Method for preparing high-precision optical fiber collimator array and optical fiber collimator array

Abstract

The invention relates to a method for preparing a high-precision optical fiber collimator array and the optical fiber collimator array. The method for preparing the high-precision optical fiber collimator array comprises the following steps: mounting collimating lenses in close fit in mounting holes distributed in an array on a positioning substrate; inserting an optical fiber pin into the mounting hole, and moving the optical fiber pin along the radial direction of the mounting hole, so that all the collimated light beams are parallel to each other; wherein the outer diameter of the optical fiber pin is smaller than the inner diameter of the mounting hole; and all the optical fiber pins are fixed in the mounting holes to form a high-precision optical fiber collimator array. According to the invention, the mounting hole in close fit with the collimating lens is formed in the positioning substrate, so that the mounting precision of the collimating lens is ensured, meanwhile, the outer diameter of the optical fiber pin is set to be smaller than the inner diameter of the mounting hole, and all the collimated light beams are adjusted to be parallel to each other by moving the optical fiber pin in the radial direction of the mounting hole. According to the invention, the parallelism between the collimated light beams can be ensured, and the technical problem of deterioration of the parallelism between the output light beams of the collimator array in the prior art is solved.

Description

Technical Field

[0001] This application relates to the field of optical fiber communication technology, specifically to a method for preparing a high-precision optical fiber collimator array and the optical fiber collimator array itself. Background Technology

[0002] With the rapid development and widespread application of optical fiber communication technology, high-speed, high-capacity optical communication networks have become a crucial infrastructure for modern information society. In cutting-edge application areas such as 5G communication, data center interconnection, and optical switching networks, the performance requirements for optical devices are increasingly stringent. Two-dimensional fiber collimator arrays, as key optical devices, play a vital role in beam shaping, spatial optical path coupling, and optical switching systems. High-quality collimator arrays require output beams with excellent parallelism characteristics to ensure low loss and high stability of optical signals during transmission. Especially in large-scale optical interconnect systems, the parallelism between the output beams of the collimator array directly affects the overall system performance, becoming one of the key factors restricting technological development. Therefore, developing high-precision two-dimensional fiber collimator array technology has significant application value and market demand.

[0003] In related technologies, the industry commonly uses a two-dimensional fiber array coupled with a two-dimensional microlens array to construct a two-dimensional fiber collimator array. However, due to the low center positioning accuracy of the microlens array, the misalignment between each fiber and each lens causes the parallelism between the output beams of the collimator array to deteriorate.

[0004] Therefore, it is necessary to design a new method for fabricating high-precision fiber collimator arrays to overcome the above problems. Summary of the Invention

[0005] This application provides a method for preparing a high-precision fiber collimator array and a fiber collimator array, which can solve the technical problem of deterioration in the parallelism between the output beams of the collimator array in related technologies.

[0006] In a first aspect, embodiments of this application provide a method for fabricating a high-precision fiber collimator array, comprising the following steps: A collimating lens is installed in a series of mounting holes distributed on the positioning substrate. Insert the fiber optic ferrule into the mounting hole and move the fiber optic ferrule radially along the mounting hole to make all collimated beams parallel to each other; wherein the outer diameter of the fiber optic ferrule is smaller than the inner diameter of the mounting hole. All fiber optic pins are fixed in the mounting holes to form a high-precision fiber optic collimator array.

[0007] In conjunction with the first aspect, in one embodiment, inserting the fiber optic ferrule into the mounting hole and moving the fiber optic ferrule radially along the mounting hole includes: Insert the fiber optic ferrule into the mounting hole and move the ferrule up or down in the mounting hole.

[0008] In conjunction with the first aspect, in one embodiment, inserting the fiber optic ferrule into the mounting hole and moving the fiber optic ferrule radially along the mounting hole to make all collimated beams parallel to each other includes: The fiber optic ferrule is moved radially along the mounting hole, and the coupling loss between the fiber optic ferrule and the collimating lens and the reference collimator is monitored to determine whether each collimated beam is level.

[0009] In conjunction with the first aspect, in one embodiment, the radial movement of the fiber optic ferrule along the mounting hole and the determination of whether each collimated beam is leveled by monitoring the coupling loss between the fiber optic ferrule and the collimating lens and the reference collimator include: Adjust the relative position of the reference collimator and the positioning substrate so that the reference collimator is aligned with one of the collimating lenses along the axial direction. Move the fiber optic ferrule corresponding to the collimating lens radially along the mounting hole until the coupling loss between the fiber optic ferrule and the collimating lens and the reference collimator is minimized. At this time, the collimated beam is adjusted to a horizontal state. Adjust the relative position of the reference collimator and the positioning substrate so that the reference collimator is aligned with another collimating lens along the axial direction, and move the fiber optic ferrule corresponding to the collimating lens radially along the mounting hole until the coupling loss between the fiber optic ferrule and the collimating lens and the reference collimator is minimized. At this time, the collimated beam is adjusted to a horizontal state. Continue adjusting the relative position of the reference collimator and the positioning substrate, and adjust the remaining fiber optic pins until all collimated beams are level.

[0010] In conjunction with the first aspect, in one embodiment, the reference collimator and the positioning substrate are distributed longitudinally at intervals, and the axis of the reference collimator is longitudinal; adjusting the relative position of the reference collimator and the positioning substrate includes: Move the positioning base plate or reference collimator laterally, or move the reference collimator or positioning base plate vertically.

[0011] In conjunction with the first aspect, in one embodiment, after mounting a closely fitted collimating lens in an array of mounting holes on the positioning substrate, the method further includes: Move the fiber optic ferrule along the axis of the mounting hole to adjust the waist position of the collimated beam.

[0012] In conjunction with the first aspect, in one embodiment, fixing all the fiber optic ferrules to the mounting holes to form a high-precision fiber optic collimator array includes: A high-precision fiber optic collimator array is formed by filling the gaps between the fiber optic ferrule and the mounting hole, and between the fiber optic ferrule and the collimating lens with glue and then curing it.

[0013] In conjunction with the first aspect, in one embodiment, the process of filling the gaps between the fiber optic ferrule and the mounting hole, and between the fiber optic ferrule and the collimating lens with adhesive and then curing it to form a high-precision fiber optic collimator array includes: After filling the gaps between the fiber optic ferrule and the mounting hole, and between the fiber optic ferrule and the collimating lens with adhesive, the adhesive is first pre-cured and then heated to cure, forming a high-precision fiber optic collimator array.

[0014] In conjunction with the first aspect, in one embodiment, the mounting hole extends through the two opposing surfaces of the positioning substrate along the axial direction of the collimating lens, and both the fiber optic ferrule and the collimating lens are inserted into the mounting hole.

[0015] Secondly, embodiments of this application provide a high-precision fiber collimator array prepared by the above method, comprising: a positioning substrate, wherein a plurality of mounting holes are arrayed on the positioning substrate, and a collimating lens is tightly fitted in each mounting hole; and a fiber optic ferrule is also fixed in each positioning hole, wherein the outer diameter of the fiber optic ferrule is smaller than the inner diameter of the mounting hole.

[0016] The beneficial effects of the technical solutions provided in this application include: By setting mounting holes on the positioning substrate that fit tightly with the collimating lens, the installation accuracy of the collimating lens is ensured. At the same time, the outer diameter of the fiber optic ferrule is set to be smaller than the inner diameter of the mounting hole. By moving the fiber optic ferrule radially along the mounting hole, all collimated beams can be adjusted to be parallel to each other, which can ensure the parallelism between collimated beams and solve the technical problem of the deterioration of the parallelism between the output beams of the collimator array in related technologies. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A flowchart illustrating a method for fabricating a high-precision fiber collimator array, provided in this application embodiment; Figure 2 A schematic diagram of the structure for mounting a collimating lens and an optical fiber ferrule in a mounting hole provided in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the positioning substrate provided in the embodiments of this application; Figure 4 This is a schematic diagram of the structure provided in the embodiment of the present application for collimating the beam downward by moving the upward fiber optic ferrule; Figure 5 This is a schematic diagram of the structure provided in the embodiment of the present application for collimating the beam upward by moving the fiber optic ferrule downward; Figure 6 Angular mismatch of collimated beam provided in the embodiments of this application A schematic diagram; Figure 7 Angular mismatch provided in the embodiments of this application Relationship with insertion loss; Figure 8 A schematic diagram of the coupling structure between the fiber optic collimator and the reference collimator provided in the embodiments of this application; Figure 9 This is a schematic diagram of the structure for adjusting the relative position of the reference collimator and the positioning substrate provided in an embodiment of this application; Figure 10 for Figure 9 A structural diagram from another perspective; Figure 11 A schematic diagram of the waist-cinching position provided in the embodiments of this application; Figure 12 Another schematic diagram of the waist-binding position provided in this application embodiment; Figure 13 This is a schematic diagram of the structure provided in the embodiment of the present application, showing the rightward movement of the fiber optic ferrule waist position and its leftward shift. Figure 14 This is a schematic diagram of the structure provided in the embodiment of this application, showing the leftward movement of the fiber optic ferrule waist position and its rightward shift.

[0019] In the picture: 1. Positioning substrate; 11. Mounting holes; 2. Collimating lens; 3. Fiber optic ferrule; 4. Reference collimator; 5. Horizontal guide rail; 6. Adjustment bracket. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0021] This application provides a method for preparing a high-precision fiber collimator array and a fiber collimator array, which can solve the technical problem of deterioration in the parallelism between the output beams of the collimator array in related technologies.

[0022] See Figure 1 As shown in the figure, this application provides a method for fabricating a high-precision fiber collimator array, which includes the following steps: S100: A collimating lens 2 is installed in the mounting holes 11 arranged in an array on the positioning substrate 1.

[0023] S200: Insert the fiber optic ferrule 3 into the mounting hole 11 and move the fiber optic ferrule 3 radially along the mounting hole 11 so that all collimated beams are parallel to each other; wherein, the outer diameter of the fiber optic ferrule 3 is smaller than the inner diameter of the mounting hole 11.

[0024] S300: Fix all fiber optic ferrules 3 to the mounting holes 11 to form a high-precision fiber optic collimator array.

[0025] It should be understood that, see Figure 2 and Figure 3 As shown, in this embodiment, the positioning substrate 1 has multiple mounting holes 11 arranged in an array. Each mounting hole 11 shown in the figure penetrates both the left and right surfaces of the positioning substrate 1 along the axial direction of the collimating lens 2. A fiber optic ferrule 3 and a collimating lens 2 are inserted into the same mounting hole 11 from the left and right sides of the positioning substrate 1. In other embodiments, the mounting holes 11 can be configured as blind holes, that is, a partition is provided between the collimating lens 2 and the fiber optic ferrule 3 along the axial direction to form two blind holes on the left and right sides, with the fiber optic ferrule 3 installed on the left and the collimating lens 2 installed on the right. In the above embodiments, the positioning substrate 1 is preferably made of a high-precision glass substrate.

[0026] It should be understood that in step S200, the outer diameter of the fiber optic ferrule 3 is slightly smaller than the inner diameter of the mounting hole 11. Because the outer diameter of the fiber optic ferrule 3 is smaller than the inner diameter of the mounting hole 11, the fiber optic ferrule 3 can move in any direction within the mounting hole 11. For example, it can move not only axially left and right, but also radially up and down, and forward and backward. In this embodiment, the collimating lens 2 is tightly fitted to the mounting hole 11 to ensure positioning accuracy. After the collimating lens 2 is installed in the mounting hole 11, it no longer moves, while the fiber optic ferrule 3 will move. When moving the fiber optic ferrule 3, it can move in any radial direction, as long as all collimated beams are ultimately parallel to each other.

[0027] This embodiment ensures the installation accuracy of the collimating lens 2 by providing mounting holes 11 on the positioning substrate 1 that fit tightly with the collimating lens 2, and ensures the spacing accuracy between the collimating lenses 2 by using the high-precision positioning substrate 1. At the same time, the outer diameter of the fiber optic ferrule 3 is set to be smaller than the inner diameter of the mounting hole 11. By moving the fiber optic ferrule 3 one by one along the radial direction of the mounting hole 11, all collimated beams can be adjusted to a state of mutual parallelism, which can ensure the parallelism between the collimated beams and solve the technical problem of the deterioration of the parallelism between the output beams of the collimator array in related technologies.

[0028] Further, in one embodiment, inserting the fiber optic ferrule 3 into the mounting hole 11 and moving the fiber optic ferrule 3 radially along the mounting hole 11 may include: inserting the fiber optic ferrule 3 into the mounting hole 11 and moving the fiber optic ferrule 3 upward or downward within the mounting hole 11. See also Figure 4 and Figure 5 As shown, moving the fiber optic ferrule 3 upwards deflects the collimated beam downwards, and moving it downwards deflects it upwards. Therefore, by moving the fiber optic ferrule 3 vertically upwards or downwards, the angular direction of the collimated beam can be adjusted. In other embodiments, the fiber optic ferrule 3 can also be moved in other directions, such as forwards or backwards. The axis of the mounting hole 11 is defined as longitudinal, the up-down direction as vertical, and the forward-backward direction as transverse, with the transverse direction perpendicular to both the longitudinal and vertical directions.

[0029] Furthermore, in some embodiments, inserting the fiber optic ferrule 3 into the mounting hole 11 and moving the fiber optic ferrule 3 radially along the mounting hole 11 to make all collimated beams parallel to each other may include: moving the fiber optic ferrule 3 radially along the mounting hole 11 and determining whether each collimated beam is adjusted to a horizontal state by monitoring the coupling loss between the fiber optic ferrule 3 and the collimating lens 2 and the reference collimator 4.

[0030] The coupling of Gaussian beams is affected by various mismatch factors. The coupling efficiency T is: Combining Figure 6 and Figure 7 As shown, .

[0031] in, The optical field distribution of the theoretical Gaussian field at the receiving end; The light field distribution of the theoretical Gaussian field at the output end; The waist radius; This is an angular mismatch; For wave vector, k =2π / λ; λ is the wavelength.

[0032] The coupling loss between collimated Gaussian beams is highly sensitive to angular mismatch. For example, a collimated beam with a beam waist radius of 200 μm will experience a coupling loss of 0.025 dB with an angular mismatch of 0.01°. Therefore, this embodiment utilizes coupling loss to monitor the beam direction.

[0033] See Figure 8 As shown, the collimator on the right is the reference collimator 4, which serves as the criterion for monitoring the direction of the beam; the collimator on the left currently has the fiber optic ferrule 3 tilted downwards, causing the collimated beam to tilt upwards. The collimated beam can be adjusted to be horizontal and coupled into the reference collimator 4 on the right by moving the fiber optic ferrule 3 upwards.

[0034] See Figure 9 and Figure 10 As shown, in this embodiment, a reference collimator 4 is provided on the right side of the positioning substrate 1 for coupling with the fiber optic ferrule 3 and collimating lens 2 on the left side of the positioning substrate 1. The collimator 3 can be moved upwards, downwards, forwards, or backwards, and the coupling loss with the reference collimator 4 can be monitored continuously during the movement to determine whether the collimated beam is level. In other embodiments, other methods can be used to determine whether the collimated beam is level; this is not a limitation.

[0035] Further, in one embodiment, the radial movement of the fiber optic ferrule 3 along the mounting hole 11, and the determination of whether each collimated beam is adjusted to a horizontal state by monitoring the coupling loss between the fiber optic ferrule 3 and the collimating lens 2 and the reference collimator 4, may include: S201: Adjust the relative position of the reference collimator 4 and the positioning substrate 1 so that the reference collimator 4 is aligned with one of the collimating lenses 2 along the axial direction. Move the fiber optic ferrule 3 corresponding to the collimating lens 2 radially along the mounting hole 11 until the coupling loss between the fiber optic ferrule 3 and the collimating lens 2 and the reference collimator 4 is minimized. At this time, the collimated beam is adjusted to a horizontal state.

[0036] S202: Adjust the relative position of the reference collimator 4 and the positioning substrate 1 so that the reference collimator 4 is aligned with another collimating lens 2 along the axial direction, and move the fiber optic ferrule 3 corresponding to the collimating lens 2 radially along the mounting hole 11 until the coupling loss between the fiber optic ferrule 3 and the collimating lens 2 and the reference collimator 4 is minimized. At this time, the collimated beam is adjusted to a horizontal state.

[0037] S203: Continue to adjust the relative position of the reference collimator 4 and the positioning substrate 1 and adjust the remaining fiber optic pins 3 until all collimated beams are adjusted to a horizontal state.

[0038] See Figure 10As shown, a reference collimator 4 is set on the right side of the positioning base plate 1. Multiple collimating lenses 2 and multiple fiber optic pins 3 are arranged on the positioning base plate 1. During adjustment, each lens can be adjusted individually. That is, the reference collimator 4 is first aligned with one of the collimating lenses 2, and the fiber optic pin 3 in the mounting hole 11 of that collimating lens 2 is adjusted. After adjustment, the reference collimator 4 is aligned with the next collimating lens 2, and the next fiber optic pin 3 is adjusted, until all collimated beams are adjusted to a horizontal state, at which point all collimated beams are parallel to each other. In this embodiment, by adjusting each fiber optic pin 3 individually, all collimated beams are achieved to be parallel to each other.

[0039] Further, in one embodiment, the reference collimator 4 and the positioning substrate 1 are distributed longitudinally at intervals, and the axis of the reference collimator 4 is longitudinal; adjusting the relative position of the reference collimator 4 and the positioning substrate 1 includes: moving the positioning substrate 1 or the reference collimator 4 laterally, or moving the reference collimator 4 or the positioning substrate 1 vertically. In this embodiment, when adjusting the relative position of the reference collimator 4 and the positioning substrate 1, the reference collimator 4 can be adjusted while the positioning substrate 1 remains stationary; the positioning substrate 1 can be adjusted while the reference collimator 4 remains stationary; or both the reference collimator 4 and the positioning substrate 1 can be adjusted.

[0040] See Figure 10 As shown, an optional embodiment is illustrated. In this embodiment, the positioning substrate 1 is mounted on the transverse guide rail 5, and the reference collimator 4 is mounted on the adjustment frame 6. The positioning substrate 1 can move laterally on the transverse guide rail 5, and the reference collimator 4 can move vertically on the adjustment frame 6, while the longitudinal relative position between the reference collimator 4 and the positioning substrate 1 remains unchanged. In other embodiments, the positioning substrate 1 can be mounted in a fixed position, and the adjustment frame 6 can move the reference collimator 4 in both the transverse and vertical directions; this approach is also feasible. In this way, individual adjustment of each collimator in a two-dimensional fiber optic collimator array can be achieved, ensuring that all collimated beams are parallel to each other.

[0041] Furthermore, in some optional embodiments, after mounting the collimating lens 2 in the array of mounting holes 11 on the positioning substrate 1, the method may further include: moving the fiber optic ferrule 3 along the axial direction of the mounting hole 11 to adjust the waist position of the collimated beam.

[0042] See Figure 11 As shown in the figure, ,in, for; and λ represents the waist size of the Gaussian beam before and after passing through the lens; λ is the wavelength.

[0043] See Figure 12 As shown in the figure, ,in , and These represent the waist positions of the Gaussian beam before and after passing through the lens; This is the Rayleigh distance.

[0044] See Figure 13 As shown, when the fiber optic ferrule 3 is moved to the right along the axial direction of the mounting hole 11, the waist position of the collimated beam moves to the left; see also Figure 14 As shown, when the fiber optic ferrule 3 is moved to the left along the axial direction of the mounting hole 11, the waist position of the collimated beam moves to the right. Therefore, by moving the position of each fiber optic ferrule 3 along the axial direction of the mounting hole 11, the waist position of each collimated beam can be adjusted.

[0045] Furthermore, in one embodiment, fixing all the fiber optic ferrules 3 to the mounting holes 11 to form a high-precision fiber optic collimator array includes: filling the gaps between the fiber optic ferrules 3 and the mounting holes 11, and the gaps between the fiber optic ferrules 3 and the collimating lens 2 with adhesive, and then curing the adhesive to form the high-precision fiber optic collimator array. See also Figure 10 As shown, after the fiber optic ferrule 3 is adjusted, there will inevitably be a gap between the side of the fiber optic ferrule 3 and the inner wall of the mounting hole 11. There may or may not be a gap between the end face of the fiber optic ferrule 3 and the collimating lens 2. By filling the gap in the mounting hole 11 with glue and allowing it to cure, all fiber optic ferrules 3 can be fixed in the mounting hole 11 after the position is adjusted. Preferably, the glue used for filling is glue with a refractive index that is close to that of the fiber optic ferrule 3.

[0046] Preferably, the process of filling and curing adhesive in the gaps between the fiber optic ferrule 3 and the mounting hole 11, and between the fiber optic ferrule 3 and the collimating lens 2, to form a high-precision fiber optic collimator array, may include: filling the gaps between the fiber optic ferrule 3 and the mounting hole 11, and between the fiber optic ferrule 3 and the collimating lens 2, pre-curing the adhesive, and then heating and curing to form the high-precision fiber optic collimator array. In this embodiment, after adjusting the fiber optic ferrule 3 to make the collimated beam horizontal, adhesive is filled in the gap of the mounting hole 11. Then, the adhesive is pre-cured with ultraviolet light. During the pre-curing process, the position of the fiber optic ferrule 3 can be finely adjusted in the mounting hole 11. For example, if stress occurs during the pre-curing process, the fiber optic ferrule 3 can be adjusted while curing, making the curing more stable. After pre-curing, the adhesive is then heated and cured, making the fiber optic ferrule 3 completely immobile and more firmly fixed.

[0047] This application ensures the spacing accuracy between the collimating lenses 2 by using a high-precision glass substrate, and then adjusts the pigtails one by one to ensure the parallelism between the collimated beams, thereby solving the problem of parallelism between the output beams of the two-dimensional fiber collimator array.

[0048] This application embodiment also provides a high-precision fiber collimator array prepared by the above method, which includes: a positioning substrate 1, on which a plurality of mounting holes 11 are arrayed, and a collimating lens 2 is tightly installed in each mounting hole 11; and a fiber optic ferrule 3 is fixed in each positioning hole, the outer diameter of the fiber optic ferrule 3 being smaller than the inner diameter of the mounting hole 11.

[0049] The high-precision fiber collimator array provided in this embodiment can be fabricated using the method provided in any of the above embodiments and achieve the corresponding functions, which will not be elaborated here.

[0050] Preferably, in this embodiment, the fiber optic ferrule 3 can be fixed to the positioning hole with adhesive, wherein the adhesive is preferably an adhesive with a refractive index that is close to that of the fiber optic ferrule 3.

[0051] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0052] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0053] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for fabricating a high-precision fiber collimator array, characterized in that, It includes the following steps: A collimating lens (2) is installed in the mounting holes (11) arranged in an array on the positioning substrate (1). Insert the fiber optic ferrule (3) into the mounting hole (11) and move the fiber optic ferrule (3) radially along the mounting hole (11) so that all collimated beams are parallel to each other; wherein the outer diameter of the fiber optic ferrule (3) is smaller than the inner diameter of the mounting hole (11); All fiber optic pins (3) are fixed in the mounting holes (11) to form a high-precision fiber optic collimator array.

2. The method for preparing a high-precision fiber collimator array as described in claim 1, characterized in that, The step of inserting the fiber optic ferrule (3) into the mounting hole (11) and moving the fiber optic ferrule (3) radially along the mounting hole (11) includes: Insert the fiber optic ferrule (3) into the mounting hole (11) and move the fiber optic ferrule (3) up or down in the mounting hole (11).

3. The method for preparing a high-precision fiber collimator array as described in claim 1, characterized in that, The step of inserting the fiber optic ferrule (3) into the mounting hole (11) and moving the fiber optic ferrule (3) radially along the mounting hole (11) to make all collimated beams parallel to each other includes: The fiber optic ferrule (3) is moved radially along the mounting hole (11), and the coupling loss between the fiber optic ferrule (3) and the collimating lens (2) and the reference collimator (4) is monitored to determine whether each collimated beam is adjusted to a horizontal state.

4. The method for preparing a high-precision fiber collimator array as described in claim 3, characterized in that, The radial movement of the fiber optic ferrule (3) along the mounting hole (11) and the determination of whether each collimated beam is adjusted to a horizontal state by monitoring the coupling loss between the fiber optic ferrule (3) and the collimating lens (2) and the reference collimator (4) include: Adjust the relative position of the reference collimator (4) and the positioning substrate (1) so that the reference collimator (4) is aligned with one of the collimating lenses (2) along the axial direction. Move the fiber optic ferrule (3) corresponding to the collimating lens (2) radially along the mounting hole (11) until the coupling loss between the fiber optic ferrule (3) and the collimating lens (2) and the reference collimator (4) is minimized. At this time, the collimated beam is adjusted to a horizontal state. Adjust the relative position of the reference collimator (4) and the positioning substrate (1) so that the reference collimator (4) is aligned with another collimating lens (2) along the axial direction, and move the fiber optic ferrule (3) corresponding to the collimating lens (2) radially along the mounting hole (11) until the coupling loss between the fiber optic ferrule (3) and the collimating lens (2) and the reference collimator (4) is minimized. At this time, the collimated beam is adjusted to a horizontal state. Continue to adjust the relative position of the reference collimator (4) and the positioning substrate (1) and adjust the remaining fiber optic pins (3) until all collimated beams are adjusted to a horizontal state.

5. The method for preparing a high-precision fiber collimator array as described in claim 4, characterized in that, The reference collimator (4) and the positioning substrate (1) are distributed longitudinally at intervals, and the axis of the reference collimator (4) is longitudinal; adjusting the relative position of the reference collimator (4) and the positioning substrate (1) includes: Move the positioning base plate (1) or the reference collimator (4) laterally, or move the reference collimator (4) or the positioning base plate (1) vertically.

6. The method for preparing a high-precision fiber collimator array as described in claim 1, characterized in that, After mounting a collimating lens (2) in a series of mounting holes (11) on the positioning substrate (1), the following is also included: Move the fiber optic ferrule (3) along the axial direction of the mounting hole (11) to adjust the waist position of the collimated beam.

7. The method for fabricating a high-precision fiber collimator array as described in claim 1, characterized in that, The process of fixing all the fiber optic ferrules (3) to the mounting holes (11) to form a high-precision fiber optic collimator array includes: A high-precision fiber collimator array is formed by filling the gap between the fiber optic ferrule (3) and the mounting hole (11) and the gap between the fiber optic ferrule (3) and the collimating lens (2) with glue and curing it.

8. The method for preparing a high-precision fiber collimator array as described in claim 7, characterized in that, The process of filling the gaps between the fiber optic ferrule (3) and the mounting hole (11) and between the fiber optic ferrule (3) and the collimating lens (2) with glue and then curing it to form a high-precision fiber optic collimator array includes: After filling the gap between the fiber optic ferrule (3) and the mounting hole (11) and the gap between the fiber optic ferrule (3) and the collimating lens (2) with glue, the glue is first pre-cured and then heated to cure, forming a high-precision fiber optic collimator array.

9. The method for preparing a high-precision fiber collimator array as described in claim 1, characterized in that, The mounting hole (11) passes through the two opposite surfaces of the positioning substrate (1) along the axial direction of the collimating lens (2), and the fiber optic ferrule (3) and the collimating lens (2) are both inserted into the mounting hole (11).

10. A high-precision fiber collimator array prepared by the method as described in claim 1, characterized in that, It includes: Positioning substrate (1), on which a plurality of mounting holes (11) are arranged in an array, and a collimating lens (2) is tightly fitted in each mounting hole (11); Each of the positioning holes is also fixed with an optical fiber pin (3), the outer diameter of which is smaller than the inner diameter of the mounting hole (11).

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