CN103424896A - Optical path control device - Google Patents
Optical path control device Download PDFInfo
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- CN103424896A CN103424896A CN2013103935317A CN201310393531A CN103424896A CN 103424896 A CN103424896 A CN 103424896A CN 2013103935317 A CN2013103935317 A CN 2013103935317A CN 201310393531 A CN201310393531 A CN 201310393531A CN 103424896 A CN103424896 A CN 103424896A
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Abstract
The invention provides an optical path control device. The optical path control device comprises a first optical fiber collimator and a second optical fiber collimator. A first light-splitting light-combining device, a first half wave plate component, a light rotating component, a second half wave plate component and a second light-splitting light-combining device are sequentially arranged between the first optical fiber collimator and the second optical fiber collimator. The outer end of the first optical fiber collimator and the outer end of the second optical fiber collimator are respectively provided with a plurality of ports, wherein the ports are arranged in parallel. The ports form ports of more than two optical path devices, the number of the ports of each optical path device is more than three, and each optical path device comprises at least one port which is located at the outer end of the first optical fiber collimator and at least one port at the outer end of the second optical fiber collimator. The optical path control device can realize integration of an optical circulator and a magneto-optical switch, and lower the production cost and the optical circulator and the production cost of the magneto-optical switch.
Description
Technical field
The present invention relates to a kind of optical device for optical fiber telecommunications system, specifically, relate to a kind of light path control device.
Background technology
A large amount of light path control devices that use in modern optical fiber telecommunications system, as optical circulator and magneto-optic shutter etc.Optical circulator and magneto-optic shutter be all for light path is controlled, and as controlled the port outgoing from the light beam of a port incident from another appointment, thereby realizes control and the selection of light path.
Optical circulator is the irreversible optical passive component of a kind of light path, the optical circulator that most typical common application is three ports and the ring of light device of four ports.Because the light path of optical circulator is to incide the second port outgoing from the first port, incide the 3rd port outgoing from the second port, and can not be from the first port outgoing from the light beam of the second port incident, can not be from the second port outgoing from the light beam of the 3rd port incident.
Early stage optical circulator is mainly used on bidirectional optical, and using the first port as the port of uploading signal, the 3rd port is as the port of download signal.Function based on the optical circulator uniqueness, its wavelength-division multiplex at optical-fiber network (WDM), Erbium-Doped Fiber Amplifier (EDFA) (EDFA), dispersion compensation and optical time domain reflectometer be first-class has all obtained application.
Yet, due to the high manufacturing cost of optical circulator, allow most of equipment vendors are careful to be selected, cause optical circulator not applied widely for many years.Due to the explosive growth of network communication capacity and network data transmission speed in recent years, equipment vendors find the function of optical circulator uniqueness be can't with other form device and equipments substitute or alternative cost taller, the demand of focus ring shape device increases suddenly, also more strong to the requirement of optical circulator cheaply.
Development through time decades, the structure of optical circulator is updated, as U.S. Pat 5930039 and the notification number Chinese patent that is CN2487161Y, CN1356786A discloses the optical circulator of different structure, the disclosed optical circulator of above-mentioned patent is current very ripe optical circulator, and its technological means is to adopt different optical elements to couple light in double-fiber collimator mostly.
Yet, development along with the communication technology, from reducing costs and reduce the consideration of bulk, the Array Design of focus ring shape device or Integrated design are obviously a kind of urgent trend, and relevant patent is disclosed as U.S. Pat 20020097957A1, US6580842B1.In addition, U.S. Patent application US20020097957A1 discloses the optical circulator array that adopts the lenticule display.
As shown in Figure 1, the optical circulator array has collimator array 11,21, and be provided with angle of wedge prism 12,20, the inboard of angle of wedge prism 12,20 is provided with birefringece crystal 13,19, the inboard of birefringece crystal 13,19 is provided with Faraday rotation sheet 14,17, Faraday rotation sheet 14,17 inboards are provided with half- wave plate 15,18, and is the birefringece crystal 16 of realizing annular light path between half-wave plate 15, Faraday rotation sheet 17.
And for example, U.S. Pat 6580842B1 discloses another kind of optical circulator array, referring to Fig. 2, this array adopts Planar Lightwave Circuit Technology, and the nonreciprocity unit that will realize annular light path is integrated on a substrate 31, be coupled by optical fibre array, a plurality of circulators unit is arranged on substrate 31.Be furnished with many one optical waveguides 38 on substrate 31, carve a plurality of grooves 32,33,34,35 by the modern precision semiconductor technology on substrate 31, will realize that the nonreciprocity cellular installation of optical circulator is in groove 32,33,34,35.And, adopt index matching tackifier gluing between optical waveguide 38 and circulator nonreciprocity unit.
But, the nonreciprocity ring of light device unit of this optical circulator array still adopts expensive crystalline material to make, need on substrate 31, etch a plurality of grooves 32,33,34,35, this precision and technological requirement to processing is also high, causes the production cost of optical circulator array high simultaneously.
Magneto-optic shutter switches for the selection that realizes light beam between an input optical fibre and a plurality of output optical fibre or a plurality of input optical fibre and output optical fibre, and it is mainly used in modern optical fiber communication industry, instrument and meter industry and national defense industry.
The most ripe magneto-optic shutter technology is to utilize magnetic field to control the magneto-optic shutter of the annular light path realization of magneto-optical crystal rotation at present.The utility model that is CN2896323Y as notification number discloses the innovation and creation of a kind of " compacted 1 X 2 magnetic-optical switch " by name, this magneto-optic shutter has single optical fiber calibrator, at single optical fiber calibrator, an optical fiber is installed, and also be provided with successively the first birefringece crystal by optical path direction, the first half-wave plate assembly, first faraday's revolving fragment, birefringece crystal light guide, the birefringece crystal light beam deflector, the second Faraday rotation sheet, the second half-wave plate assembly, the second birefringece crystal and double-fiber collimator, two parallel optical fiber are installed in double-fiber collimator, be respectively equipped with the magnetic field producer part outside two Faraday rotation sheets, for to the Faraday rotation sheet, loading variable magnetic field, thereby change the direction of light path.
Yet also there is the problem that integrated degree is inadequate in existing magneto-optic shutter, this causes the volume of communication device too huge, also is unfavorable for reducing the production cost of communication device.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of small volume, light path control device that degree of integration is high realized.
In order to realize above-mentioned fundamental purpose, light path control device provided by the invention comprises the first optical fiber collimator and the second optical fiber collimator, be disposed with the first light splitting splicer part between the first optical fiber collimator and the second optical fiber collimator, the first half-wave plate assembly, the optically-active assembly, the second half-wave plate assembly and the second light splitting splicer part, wherein, the outer end of the outer end of the first optical fiber collimator and the second optical fiber collimator is respectively equipped with a plurality of ports that are arranged side by side, a plurality of ports form the port of the light path devices more than two or two, the quantity of the port of each light path devices is more than three, and each light path devices comprises at least one port that is positioned at the first optical fiber collimator outer end and is positioned at least one port of the second optical fiber collimator outer end.
From such scheme, due to integrated a plurality of ports in each optical fiber collimator, and two light path devices are used respectively incident port or the exit ports of these ports as light beam, a plurality of like this light path devices can realize respectively the function of beam Propagation in same light path control device, thereby realize the integrated of optical circulator or magneto-optic shutter, reduce the production cost of light path control device, also reduce its volume.
A preferred scheme is, two Faraday rotation sheets that the optically-active assembly has refractive element and is positioned at the refractive element both sides, or the optically-active assembly has spaced apart two refractive element and two Faraday rotation sheets.
As can be seen here, the polarization state by the Faraday rotation sheet to light beam is rotated, and by refractive element, deviation is carried out in the direction of propagation of light beam, thereby simply, effectively realizes the control of beam direction.
Further scheme is that the optically-active assembly also has the magnetic field producer part that applies fixed-direction magnetic field to the Faraday rotation sheet.
Visible, load the magnetic field of fixed-direction to the Faraday rotation sheet by the magnetic field producer part, the light path control device is realized the function of optical circulator.
Optional scheme is that the optically-active assembly also has the magnetic field producer part that applies direction-changeable magnetic field to the Faraday rotation sheet.
As can be seen here, the direction in the magnetic field produced by change magnetic field producer part, the polarization direction of control light beam, the light path control device can be used as magneto-optic shutter and uses.
Further scheme is, the quantity of the port of each light path devices is three, and two ports of each light path devices are positioned at the outer end of the first optical fiber collimator, and another port of each light path devices is positioned at the outer end of the second optical fiber collimator.
Visible, when the light beam of two light path devices transmits in optical fiber collimator and other devices, light beam can the phase mutual interference, the light beam of two light path devices intersects but is independent of each other in the optically-active assembly, when guaranteeing the beam Propagation quality, can realize the integrated of light path control device again.
The accompanying drawing explanation
Fig. 1 is the structural representation of existing a kind of optical circulator array.
Fig. 2 is the structural representation of existing another kind of optical circulator array.
Fig. 3 is the structural representation of first embodiment of the invention.
Fig. 4 is the structure enlarged diagram of two optical fiber collimators in first embodiment of the invention.
Fig. 5 is the optical texture vertical view of first embodiment of the invention.
Fig. 6 is the optical texture amplification plan view of optically-active assembly in first embodiment of the invention.
The schematic diagram of light polarization when Fig. 7 is first embodiment of the invention work.
Fig. 8 is the structural drawing of refractive element the first replacement scheme in first embodiment of the invention.
Fig. 9 is the structural drawing of refractive element the second replacement scheme in first embodiment of the invention.
Figure 10 is the optical texture vertical view of second embodiment of the invention.
Figure 11 is the optical texture vertical view of third embodiment of the invention.
Figure 12 is the structure enlarged diagram of two optical fiber collimators in third embodiment of the invention.
Figure 13 is the optical texture vertical view of fourth embodiment of the invention.
Figure 14 is the structure enlarged diagram of two optical fiber collimators in fourth embodiment of the invention.
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment
Light path control device of the present invention is optical circulator array or magneto-optic shutter array, in a light path control device, realizes the function of a plurality of optical circulators or a plurality of magneto-optic shutters, thereby realizes the integrated of optical circulator or magneto-optic shutter.Because each light path control device can be realized the function of two or more optical circulator or magneto-optic shutter, so the light path devices of indication of the present invention is an optical circulator or a magneto-optic shutter.The optical circulator array of below take describes light path control device of the present invention as embodiment.
The first embodiment:
Referring to Fig. 3, the light path control device of the present embodiment is an optical circulator array, and it has the optical fiber collimator 101 that is positioned at device one end, and four optical fiber 116 are installed in optical fiber collimator 101.The other end at device is provided with another optical fiber collimator 111, and two optical fiber 117 are installed in optical fiber collimator 111.
One end of each root optical fiber 116,117 all stretches out outside optical fiber collimator 101,111, so each root optical fiber 116,117 forms respectively the port of light beam incident, outgoing.In the present embodiment, with 1A, 2A, 3A, 1B, 2B, 3B, carry out six ports of mark, wherein port one A, 2A, 3A are for forming three ports of first light path devices, and port one B, 2B, 3B are for forming three ports of second light path devices.
Visible, the light path control device of the present embodiment can be realized the function of the optical circulator of two three ports, and three ports of first optical circulator are respectively 1A, 2A, 3A, and three ports of second optical circulator are respectively 1B, 2B, 3B.This require light beam from port one A incident from port 2A outgoing, and, from the light beam of port 2A incident from port 3A outgoing, do not allow light beam from port 2A incident from port one A outgoing, do not allow light beam from 3A incident and from port 2A outgoing yet.In the same manner, light beam from port 2B outgoing, and, from the light beam of port 2B incident from port 3B outgoing, does not allow light beam from port 2B incident from port one B outgoing from port one B incident, does not allow light beam from 3B incident and from port 2B outgoing yet.
As seen from Figure 4, optical fiber collimator 101 and optical fiber collimator 111 positioned opposite, and four optical fiber 117 in optical fiber collimator 101 are arranged side by side, and are arranged in straight line, and along its axis, be arranged symmetrically with optical fiber collimator 101 is interior.Two adjacent close arrangement in four optical fiber 116, the gap between two adjacent optical fiber 116 is very little.
Two optical fiber 117 in optical fiber collimator 111 also are arranged side by side, and are arranged in straight line, and along its axis, are arranged symmetrically with optical fiber collimator 111 is interior, and two optical fiber 117 are also close arrangement.
And, be positioned at the outer end of optical fiber collimator 101 as two port one A, 3A of first optical circulator, also be positioned at the outer end of optical fiber collimator 101 as two port one B, 3B of second optical circulator, and four port intervals of two optical circulators are arranged, be a port 3A of first optical circulator between two port one B, 3B of second optical circulator, a port one B of second optical circulator is between two port one A, 3A of first optical circulator.
Review Fig. 3, between optical fiber collimator 101 and optical fiber collimator 111, along optical path direction, be disposed with birefringece crystal 102, half-wave plate assembly, optically-active assembly, second half wave plate assembly and birefringece crystal 110.Birefringece crystal 102,110 is the light splitting splicer part of the present embodiment, for light beam being carried out to light splitting or closing light.A branch of light beam will be divided into the orthogonal two light beams of polarization state after birefringece crystal 102 or 110, as the orthogonal light beam of two bundle polarization states can be merged into a branch of light beam after birefringece crystal 102 or 110.
In the present embodiment, be positioned at the other half-wave plate assemblies of birefringece crystal 102 and have a half-wave plate 103, half-wave plate 103 is positioned at from the two-way light beam of birefringece crystal 102 outgoing wherein a road light path.As seen from Figure 3, half-wave plate 103 is positioned at lower end one side near birefringece crystal 102.
Be positioned at birefringece crystal 110 other half-wave plate assemblies and there is a half-wave plate 109 and a block compensation sheet 108, half-wave plate 109 is positioned on the light path with the same road of half-wave plate 103 light beam, and compensating plate 108 is positioned on the light path at another light beam place, road relative with half-wave plate 109 place light beams.As seen from Figure 3, half-wave plate 109 is positioned at the side near birefringece crystal 110 lower ends, and compensating plate 108 is positioned at the side near birefringece crystal 110 upper ends.
103,109 pairs of light beams of half-wave plate have the phase delay effect, and light beam will postpone through half-wave plate 103,109 rear phase places, thereby change the polarization state of light beam.In the present embodiment, light beam is half phase place through half-wave plate 103,109 rear phase delays, and the deflection of 90 ° will occur in polarization direction.
In the present embodiment, the angle of the polarization direction of the optical axis angle by setting half-wave plate 103,109 and the linearly polarized photon that incides half-wave plate 103,109, can realize 90 ° of rotations of the polarization state of 103,109 pairs of linearly polarized photons of half-wave plate.In other use occasion, by changing the optical axis direction of half-wave plate, linearly polarized photon is through not necessarily 90 ° of the polarization direction anglecs of rotation after half-wave plate, but other angle.
Compensating plate 108 plays the effect of polarization mode dispersion compensation in the light path control device of the present embodiment.
The optically-active assembly has refractive element, and in the present embodiment, refractive element is comprised of two Wollaston prisms 105,106, and the optical axis of two Wollaston prisms 105,106 is mutually vertical.Be respectively arranged with Faraday rotation sheet 104,107 at the two ends of Wollaston prism 105,106, wherein Faraday rotation sheet 104 is arranged on the side near half-wave plate 103, and Faraday rotation sheet 107 is arranged on the side near half-wave plate 109.
Be provided with magnetic field producer part 112,113 outside Faraday rotation sheet 104,107, for load the magnetic field of fixed-direction to Faraday rotation sheet 104,107, so magnetic field producer part 112,113 can be used permanent magnet to realize.
Referring to Fig. 5, the present embodiment is used solid line to mean the light path of first optical circulator, uses dotted line to mean the light path of second optical circulator.The light beam that is arbitrary polarized direction from the polarization state of port one A incident incides birefringece crystal 102 after optical fiber collimator 101, resolves into the orthogonal two light beams of polarization state.The optical axis of birefringece crystal 102 in XOY plane, and with the equal angle at 45 ° of X-axis and Y-axis.The a branch of light beam be decomposed to form is extraordinary ray, and its polarization direction is parallel to Y-axis, and from the upper end one side outgoing near birefringece crystal 102.Another light beams is ordinary light, and its polarization direction is parallel to X-axis, and from close birefringece crystal 102 lower end one side outgoing.
The polarization direction of light beam in each optical device of light path control device as shown in Figure 7, wherein be arranged on Fig. 7 row and mean the variation from the light beam of port one A or 1B incident to port 2A or 2B outgoing process polarization direction, lower row mean from the light beam of port 2A or 2B incident to port 3A or 3B outgoing process the variation of polarization direction, arrow in Fig. 7 means the transmission direction of light beam, the label that the label of Fig. 7 the top is corresponding optical device.
From a branch of light beam of birefringece crystal 102 outgoing directly into being incident upon Faraday rotation sheet 104.Another light beams is incident to Faraday rotation sheet 104 after half-wave plate 103, and the polarization direction of therefore inciding Faraday rotation sheet 104 front two light beams is identical.45 ° of rotations occur through rear its polarization direction of Faraday rotation sheet 40 in two light beams, and turn clockwise 45 ° in Shi ZaiYOZ plane, polarization direction.
In the present embodiment, magnetic field producer part 112 loads magnetic direction to Faraday rotation sheet 104 and fixes, so the direction of the polarization direction of light beam rotation is also fixed.Two light beams is incident to subsequently the rear direction of propagation of Wollaston prism 105,106 deviation occurs, in the XOZ plane to Z axis negative direction translation certain distance.Subsequently, two light beams deflects again through Faraday rotation sheet 107 rear polarizer states, will continue in the YOZ plane, to turn clockwise 45 °, and now the polarization direction of two light beams is parallel to Z axis.
Then, wherein a branch of light beam is through compensating plate 108, and polarization state can not change, and is only the delay that a phase place occurs.Another light beams is through half-wave plate 109, and the rotation of 90 ° occurs in its polarization direction, and now the polarization direction of two light beams is mutually vertical.Finally, two light beams is closed light after being incident to birefringece crystal 110, from the port 2A outgoing of optical fiber collimator 111.
Resolve into the orthogonal two light beams in polarization direction from the light beam of port 2A incident after birefringece crystal 110, and two light beams, through Faraday rotation sheet 107 rear polarizer directions, the rotation of 45 ° occurs, two light beams incides after Wollaston prism 106,105 in the XOZ plane to Z axis negative direction translation certain distance.The rotation of 45 ° occurs through Faraday rotation sheet 104 rear polarizer directions in two light beams again, and closes light from port 3A outgoing in birefringece crystal 102.Visible, can be from port one A outgoing from the light beam of port 2A incident, but from port 3A outgoing, thereby realize annular light path.
Process from the light beam of port one B incident to port 2B outgoing, identical with said process to the process of port 3B outgoing from the light beam of port 2B incident, repeat no more.
Yet, if port one A and port one B have light beam incident simultaneously, from the light beam of port one A incident and the light beam from port one B incident, will intersect at the adjacent surface of Wollaston prism 105,106, as shown in Figure 6.The light beam of original first optical circulator near the Z axis positive dirction is after the adjacent surface of Wollaston prism 105,106, along propagating near the Z axis negative direction, and the light beam of original second optical circulator near the Z axis negative direction is after the adjacent surface of Wollaston prism 105,106, along propagating near the Z axis positive dirction, thereby arrive respectively port one A, 1B.
This is larger because of the angle of the adjacent surface of the transmission direction of the light beam from port one A incident and Wollaston prism 105,106, and the angle that deviation occurs this light beam on adjacent surface is also larger.And less from the angle of the adjacent surface of the transmission direction of the light beam of port one B incident and Wollaston prism 105,106, the angle that deviation occurs this light beam on adjacent surface is also less, this is similar to the refraction principle of light, forms a certain proportion of relation between incident angle and refraction angle.
But the transmission that the two light beams of intersection occurs can't be interfered mutually, thereby do not affect the quality of beam Propagation.
Like this, a plurality of ports of integrated two optical circulators in a light path control device, realize the function of two optical circulators realizing the integrated of optical circulator, reduces the production cost of optical circulator.
Certainly, the Wollaston prism 105,106 in the optically-active assembly can be substituted by other devices, as shown in Figure 8, uses Rochon prism to substitute, and Rochon prism is comprised of the prism 131,132 of two adjacency, and the optical axis of two prisms is mutually vertical.Or, as shown in Figure 9, refractive element is substituted by the angle of wedge prism 135,136 of two adjacency, and the optical axis of two angle of wedge prisms 135,136 is also mutually vertical, can also be Wollaston prism 105,106 wherein arbitrary prism by isotropic optical lens luminescent material, made.
In the optically-active assembly, 104,107 and two Wollaston prisms 105,106 of two Faraday rotation sheets can be that interval is arranged, can arrange successively Faraday rotation sheet 104, Wollaston prism 105, Faraday rotation sheet 107 and Wollaston prism 106 along optical path direction, now the optical axis of Wollaston prism 105,106 and the optical axis of above-described embodiment change to some extent.
In addition, when the light path control device is realized the function of two magneto-optic shutters, and structure and said structure basically identical, what just magnetic field producer part 112,113 produced is not the fixing magnetic field of magnetic direction, but the variable magnetic field of magnetic direction.Now, each magnetic field producer part comprises the iron core of an annular, is wound with coil on iron core, loads the DC current of different directions to coil, produces the magnetic field of opposed polarity on iron core.
While using as magneto-optic shutter, light beam is from port 2A incident, and, alternatively from port one A or port 3A outgoing, this depends on the magnetic direction that the magnetic field producer part produces.In addition, light beam also can be from port 2B incident, and alternatively from port one B or port 3B outgoing.Like this, the light path control device can be the function that realizes two magneto-optic shutters, thereby realizes the integrated of magneto-optic shutter.
The second embodiment:
Referring to Figure 10, the structure of the structure of the present embodiment and the first embodiment is basically identical, it has optical fiber collimator 201 and optical fiber collimator 211, be provided with successively birefringece crystal 202, half-wave plate 203, Faraday rotation sheet 204, Wollaston prism 205,206, Faraday rotation sheet 207, compensating plate 208 and birefringece crystal 210 between optical fiber collimator 201 and optical fiber collimator 211, compensating plate 208 belows also are provided with second half wave plate.
Different from the first embodiment, in the present embodiment, six roots of sensation optical fiber is installed in optical fiber collimator 201, three optical fiber are installed in optical fiber collimator 211, so the light path control device is realized the function of three optical circulators.Wherein, three ports that port one A, 2A, 3A are first optical circulator, three ports that port one B, 2B, 3B are second optical circulator, three ports that port one C, 2C, 3C are the 3rd optical circulator, port one A, 3A, 1B, 3B, 1C, 3C are positioned at the outer end of optical fiber collimator 201, six ports are arranged side by side, and port 2A, 2B, 2C are positioned at the outer end of optical fiber collimator 211, and three ports also are arranged side by side.
From port one A incide port 2A outgoing light beam, from port one B incide the light beam of port 2B outgoing, the light beam that incides port 2C outgoing from port one C intersects at the adjacent surface of Wollaston prism 205,206, but mutually will not interfere with each other, thereby guarantee the quality of beam Propagation.
The 3rd embodiment:
Referring to Figure 11, the structure of the structure of the present embodiment and the first embodiment is basically identical, it has optical fiber collimator 301 and optical fiber collimator 311, be provided with successively birefringece crystal 302, half-wave plate 303, Faraday rotation sheet 304, Wollaston prism 305,306, Faraday rotation sheet 307, compensating plate 308 and birefringece crystal 310 between optical fiber collimator 301 and optical fiber collimator 311, compensating plate 308 belows also are provided with second half wave plate.
Four optical fiber that are arranged side by side are installed in optical fiber collimator 301, two optical fiber that are arranged side by side are installed in optical fiber collimator 211, so the light path control device are realized the function of two optical circulators.Wherein, three ports that port one A, 2A, 3A are first optical circulator, three ports that port one B, 2B, 3B are second optical circulator.
Different from the first embodiment is, two optical fiber that are arranged in optical fiber collimator 311 are not adjacency, as shown in figure 12, be arranged between two optical fiber 322 in optical fiber collimator 311 and there is certain distance, and be arranged on four optical fiber 320 close arrangement in optical fiber collimator 301, i.e. two adjacent optical fiber 320 adjacency.
Owing between port 2A and port 2B, thering is certain distance, therefore two port one A, 3A of the first optical circulator are not the interval layout with two port one B, 3B of the second optical circulator, two adjacent layouts of port one A, 3A of the first optical circulator, two port one B, 3B of the second optical circulator are also adjacent layouts.
In the same manner, from port one A incide the light beam of port 2A outgoing, the light beam that incides port 2B outgoing from port one B intersects at the adjacent surface of Wollaston prism 305,306, but mutually will not interfere with each other, thereby guarantee the quality of beam Propagation.
In the present embodiment, the axis of the axis of optical fiber 320 and optical fiber collimator 301 is not to be arranged in parallel, but certain angle is arranged, can be from port 2A outgoing from the light beam of port one A incident thereby guarantee, and can be from port 3A outgoing from the light beam of port 2A incident.
The 4th embodiment:
Referring to Figure 13, the present embodiment has optical fiber collimator 401 and optical fiber collimator 411, be provided with successively birefringece crystal 402, half-wave plate 403, Faraday rotation sheet 404, Wollaston prism 405,406, Faraday rotation sheet 407, compensating plate 408 and birefringece crystal 410 between optical fiber collimator 401 and optical fiber collimator 411, compensating plate 408 belows also are provided with second half wave plate.
Referring to Figure 14, interior 420,422, three optical fiber 420 of three optical fiber that are equipped with respectively of optical fiber collimator 401,411 are arranged side by side in optical fiber collimator 401, and two adjacent optical fiber 420 adjacency.Three optical fiber 422 also are arranged side by side in optical fiber collimator 411, and two adjacent optical fiber 422 adjacency.
Form respectively three ports optical fiber collimator 401,411 is outer, respectively to be positioned at optical fiber collimator 401 outer port one A, 2B, 3A and to be positioned at optical fiber collimator 411 outer port one B, 2A, 3B, three ports that wherein port one A, 2A, 3A are first optical circulator, three ports that port one B, 2B, 3B are second optical circulator, so the present embodiment can be realized the function of two optical circulators.
From Figure 14, outside optical fiber collimator 401, the port 2B of second optical circulator is between the two ends of first optical circulator port one A, 3A, and outside optical fiber collimator 411, the port 2A of first optical circulator is between the two ends of second optical circulator port one B, 3B.This symmetrical structure is realized the integrated of optical circulator, reduces the volume of optical circulator array, reduces the production cost of optical circulator.
Certainly, above-described embodiment is only the preferred embodiment of the invention, during practical application, also more change can be arranged, for example second, third, in the 4th embodiment, be equipped with the magnetic field of permanent magnet for generation of fixed-direction outside the Faraday rotation sheet.The magnetic field that the direction in the magnetic field produced as the magnetic field producer part is direction-changeable, the light path control device of three embodiment is the magneto-optic shutter array.
In addition, the present invention can also be applied on the optical circulator array of four ports, four optical fiber for example are installed in each optical fiber collimator in the first embodiment, fill two optical fiber that are arranged side by side more than on optical fiber collimator 111, a side at port 2A increases by two ports, can realize the optical circulator of two four ports.
In addition, can use polarization beam splitter prism (PBS) to substitute birefringece crystal as light splitting splicer part, such change also can realize purpose of the present invention.
When the light path control device is used as the optical circulator array, two Faraday rotation sheets of optically-active assembly can be the magneto-optical crystals that carries the magnetic domain locking, and like this, the Faraday rotation sheet does not need the magnetic field producer part of additional fixed-direction outward.
In the refractive element of above-described embodiment, two prisms can be the prisms be made by the optical birefringence material, can be also that one of them prism is made by birefringent material, and another prism is made by isotropic optical lens luminescent material.
The change of refractive element, the variations such as change of the concrete device of optically-active assembly finally it is emphasized that and the invention is not restricted to above-mentioned embodiment, as also should be included in the protection domain of the claims in the present invention.
Claims (10)
1. the light path control device, comprise
The first optical fiber collimator and the second optical fiber collimator, be disposed with the first light splitting splicer part, the first half-wave plate assembly, optically-active assembly, the second half-wave plate assembly and the second light splitting splicer part between described the first optical fiber collimator and described the second optical fiber collimator;
It is characterized in that:
The outer end of the outer end of described the first optical fiber collimator and described the second optical fiber collimator is respectively equipped with a plurality of ports that are arranged side by side, a plurality of described ports form the port of the light path devices more than two, the quantity of the described port of each described light path devices is more than three, and each described light path devices comprises at least one the described port that is positioned at described the first optical fiber collimator outer end and is positioned at least one described port of described the second optical fiber collimator outer end.
2. light path control device according to claim 1 is characterized in that:
Two Faraday rotation sheets that described optically-active assembly has refractive element and is positioned at described refractive element both sides.
3. light path control device according to claim 1 is characterized in that:
Described optically-active assembly has spaced apart two refractive element and two Faraday rotation sheets.
4. according to the described light path control device of claim 2 or 3, it is characterized in that:
Described optically-active assembly also has the magnetic field producer part that applies fixed-direction magnetic field to described Faraday rotation sheet.
5. according to the described light path control device of claim 2 or 3, it is characterized in that:
Described optically-active assembly also has the magnetic field producer part that applies direction-changeable magnetic field to described Faraday rotation sheet.
6. according to the described light path control device of claims 1 to 3 any one, it is characterized in that:
The quantity of the described port of each described light path devices is three, and two described ports of each described light path devices are positioned at the outer end of described the first optical fiber collimator, the described port of another of each described light path devices is positioned at the outer end of described the second optical fiber collimator.
7. light path control device according to claim 6 is characterized in that:
The described port interval that is positioned at a plurality of described light path devices of described the first optical fiber collimator outer end is arranged.
8. light path control device according to claim 6 is characterized in that:
Be positioned at two adjacent layouts of described port of the same described light path devices of described the first optical fiber collimator outer end.
9. according to the described light path control device of claims 1 to 3 any one, it is characterized in that:
The quantity of the described port of each described light path devices is three, and two described ports of the first light path devices are positioned at the outer end of described the first optical fiber collimator, and the described port of another of described the first light path devices is positioned at the outer end of described the second optical fiber collimator;
Two described ports of the second light path devices are positioned at the outer end of described the second optical fiber collimator, and the described port of another of described the second light path devices is positioned at the outer end of described the first optical fiber collimator.
10. according to the described light path control device of claim 2 or 3, it is characterized in that:
Described refractive element is Wollaston prism or Rochon prism or a pair of birefringent wedge crystal adjoined each other.
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| CN201310393531.7A CN103424896B (en) | 2013-09-02 | 2013-09-02 | Optical path control device |
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| CN201310393531.7A CN103424896B (en) | 2013-09-02 | 2013-09-02 | Optical path control device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108132500A (en) * | 2018-01-30 | 2018-06-08 | 福建天蕊光电有限公司 | A kind of closed loop optical circulator |
| CN108169857A (en) * | 2017-12-27 | 2018-06-15 | 中国科学院半导体研究所 | A kind of bidirectional optical amplifier transmitted applied to extra long distance split-second precision |
| CN109613724A (en) * | 2019-01-30 | 2019-04-12 | 福建华科光电有限公司 | A kind of magneto-optic adjustable optical attenuator |
| CN111751929A (en) * | 2019-03-29 | 2020-10-09 | 福州高意通讯有限公司 | Free space circulator |
| WO2021023050A1 (en) * | 2019-08-07 | 2021-02-11 | 浙江大学 | Micro magneto-optical fiber-optic switch |
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| US20020097957A1 (en) * | 2001-01-22 | 2002-07-25 | Juro Kikuchi | Arrayed optical device |
| US6580842B1 (en) * | 2002-02-11 | 2003-06-17 | Markus P. Hehlen | Integrated optical circulator array |
| CN2896323Y (en) * | 2006-03-28 | 2007-05-02 | 武汉光迅科技股份有限公司 | Compacted 1X2 magnetic-optical switch |
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| US20020097957A1 (en) * | 2001-01-22 | 2002-07-25 | Juro Kikuchi | Arrayed optical device |
| CN2487161Y (en) * | 2001-07-19 | 2002-04-17 | 昂纳信息技术（深圳）有限公司 | Optical circulator |
| US6580842B1 (en) * | 2002-02-11 | 2003-06-17 | Markus P. Hehlen | Integrated optical circulator array |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108169857A (en) * | 2017-12-27 | 2018-06-15 | 中国科学院半导体研究所 | A kind of bidirectional optical amplifier transmitted applied to extra long distance split-second precision |
| CN108132500A (en) * | 2018-01-30 | 2018-06-08 | 福建天蕊光电有限公司 | A kind of closed loop optical circulator |
| CN108132500B (en) * | 2018-01-30 | 2020-02-07 | 福建天蕊光电有限公司 | Closed loop optical circulator |
| CN109613724A (en) * | 2019-01-30 | 2019-04-12 | 福建华科光电有限公司 | A kind of magneto-optic adjustable optical attenuator |
| CN109613724B (en) * | 2019-01-30 | 2024-02-13 | 福建华科光电有限公司 | Magneto-optical adjustable optical attenuator |
| CN111751929A (en) * | 2019-03-29 | 2020-10-09 | 福州高意通讯有限公司 | Free space circulator |
| WO2021023050A1 (en) * | 2019-08-07 | 2021-02-11 | 浙江大学 | Micro magneto-optical fiber-optic switch |
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|---|---|
| CN103424896B (en) | 2016-09-28 |
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