WO2020259239A1 - Circulateur optique à trois ports miniaturisé avec interface optique standard - Google Patents

Circulateur optique à trois ports miniaturisé avec interface optique standard Download PDF

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Publication number
WO2020259239A1
WO2020259239A1 PCT/CN2020/094171 CN2020094171W WO2020259239A1 WO 2020259239 A1 WO2020259239 A1 WO 2020259239A1 CN 2020094171 W CN2020094171 W CN 2020094171W WO 2020259239 A1 WO2020259239 A1 WO 2020259239A1
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WO
WIPO (PCT)
Prior art keywords
interface
splitting mechanism
polarization splitting
degree
miniaturized
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PCT/CN2020/094171
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English (en)
Chinese (zh)
Inventor
贾旭
于光龙
陈海峰
郑熙
任策
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福州高意光学有限公司
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Publication of WO2020259239A1 publication Critical patent/WO2020259239A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/27—Optical coupling means with polarisation selective and adjusting means
    • G02B6/2746—Optical coupling means with polarisation selective and adjusting means comprising non-reciprocal devices, e.g. isolators, FRM, circulators, quasi-isolators
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/27—Optical coupling means with polarisation selective and adjusting means
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/27—Optical coupling means with polarisation selective and adjusting means
    • G02B6/2706—Optical coupling means with polarisation selective and adjusting means as bulk elements, i.e. free space arrangements external to a light guide, e.g. polarising beam splitters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/27—Optical coupling means with polarisation selective and adjusting means
    • G02B6/2753—Optical coupling means with polarisation selective and adjusting means characterised by their function or use, i.e. of the complete device
    • G02B6/2773—Polarisation splitting or combining

Definitions

  • the invention relates to the field of optical communication technology, in particular to a miniaturized three-port optical ring device with a standard optical interface.
  • Optical circulator is a non-reciprocal optical passive device with multi-port input and output. Its function is to enable optical signals to be transmitted sequentially along the specified ports. When the transmission sequence of optical signals is changed, its loss is very large. Therefore, signal isolation can be achieved.
  • a typical structure has N (N is greater than or equal to 3) ports. As shown in Figure 1 of the specification, when light is input from port 1, light is output from port 2. When light is input from port 2, light is output from port 3. And so on.
  • the nonreciprocal characteristic of the optical circulator is realized by the Faraday effect of magneto-optical materials.
  • the Faraday effect refers to the phenomenon that the polarization plane of the electromagnetic wave (light wave) in the dielectric material rotates under the action of a magnetic field parallel to the light propagation direction, and its rotation direction is independent of the light propagation direction, that is, polarization is independent.
  • the light wave becomes polarized light after passing through the first polarizing element.
  • the polarization direction is rotated 45°, parallel to the light passing direction of the second polarizing element, and allowed to pass; when the light is transmitted in the opposite direction, it passes through the Faraday After the optical rotator, the polarization direction of the light is perpendicular to the light passing direction of the first polarizer and cannot pass.
  • optical circulator Due to the nonreciprocal and sequential transmission characteristics of the optical circulator, it can be used to separate the forward and reverse transmission optical signals in the same optical fiber. It is widely used in optical fiber communications, optical fiber sensing and optical fiber testing systems. Simplify the system structure and improve performance.
  • the main related specific applications include: single-wave and single-fiber two-way communication, fiber Bragg grating (FBG) combined application, erbium-doped fiber amplifier (EDFA), wavelength division multiplexing (WDM), dispersion compensation, optical signal upload/download, also available Used as a coupler in optical time domain reflectometer (OTDR) and fiber optic gyroscope.
  • the structure of the optical circulator in the prior art is usually a structure of fiber input and fiber output, as shown in FIG. 2.
  • the principle of this structure is based on a series of discrete optical components including birefringent crystal beam splitter thick film, birefringent crystal wedge plate, Faraday rotator, wave plate, optical compensation film, single fiber collimator and dual fiber collimator
  • the devices are assembled together and finally encapsulated in a cylindrical metal casing.
  • the optical circulator of the current technology on the one hand, has a complex structure, high assembly cost, and high material cost, which leads to a high market price of the circulator; on the other hand, the size of this structure is long, and all three ports are optical fibers , It is not suitable for directly docking with standard optical fiber connectors. If you want to achieve docking, you must use fiber fusion splicing to splice the required optical interface. Splicing requires a certain length of optical fiber, which will inevitably make the device unable to be small ⁇ .
  • the purpose of the present invention is to provide a miniaturized, low-cost, plug-and-play miniaturized three-port optical ring device with a standard optical interface;
  • the function of the optical circulator is realized by a miniature integrated free space circulator, and the main performance indicators such as isolation, differential loss and return loss of the present invention fully meet the industry standards.
  • a miniaturized three-port optical ring device with a standard optical interface which includes:
  • the circulator core includes a first polarization splitting mechanism, a 45-degree Faraday rotating plate, a 22.5-degree half-wave plate, and a second polarization splitting mechanism arranged in sequence.
  • the end surface of the first polarization splitting mechanism away from the second polarization splitting mechanism forms a common
  • the end surface of the second polarization splitting mechanism away from the first polarization splitting mechanism forms a transmitting end
  • the end surface of the second polarization splitting mechanism adjacent to the 22.5 degree half-wave plate forms a receiving end;
  • the metal shell has a accommodating cavity and encapsulates the annular core.
  • the outer surface of the metal shell is provided with a common end interface and a transmitting terminal which are connected to the accommodating cavity and are respectively opposite to the common end of the annular core, the transmitting end and the receiving end. End interface and receiving end interface.
  • the said common end interface, the receiving end interface and the transmitting end interface are all provided with a coupling lens directly opposite to the common end, the transmitting end or the receiving end of the circulator core.
  • the public end interface, the receiving end interface and the transmitting end interface are LC standard interface, SC standard interface, FC standard interface or ST standard interface, which are usually assembled from metal parts, ceramic ferrules and ceramic sleeves.
  • the standard interface can realize the interconnection with the corresponding connector.
  • the common terminal interface, the receiving terminal interface and the transmitting terminal interface are glued or welded and fixed on the metal shell, wherein the welding at least includes laser welding or tin welding.
  • the metal shell is made of stainless steel material or alloy material.
  • first polarization splitting mechanism, the 45-degree Faraday rotating plate, the 22.5-degree half-wave plate, and the second polarization splitting mechanism are sequentially glued or optically glued into an integrated structure, and there is a light path between the optical components and components.
  • the glued surface or the deepened photoresist surface is coated with an antireflection film or no coating, but the interface refractive index matches that of the glue, or a photoresist dielectric film is plated.
  • the first polarization splitting mechanism includes a first 45° rhombic prism and a first 45° right-angle prism, and the inclined surface of the first 45° right-angle prism is opposite to the upper or lower end surface of the first 45° rhombic prism.
  • the right-angle surface of the first 45° right-angle prism is attached to the end surface of the 45-degree Faraday rotator that is away from the 22.5-degree half-wave plate, wherein the first 45° rhombic prism is plated away from the end surface of the first 45-degree right-angle prism
  • There is a high-reflection film or no film and the end surface attached to the inclined surface of the first 45° right-angle prism is plated with a polarization splitting film and fixed as a whole.
  • the second polarization beam splitting mechanism includes a second 45° rhombic prism and a second 45° right-angle prism.
  • the inclined surface of the second 45° right-angle prism is opposite to the upper or lower end surface of the second 45° rhombic prism.
  • the right-angle surface of the second 45° right-angle prism is attached to the end surface of the 22.5-degree half-wave plate away from the 45-degree Faraday rotator, and the end surface of the second 45-degree rhombic prism away from the second 45-degree right-angle prism is plated with high Reflective film or no film, the end surface attached to the inclined surface of the second 45° right-angle prism is coated with a polarization splitting film and fixed as a whole, wherein the other right-angle surface of the second 45° right-angle prism is set as the receiving end, The end surface of the two 45° rhombic prisms away from the 22.5-degree half-wave plate is set as the transmitting end.
  • the 45° Faraday rotator is a self-contained magnetic Faraday rotator or an external magnetic Faraday rotator.
  • a magnetic field generating device is provided on its outer peripheral side.
  • the half-wave plate has a single half-wave plate or a combined half-wave plate structure.
  • a miniaturized three-port optical ring device with a standard optical interface which is characterized in that it includes:
  • the circulator core includes a first polarization splitting mechanism, a 45-degree Faraday rotating plate, a 22.5-degree half-wave plate, and a second polarization splitting mechanism arranged in sequence.
  • the end surface of the first polarization splitting mechanism away from the second polarization splitting mechanism forms a common
  • the end surface of the second polarization splitting mechanism away from the first polarization splitting mechanism forms a transmitting end
  • the end surface of the second polarization splitting mechanism adjacent to the 22.5 degree half-wave plate forms a receiving end;
  • the 45-degree reflector is arranged on the receiving end side of the circulator core and deflects the optical signal emitted from the receiving end by 45 degrees to make it parallel to the optical signal input from the transmitting end;
  • the metal shell has a containing cavity and encapsulates the circulator core and the 45-degree reflector.
  • the outer surface of the metal shell is provided with a common end interface, a receiving end interface and a transmitting end interface connected to the containing cavity.
  • the end interface and the transmitting end interface are respectively opposite to the common end and the transmitting end of the circulator core, and the receiving end interface is opposite to the 45-degree reflector and is used to receive the optical signal emitted from the receiving end of the circulator core and deflected by the 45-degree reflector.
  • the transmitting end and the receiving end have a fiber collimator structure with pigtails.
  • the present invention has the following beneficial effects compared with the prior art: the present invention has the advantages of miniaturization, low cost, standard optical interface, plug and play; more importantly, The main performance indicators such as isolation, differential loss, sensitivity, etc. of the present invention fully meet industry standards, and especially can meet the performance indicator requirements of high-speed optical signal ( ⁇ 25Gps) transmission for optical circulators.
  • Figure 1 is a schematic diagram of an optical circulator, which includes a three-port circulator and a four-port circulator;
  • Figure 2 is a schematic diagram of the prior art optical circulator after packaging
  • FIG. 3 is a perspective schematic view of Embodiment 1 of the present invention.
  • Embodiment 4 is a schematic side view of the structure of Embodiment 1 of the present invention.
  • Fig. 5 is a schematic sectional view of the structure of the first embodiment of the present invention.
  • Fig. 6 is a schematic structural diagram of the circulator core of embodiment 1 of the present invention.
  • FIG. 7 is a schematic diagram of the optical path of the circulator core in Embodiment 1 of the present invention, showing the optical path from the common end to the receiving end;
  • Fig. 8 is a schematic diagram of the optical path of the circulator core in embodiment 1 of the present invention, showing the optical path from the transmitting end to the common end;
  • Figure 9 is a three-dimensional schematic diagram of Embodiment 2 of the present invention.
  • Embodiment 2 of the present invention is a schematic side view of the structure of Embodiment 2 of the present invention.
  • FIG. 11 is a schematic view of the cut-away structure of Embodiment 2 of the present invention.
  • Figure 12 is a three-dimensional schematic diagram of Embodiment 3 of the present invention.
  • Embodiment 3 of the present invention is a schematic side view of the structure of Embodiment 3 of the present invention.
  • Fig. 14 is a schematic cross-sectional structure diagram of Embodiment 3 of the present invention.
  • a miniaturized three-port optical ring device with a standard optical interface includes:
  • the circulator core 2 includes a first polarization splitting mechanism 21, a 45-degree Faraday rotator 22, a 22.5-degree half-wave plate 23, and a second polarization splitting mechanism 24 arranged in sequence.
  • the first polarization splitting mechanism 21 is far from the second polarization
  • the end face of the light splitting mechanism 24 forms a common end
  • the end face of the second polarization light splitting mechanism 24 away from the first polarization light splitting mechanism 21 forms a transmitting end
  • the end face of the second polarization light splitting mechanism 24 adjacent to the 22.5 degree half-wave plate 23 forms a receiving end;
  • the metal shell 1 has a accommodating cavity and encapsulates the circulator core 2 therein.
  • the outer surface of the metal shell 1 is provided with a common terminal connected to the accommodating cavity and opposite to the common end, the transmitting end and the receiving end of the circulator core 2 respectively.
  • the end interface 3, the transmitting end interface 5 and the receiving end interface 4, the three interfaces are perpendicular to each other in the same plane.
  • the common end interface 3, the receiving end interface 4, and the transmitting end interface 5 are all provided with a coupling lens 6 directly opposite to the common end, the transmitting end or the receiving end of the circulator core 2.
  • the public end interface 3, the receiving end interface 4, and the transmitting end interface 5 are LC standard interfaces, SC standard interfaces, FC standard interfaces or ST standard interfaces, which are usually assembled from metal parts, ceramic ferrules and ceramic sleeves. As a result, these standard interfaces can be interconnected with corresponding connectors.
  • the common end interface 3, the receiving end interface 4, and the transmitting end interface 5 are glued or welded and fixed on the metal shell 1, wherein the welding includes at least laser welding or tin welding.
  • the metal shell 1 is made of stainless steel material or alloy material.
  • the first polarization splitting mechanism 21, the 45-degree Faraday rotator 22, the 22.5-degree half-wave plate 23, and the second polarization splitting mechanism 24 are sequentially glued or photo-glue integrated.
  • the glued surface or the deepened photoresist surface through which the light path passes between the optical components and elements are all coated with an antireflection film or no coating but the interface refractive index matches the refractive index of the glue or is coated with a photoglue medium film.
  • the first polarization beam splitting mechanism 21 includes a first 45° rhomboid prism 211 and a first 45° right-angle prism 212, the first 45° right-angle prism 212
  • the inclined surface is attached to the upper or lower end surface of the first 45° rhombic prism 211 (the structure of this embodiment is attached to the upper end surface), and the right angle surface of the first 45° right-angle prism 212 is far away from the 45-degree Faraday rotator 22
  • the end faces of the 22.5-degree half-wave plate 23 are attached to each other, wherein the end face of the first 45° rhombic prism 211 away from the first 45° right-angle prism 212 (the lower end face in this embodiment) is plated with a high-reflection film or no film.
  • the end surface attached to the inclined surface of the first 45° right-angle prism 212 is plated with a polarization splitting film and fixed as a whole, which can realize
  • the second polarization splitting mechanism 24 includes a second 45° rhomboid prism 241 and a second 45° right-angle prism 242.
  • the second 45° right-angle prism 242 The oblique surface is attached to the upper or lower end surface of the second 45° rhombic prism 241 (the structure of this embodiment is attached to the lower end surface), and the right angle surface of the second 45° right angle prism 242 is far away from the 22.5 degree half-wave plate 23
  • the end surface of the 45-degree Faraday rotator 22 is attached, and the end surface of the second 45-degree rhombic prism 241 away from the second 45-degree right-angle prism 242 is coated with a high-reflective film or no coating, which is the inclined surface of the second 45-degree right-angle prism 242
  • the bonded end surface is plated with a polarization splitting film and fixed as a whole, which can realize the functions of polarization splitting and light combining
  • the other right angle surface of the second 45° right angle prism 242 is set as the receiving end, and the second 45° rhombic prism The end surface of 241 far away from the 22.5 degree half-wave plate 23 is set as the transmitting end.
  • the 45° Faraday rotator 22 can be a self-contained magnetic Faraday rotator or an external magnetic Faraday rotator.
  • a magnetic field generating device is provided on the outer circumference.
  • the half-wave plate 23 has a single half-wave plate or a combined half-wave plate structure; the optical axis of the half-wave plate 23 and the polarization splitting component form an angle of 22.5°.
  • all glued surfaces or deepened photoresist surfaces through which the light path passes are coated with anti-reflection coating or no coating but the interface refractive index matches the refractive index of the glue or is coated with a photoresist dielectric film.
  • all three ports are plated with antireflection coating.
  • the circulator core 2 is fixed in the metal shell 1, and its three ports respectively correspond to the transmitting end, the receiving end and the common end on the three interfaces of the shell.
  • FIG. 7 is a schematic diagram of the optical path of the circulator core in Example 1 of the present invention, showing the optical path propagation from the common end to the receiving end; in the optical path, from left to right, the input optical signal enters from the common end and passes through the standard After the LC interface (that is, the common end interface 3) and the coupling lens 6, the input signal light becomes a collimated beam, which is separated into S light and P light after passing through the first polarization splitting mechanism 21 of the circulator core 2, where:
  • the light After passing through the polarization splitting film of the first polarization splitting mechanism 21, the light is reflected downward and turned 90°, and then enters the first 45° rhombic prism 211 through the first The 45° reflecting surface at the lower end of the 45° rhombic prism 211, where the reflection is total internal reflection (you can also choose to coat this surface with a high reflective film), and the reflected light enters the 45° Faraday rotator 22 to the right, along the light propagation Observed from the direction, after passing through the 45° Faraday rotator 22, the polarization state of the light rotates 45° counterclockwise, and then enters the 22.5° half-wave plate 23.
  • the optical axis of the 22.5° half-wave plate 23 is 22.5° counterclockwise with the S light
  • the polarization state of the light returns to the S light perpendicular to the surface of the paper, and then enters the second 45° rhombic prism 241, passing through the upper end of the second 45° rhombic prism 241 45° reflective surface, where the reflection is total internal reflection (you can also choose to coat this surface with high reflective film), turn 90° and transmit downward, and then enter the coupling lens 2 at the receiving end, and the collimated light is focused by the coupling lens 2 Then, it is efficiently coupled to the optical fiber ferrule of the standard optical interface of the receiving end (ie, receiving end interface 4).
  • the light After passing through the polarization splitting film of the first polarization splitting mechanism 21, the light is completely transmitted, and then enters the 45° Faraday rotator 22, along the direction of light propagation.
  • the polarization direction of the light is turned 45° counterclockwise, and then enters the 22.5° half-wave plate 23.
  • the optical axis of the 22.5° half-wave plate 23 is 22.5° counterclockwise with the S-polarized light.
  • the polarization direction It becomes P light again, and then it is incident on the upper inclined surface of the second 45° rhombic prism 241, passing through the 45° reflecting surface of the second 45° rhombic prism 241, where the reflection is total internal reflection (you can also choose here
  • the surface is plated with a high-reflection film), the reflected light enters the polarization splitting film of the second polarization splitting mechanism 24 downwards, the light is completely transmitted, and finally combined with the aforementioned S light, and then enters the coupling lens 6 of the receiving end interface 4
  • the collimated light is focused by the coupling lens 6, it is efficiently coupled to the optical fiber ferrule of the standard optical interface of the receiving end (that is, the receiving end interface 4).
  • FIG 8 is a schematic diagram of the optical path of the circulator core in Example 1 of the present invention, showing the optical path propagation from the transmitter end to the common end; in the optical path, from right to left, the input optical signal enters from the transmitter end and passes through the standard After the LC interface (i.e. the transmitter interface 5) and the coupling lens 6, the input signal light becomes a collimated beam, which is separated into S light and P light after passing through the second polarization splitting mechanism 24, where:
  • the light After passing through the second polarization splitting mechanism 24, the light is reflected upwards and turned 90°, and then enters the second 45° rhombic prism 241, and passes through the second 45° °The 45°reflecting surface of the upper end of the rhombic prism 241, where the reflection is total internal reflection (you can also choose to coat this surface with a high reflective film), and the reflected light enters the 22.5° half-wave plate 23 toward the left, along the direction of light propagation , The optical axis of the 22.5° half-wave plate 23 and the S light form a clockwise 22.5° angle.
  • the polarization direction of the light After passing through the 22.5° half-wave plate 23, the polarization direction of the light forms a clockwise 45° angle with the S light, and then enters 45°
  • the Faraday rotator 22 after passing through the 45° rotator 22, the polarization state of the light is rotated clockwise by 45° at this time, and then becomes P light whose polarization direction is parallel to the paper surface, and then enters the first polarization splitting mechanism 21
  • the polarized light splitting film is completely transparent, and then enters the coupling lens 6 of the common end interface 3. After the collimated light is focused by the coupling lens 6, it is efficiently coupled to the standard optical interface of the common end (that is, the common end In the optical fiber ferrule of interface 3).
  • the light After passing through the second polarization splitting mechanism 24, the light is completely transmitted, and then enters the 22.5° half-wave plate 23, along the direction of light propagation, 22.5°
  • the optical axis of the half-wave plate 23 forms an angle of 22.5° clockwise with the S light.
  • the polarization direction of the light After passing through the 22.5° half-wave plate 23, the polarization direction of the light forms an angle of 45° counterclockwise with the P light, and then enters the 45° Faraday rotator. 22.
  • the polarization state of the light rotates 45° clockwise, and then becomes S light whose polarization direction is perpendicular to the paper surface, and then enters the lower end 45 of the first 45° rhombic prism 211 °Reflecting surface, where the reflection is total internal reflection (you can also choose to coat this surface with a high-reflection film), the reflected light is incident on the polarization splitting film of the first polarization splitting mechanism 21, and the S light is by the first polarization splitting mechanism
  • the 45° surface of the polarization splitting film of 21 is all reflected and turned 90° to the left, and finally combined with the aforementioned S light, and then enters the coupling lens 6 of the common end interface 3, and the collimated light is focused by the coupling lens 6 Then, it is efficiently coupled to the optical fiber ferrule of the standard optical interface of the common end (ie, common end interface 3).
  • This embodiment is roughly the same as the first embodiment. The difference is that it also includes a 45-degree reflector 7, which is arranged on the receiving end side of the circulator core 2 and deflects the optical signal emitted by the receiving end by 45 degrees to make it and The optical signal input from the transmitting end is parallel;
  • the common end interface 3 and the transmitting end interface 5 of the metal shell 1 are respectively opposite to the common end and the transmitting end of the circulator core 2, and the receiving end interface 4 is opposite to the 45-degree reflector 7 and is used to receive the receiving end of the circulator core 2.
  • the light signal emitted and deflected by a 45-degree mirror.
  • Embodiment 2 Except for the above differences, the other structures and principles of Embodiment 2 are the same as those of Embodiment 1, and will not be repeated here.
  • This embodiment is roughly the same as Embodiment 2, and the difference is that the transmitting end and the receiving end are optical fiber collimators with pigtails.
  • the structure of the fiber collimator with pigtail is usually composed of fiber head, coupling lens and metal sleeve. Laser welding process or soldering process or glue bonding process can be used to firmly connect the transmitting end port 4 and the receiving end port. Fixed on the shell; the common end has the same structure as the second embodiment.
  • the end of the ceramic ferrule of the standard optical interface corresponding to the coupling lens is usually processed to have a wedge angle of 4° to 10°, which will greatly improve the return loss index of the entire device.
  • the transmitting end since the transmitting end passes through the polarization splitting film, no matter transmitted light or reflected light, it will not reach the receiving end, so it will not affect the receiving end.
  • the signal at the end can achieve high isolation and sensitivity.
  • the polarization splitting film of the first polarization splitting mechanism 21 and the polarization splitting film of the second polarization splitting mechanism 24 can be manufactured in the same batch in the same batch, they can be made into long size and very high angular accuracy.
  • the 45° Faraday rotator 22 and the 22.5° half-wave plate 23 can also be processed into strips with the best length. The strips can be aligned without complicated adjustment and alignment, and then used Gluing or deepening the photoresist or photoresist process assembly and integration, and finally cutting the strip into multiple finished products, which can greatly reduce the cost of processing and assembly.
  • the circulator core used in the present invention can be very small due to the integrated free space optical circulator, which helps to greatly reduce the material cost of the circulator.
  • the brief assembly steps of the present invention are:
  • the transmitter interface, the receiver interface, and the common interface or fiber collimator components are adjusted with the coupling lens to form a collimator structure according to the design requirements;
  • the present invention can also use the free space circulator mentioned in other aforementioned patents to realize the function of the circulator, but it can be realized by making corresponding changes in the position of the optical interface or the collimator. The specific details will not be repeated here. .

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Abstract

L'invention concerne un circulateur optique à trois ports miniaturisé avec une interface optique standard, le circulateur optique à trois ports miniaturisé comprenant : un noyau de circulateur (2) qui comporte un premier mécanisme de division de faisceau polarisant (21), un rotateur de Faraday à 45 degrés (22), une plaque demi-onde à 22,5 degrés (23) et un second mécanisme de division de faisceau polarisant (24), ces derniers étant disposés en séquence, avec une face d'extrémité du premier mécanisme de division de faisceau polarisant (21), éloignée du second mécanisme de division de faisceau polarisant (24), formant une extrémité commune, une face d'extrémité du second mécanisme de division de faisceau polarisant (24), éloignée du premier mécanisme de division de faisceau de polarisation (21), formant une extrémité de transmission et une face d'extrémité du second mécanisme de division de faisceau polarisant (24), adjacente à la plaque demi-onde à 22,5 degrés (23), formant une extrémité de réception; et une enveloppe métallique (1) encapsulant le noyau circulateur (2), une surface externe de l'enveloppe métallique (1) étant pourvue d'une interface d'extrémité commune (3), d'une interface d'extrémité de transmission (5) et d'une interface d'extrémité de réception (4), chacune étant en communication avec une cavité de réception et étant respectivement directement opposées à l'extrémité commune, à l'extrémité de transmission et à l'extrémité de réception du noyau de circulateur (2). Le circulateur présente les avantages d'être miniaturisé et de faible coût, d'avoir des interfaces optiques standard et, à l'aide d'un branchement rapide, a des indices de performance principaux tels que l'isolation, la perte différentielle et la perte de retour satisfaisant complètement les normes industrielles et a de larges perspectives commerciales sur le marché.
PCT/CN2020/094171 2019-06-28 2020-06-03 Circulateur optique à trois ports miniaturisé avec interface optique standard WO2020259239A1 (fr)

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CN201910574398.2 2019-06-28
CN201910574398.2A CN112147741A (zh) 2019-06-28 2019-06-28 一种带有标准光接口的小型化三端口光环形器件

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Citations (7)

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