CN202948210U - Interference assembly and optical comb filter - Google Patents
Interference assembly and optical comb filter Download PDFInfo
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- CN202948210U CN202948210U CN 201220382045 CN201220382045U CN202948210U CN 202948210 U CN202948210 U CN 202948210U CN 201220382045 CN201220382045 CN 201220382045 CN 201220382045 U CN201220382045 U CN 201220382045U CN 202948210 U CN202948210 U CN 202948210U
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Abstract
The utility model provides an interference assembly and an optical comb filter. The interference assembly comprises: a support unit, which is used for providing supporting; a beam splitting unit, which is fixed on the support unit and is used for dividing the incident light irradiated from an incidence point of a polarizing beam-splitting film of the beam splitting unit into the transmission light and the reflected light in different polarization states and respectively carrying out transmission and reflection; a first total-reflection unit, which is fixed on the support unit and is arranged on the light paths of the transmission light and the reflected light and is used for changing the polarization states of the transmission light and the reflected light and reflecting the transmission light and the reflected light to the incidence point of the polarizing beam-splitting film, so that interferences occur after the transmission light and the reflected light are transmitted from the beam splitting unit when passing through the polarizing beam-splitting film; and a compensation unit, which is fixed on the support unit and is arranged on the light path, between the beam splitting unit and the first total-reflection unit, of the transmission light and is used for compensating the phase of the transmission light. With utilization of the interference assembly provided by the technical scheme, the cost of the instrument can be effectively reduced and the application convenience can be enhanced.
Description
Technical field
The utility model relates to optical communication technique, relates in particular to a kind of interference component and optical interleaver.
Background technology
The characteristic that light has due to himself is widely used in the industries such as illumination, communication, detection, medical treatment, information storage, processing, weapon.Wherein, the interference of light technology is used at large, and the generation condition of the interference of light is: the light frequency that two bundles interfere is identical, direction of vibration is identical and constant phase difference.Based on above-mentioned condition, invented multiple interference mode, wherein, the method for utilizing polarized light interference very ripe quilt is used.The principle of polarized light interference as shown in Figure 1a.
referring to Fig. 1 a, a branch of direction of vibration is that the polarized light of OP direction is propagated along the OZ direction, normal incidence is to wave plate 1, this polarized light will be divided into two-beam L1 and the L2 with different velocity of propagation after entering wave plate 1, and the electric vector of this two-beam L1 and L2 is vibrated on two orthogonal directionss perpendicular to circle wave plate 1 normal direction, referring to Fig. 1 a, the direction of vibration of the first polarized light L1 is the OX direction, the direction of vibration of the second polarized light L2 is the OY direction, this two-beam L1 and L2 have certain phase differential after wave plate 1 outgoing, add an analyzer 2 in wave plate 1 back, this two-beam L1 and L2 just can interfere phenomenon on the axis of homology of analyzer 2.
The structural representation of existing transmission-type interferometer is referring to Fig. 1 b, and the transmission-type interferometer comprises the first Amici prism 2 and the second Amici prism 3, first wave plate 4, second wave plate 6 and compensating unit 5.First wave plate 4, the first polarization spectroscope 2, compensating unit 5, the second polarization spectroscope 3 and second wave plate 6 are arranged in turn.The principle of above-mentioned transmission-type interferometer is as follows: be transmitted through after the linearly polarized light of incident changes polarization state through first wave plate 4 on the polarization beam splitter (scheming not shown) in the first Amici prism 2, polarization beam splitter is divided into two-way light according to the polarisation of light characteristic with light, be transmitted light L3 and reflected light L4, outgoing after transmission and reflection respectively, wherein transmitted light L3 is through on the polarization beam splitter (scheming not shown) in outgoing to the second Amici prism 3 after compensating unit 5.Simultaneously, on the film that is all-trans after reflected light L4 reflects through the film that is all-trans in direct outgoing to the second Amici prism 3, then, on outgoing to the second wave plate 6, interfere on the light transmission shaft of second wave plate 6 after reflected light L4 and transmitted light L3 synthetic a tunnel.
There is following problem at least in existing interferometer: existing interferometer must use two Amici prisms could realize its function, and Amici prism processing and manufacturing cost is high.Make the processing and manufacturing cost of existing interferometer also high.In addition, be positioned at the both sides of interferometer due to incident light and interference light, carry the incident light collimating apparatus of incident light and the emergent light reception collimating apparatus of reception interference light also can only be positioned at the both sides of interferometer to interferometer, thereby make in use procedure, the size that interferometer, incident light collimating apparatus and emergent light receive collimating apparatus integral body is very large, uses very not convenient.
The utility model content
The utility model provides a kind of interference component, for reducing the manufacturing cost of existing interferometer, and guarantees to interfere quality.
The utility model provides a kind of interference component, wherein, comprising:
Support unit is used for providing support;
Spectrophotometric unit is fixed on described support unit, is used for being divided into from the incident light that the incidence point of described spectrophotometric unit polarization beam splitter is injected transmitted light and the reflected light with different polarization state, and carries out respectively transmission and reflection;
First unit that is all-trans, be fixed on described support unit, described first unit that is all-trans is positioned on described transmitted light and catoptrical light path, described first is all-trans the unit for changing described transmitted light and catoptrical polarization state, and respectively described transmitted light and reflected light are reflected back into the described incidence point place of described polarization beam splitter, described transmitted light and described reflected light are interfered after the spectrophotometric unit outgoing through described polarization beam splitter;
Compensating unit is fixed on described support unit, at described transmitted light on described spectrophotometric unit and the first light path that is all-trans between the unit; Described compensating unit is used for the phase place of compensation transmitted light.
Interference component as above, preferably,
Described first unit that is all-trans comprises carrier, first be all-trans film and the first wave plate;
Described the first wave plate is sticked on a side on described carrier, and towards described spectrophotometric unit;
Described first film that is all-trans is folded between described carrier and described the first wave plate.
Interference component as above, preferably,
Described spectrophotometric unit comprises right angle Amici prism and the second wave plate, and described polarization beam splitter is attached on the inclined-plane of described right angle Amici prism, and described the second wave plate is sticked on the right angle face as the right angle Amici prism of exit facet.
Interference component as above, preferably,
Described spectrophotometric unit also comprises first film that is all-trans, and is oppositely arranged with described polarization beam splitter, is used for described reflected light is reflexed to parallel with described transmission direction of light;
Described carrier be shaped as tabular, vertical with catoptrical incident direction with described transmitted light, and along the reverse direction of described incident direction, described transmitted light and reflected light are reflected back into described reflection of polarization film.
Interference component as above, preferably, described the first wave plate is quarter wave plate; Described the second wave plate is 1/2 wave plate.
Interference component as above preferably, also comprises:
Second unit that is all-trans is arranged on the outside that described spectrophotometric unit penetrates the exit facet of interference light after interfering, and is used for again reflexing to described spectrophotometric unit from the interference light that described exit facet penetrates.
The utility model also provides a kind of optical interleaver, wherein, comprises the interference component that incident optical collimator, emergent light collimating apparatus and the utility model provide arbitrarily;
Described incident light collimating apparatus is used for sending incident light to described interference component, and described emergent light collimating apparatus is used for receiving the interference light of described interference component output.
Optical interleaver as above, preferably,
Also comprise polarization splitting prism, be fixedly installed on the support unit of described interference component, and be positioned on the exit direction of the interference light of described interference component output.
Optical interleaver as above, preferably, the quantity of described interference component is three, three described interference components at right angles arrange on described support unit;
Wherein, the incident light of described incident light collimating apparatus output is in turn through three described interference components, then through exporting described emergent light collimating apparatus to after birefringece crystal or completely reflecting mirror reflection.
Optical interleaver as above, preferably,
The quantity of described interference component is five, and five described interference components are two parallel rows and arrange on support unit; Wherein, first row arranges two, and second row arranges three;
The incident light of described incident light collimating apparatus output passes through each described interference component of each first row and second row in turn, then exports described emergent light collimating apparatus to.
The interference component that technique scheme provides only uses an Amici prism can realize interfering, and has reduced the manufacturing cost of interference component.In addition, by the employing unit that is all-trans, make incident light inject from the plane of incidence of spectrophotometric unit, interference light penetrates from the exit facet of spectrophotometric unit; Compared with prior art, incident light and interference light no longer are positioned at the both sides of interference component, thereby make the close together of carrying the incident light collimating apparatus of incident light and receiving the emergent light reception collimating apparatus of interference light to interference component, realize in use with this, reduce the overall dimensions that interferometer, incident light collimating apparatus and emergent light receive collimating apparatus, making increases the convenience that uses.
Description of drawings
Fig. 1 a is the principle schematic of polarized light interference;
Fig. 1 b is existing structural representation of interfering instrument;
The structural representation of the interference component that Fig. 2 a provides for the utility model embodiment one;
Fig. 2 b is the schematic top plan view of Fig. 2 a;
Fig. 2 c is for using the interference strength schematic diagram of the interference component in Fig. 2 a;
The interference pattern schematic diagram that Fig. 2 d obtains for the interference component that uses in Fig. 2 a;
The structural representation of the interference component that Fig. 3 provides for the utility model embodiment two;
The principle schematic of the optical interleaver that Fig. 4 a provides for the utility model embodiment three;
The interference pattern schematic diagram that Fig. 4 b obtains for the optical interleaver that uses in Fig. 4 a;
Fig. 4 c is the principle schematic of birefringece crystal;
The structural representation of the optical interleaver that Fig. 5 provides for the utility model embodiment four;
The principle schematic of the optical interleaver that Fig. 6 a provides for the utility model embodiment five;
Fig. 6 b is two kinds of arrangements of completely reflecting mirror in Fig. 6 a;
The principle schematic of the optical interleaver that Fig. 7 provides for the utility model embodiment six.
Embodiment
Referring to Fig. 2 a or Fig. 2 b, the utility model embodiment one provides a kind of interference component 14, wherein, comprises support unit 7, spectrophotometric unit 8, first be all-trans unit 9 and compensating unit 10; Support unit 7 is used for providing support; Spectrophotometric unit 8 is fixed on described support unit 7, and the incident light that is used for injecting from the incidence point A of spectrophotometric unit 8 polarization beam splitters 81 is divided into transmitted light and the reflected light with different polarization state,, and carry out respectively transmission and reflection; First unit 9 that is all-trans is fixed on support unit 7, first unit 9 that is all-trans is positioned on transmitted light and catoptrical light path, first is all-trans unit 9 for changing transmitted light and catoptrical polarization state, and respectively described transmitted light and reflected light are reflected back into the incidence point A place of polarization beam splitter 81, transmitted light and described reflected light are interfered after spectrophotometric unit 8 outgoing through polarization beam splitter 81; Compensating unit 10 is used for the phase place of compensation transmitted light; Wherein, transmitted light and reflected light are all-trans after the reflection of unit 9 through first, interfere on the axis of homology of the wave plate 12 on the exit facet of spectrophotometric unit 8.
Support unit can be flat board, such as the flat board of glass material, ceramic material or metal material; In some cases, also can adopt non-flat structure, with propagation and the interference that is more conducive to light.
Spectrophotometric unit can adopt the be sticked mode of spectro-film of common prism, also can adopt existing spectroscopic instruments.First unit that is all-trans can adopt catoptron or carrier to add the implementation of reflectance coating, and the quantity of catoptron can or a plurality ofly be pieced together formation for one herein.Compensating unit can adopt existing light transmissive material commonly used, as glass.
the interference component that technique scheme provides, use first unit that is all-trans to replace Amici prism of the prior art, due to the first reflex that is all-trans the unit, make interference light penetrate from the exit facet of spectrophotometric unit, incident light and interference light just no longer are positioned at the both sides of interference component like this, but adjacent, thereby also make the incident light collimating apparatus of sending incident light and the emergent light collimating apparatus that receives interference light adjacently to arrange, realize in use with this, reduce interference component, incident light collimating apparatus and emergent light receive the overall dimensions of collimating apparatus, making increases the convenience that uses.
Referring to Fig. 2 a or Fig. 2 b, the below introduces the first preferred implementation that is all-trans the unit: first unit 9 that is all-trans comprises carrier 22, first be all-trans film 23 and the first wave plate 11; Described the first wave plate 11 is sticked on a side on described carrier 22, and towards described spectrophotometric unit 8; Described first film 23 that is all-trans is folded between described carrier 22 and described the first wave plate 11.
Carrier is such as for being tabular or being pieced together the bending shape that forms etc. by a plurality of flat boards.
, selecting according to actual needs the thickness of the first wave plate 11 herein, is to treat the quarter wave plate of one of four parts of the interference light wavelength such as adopting thickness.The thickness of the first wave plate 11 determines by the interference pattern wished to get, take the wave plate of selecting above-mentioned thickness as example, but is not limited to this in the present embodiment.
Adopt first of the above-mentioned implementation unit that is all-trans, simple in structure, low cost of manufacture is convenient to utilization and extention.
Referring to Fig. 2 a or Fig. 2 b, the below introduces the preferred implementation of spectrophotometric unit: described spectrophotometric unit 8 comprises right angle Amici prism 24 and the second wave plate 12; Polarization beam splitter 81 is attached on the inclined-plane of right angle Amici prism 24, and described the second wave plate 12 is sticked on the right angle face as the right angle Amici prism 24 of exit facet.
Adopt the structure of the spectrophotometric unit of above-mentioned implementation and the spectrophotometric unit in existing interferometer similar, so just can improve based on existing interferometer, the manufacturing cost with further reduction equipment avoids waste.
Further, the spectrophotometric unit 8 of interference component 14 also comprises first film 82 that is all-trans, and is oppositely arranged with polarization beam splitter 81, is used for reflected light is reflexed to parallel with the transmission direction of light; Carrier 22 be shaped as tabular, vertical with catoptrical incident direction with transmitted light, and along the reverse direction of incident direction, transmitted light and reflected light are reflected back into reflection of polarization film 81.
Adopt the spectrophotometric unit and first of the above-mentioned setting unit that is all-trans, simple in structure, and can take full advantage of the structure of existing interferometer; Transmitted light and reflected light can along the reverse direction reflection of incident direction, also make the compact conformation of whole interference component.
Referring to Fig. 2 b, be all-trans the unit as example take the spectrophotometric unit and first that adopts above-mentioned implementation, describe the light path course after incident light enters into the interference component that technique scheme provides in detail.
As shown in Fig. 2 b, a branch of incident light L5 impinges perpendicularly on polarization beam splitter 81 in spectrophotometric unit 8, vibration characteristics according to linearly polarized light, incident light L5 will be divided into two-way light, be transmitted light L51 and reflected light L52, propagate in the mode of transmission and reflection respectively, the transmitted light L51 and the reflected light L52 that separate have orthogonal polarization state., suppose the polarization state of transmitted light L51 for being parallel to the paper direction herein, the polarization state of reflected light L52 is perpendicular to the paper direction.
Wherein, referring in Fig. 2 b shown in arrow A 1, transmitted light L51 is incident on the unit 9 that is all-trans through after compensating unit 10.Due to the first effect of being all-trans unit 9, transmitted light L51 returns to former road.Transmitted light L51 understands twice through the first wave plate 11, and at this moment, the polarization state of transmitted light L51 changes, and take the first wave plate 11 as quarter wave plate as example, the polarization direction of transmitted light L51 becomes perpendicular to the paper direction by being parallel to the paper direction.The transmitted light L51 that has changed polarization state turns back in spectrophotometric unit 8 through after compensating unit 10 again.Take the first wave plate as example as quarter wave plate, due to change of polarized direction, this transmitted light L51 is reflected, and penetrates from the exit facet of spectrophotometric unit 8.
Referring in Fig. 2 b shown in arrow A 2, simultaneously, transmitted light L52 reflexes to first through polarization beam splitter 81 and is all-trans after film 82, and outgoing to the first is all-trans on unit 9, then is reflected back toward in spectrophotometric unit 8.Take the first wave plate 11 as quarter wave plate as example, twice of transmitted light L52 is through after the first wave plate 11, and polarization state changes, and is parallel to the paper direction by becoming perpendicular to the paper direction.Because polarization state changes, this reflected light L52 is transmitted, and penetrates from the exit facet of spectrophotometric unit 8.
Next, the two-way light that penetrates from the exit facet of spectrophotometric unit 8 interferes at the exit facet of spectrophotometric unit 8 as one group of interference light L6.
Referring to Fig. 2 b and Fig. 2 c, the below describes the above-mentioned interference process with mathematical way: after a branch of incident light incides in interference component 14, carry out light splitting on the polarization beam splitter 81 of spectrophotometric unit 8, light amplitude is respectively: E
s, E
p, the phase differential ΔΦ that produces in interference component 14 is:
Wherein Δ L is the optical path difference of two interference arms, and wherein interfering arm is transmitted light L51 and reflected light L52, and λ is the incident light wavelength.Due to two existence of interfering the optical path difference Δ L of arms, formed the Free Spectral Range (Free spectral range:FSR) of interference component.
Wherein, c is the light velocity in vacuum.E
s, E
pOptical axis direction z and vertical optical axis direction α at the second wave plate 12 does projection respectively, at the component of the second wave plate 12 optical axis directions is: E
z1=E
sCos θ, E
z2=E
pSin θ; Component at vertical wave plate optical axis direction is E
a1=E
sSin θ, E
a2=E
pCos θ, and 12 couples of E of the second wave plate
a1And E
a2Two-beam has been introduced additive phase and has been moved π.
On the optical axis direction z of the second wave plate 12, interference strength is:
On the direction α perpendicular to the second wave plate 12 optical axises, interference strength is:
After the interference component that incident light provides by technique scheme, the interference pattern that obtains is referring to Fig. 2 d, and wherein, solid line represents the interference pattern in optical axis direction z, and dotted line represents perpendicular to the interference pattern in optical axis direction α.
The interference component that technique scheme provides by the employing unit that is all-trans, makes incident light inject from the plane of incidence of spectrophotometric unit, and interference light penetrates from the exit facet of spectrophotometric unit; Compared with prior art, only applied to an Amici prism, before having replaced, the needs of transmission-type are used the situation of two Amici prisms, have saved cost.In addition, incident light and interference light no longer are positioned at the both sides of interference component, thereby make the close together of carrying the incident light collimating apparatus of incident light and receiving the emergent light reception collimating apparatus of interference light to interference component, realize in use with this, reduce the overall dimensions that interferometer, incident light collimating apparatus and emergent light receive collimating apparatus, making increases the convenience that uses.
Further, the second wave plate 12 can be 1/2 wave plate.
The interference component that technique scheme provides compared with prior art, has only been used a polarization splitting prism, can effectively reduce the cost of whole instrument, increases the convenience that uses.
Referring to Fig. 3, the utility model embodiment two is on the technical scheme basis of embodiment one, preferably, interference component 14 also comprises second unit 19 that is all-trans, second unit 19 that is all-trans is arranged on the outside that spectrophotometric unit 8 penetrates the exit facet of interference light after interfering, and is used for and will again reflexes to described spectrophotometric unit 8 from the interference light that described exit facet penetrates.
Arrange second and be all-trans behind the unit, interference light can enter interference component again, to carry out primary modulation again.
Referring to Fig. 3, the below introduces the second preferred implementation that is all-trans the unit: described second unit 19 that is all-trans is triangular prism.
Second of the above-mentioned implementation cellular construction compactness that is all-trans is convenient to make processing.
In practical application, can be as required, the devices such as the wave plate by adding special parameter and triangular prism are expanded the function of this above-mentioned interference assembly, to control the number of times that each road light comes and goes and control the outgoing direction of light in this interference component.For example, on the technical scheme basis of above-described embodiment, then increase the total reflection device, the light of last outgoing in said process is reflected back in this interference component again, after such processing, can further utilize this interference component, and can save the space.By top description as can be known, realized repeatedly coming and going and interfering of light in an interference component, compared with prior art, technique scheme effectively reduction printer body is long-pending, reduces the cost of whole instrument, increases the convenience that uses.
Referring to Fig. 4 a and Fig. 4 b, the utility model embodiment three provides a kind of optical interleaver, and wherein, optical interleaver comprises the interference component 14 that incident optical collimator 15, emergent light collimating apparatus 16 and the utility model any embodiment provide; Described incident light collimating apparatus 15 is used for sending incident light to described interference component 14, and described emergent light collimating apparatus 16 is used for receiving the interference light of described interference component 14 outputs.The interference pattern of Fig. 4 c for using the optical interleaver shown in Fig. 4 a to obtain.
The Amici prism quantity that the optical interleaver that technique scheme provides, interference component use is few, can effectively reduce the cost of optical interleaver.
Further, optical interleaver also comprises polarization splitting prism 13, is fixedly installed on the support unit 7 of interference component 14, and is positioned on the exit direction of the interference light of interference component 7 output.
Referring to Fig. 4 a, in the present embodiment, particularly, the quantity of interference component 14 is three, and three described interference components 14 at right angles arrange on described support unit 7; Wherein, the incident light of described incident light collimating apparatus 15 outputs is in turn through three described interference components 14, light after interfering through three described interference components 14 is incident in polarization splitting prism 13, exports described emergent light collimating apparatus 16 through the light after institute's polarization splitting prism 13 light splitting to through birefringece crystal 17.
In the present embodiment, to be provided with three interference components 14 as example, wherein, three interference components 14 are
Type distribute to arrange, and flat board roughly is divided into four zones, is designated as A1, A2, A3 and A4 along pointer, and wherein, the A1 region division has parallel incident light collimating apparatus 15 and emergent light collimating apparatus 16, A2-A4 zone to be respectively arranged with an interference component 14.
Herein, the quantity of birefringece crystal 17 is three, and one of them is used in the exit portal outside of incident light collimating apparatus 15, and two other birefringece crystal 17 is used in the outside, entrance port of emergent light collimating apparatus 16.Referring to Fig. 4 c, the principle of birefringece crystal 17 is that light beam is divided into two bundle directional lights, or with the two synthetic light beams of bundle directional light.Herein, the effect of birefringece crystal 17 is: the birefringece crystal 17 in the incident light collimating apparatus 15 entrance ports outsides is that incident light is split up into independently linearly polarized light of two-way, after modulation through three interference components, the two-route wire polarized light is divided into four road light outgoing, and two birefringece crystals, 17 each linearly polarized lights with the two-way separation before emergent light collimating apparatus 16 are incorporated into a place.Then four road light are synthesized two-way light by 16 receptions of emergent light collimating apparatus.Simultaneously, for the birefringece crystal 17 in incident light collimating apparatus 15 outsides, entrance port, on birefringece crystal 17,1/2 wave plate can be set, allow wherein one road light through this wave plate, polarization state changes, this moment, the two-way polarized state of light was the same, then enter into interference component, for two birefringece crystals 17 before emergent light collimating apparatus 16, also 1/2 wave plate can be set before birefringece crystal 17, change wherein one road polarized state of light, outgoing after synthetic one road light in birefringece crystal 17 at last.
The optical interleaver that technique scheme provides, incident light is parallel with interference light, thereby makes nearer that incident light collimating apparatus and emergent light collimating apparatus can arrange, to reduce the volume of whole optical interleaver.
Referring to Fig. 5, it is different that the present embodiment four and the difference of embodiment three technical schemes have been to increase arranging of total reflective mirror 18 and A1 zone, receiving collimating apparatus 16 is two fine collimating apparatuss, and only used one and closed light birefringece crystal 17, the quantity of interference component 14 is three, and three described interference components 14 at right angles arrange on described support unit 7; Wherein, the incident light of described incident light collimating apparatus 15 outputs then through three described interference components 14 before after completely reflecting mirror 18 reflections, light being reflected back again, exports described emergent light collimating apparatus 16 at last in turn through three described interference components 14.In the present embodiment, three interference components 14 also are
Type distributes and arranges
in the present embodiment, after interference light arrives completely reflecting mirror 18, can be reflected, thereby again through three interference components 14, be equivalent to pass through six interference components 14 from the incident light of incident light collimating apparatus 15 outputs, referring to Fig. 5, concrete light path is: interference component 14 → polarization splitting prism 13 → birefringece crystal 17 → emergent light collimating apparatus 16 in interference component 14 → A2 zone in interference component 14 → A3 zone in interference component 14 → completely reflecting mirror 18 → A4 zone in interference component 14 → A4 zone in interference component 14 → A3 zone in incident light collimating apparatus 15 → birefringece crystal, 17 → A2 zone.
The optical interleaver that technique scheme provides can access the interference light of more times modulation, and the compact conformation of whole optical interleaver, and is easy-to-use.
Referring to Fig. 6 a and Fig. 6 b, the utility model embodiment five is with the difference of above-described embodiment, and the quantity of interference component 14 is different with arrangement mode, in the present embodiment, has used two interference components 14 and a transmission-type interferometer 25, and above-mentioned three assemblies are
Type distributes and arranges.In the present embodiment, interference light will be reflected back through the light of three assemblies in three assemblies again by completely reflecting mirror 18, then export emergent light collimating apparatus 16 to.Herein, the placement location of completely reflecting mirror 18 and direction also have different from other embodiment, consequently allow the light walked clockwise different from wave plate type and the position of the light process of returning counterclockwise, simultaneously, the size of completely reflecting mirror 18 determines to come and go the degree of separation of light, thereby has determined the riding position of last emergent light collimating apparatus 16.In Fig. 6 a, also be provided with Amici prism 26, interference light was introduced in Amici prism 26 before entering birefringece crystal 17, according to the polarization state difference to be divided into multi-beam.
Referring to Fig. 6 a, concrete light path is: interference component 14 → transmission-type interferometer 25 → Amici prism 26 → emergent light collimating apparatus 16 in interference component 14 → A2 zone in interference component 14 → completely reflecting mirror 18 → A3 zone in interference component 14 → A3 zone in incident light collimating apparatus 15 → transmission-type interferometer 25 → A2 zone.
Fig. 6 b is two kinds of possible arrangements of completely reflecting mirror 18.
Adopt the optical interleaver of above-mentioned setting, can realize that light repeatedly comes and goes in three assemblies of realizing interfering, and according to actual needs, can arrange final eye point, can do flexible arrangement to one-piece construction.
Referring to Fig. 7, the utility model embodiment six is with the difference of above-described embodiment, and the quantity of interference component 14 is different with arrangement mode, in the present embodiment, the quantity of described interference component 14 is five, and five described interference components 14 are two parallel rows and arrange on support unit 7; Wherein, first row arranges two, and second row arranges three; The incident light of described incident light collimating apparatus 15 outputs passes through each described interference component 14 of each first row and second row in turn, then exports described emergent light collimating apparatus 16 to.
In the present embodiment, the principle of the light path course of incident light is identical with other embodiment's, and this repeats no more.
Adopt the optical interleaver of above-mentioned setting, can obtain the flat-top bandwidth wider, isolation is higher, the better interference pattern of symmetry.
It should be noted that at last: above each embodiment is not intended to limit only in order to the technical solution of the utility model to be described; Although with reference to aforementioned each embodiment, the utility model is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps some or all of technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the scope of each embodiment technical scheme of the utility model.
Claims (10)
1. an interference component, is characterized in that, comprising:
Support unit is used for providing support;
Spectrophotometric unit is fixed on described support unit, is used for being divided into from the incident light that the incidence point of described spectrophotometric unit polarization beam splitter is injected transmitted light and the reflected light with different polarization state, and carries out respectively transmission and reflection;
First unit that is all-trans, be fixed on described support unit, described first unit that is all-trans is positioned on described transmitted light and catoptrical light path, described first is all-trans the unit for changing described transmitted light and catoptrical polarization state, and respectively described transmitted light and reflected light are reflected back into the described incidence point place of described polarization beam splitter, described transmitted light and described reflected light are interfered after the spectrophotometric unit outgoing through described polarization beam splitter;
Compensating unit is fixed on described support unit, at described transmitted light on described spectrophotometric unit and the first light path that is all-trans between the unit; Described compensating unit is used for the phase place of compensation transmitted light.
2. interference component according to claim 1, is characterized in that,
Described first unit that is all-trans comprises carrier, first be all-trans film and the first wave plate;
Described the first wave plate is sticked on a side on described carrier, and towards described spectrophotometric unit;
Described first film that is all-trans is folded between described carrier and described the first wave plate.
3. interference component according to claim 2, is characterized in that,
Described spectrophotometric unit comprises right angle Amici prism and the second wave plate, and described polarization beam splitter is attached on the inclined-plane of described right angle Amici prism, and described the second wave plate is sticked on the right angle face as the right angle Amici prism of exit facet.
4. interference component according to claim 3 is characterized in that:
Described spectrophotometric unit also comprises first film that is all-trans, and is oppositely arranged with described polarization beam splitter, is used for described reflected light is reflexed to parallel with described transmission direction of light;
Described carrier be shaped as tabular, vertical with catoptrical incident direction with described transmitted light, and along the reverse direction of described incident direction, described transmitted light and reflected light are reflected back into described reflection of polarization film.
5. interference component according to claim 4, is characterized in that, described the first wave plate is quarter wave plate; Described the second wave plate is 1/2 wave plate.
6. interference component according to claim 1, is characterized in that, also comprises:
Second unit that is all-trans is arranged on the outside that described spectrophotometric unit penetrates the exit facet of interference light after interfering, and is used for again reflexing to described spectrophotometric unit from the interference light that described exit facet penetrates.
7. an optical interleaver, is characterized in that, comprises the arbitrary described interference component of incident optical collimator, emergent light collimating apparatus and claim 1-6;
Described incident light collimating apparatus is used for sending incident light to described interference component, and described emergent light collimating apparatus is used for receiving the interference light of described interference component output.
8. optical interleaver according to claim 7, is characterized in that,
Also comprise polarization splitting prism, be fixedly installed on the support unit of described interference component, and be positioned on the exit direction of the interference light of described interference component output.
9. optical interleaver according to claim 7, is characterized in that, the quantity of described interference component is three, and three described interference components at right angles arrange on described support unit;
Wherein, the incident light of described incident light collimating apparatus output is in turn through three described interference components, then through exporting described emergent light collimating apparatus to after birefringece crystal or completely reflecting mirror reflection.
10. optical interleaver according to claim 7, is characterized in that,
The quantity of described interference component is five, and five described interference components are two parallel rows and arrange on support unit; Wherein, first row arranges two, and second row arranges three;
The incident light of described incident light collimating apparatus output passes through each described interference component of each first row and second row in turn, then exports described emergent light collimating apparatus to.
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| CN 201220382045 CN202948210U (en) | 2012-08-03 | 2012-08-03 | Interference assembly and optical comb filter |
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| CN 201220382045 CN202948210U (en) | 2012-08-03 | 2012-08-03 | Interference assembly and optical comb filter |
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| CN202948210U true CN202948210U (en) | 2013-05-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103576330A (en) * | 2012-08-03 | 2014-02-12 | 诺方（哈尔滨）科技股份有限公司 | Interference assembly and optical comb filter |
| CN105093366A (en) * | 2014-04-30 | 2015-11-25 | 诺方（哈尔滨）科技股份有限公司 | Polarization beam splitting prism, fundamental wave interference unit and comb wave separator |
-
2012
- 2012-08-03 CN CN 201220382045 patent/CN202948210U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103576330A (en) * | 2012-08-03 | 2014-02-12 | 诺方（哈尔滨）科技股份有限公司 | Interference assembly and optical comb filter |
| CN103576330B (en) * | 2012-08-03 | 2016-08-17 | 诺方（哈尔滨）科技股份有限公司 | Interference component and optical interleaver |
| CN105093366A (en) * | 2014-04-30 | 2015-11-25 | 诺方（哈尔滨）科技股份有限公司 | Polarization beam splitting prism, fundamental wave interference unit and comb wave separator |
| CN105093366B (en) * | 2014-04-30 | 2017-11-14 | 诺方（哈尔滨）科技股份有限公司 | Polarization splitting prism, fundamental wave interference unit and Interleaver |
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Effective date of registration: 20170207 Address after: 300021 Heping District, Tianjin City, the new world garden 5-5-602 Patentee after: Zhang Mengmeng Address before: High tech Zone 150078 in Heilongjiang province Harbin City Yingbin Road District East Lake Street No. 8 side Patentee before: Connaught square (Harbin) Polytron Technologies Inc |
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Granted publication date: 20130522 Termination date: 20180803 |