Angle matching method, system, medium and program product for dual-tail collimator and polarized light beam combiner

Abstract

The application provides a kind of double tail collimator and the angle matching method, system, medium and program product of polarized light beam combiner, wherein the method comprises: coupling first channel and second channel of double tail collimator by single tail collimator respectively, by collecting optical power, confirming the first single tail collimator coordinate of unit collimator when single tail collimator and the first channel of double tail collimator are coupled under minimum loss, and confirming the second single tail collimator coordinate of unit collimator when single tail collimator and the second channel of double tail collimator are coupled under minimum loss, to calculate the target light-emitting angle, the target angle of polarized light beam combiner.The application does not need to measure each optical power frequently by changing the angle of double tail collimator and polarized light beam combiner, improves the angle matching efficiency between double tail collimator and polarized light beam combiner, and simultaneously, the application is simple in implementation, and is convenient to apply.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical passive device manufacturing, in particular to a method, system, medium and program product for angle matching of a double-tail collimator and a polarization beam combiner. BACKGROUND

[0002] An optical passive device is a general term for optical functional devices without optical energy, which includes a double-tail collimator and a polarization beam combiner. The double-tail collimator is an optical passive device used for optical signal input and output in fiber communication devices, which is formed by precise positioning of a tail fiber and a lens, and can convert the transmission light in an optical fiber into collimated light (parallel light), or couple external (approximately parallel light) light into a single-mode optical fiber. The main function of the polarization beam combiner is to combine two linearly polarized lights with orthogonal polarization directions into one.

[0003] In the production of optical passive devices, devices that involve multiple light inputs and one light output are often implemented by adjusting the angles of the double-tail collimator and the polarization beam combiner, and using the polarization beam combiner to combine multiple lights with different angles emitted from the double-tail collimator into one light. The angle between the double-tail collimator and the polarization beam combiner determines the final output effect of the polarization beam combiner, so angle matching of the double-tail collimator and the polarization beam combiner is required.

[0004] One existing angle matching method for the double-tail collimator and the polarization beam combiner involves detecting the light power of each incident light and the light power of the combined light after matching the angles of the two, and then determining the current angle matching effect of the double-tail collimator and the polarization beam combiner according to the relationship between the measured light powers. This method requires repeated measurement of the light powers after each change of the angles of the double-tail collimator and the polarization beam combiner, which is tedious and requires high debugging skills, resulting in a long matching process and low matching efficiency.

[0005] Another existing angle matching method for the double-tail collimator and the polarization beam combiner involves keeping the polarization beam combiner fixed and constantly rotating the double-tail collimator until the two light paths are displayed at the same position on the display, and then stopping the rotation. This method requires the use of a light spot position sensor and a display, which is complex to set up and costly. SUMMARY

[0006] The first object of the present application is to provide an angle matching method for a double-tail collimator and a polarization beam combiner with high matching efficiency and easy implementation.

[0007] The second object of the present application is to provide a system for implementing the above-mentioned angle matching method for a double-tail collimator and a polarization beam combiner.

[0008] In order to achieve the above-mentioned first purpose, the application provides an angle matching method of a double-tail collimator and a polarized light beam combiner, which comprises the following steps: obtaining a first light power corresponding to a single-tail collimator, controlling a first channel of the single-tail collimator and the double-tail collimator to continuously perform a first coupling operation until a first coupling loss is a first preset minimum value, and recording a first single-tail collimator coordinate; the single-tail collimator is connected to a light source module and is used for collimating input light obtained from the light source module and then outputting the collimated light; wherein the first coupling operation comprises: adjusting a coupling position of the single-tail collimator relative to the first channel, obtaining a second light power corresponding to the first channel; taking the first light power as a reference, calculating the first coupling loss by using the first light power and the second light power; judging whether the first coupling loss is the first preset minimum value; obtaining a third light power corresponding to the single-tail collimator, controlling a second channel of the single-tail collimator and the double-tail collimator to continuously perform a second coupling operation until a second coupling loss is a second preset minimum value, and recording a second single-tail collimator coordinate; wherein the second coupling operation comprises: adjusting a coupling position of the single-tail collimator relative to the second channel, obtaining a fourth light power corresponding to the second channel; taking the third light power as a reference, calculating the second coupling loss by using the third light power and the fourth light power; judging whether the second coupling loss is the second preset minimum value; and calculating a target light-out angle of the double-tail collimator according to the first single-tail collimator coordinate and the second single-tail collimator coordinate, wherein the target light-out angle is a target angle of the polarized light beam combiner matched with the double-tail collimator.

[0009] As can be seen from the above scheme, the single-tail collimator is coupled with the first channel and the second channel of the double-tail collimator respectively, the first single-tail collimator coordinate of the unit collimator when the single-tail collimator and the first channel of the double-tail collimator are coupled at the minimum loss is confirmed, the second single-tail collimator coordinate of the unit collimator when the single-tail collimator and the second channel of the double-tail collimator are coupled at the minimum loss is confirmed, and then the target light-out angle is calculated, which is the target angle of the polarized light beam combiner. The target light-out angle is directly calculated at the minimum insertion loss of the two channels of the double-tail collimator by the single-tail collimator and the double-tail collimator, so that the angle of the polarized light beam combiner matched with the double-tail collimator is obtained, thereby it is not necessary to frequently change the angle of the double-tail collimator and the polarized light beam combiner and then repeatedly measure each light power, the angle matching efficiency between the double-tail collimator and the polarized light beam combiner is improved, and meanwhile, the application has a simple implementation and is convenient to apply.

[0010] Further, the first single-tail collimator coordinate is (θ1, Ω1), the second single-tail collimator coordinate is (θ2, Ω2), and the target light-out angle W is arccos[cos(θ1+θ2)*cos(Ω1+Ω2)].

[0011] Further, the first optical power, the second optical power, the third optical power and the fourth optical power are absolute values.

[0012] In order to achieve the second purpose, the application provides a system for angle matching between a double-tail collimator and a polarized light beam combiner, which comprises a control module, a coupling platform, a light source module and an optical power meter, and the coupling platform is provided with a single-tail collimator, a double-tail collimator and a driving mechanism; the control module is connected with the driving mechanism and the optical power meter respectively; the driving mechanism is connected with the single-tail collimator, and the light source module is connected with the single-tail collimator; the driving mechanism is used for driving the coupling between the first channel of the double-tail collimator or the second channel of the double-tail collimator; the optical power meter is connected with the single-tail collimator, the first channel and the second channel respectively; and the control module executes the angle matching method between the double-tail collimator and the polarized light beam combiner.

[0013] As can be seen from the above solutions, the system of the application has simple structure, does not need to be provided with a light spot position sensor and a display, has lower cost and is easier to maintain.

[0014] Further, the control module is a personal computer.

[0015] Therefore, the method is more convenient to implement.

[0016] Further, the control module is connected with the light source module.

[0017] Therefore, the output of the light source module can be conveniently controlled by the control module.

[0018] In order to achieve the third purpose, the application provides a computer readable storage medium, which stores a computer program, wherein the computer program is executed by a processor to implement the angle matching method between the double-tail collimator and the polarized light beam combiner.

[0019] In order to achieve the fourth purpose, the application provides a computer program product, which comprises computer instructions, wherein the computer instructions are executed by a processor to implement the angle matching method between the double-tail collimator and the polarized light beam combiner. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a system framework diagram of an embodiment of the system for angle matching between a double-tail collimator and a polarized light beam combiner.

[0021] Figure 2 is a flowchart of an embodiment of the angle matching method between a double-tail collimator and a polarized light beam combiner.

[0022] The application will be further described below in combination with the drawings and embodiments. DETAILED DESCRIPTION

[0023] A system embodiment of angle matching between a double-tail collimator and a polarized light combiner

[0024] Referring to Figure 1 , the embodiment includes a control module 11, an optical power meter 12, a light source module 13, and a coupling platform 14, and the coupling platform 14 is provided with a single-tail collimator 141, a double-tail collimator 142, and a driving mechanism 143.

[0025] The control module 11 is connected to the optical power meter 12 and the driving mechanism 143, respectively. In the embodiment, the control module 11 is a personal computer.

[0026] The optical power meter 12 is connected to the single-tail collimator 141, the first channel of the double-tail collimator 142, and the second channel of the double-tail collimator 142, respectively, for detecting the optical power of the single-tail collimator 141, the first channel of the double-tail collimator 142, and the second channel of the double-tail collimator 142.

[0027] The light source module 13 is connected to the single-tail collimator 141, and the single-tail collimator 141 is used to collimate and beam the laser output by the light source module 13 and output to the first channel or the second channel of the double-tail collimator 142.

[0028] The driving mechanism 143 is connected to the single-tail collimator 141, and the driving mechanism 143 is used to drive the single-tail collimator 141 to couple with the first channel or the second channel of the double-tail collimator 142 under the control of the control module 11. The double-tail collimator 142 is fixed on the coupling platform 14 by a clamp.

[0029] A method embodiment of angle matching between a double-tail collimator and a polarized light combiner

[0030] The embodiment is realized based on the above-mentioned system of angle matching between a double-tail collimator and a polarized light combiner, and is realized by executing a computer program by a control module, referring to Figure 2 , and includes the following steps:

[0031] S1: Obtain a first optical power corresponding to a unit collimator.

[0032] The single-tail collimator is placed in an optical fiber clamp and inserted into a channel one of the optical power meter, and the laser output by the light source module can be output to the optical power meter through the single-tail collimator, so that the first optical power corresponding to the single-tail collimator can be obtained.

[0033] S2: Adjust the coupling position of the single-tail collimator relative to the first channel, and obtain a second optical power corresponding to the first channel.

[0034] The control unit resets the coupling axis on which the collimator is located to zero (the state of horizontal and vertical), and then outputs a coupling instruction to control the driving mechanism to drive the coupling axis, so that the single-tail collimator is moved to a position that can be coupled with the first channel of the double-tail collimator. After the single-tail collimator is coupled with the first channel of the double-tail collimator, the laser output by the light source module is sequentially output to the first channel of the optical power meter through the single-tail collimator and the first channel of the double-tail collimator, and the second optical power corresponding to the first channel is obtained by reading the optical power meter.

[0035] S3: Taking the first optical power as a reference, a first coupling loss is obtained according to the first optical power and the second optical power.

[0036] The first coupling loss is obtained by [(|first optical power|-|second optical power|) / |first optical power|].

[0037] S4: It is judged whether the first coupling loss is a first preset minimum value.

[0038] If the judgment result is yes, step S5 is continued to be executed, otherwise, step S2 is returned to adjust the coupling position of the single-tail collimator relative to the first channel, and the second optical power corresponding to the first channel is reacquired.

[0039] S5: The first single-tail collimator coordinate is recorded.

[0040] The coordinate system corresponding to the first single-tail collimator coordinate is a space spherical coordinate system with the coupling axis on which the single-tail collimator is placed being reset to zero (the state of horizontal and vertical) as the origin, and the position of the single-tail collimator in the space spherical coordinate system is (θ 1, Ω1) at this time. Because the angle axis only swings in the horizontal direction and the vertical direction alternately in the coupling process, only the above two directions need to be considered in practice; wherein θ1 is the angle of the coupling axis swinging in the vertical direction, and the value thereof is calculated in the manner of the angle step value corresponding to the single-pulse signal in the vertical direction * the single-pulse number after the coupling is finished; Ω1 is the angle of the coupling axis swinging in the horizontal direction, and the value thereof is calculated in the manner of the angle step value corresponding to the single-pulse signal in the horizontal direction * the single-pulse number after the coupling is finished; θ1 and Ω1 are greater than or equal to 0, and (θ1, Ω1) describes the angle of the single-tail collimator swinging after the coupling is finished. Because the length of the coupling axis is unchanged in the coupling process, r in the spherical coordinate (r, θ1, Ω1) is a constant value; the first unit collimator coordinate can be simplified as (θ1, Ω1).

[0041] S6: A third optical power corresponding to the single-tail collimator is obtained.

[0042] The single tail collimator is placed in the optical fiber clamp and inserted into the second channel of the optical power meter. The laser output by the light source module can pass through the single tail collimator and be output into the optical power meter, so that the third optical power corresponding to the single tail collimator can be obtained.

[0043] S7: Adjust the coupling position of the single tail collimator relative to the second channel to obtain the fourth optical power corresponding to the second channel.

[0044] The coupling axis where the unit collimator is located is reset to the zero point (horizontal and vertical state), and then the output coupling instruction is used to control the driving mechanism to drive the coupling, so that the single tail collimator is moved to a position where it can be coupled with the second channel of the double tail collimator. Then, after the single tail collimator is coupled with the second channel of the double tail collimator, the laser output by the light source module is sequentially output through the single tail collimator and the second channel of the double tail collimator to the second channel of the optical power meter, and the fourth optical power corresponding to the second channel is obtained by reading the optical power meter.

[0045] S8: Obtain the second coupling loss calculated from the third optical power and the fourth optical power.

[0046] The second coupling loss is obtained by [(| third optical power | - | fourth optical power |) / | third optical power |].

[0047] S9: Determine whether the second coupling loss is the second preset minimum value.

[0048] If the determination result is yes, step S10 is continued, otherwise, step S7 is returned to adjust the coupling position of the single tail collimator relative to the second channel to re-obtain the fourth optical power corresponding to the second channel.

[0049] S10: Record the second single tail collimator coordinates.

[0050] The coordinate system corresponding to the second single tail collimator coordinates is the same as the space spherical coordinate system in step S5. At this time, the position of the single tail collimator in the space spherical coordinate system is (θ2, Ω2), where θ2 is the angle of the coupling axis swinging in the vertical direction, and its value is calculated as the angle step value corresponding to the single pulse signal in the vertical direction multiplied by the number of single pulses after coupling. Ω2 is the angle of the coupling axis swinging in the horizontal direction, and its value is calculated as the angle step value corresponding to the single pulse signal in the horizontal direction multiplied by the number of single pulses after coupling. Both θ2 and Ω2 are greater than or equal to 0, and (θ2, Ω2) describes the angle of the single tail collimator swinging after coupling. Because the length of the coupling axis does not change during coupling, r in the spherical coordinates (r, θ2, Ω2) is a constant. The second unit collimator coordinates can be simplified as (θ2, Ω2).

[0051] S11: calculating a target light-out angle of the double-tail collimator according to the first single-tail collimator coordinate and the second single-tail collimator coordinate.

[0052] The target light-out angle can be calculated according to the target light-out angle W = arccos [cos (θ1 + θ2) * cos (Ω1 + Ω2)], and the target light-out angle is the angle of the polarization beam combiner matched with the double-tail collimator, so that the angle of the light-out angle of the double-tail collimator and the angle of the polarization beam combiner can be set according to the target light-out angle, so that the double-tail collimator can be matched with the polarization beam combiner.

[0053] In summary, the present application directly calculates the target light-out angle under the minimum insertion loss of the two channels of the double-tail collimator, so as to obtain the angle of the polarization beam combiner of the double-tail collimator, so that it is not necessary to frequently change the angle of the double-tail collimator and the polarization beam combiner and repeatedly measure each optical power, thereby improving the angle matching efficiency between the double-tail collimator and the polarization beam combiner, and the present application has simple implementation and is convenient to apply.

[0054] The computer readable storage medium embodiment:

[0055] The control module of the above embodiment, if realized in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, all or part of the process of the angle matching method of the double-tail collimator and the polarization beam combiner can also be completed by a computer program instructing related hardware, and the computer program can be stored in a computer readable storage medium. The computer program can implement the steps of the above-mentioned angle matching method of the double-tail collimator and the polarization beam combiner when executed by the controller. The computer program includes computer program code, which can be in the form of source code, object code, executable files or some intermediate forms, etc. The storage medium can include any entity or device capable of carrying computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the content contained in the computer readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction, for example, in some jurisdictions, according to legislation and patent practice, the computer readable medium does not include electric carrier signals and telecommunication signals.

[0056] The computer program product embodiment:

[0057] The computer program product of the embodiment includes computer instructions stored in a computer readable storage medium. A processor of a computer device reads the computer instructions from the computer readable storage medium, and the processor executes the computer instructions, so that the computer device executes each step of the above optical fiber coupling and post-welding method embodiment.

Claims

1. A method for angle matching between a dual-tail collimator and a polarizing beam combiner, characterized in that, Includes the following steps: Obtain the first optical power corresponding to the single-tailed collimator, control the first channel of the single-tailed collimator and the dual-tailed collimator to continuously perform the first coupling operation until the first coupling loss is the first preset minimum value, and record the coordinates of the first single-tailed collimator. The single-tail collimator is connected to the light source module and is used to collimate the input light obtained from the light source module before outputting it. The first coupling operation includes: adjusting the coupling position of the single-tail collimator relative to the first channel to obtain the second optical power corresponding to the first channel; calculating the first coupling loss based on the first optical power and the second optical power; and determining whether the first coupling loss is the first preset minimum value. Obtain the third optical power corresponding to the single-tailed collimator, control the second channel of the single-tailed collimator and the dual-tailed collimator to continuously perform the second coupling operation until the second coupling loss is the second preset minimum value, and record the coordinates of the second single-tailed collimator. The second coupling operation includes: adjusting the coupling position of the single-tail collimator relative to the second channel to obtain the fourth optical power corresponding to the second channel; using the third optical power as a reference, calculating the second coupling loss through the third optical power and the fourth optical power; and determining whether the second coupling loss is the second preset minimum value. The target emission angle of the dual-tailed collimator is calculated based on the coordinates of the first single-tailed collimator and the second single-tailed collimator. The target emission angle is the target angle of the polarization beam combiner matched with the dual-tailed collimator. The coordinates of the first single-tail collimator are (θ1, Ω1); The coordinates of the second single-tail collimator are (θ2, Ω2); The target emission angle W = arccos[cos(θ1 + θ2) * cos(Ω1 + Ω2)].

2. The angle matching method for the dual-tail collimator and polarization beam combiner as described in claim 1, characterized in that: The first optical power, the second optical power, the third optical power, and the fourth optical power are all absolute values.

3. An angle matching system for a dual-tail collimator and a polarizing beam combiner, characterized in that, include: The system includes a control module, a coupling platform, a light source module, and an optical power meter. The coupling platform is equipped with the single-tail collimator, the double-tail collimator, and a drive mechanism. The control module is connected to the drive mechanism and the optical power meter respectively; The driving mechanism is connected to the single-tail collimator, the light source module is connected to the single-tail collimator, and the driving mechanism is used to drive the single-tail collimator to couple with the first channel of the double-tail collimator or the second channel of the double-tail collimator. The optical power meter is connected to the single-tail collimator, the first channel, and the second channel, respectively. The control module executes the angle matching method of the dual-tail collimator and polarization beam combiner as described in claim 1 or 2.

4. The angle matching system of the dual-tail collimator and polarization beam combiner as described in claim 3, characterized in that: The control module is a personal computer.

5. The angle matching system for the dual-tail collimator and polarization beam combiner as described in claim 3, characterized in that: The control module is connected to the light source module.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor, it implements the angle matching method of the dual-tail collimator and polarization beam combiner as described in claim 1 or 2.

7. A computer program product comprising computer instructions, characterized in that: When the computer instructions are executed by the processor, they implement the angle matching method of the dual-tail collimator and polarization beam combiner as described in claim 1 or 2.

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