Two-in-one multi-path compact coarse wavelength division multiplexer

Abstract

The utility model relates to an optical fiber transmission technology, in particular to a two-in-one multi-path compact coarse wavelength division multiplexer, which comprises a wave combining module used for gathering a plurality of data signals together so as to be transmitted through a single optical fiber; the device also comprises a wave division module which is used for separating the optical signals which are mixed together and have different wavelengths, and transmitting the optical signals to the corresponding branch ends for output through a plurality of channels. The wave combining module and the wave dividing module are integrated on the same substrate. A wave combining module and a wave dividing module are integrated to form a single-fiber bidirectional coarse wavelength division multiplexing system, and optical signals in two directions are simultaneously transmitted and received by using one optical fiber, so that a single-fiber bidirectional transmission technology of the optical signals is realized; the work which can be completed by two optical fibers can be completed by only one optical fiber, the effect of doubling the transmission capacity is achieved on the basis of the existing optical fiber transmission technology, and optical fiber resources are greatly saved; in addition, the volume and the size of the whole structure are smaller, and the cost is lower.

Description

Technical Field

[0001] The utility model relates to an optical fiber transmission technology, in particular to a two-in-one multi-channel compact coarse wavelength division multiplexer. Background Art

[0002] Coarse wavelength division multiplexing (CWDM) is a combination of optical wavelengths that can be transmitted using a single optical fiber. It is a laser technology used to increase the bandwidth of existing optical fiber backbones, enabling optical fiber networks to transmit signals at multiple wavelengths simultaneously.

[0003] In CWDM system, multiplexer (Mux) and demultiplexer (Demux) are two indispensable components. Data from various sources are put on the optical fiber, where each signal propagates at the same speed with its own optical wavelength. Mux is a module on the transmitting end that gathers multiple data signals together for transmission through a single optical fiber, while Demux is a module on the receiving end that separates the gathered signals and delivers each channel to a fiber receiver.

[0004] In the traditional structure, Mux and Demux are independent modules, and the optical filter and fiber collimator are fixed on different substrates, which is large in size and requires more materials. Utility Model Content

[0005] The utility model aims to provide a two-in-one multi-channel compact coarse wavelength division multiplexer to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A two-in-one multi-channel compact coarse wavelength division multiplexer, comprising a combining module, the combining module being used to combine multiple data signals together for transmission through a single optical fiber;

[0008] It also includes a wavelength splitting module, which is used to separate mixed optical signals of different wavelengths and transmit them to corresponding split ends through each plurality of channels for output;

[0009] The wave combining module and the wave splitting module are integrated on the same substrate.

[0010] The two-in-one multi-channel compact coarse wavelength division multiplexer as described above: the combining module includes multiple groups of fiber collimators and multiple groups of optical filters, one of the multiple groups of fiber collimators serves as the common end of the combining module, and the remaining fiber collimators serve as branch ends of the combining module; the optical filters correspond one-to-one to the multiple groups of fiber collimators in the branch ends.

[0011] The two-in-one multi-channel compact coarse wavelength division multiplexer as described above: the wavelength division module also includes multiple groups of fiber collimators and multiple groups of optical filters, one of the multiple groups of fiber collimators serves as the common end of the wavelength division module, and the remaining fiber collimators serve as branch ends of the wavelength division module; the optical filters correspond one-to-one to the multiple groups of fiber collimators in the branch ends.

[0012] The two-in-one multi-channel compact coarse wavelength division multiplexer as described above: the optical filter is made of glass material, one end surface of the optical filter has a multi-layer coating, and the other end surface is coated with an anti-reflection film.

[0013] The two-in-one compact multi-channel coarse wavelength division multiplexer as described above: the substrate is made of metal or ceramic material that is a non-sensitive thermal expansion material.

[0014] Compared with the prior art, the beneficial effects of the utility model are: a single-fiber bidirectional coarse wavelength division multiplexing system is formed by integrating the wavelength combining module and the wavelength splitting module, and optical signals in two directions are transmitted and received simultaneously with one optical fiber, thereby realizing the single-fiber bidirectional transmission technology of optical signals; only one optical fiber is used to complete the work that can only be completed by two optical fibers, and on top of the existing optical fiber transmission technology, the transmission capacity is doubled, which greatly saves optical fiber resources; in addition, the overall structure has a smaller volume and size, and a lower cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a two-in-one multi-channel compact coarse wavelength division multiplexer.

[0016] Figure 2 The schematic diagram is a structural diagram of the wavelength division module in a two-in-one multi-channel compact coarse wavelength division multiplexer.

[0017] Figure 3 This is a schematic diagram of the structure of the multiplexing module in a two-in-one multi-channel compact coarse wavelength division multiplexer.

[0018] In the figure: 1-fiber collimator; 2-substrate; 3-optical filter. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0021] See also Figure 1 to Figure 3 As an embodiment of the utility model, the two-in-one multi-channel compact coarse wavelength division multiplexer includes an integrated wavelength combining module and a wavelength splitting module. Specifically, the wavelength combining module and the wavelength splitting module are integrated on the same substrate 2, with high integration and smaller size; thereby achieving the effect of reducing the volume and saving the substrate 2, simplifying the process flow and reducing costs.

[0022] The combiner module is used to gather multiple data signals together for transmission through a single optical fiber; optical signals of different wavelengths are input from the split ends of the combiner module and then gathered and output from the common end of the combiner module;

[0023] The splitter module is used to separate mixed optical signals of different wavelengths and transmit them to the corresponding split ends through multiple channels for output; the converged optical signals are input from the common end of the splitter module and then output from the split ends of the splitter module.

[0024] In this embodiment, the combining module and the splitting module are integrated to form a single-fiber bidirectional coarse wavelength division multiplexing system, which uses one optical fiber to simultaneously transmit and receive optical signals in two directions, thereby realizing a single-fiber bidirectional transmission technology of optical signals. Only one optical fiber is used to complete the work that can only be completed by two optical fibers. On top of the existing optical fiber transmission technology, it has the effect of doubling the transmission capacity, greatly saving optical fiber resources. In addition, the overall structure has a smaller volume and size, and a lower cost.

[0025] As a further solution of the utility model, the combining module includes multiple groups of fiber collimators 1 and multiple groups of optical filters 3, one of the multiple groups of fiber collimators 1 serves as a common end of the combining module, and the remaining fiber collimators 1 serve as branch ends of the combining module; the optical filters 3 correspond one-to-one to the multiple groups of fiber collimators 1 in the branch ends.

[0026] In this embodiment, dispersed optical signals of different wavelengths are input from the multiple-division end of the multiplexing module, and after interference through the optical filter 3, they are converged at the common end of the multiplexing module and output together.

[0027] As a further solution of the utility model, the wavelength splitting module also includes multiple groups of fiber collimators 1 and multiple groups of optical filters 3, one of the multiple groups of fiber collimators 1 serves as a common end of the wavelength splitting module, and the remaining fiber collimators 1 serve as branch ends of the wavelength splitting module; the optical filters 3 correspond one-to-one to the multiple groups of fiber collimators 1 in the branch ends.

[0028] In this embodiment, optical signals of different wavelengths converged together are input from the common end of the demultiplexing module, and after interference through the optical filter 3, are output from the multiple demultiplexing ends of the demultiplexing module.

[0029] As a further solution of the present invention, the optical filter 3 is made of glass material, one end surface of which has a multi-layer coating, and the other end surface is coated with an anti-reflection film.

[0030] In this embodiment, the type and thickness of the multi-layer coating are determined according to specific parameters. The type and thickness of these coatings determine which wavelengths of light will undergo destructive interference and be prevented from passing through, and which wavelengths of light will pass through; and the anti-reflection film coated on the other end is mainly to reduce the attenuation of the optical signal.

[0031] As a further solution of the present invention, the substrate 2 is made of a non-sensitive thermal expansion material. Because the thermal expansion coefficient of the substrate 2 is small, the amount of deformation generated when the optical signal converges is extremely small. Preferably, the substrate 2 is made of metal or ceramic material.

[0032] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0033] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A two-in-one multi-channel compact coarse wavelength division multiplexer, comprising a wavelength combining module and a wavelength demultiplexing module, characterized in that: The combining module is used to combine multiple data signals together for transmission through a single optical fiber; The wavelength splitting module is used to separate mixed optical signals of different wavelengths and transmit them to corresponding split ends for output through multiple channels; The wave combining module and the wave splitting module are integrated on the same substrate (2).

2. The two-in-one multi-channel compact coarse wavelength division multiplexer according to claim 1, characterized in that: The wave combining module comprises a plurality of groups of optical fiber collimators (1) and a plurality of groups of optical filters (3); one of the plurality of groups of optical fiber collimators (1) serves as a common end of the wave combining module, and the remaining optical fiber collimators (1) serve as branch ends of the wave combining module; the optical filters (3) correspond one to one with the plurality of groups of optical fiber collimators (1) in the branch ends.

3. The two-in-one multi-channel compact coarse wavelength division multiplexer according to claim 2, characterized in that: The wavelength splitting module also comprises a plurality of groups of optical fiber collimators (1) and a plurality of groups of optical filters (3); one of the plurality of groups of optical fiber collimators (1) serves as a common end of the wavelength splitting module, and the remaining optical fiber collimators (1) serve as branch ends of the wavelength splitting module; the optical filters (3) correspond one-to-one to the plurality of groups of optical fiber collimators (1) in the branch ends.

4. The two-in-one multi-channel compact coarse wavelength division multiplexer according to claim 3, characterized in that: The optical filter (3) is made of glass.

5. The two-in-one multi-channel compact coarse wavelength division multiplexer according to claim 4, characterized in that: One end surface of the optical filter (3) has a multi-layer coating.

6. The two-in-one multi-channel compact coarse wavelength division multiplexer according to claim 4, characterized in that: The other end surface of the optical filter (3) is coated with an anti-reflection film.

7. The two-in-one multi-channel compact coarse wavelength division multiplexer according to claim 1, characterized in that: The substrate (2) is made of a non-heat-sensitive material.

8. The two-in-one multi-channel compact coarse wavelength division multiplexer according to claim 7, characterized in that: The substrate (2) is made of metal or ceramic material.

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