CN101769796A - Frequency-resolved optical gating method based femtosecond laser pulse testing platform - Google Patents
Frequency-resolved optical gating method based femtosecond laser pulse testing platform Download PDFInfo
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- CN101769796A CN101769796A CN201010107995A CN201010107995A CN101769796A CN 101769796 A CN101769796 A CN 101769796A CN 201010107995 A CN201010107995 A CN 201010107995A CN 201010107995 A CN201010107995 A CN 201010107995A CN 101769796 A CN101769796 A CN 101769796A
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Abstract
The invention discloses a frequency-resolved optical gating method based femtosecond laser pulse testing platform. In the platform, after laser to be detected emitted by a laser device is converged by a cylindrical lens in a laser converge assembly, the laser becomes convergent light; after the convergent light is subjected to beam splitting and delayed time processing by a Fresnel biprism in a beam splitting time-delay assembly, the convergent light becomes delayed light; after the delayed light is subjected to frequency multiplication by BBO crystal in a frequency multiplication crystal assembly, the delayed light becomes frequency multiplied light; after the frequency multiplied light is imaged by a bicylinder lens in an imaging assembly, the frequency multiplied light becomes imaged light; the imaged light is acquired by a CCD camera in an image acquisition assembly to become image information; and the image information is received by a computer. The testing platform is to mount a plurality of optical devices on a substrate, can conveniently realize coaxiality of the laser converge assembly, the beam splitting time-delay assembly, the frequency multiplication crystal assembly, the imaging assembly and the CCD camera.
Description
Technical field
The present invention relates to a kind of device of Laser Measurement pulsewidth, more particularly say, be meant a kind of femto-second laser pulse test platform that is applicable to the frequency resolution optical shoulder rotation of no-raster parts, this platform belongs to the optical measurement device.
Background technology
The ultrashort laser pulse technology enters fs (femtosecond) stage from ps (psec), and measuring techniques such as two-photon fluorescence method, streak camera can't be suitable for by the restriction of time, spatial resolution, only has the measurement of correlation method to be leveraged to the present.The measurement of correlation method roughly comprises intensity autocorrelation measurement method and interferes the autocorrelation measurement method.Because the intensity correlation method can only provide the width of ultrashort pulse and can not provide information such as impulse phase, pulse shape, so in femtosecond pulse is measured, seldom use.
Be used for the femtosecond pulse measurement at present and mainly be based on frequency resolution optical shoulder rotation and the relevant electric field reconstruct method of self-reference spectrum phase that grows up on the interference autocorrelation measurement method.
Summary of the invention
The purpose of this invention is to provide a kind of femto-second laser pulse test platform based on the frequency resolution optical shoulder rotation, when testing laser in turn through converging-being obtained by image collection assembly after beam split time-delay-frequency multiplication-imaging.This test platform is movably arranged on a plurality of optical device on the pedestal, can realize easily that laser converges the coaxial of assembly, light beam splitting time-delay assembly, frequency-doubling crystal assembly, image-forming assembly and CCD camera.In light beam splitting time-delay assembly, can measure the light source of multiple pulsewidth by changing the Fresnel double prism.The test platform architecture of the present invention's design simply, is easily realized coaxial operation and control.
A kind of femto-second laser pulse test platform based on the frequency resolution optical shoulder rotation of the present invention includes FROG pulsewidth test platform, laser instrument, computing machine, and stores and operate in the laser pulse width process software in the computing machine; Laser instrument is used for the laser that outgoing centre wavelength is 1550nm; The laser pulse width process software is used for the image information that receives is handled and result's demonstration;
This test platform converges assembly (1), light beam splitting time-delay assembly (2), frequency-doubling crystal assembly (3), image-forming assembly (4), image collection assembly (5) and pedestal (6) by laser and forms;
Converged after cylindrical lens (14) the assembly (1) converges by laser from the testing laser of laser emitting, become and converge light;
This converges after light carried out beam splitting and delay process by your biprism (24) of the luxuriant and rich with fragrance Sheng in the light beam splitting time-delay assembly (2), becomes time-delay light;
This time-delay light becomes frequency doubled light after being carried out process of frequency multiplication by the bbo crystal (34) in the frequency-doubling crystal assembly (3);
This frequency doubled light becomes imaging after being carried out imaging processing by the bicylinder lens group in the image-forming assembly (4);
This imaging is formed image information by the CCD camera (54) in the image collection assembly (5) collection;
This image information is received by computing machine.
The advantage of femto-second laser pulse test platform of the present invention is:
(1) replaces the optical system for testing of common sweep type FROG ultrashort laser pulse by the combined optical path that adopts Fresnel biprism and thick frequency-doubling crystal and post lens, thereby realize the test of the FROG ultrashort laser pulse of no-raster parts.
(2) adopt ultrashort pulse and frequency-doubling crystal effect, the ultrashort pulse of importing is divided into two pulses by the Fresnel biprism affacts on the frequency-doubling crystal simultaneously, and the laser behind the Fresnel biprism is to overlap with certain angle to produce frequency-doubled signal.At this moment two pulses have different delays in the diverse location place on the frequency doubled light area of beam that produces, thereby converted pulse to light distribution about postponing public coherent signal about the locus, adopt the CCD camera can detect light distribution, can extrapolate the parameters such as pulse width of ultrashort laser pulse.
(3) adopt the Fresnel biprism to come beam split, thereby the difficult point of having avoided adopting the Mach-Zehnder interferometers beam split accurately to adjust light path can realize that the FROG ultrashort laser pulse test by the no-raster parts.
(4) adopt thick frequency-doubling crystal, improved the resolution of ultrashort laser pulse test.
(5) adopt the CCD camera of visible light and near-infrared band to carry out the detection of pulsed optical signals, avoided the employing of high speed optoelectronic detecting devices, greatly reduce cost.
(6) femto-second laser pulse test platform of the present invention has adopted the virtual instrument technique based on LabVIEW, can shorten the cycle of the software development and the software and hardware uniting and adjustment of test macro significantly.
Description of drawings
Fig. 1 is the structured flowchart of the FROG ultrashort laser pulse test macro of no-raster parts of the present invention.
Fig. 2 is the functional block diagram of femto-second laser pulse test platform of the present invention.
Fig. 3 is the Organization Chart of femto-second laser pulse test platform of the present invention.
Fig. 4 is the STRUCTURE DECOMPOSITION figure of the present invention's first anchor clamps.
Fig. 4 A is the structural drawing that A goes up anchor clamps in first anchor clamps.
Fig. 4 B is the structural drawing of cylindrical mirror in first anchor clamps.
Fig. 5 is the STRUCTURE DECOMPOSITION figure of the present invention's second anchor clamps.
Fig. 5 A is the structural drawing that B goes up anchor clamps in second anchor clamps.
Fig. 5 B is the structural drawing of Sino-Philippines your biprism of Sheng of second anchor clamps.
Fig. 6 is the STRUCTURE DECOMPOSITION figure of the present invention's the 4th anchor clamps.
Fig. 6 A is the structural drawing that C goes up anchor clamps in the 4th anchor clamps.
Fig. 6 B is the structural drawing of biconvex cylindrical mirror in the 4th anchor clamps.
Fig. 7 is the STRUCTURE DECOMPOSITION figure of frequency-doubling crystal assembly of the present invention.
Fig. 7 A is the structural drawing of oval anchor clamps in the frequency-doubling crystal assembly.
Fig. 8 is the STRUCTURE DECOMPOSITION figure of imaging acquisition component of the present invention.
Among the figure: 1. laser converges assembly 10. first erecting frame 11.A and goes up anchor clamps 111. upper faces
112. lower face 11A. jacking block 11B.A through hole 11C.B through hole 11D.A tapped through hole
11E.B tapped through hole 11F.C tapped through hole 11G.A setting nut 11H.B setting nut 11J.C setting nut
11K. right plate face 11L. left plate face 12.A lower clamp 12A.A groove 12B.A guide pillar
12C.B guide pillar 12D.D tapped through hole 13. first slide blocks 131. upper face 13A.A support columns
13B. link 13C.A chute 13D.D setting nut 13E. right plate face 13F.E tapped through hole
14. plate face 14D. lower face behind the cylindrical mirror 14A. upper face 14B. front face 14C.
Go up anchor clamps 14E. converge zone 2. smooth beam splitting time-delay assembly 20. second erecting frame 21.B
211. upper face 212. lower face 21A. jacking block 21B.C through hole 21C.D through holes
21D.F tapped through hole 21E.G tapped through hole 21F.H tapped through hole 21G.E setting nut 21H.F setting nut
21J.G setting nut 21K. right plate face 21L. left plate face 22.B lower clamp 22A.B groove
22B.C guide pillar 22C.D guide pillar 22D.I tapped through hole 23. second slide blocks 231. upper faces
23A.B support column 23B. link 23C.B chute 23D.H setting nut 23E. right plate face
23F.J plate face behind you the biprism 24B. front face 24C. of tapped through hole 24. luxuriant and rich with fragrance Sheng
24E. converge regional 24F. cross section 3. frequency-doubling crystal assemblies 30. the 3rd erecting frame, 32. oval anchor clamps
32A. upper face 32B. groove 32C. draw-in groove 32D. lower face 32E. screw thread counter sink
33. the 3rd slide block 331. upper face 33A.C support column 33B. link 33C.C chutes
33D.M setting nut 33E. right plate face 33F.P tapped through hole 34.BBO frequency-doubling crystal
4. image-forming assembly 40. the 4th erecting frame 41.C goes up anchor clamps 411. upper faces 412. lower faces
41A. jacking block 41B.E through hole 41C.F through hole 41D.K tapped through hole 41E.L tapped through hole
41F.M tapped through hole 41G.I setting nut 41H.J setting nut 41J.K setting nut 41K. right plate face
41L. left plate face 42.C lower clamp 42A.C groove 42B.E guide pillar 42C.F guide pillar
42D.N tapped through hole 43. Four-sliders 431. upper face 43A.D support column 43B. links
43C.D semicylinder mirror before the chute 43D.L setting nut 43E. right plate face 43F.O tapped through hole 44.
44A. plate face 44D. lower face 44E. converges the zone behind the upper face 44B. front face 44C.
444. later half cylindrical mirror 5. image collection assemblies 50. the 5th erecting frame 53. the 5th slide block 531. upper faces
53A.E support column 53B. link 53C.E chute 53D.N setting nut 53E. right plate face
53F.Q tapped through hole 54.CCD camera 6. pedestals 61. dovetail type slide rail 62.A supporting surfaces
63.B supporting surface 64.A installed surface 65.B installed surface
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
Referring to Figure 1 shows that a kind of laser pulse width measuring system, this laser pulse width measuring system is made of laser instrument, FROG pulsewidth test platform, computing machine and storage and the laser pulse width process software that operates in the computing machine.
The centre wavelength of the laser of the laser emitting in this laser pulse width measuring system is 1550nm.
Computing machine in this laser pulse width measuring system is a kind ofly can carry out the modernized intelligent electronic device of massive values computation and various information processings automatically, at high speed according to prior program stored.Minimalist configuration is CPU2GHz, internal memory 2GB, hard disk 180GB; Operating system is windows 2000/2003/XP.
Laser pulse width process software in this laser pulse width measuring system adopts LabVIEW graphical system design software platform that the result is calculated and demonstrated to the data of gathering.
Referring to Fig. 2, shown in Figure 3, described FROG pulsewidth test platform is based on the frequency resolution optical shoulder rotation.This test platform converges assembly 1, light beam splitting time-delay assembly 2, frequency-doubling crystal assembly 3, image-forming assembly 4, image collection assembly 5 and pedestal 6 by laser and forms.Laser converges assembly 1, light beam splitting time-delay assembly 2, frequency-doubling crystal assembly 3, image-forming assembly 4 and image collection assembly 5 and is installed on the pedestal 6, and can slide on pedestal 6.In the present invention, converge in assembly 1, light beam splitting time-delay assembly 2, frequency-doubling crystal assembly 3, image-forming assembly 4 and the image collection assembly 5 being slidingly matched of separately erecting frame by pedestal 6 and laser, guaranteed a plurality of devices coaxial on same axis direction, this axis direction is meant the length direction of pedestal 6.
Converged after cylindrical lens 14 assembly 1 converges by laser from the testing laser of laser emitting, become and converge light;
This converges after light carried out beam splitting and delay process by your biprism 24 of luxuriant and rich with fragrance Sheng in the light beam splitting time-delay assembly 2, becomes time-delay light;
This time-delay light becomes frequency doubled light after being carried out process of frequency multiplication by the bbo crystal in the frequency-doubling crystal assembly 3 34;
This frequency doubled light becomes imaging after being carried out imaging processing by the bicylinder lens group in the image-forming assembly 4;
This imaging is gathered by the CCD camera in the image collection assembly 5 54 and is formed image information;
This image information is received by computing machine.
(1) laser converges assembly 1
Shown in Fig. 3, Fig. 4, Fig. 4 A, Fig. 4 B, laser converges assembly 1 and is made of first erecting frame 10 and cylindrical lens 14, and first erecting frame 10 includes A and goes up anchor clamps 11, A lower clamp 12 and first slide block 13.
The upper face 111 of the last anchor clamps 11 of A is provided with A through hole 11B, B through hole 11C and A tapped through hole 11D, and A tapped through hole 11D is arranged between A through hole 11B and the B through hole 11C; The A guide pillar 12B that A through hole 11B is used on the A lower clamp 12 passes, and A guide pillar 12B is slided up and down in this A through hole 11B; The B guide pillar 12C that B through hole 11C is used on the A lower clamp 12 passes, and B guide pillar 12C is slided up and down in this B through hole 11C; A tapped through hole 11D is used for A setting nut 11G and passes, and makes the end of A setting nut 11G hold out against the upper face 14A of cylindrical mirror 14;
The lower face 112 of the last anchor clamps 11 of A is provided with jacking block 11A, and jacking block 11A is between A through hole 11B and B through hole 11C, and A tapped through hole 11D runs through jacking block 11A;
The right plate face 11K of the last anchor clamps 11 of A is provided with B tapped through hole 11E, and this B tapped through hole 11E is used for B setting nut 11H and passes, and the end of B setting nut 11H is contacted with B guide pillar 12C;
The left plate face 11L of the last anchor clamps 11 of A is provided with C tapped through hole 11F, and this C tapped through hole 11F is used for C setting nut 11J and passes, and the end of C setting nut 11J is contacted with A guide pillar 12B.
In the present invention, B setting nut 11H and B guide pillar 12C cooperate and C setting nut 11J with realized that A is gone up anchor clamps 11 to be installed on A guide pillar 12B and the B guide pillar 12C cooperating of A guide pillar 12B.
A lower clamp 12 is provided with A groove 12A, and the end, two ends of this A groove 12A is provided with A guide pillar 12B and B guide pillar 12C, and A guide pillar 12B is used to pass the A through hole 11B on the last anchor clamps 11 of A, and B guide pillar 12C is used to pass the B through hole 11C on the last anchor clamps 11 of A; The center position of A lower clamp 12 is provided with D tapped through hole 12D, and this D tapped through hole 12D is used for being connected with the threaded ends 13B of A support column 13A on first slide block 13, thereby realizes A lower clamp 12 is installed on first slide block 13; Be placed with cylindrical lens 14 in the A groove 12A on the A lower clamp 12.
The upper face 131 of first slide block 13 is provided with A support column 13A, and the threaded ends 13B of A support column 13A is connected with D tapped through hole 12D on the A lower clamp 12;
The right panel face 13E of first slide block 13 is provided with E tapped through hole 13F, this E tapped through hole 13F is used for D setting nut 13D and passes, and the end that makes D setting nut 13D holds out against the side of the dovetail type slide rail 61 of pedestal 6, thereby realizes that first slide block 13 is fixed tightly on the pedestal 6;
The bottom centre position of first slide block 13 is provided with A chute 13C, and this A chute 13C is used for contacting with dovetail type slide rail 61 on the pedestal 6.
In the present invention, cylindrical lens 14 is chosen the cylindrical lens that company of FuJian FuJing Science Co., Ltd produces, and the focal length of this cylindrical lens is 200mm.
In the present invention, the cylindrical lens 14 that laser converges in the assembly 1 is used for the testing laser of laser emitting is converged, and, converge rayed on your biprism 21 of luxuriant and rich with fragrance Sheng of light beam splitting time-delay assembly 2 through what cylindrical lens 14 saw through at the regional 14A inner focusing that converges of the front face 14B of this cylindrical lens 14.
(2) light beam splitting time-delay assembly 2
Shown in Fig. 3, Fig. 5, Fig. 5 A, Fig. 5 B, light beam splitting time-delay assembly 2 is made of second erecting frame 20 and luxuriant and rich with fragrance Sheng that biprism 24, and second erecting frame 20 includes B and goes up anchor clamps 21, B lower clamp 22 and second slide block 23.
The upper face 211 of the last anchor clamps 21 of B is provided with C through hole 21B, D through hole 21C and F tapped through hole 21D, and F tapped through hole 21D is arranged between C through hole 21B and the D through hole 21C; The C guide pillar 22B that C through hole 21B is used on the B lower clamp 22 passes, and C guide pillar 22B is slided up and down in this C through hole 21B; The D guide pillar 22C that D through hole 21C is used on the B lower clamp 22 passes, and D guide pillar 22C is slided up and down in this D through hole 21C; F tapped through hole 21D is used for E setting nut 21G and passes, and makes the end of E setting nut 21G hold out against the upper end of your biprism 24 of luxuriant and rich with fragrance Sheng;
The lower face 212 of the last anchor clamps 21 of B is provided with jacking block 21A, and jacking block 21A is between C through hole 21B and D through hole 21C, and F tapped through hole 21D runs through jacking block 21A;
The right plate face 21K of the last anchor clamps 21 of B is provided with G tapped through hole 21E, and this G tapped through hole 21E is used for F setting nut 21H and passes, and the end of F setting nut 21H is contacted with D guide pillar 22C;
The left plate face 21L of the last anchor clamps 21 of B is provided with H tapped through hole 21F, and this H tapped through hole 21F is used for G setting nut 21J and passes, and the end of G setting nut 21J is contacted with C guide pillar 22B.
In the present invention, F setting nut 21H and D guide pillar 22C cooperate and G setting nut 21J with realized that B is gone up anchor clamps 21 to be installed on C guide pillar 22B and the D guide pillar 22C cooperating of C guide pillar 22B.
B lower clamp 22 is provided with B groove 22A, and the end, two ends of this B groove 22A is provided with C guide pillar 22B and D guide pillar 22C, and C guide pillar 22B is used to pass the C through hole 21B on the last anchor clamps 21 of B, and D guide pillar 22C is used to pass the D through hole 21C on the last anchor clamps 21 of B; The center position of B lower clamp 22 is provided with I tapped through hole 22D, and this I tapped through hole 22D is used for being connected with the threaded ends 23B of B support column 23A on second slide block 23, thereby realizes B lower clamp 22 is installed on second slide block 23; Be placed with luxuriant and rich with fragrance Sheng that biprism 24 in the B groove 22A on the B lower clamp 22.
The upper face 231 of second slide block 23 is provided with B support column 23A, and the threaded ends 23B of B support column 23A is connected with I tapped through hole 22D on the B lower clamp 22;
The right panel face 23E of second slide block 23 is provided with J tapped through hole 23F, this J tapped through hole 23F is used for H setting nut 23D and passes, and the end that makes H setting nut 23D holds out against the side of the dovetail type slide rail 61 of pedestal 6, thereby realizes that second slide block 23 is fixed tightly on the pedestal 6;
The bottom centre position of second slide block 23 is provided with B chute 23C, and this B chute 23C is used for contacting with dovetail type slide rail 61 on the pedestal 6.
Luxuriant and rich with fragrance your biprism 24 of Sheng is divided into front face 24B, back plate face 24C and leg-of-mutton cross section 24F, and the drift angle of triangular-section 24F is designated as θ, θ=160 degree～172 degree.The central area of front face 24B is for converging regional 24E, and this converges the laser that regional 24E is used to converge laser emitting, also is testing laser.During installation, you the front face 24B of biprism 24 of luxuriant and rich with fragrance Sheng is relative with the laser of laser emitting.
In the present invention, your biprism 24 of luxuriant and rich with fragrance Sheng is chosen the product that FuJian FuJing Science Co., Ltd produces, and the drift angle of this biprism is 170 degree.
In the present invention, cylindrical lens 24 in the light beam splitting time-delay assembly 2 is used for the testing laser of laser emitting is converged, and, converge rayed on your biprism 21 of luxuriant and rich with fragrance Sheng of light beam splitting time-delay assembly 2 through what cylindrical lens 14 saw through at the regional 14A inner focusing that converges of the front face 14B of this cylindrical lens 24.
Regulate laser for convenience, efficiently and converge coverage between assembly 1 and the light beam splitting time-delay assembly 2, to simplify convenient installation two mirrors.
2 pairs of assemblies of light beam splitting time-delay incide on your biprism 24 of luxuriant and rich with fragrance Sheng, you are beamed into two-beam to converging light by biprism 24 on the one hand luxuriant and rich with fragrance Sheng, produce the interference in the delay time T (τ=femtosecond time parameter) between this two-beam, incide on the frequency-doubling crystal 31 of frequency-doubling crystal assembly 3 thereby form interference fringe.
(3) the frequency-doubling crystal assembly 3
Shown in Fig. 3, Fig. 7, Fig. 7 A, frequency-doubling crystal assembly 3 includes the 3rd erecting frame 30 and BBO frequency-doubling crystal 31, the three erecting frames 30 are made up of the 3rd slide block 33 and oval anchor clamps 32.
Have groove 32B on the upper face 32A of oval anchor clamps 32, have draw-in groove 32C in the groove 32B, BBO frequency-doubling crystal 31 is installed in the draw-in groove 32C;
Have screw thread counter sink 32E on the lower face 32D of oval anchor clamps 32, the threaded ends 33B of the C support column 33A on this screw thread counter sink 32E and the 3rd slide block 33 is connected, thereby has realized oval anchor clamps 32 are installed on the 3rd slide block 33.
The upper face 331 of the 3rd slide block 33 is provided with C support column 33A, and the threaded ends 33B of C support column 33A is connected with screw thread counter sink 32E on the lower face 32D of oval anchor clamps 32;
The right plate face 33E of the 3rd slide block 33 is provided with P tapped through hole 33F, this P tapped through hole 33F is used for M setting nut 33D and passes, and the end that makes M setting nut 33D holds out against the side of the dovetail type slide rail 61 of pedestal 6, thereby realizes that the 3rd slide block 33 is fixed tightly on the pedestal 6;
The bottom centre position of the 3rd slide block 33 is provided with C chute 33C, and this C chute 33C is used for contacting with dovetail type slide rail 61 on the pedestal 6.
The interference fringe of the 34 pairs of incidents of BBO frequency-doubling crystal in the frequency-doubling crystal assembly 3 is carried out the frequency multiplication effect, produces flashlight.
(4) image-forming assembly 4
Shown in Fig. 3, Fig. 6, Fig. 6 A, Fig. 6 B, image-forming assembly 4 is made of the 4th erecting frame 40 and bicylinder lens, and the 4th erecting frame 40 includes C and goes up anchor clamps 41, C lower clamp 42 and Four-slider 43.
The upper face 411 of the last anchor clamps 41 of C is provided with E through hole 41B, F through hole 41C and K tapped through hole 41D, and K tapped through hole 41D is arranged between E through hole 41B and the F through hole 41C; The E guide pillar 42B that E through hole 41B is used on the C lower clamp 42 passes, and E guide pillar 42B is slided up and down in this E through hole 41B; The F guide pillar 42C that F through hole 41C is used on the C lower clamp 42 passes, and F guide pillar 42C is slided up and down in this F through hole 41C; K tapped through hole 41D is used for I setting nut 41G and passes, and makes the end of I setting nut 41G hold out against the upper face 44A of bicylinder lens;
The lower face 412 of the last anchor clamps 41 of C is provided with jacking block 41A, and jacking block 41A is between E through hole 41B and F through hole 41C, and K tapped through hole 41D runs through jacking block 41A;
The right plate face 41K of the last anchor clamps 41 of C is provided with L tapped through hole 41E, and this L tapped through hole 41E is used for J setting nut 41H and passes, and the end of J setting nut 41H is contacted with F guide pillar 42C;
The left plate face 41L of the last anchor clamps 41 of C is provided with M tapped through hole 41F, and this M tapped through hole 41F is used for K setting nut 41J and passes, and the end of K setting nut 41J is contacted with E guide pillar 42B.
In the present invention, J setting nut 41H and E guide pillar 42C cooperate and K setting nut 41J with realized that C is gone up anchor clamps 41 to be installed on E guide pillar 42B and the F guide pillar 42C cooperating of F guide pillar 42B.
C lower clamp 42 is provided with C groove 42A, and the end, two ends of this C groove 42A is provided with E guide pillar 42B and F guide pillar 42C, and E guide pillar 42B is used to pass the E through hole 41B on the last anchor clamps 41 of C, and F guide pillar 42C is used to pass the F through hole 41C on the last anchor clamps 41 of C; The center position of C lower clamp 42 is provided with N tapped through hole 42D, and this N tapped through hole 42D is used for being connected with the threaded ends 43B of D support column 43A on the Four-slider 43, thereby realizes C lower clamp 42 is installed on the Four-slider 43; Be placed with bicylinder lens in the C groove 42A on the C lower clamp 42.
The upper face 431 of Four-slider 43 is provided with D support column 43A, and the threaded ends 43B of D support column 43A is connected with N tapped through hole 42D on the C lower clamp 42;
The right panel face 43E of Four-slider 43 is provided with O tapped through hole 43F, this O tapped through hole 43F is used for L setting nut 43D and passes, and the end that makes L setting nut 43D holds out against the side of the dovetail type slide rail 61 of pedestal 6, thereby realizes that Four-slider 43 is fixed tightly on the pedestal 6;
The bottom centre position of Four-slider 43 is provided with D chute 43C, and this D chute 43C is used for contacting with dovetail type slide rail 61 on the pedestal 6.
Bicylinder lens is by preceding semicylinder lens 44 and later half cylindrical lens 444 bonding forming, and promptly outwards, the plane of two cylindrical lenses bonds together the convex surface of two cylindrical lenses respectively.Bicylinder lens is divided into front face 44B, back plate face 44C, upper face 44A and lower face 44D, and the central area of front face 44B is for converging regional 44E, and this converges the laser that regional 44E is used to converge laser emitting, also is testing laser.During installation, the front face 44B of bicylinder lens is relative with the laser of laser emitting.The focal length of the preceding semicylinder lens 44 in the bicylinder lens is designated as f
44, the focal length of later half cylindrical lens 444 is designated as f
444, and f
44=2f
444
In the present invention, cylindrical lens 44 is chosen the cylindrical lens that FuJian FuJing Science Co., Ltd produces, the focal length of this cylindrical lens be 100mm and 50mm.
In the present invention, the cylindrical lens 44 that laser converges in the assembly 4 is used for the testing laser of laser emitting is converged, and, converge rayed on your biprism 24 of luxuriant and rich with fragrance Sheng of light beam splitting time-delay assembly 2 through what cylindrical lens 44 saw through at the regional 44A inner focusing that converges of the front face 44B of this cylindrical lens 44.
Regulate laser for convenience, efficiently and converge coverage between assembly 1 and the light beam splitting time-delay assembly 2, to simplify convenient installation two mirrors.
(5) image collection assembly 5
Referring to Fig. 3, shown in Figure 8, image collection assembly 5 includes the 5th erecting frame 50 and CCD camera 54.
The upper face 531 of the 5th erecting frame 50 is provided with E support column 53A, on the threaded ends 53B of E support column 53A CCD camera 54 is installed.
The right plate face 53E of the 5th erecting frame 50 is provided with Q tapped through hole 53F, this Q tapped through hole 53F is used for N setting nut 53D and passes, and the end that makes N setting nut 53D holds out against the side of the dovetail type slide rail 61 of pedestal 6, thereby realizes that the 5th erecting frame 50 is fixed tightly on the pedestal 6;
The bottom centre position of the 5th erecting frame 50 is provided with E chute 53C, and this E chute 53C is used for contacting with dovetail type slide rail 61 on the pedestal 6.
The light that converges that CCD camera 54 is gathered from image-forming assembly 4 outgoing, and form electric signal input computing machine.
(6) pedestal 6
The axial centre of pedestal 6 is provided with dovetail type slide rail 61, the both sides of dovetail type slide rail 61 are respectively equipped with A supporting surface 62 and B supporting surface 63, the outside of A supporting surface 62 is provided with A installed surface 64, the outside of B supporting surface 63 is provided with B installed surface 65, A installed surface 64 is provided with mounting hole with B installed surface 65, pedestal 6 and support in the environment that will use can be fixedly mounted by this mounting hole, thereby realize a platform of movably miniaturization.
In the present invention, the axial length of pedestal 6 is designated as L, L=600mm.
In the present invention, the spacing that converges between second slide block 23 in first slide block 13 in the assembly 1 and the light beam splitting time-delay assembly 2 of laser is designated as d
1
In the present invention, second slide block 23 in the light beam splitting time-delay assembly 2 and the spacing between the 3rd slide block 33 in the frequency-doubling crystal assembly 3 are designated as d
2, and d
2=45mm.
In the present invention, the 3rd slide block 33 in the frequency-doubling crystal assembly 3 and the spacing between the Four-slider 43 in the image-forming assembly 4 are designated as d
3The 3rd slide block 33 in the frequency-doubling crystal assembly 3 is installed on axial (length direction) center of pedestal 6.
In the present invention, Four-slider 43 in the image-forming assembly 4 and the spacing between the 5th slide block 53 in the image collection assembly 5 are designated as d
4D is then arranged
3=d
4=f
44, d
1+ d
2=f
14
A kind of femto-second laser pulse test platform that is applicable to the laser pulse width measuring system of the present invention's design based on the frequency resolution optical shoulder rotation, by different mirror mechanisms is installed respectively on a plurality of erecting frames, and conveniently regulate distance (this distance is relevant with the focal length of each mirror) between each mirror by regulating the relative distance of erecting frame on the dovetail type slide rail of pedestal, when the laser beam (testing laser) of laser emitting in turn through converging-being obtained by the CCD camera after beam split time-delay-frequency multiplication-imaging.The auto-correlation information that image collection assembly 5 obtains can be handled by the laser pulse width process software of existing computing machine and storage, thereby obtains the phase place and the light intensity of testing laser.
Claims (7)
1. the femto-second laser pulse test platform based on the frequency resolution optical shoulder rotation includes laser instrument, computing machine, and stores and operate in the laser pulse width process software in the computing machine; Laser instrument is used for the laser that outgoing centre wavelength is 1550nm; The laser pulse width process software is used for the image information that receives is handled and result's demonstration;
It is characterized in that: also include FROG pulsewidth test platform;
This test platform converges assembly (1), light beam splitting time-delay assembly (2), frequency-doubling crystal assembly (3), image-forming assembly (4), image collection assembly (5) and pedestal (6) by laser and forms;
Converged after cylindrical lens (14) the assembly (1) converges by laser from the testing laser of laser emitting, become and converge light;
This converges after light carried out beam splitting and delay process by your biprism (24) of the luxuriant and rich with fragrance Sheng in the light beam splitting time-delay assembly (2), becomes time-delay light;
This time-delay light becomes frequency doubled light after being carried out process of frequency multiplication by the bbo crystal (34) in the frequency-doubling crystal assembly (3);
This frequency doubled light becomes imaging after being carried out imaging processing by the bicylinder lens group in the image-forming assembly (4);
This imaging is formed image information by the CCD camera (54) in the image collection assembly (5) collection;
This image information is received by computing machine.
2. the femto-second laser pulse test platform based on the frequency resolution optical shoulder rotation according to claim 1, it is characterized in that: laser converges assembly (1) and is made of first erecting frame (10) and cylindrical lens (14), and first erecting frame (10) includes A and goes up anchor clamps (11), A lower clamp (12) and first slide block (13);
The upper face (111) of the last anchor clamps of A (11) is provided with A through hole (11B), B through hole (11C) and A tapped through hole (11D), and A tapped through hole (11D) is arranged between A through hole (11B) and the B through hole (11C); The A guide pillar (12B) that A through hole (11B) is used on the A lower clamp (12) passes, and A guide pillar (12B) is slided up and down in this A through hole (11B); The B guide pillar (12C) that B through hole (11C) is used on the A lower clamp (12) passes, and B guide pillar (12C) is slided up and down in this B through hole (11C); A tapped through hole (11D) is used for A setting nut (11G) and passes, and makes the end of A setting nut (11G) hold out against the upper face (14A) of cylindrical mirror (14);
The lower face (112) of the last anchor clamps of A (11) is provided with jacking block (11A), and jacking block (11A) is positioned between A through hole (11B) and the B through hole (11C), and A tapped through hole (11D) runs through jacking block (11A);
The right plate face (11K) of the last anchor clamps of A (11) is provided with B tapped through hole (11E), and this B tapped through hole (11E) is used for B setting nut (11H) and passes, and the end of B setting nut (11H) is contacted with B guide pillar (12C);
The left plate face (11L) of the last anchor clamps of A (11) is provided with C tapped through hole (11F), and this C tapped through hole (11F) is used for C setting nut (11J) and passes, and the end of C setting nut (11J) is contacted with A guide pillar (12B);
A lower clamp (12) is provided with A groove (12A), the end, two ends of this A groove (12A) is provided with A guide pillar (12B) and B guide pillar (12C), A guide pillar (12B) is used to pass the A through hole (11B) on the last anchor clamps (11) of A, and B guide pillar (12C) is used to pass the B through hole (11C) on the last anchor clamps (11) of A; The center position of A lower clamp (12) is provided with D tapped through hole (12D), this D tapped through hole (12D) is used for being connected with the threaded ends (13B) of A support column (13A) on first slide block (13), thereby realizes A lower clamp (12) is installed on first slide block (13); Be placed with cylindrical lens (14) in the A groove (12A) on the A lower clamp (12);
The upper face (131) of first slide block (13) is provided with A support column (13A), and the threaded ends (13B) of A support column (13A) is connected with D tapped through hole (12D) on the A lower clamp (12);
The right panel face (13E) of first slide block (13) is provided with E tapped through hole (13F), this E tapped through hole (13F) is used for D setting nut (13D) and passes, and the end that makes D setting nut (13D) holds out against the side of the dovetail type slide rail (61) of pedestal (6), thereby realizes that first slide block (13) is fixed tightly on the pedestal (6);
The bottom centre position of first slide block (13) is provided with A chute (13C), and this A chute (13C) is used for contacting with dovetail type slide rail (61) on the pedestal (6);
Cylindrical lens (14) is divided into front face (14B), back plate face (14C), upper face (14A) and lower face (14D), the central area of front face (14B) is for converging zone (14E), this converges the laser that zone (14E) is used to converge laser emitting, also is testing laser; During installation, the front face (14B) of cylindrical lens (14) is relative with the laser of laser emitting; Focal distance f 14=195mm～the 205mm of cylindrical lens (14).
3. the femto-second laser pulse test platform based on the frequency resolution optical shoulder rotation according to claim 1, it is characterized in that: light beam splitting time-delay assembly (2) is made of second erecting frame (20) and luxuriant and rich with fragrance Sheng that biprism (24), and second erecting frame (20) includes B and goes up anchor clamps (21), B lower clamp (22) and second slide block (23);
The upper face (211) of the last anchor clamps of B (21) is provided with C through hole (21B), D through hole (21C) and F tapped through hole (21D), and F tapped through hole (21D) is arranged between C through hole (21B) and the D through hole (21C); The C guide pillar (22B) that C through hole (21B) is used on the B lower clamp (22) passes, and C guide pillar (22B) is slided up and down in this C through hole (21B); The D guide pillar (22C) that D through hole (21C) is used on the B lower clamp (22) passes, and D guide pillar (22C) is slided up and down in this D through hole (21C); F tapped through hole (21D) is used for E setting nut (21G) and passes, and makes the end of E setting nut (21G) hold out against the upper end of your biprism (24) of luxuriant and rich with fragrance Sheng;
The lower face (212) of the last anchor clamps of B (21) is provided with jacking block (21A), and jacking block (21A) is positioned between C through hole (21B) and the D through hole (21C), and F tapped through hole (21D) runs through jacking block (21A);
The right plate face (21K) of the last anchor clamps of B (21) is provided with G tapped through hole (21E), and this G tapped through hole (21E) is used for F setting nut (21H) and passes, and the end of F setting nut (21H) is contacted with D guide pillar (22C);
The left plate face (21L) of the last anchor clamps of B (21) is provided with H tapped through hole (21F), and this H tapped through hole (21F) is used for G setting nut (21J) and passes, and the end of G setting nut (21J) is contacted with C guide pillar (22B);
B lower clamp (22) is provided with B groove (22A), the end, two ends of this B groove (22A) is provided with C guide pillar (22B) and D guide pillar (22C), C guide pillar (22B) is used to pass the C through hole (21B) on the last anchor clamps (21) of B, and D guide pillar (22C) is used to pass the D through hole (21C) on the last anchor clamps (21) of B; The center position of B lower clamp (22) is provided with I tapped through hole (22D), this I tapped through hole (22D) is used for being connected with the threaded ends (23B) of B support column (23A) on second slide block (23), thereby realizes B lower clamp (22) is installed on second slide block (23); Be placed with luxuriant and rich with fragrance Sheng that biprism (24) in the B groove (22A) on the B lower clamp (22);
The upper face (231) of second slide block (23) is provided with B support column (23A), and the threaded ends (23B) of B support column (23A) is connected with I tapped through hole (22D) on the B lower clamp (22);
The right panel face (23E) of second slide block (23) is provided with J tapped through hole (23F), this J tapped through hole (23F) is used for H setting nut (23D) and passes, and the end that makes H setting nut (23D) holds out against the side of the dovetail type slide rail (61) of pedestal (6), thereby realizes that second slide block (23) is fixed tightly on the pedestal (6);
The bottom centre position of second slide block (23) is provided with B chute (23C), and this B chute (23C) is used for contacting with dovetail type slide rail (61) on the pedestal (6);
You are divided into front face (24B), back plate face (24C) and leg-of-mutton cross section (24F) by biprism (24) luxuriant and rich with fragrance Sheng, the vertex angle theta of triangular-section (24F)=160 degree～172 degree; The central area of front face (24B) is for converging zone (24E), and this converges the laser that zone (24E) is used to converge laser emitting, also is testing laser; During installation, your front face (24B) of biprism (24) of luxuriant and rich with fragrance Sheng is relative with the laser of laser emitting.
4. the femto-second laser pulse test platform based on the frequency resolution optical shoulder rotation according to claim 1, it is characterized in that: frequency-doubling crystal assembly (3) includes the 3rd erecting frame (30) and BBO frequency-doubling crystal (31), and the 3rd erecting frame (30) is made up of the 3rd slide block (33) and oval anchor clamps (32);
Have groove (32B) on the upper face (32A) of oval anchor clamps (32), have draw-in groove (32C) in the groove (32B), (BBO) frequency-doubling crystal (31) is installed in the draw-in groove (32C);
Have screw thread counter sink (32E) on the lower face (32D) of oval anchor clamps (32), the threaded ends (33B) of the C support column (33A) on this screw thread counter sink (32E) and the 3rd slide block (33) is connected, thereby has realized oval anchor clamps (32) are installed on the 3rd slide block (33);
The upper face (331) of the 3rd slide block (33) is provided with C support column (33A), and the threaded ends (33B) of C support column (33A) is connected with screw thread counter sink (32E) on the lower face (32D) of oval anchor clamps (32);
The right plate face (33E) of the 3rd slide block (33) is provided with P tapped through hole (33F), this P tapped through hole (33F) is used for M setting nut (33D) and passes, and the end that makes M setting nut (33D) holds out against the side of the dovetail type slide rail (61) of pedestal (6), thereby realizes that the 3rd slide block (33) is fixed tightly on the pedestal (6);
The bottom centre position of the 3rd slide block (33) is provided with C chute (33C), and this C chute (33C) is used for contacting with dovetail type slide rail (61) on the pedestal (6).
5. the femto-second laser pulse test platform based on the frequency resolution optical shoulder rotation according to claim 1, it is characterized in that: image-forming assembly (4) is made of the 4th erecting frame (40) and bicylinder lens, and the 4th erecting frame (40) includes C and goes up anchor clamps (41), C lower clamp (42) and Four-slider (43);
The upper face (411) of the last anchor clamps of C (41) is provided with E through hole (41B), F through hole (41C) and K tapped through hole (41D), and K tapped through hole (41D) is arranged between E through hole (41B) and the F through hole (41C); The E guide pillar (42B) that E through hole (41B) is used on the C lower clamp (42) passes, and E guide pillar (42B) is slided up and down in this E through hole (41B); The F guide pillar (42C) that F through hole (41C) is used on the C lower clamp (42) passes, and F guide pillar (42C) is slided up and down in this F through hole (41C); K tapped through hole (41D) is used for I setting nut (41G) and passes, and makes the end of I setting nut (41G) hold out against the upper face (44A) of bicylinder lens;
The lower face (412) of the last anchor clamps of C (41) is provided with jacking block (41A), and jacking block (41A) is positioned between E through hole (41B) and the F through hole (41C), and K tapped through hole (41D) runs through jacking block (41A);
The right plate face (41K) of the last anchor clamps of C (41) is provided with L tapped through hole (41E), and this L tapped through hole (41E) is used for J setting nut (41H) and passes, and the end of J setting nut (41H) is contacted with F guide pillar (42C);
The left plate face (41L) of the last anchor clamps of C (41) is provided with M tapped through hole (41F), and this M tapped through hole (41F) is used for K setting nut (41J) and passes, and the end of K setting nut (41J) is contacted with E guide pillar (42B);
C lower clamp (42) is provided with C groove (42A), the end, two ends of this C groove (42A) is provided with E guide pillar (42B) and F guide pillar (42C), E guide pillar (42B) is used to pass the E through hole (41B) on the last anchor clamps (41) of C, and F guide pillar (42C) is used to pass the F through hole (41C) on the last anchor clamps (41) of C; The center position of C lower clamp (42) is provided with N tapped through hole (42D), this N tapped through hole (42D) is used for being connected with the threaded ends (43B) of D support column (43A) on the Four-slider (43), thereby realizes C lower clamp (42) is installed on the Four-slider (43); Be placed with bicylinder lens in the C groove (42A) on the C lower clamp (42);
The upper face (431) of Four-slider (43) is provided with D support column (43A), and the threaded ends (43B) of D support column (43A) is connected with N tapped through hole (42D) on the C lower clamp (42);
The right panel face (43E) of Four-slider (43) is provided with O tapped through hole (43F), this O tapped through hole (43F) is used for L setting nut (43D) and passes, and the end that makes L setting nut (43D) holds out against the side of the dovetail type slide rail (61) of pedestal (6), thereby realizes that Four-slider (43) is fixed tightly on the pedestal (6);
The bottom centre position of Four-slider (43) is provided with D chute (43C), and this D chute (43C) is used for contacting with dovetail type slide rail (61) on the pedestal (6);
Bicylinder lens is by preceding semicylinder lens (44) and bonding the forming of later half cylindrical lens (444), and promptly outwards, the plane of two cylindrical lenses bonds together the convex surface of two cylindrical lenses respectively; Bicylinder lens is divided into front face (44B), back plate face (44C), upper face (44A) and lower face (44D), the central area of front face (44B) is for converging zone (44E), this converges the laser that zone (44E) is used to converge laser emitting, also is testing laser; During installation, the front face of bicylinder lens (44B) is relative with the laser of laser emitting; The focal length of the preceding semicylinder lens (44) in the bicylinder lens is designated as f
44, the focal length of later half cylindrical lens (444) is designated as f
444, and f
44=2f
444
6. the femto-second laser pulse test platform based on the frequency resolution optical shoulder rotation according to claim 1 is characterized in that: image collection assembly (5) includes the 5th erecting frame (50) and CCD camera (54);
The upper face (531) of the 5th erecting frame (50) is provided with E support column (53A), on the threaded ends (53B) of E support column (53A) CCD camera (54) is installed;
The right plate face (53E) of the 5th erecting frame (50) is provided with Q tapped through hole (53F), this Q tapped through hole (53F) is used for N setting nut (53D) and passes, and the end that makes N setting nut (53D) holds out against the side of the dovetail type slide rail (61) of pedestal 6, thereby realizes that the 5th erecting frame (50) is fixed tightly on the pedestal (6);
The bottom centre position of the 5th erecting frame (50) is provided with E chute (53C), and this E chute (53C) is used for contacting with dovetail type slide rail (61) on the pedestal (6);
CCD camera (54) is gathered the light that converges from image-forming assembly (4) outgoing, and forms electric signal input computing machine.
7. the femto-second laser pulse test platform based on the frequency resolution optical shoulder rotation according to claim 1, it is characterized in that: the axial centre of pedestal (6) is provided with dovetail type slide rail (61), the both sides of dovetail type slide rail (61) are respectively equipped with A supporting surface (62) and B supporting surface (63), the outside of A supporting surface (62) is provided with A installed surface (64), the outside of B supporting surface (63) is provided with B installed surface (65), and A installed surface (64) is provided with mounting hole with B installed surface (65).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102169021A (en) * | 2010-12-23 | 2011-08-31 | 中国原子能科学研究院 | Frequency resolution optical switch method measuring device |
| CN102540638A (en) * | 2012-01-05 | 2012-07-04 | 中航华东光电有限公司 | Detection device for focal position and detection method thereof |
| CN102735698A (en) * | 2011-04-12 | 2012-10-17 | 中国科学院化学研究所 | Adjusting mechanism for neutron optical paths of neutron reflectometer-horizontal sample geometry |
| CN104317154A (en) * | 2014-11-20 | 2015-01-28 | 北京理工大学 | Ultrafast continuous imaging device and method |
| CN107884078A (en) * | 2016-09-29 | 2018-04-06 | 上海菜牛光电科技有限公司 | A kind of integrated frequency resolved optical gating ultrashort pulse tester |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102169021A (en) * | 2010-12-23 | 2011-08-31 | 中国原子能科学研究院 | Frequency resolution optical switch method measuring device |
| CN102169021B (en) * | 2010-12-23 | 2012-11-28 | 中国原子能科学研究院 | Frequency resolution optical switch method measuring device |
| CN102735698A (en) * | 2011-04-12 | 2012-10-17 | 中国科学院化学研究所 | Adjusting mechanism for neutron optical paths of neutron reflectometer-horizontal sample geometry |
| CN102735698B (en) * | 2011-04-12 | 2014-08-13 | 中国科学院化学研究所 | Adjusting mechanism for neutron optical paths of neutron reflectometer-horizontal sample geometry |
| CN102540638A (en) * | 2012-01-05 | 2012-07-04 | 中航华东光电有限公司 | Detection device for focal position and detection method thereof |
| CN104317154A (en) * | 2014-11-20 | 2015-01-28 | 北京理工大学 | Ultrafast continuous imaging device and method |
| CN107884078A (en) * | 2016-09-29 | 2018-04-06 | 上海菜牛光电科技有限公司 | A kind of integrated frequency resolved optical gating ultrashort pulse tester |
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Inventor after: Liu Haixia Inventor after: Ou Pan Inventor after: Liu Lei Inventor after: Jia Yudong Inventor after: Lin Zhili Inventor after: Feng Di Inventor after: Zhang Chunxi Inventor before: Ou Pan Inventor before: Liu Haixia Inventor before: Liu Lei Inventor before: Jia Yudong Inventor before: Lin Zhili Inventor before: Feng Di Inventor before: Zhang Chunxi |
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Free format text: CORRECT: INVENTOR; FROM: OU PAN LIU HAIXIA LIU LEI JIA YUDONG LIN ZHILI FENG DI ZHANG CHUNXI TO: LIU HAIXIA OU PAN LIU LEI JIA YUDONG LIN ZHILI FENG DI ZHANG CHUNXI |
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