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

Abstract

The invention provides an angle matching method and system for a double-tail collimator and a polarized light beam combiner, a medium and a program product, and the method comprises the steps: enabling a single-tail collimator to be coupled with a first channel and a second channel of the double-tail collimator, a first single-tail collimator coordinate of a unit collimator when a single-tail collimator is coupled with a first channel of a double-tail collimator under the minimum loss is confirmed by collecting optical power, and a second single-tail collimator coordinate of the unit collimator when the single-tail collimator is coupled with a second channel of the double-tail collimator under the minimum loss is confirmed. And calculating to obtain a target light emitting angle which is the target angle of the polarized light beam combiner. According to the invention, each optical power does not need to be measured frequently by changing the angles of the double-tail collimator and the polarized light beam combiner, the angle matching efficiency between the double-tail collimator and the polarized light beam combiner is improved, and meanwhile, the method is simple in implementation mode and convenient to apply.

Description

Technical Field

[0001] The present invention relates to the technical field of optical passive device manufacturing, and in particular to an angle matching method, system, medium and program product of a double-tail collimator and a polarized light combiner. Background Art

[0002] Optical passive devices are a general term for optical functional devices that do not contain optical energy sources, including double-tail collimators and polarization beam combiners. Double-tail collimators are optical passive devices used for optical signal input and output in optical fiber communication devices. They are made of precisely positioned pigtails and lenses, and can convert the transmission light in the optical fiber into collimated light (parallel light), or couple external (approximately parallel light) light into a single-mode optical fiber. The main function of a polarization beam combiner is to combine two linearly polarized light beams with orthogonal polarization directions into one beam.

[0003] When producing optical passive devices, there are devices that have multiple light inputs and one light output. The implementation principle is often to adjust the angle between the double-tail collimator and the polarization beam combiner, and use the polarization beam combiner to combine multiple light beams with different angles emitted from the double-tail collimator into one light beam. The angle between the double-tail collimator and the polarization beam combiner determines the final output effect of the polarization beam combiner, so it is necessary to match the angle of the double-tail collimator and the polarization beam combiner.

[0004] An existing angle matching method for a double-tail collimator and a polarized light beam combiner is to detect the optical power of each incident light and the optical power of the combined light after matching the angles of the two, and then judge the beam combining effect of the double-tail collimator and the polarized light beam combiner at the current angle based on the relationship between the measured optical powers. This method requires repeated measurement of each optical power after each change of the angle between the double-tail collimator and the polarized light beam combiner. The steps are cumbersome and require the debugging personnel to have high debugging capabilities, which results in a long matching process and low matching efficiency.

[0005] Another existing method for angle matching between a double-tail collimator and a polarization beam combiner is to keep the polarization beam combiner fixed and continuously rotate the double-tail collimator until the two light paths finally display the same spot on the display. This method requires the setting of a spot position sensor and a display, which is complex to set up and has a high cost. Summary of the invention

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

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

[0008] In order to achieve the above-mentioned first purpose, the present invention provides a method for angle matching of a double-tail collimator and a polarization beam combiner, which includes the following steps: obtaining a first optical power corresponding to the single-tail collimator, controlling the first channels of the single-tail collimator and the double-tail collimator to continuously perform a first coupling operation until the first coupling loss is a first preset minimum value, and recording the coordinates of the first single-tail collimator; the single-tail collimator is connected to a light source module to collimate the input light obtained from the light source module and then output it; wherein the first coupling operation includes: adjusting the coupling position of the single-tail collimator relative to the first channel to obtain a second optical power corresponding to the first channel; taking the first optical power as a reference, calculating the first coupling loss by the first optical power and the second optical power; judging whether the first coupling loss is whether it is the first preset minimum value; obtaining the third optical power corresponding to the single-tail collimator, controlling the second channels of the single-tail collimator and the double-tail collimator to continue the second coupling operation until the second coupling loss is the second preset minimum value, and recording the second single-tail collimator coordinates; wherein the second coupling operation includes: adjusting the coupling position of the single-tail collimator relative to the second channel, obtaining the fourth optical power corresponding to the second channel; taking the third optical power as a reference, calculating the second coupling loss by the third optical power and the fourth optical power; judging whether the second coupling loss is the second preset minimum value; and calculating the target light output angle of the double-tail collimator according to the first single-tail collimator coordinates and the second single-tail collimator coordinates, the target light output angle being the target angle of the polarization beam combiner matched with the double-tail collimator.

[0009] As can be seen from the above scheme, the present invention couples the single-tail collimator with the first channel and the second channel of the double-tail collimator respectively, and confirms the first single-tail collimator coordinates of the unit collimator when the single-tail collimator is coupled with the first channel of the double-tail collimator at the minimum loss by collecting optical power, and confirms the second single-tail collimator coordinates of the unit collimator when the single-tail collimator is coupled with the second channel of the double-tail collimator at the minimum loss, thereby calculating the target light output angle, which is the target angle of the polarization beam combiner. The present invention directly calculates the target light output angle when the insertion loss of the two channels of the double-tail collimator is minimum through the cooperation of the single-tail collimator and the double-tail collimator, thereby obtaining the angle of the polarization beam combiner of the double-tail collimator, thereby eliminating the need to repeatedly measure each optical power after frequently changing the angle between the double-tail collimator and the polarization beam combiner, thereby improving the angle matching efficiency between the double-tail collimator and the polarization beam combiner. At the same time, the present invention is simple to implement and convenient to use.

[0010] A further solution is that the coordinates of the first single-end collimator are (θ1, Ω1); the coordinates of the second single-end collimator are (θ2, Ω2); and the target light output angle W = arccos[cos(θ1+θ2)*cos(Ω1+Ω2)].

[0011] A further solution is that the first optical power, the second optical power, the third optical power and the fourth optical power are all absolute values.

[0012] In order to achieve the above-mentioned second purpose, the present invention provides an angle matching system for a double-tail collimator and a polarization light combiner, which includes: an angle matching system for a double-tail collimator and a polarization light combiner, which includes: a control module, a coupling platform, a light source module, and an optical power meter, wherein a single-tail collimator, a double-tail collimator and a driving mechanism are arranged on the coupling platform; the control module is respectively connected to the driving mechanism and the optical power meter; 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 respectively connected to the single-tail collimator, the first channel, and the second channel; the control module executes the above-mentioned angle matching method for the double-tail collimator and the polarization light combiner.

[0013] It can be seen from the above scheme that the system structure of the present invention is simple, does not need to set up a light spot position sensor and a display, has lower cost and is easier to maintain.

[0014] A further solution is that the control module is a personal computer.

[0015] This shows that it can be more convenient to implement.

[0016] A further solution is that the control module is connected to the light source module.

[0017] It can be seen that the output of the light source module can be conveniently controlled through the control module.

[0018] In order to achieve the third purpose mentioned above, the present invention provides a computer-readable storage medium, on which a computer program is stored, wherein: when the computer program is executed by a processor, the angle matching method of the double-tail collimator and the polarization beam combiner is implemented.

[0019] In order to achieve the fourth objective mentioned above, the present invention provides a computer program product, including computer instructions, wherein: when the computer instructions are executed by a processor, the angle matching method of the double-tail collimator and the polarization beam combiner mentioned above is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a system framework diagram of an embodiment of an angle matching system of a double-tail collimator and a polarization beam combiner of the present invention.

[0021] Figure 2 It is a flow chart of an embodiment of a method for angle matching between a double-tail collimator and a polarization beam combiner.

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0023] Angle matching system embodiment of double-tail collimator and polarization beam combiner:

[0024] See also Figure 1 This 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 respectively connected to the optical power meter 12 and the driving mechanism 143. In this embodiment, the control module 11 is a personal computer.

[0026] The optical power meter 12 is respectively 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 , and is used to detect 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-end collimator 141 , and the single-end collimator 141 is used to collimate and shape the laser output by the light source module 13 and then output it to the first channel or the second channel of the double-end collimator 142 .

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

[0029] Angle matching method for a double-tail collimator and a polarization beam combiner:

[0030] This embodiment is implemented based on the angle matching system of the double-tail collimator and the polarization beam combiner, which is specifically implemented by the control module executing a computer program. Figure 2 , including the following steps:

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

[0032] The single-end collimator is placed in the optical fiber clamp and inserted into channel 1 of the optical power meter. The laser output by the light source module can be output to the optical power meter through the single-end collimator, so that the first optical power corresponding to the single-end collimator can be obtained.

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

[0034] Among them, the coupling axis where the unit collimator is located is controlled to be reset, and the coupling axis is reset to zero point (horizontally and vertically), and then the coupling instruction is output to control the driving mechanism to drive the coupling axis, so as to move the single-tail collimator to a position where it 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 output to channel 1 of the optical power meter through the first channel of the single-tail collimator and the double-tail collimator in turn, 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, obtaining a first coupling loss calculated by 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: Determine whether the first coupling loss is a first preset minimum value.

[0038] If the judgment result is yes, then continue to execute step S5, otherwise return to step S2, adjust the coupling position of the single-tail collimator relative to the first channel, and re-acquire the second optical power corresponding to the first channel.

[0039] S5: Record the coordinates of the first single-tail collimator.

[0040] The coordinate system corresponding to the coordinates of the first single-tail collimator is a space spherical coordinate system with the coupling axis where the single-tail collimator is placed reset to zero (the axis is horizontal and vertical) as the origin. At this time, the position of the single-tail collimator in the space spherical coordinate system is (θ 1, Ω1), because during the coupling process, the angle axis only swings alternately in the horizontal and vertical directions, so in practice only the above two directions need to be considered; where θ1 is the angle of the coupling axis in the vertical direction, and its value is calculated as the angle step value corresponding to the single pulse signal in the vertical direction * the number of single pulses after the coupling is completed, Ω1 is the angle of the coupling axis in the horizontal direction, and its value is calculated as the angle step value corresponding to the single pulse signal in the horizontal direction * the number of single pulses after the coupling is completed; θ1 and Ω1 are both greater than or equal to 0, (θ1, Ω1) describes the angle of the single-tail collimator after the coupling is completed. Because the length of the coupling axis does not change during the coupling process, r in the spherical coordinates (r, θ1, Ω1) is a constant; the coordinates of the first unit collimator can be simplified to (θ1, Ω1).

[0041] S6: Obtain a third optical power corresponding to the single-tail collimator.

[0042] Among them, the single-end collimator is placed in the fiber clamp and inserted into the channel 2 of the optical power meter. The laser output by the light source module can be output to the optical power meter through the single-end collimator, so that the third optical power corresponding to the single-end collimator can be obtained.

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

[0044] Among them, the coupling axis where the unit collimator is located is controlled to be reset, and the coupling axis is reset to zero point (horizontally and vertically), and then the driving mechanism is controlled to drive the coupling by outputting the coupling instruction, so as to move the single-tail collimator 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 output to channel 2 of the optical power meter through the second channels of the single-tail collimator and the double-tail collimator in turn, and the fourth optical power corresponding to the second channel is obtained by reading the optical power meter.

[0045] S8: Taking the third optical power as a reference, obtaining a second coupling loss calculated by 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 a second preset minimum value.

[0048] If the judgment result is yes, then continue to execute step S10, otherwise return to step S7, adjust the coupling position of the single-tail collimator relative to the second channel, and re-acquire the fourth optical power corresponding to the second channel.

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

[0050] Among them, the coordinate system corresponding to the coordinates of the second single-tail collimator is the same as the spatial spherical coordinate system of step S5. At this time, the position of the single-tail collimator in the spatial 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 * the number of single pulses after the coupling is completed, and 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 * the number of single pulses after the coupling is completed; θ2 and Ω2 are both greater than or equal to 0, and (θ2, Ω2) describes the angle of the single-tail collimation after the coupling is completed. Because the length of the coupling axis does not change during the coupling process, r in the spherical coordinates (r, θ2, Ω2) is a constant; the coordinates of the second unit collimator can be simplified to (θ2, Ω2).

[0051] S11: Calculate the target light output angle of the double-tail collimator according to the coordinates of the first single-tail collimator and the second single-tail collimator.

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

[0053] In summary, the present invention cooperates with a single-tail collimator and a double-tail collimator to directly calculate the target light output angle when the insertion loss of the two channels of the double-tail collimator is minimized, thereby obtaining the angle of the polarization light combiner of the double-tail collimator. This eliminates the need to frequently change the angle between the double-tail collimator and the polarization light combiner and then repeatedly measure each optical power, thereby improving the angle matching efficiency between the double-tail collimator and the polarization light combiner. At the same time, the present invention is simple to implement and easy to use.

[0054] Computer readable storage medium embodiment:

[0055] If the control module of the above embodiment is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the entire or partial process of the angle matching method of the double-tail collimator and the polarization beam combiner can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the controller, the steps of the angle matching method of the double-tail collimator and the polarization beam combiner can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The storage medium may include: any entity or device capable of carrying computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical 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, computer-readable media does not include electrical carrier signals and telecommunications signals.

[0056] Computer program product embodiment:

[0057] The computer program product of this embodiment includes computer instructions, which are stored in a computer-readable storage medium. The processor of the 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-mentioned optical fiber coupling and welding method embodiment.

Claims

1. A method for angle matching between a double-tail collimator and a polarization beam combiner, characterized in that: The following steps are involved: Acquire a first optical power corresponding to the single-tail collimator, control the first channels of the single-tail collimator and the double-tail collimator to continuously perform a first coupling operation until the first coupling loss reaches a first preset minimum value, and record the coordinates of the first single-tail collimator; The single-end collimator is connected to the light source module and is used to collimate the input light obtained from the light source module and then output 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; taking the first optical power as a reference, calculating the first coupling loss through the first optical power and the second optical power; and determining whether the first coupling loss is the first preset minimum value; Acquire a third optical power corresponding to the single-tail collimator, control the second channels of the single-tail collimator and the double-tail collimator to continuously perform a second coupling operation until the second coupling loss reaches a second preset minimum value, and record the coordinates of the second single-tail 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; taking 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 light output angle of the double-tail collimator is calculated according to the coordinates of the first single-tail collimator and the second single-tail collimator, and the target light output angle is the target angle of the polarization beam combiner matched with the double-tail collimator.

2. The angle matching method of the double-tail collimator and the polarization beam combiner according to claim 1, characterized in that: The coordinates of the first single-tail collimator are (θ1, Ω1); The coordinates of the second single-tail collimator are (θ2, Ω2); The target light output angle W=arccos[cos(θ1+θ2)*cos(Ω1+Ω2)].

3. The angle matching method of the double-tail collimator and the polarization beam combiner as claimed in claim 2, characterized in that: The first optical power, the second optical power, the third optical power and the fourth optical power are all absolute values.

4. An angle matching system of a double-tail collimator and a polarization beam combiner, characterized in that: include: A control module, a coupling platform, a light source module, and an optical power meter. The coupling platform is provided with the single-tail collimator, the double-tail collimator, and a driving mechanism; The control module is respectively connected to the driving mechanism and the optical power meter; 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 respectively connected to the single-tail collimator, the first channel, and the second channel; The control module executes the angle matching method of the double-tail collimator and the polarization beam combiner as described in any one of claims 1 to 3 above.

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

6. The angle matching system of the double-tail collimator and the polarization beam combiner as claimed in claim 4, characterized in that: The control module is connected to the light source module.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the angle matching method between the double-tail collimator and the polarization beam combiner described in any one of claims 1 to 3 is implemented.

8. A computer program product comprising computer instructions, characterized in that: When the computer instructions are executed by the processor, the angle matching method of the double-tail collimator and the polarization beam combiner described in any one of claims 1 to 3 is implemented.

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