CN114966986A - Method and system for coupling wavelength division multiplexing components - Google Patents
Method and system for coupling wavelength division multiplexing components Download PDFInfo
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- CN114966986A CN114966986A CN202210640746.3A CN202210640746A CN114966986A CN 114966986 A CN114966986 A CN 114966986A CN 202210640746 A CN202210640746 A CN 202210640746A CN 114966986 A CN114966986 A CN 114966986A
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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
- G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
Abstract
The application provides a method and a system for coupling wavelength division multiplexing components, comprising the following steps: setting a light receiving surface of the optical fiber array at a preset focal length position of an array lens of the wavelength division multiplexing component to be coupled; clamping an optical port lens by an equipment chuck for adjustment, so that the multi-path optical power received by the optical fiber array meets a preset value, and the optical port lens is in a state of being clamped by the equipment chuck after the adjustment; clamping the array lens and the optical port lens by an equipment chuck, and simultaneously and finely adjusting the array lens and the optical port lens in the horizontal axial direction and the vertical axial direction respectively so as to enable the approximate optical path position to be aligned to the light receiving surface of the optical fiber array in the horizontal direction and the vertical direction; finely adjusting the optical port lens and the array lens in the axial direction of the focal length of the optical path to minimize the area of a light spot received by a light receiving surface of the optical fiber array and obtain the hovering positions of the optical port lens and the array lens; and fixing the optical port lens and the array lens to the wavelength division multiplexing component to be coupled according to the hovering position. The speed of coupling is guaranteed.
Description
Technical Field
The present application relates to the field of optics, and more particularly, to methods and systems for wavelength division multiplexing based component coupling.
Background
In order to improve the production efficiency, the wavelength division multiplexing optical path elements are integrated and installed to form a wavelength division multiplexing assembly, and the wavelength division multiplexing assembly comprises an optical port adapter, a wavelength division multiplexing assembly shell, an optical port lens, a wavelength division multiplexing element, an array lens and the like. At present, when the wavelength division multiplexing component is produced, a common coupling method comprises the following steps: welding an optical port adapter on a wavelength division multiplexing component shell by a laser welding machine, then mounting and fixing a wavelength division multiplexing element on the wavelength division multiplexing component shell in a high-precision passive mounting mode, and coupling and fixing an optical port lens in an active mode, wherein the specific method is that a light source is input through an adapter port, and the position of the optical port lens is adjusted, so that the parameters of multiple paths of light beams after demultiplexing the wavelength division multiplexing element meet the requirements, for example, the power of multiple paths of light meets a first preset target value; and then the array lens is coupled in an active mode, so that the multi-path optical power conforms to a second preset target value.
When the optical port lens is coupled separately in this way, the rear end of the wavelength division multiplexing element is an array lens which is not yet arranged, and then the optical power detection device detects the multipath parallel light obtained by demultiplexing the wavelength division multiplexing element, and because the light spot of the parallel light is large, the optical power detection device actually receives only a small part of light, even if the measured optical power reaches a set value, the multipath parallel light path may not be completely aligned with the detection device actually, that is, the parallel light path may have a certain deviation from the target light path, that is, when the optical port lens is coupled separately in this way, the position of the optical port lens which can be obtained is not necessarily the optimal coupling position. Then, on the premise that the position of the optical port lens is not in the optimal coupling position, the position of the array lens is coupled independently, even if the coupling efficiency meets the requirement and the coupling power meets the use requirement, the optimal coupling effect is not achieved actually.
Disclosure of Invention
The embodiments of the present invention mainly aim to provide a method and a system for coupling wavelength division multiplexing components, so that the synchronization adjustment of an optical port lens and an array lens is performed in the horizontal axial direction and the vertical axial direction, respectively, thereby ensuring the accuracy of fine adjustment, and simultaneously, a rough optical path is coupled to an optical fiber array in advance, thereby ensuring the coupling speed.
In a first aspect, a method for coupling wavelength division multiplexing components is provided, the method comprising:
arranging a light receiving surface of the optical fiber array at a preset focal length position of an array lens of a wavelength division multiplexing component to be coupled, which comprises an optical port adapter, a wavelength division multiplexing component shell and a wavelength division multiplexing element;
clamping an optical port lens by an equipment chuck for adjustment, so that the multipath optical power received by an optical fiber array arranged at the rear end of the adjusted wavelength division multiplexing assembly to be coupled, which comprises an optical port adapter, a wavelength division multiplexing assembly shell and a wavelength division multiplexing element, meets a preset value, and the optical port lens is in a state of being clamped by the equipment chuck after the adjustment;
clamping the array lens and the optical port lens by an equipment chuck, and simultaneously performing first fine adjustment in the horizontal axial direction and the vertical axial direction respectively, so that multi-path light received by an optical fiber array at the rear end of a wavelength division multiplexing component to be coupled, which comprises an optical port adapter, a wavelength division multiplexing component shell and a wavelength division multiplexing element, is aligned to the light receiving surface of the optical fiber array in the horizontal direction and the vertical direction;
a second fine adjustment is carried out on the optical port lens and the array lens in the same direction but different steps in the axial direction of the focal length of the optical path, so that the area of a light spot received by a light receiving surface of an optical fiber array arranged at the rear end of a wavelength division multiplexing component to be coupled, which comprises an optical port adapter, a wavelength division multiplexing component shell and a wavelength division multiplexing element, is the minimum, and the positions of the optical port lens and the array lens are obtained;
and fixing the optical port lens and the array lens to a wavelength division multiplexing component to be coupled, which comprises an optical port adapter, a wavelength division multiplexing component shell and a wavelength division multiplexing element, according to the positions.
In one possible implementation, after the fine tuning the optical port lens and the array lens in the same direction but different steps in the optical path focal length axial direction at the same time, the method further includes:
and obtaining the optical power of the multipath light received by the optical fiber array, and if the optical power is lower than a preset optical power threshold, finely adjusting the horizontal angle of the optical port lens by a preset adjustment amplitude until the optical power is larger than the optical power threshold.
In another possible implementation manner, the setting the light receiving surface of the optical fiber array at a preset focal length position of an array lens of a wavelength division multiplexing assembly to be coupled, which includes the optical port adapter, the wavelength division multiplexing assembly housing, and the wavelength division multiplexing element, includes:
obtaining the preset distance L between the array lens and the wavelength division multiplexing component shell 1 The focal length of the array lens is F 1 ；
Observing and positioning through a visual recognition device, arranging a light receiving surface of the optical fiber array at a preset focal length position of the array lens, wherein the preset focal length position of the array lens is L away from the wavelength division multiplexing component shell 2 ＝F 1 -L 1 The position of (a).
In another possible implementation manner, the setting the light receiving surface of the optical fiber array at a preset focal length position of an array lens of a wavelength division multiplexing assembly to be coupled, which includes the optical port adapter, the wavelength division multiplexing assembly housing, and the wavelength division multiplexing element, includes:
receiving multipath light emitted by a standard wavelength division multiplexing component through the optical fiber array, and acquiring the optical power of the multipath light irradiated on the optical fiber array;
adjusting the position of the optical fiber array to make the optical power received by the optical fiber array meet the standard optical power, and recording the position of the optical fiber array at the moment as the standard position;
recording the standard position as the focal length position.
In another possible implementation manner, the fine tuning of the optical port lens and the array lens in the same direction but different steps in the optical path focal length axial direction at the same time includes:
the incident focal length of the optical port lens is F 0 The preset distance between the optical port lens and the array lens is F 3 Focal length of the array lens is F 1 When the optical port lens is stepped by S 4 The theoretical best matching distance between the optical port lens and the array lens during movement is (S) 4 *F 3 )/F 0 The optical aperture lens is stepped to S 4 While the array lens corresponds to the best matching step S 5 Is set to [ (S) 4 *F 3 )/F 0 ]*(F 1 /F 3 )＝(S 4 *F 1 )/F 0 。
In a second aspect, a system for wavelength division multiplexing component coupling is provided, the system comprising:
the focal length position setting module is used for setting a light receiving surface of the optical fiber array at a focal length position preset by an array lens of a wavelength division multiplexing component to be coupled, wherein the array lens comprises an optical port adapter, a wavelength division multiplexing component shell and a wavelength division multiplexing element;
the adjusting module is used for clamping the optical port lens through the equipment chuck for adjusting, so that the multi-path optical power received by the optical fiber array arranged at the rear end of the to-be-coupled wavelength division multiplexing assembly which comprises the optical port adapter, the wavelength division multiplexing assembly shell and the wavelength division multiplexing element and is adjusted accords with a preset value, and the optical port lens is in a state of being clamped by the equipment chuck after being adjusted;
the horizontal and vertical fine adjustment module is used for clamping the array lens and the optical port lens by an equipment chuck and simultaneously performing first fine adjustment in the horizontal axial direction and the vertical axial direction respectively so that multi-path light received by an optical fiber array at the rear end of a wavelength division multiplexing component to be coupled, which comprises an optical port adapter, a wavelength division multiplexing component shell and a wavelength division multiplexing element, is aligned to the light receiving surface of the optical fiber array in the horizontal direction and the vertical direction;
the different stepping fine adjustment module is used for performing second fine adjustment on the optical port lens and the array lens in the same direction but different steps in the axial direction of the focal length of the optical path, so that the area of a light spot received by a light receiving surface of an optical fiber array which is arranged at the rear end of the wavelength division multiplexing component to be coupled and comprises an optical port adapter, a wavelength division multiplexing component shell and a wavelength division multiplexing element is minimum, and the positions of the optical port lens and the array lens are obtained;
and the fixing module is used for simultaneously carrying out second fine adjustment on the optical port lens and the array lens in the same direction but different steps in the axial direction of the focal length of the optical path, so that the area of a light spot received by a light receiving surface of the optical fiber array at the rear end of the wavelength division multiplexing component to be coupled, which comprises the optical port adapter, the wavelength division multiplexing component shell and the wavelength division multiplexing element, is the minimum through the second fine adjustment, and the positions of the optical port lens and the array lens are obtained.
In one possible implementation, the system further includes:
and the horizontal angle fine-tuning module is used for acquiring the optical power of the multipath light received by the optical fiber array, and if the optical power is lower than a preset optical power threshold, fine-tuning the horizontal angle of the optical port lens by a preset tuning range until the optical power is larger than the optical power threshold.
In another possible implementation manner, the focal position setting module includes:
a distance obtaining unit for obtaining the preset distance L between the array lens and the wavelength division multiplexing component shell 1 The focal length of the array lens is F 1 ；
A focal length position setting unit for observing and positioning through the visual recognition device, and setting the light receiving surface of the optical fiber array at the preset focal length position of the array lens, wherein the preset focal length position of the array lens is L away from the wavelength division multiplexing component shell 2 ＝F 1 -L 1 The position of (a).
In another possible implementation manner, the focal position setting module includes:
the optical power acquisition unit is used for receiving the multipath light emitted by the standard wavelength division multiplexing component through the optical fiber array and acquiring the optical power of the multipath light irradiated on the optical fiber array;
the standard position recording unit is used for adjusting the position of the optical fiber array, so that the optical power received by the optical fiber array meets the standard optical power, and recording the position of the optical fiber array at the moment as the standard position;
a focal length position recording unit for recording the standard position as the focal length position.
In another possible implementation manner, the fine tuning of the optical port lens and the array lens in the same direction but different steps in the optical path focal length axial direction at the same time includes:
the incident focal length of the optical port lens is F 0 The preset distance between the optical port lens and the array lens is F 3 Focal length of the array lens is F 1 When the optical port lens is stepped by S 4 The theoretical best matching distance between the optical port lens and the array lens during movement is (S) 4 *F 3 )/F 0 The optical aperture lens is stepped to S 4 While the array lens corresponds to the best matching step S 5 Is set to [ (S) 4 *F 3 )/F 0 ]*(F 1 /F 3 )＝(S 4 *F 1 )/F 0 。
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments of the present application will be briefly described below.
Fig. 1 is a flow chart of a method for coupling wavelength division multiplexing components according to an embodiment of the present invention;
fig. 2 is a flow chart of a method for coupling wavelength division multiplexing components according to another embodiment of the present invention;
FIG. 3 is a flow chart of a method for coupling wavelength division multiplexing components according to yet another embodiment of the present invention;
FIG. 4 is a flow chart of a method for coupling wavelength division multiplexing components according to yet another embodiment of the present invention;
FIG. 5 is a block diagram of a system in which wavelength division multiplexing components are coupled according to one embodiment of the present invention;
FIG. 6 is a block diagram of a system in which wavelength division multiplexing components are coupled according to another embodiment of the present invention;
FIG. 7 is a block diagram of a system in which wavelength division multiplexing components are coupled according to yet another embodiment of the present invention;
fig. 8 is a block diagram of a system for coupling wavelength division multiplexing components according to still another embodiment of the present invention.
Detailed description of the invention
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar modules or modules having the same or similar functionality throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, modules, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, modules, components, and/or groups thereof. It will be understood that when a module is referred to as being "connected" or "coupled" to another module, it can be directly connected or coupled to the other module or intervening modules may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any module and all combinations of one or more of the associated listed items.
In order to make the objects, technical solutions and advantages of the present application more clear, the following detailed description of the implementation of the present application will be made with reference to the accompanying drawings.
The technical solutions of the present application and the technical solutions of the present application, for example, to solve the above technical problems, will be described in detail with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.
Fig. 1 is a flowchart of a method for coupling wavelength division multiplexing components according to an embodiment of the present invention, where the method includes:
101, arranging a light receiving surface of an optical fiber array at a preset focal position of an array lens of a wavelength division multiplexing component to be coupled, which comprises an optical port adapter, a wavelength division multiplexing component shell and a wavelength division multiplexing element;
102, clamping an optical port lens by an equipment chuck for adjustment, so that the multi-path optical power received by an optical fiber array arranged at the rear end of the adjusted wavelength division multiplexing assembly to be coupled, which comprises an optical port adapter, a wavelength division multiplexing assembly shell and a wavelength division multiplexing element, meets a preset value, and the optical port lens is in a state of being clamped by the equipment chuck after the adjustment;
103, clamping the array lens and the optical port lens by an equipment chuck, and simultaneously performing first fine adjustment in the horizontal axial direction and the vertical axial direction respectively, so that multi-path light received by an optical fiber array at the rear end of a wavelength division multiplexing component to be coupled, which comprises an optical port adapter, a wavelength division multiplexing component shell and a wavelength division multiplexing element, by the first fine adjustment is aligned to the light receiving surface of the optical fiber array in the horizontal direction and the vertical direction;
and 105, fixing the optical port lens and the array lens to a wavelength division multiplexing component to be coupled, which comprises an optical port adapter, a wavelength division multiplexing component shell and a wavelength division multiplexing element, according to the positions.
In the embodiment of the invention, the array lens is an element in the wavelength division multiplexing assembly, and the function of the array lens is to converge parallel light formed by processing of other elements in the wavelength division multiplexing assembly to the light receiving chip, or collimate light emitted by the light emitting chip into parallel light. When the wavelength division multiplexing component is coupled, the placement position of the array lens needs to be set according to the light path requirement, so that the light emitted by the array lens is converged at the focal length position of the array lens, and whether the light is converged at the focal length position needs to be presented through the light receiving surface of an optical fiber array, therefore, an optical fiber array needs to be set, and the light receiving surface of the optical fiber array is located at the preset focal length position of the array lens.
The optical port lens is clamped by the equipment chuck for adjustment, so that the optical power of the multi-path light irradiated on the optical fiber array meets a preset power value after the coupling light source passes through the optical port adapter, the optical port lens and the wavelength division multiplexing element. Wherein, the preset power value is as follows: when the power of the coupling light source is 0dbm, the optical power of the multipath light is-30 dbm to-20 dbm. It is noted that after this adjustment is completed, the port lens is still in a state of being held by the device chuck.
After the adjustment is completed, the array lens and the optical port lens are clamped by the equipment chuck to simultaneously perform first fine adjustment in the horizontal axial direction and the vertical axial direction respectively, so that the multipath light irradiated on the optical fiber array is aligned to the light receiving surface of the optical fiber array after the coupling light source passes through the optical port adapter, the optical port lens, the array lens and the wavelength division multiplexing element. The standard of aligning the light receiving surfaces of the optical fiber array is as follows: when the power of the coupling light source is 0dbm, the optical power of the multipath light received by the optical fiber array is-15 dbm to-10 dbm.
Fine tuning the aperture lens in the same direction at different steps along the optical path focal length axis (step S) 4 ) And an array lens (step S) 5 <S 4 ) The light spot received by the light receiving surface of the optical fiber array is minimized, that is, the light spot is at the optimal focal length position (for example, under the condition that the provided coupling light source is 0dbm, the multipath optical power received by the optical fiber array all meets-2 to-1 dbm); preferably, the incident focal length of the optical port lens is assumed to be F 0 The preset distance between the optical port lens and the array lens is F 3 Focal length of the array lens is F 1 (ii) a When the optical port lens is stepped by S 4 When moving, the theoretical optimal matching distance between the optical port lens and the array lens is (S) 4 *F 3 )/F 0 I.e. the aperture lens is stepped by S 4 While the array lens corresponds to the best matching step S 5 Can be set as (S) 4 *F 3 )/F 0 ]*(F 1 /F 3 )＝(S 4 *F 1 )/F 0 。
In the embodiment of the present invention, a light receiving surface of an optical fiber array is disposed at a preset focal length position of an array lens of a wavelength division multiplexing component to be coupled, where the wavelength division multiplexing component to be coupled includes: the optical interface adapter, the wavelength division multiplexing assembly shell and the wavelength division multiplexing element; adjusting the optical port lens to enable the multi-path optical power received by the optical fiber array to accord with a preset value, so as to obtain the approximate optical path position of the wavelength division multiplexing component to be coupled; and finely adjusting the optical port lens and the array lens respectively and simultaneously in the horizontal axial direction and the vertical axial direction, and finely adjusting the optical port lens and the array lens in the same direction in different steps in the optical path focal length axial direction so as to minimize the area of the light spot received by the light receiving surface of the optical fiber array. The optical power of the multiple paths of light irradiated on the optical fiber array meets the preset value through coarse coupling, the requirements for the space between the multiple paths of light paths after demultiplexing by the wavelength division multiplexing element and the size of the multiple paths of light power are met preliminarily guaranteed, the optical port lens and the array lens are trimmed in the horizontal direction and the vertical direction synchronously in the follow-up process, the difficulty of synchronous trimming can be reduced, the accuracy of synchronous trimming can be improved, and the coupling efficiency is further improved. The optical port lens and the array lens are adjusted in the horizontal axial direction and the vertical axial direction simultaneously and synchronously, fine adjustment accuracy is guaranteed, and coupling speed is guaranteed.
As an alternative embodiment of the present invention, after the optical path focal length is adjusted to the optical port lens and the array lens in the same direction but different steps, the method further includes:
and obtaining the optical power of the multipath light received by the optical fiber array, and if the optical power is lower than a preset optical power threshold, finely adjusting the horizontal angle of the optical port lens by a preset adjustment amplitude until the optical power is larger than the optical power threshold.
In the embodiment of the invention, the wavelength division multiplexing component may cause the optical power to be lower than the optical power threshold value due to the deviation of the optical path caused by the production tolerance or the mounting deviation during the production or assembly. Therefore, it is necessary to adjust the horizontal angle of the optical port lens in the horizontal direction according to the preset adjustment range until the optical power is greater than the optical power threshold. Through angle regulation, certain correction can be carried out to the light path of skew to promote coupling efficiency. The optical power threshold and the adjustment amplitude can be set according to actual use requirements, which is not limited in the present application. Preferably, when the coupled light source is provided at 0dbm, the optical power threshold is in the range of-2 to-1 dbm, and the adjustment amplitude is 0.1 °.
Fig. 2 is a flowchart of a wavelength division multiplexing module coupling method according to still another embodiment of the present invention, where the disposing a light receiving surface of an optical fiber array at a preset focal position of an array lens of a wavelength division multiplexing module to be coupled, the array lens including an optical port adapter, a wavelength division multiplexing module housing, and a wavelength division multiplexing element includes:
202, arranging a light receiving surface of the optical fiber array at a preset focal length position of the array lens through observation and positioning of a visual identification device, wherein the preset focal length position of the array lens is L away from the wavelength division multiplexing component shell 2 ＝F 1 -L 1 The position of (a).
Fig. 3 is a flowchart of a method for coupling a wavelength division multiplexing module according to still another embodiment of the present invention, where the method for disposing a light receiving surface of an optical fiber array at a preset focal position of an array lens of the wavelength division multiplexing module to be coupled, the array lens including an optical port adapter, a wavelength division multiplexing module housing, and a wavelength division multiplexing element, includes:
Fig. 4 is a flowchart of a method for coupling a wavelength division multiplexing module according to still another embodiment of the present invention, in which the optical port lens is clamped by the apparatus chuck for adjustment, and an approximate optical path position of the wavelength division multiplexing module to be coupled, including the optical port adapter, the wavelength division multiplexing module housing, and the wavelength division multiplexing element, is obtained, including:
and step 403, recording the position of the optical port lens when the multi-path test optical power meets the test optical power threshold.
Fig. 5 is a block diagram of a system for coupling wavelength division multiplexing components according to an embodiment of the present invention, where the system includes:
a focal length position setting module 501, configured to set a light receiving surface of the optical fiber array at a focal length position preset by an array lens of a wavelength division multiplexing component to be coupled, where the array lens includes an optical port adapter, a wavelength division multiplexing component housing, and a wavelength division multiplexing element;
an adjusting module 502, configured to clamp an optical port lens by an apparatus chuck for adjustment, so that a multi-channel optical power received by an optical fiber array disposed at a rear end of the adjusted wavelength division multiplexing component to be coupled, including the optical port adapter, the wavelength division multiplexing component housing, and the wavelength division multiplexing element, meets a preset value, and the optical port lens is in a state of being clamped by the apparatus chuck after the adjustment;
the horizontal and vertical fine tuning module 503 is configured to simultaneously perform first fine tuning in a horizontal axial direction and a vertical axial direction by clamping the array lens and the optical port lens by an equipment chuck, so that multiplexed light received by an optical fiber array at the rear end of a wavelength division multiplexing assembly to be coupled, which includes the optical port adapter, the wavelength division multiplexing assembly housing and the wavelength division multiplexing element, is aligned with a light receiving surface of the optical fiber array in the horizontal direction and the vertical direction;
a different step fine-tuning module 504, configured to perform second fine-tuning on the optical port lens and the array lens in the same direction but in different steps in the optical path focal length axial direction, so that the area of a light spot received by a light receiving surface of the optical fiber array, which is disposed at the rear end of the wdm assembly to be coupled and includes the optical port adapter, the wdm assembly housing, and the wdm element, is the smallest, and the positions of the optical port lens and the array lens are obtained;
and a fixing module 505, configured to perform second fine tuning on the optical port lens and the array lens in the same direction but different steps in the axial direction of the optical path focal length, so that the area of a light spot received by a light receiving surface of the optical fiber array, which is disposed at the rear end of the wdm assembly to be coupled and includes the optical port adapter, the wdm assembly housing and the wdm element through the second fine tuning, is the minimum, and the positions of the optical port lens and the array lens are obtained.
In the embodiment of the invention, the array lens is an element in the wavelength division multiplexing assembly, and the function of the array lens is to converge parallel light formed by processing of other elements in the wavelength division multiplexing assembly to the light receiving chip, or collimate light emitted by the light emitting chip into parallel light. When the wavelength division multiplexing component is coupled, the placement position of the array lens needs to be set according to the light path requirement, so that the light emitted by the array lens is converged at the focal length position of the array lens, and whether the light is converged at the focal length position needs to be presented through the light receiving surface of an optical fiber array, therefore, an optical fiber array needs to be set, and the light receiving surface of the optical fiber array is located at the preset focal length position of the array lens.
The optical port lens is clamped by the equipment chuck for adjustment, so that the optical power of the multi-path light irradiated on the optical fiber array meets a preset power value after the coupling light source passes through the optical port adapter, the optical port lens and the wavelength division multiplexing element. Wherein, the preset power value is as follows: when the power of the coupling light source is 0dbm, the optical power of the multipath light is-30 dbm to-20 dbm. It is noted that after this adjustment is completed, the port lens is still in a state of being held by the device chuck.
After the adjustment is completed, the array lens and the optical port lens are clamped by the equipment chuck to simultaneously perform first fine adjustment in the horizontal axial direction and the vertical axial direction respectively, so that the multipath light irradiated on the optical fiber array is aligned to the light receiving surface of the optical fiber array after the coupling light source passes through the optical port adapter, the optical port lens, the array lens and the wavelength division multiplexing element. The standard of aligning the light receiving surfaces of the optical fiber array is as follows: when the power of the coupling light source is 0dbm, the optical power of the multipath light received by the optical fiber array is-15 dbm to-10 dbm.
Fine tuning the aperture lens in the same direction at different steps along the optical path focal length axis (step S) 4 ) And an array lens (step S) 5 <S 4 ) The light spot received by the light receiving surface of the optical fiber array is minimized, that is, the light spot is at the optimal focal length position (for example, under the condition that the provided coupling light source is 0dbm, the multipath optical power received by the optical fiber array all meets-2 to-1 dbm); preferably, the incident focal length of the optical port lens is assumed to be F 0 The preset distance between the optical port lens and the array lens is F 3 Focal length of the array lens is F 1 (ii) a When the optical port lens is stepped by S 4 When moving, the theoretical optimal matching distance between the optical port lens and the array lens is (S) 4 *F 3 )/F 0 I.e. the optical aperture lens is stepped by S 4 While the array lens corresponds to the best matching step S 5 Can be set as (S) 4 *F 3 )/F 0 ]*(F 1 /F 3 )＝(S 4 *F 1 )/F 0 。
In the embodiment of the present invention, a light receiving surface of an optical fiber array is disposed at a focal length position preset by an array lens of a wavelength division multiplexing component to be coupled, where the wavelength division multiplexing component to be coupled includes: the optical interface adapter, the wavelength division multiplexing assembly shell and the wavelength division multiplexing element; adjusting the optical port lens to enable the multi-path optical power received by the optical fiber array to accord with a preset value, so as to obtain the approximate optical path position of the wavelength division multiplexing component to be coupled; and finely adjusting the optical port lens and the array lens respectively and simultaneously in the horizontal axial direction and the vertical axial direction, and finely adjusting the optical port lens and the array lens in the same direction in different steps in the optical path focal length axial direction so as to minimize the area of the light spot received by the light receiving surface of the optical fiber array. The optical power of the multiple paths of light irradiated on the optical fiber array meets the preset value through coarse coupling, the requirements for the space between the multiple paths of light paths after demultiplexing by the wavelength division multiplexing element and the size of the multiple paths of light power are met preliminarily guaranteed, the optical port lens and the array lens are trimmed in the horizontal direction and the vertical direction synchronously in the follow-up process, the difficulty of synchronous trimming can be reduced, the accuracy of synchronous trimming can be improved, and the coupling efficiency is further improved. The optical port lens and the array lens are adjusted in the horizontal axial direction and the vertical axial direction simultaneously and synchronously, fine adjustment accuracy is guaranteed, and coupling speed is guaranteed.
As an alternative embodiment of the present invention, the system further comprises:
and the horizontal angle fine-tuning module is used for acquiring the optical power of the multipath light received by the optical fiber array, and if the optical power is lower than a preset optical power threshold, fine-tuning the horizontal angle of the optical port lens by a preset tuning range until the optical power is larger than the optical power threshold.
In the embodiment of the invention, the wavelength division multiplexing component may cause the optical power to be lower than the optical power threshold value due to the deviation of the optical path caused by the production tolerance or the mounting deviation during the production or assembly. Therefore, it is necessary to adjust the horizontal angle of the optical port lens in the horizontal direction according to the preset adjustment range until the optical power is greater than the optical power threshold. Through angle regulation, certain correction can be carried out to the light path of skew to promote coupling efficiency. The optical power threshold and the adjustment amplitude can be set according to actual use requirements, which is not limited in the present application. Preferably, when the coupled light source is provided at 0dbm, the optical power threshold is between-2 and-1 dbm, and the adjustment amplitude is 0.1 °.
As shown in fig. 6, which is a block diagram of a system coupled to a wdm assembly according to still another embodiment of the present invention, the focus setting module 501 includes:
a distance obtaining unit 601, configured to obtain that the preset distance between the array lens and the wdm assembly housing is L 1 The focal length of the array lens is F 1 ；
A focal length setting unit 602, configured to set the light receiving surface of the optical fiber array at a preset focal length position of the array lens through observation and positioning of the visual recognition device,the preset focal length position of the array lens is L away from the wavelength division multiplexing component shell 2 ＝F 1 -L 1 The position of (a).
As shown in fig. 7, which is a block diagram of a system coupled with a wavelength division multiplexing component according to another embodiment of the present invention, the focal length position setting module 501 includes:
an optical power obtaining unit 701, configured to receive, through the optical fiber array, multiple paths of light emitted by a standard wavelength division multiplexing component, and obtain optical power of the multiple paths of light irradiated on the optical fiber array;
a standard position recording unit 702, configured to adjust a position of the optical fiber array, so that optical power received by the optical fiber array meets standard optical power, and record the position of the optical fiber array at this time as a standard position;
a focal length position recording unit 703, configured to record the standard position as the focal length position.
As shown in fig. 8, which is a block diagram of a system coupled with a wdm component according to another embodiment of the present invention, the adjusting module 502 includes:
a coupling light source input module 801, configured to input a coupling light source to the wavelength division multiplexing component to be coupled;
a test optical power recording unit 802, configured to adjust the optical port lens horizontally forward and/or horizontally upward, and record a multi-path test optical power of the coupled light source falling on the optical fiber array during the adjustment process;
and a rough optical path position setting unit 803 for recording the position of the optical port lens when the multi-path test optical power meets the test optical power threshold.
It should be understood that, although the various steps in the flowcharts of the figures are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in a strict order, and may be performed in other orders, unless explicitly stated otherwise herein. Moreover, at least a portion of the steps in the flow chart of the figures may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, in different orders, and may be performed alternately or in turns with other steps or at least a portion of the sub-steps or stages of other steps.
The above description is only a partial implementation of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and embellishments can be made without departing from the principle of the present invention, and these modifications and embellishments should also be regarded as the protection scope of the present invention.
Claims (10)
1. A method of wavelength division multiplexing component coupling, the method comprising:
arranging a light receiving surface of the optical fiber array at a preset focal length position of an array lens of a wavelength division multiplexing component to be coupled, which comprises an optical port adapter, a wavelength division multiplexing component shell and a wavelength division multiplexing element;
clamping an optical port lens by an equipment chuck for adjustment, so that the multipath optical power received by an optical fiber array arranged at the rear end of the adjusted wavelength division multiplexing assembly to be coupled, which comprises an optical port adapter, a wavelength division multiplexing assembly shell and a wavelength division multiplexing element, meets a preset value, and the optical port lens is in a state of being clamped by the equipment chuck after the adjustment;
clamping the array lens and the optical port lens by an equipment chuck, and simultaneously performing first fine adjustment in the horizontal axial direction and the vertical axial direction respectively, so that multi-path light received by an optical fiber array at the rear end of a wavelength division multiplexing component to be coupled, which comprises an optical port adapter, a wavelength division multiplexing component shell and a wavelength division multiplexing element, is aligned to the light receiving surface of the optical fiber array in the horizontal direction and the vertical direction;
a second fine adjustment is carried out on the optical port lens and the array lens in the same direction but different steps in the axial direction of the focal length of the optical path, so that the area of a light spot received by a light receiving surface of an optical fiber array arranged at the rear end of a wavelength division multiplexing component to be coupled, which comprises an optical port adapter, a wavelength division multiplexing component shell and a wavelength division multiplexing element, is the minimum, and the positions of the optical port lens and the array lens are obtained;
and fixing the optical port lens and the array lens to a wavelength division multiplexing component to be coupled, which comprises an optical port adapter, a wavelength division multiplexing component shell and a wavelength division multiplexing element, according to the positions.
2. The method of claim 1, wherein after fine tuning the port lens and the array lens in the same direction but different steps simultaneously in the optical path focal length axis, the method further comprises:
and obtaining the optical power of the multipath light received by the optical fiber array, and if the optical power is lower than a preset optical power threshold, finely adjusting the horizontal angle of the optical port lens by a preset adjustment amplitude until the optical power is larger than the optical power threshold.
3. The method according to any one of claims 1-2, wherein the disposing the light receiving surface of the optical fiber array at a predetermined focal length position of an array lens of the wavelength division multiplexing module to be coupled, which includes the optical port adapter, the wavelength division multiplexing module housing, and the wavelength division multiplexing component, comprises:
obtaining the preset distance L between the array lens and the wavelength division multiplexing component shell 1 The focal length of the array lens is F 1 ；
Observing and positioning through a visual recognition device, arranging the light receiving surface of the optical fiber array at the preset focal length position of the array lens, wherein the preset focal length position of the array lens is L away from the wavelength division multiplexing component shell 2 ＝F 1 -L 1 Of the position of (a).
4. The method according to any one of claims 1-2, wherein said positioning the light receiving surface of the fiber array at a predetermined focal position of an array lens of a wavelength division multiplexing module to be coupled, which includes an optical port adapter, a wavelength division multiplexing module housing, and a wavelength division multiplexing element, comprises:
receiving multipath light emitted by a standard wavelength division multiplexing component through the optical fiber array, and acquiring the optical power of the multipath light irradiated on the optical fiber array;
adjusting the position of the optical fiber array to make the optical power received by the optical fiber array meet the standard optical power, and recording the position of the optical fiber array at the moment as the standard position;
recording the standard position as the focal length position.
5. The method of any of claims 1-2, wherein said fine tuning said port lens and array lens in the same direction but different steps simultaneously in the optical path focal length axis comprises:
the incident focal length of the optical port lens is F 0 The preset distance between the optical port lens and the array lens is F 3 Focal length of the array lens is F 1 When the optical port lens is stepped by S 4 The theoretical best matching distance between the optical port lens and the array lens during movement is (S) 4 *F 3 )/F 0 Step-by-step of the optical lens as S 4 While the array lens corresponds to the best matching step S 5 Is set as (S) 4 *F 3 )/F 0 ]*(F 1 /F 3 )＝(S 4 *F 1 )/F 0 。
6. A system for wavelength division multiplexing component coupling, the system comprising:
the focal length position setting module is used for setting a light receiving surface of the optical fiber array at a focal length position preset by an array lens of a wavelength division multiplexing component to be coupled, wherein the array lens comprises an optical port adapter, a wavelength division multiplexing component shell and a wavelength division multiplexing element;
the adjusting module is used for clamping an optical port lens by an equipment chuck for adjustment, so that the multipath optical power received by an optical fiber array arranged at the rear end of the adjusted wavelength division multiplexing assembly to be coupled, which comprises an optical port adapter, a wavelength division multiplexing assembly shell and a wavelength division multiplexing element, accords with a preset value, and the optical port lens is in a state of being clamped by the equipment chuck after the adjustment;
the horizontal and vertical fine adjustment module is used for clamping the array lens and the optical port lens by an equipment chuck and simultaneously performing first fine adjustment in the horizontal axial direction and the vertical axial direction respectively so that multi-path light received by an optical fiber array at the rear end of a wavelength division multiplexing component to be coupled, which comprises an optical port adapter, a wavelength division multiplexing component shell and a wavelength division multiplexing element, is aligned to the light receiving surface of the optical fiber array in the horizontal direction and the vertical direction;
the different stepping fine adjustment module is used for performing second fine adjustment on the optical port lens and the array lens in the same direction but different steps in the axial direction of the focal length of the optical path, so that the area of a light spot received by a light receiving surface of an optical fiber array which is arranged at the rear end of the wavelength division multiplexing component to be coupled and comprises an optical port adapter, a wavelength division multiplexing component shell and a wavelength division multiplexing element is minimum, and the positions of the optical port lens and the array lens are obtained;
and the fixing module is used for simultaneously carrying out second fine adjustment on the optical port lens and the array lens in the same direction but different steps in the optical path focal length axial direction, so that the area of a light spot received by a light receiving surface of the optical fiber array at the rear end of the wavelength division multiplexing component to be coupled, which comprises the optical port adapter, the wavelength division multiplexing component shell and the wavelength division multiplexing component, through the second fine adjustment is minimum, and the positions of the optical port lens and the array lens are obtained.
7. The system of claim 6, wherein the system further comprises:
and the horizontal angle fine-tuning module is used for acquiring the optical power of the multipath light received by the optical fiber array, and if the optical power is lower than a preset optical power threshold, fine-tuning the horizontal angle of the optical port lens by a preset tuning range until the optical power is larger than the optical power threshold.
8. The system of any one of claims 6-7, wherein the focal position setting module comprises:
a distance acquiring unit for acquiring the distance between the array lens and the WDM assembly housingIs L 1 The focal length of the array lens is F 1 ；
A focal length position setting unit for observing and positioning through the visual recognition device, and setting the light receiving surface of the optical fiber array at the preset focal length position of the array lens, wherein the preset focal length position of the array lens is L away from the wavelength division multiplexing component shell 2 ＝F 1 -L 1 The position of (a).
9. The system of any one of claims 6-7, wherein the focal position setting module comprises:
the optical power acquisition unit is used for receiving the multipath light emitted by the standard wavelength division multiplexing component through the optical fiber array and acquiring the optical power of the multipath light irradiated on the optical fiber array;
the standard position recording unit is used for adjusting the position of the optical fiber array, so that the optical power received by the optical fiber array meets the standard optical power, and recording the position of the optical fiber array at the moment as the standard position;
a focal length position recording unit for recording the standard position as the focal length position.
10. The system of any one of claims 6-7, wherein said fine tuning said port lens and array lens in the same direction but different steps simultaneously in the optical path focal length axis comprises:
the incident focal length of the optical port lens is F 0 The preset distance between the optical port lens and the array lens is F 3 Focal length of the array lens is F 1 When the optical port lens is stepped by S 4 The theoretical best matching distance between the optical port lens and the array lens during movement is (S) 4 *F 3 )/F 0 The optical aperture lens is stepped to S 4 While the array lens corresponds to the best matching step S 5 Is set as (S) 4 *F 3 )/F 0 ]*(F 1 /F 3 )＝(S 4 *F 1 )/F 0 。
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