Polarization measurement device and system for optical fiber

Abstract

The invention provides a polarization measurement device and system for an optical fiber, and the device comprises a housing which is provided with a bottom plate; the measuring part is positioned at the first end of the bottom plate in the shell; the driving part is located at the second end of the bottom plate in the shell and connected with the driving part, and the first end is opposite to the second end; and the control part is connected with the driving part and controls the driving part to rotate so as to drive the measuring part to rotate by a preset angle to complete polarization measurement of light. Under the control of the control part, the driving part rotates to drive the measuring part to rotate at the preset angle, so that the accuracy of spectral polarization information obtained through detection is improved, and the rotating angle of the measuring part can be conveniently and flexibly controlled.

Description

Technical Field

[0001] The invention belongs to the technical field of optical fiber measurement, and in particular relates to a polarization measurement device and system for optical fiber. Background Art

[0002] Polarization is one of the basic physical properties of light and contains information that intensity-based sensors ignore. The traditional approach to polarization measurement is to build an optical path that contains a large number of polarization-sensitive optical components (such as polarizers, wave plates, etc.), measure the optical power after passing through each component, calculate the corresponding Stokes parameters, and thus determine the polarization state.

[0003] The classic method for measuring polarization states uses a linear polarizer and a fixed quarter-wave plate. First, only the linear polarizer is inserted into the optical path, and the output power is recorded when the transmission axis is horizontal, vertical, and +45°. The first three Stokes parameters are calculated based on this. A quarter-wave plate with the fast axis along the horizontal direction is inserted in front of the +45° linear polarizer, and the output power is measured to obtain the fourth Stokes parameter.

[0004] Although this method is very simple, the number of measurements is very small, and any error in the measurement will have a huge impact on the result. Currently, the adjustment of the polarization angle in the experiment is done manually, and the movement of the optical element has a certain impact on the power measurement. Manual operation leads to low measurement accuracy and low repeatability, which will lead to test uncertainty and increase the experimental cycle. Summary of the invention

[0005] The present invention provides a polarization measurement device and system for optical fiber, which can solve the problem that errors in any measurement will have a huge impact on the results. At present, the adjustment of the polarization angle in experiments is performed manually, and the movement of optical elements has a certain impact on the power measurement. Manual operation leads to low measurement accuracy and low repeatability, which will lead to test uncertainty and increase the experimental cycle.

[0006] The technical solution provided by the present invention is as follows: In one aspect, a polarization measurement device for an optical fiber is provided, comprising: A housing having a bottom plate; A measuring part, located at a first end of the bottom plate in the housing; A driving part, a second end of which is located on the bottom plate in the housing and connected to the driving part, wherein the first end is opposite to the second end; The control unit is connected to the driving unit, controls the driving unit to rotate and then drives the measuring unit to rotate at a preset angle to complete the polarization measurement of light.

[0007] In an optional embodiment, the measuring part includes a driven wheel, a polarizing plate fixture, a polarizing plate, and an optical fiber installation position; The driven wheel is arranged around the optical fiber installation position; The polarizing plate fixture is located at the gap between the driven wheel and the optical fiber installation position; The polarizer is arranged at the polarizer fixture; The driven wheel is connected to the driving part to drive the polarizing plate fixture to rotate under the rotation of the driving part.

[0008] In an optional embodiment, the central axis of the polarizer fixture is parallel to the central axis of the optical fiber installation position.

[0009] In an optional embodiment, a groove is provided between the driven wheel and the optical fiber installation position, and the polarizer clamp is located in the groove.

[0010] In an optional embodiment, the measuring part further includes a first support seat, the first support seat is arranged on the base plate, and the driven wheel is rotatably arranged on the first support seat.

[0011] In an optional embodiment, a first connecting hole is opened on the bottom plate, and the first supporting seat is connected to the bottom plate through the first connecting hole.

[0012] In an optional embodiment, the driving part includes a second support seat, a driving motor and a driving wheel; The second support seat is arranged on the bottom plate; the driving motor is connected to the driving wheel, the driving wheel is rotatably arranged on the second support seat, the driving wheel is meshed with the driven wheel, and the driving wheel rotates to drive the driven wheel to rotate.

[0013] In an optional embodiment, a second connecting hole is opened on the bottom plate, and the second supporting seat is connected to the bottom plate through the second connecting hole.

[0014] On the other hand, a polarization measurement system for optical fiber is provided, the system comprising any of the above-mentioned devices, the system comprising: Get the deviation angle of the optical fiber measurement; Based on the polarization angle, the control unit controls the driving unit to rotate, thereby driving the measuring unit to rotate, so that the measuring unit stops at a preset position, which corresponds to the polarization angle of the optical fiber measurement; and the measuring unit measures the polarization amount of the light based on the preset position.

[0015] The optical fiber polarization measurement device provided by the embodiment of the present invention has at least the following beneficial effects: The optical fiber polarization measurement device provided in the embodiment of the present invention is connected to the driving part through the control part, which controls the rotation of the driving part and drives the measuring part to rotate at a preset angle to complete the polarization measurement of light. Under the control of the control part, the driving part rotates to drive the measuring part to rotate at a preset angle, thereby improving the accuracy of the detected spectral polarization information and conveniently and flexibly controlling the rotation angle of the measuring part 2. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other objects, features and advantages of the present disclosure will become more apparent through a more detailed description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present disclosure.

[0017] Figure 1 A schematic structural diagram of a polarization measurement device for optical fiber is shown.

[0018] Wherein, the accompanying drawings are marked as follows: 1-base plate, 2-measuring part, 21-driven wheel, 22-polarizer fixture, 23-optical fiber installation position, 3-driving part, 31-driving motor, 32-driving wheel. DETAILED DESCRIPTION

[0019] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0020] As used herein, the term "including" and its variations mean open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "based at least in part on". The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0021] See also Figure 1 On the one hand, an embodiment of the present invention provides a polarization measurement device for optical fiber, which includes: a shell, a measuring part 2, a driving part 3 and a control part; wherein the shell has a bottom plate 1; the measuring part 2 is located at a first end on the bottom plate 1 inside the shell; the driving part 3 is located at a second end on the bottom plate 1 inside the shell, connected to the driving part 3, and the first end is opposite to the second end; the control part is connected to the driving part 3, controls the driving part 3 to rotate, and then drives the measuring part 2 to rotate a preset angle to complete the polarization measurement of light.

[0022] The optical fiber polarization measurement device provided in the embodiment of the present invention is connected to the driving part 3 through the control part, which controls the driving part 3 to rotate and then drives the measuring part 2 to rotate at a preset angle to complete the polarization measurement of light. Under the control of the control part, the driving part 3 rotates to drive the measuring part 2 to rotate at a preset angle, thereby improving the accuracy of the detected spectral polarization information and conveniently and flexibly controlling the rotation angle of the measuring part 2.

[0023] It should be noted that the measuring device provided in the embodiment of the present invention is based on the fact that both the measuring part 2 and the driving part 3 are located in the shell, so the specific shape of the shell is not shown in the figure, and only the bottom plate 1 of the shell is retained, that is, the shell also includes a shell that surrounds the driving part 3 and the measuring part 2, and a storage space is formed between the shell and the bottom plate 1, and the driving part 3 and the measuring part 2 are located in the storage space. In addition, the control part is not shown in the figure, and illustratively, the control part can be a PLC controller.

[0024] In an optional embodiment, the measuring part 2 includes a driven wheel 21, a polarizing plate fixture 22, a polarizing plate, and an optical fiber installation position 23; the driven wheel 21 is arranged around the optical fiber installation position 23; the polarizing plate fixture 22 is located at the gap between the driven wheel 21 and the optical fiber installation position 23; the polarizing plate is arranged at the polarizing plate fixture 22; the driven wheel 21 is connected to the driving part 3 to drive the polarizing plate fixture 22 to rotate under the rotation of the driving part 3. It should be noted that the optical fiber installation position 23 in the measuring part 2 does not rotate with the rotation of the driven wheel 21, and the driven wheel 21 is used to drive the polarizing plate to rotate at a preset angle, and the optical fiber installation position 23 remains stationary, thereby measuring the polarization information of the light at the preset angle.

[0025] In an optional embodiment, the polarizing plate fixture 22 may be embedded in the driven wheel 21 , and an opening is provided on one side of the driven wheel 21 , through which the polarizing plate may be installed and removed.

[0026] In an optional embodiment, a groove is provided between the driven wheel 21 and the optical fiber installation position 23, and the polarizing plate fixture 22 is located in the groove.

[0027] Furthermore, the groove may be a rectangular groove, and the polaroid clamp may be a rectangular clamp, such as a first clamp and a second clamp arranged opposite to each other, the first clamp and the second clamp are located in the groove, and the polaroid is located between the first clamp and the second clamp. Since the first clamp and the second clamp are located in the groove and the position of the groove is fixed, the position of the polaroid remains fixed, and the polaroid will not be displaced, thereby ensuring the accuracy of the measurement. The specific shapes of the first clamp and the second clamp are not shown in the figure.

[0028] In an optional embodiment, the central axis of the polarizer fixture 22 is parallel to the central axis of the optical fiber installation position 23 .

[0029] In an optional embodiment, the measuring part 2 further includes a first support seat, the first support seat is arranged on the base plate 1, and the driven wheel 21 is rotatably arranged on the first support seat. It should be noted that since the driven wheel 21 is arranged on the first support seat, the position of the first support seat is not shown in the figure.

[0030] The driven wheel 21 and the first support seat are rotatably arranged. Exemplarily, the driven wheel 21 can be sleeved on the first support seat to ensure that the driven wheel 21 can rotate along the first support seat.

[0031] In an optional embodiment, a first connecting hole is opened on the base plate 1, and the first supporting seat is connected to the base plate 1 through the first connecting hole.

[0032] For example, the first connection hole may be a bolt hole, and the first support seat may be connected to the bottom plate 1 by bolts. The number of the bolt holes may be 2 or 4.

[0033] In an optional embodiment, the driving part 3 includes a second support seat, a driving motor 31 and a driving wheel 32; the driving motor 31 is connected to the driving wheel 32, and the second support seat is arranged on the bottom plate 1; the driving wheel 32 is rotatably arranged on the second support seat, the driving wheel 32 is meshed with the driven wheel 21, and the driving wheel 32 rotates to drive the driven wheel 21 to rotate. Similarly, since the driving wheel 32 is arranged on the second support seat, the position of the second support seat is not shown in the figure.

[0034] The driving wheel 32 and the second support seat are rotatably arranged. For example, the driving wheel 32 can be sleeved on the second support seat to ensure that the driven wheel 21 can rotate along the second support seat.

[0035] In an optional embodiment, a second connecting hole is opened on the bottom plate 1, and the second supporting seat is connected to the bottom plate 1 through the second connecting hole.

[0036] For example, the second connection hole may be a bolt hole, and the second support seat may be connected to the bottom plate 1 by bolts. The number of the bolt holes may be 2 or 4.

[0037] On the other hand, a polarization measurement system for optical fiber is also provided, the system includes any of the above-mentioned devices, and the system includes: obtaining the polarization angle of optical fiber measurement; based on the polarization angle, the control unit controls the driving unit 3 to rotate, thereby driving the measuring unit 2 to rotate, so that the measuring unit 2 stops at a preset position, and the preset position corresponds to the polarization angle of optical fiber measurement; and the measuring unit 2 at the preset position measures the polarization amount of light.

[0038] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A polarization measurement device for optical fiber, characterized in that: include: A housing having a bottom plate; A measuring part, located at a first end of the bottom plate in the housing; A driving part, a second end of which is located on the bottom plate in the housing and connected to the driving part, wherein the first end is opposite to the second end; A control unit connected to the driving unit, controlling the driving unit to rotate and thereby driving the measuring unit to rotate by a preset angle to complete the polarization measurement of light; The measuring part includes a driven wheel, a polarizing plate fixture, a polarizing plate and an optical fiber installation position; The driven wheel is arranged around the optical fiber installation position; The polarizing plate fixture is located at the gap between the driven wheel and the optical fiber installation position; The polarizer is arranged at the polarizer fixture; The driven wheel is connected to the driving part to drive the polarizing plate fixture to rotate under the rotation of the driving part; A groove is arranged between the driven wheel and the optical fiber installation position, and the polarizing plate fixture is located in the groove.

2. The optical fiber polarization measurement device according to claim 1, characterized in that: The central axis of the polarizing plate fixture is parallel to the central axis of the optical fiber installation position.

3. The optical fiber polarization measurement device according to claim 1, characterized in that: The measuring part further comprises a first supporting seat, wherein the first supporting seat is arranged on the bottom plate, and the driven wheel is rotatably arranged on the first supporting seat.

4. The optical fiber polarization measuring device according to claim 3, characterized in that: The bottom plate is provided with a first connection hole, and the first support seat is connected to the bottom plate through the first connection hole.

5. The optical fiber polarization measurement device according to claim 1, characterized in that: The driving part includes a second supporting seat, a driving motor and a driving wheel; The second support seat is arranged on the bottom plate; the driving motor is connected to the driving wheel, the driving wheel is rotatably arranged on the second support seat, the driving wheel is meshed with the driven wheel, and the driving wheel rotates to drive the driven wheel to rotate.

6. The optical fiber polarization measurement device according to claim 5, characterized in that: The bottom plate is provided with a second connection hole, and the second support seat is connected to the bottom plate through the second connection hole.

7. A polarization measurement system for optical fiber, characterized in that: The system comprises the device according to any one of claims 1 to 6, and the system comprises: Get the deviation angle of the optical fiber measurement; Based on the polarization angle, the control unit controls the driving unit to rotate, thereby driving the measuring unit to rotate, so that the measuring unit stops at a preset position, which corresponds to the polarization angle of the optical fiber measurement; and the measuring unit measures the polarization amount of the light based on the preset position.

Images