Optical device

Abstract

The invention belongs to the technical field of optical communication devices, and provides an optical device which comprises a base, an emitter To and a receiver To, the emitter To and the receiver To are arranged at the end of the base, a shell used for being connected with double optical fibers is arranged at the end, away from the emitter To, of the base, a cavity is formed in the base, the shell is communicated with the cavity, and the cavity is communicated with the receiver To. A lens assembly and a filtering piece are arranged in the cavity and the shell, the lens assembly is used for light beam conversion, the filtering piece is used for wave division, the filtering piece is arranged between the lens assembly and the transmitter To, the scheme of the diaphragm, the lens module and the double-fiber light wave introduction is adopted, an external wavelength division multiplexer is replaced, and the overall size is smaller.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical communication devices, and in particular relates to an optical device. Background Art

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

[0003] With the rapid development of access networks, FTTH (Fiber to the Home) integrated services are becoming more and more popular, and high-bandwidth access services such as online education, telemedicine, 4K video, and virtual reality are developing continuously. The gigabit bandwidth supported by the GPON network (Gigabit-Capable Passive Optical Network) is difficult to meet the growing demand for high-bandwidth services, and needs to be upgraded to 10G broadband - 10G PON.

[0004] In the process of upgrading GPON to 10G PON, traditional broadband services, if users upgrade GPON to 10GPON. From the equipment perspective: the OLT (optical line terminal) equipment on the network side needs to be upgraded; the user side needs to be replaced with a 10G PON terminal, which increases costs. From the service perspective: a second visit is required, resulting in service interruption.

[0005] Combo PON is a combination of GPON and 10G PON. Its principle is to perform wavelength division multiplexing on four different carrier wavelengths based on the independent transmission and reception of GPON and 10G PON optical signals. It is compatible with existing GPON network services and 10G PON services. When the user bandwidth demand is not high, GPON access is used. When the user bandwidth demand is high, the operator only needs to remotely switch the ONU (Optical Network Unit) configuration to achieve network upgrades without having to replace the optical modem, which greatly expands the adaptability of the network and reduces the replacement cost of the operator.

[0006] At present, Combo ONU optical devices mainly include GPON ONU, 10G PON and WDM coupler. GPON ONU and WDM, 10G PON and WDM are connected by optical fiber. WDM splits the light waves and makes them enter GPON ONU and 10G PON accordingly. However, since WDM is external, WDM connects the corresponding optical devices through optical fiber, and a fixed structure needs to be added to the optical modem to fix WDM, which occupies a large volume and easily leads to low optical integration. Summary of the invention

[0007] In order to solve the above problems, the present invention proposes an optical device, which adopts a membrane and lens module and a dual-fiber light wave introduction solution, can be directly integrated into the optical transceiver module interface component, replacing the external wavelength division multiplexer, and has a smaller overall volume and shorter size.

[0008] According to some embodiments, the present invention adopts the following technical solutions:

[0009] An optical device comprises a base, a transmitter To and a receiver To, wherein the transmitter To and the receiver To are arranged at the ends of the base, a shell for connecting dual optical fibers is arranged at one end of the base away from the transmitter To, a cavity is arranged in the base, the shell is connected to the cavity, and a lens assembly and a filter are arranged in the cavity and the shell.

[0010] Furthermore, the lens assembly includes a first lens, a second lens and a membrane, the first lens, the membrane and the second lens are coaxially arranged, and the membrane is arranged between the first lens and the second lens.

[0011] Furthermore, the first lens is arranged between the transmitter To and the filter, and the membrane and the second lens are arranged at one end of the filter element close to the dual optical fibers.

[0012] Furthermore, the first lens, the second lens and the membrane are all arranged at one end of the filter element close to the dual optical fibers.

[0013] Furthermore, it also includes a protective cover, which is arranged outside the shell.

[0014] Furthermore, a glass sleeve is provided in the shell, and the glass sleeve is provided with two optical fiber holes for fixing dual optical fibers.

[0015] Furthermore, the filter element includes a first filter and a second filter, the first filter is arranged between the transmitter To and the lens assembly, and the second filter is located above the first filter.

[0016] Furthermore, an angle difference is set between the first filter and the second filter.

[0017] Furthermore, the filter element is disposed between the lens assembly and the transmitter To, and the filter element includes a first filter, a second filter and a third filter, and the first filter is located between the third filter and the transmitter To.

[0018] Furthermore, an angle is set between the first filter and the third filter, and between the third filter and the second filter.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The optical device described in the present invention adopts a membrane, a first lens, a second lens and a dual optical fiber to introduce light waves, and can be directly integrated into an optical transceiver module interface component, replacing an external wavelength division multiplexer, with an overall smaller volume and shorter size.

[0021] An optical device provided in this embodiment uses a lens as a carrier of a membrane, which can achieve lower wavelength loss and higher wavelength isolation, and has better performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0023] Figure 1 This is a first structural diagram of the first embodiment of the present invention;

[0024] Figure 2 is a second structural diagram of the first embodiment of the present invention;

[0025] Figure 3 It is a third structural diagram of the first embodiment of the present invention.

[0026] 1. Base; 2. Transmitter To; 3. Receiver To; 4. Shell; 5. First lens; 6. Second lens; 7. First filter; 8. Second filter; 9. Third filter; 10. First optical fiber; 11. Second optical fiber; 12. Glass sleeve; 13. Diaphragm; 14. Protective cover. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] It should be noted that the following detailed descriptions are all illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0029] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the term "comprising" is used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0030] In the present invention, the directions or positional relationships indicated by terms such as "upper", "vertical", "horizontal", "upward", "downward", etc. are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention. They do not specifically refer to any part or element in the present invention and cannot be understood as limitations on the present invention.

[0031] In the present invention, terms such as "fixed" and "fixed" should be understood in a broad sense, indicating that it can be fixedly connected, integrally connected or detachably connected. Relevant scientific research or technical personnel in this field can determine the specific meanings of the above terms in the present invention according to specific circumstances, and they should not be understood as limiting the present invention.

[0032] This embodiment provides an optical device to solve the problems that the wavelength division multiplexer and its housing of the Combo PON are large in size, have low optical integration, and are inconvenient to use.

[0033] This embodiment provides an optical device, such as Figure 1 As shown, it includes: a base 1, a receiver To3 and a transmitter To2.

[0034] The base 1 is provided with a receiving end for mounting the receiver To3 and a transmitting end for the transmitter To2, and a cavity and a shell 4 for connecting dual optical fibers are also provided in the base 1. The shell 4 is connected to the end of the base 1 away from the transmitting end, and the inside of the shell 4 is connected to the cavity. A glass sleeve 12 is fixedly provided in the shell 4, and two optical fiber holes for fixing the dual optical fibers are provided in the glass sleeve 12. In this embodiment, the glass sleeve 12 can be cured in the shell 4 by UV glue. In addition, a protective cover 14 is provided outside the shell 4 to protect the shell 4 and reduce collision.

[0035] The dual optical fiber includes a first optical fiber 10 and a second optical fiber 11. The access ends of the first optical fiber 10 and the second optical fiber 11 are inserted into the corresponding optical fiber holes in the glass sleeve 12, and the first optical fiber 10 and the second optical fiber 11 are fixed by a baking process. There is a certain angle difference between the access ends of the first optical fiber 10 and the second optical fiber 11, so that the light beam is better transmitted between the first optical fiber 10 and the second optical fiber 11.

[0036] A lens assembly and a filter are arranged in the cavity and the housing 4. The lens assembly is used to convert the light beam, and the filter is used to filter and reflect. The filter is arranged between the lens assembly and the transmitter To.

[0037] The filter element includes a first filter 7 and a second filter 8. The first filter 7 is located between the transmitter To2 and the lens assembly. The first filter 7 is tilted relative to the horizontal plane. The first filter 7 is used to reflect and filter the light beam containing multiple wavelengths. The second filter 8 is located above the first filter 7. The second filter 8 is set at 0° relative to the horizontal plane. The second filter 8 is used for filtering and transmission. The first filter 7 and the second filter 8 are set at an angle. In this embodiment, the angle between the first filter 7 and the second filter 8 is 45°.

[0038] At the same time, the lens assembly is arranged between the dual optical fibers and the filter element, and the lens assembly includes a first lens 5, a second lens 6 and a diaphragm 13. The first lens 5, the second lens 6 and the diaphragm 13 are coaxially arranged, and the diaphragm 13 is arranged between the first lens 5 and the second lens 6. The first lens 5 is arranged in the cavity and is located at one end of the filter element close to the dual optical fibers, and the second lens 6 is arranged in the housing 4 and is located at one end of the first lens 5 close to the dual optical fibers. In this embodiment, the diaphragm 13 can be attached to one end of the second lens 6 facing the transmitter To2, and the distance between the diaphragm 13 and the first lens 5 is in the range of 3-4mm. The diaphragm and the second lens are both provided with UV glue for curing.

[0039] In this embodiment, the end of the second lens 6 close to the dual optical fibers is an inclined plane, and the end close to the membrane 13 is a plane, so that the light beam can better enter the first optical fiber 10 or exit from the second optical fiber 11. The end of the first lens 5 close to the dual optical fibers is a curved surface, and the end close to the filter is a plane, so that the light beam can be converted into parallel light or convergent light.

[0040] The thickness and filtering of the membrane 13 can be selected according to the transmission requirements of the light beam, so as to transmit the required wavelength and then enter the optical fiber at the other end.

[0041] In this embodiment, when the transmitter To2 emits a light beam, it is filtered by the first filter 7, converted into parallel light by the first lens 5, and the diaphragm 13 transmits the converted parallel light. The light beam is refracted by the second lens 6 and enters the second optical fiber 11 for transmission. When the external light beam is incident from the first optical fiber 10, it is adjusted to parallel light by the second lens 6 and transmitted by the diaphragm 13 in sequence. The first lens 5 can convert the light beam into convergent light, and then enter the receiver To3 for transmission of light waves after being reflected and filtered by the first filter 7 and the second filter 8 in sequence.

[0042] The optical device can be any BOSA type among GPON, XGS-PON, 25GPON, and 50G-PON, and can be used in combination with another BOSA type optical device among GPON, XGS-PON, 25GPON, and 50G-PON to form an optical device with integrated multi-wavelength coexistence conversion.

[0043] In this embodiment, the wavelength range of the light beam emitted by the transmitter To can be any two wavelengths of 1270nm / 1310nm / 1286nm / 1300nm, and the wavelength range of the light beam incident from the outside through the first optical fiber can be any two wavelengths of 1577nm / 1490nm / 1358nm / 1342nm.

[0044] Taking GPON and 10G PON BOSA as examples, the wavelength of the emitted light beam can be 1310nm, and the wavelength of the incident light beam of the first optical fiber can be 1490nm. If the wavelength is changed, the relevant technical changes on the diaphragm can also be made, and the wavelength of the emitted light beam can be 1270nm, and the wavelength of the incident light beam of the first optical fiber can be 1577nm.

[0045] As another embodiment, Figure 2 As shown, the first lens 5 may be located between the emitter To2 and the first filter 7. At this time, the end of the first lens 5 close to the emitter To2 is a plane, and the end close to the first filter 7 is a curved surface. The light beam emitted by the emitter To2 is converted into parallel light by the first lens 5 and is filtered by the first filter 7. In this embodiment, the distance between the emitter To2 and the first lens 5 is in the range of 5-6 mm.

[0046] As another implementation, the convex lens at the transmitting end of the transmitter To2 can be replaced by a plane mirror. In this case, the light emitted from the transmitter To2 is parallel light, and thus the first lens 5 can be omitted.

[0047] As another embodiment, Figure 3As shown, the optical device can be a Tri OSA type. In this case, there are two receivers To3, and the two receivers To3 are respectively arranged at the upper and lower ends of the filter. At this time, the filter includes not only the first filter 7 and the second filter 8, but also the third filter 9. The third filter 9 is located between the first filter 7 and the lens assembly. An angle is set between the first filter and the third filter and between the third filter and the second filter. The second filter 8 is set at 0° relative to the horizontal plane. The first filter 7 and the third filter 9 are set in an eight-shaped tilted arrangement, and the angle between the first filter 7 and the third filter 9 is 90 degrees. At this time, the end of the first lens 5 facing the transmitter To2 is a plane, and the end close to the dual optical fiber is a convex surface. After the wavelength of the incident light beam entering from the outside passes through the first optical fiber 10, the second lens 6, the membrane 13, and the first lens 5, the first filter 7 splits the wavelength of the incident light beam, so that part of the wavelength is reflected and transmitted to the upper receiver To, and the other wavelength passes through the first filter 7 and is reflected by the third filter 9 and transmitted to the lower receiver To. The wavelength of the emission light beam generated by the transmitter To2 is transmitted to the first optical fiber and the second optical fiber through the first filter 7, the third filter 9, the first lens 5, the membrane 13 and the second lens 6 in sequence to communicate with the outside.

[0048] An optical device provided in this embodiment adopts a solution of diaphragm + lens module + dual-fiber light wave introduction, replacing an external wavelength division multiplexer. The overall volume is smaller and the size is shorter. At the same time, lower wavelength loss and higher wavelength isolation can be achieved, and the performance is better.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An optical device, characterized in that: It includes a base, a transmitter To and a receiver To, wherein the transmitter To and the receiver To are arranged at the ends of the base, a shell for connecting dual optical fibers is arranged at one end of the base away from the transmitter To, a cavity is arranged in the base, the shell is connected to the cavity, and a lens assembly and a filter are arranged in the cavity and the shell.

2. An optical device according to claim 1, characterized in that: The lens assembly includes a first lens, a second lens and a membrane. The first lens, the membrane and the second lens are coaxially arranged, and the membrane is arranged between the first lens and the second lens.

3. An optical device according to claim 2, characterized in that: The first lens is arranged between the transmitter To and the filter, and the membrane and the second lens are arranged at one end of the filter element close to the dual optical fibers.

4. An optical device according to claim 2, characterized in that: The first lens, the second lens and the membrane are all arranged at one end of the filter element close to the dual optical fibers.

5. The optical device according to claim 1, characterized in that: It also includes a protective sleeve, which is sleeved outside the shell.

6. The optical device according to claim 1, characterized in that: A glass sleeve is arranged in the shell, and the glass sleeve is provided with two optical fiber holes for fixing dual optical fibers.

7. An optical device according to claim 1, characterized in that: The filter element includes a first filter and a second filter. The first filter is disposed between the emitter To and the lens assembly, and the second filter is located above the first filter.

8. An optical device according to claim 7, characterized in that: An angle difference is set between the first filter and the second filter.

9. The optical device according to claim 1, characterized in that: The filter element is disposed between the lens assembly and the transmitter To, and the filter element includes a first filter, a second filter, and a third filter. The first filter is located between the third filter and the transmitter To.

10. An optical device according to claim 9, characterized in that: An included angle is set between the first filter and the third filter, and between the third filter and the second filter.

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