystal length l, and width d, thickness h can be selected with the area of pumping laser hot spot according to the actual requirements.
Described Terahertz parametric device also comprises THz wave coupling unit, and described THz wave coupling unit is silicon materials prisms, described silicon materials prism and nonlinear crystal seamless contact of xz face.The quantity of prism and size can determine according to the size of nonlinear crystal.
The both ends of the surface of described nonlinear crystal potassium titanium oxide phosphate, yz face is all coated with anti-reflection film; Do polishing at THz wave exit facet (xz face).The wave-length coverage of described anti-reflection film can decide according to the wavelength of the pumping source of selecting.
The Effect of Back-Cavity Mirror of described Terahertz parametric device is coated with the high-reflecting film at Stokes wave band.The plated film of the outgoing mirror of described Terahertz parametric device has certain transmitance at Stokes wave band.
Below in conjunction with accompanying drawing 5, the present embodiment is described in detail:
As shown in Figure 5, a kind of Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal comprises the ns level pulse laser of the 1-100Hz of the low repetition of the 1(flash lamp pumping of laser pumped by pulsed laser source or LD pumping), beam expander or contracting bundle device 2, the polarization state of pumping laser adjusted by half-wave plate 3 and the z axle of nonlinear crystal potassium titanium oxide phosphate 5 is parallel, Effect of Back-Cavity Mirror 4 and the outgoing mirror 6 of Terahertz parametric device forms the resonant cavity of Terahertz parametric device, and be jointly fixed on angle rotating platform 7 with nonlinear crystal potassium titanium oxide phosphate 5 and Terahertz silicon prism-coupled parts 8, form Terahertz parametric device, nonlinear crystal potassium titanium oxide phosphate 5 contacts with the zox face gapless of Terahertz silicon prism-coupled parts 8, the pumping source system in impulse optical pumping source 1, beam expander or contracting bundle device 2 and the common composition of half-wave plate 3 Terahertz parameter source.A kind of method of work of the Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal is as follows: the laser that send in laser pumped by pulsed laser source 1 is adjusted laser facula size by beam expander or contracting bundle device 2, then after adjusting polarization state by half-wave plate 8, enter Terahertz parametric device, because the A1 diaphragm 268.5cm-1 of potassium titanyl oxygenic phosphate(KTP) crystal has Raman and infrared active simultaneously, thereby can produce and be excited exciton scattering, produce Stokes light, produce terahertz emission ripple simultaneously, and export by silicon prism-coupled parts 8.Potassium titanyl oxygenic phosphate(KTP) crystal 5, as nonlinear dielectric, can effectively produce Stokes and Terahertz conversion, changes the incident angle of incident light, i.e. pump light and the angle θ of Stokes light outside potassium titanyl oxygenic phosphate(KTP) crystal by anglec of rotation rotating platform
ext, can obtain the tunable Terahertz output within the scope of 3.17-6.13THz.
The Nd:YAG adjusting Q pulse laser that described laser pumped by pulsed laser source 1 is flash lamp pumping or LD pumping, wavelength is 1064.2nm, and repetition rate is the adjustable ns level pulse laser of 1-100Hz, and maximum pump energy is 1J, and pulse duration is 8ns.
Described nonlinear crystal potassium titanium oxide phosphate, cut direction θ=90 ° of described nonlinear crystal, φ=0 °, described θ is the angle of pumping laser and nonlinear crystal z axle, and φ is the angle of nonlinear crystal x axle and nonlinear crystal side, and nonlinear crystal is l=50mm along x shaft length, be d=6mm along the length of y axle, be 6mm along the thickness of z axle, the size cut direction of described nonlinear crystal is not limited to this, and the size of crystal can be come to determine as required.
The both ends of the surface of described nonlinear crystal potassium titanium oxide phosphate are all coated with the anti-reflection film of 1000nm-1100nm wavelength, side polishing.
The terahertz emission wave frequency of described tera-hertz parametric oscillator output is tunable, is 1.5-6.0 °, to obtain tuning range as 3.17-6.13THz by adjusting pump light and the shooting angle scope of Stokes laser outside nonlinear crystal.Described Stokes laser is to be excited the light beam close with pump light frequency that produce in exciton scattering process.
Described Effect of Back-Cavity Mirror 4 is coated with the anti-reflection film of pump light wave band and the high-reflecting film of 1000nm-1100nm wave band; Outgoing mirror 6 is coated with transmittance at 1000-1100nm wave band.High-reflecting film described herein, its reflectivity is greater than 95%, and transmittance scope described herein is 0.01%～99.99%.
Described THz wave coupling unit 8 is coupled modes of Terahertz silicon prism array.
Described cooling system is circulating water---crystal on side face is all used with the metal derby of pipeline and is encased, and continues to be connected with recirculated cooling water in the pipeline of metal derby, is used for reducing temperature to crystal.
Workflow: it is 2.5mm that the 1064.2nm laser that Nd:YAG adjusting Q pulse laser pumping source 1 sends is adjusted laser spot diameter by beam expander or contracting bundle device 2, then adjust by half-wave plate 8 the z axle that laser polarization state is parallel to potassium titanyl oxygenic phosphate(KTP) crystal, enter in Terahertz parametric device, because the A1 diaphragm 268.5cm-1 of potassium titanyl oxygenic phosphate(KTP) crystal has Raman and infrared active simultaneously, thereby can produce and be excited exciton scattering, produce near the Stokes light of 1080nm, produce terahertz emission ripple simultaneously, and obtain output by Terahertz silicon prism array 8.Potassium titanyl oxygenic phosphate(KTP) crystal 5, as nonlinear dielectric, can effectively produce Stokes and Terahertz conversion, changes the incident angle of incident light, i.e. pump light and the angle θ of Stokes light outside potassium titanyl oxygenic phosphate(KTP) crystal by anglec of rotation rotating platform
ext, can obtain the tunable Terahertz output within the scope of 3.17-6.13THz.
As shown in Figure 6, a kind of Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal as described in Example 1, wherein Terahertz parametric device is by the Effect of Back-Cavity Mirror 4 of Terahertz parametric device, the outgoing mirror 6 of Terahertz parametric device, angle rotating platform 7, Terahertz coupling unit 8 silicon prism arrays and nonlinear crystal potassium titanium oxide phosphate 5 form, nonlinear crystal potassium titanium oxide phosphate 5 contacts with the zox face gapless of Terahertz silicon prism-coupled parts 8, the Effect of Back-Cavity Mirror 4 of Terahertz parametric device, nonlinear crystal potassium titanium oxide phosphate 5, the outgoing mirror 6 of Terahertz parametric device is fixed on angle rotating platform 7 together with Terahertz silicon prism-coupled parts 8, pumped laser system resonant cavity Effect of Back-Cavity Mirror 12, pumped laser system resonant cavity outgoing mirror 17 form pumping laser resonant cavity, placement in pumping laser resonant cavity is followed successively by gain medium 14Nd:YAG laser crystal, acousto-optic Q modulation switch 15, the polarizer 16, half-wave plate 3 and Terahertz parametric device, jointly forms the Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal.The pumped laser system in Terahertz parameter source comprises laser diode LD 9, optical fiber 10, coupled lens group 11, the gain medium 14 of placing successively in the pumping laser resonant cavity that pumped laser system resonant cavity Effect of Back-Cavity Mirror 12 and pumped laser system resonant cavity outgoing mirror 17 form and pumping laser resonant cavity forms jointly for neodymium-doped yttrium-aluminum garnet (Nd:YAG) laser crystal, Q-switch 15, the polarizer 16, half-wave plate 3.A kind of Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal is made up of the Terahertz parametric device of placing in above-mentioned pumped laser system and pumping laser resonant cavity.The working method in the Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal is as follows: the pump light being produced by LD end pumping system is coupled into gain medium 14, the fundamental frequency light producing enters into Terahertz parametric device, because the A1 oscillation mode of potassium titanyl oxygenic phosphate(KTP) crystal wherein has infrared and Raman effect simultaneously, thereby can produce and be excited exciton scattering, produce Stokes light and terahertz emission ripple, THz wave obtains output by Terahertz silicon prism-coupled parts 8.Above-mentioned Q-switch 15, gain medium 14 and nonlinear crystal potassium titanium oxide phosphate 5 all carry out temperature control by cooling constant temperature system 13, and keeping temperature is 20 ℃.
Described laser diode LD 9 end face pumping systems are to be 400 microns of near LD end pumping source (peak power 75W) 808nm and corresponding optical fiber 14(core diameters by wavelength, numerical aperture 0.22) and coupled lens group 15(1:1 imaging, operating distance 50mm) composition.
Described laser crystal Nd:YAG crystal 14 is of a size of φ 4mm × 5mm, and its doping content is the anti-reflection film (transmitance is greater than 99.8%) that two end faces of 1-at.% are all coated with 808nm and 1000nm-1100nm wavelength.
Described Q-modulating device 15 is made up of radio frequency input unit and acousto-optic adjusting Q crystal, and the length of adjusting Q crystal is 38mm, and both ends of the surface are all coated with the anti-reflection film (transmitance is greater than 99.8%) to 1000nm-1100nm wavelength; Modulating frequency is that 1-60kHz is adjustable, changes the density of adjusting Q crystal by input radio frequency ripple, sexually revises the object of laserresonator threshold value performance period, plays Q-switch effect.
Described potassium titanyl oxygenic phosphate(KTP) crystal 5 is of a size of 50 (x) × 6 (y) × 6 (z) mm
3, both ends of the surface are all coated with the anti-reflection film (transmitance is greater than 99.8%) to 1000nm-1100nm wave band, zox plane polishing processing
Described resonant cavity mirror: the Effect of Back-Cavity Mirror 4 of Terahertz parametric device, the outgoing mirror 6 of Terahertz parametric device, pumped laser system resonant cavity Effect of Back-Cavity Mirror 12, pumped laser system resonant cavity outgoing mirror 17 are all flat mirrors, is coated with the high-reflecting film (reflectivity is greater than 99.8%) of 1000nm-1100nm wavelength.
The pump light that workflow: LD sends 808nm enters neodymium-doped yttrium-aluminum garnet Nd:YAG crystal 14 through optical fiber 10 and coupled lens group 11, and in the time that acousto-optic Q modulation switch 15 cuts out, pump light transfers reversion particle to and stores; In the time that Q switching 15 is opened, a large amount of reversion particles of saving bit by bit transfer 1064.2nm fundamental frequency light to by stimulated radiation moment; The fundamental frequency light with high peak power is during through potassium titanyl oxygenic phosphate(KTP) crystal in Terahertz parametric device, due to effect generation Stokes light and the terahertz emission ripple of being excited exciton scattering, THz wave obtains output by Terahertz silicon prism-coupled parts 8, change the incident angle of incident light by anglec of rotation rotating platform, i.e. pump light and the angle θ of Stokes light outside potassium titanyl oxygenic phosphate(KTP) crystal
ext, can obtain the tunable Terahertz output within the scope of 3.17-6.13THz.
As shown in Figure 7.Wherein Terahertz parametric device is made up of the Effect of Back-Cavity Mirror 4 of Terahertz parametric device, outgoing mirror 6, nonlinear crystal potassium titanium oxide phosphate 5, angle rotating platform 7 and the cooling constant temperature system 13 of Terahertz parametric device, and the outgoing mirror 6 of the Effect of Back-Cavity Mirror 4 of Terahertz parametric device, nonlinear crystal potassium titanium oxide phosphate 5, Terahertz parametric device is fixed on angle rotating platform 7 together with cooling constant temperature system 13; Pumped laser system resonant cavity Effect of Back-Cavity Mirror 12 and pumped laser system resonant cavity outgoing mirror 17 form pumping laser resonant cavity, placement in pumping laser resonant cavity is followed successively by acousto-optic Q modulation switch 15, the polarizer 16, laser diode LD side pumping module 18, gain medium 14Nd:YAG laser crystal, half-wave plate 3 and above-mentioned Terahertz parametric device, jointly forms the Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal.The pumped laser system in Terahertz parameter source comprises that chamber mirror 12,17, acousto-optic Q modulation switch 15, the polarizer 16, laser diode LD side pumping module 18, gain medium 14Nd:YAG laser crystal and half-wave plate 3 form jointly; A kind of Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal is made up of the Terahertz parametric device of placing in above-mentioned pumped laser system and pumping laser resonant cavity.A kind of method of work of the Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal is as follows: the 808nm pump light being produced by LD profile pump system is coupled into gain medium 14, the fundamental frequency light producing enters into Terahertz parametric device, because the A1 oscillation mode of potassium titanyl oxygenic phosphate(KTP) crystal wherein has infrared and Raman effect simultaneously, thereby can produce and be excited exciton scattering, produce Stokes light, the position generation Terahertz output of total reflection occurs at Stokes simultaneously.Potassium titanyl oxygenic phosphate(KTP) crystal 5, as nonlinear dielectric, can effectively produce Stokes and Terahertz conversion, changes the incident angle of incident light, i.e. pump light and the angle θ of Stokes light outside potassium titanyl oxygenic phosphate(KTP) crystal by anglec of rotation rotating platform
ext, can obtain the tunable Terahertz output within the scope of 0.6-3.0THz.Above-mentioned Q-switch 15, potassium titanyl oxygenic phosphate(KTP) crystal 5 all carry out temperature control by cooling constant temperature system 13, and keeping temperature is 20 ℃.
Described laser diode LD side pumping module 18 is that near LD side-pump laser head (peak power 180W), driving power and water cooling box 808nm forms by wavelength.
Described neodymium-doped yttrium-aluminum garnet Nd:YAG crystal 5 is of a size of Φ 3mm × 68mm, and its doping content is the anti-reflection film (transmitance is greater than 99.8%) that two end faces of 1-at.% are all coated with 1000nm-1100nm wave band.
Described Q-modulating device 15 is made up of radio frequency input unit and acousto-optic adjusting Q crystal, and the length of adjusting Q crystal is 46mm, and both ends of the surface are all coated with the anti-reflection film (transmitance is greater than 99.8%) to 1000nm-1100nm wave band; Modulating frequency is that 1-50kHz is adjustable, changes the density of adjusting Q crystal by input radio frequency ripple, sexually revises the object of laserresonator threshold value performance period, plays Q-switch effect.
Described potassium titanyl oxygenic phosphate(KTP) crystal 5 is identical with the nonlinear crystal potassium titanium oxide phosphate 5 in embodiment 1.
The Effect of Back-Cavity Mirror 4 of described Terahertz parametric device, the outgoing mirror 6 of Terahertz parametric device, pumped laser system resonant cavity Effect of Back-Cavity Mirror 12, pumped laser system resonant cavity outgoing mirror 17 are all flat mirrors, are coated with the high-reflecting film (reflectivity is greater than 99.8%) of 1000nm-1100nm wavelength.
Workflow: the pump light that LD side pumping source sends 808nm incides neodymium-doped yttrium-aluminum garnet Nd:YAG crystal 14, when acousto-optic Q modulation switch 15 is in the time cutting out, pump light transfers reversion particle to and stores; In the time that Q switching 15 is opened, a large amount of reversion particles of saving bit by bit transfer 1064.2nm fundamental frequency light to by stimulated radiation moment; The fundamental frequency light with high peak power is during through potassium titanyl oxygenic phosphate(KTP) crystal in Terahertz parametric device, due to the effect generation Stokes light of being excited exciton scattering, there is the position generation Terahertz output of total reflection at Stokes simultaneously, change the incident angle of incident light by anglec of rotation rotating platform, i.e. pump light and the angle θ of Stokes light outside potassium titanyl oxygenic phosphate(KTP) crystal
ext, can obtain the tunable Terahertz output within the scope of 3.17-6.13THz.
A Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal as described in Example 3, its difference is, just removes Q-switch 15, obtains continuous terahertz emission ripple running.
The pump light that workflow: LD sends 808nm enters neodymium-doped yttrium-aluminum garnet Nd:YAG crystal 14 through optical fiber 10 and coupled lens group 11, transfers 1064.2nm fundamental frequency light to by stimulated radiation; When fundamental frequency light passes through the potassium titanyl oxygenic phosphate(KTP) crystal in Terahertz parametric device, produce Stokes light and the terahertz emission ripple of continuous operation owing to being excited the effect of exciton scattering, THz wave obtains output by Terahertz silicon prism-coupled parts 8, change the incident angle of incident light by anglec of rotation rotating platform, i.e. pump light and the angle θ of Stokes light outside potassium titanyl oxygenic phosphate(KTP) crystal
ext, can obtain the tunable Terahertz output within the scope of 3.17-6.13THz.
A Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal as described in Example 4, its difference is, nonlinear crystal potassium titanium oxide phosphate 5 is with the nonlinear crystal potassium titanium oxide phosphate 5 in embodiment 2.
As shown in Figure 8, a kind of Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal as described in Example 2, comprise the ns level pulse laser of the 1-100Hz of the low repetition of the 1(flash lamp pumping of laser pumped by pulsed laser source or LD pumping), beam expander or contracting bundle device 2, the polarization state of pumping laser adjusted by half-wave plate 3 and the z axle of nonlinear crystal potassium titanium oxide phosphate 5 is parallel, nonlinear crystal potassium titanium oxide phosphate 5 and Terahertz silicon prism-coupled parts 8 form Terahertz parametric device, the nonlinear crystal potassium titanium oxide phosphate 5 of Terahertz parametric device contacts with the zox face gapless of Terahertz silicon prism-coupled parts 8, laser pumped by pulsed laser source 1, the pumping source system in beam expander or contracting bundle device 2 and the common composition of half-wave plate 3 Terahertz parameter source.A kind of method of work of the Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal is as follows: the laser that send in laser pumped by pulsed laser source 1 is adjusted laser facula size by beam expander or contracting bundle device 2, then after adjusting polarization state by half-wave plate 3, enter Terahertz parametric device, because the A1 diaphragm 268.5cm-1 of potassium titanyl oxygenic phosphate(KTP) crystal has Raman and infrared active simultaneously, thereby can produce and be excited exciton scattering, produce Stokes light, produce terahertz emission ripple simultaneously, and export by Terahertz silicon prism-coupled parts 8.Potassium titanyl oxygenic phosphate(KTP) crystal 5, as nonlinear dielectric, can effectively produce Stokes and Terahertz conversion, can obtain the Terahertz output within the scope of 3.17-6.13THz.
The Nd:YAG adjusting Q pulse laser that described laser pumped by pulsed laser source 1 is flash lamp pumping or LD pumping, wavelength is 1064.2nm, and repetition rate is the adjustable ns level pulse laser of 1-100Hz, and maximum pump energy is 1J, and pulse duration is 8ns.
Described nonlinear crystal potassium titanium oxide phosphate, cut direction θ=90 ° of described nonlinear crystal, φ=0 °, described θ is the angle of pumping laser and nonlinear crystal z axle, and φ is the angle of nonlinear crystal x axle and nonlinear crystal side, and nonlinear crystal is l=50mm along x shaft length, be d=6mm along the length of y axle, be 6mm along the thickness of z axle, the size cut direction of described nonlinear crystal is not limited to this, and the size of crystal can be come to determine as required.
The both ends of the surface of described nonlinear crystal potassium titanium oxide phosphate are all coated with the anti-reflection film of 1000nm-1100nm wavelength, side polishing.
Described THz wave coupling unit 8 is coupled modes of Terahertz silicon prism array.
Described cooling system is circulating water---crystal on side face is all used with the metal derby of pipeline and is encased, and continues to be connected with recirculated cooling water in the pipeline of metal derby, is used for reducing temperature to crystal.
Workflow: it is 2.5mm that the 1064.2nm laser that Nd:YAG adjusting Q pulse laser pumping source 1 sends is adjusted laser spot diameter by beam expander or contracting bundle device 2, then adjust by half-wave plate 8 the z axle that laser polarization state is parallel to potassium titanyl oxygenic phosphate(KTP) crystal, enter in Terahertz parametric device, because the A1 diaphragm 268.5cm-1 of potassium titanyl oxygenic phosphate(KTP) crystal has Raman and infrared active simultaneously, thereby can produce and be excited exciton scattering, produce near the Stokes light of 1080nm, produce the terahertz emission ripple within the scope of 3.17-6.13THz simultaneously, and obtain output by Terahertz silicon prism-coupled parts 8.
A Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal as described in Example 8, its difference is, nonlinear crystal potassium titanium oxide phosphate 5 is with the nonlinear crystal potassium titanium oxide phosphate 5 in embodiment 1.
Claims (10)
1. the Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal, is characterized in that, this Terahertz parameter source comprises laser pumping system, Terahertz parametric device and cooling system; Described Terahertz parametric device comprises potassium titanyl oxygenic phosphate(KTP) crystal, described laser pumping system send pumping laser along Terahertz parametric device irradiate, described potassium titanyl oxygenic phosphate(KTP) crystal be excited exciton scattering process form Terahertz parameter source.
2. a kind of Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal according to claim 1, is characterized in that, the THz wave reference frequency output in described Terahertz parameter source is 3.17-6.13THz.
3. a kind of Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal according to claim 1, it is characterized in that, described Terahertz parametric device also comprises the Effect of Back-Cavity Mirror of Terahertz parametric device, the outgoing mirror of Terahertz parametric device, and the laser that described laser pumping system is sent penetrates successively along the outgoing mirror of Effect of Back-Cavity Mirror, potassium titanyl oxygenic phosphate(KTP) crystal and the Terahertz parametric device of Terahertz parametric device.
4. a kind of Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal according to claim 1, is characterized in that, described potassium titanyl oxygenic phosphate(KTP) crystal is nonlinear crystal potassium titanium oxide phosphate.
5. a kind of Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal according to claim 4, it is characterized in that, cut direction θ=90 ° of the crystal of described nonlinear crystal potassium titanium oxide phosphate, φ is arbitrarily angled, described θ is the angle of pumping laser and nonlinear crystal z axle, φ is the angle of nonlinear crystal x axle and nonlinear crystal side, and the length of nonlinear crystal is l, and the width of nonlinear crystal is d.
6. a kind of Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal according to claim 5, is characterized in that x, y, z represents respectively the x axle of potassium titanyl oxygenic phosphate(KTP) crystal, y axle and z direction of principal axis, the cutting angle φ of the crystal x axle of Terahertz exit facet and nonlinear crystal potassium titanium oxide phosphate
1scope be-45 ° to-15 °.
7. a kind of Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal according to claim 5, is characterized in that, the both ends of the surface of described nonlinear crystal potassium titanium oxide phosphate are all coated with anti-reflection film; The Effect of Back-Cavity Mirror of described Terahertz parametric device is coated with the high-reflecting film at Stokes wave band.
8. a kind of Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal according to claim 4, is characterized in that,
Cut direction θ=90 ° of the crystal of described nonlinear crystal potassium titanium oxide phosphate, the span of φ is-10 ° to+10 °, described θ is the angle of pumping laser and nonlinear crystal z axle, φ is the angle of nonlinear crystal x axle and nonlinear crystal side, the length of nonlinear crystal is l, and the width of nonlinear crystal is d; Described Terahertz parametric device also comprises THz wave coupling unit, and described THz wave coupling unit is silicon materials prisms, described silicon materials prism and nonlinear crystal seamless contact of xz face.
9. a kind of Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal according to claim 8, is characterized in that, the both ends of the surface of described nonlinear crystal potassium titanium oxide phosphate, and yz face is all coated with anti-reflection film; Do polishing at THz wave exit facet (xz face); The Effect of Back-Cavity Mirror of described Terahertz parametric device is coated with the high-reflecting film at Stokes wave band.
One kind the method for work in the Terahertz parameter source based on potassium titanyl oxygenic phosphate(KTP) crystal is as follows as claimed in claim 1:
The pump light that laser pumping origin system sends enters into the potassium titanium oxide phosphate nonlinear crystal of described Terahertz parametric device, with in potassium titanyl oxygenic phosphate(KTP) crystal, there is Raman and infrared-active crystal diaphragm simultaneously and interact, exciton scattering is excited in generation, in Terahertz parametric device, form Stokes laser, produce terahertz emission ripple simultaneously, and utilize silicon prism-coupled array coupled modes or the mode of launching by vertical surface obtains terahertz emission output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410064229.1A CN103794293B (en) | 2014-02-25 | 2014-02-25 | Terahertz parameter source based on potassium titanyl phosphate crystal and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410064229.1A CN103794293B (en) | 2014-02-25 | 2014-02-25 | Terahertz parameter source based on potassium titanyl phosphate crystal and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103794293A true CN103794293A (en) | 2014-05-14 |
| CN103794293B CN103794293B (en) | 2017-01-18 |
Family
ID=50669865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410064229.1A Active CN103794293B (en) | 2014-02-25 | 2014-02-25 | Terahertz parameter source based on potassium titanyl phosphate crystal and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103794293B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106451032A (en) * | 2016-10-10 | 2017-02-22 | 华北水利水电大学 | Terahertz-wave enhanced inner cavity terahertz wave parameter oscillator |
| CN107561815A (en) * | 2017-10-19 | 2018-01-09 | 北京航空航天大学 | A kind of high energy terahertz pulse generation device and method |
| EP3602700A4 (en) * | 2017-03-24 | 2020-12-23 | Macquarie University | Improvements in terahertz lasers and terahertz extraction |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101609243A (en) * | 2009-07-21 | 2009-12-23 | 华中科技大学 | A kind of terahertz-wave parametric oscillator based on corner-cube prism resonant cavity |
| CN101614930A (en) * | 2009-07-21 | 2009-12-30 | 华中科技大学 | A kind of frequency tuning method for TeraHertz parameter oscillator |
| US20100213375A1 (en) * | 2007-06-01 | 2010-08-26 | Johann Wolfgang Goethe-Universitat Frankfurt A.M. | DEVICE AND METHOD FOR GENERATING AND DETECTING COHERENT ELECTROMAGNETIC RADIATION IN THE THz FREQUENCY RANGE |
-
2014
- 2014-02-25 CN CN201410064229.1A patent/CN103794293B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100213375A1 (en) * | 2007-06-01 | 2010-08-26 | Johann Wolfgang Goethe-Universitat Frankfurt A.M. | DEVICE AND METHOD FOR GENERATING AND DETECTING COHERENT ELECTROMAGNETIC RADIATION IN THE THz FREQUENCY RANGE |
| CN101609243A (en) * | 2009-07-21 | 2009-12-23 | 华中科技大学 | A kind of terahertz-wave parametric oscillator based on corner-cube prism resonant cavity |
| CN101614930A (en) * | 2009-07-21 | 2009-12-30 | 华中科技大学 | A kind of frequency tuning method for TeraHertz parameter oscillator |
Non-Patent Citations (2)
| Title |
|---|
| JUN-ICHI S，MANABU S，TETSUO T，HIROMASA ITO: "《Enhancement of terahertz-wave output from LiNO3 optical parametric oscillators by cryogenic cooling》", 《OPTICS LETTERS》 * |
| 金成国、李珍、黄凌雄、张昌龙、李辉、陈林: "《熔盐法和水热法KTP晶体的晶胞参数及拉曼光谱特征》", 《人工晶体学报》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106451032A (en) * | 2016-10-10 | 2017-02-22 | 华北水利水电大学 | Terahertz-wave enhanced inner cavity terahertz wave parameter oscillator |
| CN106451032B (en) * | 2016-10-10 | 2018-10-30 | 华北水利水电大学 | A kind of inner cavity tera wave parametric oscillator of THz wave enhancing |
| EP3602700A4 (en) * | 2017-03-24 | 2020-12-23 | Macquarie University | Improvements in terahertz lasers and terahertz extraction |
| US10944232B2 (en) | 2017-03-24 | 2021-03-09 | Macquarie University | Terahertz lasers and terahertz extraction |
| CN107561815A (en) * | 2017-10-19 | 2018-01-09 | 北京航空航天大学 | A kind of high energy terahertz pulse generation device and method |
| CN107561815B (en) * | 2017-10-19 | 2023-09-26 | 北京航空航天大学 | High-energy terahertz pulse generation device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103794293B (en) | 2017-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103811990A (en) | Terahertz parameter source and application thereof on the basis of potassium titanium oxide arsenate crystals | |
| Pavel | Simultaneous dual-wavelength emission at 0.90 and 1.06 µm in Nd-doped laser crystals | |
| Gao et al. | Pulsed 456 nm deep‐blue light generation by acoustooptical Q‐switching and intracavity frequency doubling of Nd: GdVO4 | |
| CN103500911A (en) | Multipoint vertical surface emitting terahertz parametric oscillator and application thereof | |
| CN103618205A (en) | Full-solid-state single longitudinal mode yellow light laser | |
| CN203747233U (en) | Seed injection type vertical surface launch terahertz parameter generator | |
| CN102263366A (en) | All solid-state 579nm yellow Raman laser pumped by laser | |
| CN103825189A (en) | Seed injection type surface vertical launching terahertz parameter generator and application thereof | |
| CN100428587C (en) | Laser diode side pumped thulium/holmium double doped lithium lutetium fluoride crystal laser | |
| CN105048270A (en) | Laser amplifier based on lithium niobate crystals and application thereof | |
| CN101242076A (en) | A KTA crystal full solid Raman laser | |
| CN109586153B (en) | Neodymium-doped lithium yttrium fluoride nanosecond pulse blue laser | |
| CN103794293A (en) | Terahertz parameter source based on potassium titanyl phosphate crystal and application thereof | |
| Ma et al. | Highly efficient H-β Fraunhofer line optical parametric oscillator pumped by a single-frequency 355 nm laser | |
| Zhu et al. | All-solid-state dual end pumped Nd: YAG/LBO yellow green laser with 10.8 W output power at 561 nm | |
| CN111224311A (en) | Hundred-nanosecond-level fast-switching dual-wavelength Raman laser | |
| Lu et al. | Highly efficient electro-optically Q-switched 473 nm blue laser | |
| CN106099625A (en) | A kind of Terahertz based on arsenic acid titanyl rubidium crystal produces system and method for work thereof | |
| CN201766283U (en) | Passive Q-switching testing facility for semi-conductor pump solid lasers | |
| CN101159362A (en) | LD terminal pump yellow light laser | |
| CN2917036Y (en) | High-power narrow line-width full solid state 455nm pulse laser | |
| Lu et al. | Highly efficient single longitudinal mode-pulsed green laser | |
| CN110632805B (en) | Solid single-laser dual-wavelength pumping optical difference frequency terahertz wave generating device | |
| CN101159363A (en) | LD terminal pump Nd:YVO4/KTP yellow light laser | |
| CN101308992A (en) | Folding cavity self-raman frequency doubling completely solid yellow laser |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |