CN101561554A - Phase-controllable birefringence space optical bridge - Google Patents
Phase-controllable birefringence space optical bridge Download PDFInfo
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- CN101561554A CN101561554A CNA2009100516086A CN200910051608A CN101561554A CN 101561554 A CN101561554 A CN 101561554A CN A2009100516086 A CNA2009100516086 A CN A2009100516086A CN 200910051608 A CN200910051608 A CN 200910051608A CN 101561554 A CN101561554 A CN 101561554A
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- WQEVDHBJGNOKKO-UHFFFAOYSA-K vanadic acid Chemical compound O[V](O)(O)=O WQEVDHBJGNOKKO-UHFFFAOYSA-K 0.000 claims description 3
- 229910052727 yttrium Inorganic materials 0.000 claims description 3
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 3
- 238000004891 communication Methods 0.000 abstract description 16
- 230000010363 phase shift Effects 0.000 abstract description 13
- 230000001427 coherent effect Effects 0.000 abstract description 11
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- 229910021532 Calcite Inorganic materials 0.000 description 4
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- 238000001514 detection method Methods 0.000 description 2
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- 230000000644 propagated effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- QBLDFAIABQKINO-UHFFFAOYSA-N barium borate Chemical compound [Ba+2].[O-]B=O.[O-]B=O QBLDFAIABQKINO-UHFFFAOYSA-N 0.000 description 1
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Abstract
A phase controllable double refraction space optical bridge is composed of a combined double refraction optical plate for realizing the light splitting and synthesizing of two input light beams, a quarter-wave plate for phase shift control, and a coherent optical communication receiver for spatially compounding laser communication signal light beam and local oscillation laser light beam and outputting four synthetic light beams with required phase shift relation to realize 2X 4 space optical bridge. The quarter-wave plate enables two polarization components which are vertical to each other to generate 90-degree phase shift, and the phase difference between the two components can be changed by rotating the optical axis direction of the quarter-wave plate, so that the phase error generated by errors such as machining and the like is compensated, and therefore the phase-shifting compensation device has the advantages of being simple in structure, stable in performance and controllable in phase. The method is suitable for the fields of free space laser coherent communication and laser radar.
Description
Technical field
The present invention relates to coherent laser communication and laser radar, particularly a kind of phase-controllable birefringence space light bridge.Utilize the birefringence optics flat board of combination two input beams to be carried out the space coupling and be divided into four tunnel synthetic light beam outputs, realize 2 * 4 spatial light bridge joint, quarter-wave plate produces controllable phase shift, in the photoreceiver of coherent detection, be used for space compound laser signal light beam and local oscillation laser beam, and produce 90 degree, 2 * 4 space light bridges that can carry out phase control as required.
Background technology
The satellite borne laser communication terminal of realizing the high code check of high capacity, miniaturization and and low-power consumption is the needs of free space laser communication.Because the receiver sensitivity of coherent light communication is than highly sensitive one more than the magnitude of incoherent light communication, and can take multiple modulation system, increase receiver selectivity, be the gordian technique that realizes laser communication system between lightweight of new generation, high code check star.The receiving end of a coherent light homodyne communication port is made up of this machine laser oscillator, photoelectron reception, phase-locked loop, light bridge and flashlight receiving light path.Light bridge arrives optoelectronic receiver with signal laser and local oscillator laser links, is one of system core device in the coherent optical communication system, and the receptivity of coherent communication system depends on the performance of light bridge.According to the type that produces phase shift, the optics bridge is divided into 90 °, 180 ° two kinds, and wherein 180 ° of phase shift bridges are used for balance phase-locked loop receiver, and 90 ° of phase shift bridges are used for costas phase lock loop road receiver.Quantity according to the input-output port is divided into 2 * 2, different types such as 2 * 4.Although in optical fiber telecommunications system, people utilize optical fiber and waveguide to develop multiple optics bridge scheme, but these are applicable to that the optics bridge of optical fiber telecommunications system can not satisfy the demand of space communtication, do not belong to space light bridge, in free space laser communication system, the light signal that is received not only will be used to survey the communication information also will carry out the positional information extraction to carry out optical precision tracking, and for the free space laser communication terminal, light bridge must be that free space is propagated.In the free space optical bridge joint, first technology [1], [2] (referring to 180 ° of Hybrids for of 90 ° of and of document 1:WalterR.leeb.Realization of Optical Frequencies[C].
Band 37[1983], Heft 5/6:203-206. document 2:R.Garreis, C.Zeiss, " 90 ° of opticalhybrid for coherent receivers; " Proc.SPIE, Vol.1522, pp.210-219,1991.) the employing polarization beam apparatus has been proposed in conjunction with wave plate, unpolarized beam splitter is realized 2 * 2 space light bridge schemes of 90 degree and 180 degree phase shifts in conjunction with wave plate, document [2] has then proposed the implementation of 2 * 4 90 degree phase shifts on this basis, but this scheme must make two polarized components of incident beam through polarization beam apparatus, phase place behind the unpolarized beam splitter satisfies particular kind of relationship, the technical very difficult realization of this point, in addition, also have whole optical system need guarantee the strict aplanatism transmission of light beam, shortcomings such as dress is difficulty, and related elements is too much, and is not easy of integration.Elder generation's technology [3], and [4] (referring to document 3: Liu Liren, Liu Dean, Yan Aimin, Luan Zhu, Wang Lijuan, Sun Jianfeng, clockwise is red, electric control phase shift space optical hybrid, patent of invention, notification number: 100383572, utility model patent notification number of the same name: 200959599; Document 4: Liu Liren, Yan Aimin, Luan Zhu, Liu Dean, Sun Jianfeng, Wang Lijuan, clockwise is red, birefringence free space optical bridge, patent of invention, notification number: 100383571, utility model patent notification number 2899300 of the same name) birefringence effect of comprehensive utilization crystal and electrooptical effect have proposed other 2 * 4 90 degree space light bridge schemes, though solved first technology [1], [2] related elements is too much, shortcoming not easy of integration, but first technology [3] needs when having the phase control of carrying out every wafer making alive and carry out voltage-regulation, complex process, first technology [4] then has the shortcoming that can not carry out phase control.
Summary of the invention
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of phase-controllable birefringence space light bridge is provided, advantage such as that this space light bridge should have is simple in structure, stable performance, phase place are controlled.Be applicable to the coherent light detection system of free space transmission.
Technical solution of the present invention is as follows:
A kind of phase-controllable birefringence space light bridge, be characterized in by quarter-wave plate, the first birefringence optics flat board, the second birefringence optics flat board, the 3rd birefringence optics flat board, the 4th birefringence optics is dull and stereotyped and an analyzing birefringence is dull and stereotyped constitutes, the position of above-mentioned each component relation is: described first birefringence optics direction of optic axis dull and stereotyped and the second birefringence optics flat board is opposite and stack and form first and fold piece, described the 3rd birefringence optics direction of optic axis dull and stereotyped and the 4th birefringence optics flat board is opposite and stack and form second and fold piece, described quarter-wave plate is positioned at the positive front of the first birefringence optics flat board or the second birefringence optics flat board, its fast axle or slow axis are parallel to the principal section of the first birefringence optics flat board or the second birefringence optics flat board, direct of travel along light is described quarter-wave plate successively, the first folded piece, second folded piece and the analyzing birefringence flat board, the described first birefringence optics flat board, the principal section of the second birefringence optics flat board and the 3rd birefringence optics flat board, the principal section of the 4th birefringence optics flat board is vertical mutually, the principal section placement at 45 of the principal section of described analyzing birefringence flat board and the 3rd birefringence optics flat board, the described first birefringence optics flat board, the second birefringence optics flat board, the 3rd birefringence optics flat board, the 4th birefringence optics flat board is that material is identical, the flat board that the rectangle single axial birefringence crystal that physical dimension is identical is made.
A kind of phase-controllable birefringence space light bridge, be characterized in by quarter-wave plate, the first birefringence optics flat board, the second birefringence optics flat board, the 3rd birefringence optics flat board, the 4th birefringence optics flat board, the 5th birefringence optics is dull and stereotyped and the 6th birefringence optics is dull and stereotyped constitutes, the position of above-mentioned each component relation is: described first birefringence optics direction of optic axis dull and stereotyped and the second birefringence optics flat board is opposite and stack and form first and fold piece, described the 3rd birefringence optics direction of optic axis dull and stereotyped and the 4th birefringence optics flat board is opposite and stack and form second and fold piece, described the 5th birefringence optics is dull and stereotyped opposite with the dull and stereotyped direction of optic axis of the 6th birefringence optics and stack formation triple-lap piece, direct of travel along light is described quarter-wave plate successively, the first folded piece, second folded piece and the triple-lap piece, the fast axle of described quarter-wave plate or slow axis are parallel to the principal section of the first birefringence optics flat board or the second birefringence optics flat board, the principal section placement at 45 of the principal section of described triple-lap piece and described the 3rd birefringence optics flat board, the described first birefringence optics flat board, the second birefringence optics flat board, the 3rd birefringence optics flat board, the 4th birefringence optics flat board, the 5th birefringence optics is dull and stereotyped to be that material is identical with the 6th birefringence optics flat board, the rectangle single axial birefringence crystal flat board that physical dimension is identical.
It is the rotating mechanism of axle that the optical axis of described quarter-wave plate has with the incident ray.
The plane of incidence and the exit facet perpendicular to light going direction of the described first birefringence optics flat board, the second birefringence optics flat board, the 3rd birefringence optics flat board, the 4th birefringence optics flat board, analyzing birefringence flat board, the 5th birefringence optics flat board and the 6th birefringence optics flat board are the optical polish face.
Described single axial birefringence crystal is kalzit, vanadic acid yttrium, barium metaborate (α-BBO) or lithium columbate crystal.
The described first birefringence optics flat board, the second birefringence optics flat board, the 3rd birefringence optics flat board, the 4th birefringence optics flat board, the 5th birefringence optics flat board and the 6th birefringence optics flat board are the rectangular parallelepiped flat board, and the plane of incidence of this rectangular parallelepiped flat board to the length of exit facet is
The width of the plane of incidence is 〉=2d, highly is 〉=d, and wherein d is the diameter of first light beam and second light beam, and α is very light beam and the fleet angle of ordinary light beam in birefringence optics flat board.
The plane of incidence of described analyzing birefringence flat board to the length of exit facet is
The width of the plane of incidence is 〉=2d, highly
Wherein d is the diameter of first light beam and second light beam, and α is very light beam and the fleet angle of ordinary light beam in birefringence optics flat board.
The principal refractive index of birefringence optics flat board is respectively n
oAnd n
eWhen light impinged perpendicularly on crystal interface, to be decomposed into refractive index be n to light wave once entering crystal
oAnd n
eO light and e light, its BEAM SQUINT angle α satisfies relational expression:
Correspondingly the beam separation distance is:
ΔL＝Dtanα
Wherein, θ is the orientation of the optical axis of crystal of birefringence optics flat board, and D is the length along the propagation of o light of birefringence flat board.
Technique effect of the present invention:
Phase-controllable birefringence space light bridge of the present invention adopts two pairs of dull and stereotyped branch combiners of realizing light beam of birefringence optics of totally four same structures, quarter-wave plate produces the phase shifts of 90 degree and carries out the adjusting of phase place by the rotation of optical axis, thereby realizes 2 * 4 the 90 degree space light bridges that phase place is controlled.Because four birefringence optics flat boards can guarantee accurate same structure, overcome technology [1] formerly, [2] difficult problem is assembled in the strict aplanatism transmission that must guarantee the whole optical system light beam, quarter-wave plate can make orthogonal two polarized components produce the phase shift of 90 degree, and be that axle its optical axis compensation of rotation is because the phase error that processing and rigging error cause with the incident ray, overcome technology [1] formerly, [2] light beam passes through polarization beam apparatus in, the unmanageable difficulty of its phase relation behind the unpolarized beam splitter, also overcome the phase control complex process problem of technology [3] formerly and formerly technology [4] can not carry out phase-adjusted shortcoming, therefore the present invention has simple in structure, stable performance, advantage such as phase place is controlled.Be applicable to coherent optical communication system and laser radar that free space is propagated.
Description of drawings
Fig. 1 is the structural representation of phase-controllable birefringence space light bridge embodiment 1 of the present invention.
Fig. 2 is the structural representation of phase-controllable birefringence space light bridge embodiment 2 of the present invention.
Fig. 3 is the synoptic diagram of optical axis of crystal orientation and BEAM SQUINT in the calcite birefringence optical flat principal section.
Embodiment
Further describe the present invention below in conjunction with drawings and Examples, but should not limit protection scope of the present invention with this.
See also Fig. 1 earlier, as seen from Figure 1, phase-controllable birefringence space light bridge embodiment 1 of the present invention, by quarter-wave plate 3, the first birefringence optics flat board 4, the second birefringence optics flat board 5, the 3rd birefringence optics flat board 6, the dull and stereotyped 7 and one analyzing birefringence dull and stereotyped 8 of the 4th birefringence optics constitutes, the position of above-mentioned each component relation is: the direction of optic axis of the dull and stereotyped 4 and second birefringence optics flat board 5 of the described first birefringence optics is opposite and stack and form the first folded piece, the direction of optic axis of dull and stereotyped the 6 and the 4th birefringence optics flat board 7 of described the 3rd birefringence optics is opposite and stack and form the second folded piece, direct of travel along light is described quarter-wave plate 3 successively, the first folded piece, second folded piece and the analyzing birefringence flat board 8, the principal section that the fast axle of described quarter-wave plate 3 or slow axis are parallel to the dull and stereotyped 4 or second birefringence optics flat board 5 of the first birefringence optics, the described first birefringence optics flat board 4, the principal section of the second birefringence optics flat board 5 and the 3rd birefringence optics flat board 6, the principal section of the 4th birefringence optics flat board 7 is vertical mutually, the principal section placement at 45 of the principal section of described analyzing birefringence flat board 8 and the 3rd birefringence optics flat board 6, the described first birefringence optics flat board 4, the second birefringence optics flat board 5, the 3rd birefringence optics flat board 6, the 4th birefringence optics flat board 7 is that material is identical, the flat board that the rectangle single axial birefringence crystal that physical dimension is identical is made.It is the rotating mechanism of axle that the optical axis of described quarter-wave plate 3 has with the incident ray.The plane of incidence and the exit facet perpendicular to light going direction of the described first birefringence optics flat board 3, the second birefringence optics flat board 4, the 3rd birefringence optics flat board 6, the 4th birefringence optics flat board 7, analyzing birefringence flat board 8, dull and stereotyped the 9 and the 6th birefringence optics flat board 10 of the 5th birefringence optics are the optical polish face.
The first birefringence optics flat board 4, the second birefringence optics flat board 5, the 3rd birefringence optics flat board 6, the 4th birefringence optics flat board 7 all are the uniaxial crystal rectangular flat plate, and its size and structure are identical.The geometric configuration of analyzing birefringence flat board 8 is the uniaxial crystal rectangular flat plate.The plane of incidence and the exit facet perpendicular to light going direction of the first birefringence optics flat board 4, the second birefringence optics flat board 5, the 3rd birefringence optics flat board 6, the 4th birefringence optics dull and stereotyped 7 and analyzing birefringence flat board 8 are the optical polish face, its optical axis of crystal is oriented to θ, is defined as the angle of o light wave normal direction and optical axis.The principal section of birefringence optics flat board is the optical axis of crystal, o light and the residing common plane of e light.
In the present embodiment, quarter-wave plate 3 is placed on before the first birefringence optics flat board 4, signal beams 1 incides the bottom of the first birefringence optics flat board 4 by quarter-wave plate 3, and its polarization direction is 45 ° of orientations.In the first birefringence optics flat board 4, signal beams 1 is decomposed into o light and e light and departs from mutually, forms two bundle parallel beam outputs.Local beam 2 is directly incident on the top of the second birefringence optics flat board 5, and its polarization direction is 45 ° of orientations.Local beam 2 is decomposed into o light part and e light part and departs from mutually in the second birefringence optics flat board 5, forms two bundle parallel beam outputs.The direction of optic axis of the dull and stereotyped 4 and second birefringence optics flat board 5 of the first birefringence optics is opposite, and their e light departs from out in opposite direction.
Enter dull and stereotyped the 6 and the 4th birefringence optics flat board 7 of the 3rd birefringence optics that stacks from four road light beams of dull and stereotyped 5 outgoing of the dull and stereotyped 4 and second birefringence optics of the first birefringence optics that stacks, the principal section that makes them is respectively perpendicular to the principal section of the dull and stereotyped 4 and second birefringence optics flat board 5 of the first birefringence optics, the two-way light beam on top spatially synthetic one the tunnel is exported through the 3rd birefringence optics flat board 6 like this, and the two-way light beam of bottom is through spatially synthetic one tunnel output of the 4th birefringence optics flat board 7.
The principal section of definition analyzing birefringence flat board 8 is the optical axis plane definite with the crystal interface normal, makes the principal section placement at 45 of itself and birefringence optics flat board 6.Produce the o light light beam 11 and the e light light beam 12 of apart by analyzing birefringence dull and stereotyped 8 from the light beam of dull and stereotyped 7 outputs of birefringence optics.Produce the o light light beam 13 and the e light light beam 14 of apart by analyzing birefringence dull and stereotyped 8 from the light beam of dull and stereotyped 6 outputs of birefringence optics.Promptly exporting four tunnel synthetic light beams, is 2 * 4 space light bridge.
For obtaining bigger BEAM SQUINT, adopt BEAM SQUINT maximization design generally speaking.Under the maximum deviation corner condition, for negative axialite body, direction of optic axis is:
And the pass between the deviation angle alpha of the direction of optic axis θ of the dull and stereotyped crystal of birefringence optics and light beam is:
Corresponding beam separation distance is:
ΔL＝Dtanα
m (3)
Wherein D is the length along the propagation of o light of birefringence flat board.
See also Fig. 2, Fig. 2 is the synoptic diagram of phase-controllable birefringence space light bridge embodiment 2 structures of the present invention.The analyzing birefringence flat board 8 that the difference of this embodiment and embodiment 1 replaces among Fig. 1 with dull and stereotyped the 9 and the 6th birefringence optics dull and stereotyped 10 of the 5th birefringence optics that stacks.As seen from the figure, the present embodiment phase-controllable birefringence space light bridge, by quarter-wave plate 3, the first birefringence optics flat board 4, the second birefringence optics flat board 5, the 3rd birefringence optics flat board 6, the 4th birefringence optics flat board 7, dull and stereotyped the 9 and the 6th birefringence optics dull and stereotyped 10 of the 5th birefringence optics constitutes, the position of above-mentioned each component relation is: the direction of optic axis of the dull and stereotyped 4 and second birefringence optics flat board 5 of the described first birefringence optics is opposite and stack and form the first folded piece, the direction of optic axis of dull and stereotyped the 6 and the 4th birefringence optics flat board 7 of described the 3rd birefringence optics is opposite and stack and form the second folded piece, dull and stereotyped 10 direction of optic axis of dull and stereotyped the 9 and the 6th birefringence optics of described the 5th birefringence optics are opposite and stack and form the triple-lap piece, direct of travel along light is described quarter-wave plate 3 successively, the first folded piece, second folded piece and the triple-lap piece, the principal section that the fast axle of described quarter-wave plate 3 or slow axis are parallel to the dull and stereotyped 4 or second birefringence optics flat board 5 of the first birefringence optics, the principal section placement at 45 of the principal section of described triple-lap piece and described the 3rd birefringence optics flat board 6, the described first birefringence optics flat board 4, the second birefringence optics flat board 5, the 3rd birefringence optics flat board 6, the 4th birefringence optics flat board 7, the 5th birefringence optics dull and stereotyped 9 is that material is identical with the 6th birefringence optics flat board 10, the rectangle single axial birefringence crystal flat board that physical dimension is identical.
Making the light beam 1 and the light beam 2 of input all is linearly polarized light, and wherein: the fast axle or the slow axis of the light vector direction of vibration of light beam 1 and quarter-wave plate become miter angle, and the light vector direction of vibration of light beam 2 becomes miter angle with the principal section of birefringence optics flat board.Light beam 1 at first passes through quarter-wave plate 3, folds piece and analyzing birefringence optics dull and stereotyped 8 or triple-lap piece through the first folded piece, second successively with light beam 2 then, as shown in Figure 1 and Figure 2, obtain four bundle output beams 11 at last, 12,13 and 14, their light intensity is respectively:
Wherein, A
l, A
sBe respectively the complex amplitude of light beam 1, light beam 2,
Be the initial phase difference of light bridge input end light beam 1, light beam 2, φ
4o, φ
4e, φ
5o, φ
5eBe o, the phase delay of e light in birefringence optics flat board 4,5, φ
6o, φ
6e, φ
7o, φ
7eBe o, the phase delay of e light in birefringence optics flat board 6,7.
Design four birefringence optics flat boards 4,5,6,7 and formed by same wafer cutting, its structure, size and optical property are identical, guarantee their phase delay
With
All identical, then have:
Like this, four light intensity of restrainting output beams 11,12,13 and 14 become respectively:
As seen: the present invention has realized having the four-way output of relative 90 degree phase shifts, i.e. 2 * 4 90 ° of space light bridges.
If serves as the optical axis of quarter-wave plate low-angle δ of axle rotation with incident ray 1, light beam 1 is by after it, and two its phase differential of orthogonal polarized component no longer are 90 degree, but 90+2 δ, therefore, four last bundle output beams 11,12,13 and 14 light intensity becomes respectively:
As seen: the present invention can adjust the relative phase difference of each output beam by the optical axis of rotation quarter-wave plate, to compensate the phase deviation of the output beam that causes owing to the error in processing and the assembling process.Therefore, the present invention 2 * 4 90 ° of space light bridges have the adjustable function of phase place.
Among the present invention, birefringence optics flat board 4, birefringence optics flat board 5, birefringence optics flat board 6, birefringence optics flat board 7 can be divided into by the thickness cutting by a monoblock birefringence optics flat board, to guarantee theirs
,
All identical.Birefringence optics flat board 9, birefringence optics flat board 10 also are divided into by the thickness cutting by a monoblock birefringence optics flat board, to guarantee them identical optical property and structure are arranged.
The 5th birefringence optics flat board 9, the plane of incidence of the 6th birefringence optics flat board 10 and the length of exit facet are
The width of the plane of incidence is 〉=2d highly to be 〉=d.
The plane of incidence of analyzing birefringence flat board 8 and the length of exit facet are
The width of the plane of incidence is 〉=2d highly to be
By among the embodiment shown in Figure 1, the first birefringence optics flat board 4, the second birefringence optics flat board 5, dull and stereotyped the 6 and the 4th birefringence optics dull and stereotyped 7 of the 3rd birefringence optics and analyzing birefringence flat board 8 all adopt calcite crystal, and take to maximize the BEAM SQUINT design.By among the embodiment shown in Figure 2, the 5th birefringence optics flat board 9, the 6th birefringence optics flat board 10 also adopt calcite crystal and take to maximize the BEAM SQUINT design.The synoptic diagram of optical axis of crystal orientation and BEAM SQUINT as shown in Figure 3 in the dull and stereotyped principal section of birefringence optics.
The light beam 1 among embodiment Fig. 1 and the diameter of light beam 2 are φ 2mm.The physical dimension of the first birefringence optics flat board 4, the second birefringence optics flat board 5, dull and stereotyped the 6 and the 4th birefringence optics flat board 7 of the 3rd birefringence optics is identical, is that a monoblock calcite birefringence optical flat forms by the thickness cutting.If be 1064nm with wavelength, quarter-wave plate is of a size of 4mm * 4mm, and the principal refractive index of being calculated on this wavelength by the dispersion equation of kalzit is n
o=1.6423, n
e=1.4797, design kalzit flat board 4, kalzit flat board 5, kalzit dull and stereotyped 6 and kalzit flat board 7 are of a size of length * wide * height=40mm * 20mm * 10mm, and direction of optic axis is θ
m=48 °, the kalzit analyzer is of a size of length * wide * height=40mm * 40mm * 40mm, and direction of optic axis is θ
m=48 °, last output beam 11 and 12,13 and 14 separating distance are about 4.4mm.
Among embodiment Fig. 2, the 5th kalzit optical flat 9, the 6th kalzit optical flat 10 are of a size of length * wide * height=40mm * 20mm * 10mm, and the separating distance that obtains output beam 11 and 12,13 and 14 equally is about 4.4mm.
Claims (8)
1, a kind of phase-controllable birefringence space light bridge, it is characterized in that by quarter-wave plate (3), the first birefringence optics flat board (4), the second birefringence optics flat board (5), the 3rd birefringence optics flat board (6), the 4th a birefringence optics flat board (7) and an analyzing birefringence flat board (8) constitute, the position of above-mentioned each component relation is: the direction of optic axis of the described first birefringence optics flat board (4) and the second birefringence optics flat board (5) is opposite and stack and form first and fold piece, the direction of optic axis of described the 3rd birefringence optics flat board (6) and the 4th birefringence optics flat board (7) is opposite and stack and form the second folded piece, described quarter-wave plate (3) is positioned at the positive front of the first birefringence optics flat board (4) or the second birefringence optics flat board (5), its fast axle or slow axis are parallel to the principal section of the first birefringence optics flat board (4) or the second birefringence optics flat board (5), direct of travel along light is described quarter-wave plate (3) successively, the first folded piece, second folded piece and the analyzing birefringence flat board (8), the described first birefringence optics flat board (4), the principal section of the second birefringence optics flat board (5) and the 3rd birefringence optics flat board (6), the principal section of the 4th birefringence optics flat board (7) is vertical mutually, the principal section placement at 45 of the principal section of described analyzing birefringence flat board (8) and the 3rd birefringence optics flat board (6), the described first birefringence optics flat board (4), the second birefringence optics flat board (5), the 3rd birefringence optics flat board (6), the 4th birefringence optics flat board (7) is that material is identical, the flat board that the rectangle single axial birefringence crystal that physical dimension is identical is made.
2, a kind of phase-controllable birefringence space light bridge, it is characterized in that by quarter-wave plate (3), the first birefringence optics flat board (4), the second birefringence optics flat board (5), the 3rd birefringence optics flat board (6), the 4th birefringence optics flat board (7), the 5th birefringence optics flat board (9) and the 6th birefringence optics flat board (10) constitute, the position of above-mentioned each component relation is: the direction of optic axis of the described first birefringence optics flat board (4) and the second birefringence optics flat board (5) is opposite and stack and form first and fold piece, the direction of optic axis of described the 3rd birefringence optics flat board (6) and the 4th birefringence optics flat board (7) is opposite and stack and form the second folded piece, (10 direction of optic axis are opposite and stack and form the triple-lap piece for described the 5th birefringence optics flat board (9) and the 6th birefringence optics flat board, direct of travel along light is described quarter-wave plate (3) successively, the first folded piece, second folded piece and the triple-lap piece, the principal section that the fast axle of described quarter-wave plate (3) or slow axis are parallel to the first birefringence optics flat board (4) or the second birefringence optics flat board (5), the principal section placement at 45 of the principal section of described triple-lap piece and described the 3rd birefringence optics flat board (6), the described first birefringence optics flat board (4), the second birefringence optics flat board (5), the 3rd birefringence optics flat board (6), the 4th birefringence optics flat board (7), the 5th birefringence optics flat board (9) is that material is identical with the 6th birefringence optics flat board (10), the rectangle single axial birefringence crystal flat board that physical dimension is identical.
3, it is the rotating mechanism of axle that phase-controllable birefringence space light bridge according to claim 1 and 2, the optical axis that it is characterized in that described quarter-wave plate (3) have with the incident ray.
4, birefringence free space optical bridge according to claim 1 and 2 is characterized in that the plane of incidence and the exit facet perpendicular to light going direction of the described first birefringence optics flat board (4), the second birefringence optics flat board (5), the 3rd birefringence optics flat board (6), the 4th birefringence optics flat board (7), analyzing birefringence flat board (8), the 5th birefringence optics flat board (9) and the 6th birefringence optics flat board (10) is the optical polish face.
5, phase-controllable birefringence space light bridge according to claim 1 is characterized in that described single axial birefringence crystal is kalzit, vanadic acid yttrium, α-BBO or lithium columbate crystal.
6, phase-controllable birefringence space light bridge according to claim 2 is characterized in that described single axial birefringence crystal is kalzit, vanadic acid yttrium, α-BBO or lithium columbate crystal.
7, phase-controllable birefringence space light bridge according to claim 1 and 2, it is characterized in that the described first birefringence optics flat board (4), the second birefringence optics flat board (5), the 3rd birefringence optics flat board (6), the 4th birefringence optics flat board (7), the 5th birefringence optics flat board (9) and the 6th birefringence optics flat board (10) are the rectangular parallelepiped flat board, the plane of incidence of this rectangular parallelepiped flat board to the length of exit facet is
The width of the plane of incidence is 〉=2d, highly is 〉=d, and wherein d is the diameter of first light beam (1) and second light beam (2), and α is very light beam and the fleet angle of ordinary light beam in birefringence optics flat board.
8, phase-controllable birefringence space light bridge according to claim 1, the plane of incidence that it is characterized in that described analyzing birefringence flat board (8) to the length of exit facet is
The width of the plane of incidence is 〉=2d, highly 〉=
, wherein d is the diameter of first light beam (1) and second light beam (2), α is very light beam and the fleet angle of ordinary light beam in birefringence optics flat board.
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| CNA2009100516086A CN101561554A (en) | 2009-05-20 | 2009-05-20 | Phase-controllable birefringence space optical bridge |
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| CNA2009100516086A CN101561554A (en) | 2009-05-20 | 2009-05-20 | Phase-controllable birefringence space optical bridge |
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| CN102074637A (en) * | 2009-11-19 | 2011-05-25 | 深圳市光峰光电技术有限公司 | Method and structure for encapsulating solid-state luminous chips and light source device using encapsulation structure |
| CN105634591A (en) * | 2016-01-19 | 2016-06-01 | 中国科学院上海光学精密机械研究所 | Free space coherent light communication detection device based on 2*4 90-degree optical bridges |
| CN105842846A (en) * | 2015-08-05 | 2016-08-10 | 深圳市福瑞贝斯光电科技有限公司 | Novel polarization-independent reflected light decoupling system |
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| CN105842846A (en) * | 2015-08-05 | 2016-08-10 | 深圳市福瑞贝斯光电科技有限公司 | Novel polarization-independent reflected light decoupling system |
| CN106444064A (en) * | 2015-08-05 | 2017-02-22 | 深圳市福瑞贝斯光电科技有限公司 | Novel polarization-related reflected light decoupling system |
| CN106444064B (en) * | 2015-08-05 | 2018-10-12 | 深圳市福瑞贝斯光电科技有限公司 | A kind of novel polarization dependent reflectance light decoupling collaboration system |
| CN105634591B (en) * | 2016-01-19 | 2018-08-14 | 中国科学院上海光学精密机械研究所 | Free space coherent light communication detection device based on 2 × 4 90 ° of optical bridging devices |
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| CN110646776A (en) * | 2017-07-12 | 2020-01-03 | 通用汽车环球科技运作有限责任公司 | Chip-scale LIDAR with single MEMS scanner in compact optical package |
| CN110646776B (en) * | 2017-07-12 | 2023-05-02 | 通用汽车环球科技运作有限责任公司 | Chip-scale LIDAR with a single MEMS scanner in a compact optical package |
| CN110244470A (en) * | 2019-05-17 | 2019-09-17 | 西安理工大学 | 90 degree of space light bridges of high-performance crystal-type |
| CN110244470B (en) * | 2019-05-17 | 2021-05-25 | 西安理工大学 | Crystal type 90-degree space optical bridge |
| CN110161516A (en) * | 2019-05-21 | 2019-08-23 | 深圳市速腾聚创科技有限公司 | Laser radar range device and laser scanning control method |
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