Optical device for transmitting six wavelengths through single connector and optical network system

Abstract

The invention belongs to the field of optical communication devices, and provides an optical device for transmitting six wavelengths through a single connector and an optical network system. The optical device for transmitting six wavelengths through the single connector comprises a transmitting part, a receiving part, a wave dividing part and a receiving and transmitting light part. The transmitting part comprises three transmitting ends, namely a first transmitting end, a second transmitting end and a third transmitting end, and is used for transmitting optical signals with different preset wavelengths and transmitting the optical signals to the receiving and transmitting part through the wave division part; and the receiving part comprises three receiving ends, namely a first receiving end, a second receiving end and a third receiving end, and is used for receiving the corresponding preset optical signals transmitted to the wave division part by the receiving and transmitting optical part and converting the corresponding preset optical signals into corresponding electric signals. Stable and efficient six-wavelength transmission can be realized under the condition of a single connector.

Description

Technical Field

[0001] The present invention belongs to the field of optical communication devices, and particularly relates to an optical device and an optical network system for transmitting six wavelengths with a single connector. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] With the expansion of the application fields of PON (Passive Optical Network) technology, different application fields have different requirements for bandwidth; moreover, in combination with the evolution process of PON technology, the corresponding optical transmission hardware facilities need to be compatible with the two-wavelength optical signals involved in each generation of PON technology.

[0004] In order to achieve the purpose of making the optical transmission hardware facilities compatible with six-wavelength optical signals, usually multiple connectors of optical devices are assembled to achieve the ability to transmit multi-wavelength optical signals. However, this assembly method uses a large number of connectors of optical devices, increasing the cost of the entire optical signal transmission system, and the assembly process is complex, the optical path structure is long, and even the stability of optical signal transmission is affected, unable to meet the growing demand for high-speed data transmission. Summary of the Invention

[0005] In order to solve the technical problems existing in the above background art, the present invention provides an optical device and an optical network system for transmitting six wavelengths with a single connector, which can achieve stable and efficient six-wavelength transmission under a single connector.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: The first aspect of the present invention provides an optical device for transmitting six wavelengths with a single connector.

[0007] An optical device for transmitting six wavelengths with a single connector includes: A transmitting part, a receiving part, a wavelength division part, and a light transmitting and receiving part; The transmitting part includes three transmitting ends, namely a first transmitting end, a second transmitting end, and a third transmitting end, which are used to transmit different preset wavelength optical signals and transmit them to the light transmitting and receiving part through the wavelength division part; The receiving part includes three receiving ends, namely a first receiving end, a second receiving end, and a third receiving end, which are used to receive the corresponding preset optical signals transmitted from the light transmitting and receiving part to the wavelength division part and convert them into corresponding electrical signals.

[0008] As an implementation manner, the transmitting end includes a laser diode and a voltage source connected thereto.

[0009] As an implementation manner, the receiving end is a photodetector.

[0010] As an implementation manner, the light transceiver is an optical fiber connector.

[0011] As an implementation manner, the wavelength division unit includes a first filter, a second filter, a third filter, a fourth filter, and a fifth filter; The first filter, the second filter, the third filter, and the light transceiver are arranged in sequence along the transmission direction of the optical signal emitted by the first transmitting end; The third filter, the fourth filter, and the fifth filter are arranged in sequence along the transmission direction of the optical signal received by the second receiving end.

[0012] As an implementation manner, the second transmitting end and the third transmitting end are respectively arranged corresponding to the first filter and the second filter; after the optical signal emitted by the second transmitting end is reflected by the first filter, it is then filtered by the second filter and the third filter in sequence and then transmitted to the light transceiver; the optical signal emitted by the third transmitting end is reflected by the second filter and then filtered by the third filter and then transmitted to the light transceiver.

[0013] As an implementation manner, the first receiving end and the third receiving end are respectively arranged corresponding to the fourth filter and the fifth filter; the first receiving end receives the optical signal transmitted by the light transceiver and reflected by the third filter and the fourth filter in sequence; the third receiving end receives the optical signal transmitted by the light transceiver, reflected by the third filter, filtered by the fourth filter, and finally reflected by the fifth filter.

[0014] As an implementation manner, the second transmitting end and the third transmitting end are arranged on the same side or both sides of the transmission direction of the optical signal emitted by the first transmitting end.

[0015] As an implementation manner, the first receiving end and the third receiving end are arranged on the same side or both sides of the transmission direction of the optical signal received by the second receiving end.

[0016] The second aspect of the present invention provides an optical network system.

[0017] An optical network system includes: the optical device for transmitting six wavelengths with a single connector as described above; the light transceiver of the optical device for transmitting six wavelengths with a single connector is connected to an optical fiber.

[0018] The beneficial effects of the present invention are: (1) The present invention integrates the transmitting part, receiving part, wavelength division part, and optical transceiver part into one, combining the functions of optical signal transmission, propagation, wavelength division, and reception. It realizes the transmission of six wavelengths through a single connector, greatly simplifies the overall architecture, reduces the volume of the entire optical device, making the optical device of the present invention suitable for scenarios with strict requirements for equipment space, effectively saving equipment installation space, improving space utilization rate, and providing a more convenient solution for system integrators.

[0019] (2) The optical device for transmitting six wavelengths through a single connector of the present invention abandons the complex and cumbersome optical path architecture in traditional multi-wavelength optical devices. From the light source emission to signal transmission and then to the conversion at the receiving end, by arranging the filter in the wavelength division part, it accurately guides each wavelength of optical signal to be transmitted along a predetermined path, avoiding energy losses such as multiple refractions and scatterings of optical signals in the complex optical path, ensuring both the high efficiency of optical signal transmission and reducing the risk of signal interference caused by the complex optical path, and significantly improving the reliability of the system. (3) The optical device for transmitting six wavelengths through a single connector of the present invention is integrated according to the four modules of the transmitting part, receiving part, wavelength division part, and optical transceiver part. The transmitting part and receiving part of the present invention are separated, with a large space and easy to operate and assemble. Moreover, the transmitted light will not interfere with the receiving part. The receiving part omits the 0-degree filter. The entire device assembly process is relatively simple, and the connection method between components is simple and easy to implement, reducing the complexity and error probability of manual operation, facilitating mass production, and quickly meeting the large market demand for high-performance optical devices.

[0020] The advantages of the additional aspects of the present invention will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0021] The specification drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0022] Figure 1 It is a schematic structural diagram of an optical device for transmitting six wavelengths through a single connector according to an embodiment of the present invention.

[0023] Figure 2 It is a schematic structural diagram of another optical device for transmitting six wavelengths through a single connector according to an embodiment of the present invention.

[0024] Among them, 1. First transmitting end; 2. Second transmitting end; 3. Third transmitting end; 4. First receiving end; 5. Second receiving end; 6. Third receiving end; 7. First filter; 8. Second filter; 9. Third filter; 10. Fourth filter; 11. Fifth filter; 12. Optical fiber connector. Detailed Embodiments

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0028] In the present invention, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only relational terms determined for the convenience of describing the structural relationship of each component or element of the present invention and do not specifically refer to any component or element of the present invention. It should not be construed as a limitation of the present invention.

[0029] In the present invention, terms such as "fixed connection", "connected", "connected" should be understood in a broad sense, which may mean a fixed connection, an integral connection or a detachable connection; it may be directly connected or indirectly connected through an intermediate medium. For those related scientific research or technical personnel in the field, the specific meaning of the above terms in the present invention can be determined according to specific circumstances and should not be construed as a limitation of the present invention.

[0030] PON technology has evolved from the first-generation GPON using two conventional wavelengths of 1310 nm and 1490 nm to the wavelengths of 1270 nm and 1577 nm of the second-generation 10G PON, and then to the wavelengths of 1286 nm and 1342 nm of the third-generation 50G PON. Considering the cost of large-system deployment, the overall smooth evolution involves the simultaneous compatibility and use of all involved wavelengths, which increases the technical difficulty. In the process of 50G PON construction, how to achieve the coexistence of the first-generation GPON, the second-generation 10G PON, and the next-generation 50G PON with high cost performance and achieve smooth evolution has become the common direction of efforts in the optical communication field.

[0031] Figure 1 A schematic structural diagram of an optical device with a single connector transmitting six wavelengths in an embodiment of the present invention is given. In combination with Figure 1, an optical device for transmitting six wavelengths with a single connector according to an embodiment of the present invention includes: a transmitting part, a receiving part, a wavelength division part, and a transmitting and receiving part.

[0032] Specifically, the transmitting part includes three transmitting ends, namely a first transmitting end 1, a second transmitting end 2, and a third transmitting end 3, which are used to transmit optical signals of different preset wavelengths and transmit them to the transmitting and receiving part through the wavelength division part. In this way, at least three wavelengths can be converted from electrical signals to optical signals and transmitted out through the same connector.

[0033] The receiving part includes three receiving ends, namely a first receiving end 4, a second receiving end 5, and a third receiving end 6, which are used to receive the corresponding preset optical signals transmitted from the transmitting and receiving part to the wavelength division part and convert them into corresponding electrical signals. In this way, at least three wavelengths can be converted from optical signals to electrical signals and transmitted out through the same connector.

[0034] In the specific implementation process, the optical propagation paths of the transmitting part, the receiving part, the wavelength division part, and the transmitting and receiving part are all connected by an optical waveguide structure, and the optical waveguide structure here is an existing structure.

[0035] In some specific embodiments, the transmitting end includes a laser diode and a voltage source connected thereto.

[0036] When a suitable forward voltage is applied to the laser diode to power it on, electrons and holes in the laser diode recombine to generate stimulated emission, and then an optical signal of the corresponding wavelength is emitted.

[0037] It should be noted here that in other embodiments, in addition to using the structure of a laser diode, the transmitting end can also be implemented by other existing laser emission structures, which will not be elaborated here.

[0038] In this embodiment, the receiving end is a photodetector. The photodetector is used to convert the received corresponding optical signal into an electrical signal.

[0039] In this way, when a certain transmitting end or receiving end fails during the use of the optical device, only the faulty transmitting end or receiving end needs to be disassembled, detected, and repaired, without disassembling the entire optical device, greatly reducing the maintenance cost and time cost.

[0040] In this embodiment, the transmitting and receiving part is a fiber optic connector 12, which is used to connect an external optical fiber to receive and transmit optical signals of different wavelengths, or transmit the external input optical signals of different wavelengths to the corresponding receiving end of the receiving part.

[0041] For example, for the third-generation PON technology, the optical device with a single connector for transmitting six wavelengths according to the embodiments of the present invention can achieve the coexistence of three modes and six wavelengths in the third-generation PON technology: the wavelengths of the first-generation GPON are 1310 nm and 1490 nm respectively, the wavelengths of the second-generation 10GPON are 1270 nm and 1577 nm respectively, and the wavelengths of the third-generation 50G PON are 1286 nm and 1342 nm respectively.

[0042] The transmitting part and the receiving part in the optical device with a single connector for transmitting six wavelengths according to the embodiments of the present invention operate independently of each other and do not interfere with each other. Moreover, according to the actual situation, both the transmitting part and the receiving part can be respectively expanded to be compatible with more wavelengths, which can fully meet the diverse optical communication requirements and provide strong support for high-speed and stable data transmission.

[0043] In this embodiment, the wavelength division part includes a first filter 7, a second filter 8, a third filter 9, a fourth filter 10, and a fifth filter 11; the first filter 7, the second filter 8, the third filter 9, and the light transmitting and receiving part are arranged in sequence along the transmission direction of the optical signal emitted by the first transmitting end; the third filter 9, the fourth filter 10, and the fifth filter 11 are arranged in sequence along the transmission direction of the optical signal received by the second receiving end.

[0044] According to Figure 1 it can be known that the first filter 7 and the second filter 8 are arranged close to the transmitting part; the fourth filter 10 and the fifth filter 11 are arranged close to the receiving part. Specifically, the optical signal emitted by the first transmitting end is first transmitted to the optical fiber connector 12 after being filtered by the three filters of the first filter 7, the second filter 8, and the third filter 9.

[0045] During the transmission of the optical signal, the first filter 7, the second filter 8, and the third filter 9 have high transmittance for the wavelength optical signal emitted by the first transmitting end. Combining with the multi-layer nested optical waveguide structure to guide and constrain the optical signal, it ensures that the optical signal is transmitted in a low-loss state and realizes the efficient conversion of electrical signals to optical signals.

[0046] In this embodiment, the second transmitting end and the third transmitting end are respectively arranged corresponding to the first filter 7 and the second filter 8; the optical signal emitted by the second transmitting end is reflected by the first filter 7 and then transmitted to the light transmitting and receiving part after being filtered by the second filter 8 and the third filter 9 in sequence; the optical signal emitted by the third transmitting end is reflected by the second filter 8 and then transmitted to the light transmitting and receiving part after being filtered by the third filter 9.

[0047] Specifically, the first filter 7 has a high reflectivity for the optical signal emitted by the second transmitting end; the second filter 8 and the third filter 9 have a high transmittance for the optical signal emitted by the second transmitting end. The second filter 8 has a high reflectivity for the optical signal emitted by the third transmitting end; the third filter 9 has a high transmittance for the optical signal emitted by the third transmitting end.

[0048] The optical signals emitted by the first transmitting end, the second transmitting end, and the third transmitting end in this embodiment are all finally transmitted to the fiber optic connector to complete the process of converting electrical signals into optical signals, and low-loss transmission is ensured by means of the optical waveguide structure during the transmission process.

[0049] In this embodiment, as Figure 1 shown, the second transmitting end and the third transmitting end are arranged on both sides of the transmission direction of the optical signal emitted by the first transmitting end. At this time, the first filter 7 and the second filter 8 are arranged in a V-shape, and the angles between the first filter 7 and the second filter 8 and the transmission direction of the optical signal emitted by the first transmitting end can be specifically set according to the actual situation.

[0050] In some other alternative embodiments, as Figure 2 shown, the second transmitting end and the third transmitting end are arranged on the same side of the transmission direction of the optical signal emitted by the first transmitting end. At this time, the angles between the first filter 7 and the second filter 8 and the transmission direction of the optical signal emitted by the first transmitting end are the same.

[0051] Specifically, the first receiving end and the third receiving end are respectively arranged corresponding to the fourth filter 10 and the fifth filter 11; the first receiving end receives the optical signal transmitted by the fiber optic connector 12 and reflected successively by the third filter 9 and the fourth filter 10; the third receiving end receives the optical signal transmitted by the fiber optic connector 12, reflected by the third filter 9, filtered by the fourth filter 10, and finally reflected by the fifth filter 11.

[0052] In this embodiment, the third filter 9 and the fourth filter 10 have a high reflectivity for the optical signal received by the first receiving end; the third filter 9 has a high reflectivity for the fifth-wavelength optical signal, the fourth filter 10 and the fifth filter 11 have a high transmittance for the optical signal received by the second receiving end; the third filter 9 has a high reflectivity for the optical signal received by the third receiving end, the fourth filter 10 has a high transmittance for the optical signal received by the third receiving end, and the fifth filter 11 has a high reflectivity for the optical signal received by the third receiving end. The third filter 9 and the fourth filter 10 can be arranged in parallel.

[0053] In the embodiments of the present invention, the high transmittance refers to the transmittance exceeding a set ratio, such as exceeding 95% or 98%, etc. The set ratio here can be specifically set according to the actual situation; the high reflectivity refers to the reflectivity exceeding a set ratio, such as exceeding 95% or 98%, etc. The set ratio here can be specifically set according to the actual situation.

[0054] In this embodiment, as Figure 1 shown, the first receiving end and the third receiving end are arranged on both sides of the transmission direction of the optical signal received by the second receiving end. At this time, the fourth filter 10 and the fifth filter 11 have the same angle with the transmission direction of the optical signal received by the second receiving end.

[0055] In some other alternative embodiments, as Figure 2 shown, the first receiving end and the third receiving end are arranged on the same side of the transmission direction of the optical signal received by the second receiving end. At this time, the fourth filter 10 and the fifth filter 11 are arranged in parallel, and the angle between the fourth filter 10 and the fifth filter 11 and the transmission direction of the optical signal received by the second receiving end can be specifically set according to the actual situation.

[0056] It should be noted here that the transmitting part, the receiving part, and the light emitting and receiving part are all correspondingly provided with bases, and each filter in the wavelength division part is arranged in the transmitting part and the receiving part according to the actual situation. For example, the first filter 7 and the second filter 8 are arranged on the base of the transmitting part; the fourth filter 10 and the fifth filter 11 are arranged on the base of the receiving part.

[0057] In one or more embodiments, an optical network system is further provided, which includes: the single-connector transmitting six-wavelength optical device as described above Figure 1 shown; the light emitting and receiving part of the single-connector transmitting six-wavelength optical device is connected to the optical fiber.

[0058] It should be noted here that other structures in the optical network system can all be implemented by existing technologies, which will not be elaborated here.

[0059] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An optical device with a single connector for transmitting six wavelengths, characterized in that, Comprising: A transmitting part, a receiving part, a wavelength division part, and a light transmitting and receiving part; The transmitting part includes three transmitting ends, namely a first transmitting end, a second transmitting end, and a third transmitting end, which are used to transmit optical signals of different preset wavelengths and transmit them to the light transmitting and receiving part through the wavelength division part; The receiving part includes three receiving ends, namely a first receiving end, a second receiving end, and a third receiving end, which are used to receive corresponding preset optical signals transmitted from the light transmitting and receiving part to the wavelength division part and convert them into corresponding electrical signals.

2. The optical device for transmitting six wavelengths with a single connector according to claim 1, wherein The transmitting end includes a laser diode and a voltage source connected thereto.

3. The optical device for transmitting six wavelengths with a single connector according to claim 1, characterized in that, The receiving end is a photodetector.

4. The optical device for transmitting six wavelengths with a single connector according to claim 1, characterized in that The light transmitting and receiving part is an optical fiber connector.

5. The optical device for transmitting six wavelengths with a single connector according to claim 1, characterized in that, The wavelength division part includes a first filter, a second filter, a third filter, a fourth filter, and a fifth filter; The first filter, the second filter, the third filter, and the light transmitting and receiving part are arranged in sequence along the transmission direction of the optical signal emitted by the first transmitting end; The third filter, the fourth filter, and the fifth filter are arranged in sequence along the transmission direction of the optical signal received by the second receiving end.

6. The optical device for transmitting six wavelengths with a single connector according to claim 5, characterized in that, The second transmitting end and the third transmitting end are correspondingly arranged with the first filter and the second filter respectively; the optical signal emitted by the second transmitting end is reflected by the first filter and then transmitted to the light transmitting and receiving part after being filtered by the second filter and the third filter in sequence; the optical signal emitted by the third transmitting end is reflected by the second filter and then transmitted to the light transmitting and receiving part after being filtered by the third filter.

7. The optical device for transmitting six wavelengths with a single connector according to claim 5, characterized in that, The first receiving end and the third receiving end are correspondingly arranged with the fourth filter and the fifth filter respectively; the first receiving end receives the optical signal transmitted from the light transmitting and receiving part and reflected by the third filter and the fourth filter in sequence; the third receiving end receives the optical signal transmitted from the light transmitting and receiving part, reflected by the third filter, filtered by the fourth filter, and finally reflected by the fifth filter.

8. The optical device for transmitting six wavelengths with a single connector according to claim 1, wherein, The second transmitting end and the third transmitting end are arranged on the same side or both sides of the transmission direction of the optical signal emitted by the first transmitting end.

9. The optical device for transmitting six wavelengths with a single connector according to claim 1, characterized in that, The first receiving end and the third receiving end are arranged on the same side or both sides of the transmission direction of the optical signal received by the second receiving end.

10. An optical network system, characterized in that, Comprising: The single-connector six-wavelength optical device according to any one of claims 1-9; the light transmitting and receiving part of the single-connector six-wavelength optical device is connected to an optical fiber.

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