CN113589441B - Dual-mode switchable splitter - Google Patents
Dual-mode switchable splitter Download PDFInfo
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- CN113589441B CN113589441B CN202111125824.8A CN202111125824A CN113589441B CN 113589441 B CN113589441 B CN 113589441B CN 202111125824 A CN202111125824 A CN 202111125824A CN 113589441 B CN113589441 B CN 113589441B
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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
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/2938—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
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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
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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
- G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
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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
- G02B6/35—Optical coupling means having switching means
- G02B6/354—Switching arrangements, i.e. number of input/output ports and interconnection types
Abstract
The application discloses a dual-mode switchable optical splitter, which relates to the technical field of optical splitters, and is characterized in that an optical signal is divided into two beams of optical signals through a wavelength division multiplexer, wherein one beam of optical signal is emitted into a terminal device, the other beam of optical signal enters a first relay port or a second relay port through the light-on switching of an optical path switch, meanwhile, the first relay port and the second relay port are respectively connected with an optical isolation optical path and an optical coupling optical path of the optical isolator, and when the optical path switch is switched to the first relay port to conduct light, the optical isolation of the optical signal entering the first relay port is realized, so that single optical path transmission is realized; when the optical path switch is switched to the second relay port to transmit light, the light signal entering the second relay port is transmitted, and thus dual-optical path transmission is realized. The technical problems that the size of the optical splitter is large, the risk of mistaken plugging and unplugging is large, and the optical fiber loop is seriously attenuated due to long-term use are solved.
Description
Technical Field
The application relates to the technical field of optical splitters, in particular to a dual-mode switchable optical splitter.
Background
In recent years, with the rapid development of smart grids, power grid companies have begun to widely popularize smart substation construction. Because the intelligent substation has the characteristic of highly integrated circuit, each protection device can acquire all required data only by using two optical fibers. Therefore, for an intelligent substation, especially an intelligent substation with SV and GOOSE co-networks, the amount of data required to be interacted by the optical circuit is huge, and data abnormality is very likely to occur in the operation and maintenance process.
Common abnormal data conditions in the intelligent substation comprise SV data frame loss, SV data step loss and the like. The abnormal data of the optical loop may cause protection locking, and if the power system fails, the relay protection device will be rejected, and even a secondary or even a primary event of power production safety may be caused.
The intelligent wave recorder is an important way for inquiring and analyzing data abnormal events, but at the present stage, the intelligent wave recorder can only position the abnormal condition of the output data of the process layer switch, and cannot monitor the data condition at the front side of the process layer switch, so that the source of the abnormal condition of the data cannot be judged.
Due to the fact that the number of optical fibers connected with the process level switch of the intelligent substation is large, great difficulty is caused for troubleshooting of field maintainers. In order to find out the specific position where the abnormal data condition of the intelligent substation occurs, a currently common scheme is to add a temporary optical splitter at an interval fiber port of a process-level switch and further position the fault of the process-level switch and a front-side device of the switch, so as to determine the specific position of the fault, but the scheme also has the following defects:
1) when installing interim beam splitter additional, need carry out the optic fibre plug, because optic fibre is numerous, have the risk of mistake plug. In addition, the temporary optical splitter is additionally arranged, so that an optical loop is changed, if the operation of a maintainer is improper in the additional installation process, if an optical fiber interface is not plugged tightly or the turning radius of an optical fiber is too small, the optical attenuation of the loop is increased, and a real fault point cannot be accurately found. The service life of the optical fiber can be shortened by inserting and pulling the optical fiber for many times, the more the inserting and pulling times are, the greater the functional damage to the optical fiber is, and the safety risk of the equipment is greatly increased.
2) The traditional optical splitter continuously splits light in the using process, so that the attenuation of an optical fiber loop is serious after long-term use, and then the phenomena of error codes and even no data can be received by data received by back-end equipment.
3) The conventional optical splitter is large in size, often occupies a position above an optical port cross surface 1/3 when being additionally installed on a switch, even covers partial spare optical fiber ports, and the switch is difficult to dissipate heat after being additionally installed, so that the conventional optical splitter is very unfavorable for operation and maintenance.
Disclosure of Invention
The application provides a dual-mode switchable optical splitter, which is used for solving the technical problems of large size, high risk of mistaken plugging and unplugging and serious attenuation loss of an optical fiber loop caused by long-term use of the optical splitter.
In view of the above, a first aspect of the present application provides a dual-mode switchable optical splitter, including: the optical isolator comprises an optical inlet port, a wavelength division multiplexer, an optical path change-over switch, a first relay port, a second relay port and an optical isolator;
the light inlet port is used for receiving an optical signal sent by a working light source and transmitting the optical signal to the wavelength division multiplexer;
the wavelength division multiplexer is used for dividing the optical signal into a first optical signal and a second optical signal, injecting the first optical signal into an external terminal device, and injecting the second optical signal into the optical path change-over switch;
the output end of the optical path changeover switch is respectively connected with the first relay port and the second relay port and is used for switching the light passing states of the first relay port and the second relay port, wherein the light passing states comprise light passing state and light non-passing state;
the optical isolator comprises an optical isolation light path and an optical coupling light path;
the first relay port is connected with the optical isolation optical path and is used for performing optical isolation on the second optical signal;
the second relay port is connected with the optical coupling optical path and is used for coupling the second optical signal to the output end of the optical isolator, so that the second optical signal is transmitted to another external terminal device through the output end of the optical isolator.
Optionally, the wavelength division multiplexer is provided with a dual optical fiber head, a G lens, a spectroscopic medium film, a C lens, and a first single optical fiber head in sequence along the optical axis.
Optionally, the ratio of the optical power of the first optical signal and the second optical signal is 3: 1.
Optionally, the optical isolator is sequentially provided with a second single optical fiber head, a first collimator, a first wedge-shaped birefringent crystal, a 45 ° faraday rotator, a second wedge-shaped birefringent crystal, a second collimator, and a third single optical fiber head along an optical axis; an included angle between a refraction surface of the first wedge-shaped birefringent crystal, which is far away from the Faraday rotator, and an optical axis is 45 degrees, an included angle between a refraction surface of the second wedge-shaped birefringent crystal, which is far away from the Faraday rotator, and the optical axis is 135 degrees, and a magnet is arranged on the outer side of the 45-degree Faraday rotator and used for providing a magnetic field;
the third single optical fiber head, the second collimator, the second wedge-shaped birefringent crystal, the 45-degree faraday rotator, the first wedge-shaped birefringent crystal, the first collimator and the second single optical fiber head are sequentially connected to form the optical isolation optical path, and the first relay port is connected with the third single optical fiber head;
the second single optical fiber head, the first collimator, the first wedge-shaped birefringent crystal, the 45-degree faraday rotator, the second wedge-shaped birefringent crystal, the second collimator and the third single optical fiber head are sequentially connected to form the optical coupling optical path, and the second relay port is connected with the second single optical fiber head.
Optionally, the wavelength division multiplexer is connected to the optical path changeover switch through an LC fiber connector.
Optionally, the optical splitter further includes a ceramic case, and the optical input port, the wavelength division multiplexer, the optical path switch, the first relay port, the second relay port, and the optical isolator are all packaged in the ceramic case.
According to the technical scheme, the invention has the following advantages:
the invention provides a dual-mode switchable optical splitter, which divides an optical signal into two optical signals through a wavelength division multiplexer, wherein one optical signal is emitted into a terminal device, the other optical signal enters a first relay port or a second relay port through the light-on switching of an optical path switch, meanwhile, the first relay port and the second relay port are respectively connected with an optical isolation optical path and an optical coupling optical path of the optical splitter, when the optical path switch is switched to the first relay port to be light-on, the optical isolation of the optical signal entering the first relay port is realized, and thus, single optical path transmission is realized, so that when the fault is monitored without the optical splitting function, the optical splitter does not split light, the optical signal carries out single optical path transmission according to the original path, and the optical power loss is also reduced; and switch to the second trunk port when the light path change over switch and lead to light, then realize leading to light to the light signal that gets into the second trunk port to realize double-optical path transmission, so that when needing to use the beam split function to carry out troubleshooting, transfer optical isolator to "double-optical path" transmission mode, the beam splitter divides the light path, realize that process layer switch and switch front side device data gather in real time, double-optical path parallel transmission promptly, carry out real time monitoring and degree of depth fault location to the network, thereby eliminate the trouble.
Meanwhile, the single optical path transmission and the double optical path transmission share the same optical isolator, so that the optical splitter is beneficial to compact size, the defect that a standby optical fiber port is covered when the optical splitter is additionally installed on a switch is effectively overcome, and the normal use and operation of each layer of switch are ensured; meanwhile, the plugging times are reduced, the risk of mistaken plugging is reduced, continuous light splitting is not needed through switching of light splitting and non-light splitting functions, and the phenomena that the optical fiber loop is seriously attenuated due to long-term use of the light splitter, and then error codes or even data cannot be received by data received by back-end equipment are caused are avoided.
Drawings
Fig. 1 is a schematic structural diagram of a dual-mode switchable optical splitter according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a wavelength division multiplexer according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an optical isolator according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Due to the fact that the number of optical fibers connected with the process level switch of the intelligent substation is large, great difficulty is caused for troubleshooting of field maintainers. In order to find out the specific position where the abnormal data condition of the intelligent substation occurs, a currently common scheme is to add a temporary optical splitter at an interval fiber port of a process-level switch and further position the fault of the process-level switch and a front-side device of the switch, so as to determine the specific position of the fault, but the scheme also has the following defects:
1) when installing interim beam splitter additional, need carry out the optic fibre plug, because optic fibre is numerous, have the risk of mistake plug. In addition, the temporary optical splitter is additionally arranged, so that an optical loop is changed, if the operation of a maintainer is improper in the additional installation process, if an optical fiber interface is not plugged tightly or the turning radius of an optical fiber is too small, the optical attenuation of the loop is increased, and a real fault point cannot be accurately found. The service life of the optical fiber can be shortened by inserting and pulling the optical fiber for many times, the more the inserting and pulling times are, the greater the functional damage to the optical fiber is, and the safety risk of the equipment is greatly increased.
2) The traditional optical splitter continuously splits light in the using process, so that the attenuation of an optical fiber loop is serious after long-term use, and then the phenomena of error codes and even no data can be received by data received by back-end equipment.
3) The conventional optical splitter is large in size, often occupies a position above an optical port cross surface 1/3 when being additionally installed on a switch, even covers partial spare optical fiber ports, and the switch is difficult to dissipate heat after being additionally installed, so that the conventional optical splitter is very unfavorable for operation and maintenance.
To this end, referring to fig. 1, the present invention provides a dual-mode switchable optical splitter, including: an optical input port 100, a wavelength division multiplexer 200, an optical path switch 300, a first relay port 400, a second relay port 500, and an optical isolator 600;
the optical input port 100 is configured to receive an optical signal emitted by the working light source, and transmit the optical signal to the wavelength division multiplexer 200;
the wavelength division multiplexer 200 is configured to divide an optical signal into a first optical signal and a second optical signal, inject the first optical signal into an external terminal device, and inject the second optical signal into the optical path switch 300;
the output end of the optical path switch 300 is connected to the first relay port 400 and the second relay port 500, respectively, and is configured to switch the light passing states of the first relay port 400 and the second relay port 500, where the light passing states include light passing and light non-passing;
the optical isolator 600 includes an optical isolation optical path and an optical coupling optical path;
the first relay port 400 is connected to an optical isolation optical path, and configured to perform optical isolation on the second optical signal;
the second relay port 500 is connected to the optical coupling optical path, and is configured to couple the second optical signal to the output end of the optical isolator 600, so that the second optical signal is transmitted to another external terminal device through the output end of the optical isolator 600.
It should be noted that, in the dual-mode switchable optical splitter provided by the present invention, an optical signal is split into two optical signals by the wavelength division multiplexer 200, wherein one optical signal is injected into a terminal device, the other optical signal enters the first relay port 400 or the second relay port 500 through the optical switch of the optical path switch 300, and meanwhile, the first relay port 400 and the second relay port 500 are respectively connected to the optical isolation optical path and the optical coupling optical path of the optical isolator 600, when the optical path switch 300 is switched to the first relay port 400 to be switched to be on, the optical isolation of the optical signal entering the first relay port 400 is realized, so as to realize single optical path transmission, so that when the optical splitter does not need to monitor a fault without a light splitting function, the optical signal is transmitted in a single optical path according to an original path, and the optical power loss is also reduced; and when light path change-over switch 300 switches to second trunk port 500 and leads to light, then realize leading to light to the light signal that gets into second trunk port 500 to realize double-optical-path transmission, so that when needing to use the beam split function to carry out troubleshooting, transfer optical isolator 600 to "double-optical-path" transmission mode, the beam splitter divides the light path, realize that process level switch and switch front side device data gather in real time, double-optical-path parallel transmission promptly, carry out real-time monitoring and degree of depth fault location to the network, thereby the elimination trouble.
Meanwhile, the same optical isolator 600 is shared by single-optical-path transmission and double-optical-path transmission, so that the compact size of the optical splitter is facilitated, the defect that a standby optical fiber port is covered when the optical splitter is additionally mounted on a switch is effectively overcome, and the normal use and operation of each layer of switch are ensured; meanwhile, the plugging times are reduced, the risk of mistaken plugging is reduced, continuous light splitting is not needed through switching of light splitting and non-light splitting functions, and the phenomena that the optical fiber loop is seriously attenuated due to long-term use of the light splitter, and then error codes or even data cannot be received by data received by back-end equipment are caused are avoided.
In one embodiment, as shown in fig. 2, the wavelength division multiplexer 200 is provided with a dual fiber head 201, a G lens 202, a spectroscopic medium film 203, a C lens 204, and a first single fiber head 205 in this order along the optical axis.
In this embodiment, after receiving the optical signal emitted from the optical port 100, one of the optical fibers of the dual optical fiber head 201 is collimated by the G lens 202, and the optical signal is converted into reflected light and transmitted light by the spectroscopic dielectric film 203 through reflection and interference of light, where the reflected light is incident to an external terminal device along the other optical fiber of the dual optical fiber head 201, and the transmitted light is transmitted to the C lens 204 and is collimated again, and enters the first single optical fiber head 205.
The G lens is a G-lens and is a self-focusing lens; the material of the C-lens is different from that of a common lens, the C-lens adopts a material with high refractive index in an optical fiber communication waveband, the material has good acid-base corrosion resistance, and the transmittance of the C-lens for the optical fiber communication waveband can reach over 99.9 percent under the condition that antireflection films are plated on two end faces of the C-lens.
In a specific embodiment, the ratio of the optical power of the first optical signal to the second optical signal is 3: 1.
Specifically, the optical power is distributed by using the wavelength division multiplexer 200 according to the branch splitting ratio of 3:1, that is, 75% of optical signals are connected to a terminal device, such as a process layer switch, according to the original path, so that transmission of the signals in the whole network is not affected, and other 25% of optical signals enter the optical isolator 600.
In a specific embodiment, as shown in fig. 3, the optical isolator 600 is provided with a second single fiber head 601, a first collimator 602, a first wedge-shaped birefringent crystal 603, a 45 ° faraday rotator 604, a second wedge-shaped birefringent crystal 605, a second collimator 606, and a third single fiber head 607 in this order along the optical axis; an included angle between a refraction surface of the first wedge-shaped birefringent crystal 603 far away from the Faraday rotator and an optical axis is 45 degrees, an included angle between a refraction surface of the second wedge-shaped birefringent crystal 605 far away from the Faraday rotator and the optical axis is 135 degrees, a magnet 608 is arranged on the outer side of the 45-degree Faraday rotator 604, and the magnet 608 is used for providing a magnetic field;
the optical isolator comprises a third single optical fiber head 607, a second collimator 606, a second wedge-shaped birefringent crystal 605, a 45-degree Faraday rotator 604, a first wedge-shaped birefringent crystal 603, a first collimator 602 and a second single optical fiber head 601 which are sequentially connected to form an optical isolation optical path, wherein a first relay port 400 is connected with the third single optical fiber head 607;
the second single optical fiber head 601, the first collimator 602, the first wedge-shaped birefringent crystal 603, the 45-degree faraday rotator 604, the second wedge-shaped birefringent crystal 605, the second collimator 606 and the third single optical fiber head 607 are sequentially connected to form an optical coupling path, and the second relay port 500 is connected with the second single optical fiber head 601.
In practical application, the working process of the optical isolator 600 is as follows:
when light splitting is not needed, the optical path switch 300 is switched to the first relay port 400 to transmit light, the second optical signal enters the third single fiber head 607 of the optical isolator 600 through the first relay port 400, and after being collimated by the second collimator 606, due to the non-reciprocity of the faraday rotator, the second optical signal passes through the second wedge birefringent crystal 605 and is divided into o light and e light with the polarization plane forming an included angle of 45 degrees with the crystal optical axis of the first wedge birefringent crystal 603, since the two linearly polarized light beams pass through the 45 ° faraday rotator 604, the rotation direction of the vibration plane is determined by the magnet 608, without being influenced by the light propagation direction, the vibration plane rotates 45 degrees clockwise, the first wedge birefringent crystal 603 further separates the light signals by a larger included angle, and is deflected by the first collimator 602 so as not to be coupled into the second single fiber head 601, thereby achieving the purpose of optical isolation.
When light splitting is required, the optical path switch 300 is switched to the second relay port 500 to pass light, the second optical signal passes through the second relay port 500 to enter the second single optical fiber head 601 of the optical isolator 600, after being collimated by the first collimator 602 and passing through the first wedge-shaped birefringent crystal 603, the optical signal is split into o light and e light, the polarization directions of the o light and the e light are mutually perpendicular, and the propagation direction forms an included angle.
In one embodiment, the wavelength division multiplexer 200 is connected to the optical path switch 300 via an LC fiber connector.
It can be understood that manual operation is convenient for through configuration LC adapter, and the optical path loss has multiple reasons to cause, has dirty if the terminal surface, and the optical cable is crooked to cause reasons such as optical path loss, but the pluggable device of being convenient for change does not influence other devices normal work and operation simultaneously to other equipment of will being compatible, so, the pluggable can improve work efficiency greatly, reduce fortune dimension cost.
In a specific embodiment, the optical module further includes a ceramic housing, and the optical input port 100, the wavelength division multiplexer 200, the optical path switch 300, the first relay port 400, the second relay port 500, and the optical isolator 600 are all packaged in the ceramic housing.
The optical splitter can have the advantages of high precision and miniaturization through the ceramic shell packaging. Meanwhile, in practical application, the volume of the optical splitter in the embodiment is only 1/2 of the traditional optical splitter, so that the defect that a standby optical fiber port is covered when the optical splitter is additionally installed on a switch is effectively overcome, and the normal use and operation of each layer of switch are ensured.
The optical power loss of the traditional optical splitter is usually about 3.5dB-4dB, while the optical power loss of the optical splitter of the embodiment is only 1.2dB, which is less than one third of that of the traditional optical splitter, so that the reliability and the stability of the device are guaranteed.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (6)
1. A dual mode switchable splitter, comprising: the optical isolator comprises an optical inlet port, a wavelength division multiplexer, an optical path change-over switch, a first relay port, a second relay port and an optical isolator;
the light inlet port is used for receiving an optical signal sent by a working light source and transmitting the optical signal to the wavelength division multiplexer;
the wavelength division multiplexer is used for dividing the optical signal into a first optical signal and a second optical signal, injecting the first optical signal into an external terminal device, and injecting the second optical signal into the optical path change-over switch;
the output end of the optical path changeover switch is respectively connected with the first relay port and the second relay port and is used for switching the light passing states of the first relay port and the second relay port, wherein the light passing states comprise light passing state and light non-passing state;
the optical isolator comprises an optical isolation light path and an optical coupling light path;
the first relay port is connected with the optical isolation optical path and is used for performing optical isolation on the second optical signal;
the second relay port is connected with the optical coupling optical path and is used for coupling the second optical signal to the output end of the optical isolator, so that the second optical signal is transmitted to another external terminal device through the output end of the optical isolator.
2. A dual mode switchable splitter according to claim 1 wherein the wavelength division multiplexer has a dual fiber head, a G lens, a splitting dielectric film, a C lens and a first single fiber head arranged in sequence along the optical axis.
3. The dual mode switchable splitter of claim 1, wherein a ratio of optical power of the first optical signal to the second optical signal is 3: 1.
4. A dual-mode switchable splitter as claimed in claim 1 wherein the optical isolator has a second single fiber head, a first collimator, a first wedge birefringent crystal, a 45 ° faraday rotator, a second wedge birefringent crystal, a second collimator and a third single fiber head arranged in that order along the optical axis; an included angle between a refraction surface of the first wedge-shaped birefringent crystal, which is far away from the Faraday rotator, and an optical axis is 45 degrees, an included angle between a refraction surface of the second wedge-shaped birefringent crystal, which is far away from the Faraday rotator, and the optical axis is 135 degrees, and a magnet is arranged on the outer side of the 45-degree Faraday rotator and used for providing a magnetic field;
the third single optical fiber head, the second collimator, the second wedge-shaped birefringent crystal, the 45-degree faraday rotator, the first wedge-shaped birefringent crystal, the first collimator and the second single optical fiber head are sequentially connected to form the optical isolation optical path, and the first relay port is connected with the third single optical fiber head;
the second single optical fiber head, the first collimator, the first wedge-shaped birefringent crystal, the 45-degree faraday rotator, the second wedge-shaped birefringent crystal, the second collimator and the third single optical fiber head are sequentially connected to form the optical coupling optical path, and the second relay port is connected with the second single optical fiber head.
5. The dual mode switchable splitter of claim 1, wherein the wavelength division multiplexer is connected to the optical path switch by an LC fiber connector.
6. The dual mode switchable splitter of claim 1, further comprising a ceramic housing, the optical input port, the wavelength division multiplexer, the optical circuit switch, the first trunk port, the second trunk port, and the optical isolator all enclosed within the ceramic housing.
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| CN1419143A (en) * | 2002-12-12 | 2003-05-21 | 华中科技大学 | Optical path mixing device |
| CN202003105U (en) * | 2010-12-28 | 2011-10-05 | 福州高意通讯有限公司 | Optical isolator |
| CN204945528U (en) * | 2015-10-15 | 2016-01-06 | 福建中策光电股份公司 | A kind of polarization has nothing to do fibre optic isolater |
| CN105938223A (en) * | 2016-06-30 | 2016-09-14 | 苏州伽蓝致远电子科技股份有限公司 | Low-loss four-port hybrid two-wavelength wavelength division multiplexing optical passive device |
| CN108873176A (en) * | 2018-06-12 | 2018-11-23 | 东南大学 | A kind of close-coupled three-dimensional Wavelength division multiplexer/demultiplexer and implementation method |
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