Device and method for measuring stray light on side wall of optical waveguide

Abstract

The embodiment of the invention discloses an optical waveguide side wall stray light measuring device and measuring method.The optical waveguide side wall stray light measuring device comprises a supporting part, a light source part and a detecting part, the supporting part comprises a supporting platform and a supporting rod, the supporting rod is connected with the supporting platform, and the supporting platform is used for placing an optical waveguide to be measured; the light source part is movably connected with the supporting rod and can move relative to the supporting rod, and the light source part is configured to project light to the optical waveguide; the detection part is movably connected with the supporting platform and can move around the peripheral side of the optical waveguide, and the detection part is configured to be capable of collecting optical information transmitted through the side wall of the optical waveguide. Therefore, the projection angle of the light source part and the acquisition position of the detection part can be flexibly adjusted through the light source part and the detection part which are movably connected, so that all-directional and multi-angle measurement of stray light on the side wall of the optical waveguide can be realized.

Description

Technical Field

[0001] The present invention relates to the field of optical testing technology, and more specifically, to a device and method for measuring stray light on the side wall of an optical waveguide. Background Art

[0002] As a key component in the fields of optical communication and optical information processing, the performance of optical waveguides directly determines the performance and reliability of related devices. In the manufacturing process of optical waveguides, the control of sidewall stray light is particularly critical, because sidewall stray light not only reduces the transmission efficiency of the optical waveguide, but also may introduce unnecessary noise and interference, thereby affecting the performance of the entire system. Therefore, accurate measurement of sidewall stray light of optical waveguides is particularly important. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a novel device and method for measuring stray light on the side wall of an optical waveguide.

[0004] According to one aspect of the present invention, a device for measuring stray light on the side wall of an optical waveguide is provided.

[0005] The optical waveguide side wall stray light measurement device comprises:

[0006] A support part, the support part comprises a support platform and a support rod, the support rod is connected to the support platform, and the support platform is used to place the optical waveguide to be tested;

[0007] a light source part, the light source part being movably connected to the support rod and being movable relative to the support rod, the light source part being configured to project light toward the optical waveguide;

[0008] a detection unit, the detection unit being movably connected to the support platform and being able to move around the circumference of the optical waveguide, the detection unit being configured to collect light information propagating through the side wall of the optical waveguide;

[0009] Wherein, the optical information includes the first optical information collected by the detection unit when the light source unit projects to the coupling-in area of ​​the optical waveguide, propagates to the coupling-out area through total reflection of the optical waveguide, and couples out from the side wall;

[0010] And / or, the second light information collected by the detection unit when the light source unit is projected onto the coupling-in region of the light waveguide and directly diffracted by the side wall of the light waveguide.

[0011] Optionally, the light source unit includes a light source and a first bearing platform, the light source is disposed on the first bearing platform, the first bearing platform is movably connected to the support rod, and the first bearing platform can move and / or rotate along the support rod.

[0012] Optionally, the light source unit further includes a first modulator, and the first modulator is located on the light output path of the light source.

[0013] Optionally, the detection unit includes a detector and a second bearing platform, the detector is arranged on the second bearing platform, the second bearing platform is movably connected to the supporting platform, and the second bearing platform can move and / or rotate along the supporting platform.

[0014] Optionally, the detection unit further includes a second modulator, and the second modulator is arranged on the light incident path of the detector.

[0015] Optionally, the first modulator is an aperture stop or a polarizer;

[0016] And / or, the second modulator is an aperture stop or a polarizer.

[0017] Optionally, the detector is a power meter, a spectrometer or an illuminance meter.

[0018] Optionally, a detection unit is further included, wherein the detection unit is movably connected to the support rod and can move relative to the support rod, and the detection unit is configured to collect image information of the optical waveguide.

[0019] Optionally, the detection unit includes a camera and a third carrier platform, the camera is arranged on the third carrier platform, and the third carrier platform is connected to the support rod and can be lifted and lowered along the support rod to drive the camera to approach or move away from the optical waveguide.

[0020] Optionally, the supporting platform includes a vibration isolation table and a rotating table, the rotating table and the supporting rod are connected to the vibration isolation table, and the rotating table is used to place the optical waveguide to be tested.

[0021] According to another aspect of the present invention, a method for measuring stray light on the side wall of an optical waveguide using the device for measuring stray light on the side wall of an optical waveguide is provided, comprising:

[0022] Placing the optical waveguide to be tested on a supporting platform;

[0023] Adjust the position of the light source part and the position of the detection part;

[0024] The light information collected by the detection unit when the light source unit projects light onto the light waveguide and propagates light through the side wall of the light waveguide to the detection unit is obtained.

[0025] Optionally, the acquiring of light information collected by the detection unit when the light source unit projects light onto the light waveguide and propagates light through the side wall of the light waveguide to the detection unit comprises:

[0026] Acquire the first light information collected by the detection unit when the light source unit projects onto the coupling-in area of ​​the light waveguide, propagates to the coupling-out area through total reflection of the light waveguide, and couples out from the side wall;

[0027] And / or, obtaining second light information collected by the detection unit when the light source unit projects onto the coupling-in region of the light waveguide and directly diffracts through the side wall of the light waveguide.

[0028] Optionally, before placing the optical waveguide to be tested on the supporting platform, the method further comprises:

[0029] Acquire reference light information of the light source unit;

[0030] Importing image information of the optical waveguide to be tested;

[0031] Adjust the optical waveguide to be tested to a predetermined position.

[0032] Optionally, the support platform includes a vibration isolation table and a rotating table, the rotating table is used to place the optical waveguide, and the measuring method further includes:

[0033] rotating the rotating stage and performing repeated measurements;

[0034] The corresponding light information collected by the detection part when the light propagates to the detection part through different side wall positions of the light waveguide is obtained.

[0035] Optionally, it also includes:

[0036] The corresponding light information is compared with the reference light information to obtain the stray light efficiency at the corresponding sidewall position.

[0037] One technical effect of the embodiments of the present disclosure is:

[0038] The optical waveguide side wall stray light measuring device comprises a support part, a light source part and a detection part, wherein the support part comprises a support platform and a support rod, wherein the support rod is connected to the support platform, and the support platform is used to place the optical waveguide to be measured; the light source part is movably connected to the support rod and can move relative to the support rod, and the light source part is configured to project light to the optical waveguide; the detection part is movably connected to the support platform and can move around the circumference of the optical waveguide, and the detection part is configured to collect light information propagating through the side wall of the optical waveguide;

[0039] The optical information includes the first optical information collected by the detection unit when the light source unit is projected onto the coupling-in region of the optical waveguide, propagates to the coupling-out region through total reflection through the optical waveguide and is coupled out from the side wall; and / or the second optical information collected by the detection unit when the light source unit is projected onto the coupling-in region of the optical waveguide and is directly diffracted through the side wall of the optical waveguide.

[0040] In this way, the projection angle of the light source part and the collection position of the detection part can be flexibly adjusted through the movable connection of the light source part and the detection part, so as to achieve all-round and multi-angle measurement of the stray light on the side wall of the optical waveguide, and also improve the comprehensiveness and reliability of the measurement. In addition, the movable connection of the light source part and the detection part can also simplify the measurement steps, optimize the measurement process, and significantly improve the measurement efficiency.

[0041] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0043] Figure 1 is a schematic diagram of a device for measuring stray light on the side wall of an optical waveguide according to an embodiment of the present disclosure;

[0044] Figure 2 is another schematic diagram of a device for measuring stray light on the side wall of an optical waveguide according to an embodiment of the present disclosure;

[0045] Figure 3 4 is a top view of a device for measuring stray light on the side wall of an optical waveguide according to an embodiment of the present disclosure.

[0046] Description of reference numerals:

[0047] 001. Optical waveguide;

[0048] 1. Support part; 11. Support platform; 111. Vibration isolation table; 112. Rotating table; 12. Support rod; 2. Light source part; 21. Light source; 22. First support platform; 23. First modulator; 3. Detection part; 31. Detector; 32. Second support platform; 33. Second modulator; 4. Detection part; 41. Camera; 42. Third support platform. DETAILED DESCRIPTION

[0049] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0050] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0051] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0052] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0053] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0054] The embodiment of the present invention provides a device for measuring stray light on the side wall of an optical waveguide, by which the stray light diffracted by the side wall of the optical waveguide 001 can be measured, thereby evaluating the light leakage amount and efficiency of the side wall of the optical waveguide 001, so as to guide the stray light elimination process.

[0055] like Figures 1 to 3 As shown, the optical waveguide side wall stray light measurement device provided by the embodiment of the present invention includes:

[0056] A support part 1, the support part 1 comprises a support platform 11 and a support rod 12, the support rod 12 is connected to the support platform 11, and the support platform 11 is used to place the optical waveguide 001 to be tested;

[0057] A light source unit 2, wherein the light source unit 2 is movably connected to the support rod 12 and can move relative to the support rod 12, and the light source unit 2 is configured to project light toward the optical waveguide 001;

[0058] A detection unit 3, the detection unit 3 is movably connected to the support platform 11 and can move around the circumference of the optical waveguide 001, and the detection unit 3 is configured to collect light information propagating through the side wall of the optical waveguide 001;

[0059] The optical information includes the first optical information collected by the detection unit 3 when the light source unit 2 projects to the coupling-in area of ​​the optical waveguide 001, propagates to the coupling-out area through total reflection of the optical waveguide 001, and couples out from the side wall;

[0060] And / or, the second light information collected by the detection unit 3 when the light source unit 2 is projected onto the coupling-in region of the light waveguide 001 and directly diffracted by the side wall of the light waveguide 001 .

[0061] like Figure 1 and Figure 2 As shown, the support part includes a support platform 11 and a support rod 12. The support platform 11 can be a horizontally arranged flat plate structure for stably placing the optical waveguide 001 to be measured. The surface of the support platform 11 can be precisely processed to ensure its flatness and smoothness to reduce interference with the measurement results.

[0062] The support rod 12 is vertically connected to the center or one side of the support platform 11, and is used to support the light source unit 2, the detection unit 4 or other structures thereon. The height and position of the support rod 12 can be adjusted according to actual needs to ensure that the light source unit 2 can project light at a suitable angle to the optical waveguide 001. The support rod 12 and the support platform 11 can be formed independently, and the two are connected to form a support part; the support rod 12 and the support platform 11 can also be formed as one piece.

[0063] like Figure 1 and Figure 2 As shown, the light source unit 2 is movably connected to the support rod 12, so that the light source unit 2 can perform translational movement and / or rotational movement relative to the support rod 12, so as to be able to adjust the distance between the light source unit 2 and the optical waveguide 001 and the angle of incident light, thereby facilitating the projection of light at different angles to the optical waveguide 001, which helps to comprehensively measure the stray light information of the side wall of the optical waveguide 001.

[0064] The light source unit 2 may include a light source 21 and a light source adjustment mechanism. The light source 21 may be a laser light source with good monochromaticity, strong coherence and good directivity, or a combination of multiple LED light sources to ensure that the light projected to the optical waveguide 001 has high quality. The light source adjustment mechanism includes but is not limited to an angle adjuster and a light intensity regulator, which are used to adjust the emission angle, light intensity and other parameters of the light source 21 to meet different measurement requirements.

[0065] like Figure 1 and Figure 2 As shown, the detection part 3 is movably connected to the support platform 11, so that the detection part 3 can perform translational movement and / or rotational movement around the circumference of the optical waveguide 001. For example, the detection part 3 can be connected to the support platform 11 by means of a sliding connection and / or a rotational connection. The sliding connection enables the detection part 3 to perform a circular motion or a specific trajectory along the circumference of the optical waveguide 001; the rotational connection enables the detection part 3 to be fine-tuned during the circular motion to ensure that the detector 31 can be aligned with the position to be measured on the side wall of the optical waveguide 001, thereby helping to improve the accuracy and comprehensiveness of the measurement.

[0066] The detection unit 3 may include a detector 31 and a detection adjustment mechanism. The detector 31 is preferably a highly sensitive photoelectric detector, which can collect light information propagating through the side wall of the optical waveguide 001 and convert it into an electrical signal for output. The detection adjustment mechanism includes but is not limited to a position regulator and an angle regulator, which are used to adjust the position, angle and other parameters of the detector 31 to ensure that the detector 31 can accurately collect stray light information at the position to be measured on the side wall of the optical waveguide 001.

[0067] The following briefly introduces the measurement method of the optical waveguide side wall stray light measurement device provided by the embodiment of the present invention:

[0068] S1. The optical waveguide 001 to be tested is placed on the support platform 11, and the emission angle of the light source unit 2 is adjusted so that the light source 21 can project light at a suitable angle to the optical waveguide 001;

[0069] S2. Start the light source unit 2 to make the light source 21 of the light source unit 2 emit light. The light propagates through the side wall of the optical waveguide 001 and is collected by the detection unit 3.

[0070] S3. Rotate the rotating stage 112 on the supporting platform 11 and perform repeated measurements, so that the detection unit 3 can collect stray light information propagating through different side wall positions of the optical waveguide 001 .

[0071] The optical information collected by the detection unit 3 includes: the first optical information collected by the detection unit 3 when the light source unit 2 is projected to the coupling-in area of ​​the optical waveguide 001, propagated to the coupling-out area through the total internal reflection of the optical waveguide 001 and coupled out from the side wall; and / or the second optical information collected by the detection unit 3 when the light source unit 2 is projected to the coupling-in area of ​​the optical waveguide 001 and directly diffracted through the side wall of the optical waveguide 001. In this way, a comprehensive measurement of the stray light diffracted through the side wall of the optical waveguide 001 can be achieved, so as to evaluate the light leakage amount and efficiency of the side wall of the optical waveguide 001, thereby facilitating the guidance of the process of eliminating stray light.

[0072] In the measurement process, the emission angle, light intensity and other parameters of the light source 21, as well as the position, angle and other parameters of the detection unit 3 can be adjusted to meet different measurement requirements and improve measurement accuracy. At the same time, multiple measurements and data analysis can be performed to further verify and optimize the measurement results.

[0073] Thus, the optical waveguide side wall stray light measuring device provided by the embodiment of the present invention can flexibly adjust the projection angle of the light source unit 2 and the collection position of the detection unit 3 through the movably connected light source unit 2 and detection unit 3, thereby realizing all-round and multi-angle measurement of the side wall stray light of the optical waveguide 001, and also improving the comprehensiveness and reliability of the measurement. Moreover, the movably connected light source unit 2 and detection unit 3 can also simplify the measurement steps, optimize the measurement process, and significantly improve the measurement efficiency.

[0074] Optionally, the light source unit 2 includes a light source 21 and a first carrier platform 22 , the light source 21 is disposed on the first carrier platform 22 , the first carrier platform 22 is movably connected to the support rod 12 , and the first carrier platform 22 can move and / or rotate along the support rod 12 .

[0075] like Figure 1 and Figure 2As shown, the first carrier platform 22 can be slidably connected and / or rotatably connected to the support rod 12, so that the first carrier platform 22 can drive the light source 21 thereon to move and / or rotate along the support rod 12, thereby being able to adjust the distance of the light source 21 relative to the optical waveguide 001 and the incident light angle as needed, which helps to optimize the incident conditions of the light, thereby being able to more accurately detect stray light on different side walls of the optical waveguide 001, and also facilitates improving the comprehensiveness of the measurement.

[0076] Furthermore, the rotational connection of the first carrier 22 also enables the light source 21 to rotate in the horizontal plane, further increasing the flexibility of the light projection direction, so that the measuring device can measure the stray light at different positions of the side wall of the optical waveguide 001. The sliding connection between the first carrier 22 and the support rod 12 can be achieved by the cooperation of the guide rail slider, and the rotational connection between the first carrier 22 and the support rod 12 can be achieved by a rotating shaft.

[0077] In addition, the movable connection of the first carrier 22 also enables the light source unit 2 to be suitable for measuring optical waveguides 001 of different specifications and types. By adjusting the position and angle of the light source 21, it can adapt to optical waveguides 001 of different sizes and shapes, enhancing the versatility and compatibility of the measuring device, so that the measuring device can be more widely used in optical communication, optical information processing and other fields to meet more diverse measurement needs.

[0078] The conventional optical waveguide sidewall measurement method may require multiple moves and repositioning of the light source 21 to cover different measurement areas. The measurement device provided by the embodiment of the present invention utilizes the mobility of the first carrier 22 to complete the adjustment of multiple measurement angles and positions at one time, thereby simplifying the measurement process and improving the measurement efficiency. The first carrier 22 may be designed to have six degrees of freedom to adapt to complex adjustment requirements.

[0079] Optionally, the light source unit 2 further includes a first modulator 23 , and the first modulator 23 is located on the light output path of the light source 21 .

[0080] like Figure 1 and Figure 2 As shown, the first modulator 23 can adjust the light intensity or the modulation frequency and duty cycle of the light pulse output by the light source 21, so as to achieve precise control of the light intensity projected onto the optical waveguide 001, so that the measuring device can adapt to the requirements under different measurement conditions. For example, when measuring weak signals or strong signals, better measurement results can be obtained by adjusting the intensity of the light source 21.

[0081] Moreover, the introduction of the first modulator 23 also makes the measurement process more efficient. By presetting the modulation parameters of the light source 21, it is possible to quickly scan and measure the stray light on the side wall of the optical waveguide 001, which not only shortens the measurement time, but also reduces the errors and interferences that may be introduced during the measurement process, thereby improving the reliability and stability of the measurement.

[0082] Optionally, the detection unit 3 includes a detector 31 and a second carrier platform 32 , the detector 31 is disposed on the second carrier platform 32 , the second carrier platform 32 is movably connected to the support platform 11 , and the second carrier platform 32 can move and / or rotate along the support platform 11 .

[0083] like Figure 1 and Figure 2 As shown, the second carrier 32 can move and / or motion along the supporting platform 11 and drive the detector 31 thereon to move, so that the position of the detector 31 relative to the optical waveguide 001 can be adjusted as needed, which helps the detector 31 to capture stray light diffracted from different positions of the side wall of the optical waveguide 001, thereby helping to achieve comprehensive measurement, and can also optimize the detection conditions, reduce errors and interferences in the measurement process, thereby improving the precision and accuracy of the measurement.

[0084] Moreover, the rotation function of the second carrier 32 allows the detector 31 to rotate in the horizontal plane, further increasing the flexibility of the detection angle, so that the measuring device can cover different directions and angles of the side wall of the optical waveguide 001, thereby enhancing the comprehensiveness of the detection. Among them, the sliding connection between the second carrier 32 and the support platform 11 can be achieved by the cooperation of the guide rail slider, and the rotation connection between the second carrier 32 and the support platform 11 can be achieved by a rotating shaft.

[0085] In addition, the movable connection of the second carrier 32 enables the detection unit 3 to be suitable for measuring optical waveguides 001 of different specifications and types. By adjusting the position and angle of the detector 31, it can adapt to optical waveguides 001 of different sizes and shapes, enhancing the versatility and compatibility of the measurement device, so that the measurement device can be more widely used in optical communication, optical information processing and other fields to meet more diverse measurement needs.

[0086] The conventional method for measuring stray light on the sidewall of an optical waveguide may require multiple movements and repositioning of the detector 31 to cover different measurement areas. The measuring device provided in the embodiment of the present invention utilizes the movement and rotation functions of the second carrier 32 to complete the adjustment of multiple measurement angles and positions at one time, thereby simplifying the measurement process and improving the measurement efficiency. This design not only saves time, but also reduces the errors that may be introduced during the measurement process, and improves the reliability and stability of the measurement. Among them, the second carrier 32 can be designed to have six degrees of freedom to adapt to complex adjustment requirements.

[0087] Optionally, the detection unit 3 further includes a second modulator 33 , and the second modulator 33 is arranged on the light incident path of the detector 31 .

[0088] like Figure 1 and Figure 2 As shown, the second modulator 33 is arranged on a side of the detector 31 close to the optical waveguide 001, so that the second modulator 33 can modulate the optical information diffracted by the optical waveguide 001, thereby achieving precise control of the intensity of the light diffracted by the optical waveguide 001 for detection by the detector 31, so that the measuring device can adapt to the requirements under different measuring conditions.

[0089] Moreover, the introduction of the second modulator 33 also makes the measurement process more efficient. By presetting the modulation parameters of the diffracted light, the stray light on the side wall of the optical waveguide 001 can be quickly scanned and measured, which not only shortens the measurement time, but also reduces the errors and interferences that may be introduced during the measurement process, and improves the reliability and stability of the measurement.

[0090] Optionally, the first modulator 23 is an aperture stop or a polarizer;

[0091] And / or, the second modulator 33 is an aperture stop or a polarizer.

[0092] In one embodiment, at least one of the first modulator 23 and the second modulator 33 can be set as an aperture diaphragm, which can accurately control the range of light passing through to adjust the intensity or beam shape of the light source 21, thereby improving the accuracy and controllability of the measurement.

[0093] Among them, by adjusting the opening size, shape and position of the aperture diaphragm, the projection range and intensity of the light source 21 and the receiving range and sensitivity of the detector 31 can be flexibly controlled, so that the measuring device can adapt to optical waveguides 001 of different sizes and shapes, as well as different measurement environments and requirements.

[0094] In another embodiment, at least one of the first modulator 23 and the second modulator 33 can be set as a polarizer, which can selectively pass light with a specific polarization direction, thereby achieving precise control of the polarization state of the light source 21 and improving the accuracy and reliability of the measurement.

[0095] The polarizer can be rotated around its axis to adjust its polarization direction, so that the light source unit 2 and the detection unit 3 can respectively realize precise control and detection of the polarization state of the light, thereby adapting to the optical waveguide 001 with different polarization characteristics and measurement requirements.

[0096] Optionally, the detector 31 is a power meter, a spectrometer or an illuminance meter.

[0097] In one embodiment, the detector 31 may be configured as a power meter, which can accurately measure the received optical power, thereby reflecting the intensity of stray light on the side wall of the optical waveguide 001 , and is helpful for evaluating the performance and quality of the optical waveguide 001 .

[0098] In another embodiment, the detector 31 may be configured as a spectrometer, which can analyze the spectral characteristics of the received light, including wavelength, bandwidth, spectral shape, etc. When a spectrometer is used as the detector 31, spectral information of stray light on the side wall of the optical waveguide 001 can be obtained, which helps to deeply understand the source and nature of the stray light and also improves the accuracy of the measurement.

[0099] In yet another embodiment, the detector 31 may be configured as an illuminance meter. When measuring the stray light on the side wall of the optical waveguide 001 , the illuminance meter may provide intuitive information on the distribution and intensity of the stray light, which is helpful for more comprehensive evaluation of the performance of the optical waveguide 001 .

[0100] Optionally, a detection unit 4 is further included, wherein the detection unit 4 is movably connected to the support rod 12 and can move relative to the support rod 12 , and the detection unit 4 is configured to collect image information of the optical waveguide 001 .

[0101] like Figure 1 and Figure 2 As shown, the introduction of the detection unit 4 enables the measuring device to collect image information of the optical waveguide 001, including the morphology, structure, defects and stray light distribution of the side wall, which helps to more accurately judge the performance and quality of the optical waveguide 001, especially in scenarios requiring high-precision measurement.

[0102] like Figure 3 As shown, the image information of the optical waveguide 001 to be measured can be collected by using detection devices such as a camera 41 and a sensor, and the optical waveguide 001 can be positioned, i.e., position corrected, in combination with the coordinate origin pre-stored in the processor of the measuring device, so that the optical waveguide 001 can be located at a predetermined position A, ensuring that the stray light information measured subsequently is based on the same reference, thereby facilitating the evaluation of the performance of the optical waveguide 001.

[0103] Furthermore, through the image information collected by the detection unit 4, a more accurate qualitative and quantitative analysis can be performed on the stray light on the side wall of the optical waveguide 001, thereby providing richer details and a more intuitive display, helping to reduce measurement errors and uncertainties, and also improving the accuracy and reliability of the measurement. In addition, the detection unit 4 can also be combined with other measurement methods such as a power meter and a spectrometer to achieve multi-modal measurement, thereby providing a more comprehensive performance evaluation of the optical waveguide 001, including multiple aspects such as side wall stray light, transmission loss, and spectral characteristics, which helps to gain a deeper understanding of the performance and quality of the optical waveguide 001.

[0104] Among them, the detection part 4 can make a lifting movement relative to the support rod 12 to adjust its position, so as to adapt to the measurement needs of optical waveguides 001 of different sizes, shapes and positions, so that the measuring device can be more widely used in the measurement of various optical waveguides 001, and the adaptability and versatility of the measurement are improved.

[0105] Optionally, the detection unit 4 includes a camera 41 and a third support platform 42, the camera 41 is arranged on the third support platform 42, the third support platform 42 is connected to the support rod 12 and can be lifted and lowered along the support rod 12 to drive the camera 41 to approach or move away from the optical waveguide 001.

[0106] like Figure 1 and Figure 2 As shown, by utilizing the lifting movement of the third carrier 42, the vertical distance between the camera 41 and the optical waveguide 001 can be adjusted, so as to adapt to optical waveguides 001 of different thicknesses, which is crucial for analyzing the stray light distribution, morphological structure and potential defects of the side wall of the optical waveguide 001, and also enables the measuring device to be more widely used in the measurement of various optical waveguides 001, thereby improving the adaptability and versatility of the measurement.

[0107] Among them, by adjusting the position and height of the camera 41, it is possible to ensure that the light conditions, focal length and field of view during image acquisition are in the best state, thereby improving the quality and clarity of image acquisition. In addition, the lifting movement can also quickly adjust the camera 41 to an appropriate position, reducing the steps of moving and adjusting the camera 41 multiple times in the traditional measurement method, and also improving the measurement efficiency.

[0108] Optionally, the supporting platform 11 includes a vibration isolation table 111 and a rotating table 112 , the rotating table 112 and the supporting rod 12 are connected to the vibration isolation table 111 , and the rotating table 112 is used to place the optical waveguide 001 to be tested.

[0109] like Figure 1 and Figure 2As shown, the vibration isolation table 111 is used to shield the disturbance caused by the vibration of the external environment of the test, thereby ensuring the measurement reliability of the measuring device. The rotating table 112 is arranged on the vibration isolation table 111, and the rotating table 112 is used to support the optical waveguide 001 to be measured, and can drive the optical waveguide 001 to rotate together, so that different side wall positions of the optical waveguide 001 are opposite to the detection part 3, so that the stray light at different side wall positions of the optical waveguide 001 can be measured.

[0110] The embodiment of the present invention further provides a method for measuring a stray light measurement device for a side wall of an optical waveguide, comprising:

[0111] S1. Place the optical waveguide 001 to be tested on the supporting platform;

[0112] S2. Adjust the position of the light source unit 2 and the position of the detection unit 3;

[0113] S3. Obtaining light information collected by the detection unit 3 when the light source unit 2 projects light onto the light waveguide 001 and propagates through the side wall of the light waveguide 001 to the detection unit 3 .

[0114] Thus, through the movable connection of the light source unit 2 and the detection unit 3, the projection angle of the light source unit 2 and the collection position of the detection unit 3 can be flexibly adjusted, so that the omnidirectional and multi-angle measurement of the stray light on the side wall of the optical waveguide 001 can be achieved, and the comprehensiveness and reliability of the measurement are improved. In addition, the movable connection of the light source unit 2 and the detection unit 3 can also simplify the measurement steps, optimize the measurement process, and significantly improve the measurement efficiency.

[0115] Optionally, the acquiring of light information collected by the detection unit 3 when the light source unit 2 projects onto the light waveguide 001 and propagates through the side wall of the light waveguide 001 to the detection unit 3 includes:

[0116] Acquire the first light information collected by the detection unit 3 when the light source unit 2 projects to the coupling-in area of ​​the optical waveguide 001, propagates to the coupling-out area through total reflection of the optical waveguide 001, and couples out from the side wall;

[0117] And / or, obtaining the second light information collected by the detection unit 3 when the light source unit 2 projects to the coupling-in region of the light waveguide 001 and directly diffracts through the side wall of the light waveguide 001 .

[0118] Thus, by using the above-mentioned measuring device and measuring method, it is possible to achieve a comprehensive measurement of the stray light diffracted by the side wall of the optical waveguide 001, so as to evaluate the light leakage amount and efficiency of the side wall of the optical waveguide 001, thereby facilitating the guidance of the stray light elimination process.

[0119] Optionally, before placing the optical waveguide 001 to be tested on the supporting platform 11, the method further includes:

[0120] Acquiring reference light information of the light source unit 2;

[0121] Importing image information of the optical waveguide 001 to be tested;

[0122] Adjust the optical waveguide 001 to be tested to a predetermined position.

[0123] like Figure 1 As shown, when the optical waveguide 001 to be tested is not placed on the supporting platform 11, the light information collected by the detection part 3 when the light source part 2 projects onto the detection part 3 is obtained, that is, the reference light information of the light source part 2, so as to compare with the light information diffracted by the side wall of the optical waveguide 001 collected by the subsequent detection part 3 and obtain the stray light efficiency, so as to evaluate the performance of the optical waveguide 001.

[0124] like Figure 3 As shown, the image information of the optical waveguide 001 to be measured can be collected by using detection devices such as a camera 41 and a sensor, and the position of the optical waveguide 001 can be corrected in combination with the coordinate origin pre-stored in the processor of the measuring device, so that the optical waveguide 001 can be located at the predetermined position A, ensuring that the stray light information measured subsequently is based on the same reference, thereby facilitating the evaluation of the performance of the optical waveguide 001.

[0125] Optionally, the support platform 11 includes a vibration isolation platform 111 and a rotating platform 112, and the rotating platform 112 is used to place the optical waveguide 001. The measuring method further includes:

[0126] Rotating the rotating stage 112 and performing repeated measurements;

[0127] The corresponding light information collected by the detection part 3 when propagating to the detection part 3 through different side wall positions of the optical waveguide 001 is obtained.

[0128] like Figure 1 and Figure 2 As shown, the vibration isolation table 111 is used to shield the disturbance caused by the vibration of the external environment of the test, thereby ensuring the measurement reliability of the measuring device. The rotating table 112 is arranged on the vibration isolation table 111, and the rotating table 112 is used to support the optical waveguide 001 to be measured, and can drive the optical waveguide 001 to rotate together, so that different side wall positions of the optical waveguide 001 are opposite to the detection part 3, so that the stray light at different side wall positions of the optical waveguide 001 can be measured.

[0129] Optionally, it also includes:

[0130] Compare the corresponding light information with the reference light information and obtain the stray light efficiency at the corresponding sidewall position. That is, by dividing the detected stray light at different sidewall positions of the optical waveguide 001 by the reference light information, the stray light efficiency at different sidewall positions of the optical waveguide 001 can be obtained, which is convenient for evaluating the performance of the optical waveguide 001.

[0131] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0132] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. An optical waveguide side wall stray light measurement device, characterized in that: include: A support part (1), the support part (1) comprising a support platform (11) and a support rod (12), the support rod (12) being connected to the support platform (11), and the support platform (11) being used to place an optical waveguide (001) to be tested; a light source unit (2), the light source unit (2) being movably connected to the support rod (12) and being capable of moving relative to the support rod (12), the light source unit (2) being configured to project light onto the optical waveguide (001); a detection unit (3), the detection unit (3) being movably connected to the support platform (11) and being capable of moving around the circumference of the optical waveguide (001), the detection unit (3) being configured to collect optical information propagating through the side wall of the optical waveguide (001); The optical information includes first optical information collected by the detection unit (3) when the light source unit (2) projects onto the coupling-in area of ​​the optical waveguide (001), propagates to the coupling-out area through total reflection of the optical waveguide (001) and couples out from the side wall; And / or, the second light information collected by the detection unit (3) when the light source unit (2) is projected onto the coupling-in region of the light waveguide (001) and directly diffracted by the side wall of the light waveguide (001).

2. The optical waveguide side wall stray light measurement device according to claim 1, characterized in that: The light source part (2) comprises a light source (21) and a first bearing platform (22); the light source (21) is arranged on the first bearing platform (22); the first bearing platform (22) is movably connected to the support rod (12), and the first bearing platform (22) can move and / or rotate along the support rod (12).

3. The optical waveguide side wall stray light measurement device according to claim 2, characterized in that: The light source unit (2) further comprises a first modulator (23), wherein the first modulator (23) is located on the light output path of the light source (21).

4. The optical waveguide side wall stray light measurement device according to claim 3, characterized in that: The detection part (3) comprises a detector (31) and a second bearing platform (32); the detector (31) is arranged on the second bearing platform (32); the second bearing platform (32) is movably connected to the supporting platform (11), and the second bearing platform (32) can move and / or rotate along the supporting platform (11).

5. The optical waveguide side wall stray light measurement device according to claim 4, characterized in that: The detection unit (3) further comprises a second modulator (33), wherein the second modulator (33) is arranged on the light incident path of the detector (31).

6. The optical waveguide side wall stray light measurement device according to claim 5, characterized in that: The first modulator (23) is an aperture stop or a polarizing plate; And / or, the second modulator (33) is an aperture stop or a polarizer.

7. The optical waveguide side wall stray light measurement device according to claim 4, characterized in that: The detector (31) is a power meter, a spectrometer or an illuminance meter.

8. The optical waveguide side wall stray light measurement device according to claim 1, characterized in that: It also comprises a detection part (4), the detection part (4) being movably connected to the support rod (12) and being able to move relative to the support rod (12), the detection part (4) being configured to be able to collect image information of the optical waveguide (001).

9. The optical waveguide side wall stray light measurement device according to claim 8, characterized in that: The detection unit (4) comprises a camera (41) and a third carrier platform (42), wherein the camera (41) is arranged on the third carrier platform (42), and the third carrier platform (42) is connected to the support rod (12) and can be lifted and lowered along the support rod (12) to drive the camera (41) to approach or move away from the optical waveguide (001).

10. The optical waveguide side wall stray light measurement device according to claim 1, characterized in that: The support platform (11) comprises a vibration isolation table (111) and a rotating table (112); the rotating table (112) and the support rod (12) are connected to the vibration isolation table (111); and the rotating table (112) is used to place an optical waveguide (001) to be tested.

11. A method for measuring stray light from the side wall of an optical waveguide using the device for measuring stray light from the side wall of an optical waveguide according to any one of claims 1 to 10, characterized in that: include: Placing the optical waveguide to be tested on a supporting platform; Adjust the position of the light source part and the position of the detection part; The light information collected by the detection unit when the light source unit projects light onto the light waveguide and propagates light through the side wall of the light waveguide to the detection unit is obtained.

12. The measuring method according to claim 11, characterized in that: The step of acquiring light information collected by the detection unit when the light source unit projects light onto the light waveguide and propagates light through the side wall of the light waveguide to the detection unit comprises: Acquire the first light information collected by the detection unit when the light source unit projects onto the coupling-in area of ​​the light waveguide, propagates to the coupling-out area through total reflection of the light waveguide, and couples out from the side wall; And / or, obtaining second light information collected by the detection unit when the light source unit projects onto the coupling-in region of the light waveguide and directly diffracts through the side wall of the light waveguide.

13. The measuring method according to claim 11, characterized in that: Before placing the optical waveguide to be tested on the supporting platform, the method further comprises: Acquire reference light information of the light source unit; Importing image information of the optical waveguide to be tested; Adjust the optical waveguide to be tested to a predetermined position.

14. The measuring method according to claim 13, characterized in that: The support platform includes a vibration isolation platform and a rotating platform, and the rotating platform is used to place the optical waveguide. The measuring method further includes: rotating the rotating stage and performing repeated measurements; The corresponding light information collected by the detection part when the light propagates to the detection part through different side wall positions of the light waveguide is obtained.

15. The measuring method according to claim 14, characterized in that: Also includes: The corresponding light information is compared with the reference light information to obtain the stray light efficiency at the corresponding sidewall position.

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