Mini multichannel wavelength division multiplexer

Abstract

A mini multichannel wavelength division multiplexer comprises a base plate, a first prism, a second prism, a plurality of filters, a first optical fiber collimator and a plurality of second optical fiber collimators. The first prism is fixedly connected to the right front portion of the bottom end of the second prism, the top ends of the filters are fixedly connected to the front side and the rear side of the bottom end of the second prism, the middle of the bottom end of the second prism is fixedly connected to the top end of the bottom plate, the top end of the bottom plate is a bevel edge, and the first optical fiber collimator is arranged in front of the bottom plate and aligned with the first prism. And the plurality of second optical fiber collimators are arranged on the front and back surfaces of the bottom plate and are aligned with the plurality of filters one by one. According to the miniature multichannel wavelength division multiplexer, the size of the wavelength division multiplexer is reduced, the temperature stability of the wavelength division multiplexer is improved, and the production efficiency of the wavelength division multiplexer is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical communication, in particular to a mini multi-channel wavelength division multiplexer. Background Art

[0002] In the optical fiber communication network, in order to improve the communication capacity, two or more wavelengths are needed as the transmission and reception signals, which requires the use of multi-channel wavelength division multiplexing devices. The traditional multi-channel wavelength division multiplexer is a single-channel three-port wavelength division multiplexing device that realizes the separation and combination of optical signals of multiple wavelengths by cascading. Its disadvantages are large size, large series loss, and not easy to install in a small space. Later, a compact coarse wavelength division multiplexing device appeared, which integrated all filters of different wavelengths on a base plate, and the reflected light of each filter entered the incident light of the next filter, saving the fiber collimator required for the incident, and the light filtered by each filter was received by a fiber collimator, realizing the miniaturization of the device. But it still has disadvantages. The first disadvantage is that the volume is not small enough. The continuous reflection of light will cause the fiber collimator to be symmetrically distributed, which means that the optical fiber will be output in two opposite directions, and the base plate that carries the optical components needs to be long enough. The second disadvantage is the temperature-related loss difference. Since the base plate is large and the optical path is long, even if the light input end produces a small deformation, the light will deviate at a larger angle when it reaches the last channel, resulting in a coupling mismatch of the fiber collimator and a larger optical insertion loss, which is especially serious when the temperature changes. Summary of the invention

[0003] In order to solve the above problems, the utility model provides a mini multi-channel wavelength division multiplexer.

[0004] To achieve the purpose of the utility model, the utility model provides a mini multi-channel wavelength division multiplexer, comprising:

[0005] A base plate, a first prism, a second prism, a plurality of filters, a first optical fiber collimator, and a plurality of second optical fiber collimators;

[0006] The first prism is fixedly connected to the right front of the bottom end of the second prism, the top ends of the multiple filters are fixedly connected to the front and rear sides of the bottom end of the second prism, the middle of the bottom end of the second prism is fixedly connected to the top end of the bottom plate, the top end of the bottom plate is a hypotenuse, the first fiber optic collimator is arranged in front of the bottom plate, the first fiber optic collimator is aligned with the first prism, and the multiple second fiber optic collimators are arranged on the front and rear surfaces of the bottom plate, and the multiple second fiber optic collimators are aligned one by one with the multiple filters.

[0007] Furthermore, the first prism is used to deflect light.

[0008] Furthermore, the second prism is used to fold back the light.

[0009] Optionally, the first fiber optic collimator is used to input light, and the second fiber optic collimator is used to output light.

[0010] Optionally, the first fiber optic collimator is used to output light, and the second fiber optic collimator is used to input light.

[0011] Furthermore, the plurality of filters and the first prism are fixedly connected to the bottom end of the second prism by gluing.

[0012] Particularly, the second prism is fixedly connected to the base plate by gluing.

[0013] Furthermore, the working distances of the plurality of second optical fiber collimators are different.

[0014] Furthermore, the filtering wavelengths of the multiple filters are different.

[0015] Optionally, the number of the second optical fiber collimators is twelve.

[0016] The beneficial effect of the utility model is that the mini multi-channel wavelength division multiplexer of the utility model integrates all optical components on a base plate, and the optical paths are interconnected on both sides of the base plate, thereby reducing the volume of the wavelength division multiplexer and improving the temperature stability of the wavelength division multiplexer. With the assistance of a tooling fixture, the filter can be quickly assembled, thereby improving the production efficiency of the wavelength division multiplexer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shown is a structural diagram of a mini multi-channel wavelength division multiplexer of the present application;

[0018] Figure 2 Shown are the side view and bottom view of the filter, the first prism and the second prism of the wavelength division multiplexer of the present application after being assembled;

[0019] Figure 3 Shown are the side view and front view of the assembled bottom plate of the wavelength division multiplexer of the present application;

[0020] Figure 4 Shown are the side view and front view of the assembled first optical fiber collimator of the wavelength division multiplexer of the present application;

[0021] Figure 5 Shown are the side view and front view of the assembled second optical fiber collimator of the wavelength division multiplexer of the present application.

[0022] Figure numerals: 1. first optical fiber collimator; 2. filter; 3. first prism; 4. second prism; 5. bottom plate; 6. second optical fiber collimator. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] According to the first aspect of the utility model, Figure 1 As shown, a mini multi-channel wavelength division multiplexer is provided, comprising:

[0025] A base plate 5, a first prism 3, a second prism 4, a plurality of filters 2, a first optical fiber collimator 1 and a plurality of second optical fiber collimators 6;

[0026] The first prism 3 is fixedly connected to the right front of the bottom end of the second prism 4, the top ends of the multiple filters 2 are fixedly connected to the front and rear sides of the bottom end of the second prism 4, the middle part of the bottom end of the second prism 4 is fixedly connected to the top end of the bottom plate 5, the top end of the bottom plate 5 is a hypotenuse, the first fiber optic collimator 1 is arranged in front of the bottom plate 5, the first fiber optic collimator 1 is aligned with the first prism 3, and the multiple second fiber optic collimators 6 are arranged on the front and rear surfaces of the bottom plate 5, and the multiple second fiber optic collimators 6 are aligned one by one with the multiple filters 2.

[0027] A mini multi-channel wavelength division multiplexer includes a bottom plate 5, a first prism 3, a second prism 4, a plurality of filters 2, a first fiber collimator 1, and a plurality of second fiber collimators 6; the first prism 3 is fixedly connected to the right front of the bottom end of the second prism 4, and is generally used to deflect the input light directly incident into the first prism 3 into the second prism 4 to obtain a certain incident angle, so as to facilitate the subsequent multiple reversals of the second prism 4. The top ends of the plurality of filters 2 are fixedly connected to the front and rear sides of the bottom end of the second prism 4. Since the input light has a certain angle after being deflected, the input light not only reversibly returns between the upper and lower surfaces of the second prism 4 in the vertical direction, but also moves forward in the horizontal direction, so as to be received by the plurality of filters 2 distributed on the front and rear sides. After being filtered by the filters 2, the light of a specific wavelength passes through the filters 2, and the rest of the light continues to be reversibly forward in the second prism 4. The middle part of the bottom end of the second prism 4 is fixedly connected to the top of the bottom plate 5, so that the second prism 4 is equivalent to being connected across the front and back surfaces of the bottom plate 5, playing the role of a bridge for light transmission, so that the input light can be transmitted between the filters distributed on the front and back surfaces, and the light path is interconnected on both sides of the bottom plate 5, and then the filter completes the filtering function. The top of the bottom plate 5 is a hypotenuse. Since the wavelengths of the light after filtering are different, the working distances to the fiber collimator are also different, so the top of the bottom plate 5 is designed as a hypotenuse, so that the fiber collimator on the light path can obtain different working distances. The first fiber collimator 1 is set in front of the bottom plate 5, and the first fiber collimator 1 is aligned with the first prism 3. The first fiber collimator 1 is used to collimate the light entering the first prism 3 or the output of the first prism 3. A plurality of second optical fiber collimators 6 are arranged on the front and rear surfaces of the base plate 5. The plurality of second optical fiber collimators 6 are aligned one by one with the plurality of filters 2. The second optical fiber collimators 6 are used to collimate the light filtered by the corresponding filters 2 or input into the corresponding filters 2. Due to the aforementioned specially designed optical path, the plurality of second optical fiber collimators 6 can be staggeredly arranged on the front and rear surfaces of the base plate 5, thereby saving the area of ​​the base plate 5, reducing the volume of the multi-channel wavelength division multiplexer, and improving the temperature stability of the wavelength division multiplexer.

[0028] Furthermore, the first prism 3 is used to deflect light.

[0029] The first prism 3 is used to deflect the light, and to change the propagation direction of the light, so as to meet the incident angle requirement of the filter 2 .

[0030] Furthermore, the second prism 4 is used to fold back the light.

[0031] The second prism 4 is used to fold back the light, and is used to continuously reflect the light back and forth to the front and back optical planes of the bottom plate 5, so as to ensure that the optical fiber collimator receiving the light always outputs the fiber in the same direction at the same end.

[0032] Optionally, the first optical fiber collimator 1 is used to input light, and the second optical fiber collimator 6 is used to output light.

[0033] The first fiber collimator 1 is used to input light, and the second fiber collimator 6 is used to output light. At this time, the multi-channel wavelength division multiplexer is used to split the wavelengths, separating the input light through the first fiber collimator 1 into multiple output lights through the second fiber collimator 6.

[0034] Optionally, the first optical fiber collimator 1 is used to output light, and the second optical fiber collimator 6 is used to input light.

[0035] The first fiber collimator 1 is used to output light, and the second fiber collimator 6 is used to input light. At this time, the multi-channel wavelength division multiplexer is used to combine multiple input light rays passing through the second fiber collimator 6 into output light rays passing through the first fiber collimator 1.

[0036] Furthermore, the plurality of filters 2 and the first prism 3 are fixedly connected to the bottom end of the second prism 4 by gluing.

[0037] The multiple filters 2 and the first prism 3 are fixedly connected to the bottom end of the second prism 4 by gluing. Gluing is a common assembly method for optical devices and can maintain the stability of the optical path.

[0038] Particularly, the second prism 4 is fixedly connected to the bottom plate 5 by gluing.

[0039] The second prism 4 is fixedly connected to the base plate 5 by gluing. Gluing is a common assembly method for optical devices and can maintain the stability of the optical path.

[0040] Furthermore, the working distances of the plurality of second optical fiber collimators 6 are different.

[0041] The plurality of second optical fiber collimators 6 have different working distances and are used to separate or input light of different wavelengths.

[0042] Furthermore, the filtering wavelengths of the multiple filters 2 are different.

[0043] The filtering wavelengths of the multiple filters 2 are different, so light with a specific wavelength can be separated, or a group of light with a specific wavelength can be combined.

[0044] Optionally, the number of the second optical fiber collimators 6 is twelve.

[0045] The number of the second fiber collimators 6 is 12. Theoretically, if the base plate 5 is large enough and the fiber propagation loss is small enough, there can be an infinite number of second fiber collimators 6. Due to the constraints of the actual environment, the value interval of the second fiber collimators 6 is [1, 1024], preferably 12.

[0046] According to the second aspect of the utility model, Figure 2-Figure 5As shown, a method for preparing a mini multi-channel wavelength division multiplexer comprises:

[0047] Step S1, first assemble all filters 2 for filtering different wavelengths and the first prism 3 to the bottom end of the second prism 4 according to a certain installation position sequence to form a patch optical component.

[0048] Step S2, then assembling the patch optical component onto the oblique end side of the base plate 5.

[0049] Step S3, finally all the collimators are assembled and fixed on the bottom plate 5 to complete the entire mini multi-channel wavelength division multiplexing device;

[0050] Wherein, step S3 further comprises:

[0051] The first step is to install the first collimator, which is located below the second prism 4. The precise position of the first collimator is determined by monitoring the center wavelength of the emission spectrum of all filters 2 and the minimum insertion loss;

[0052] In the second step, all the light emitted from the filters 2 are received by a corresponding second collimator and fixed one by one on the bottom plate 5 .

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] In the description of the present invention, it should be understood that the terms "top", "bottom", "upper", "lower" (if any), etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0055] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0056] The terms "first" and "second" in the specification and claims of the present application and the above-mentioned figure descriptions are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A mini multi-channel wavelength division multiplexer, characterized in that: include: A base plate (5), a first prism (3), a second prism (4), a plurality of filters (2), a first optical fiber collimator (1), and a plurality of second optical fiber collimators (6); The first prism (3) is fixedly connected to the right front of the bottom end of the second prism (4); the top ends of the plurality of filters (2) are fixedly connected to the front and rear sides of the bottom end of the second prism (4); the middle of the bottom end of the second prism (4) is fixedly connected to the top end of a bottom plate (5); the top end of the bottom plate (5) is a hypotenuse; the first optical fiber collimator (1) is arranged in front of the bottom plate (5); the first optical fiber collimator (1) is aligned with the first prism (3); the plurality of second optical fiber collimators (6) are arranged on the front and rear sides of the bottom plate (5); the plurality of second optical fiber collimators (6) are aligned one by one with the plurality of filters (2).

2. The mini multi-channel wavelength division multiplexer according to claim 1, characterized in that: The first prism (3) is used to deflect light.

3. The mini multi-channel wavelength division multiplexer according to claim 1, characterized in that: The second prism (4) is used to fold back light.

4. The mini multi-channel wavelength division multiplexer according to claim 1, characterized in that: The first optical fiber collimator (1) is used for inputting light, and the second optical fiber collimator (6) is used for outputting light.

5. The mini multi-channel wavelength division multiplexer according to claim 1, characterized in that: The first optical fiber collimator (1) is used for outputting light, and the second optical fiber collimator (6) is used for inputting light.

6. The mini multi-channel wavelength division multiplexer according to claim 1, characterized in that: The plurality of filters (2) and the first prism (3) are fixedly connected to the bottom end of the second prism (4) by gluing.

7. The mini multi-channel wavelength division multiplexer according to claim 1, characterized in that: The second prism (4) is fixedly connected to the base plate (5) by gluing.

8. The mini multi-channel wavelength division multiplexer according to claim 1, characterized in that: The working distances of the plurality of second optical fiber collimators (6) are different.

9. The mini multi-channel wavelength division multiplexer according to claim 1, characterized in that: The filtering wavelengths of the multiple filters (2) are different.

10. The mini multi-channel wavelength division multiplexer according to claim 1, characterized in that: The number of the second optical fiber collimators (6) is 12.

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