WO2024094230A1 - Measurement device and measurement method for transmittance and numerical aperture of optical fiber - Google Patents
Measurement device and measurement method for transmittance and numerical aperture of optical fiber Download PDFInfo
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- WO2024094230A1 WO2024094230A1 PCT/CN2023/143310 CN2023143310W WO2024094230A1 WO 2024094230 A1 WO2024094230 A1 WO 2024094230A1 CN 2023143310 W CN2023143310 W CN 2023143310W WO 2024094230 A1 WO2024094230 A1 WO 2024094230A1
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 163
- 238000002834 transmittance Methods 0.000 title claims abstract description 32
- 238000005259 measurement Methods 0.000 title abstract 3
- 238000000691 measurement method Methods 0.000 title abstract 2
- 238000012360 testing method Methods 0.000 claims abstract description 59
- 238000003384 imaging method Methods 0.000 claims abstract description 43
- 230000003287 optical effect Effects 0.000 claims abstract description 27
- 238000007493 shaping process Methods 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 10
- 238000004364 calculation method Methods 0.000 claims description 7
- 238000013016 damping Methods 0.000 claims description 5
- 238000002955 isolation Methods 0.000 claims description 5
- 238000012876 topography Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 101001121408 Homo sapiens L-amino-acid oxidase Proteins 0.000 description 1
- 102100026388 L-amino-acid oxidase Human genes 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004148 unit process Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
Definitions
- the present application relates to the technical field of optical device performance detection, and in particular to a detection device and a detection method for optical fiber transmittance and numerical aperture.
- the numerical aperture of an optical fiber describes the cone angle when light enters and exits the optical fiber, indicating the ability of the optical fiber to receive incident light.
- the numerical aperture of the optical fiber there are certain requirements for the numerical aperture of the optical fiber.
- a lens with the same numerical aperture as the optical fiber numerical aperture should be used to collect light.
- the transmittance is a direct representation of the optical device's ability to transmit light. Therefore, accurately measuring the numerical aperture and transmittance is very meaningful for measuring the quality of optical fiber products.
- the test system cannot complete the test of the numerical aperture and transmittance of optical fiber products at the same time, and there are multiple problems such as low test repeatability, complex debugging, and easy damage to materials.
- the present application provides a detection device and a detection method for optical fiber transmittance and numerical aperture, and the technical solution adopted is as follows:
- the detection device for the transmittance and numerical aperture of an optical fiber comprises a laser light source, a first optical fiber fixing frame, a first lens group, a second optical fiber fixing frame, a second lens group, an optical power meter, and an imaging camera.
- the laser light source outputs a test beam through an output optical fiber;
- the first optical fiber fixing frame is used to fix the output end of the output optical fiber;
- the distance between the first lens group and the first optical fiber fixing frame is adjustable, and the first lens group is used to shape the test beam output by the output optical fiber;
- the second optical fiber fixing frame is used to fix the optical fiber to be tested;
- the second lens group is used to shape the test beam output by the optical fiber to be tested;
- the optical power meter is used to obtain the transmittance of the test beam passing through the optical fiber to be tested; and the imaging camera is used to test the light spot morphology data.
- the first lens group includes two convex lenses, the convex surfaces of the two convex lenses are arranged opposite to each other, and the distance from the output end of the output optical fiber to the first lens group is adjusted to adjust the numerical aperture of the light source incident on the optical fiber to be tested.
- the second lens group includes an objective lens, a condenser lens group, and a beam splitter prism.
- the objective lens is arranged behind the second optical fiber fixing frame, and the objective lens shapes the light beam output by the optical fiber to be tested into a parallel light beam;
- the condenser lens group is arranged behind the objective lens, and the condenser lens group focuses the parallel light beam into an image and outputs it to the imaging camera;
- the beam splitter prism is arranged between the objective lens and the condenser lens group, and the beam splitter prism splits the test beam into a first beam and a second beam.
- the first beam is output to the optical power meter, and the second beam is output to the imaging camera via the condenser lens group.
- the testing device includes a first mobile platform, a second mobile platform, and a third mobile platform.
- the laser light source, the first optical fiber fixing frame, and the first lens group are installed on the first mobile platform
- the second optical fiber fixing frame is installed on the second mobile platform
- the second lens group, the optical power meter, and the imaging camera are installed on the third mobile platform
- the first mobile platform and the second mobile platform are both configured as five-axis adjustable platforms
- the distance between the third mobile platform and the second mobile platform is adjustable.
- the detection device includes a fixed platform, and the first mobile platform, the second mobile platform, and the third mobile platform are installed on the fixed platform.
- the fixed platform is equipped with rubber damping vibration isolation pads and a horizontal bearing adjustment mechanism.
- the horizontal bearing adjustment mechanism is used to adjust the level of the fixed platform to ensure the accuracy of the test results, and the rubber damping vibration isolation pads are used to enhance the seismic resistance of the fixed platform.
- the detection device includes a control system
- the control system includes an axis adjustment feedback unit
- the axis adjustment feedback unit is electrically connected to the first mobile platform, the second mobile platform, and the third mobile platform respectively.
- control system includes an image acquisition and computing unit, the image acquisition and computing unit is electrically connected to the imaging camera, and the axis adjustment feedback unit is electrically connected to the image acquisition and computing unit.
- control system is electrically connected to the laser light source, and the laser light source may be an adjustable narrow-band laser light source or a broadband laser light source.
- the present application also provides a method for detecting the transmittance and numerical aperture of an optical fiber.
- the method is implemented based on the aforementioned detection device and includes:
- the distance between the first lens group and the first optical fiber fixing frame is adjusted so that the test light beam is incident on the optical fiber to be tested with different numerical apertures, and the numerical aperture of the optical fiber to be tested is calculated through the light spot obtained by the imaging camera.
- the front end face and the rear end face of the optical fiber to be tested are imaged respectively and the coordinates of the centroid position of the light spot are recorded.
- the coordinates of the centroid position of the light spot are consistent twice, the coaxial debugging of the laser light source, the optical fiber to be tested, and the imaging camera is considered to be completed.
- the detection device sets a first lens group between the output optical fiber and the optical fiber to be tested to prevent the material from being damaged, and the distance between the first lens group and the output optical fiber is adjusted to make the test beam
- the transmittance can be tested while the numerical aperture of the optical fiber under test can be calculated by measuring the light spot morphology data output by the optical fiber under test with the help of an imaging camera.
- FIG. 1 is a schematic diagram of the structure of a device for detecting the transmittance and numerical aperture of an optical fiber imaging element.
- Figure numerals 110, laser light source; 120, first optical fiber fixing bracket; 121, output optical fiber; 201, first convex lens; 202, second convex lens; 300, second optical fiber fixing bracket; 410, objective lens; 420, beam splitter prism; 430, condenser lens group; 510, optical power meter; 520, imaging camera; 610, first mobile platform; 620, second mobile platform; 630, third mobile platform; 700, control system; 800, fixed platform.
- the terms “installed”, “connected”, and “connected” should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components.
- installed should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components.
- the numerical aperture of an optical fiber describes the cone angle when light enters and exits the optical fiber, indicating the ability of the optical fiber to receive incident light.
- optical fiber communication systems There are certain requirements for the numerical aperture of optical fiber.
- a lens with the same numerical aperture as the optical fiber should be used to collect light.
- Transmittance is a direct representation of the optical device's ability to transmit light. Therefore, accurately measuring the numerical aperture and transmittance is very meaningful for measuring the quality of optical fiber products.
- the test system cannot complete the test of the numerical aperture and transmittance of optical fiber products at the same time, and there are multiple problems such as low test repeatability, complex debugging, and easy damage to materials.
- the present application relates to a detection device for the transmittance and numerical aperture of an optical fiber.
- the detection device includes a laser light source 110, a first optical fiber fixing frame 120, a first lens group, a second optical fiber fixing frame 300, a second lens group, an optical power meter 510, and an imaging camera 520.
- the laser light source 110 outputs a test beam through an output optical fiber 121; the first optical fiber fixing frame 120 is used to fix the output end of the output optical fiber 121; the distance between the first lens group and the first optical fiber fixing frame 120 is adjustable, and the first lens group is used to shape the test beam output by the output optical fiber 121; the second optical fiber fixing frame 300 is used to fix the optical fiber to be tested; the second lens group is used to shape the test beam output by the optical fiber to be tested; the optical power meter 510 is used to obtain the transmittance of the test beam passing through the optical fiber to be tested; and the imaging camera 520 is used to test the light spot morphology data.
- the detection device sets a first lens group between the output optical fiber 121 and the optical fiber to be tested to avoid material damage.
- the test light beam enters the optical fiber to be tested with different incident cone angles.
- the imaging camera 520 can be used to test the spot morphology data output by the optical fiber to be tested to calculate the numerical aperture of the optical fiber to be tested.
- the test light beam can be incident on the first lens group at different cone angles, and then refracted twice by the first lens group, the cone angle of the light beam emitted from the first lens group is changed, and the divergence degree of the light beam is changed to achieve light beam shaping, so that the light beam is incident on the optical fiber to be tested with different numerical apertures.
- the second lens group includes an objective lens 410, a condenser lens group 430, and a beam splitter 420.
- the objective lens 410 is arranged behind the second optical fiber fixing frame 300, and the objective lens 410 shapes the light beam output by the optical fiber to be tested into a parallel light beam;
- the condenser lens group 430 is arranged behind the objective lens 410, and the condenser lens group 430 focuses the parallel light beam into an image and outputs it to the imaging camera 520;
- the beam splitter 420 is arranged between the objective lens 410 and the condenser lens group 430, and the beam splitter 420 splits the test light beam into a first light beam and a second light beam, the first light beam is output to the optical power meter 510, and the second light beam is output to the imaging camera 520 via the condenser lens group 430.
- objective lenses 410 with different magnifications can be selected according to the light spot requirements of the product, and the condenser lens group 430 and the objective lenses 410 with different magnifications are combined into an image of a specified method magnification, and the morphological data of the test light spot at the light spot to the imaging camera 520 are output, so as to be suitable for the testing of optical fiber products of multiple specifications.
- the first light beam and the second light beam are perpendicular to each other.
- the test device includes a first mobile platform 610, a second mobile platform 620, and a third mobile platform 630.
- the laser light source 110, the first optical fiber fixing frame 120, and the first lens group are installed on the first mobile platform 610.
- the second optical fiber fixing frame 300 is installed on the second mobile platform 620.
- the second lens group, the optical power meter 510, and the imaging camera 520 are installed on the third mobile platform 630.
- the distance between the third mobile platform 630 and the second mobile platform 620 is adjustable. It can be understood that the distance between the first mobile platform 610 and the second mobile platform 620 is adjusted so that the test beam is incident on the optical fiber to be tested with different numerical apertures.
- the distance between the second movable platform 620 and the third movable platform 630 is adjusted so that the test light beam emitted from the optical fiber to be tested is adjusted to different positions for spot testing.
- the first mobile platform 610 and the second mobile platform 620 are both configured as five-axis adjustable platforms, so that the laser light source 110, the first lens group, the optical fiber to be tested and other components can adjust their angles while adjusting their positions, so as to complete coaxial debugging or other product testing and meet the needs of different application scenarios.
- the detection device includes a control system 700
- the control system 700 includes an axis adjustment feedback unit, which is electrically connected to the first mobile platform 610, the second mobile platform 620, and the third mobile platform 630.
- the axis adjustment feedback unit includes a PLC and three servo motors corresponding to the first mobile platform 610, the second mobile platform 620, and the third mobile platform 630.
- the PLC sends corresponding instructions to the specified servo motor to drive the corresponding mobile platform to move, so as to complete the position adjustment.
- control system 700 includes an image acquisition and calculation unit, which is electrically connected to the imaging camera 520, and the axis adjustment feedback unit is electrically connected to the image acquisition and calculation unit.
- the image acquisition and calculation unit is used to analyze the spot morphology data obtained by the imaging camera 520 test.
- the image acquisition and calculation unit processes the spot image through a visual algorithm to obtain the product coordinates, and according to the coordinate difference of the center of mass of the spot formed by the front end face imaging and the rear end face of the optical fiber to be tested, the coordinate deviation is fed back to the PLC for processing, and then the PLC sends an instruction to drive the motor to move to the corresponding position to complete the test.
- control system 700 is electrically connected to the laser light source 110, and the laser light source 110 can be an adjustable narrowband laser light source or a broadband laser light source. Compared with the single input light source in the prior art, the present application can adjust the laser light source 110 through the control system 700 to meet various test requirements.
- the first lens group includes two convex lenses, and the convex surfaces of the two convex lenses are arranged opposite to each other.
- the distance from the output end of the output optical fiber 121 to the first lens group is adjusted to adjust the numerical aperture of the light source incident on the optical fiber to be tested.
- the first convex lens 201 and the second convex lens 202 are set as single-sided convex lenses. It can be understood that by adjusting the distance between the output optical fiber 121 and the first lens group, the test light beam is incident on the first convex lens 201 at different incident angles, and the light beam is shaped and its divergence angle is changed.
- the first lens group can also add cylindrical mirrors or other lenses to further shape the test light beam emitted from the output optical fiber.
- the testing device includes a fixed platform 800, and the first mobile platform 610, the second mobile platform 620, and the third mobile platform 630 are installed on the fixed platform 800.
- the fixed platform 800 is installed with a rubber damping vibration isolation pad, which is used to enhance the seismic resistance of the fixed platform 800.
- the fixed platform 800 is equipped with a horizontal bearing adjustment mechanism. It can be understood that the horizontal bearing adjustment mechanism is used to adjust the level of the fixed platform 800 to ensure the accuracy of the test results.
- the common optical platform equipment in this field will not be described in detail here.
- the detection device includes a black box, and it can be understood that the black box is used to prevent the influence of the ambient light source on the detection device.
- the black box can cover the fixed platform 800 to protect the entire detection device from the influence of the ambient light source; the black box can also cover the part from the laser light source 110 to the second optical fiber fixing frame 300, that is, the part of the first mobile platform 610 and the second mobile platform 620.
- the present application also relates to a method for detecting the transmittance and numerical aperture of an optical fiber. Based on the aforementioned detection device, the detection method includes:
- the distance between the first lens group and the first optical fiber fixing frame 120 is adjusted so that the test light beam is incident on the optical fiber to be tested with different numerical apertures, and the numerical aperture of the optical fiber to be tested is calculated through the light spot obtained by the imaging camera 520.
- the method for calculating the numerical aperture through the light spot formed by the optical fiber to be tested includes:
- the centroid abscissa of spot a is Xa mm
- the diameter of spot a is Da mm
- the centroid abscissa of spot b is Xb mm
- the diameter of spot b is Db mm
- the front end face and the rear end face of the optical fiber to be tested are imaged respectively and the coordinates of the centroid position of the light spot are recorded.
- the coaxial debugging of the laser light source 110, the optical fiber to be tested and the imaging camera 520 is considered to be completed.
- the axis adjustment feedback unit drives the second mobile platform 620 to move the centroid of the light spot along the X-axis toward the center, and the movement amount A 2 is A 1 /2, and the adjustment is repeated until the centroid of the light spot coincides with the center of the field of view, and then the second mobile platform 620 is driven to move the centroid of the light spot along the Y-axis toward the center, and the movement amount B 2 is B 1 /2. Repeated adjustment until the centroid of the light spot coincides with the center of the field of view is considered to be completed.
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Abstract
Disclosed in the present application are a measurement device and measurement method for the transmittance and numerical aperture of an optical fiber. The measurement device comprises a laser source, a first optical fiber holder, a first lens set, a second optical fiber holder, a second lens set, an optical power meter and an imaging camera, wherein the laser source outputs a test beam through an exit optical fiber; the first optical fiber holder is used for fixing an output end of the exit optical fiber; the distance between the first lens set and the first optical fiber holder is adjustable, and the first lens set is used for shaping the test beam output through the exit optical fiber; the second optical fiber holder is used for fixing an optical fiber to be tested; the second lens set is used for shaping the test beam output through the optical fiber to be tested; the optical power meter is used for acquiring the transmittance of the optical fiber to be tested through which the test beam passes; and the imaging camera is used for testing topography data of a light spot. By adjusting the distance between the first lens set and the first optical fiber holder, the transmittance and numerical aperture of a product can be tested simultaneously.
Description
本申请涉及光学器件性能检测技术领域,特别涉及用于光导纤维透过率及数值孔径的检测装置及检测方法。The present application relates to the technical field of optical device performance detection, and in particular to a detection device and a detection method for optical fiber transmittance and numerical aperture.
随着光通信技术的飞速发展,光导纤维即光纤的应用已非常普及。在光学中,光纤的数值孔径描述了光进出光纤时的锥角大小,表示光纤接收入射光的能力。在光纤通信系统中,对光纤的数值孔径有一定的要求,通常为了最有效地把光射入到光纤中去,应采用其数值孔径与光纤数值孔径相同的透镜进行集光。透过率则是光学器件传输光能力大小的直接表征。因此,准确地测量数值孔径及透过率对于衡量光纤产品的质量十分有意义。现行产品中,测试系统无法同时完成光纤产品数值孔径及透过率的测试,且存在测试可重复性低、调试复杂、物料易撞坏等多重问题。With the rapid development of optical communication technology, the application of optical fiber, or optical fiber, has become very popular. In optics, the numerical aperture of an optical fiber describes the cone angle when light enters and exits the optical fiber, indicating the ability of the optical fiber to receive incident light. In the optical fiber communication system, there are certain requirements for the numerical aperture of the optical fiber. Usually, in order to most effectively inject light into the optical fiber, a lens with the same numerical aperture as the optical fiber numerical aperture should be used to collect light. The transmittance is a direct representation of the optical device's ability to transmit light. Therefore, accurately measuring the numerical aperture and transmittance is very meaningful for measuring the quality of optical fiber products. In current products, the test system cannot complete the test of the numerical aperture and transmittance of optical fiber products at the same time, and there are multiple problems such as low test repeatability, complex debugging, and easy damage to materials.
发明内容Summary of the invention
为解决上述技术问题中的至少之一,本申请提供用于光导纤维透过率及数值孔径的检测装置及检测方法,所采用的技术方案如下:In order to solve at least one of the above technical problems, the present application provides a detection device and a detection method for optical fiber transmittance and numerical aperture, and the technical solution adopted is as follows:
本申请所提供的用于光导纤维透过率及数值孔径的检测装置包括激光光源、第一光纤固定架、第一透镜组、第二光纤固定架、第二透镜组、光功率计、成像相机,所述激光光源通过出射光纤输出测试光束;所述第一光纤固定架用于固定所述出射光纤的输出端;所述第一透镜组与所述第一光纤固定架之间的距离可调节,所述第一透镜组用于整形所述出射光纤输出的测试光束;所述第二光纤固定架用于固定待测光纤;所述第二透镜组用于整形待测光纤输出的测试光束;所述光功率计用于获取测试光束经行待测光纤的透过率;所述成像相机用于测试光斑形貌数据。The detection device for the transmittance and numerical aperture of an optical fiber provided in the present application comprises a laser light source, a first optical fiber fixing frame, a first lens group, a second optical fiber fixing frame, a second lens group, an optical power meter, and an imaging camera. The laser light source outputs a test beam through an output optical fiber; the first optical fiber fixing frame is used to fix the output end of the output optical fiber; the distance between the first lens group and the first optical fiber fixing frame is adjustable, and the first lens group is used to shape the test beam output by the output optical fiber; the second optical fiber fixing frame is used to fix the optical fiber to be tested; the second lens group is used to shape the test beam output by the optical fiber to be tested; the optical power meter is used to obtain the transmittance of the test beam passing through the optical fiber to be tested; and the imaging camera is used to test the light spot morphology data.
本申请的某些实施例中,所述第一透镜组包括两个凸透镜,两个所述凸透镜的凸面相背设置,调节所述出射光纤输出端到所述第一透镜组的距离以调节光源入射至待测光纤处的数值孔径。In certain embodiments of the present application, the first lens group includes two convex lenses, the convex surfaces of the two convex lenses are arranged opposite to each other, and the distance from the output end of the output optical fiber to the first lens group is adjusted to adjust the numerical aperture of the light source incident on the optical fiber to be tested.
本申请的某些实施例中,所述第二透镜组包括物镜、聚光镜组、分光棱镜,所述物镜设置在所述第二光纤固定架之后,所述物镜将待测光纤输出的光束整形成为平行光束;所述聚光镜组设置在所述物镜之后,所述聚光镜组将平行光束聚焦成像并输出至所述成像相机;所
述分光棱镜设置在所述物镜与所述聚光镜组之间,所述分光棱镜将测试光束分为第一光束和第二光束,所述第一光束输出至所述光功率计,所述第二光束经由所述聚光镜组输出至所述成像相机。In some embodiments of the present application, the second lens group includes an objective lens, a condenser lens group, and a beam splitter prism. The objective lens is arranged behind the second optical fiber fixing frame, and the objective lens shapes the light beam output by the optical fiber to be tested into a parallel light beam; the condenser lens group is arranged behind the objective lens, and the condenser lens group focuses the parallel light beam into an image and outputs it to the imaging camera; The beam splitter prism is arranged between the objective lens and the condenser lens group, and the beam splitter prism splits the test beam into a first beam and a second beam. The first beam is output to the optical power meter, and the second beam is output to the imaging camera via the condenser lens group.
本申请的某些实施例中,测试装置包括第一移动平台、第二移动平台、第三移动平台,所述激光光源、所述第一光纤固定架、所述第一透镜组安装于所述第一移动平台,所述第二光纤固定架安装于所述第二移动平台,所述第二透镜组、所述光功率计、所述成像相机安装于所述第三移动平台,所述第一移动平台、所述第二移动平台均设置为五轴可调节平台,所述第三移动平台与所述第二移动平台之间的距离可调节。In certain embodiments of the present application, the testing device includes a first mobile platform, a second mobile platform, and a third mobile platform. The laser light source, the first optical fiber fixing frame, and the first lens group are installed on the first mobile platform, the second optical fiber fixing frame is installed on the second mobile platform, the second lens group, the optical power meter, and the imaging camera are installed on the third mobile platform, the first mobile platform and the second mobile platform are both configured as five-axis adjustable platforms, and the distance between the third mobile platform and the second mobile platform is adjustable.
本申请的某些实施例中,检测装置包括固定平台,所述第一移动平台、所述第二移动平台、所述第三移动平台安装于所述固定平台,所述固定平台安装有橡胶阻尼隔振垫和水平轴承调节机构,所述水平轴承调节机构用于调节所述固定平台的水平以确保测试结果的精度,所述橡胶阻尼隔振垫用于增强所述固定平台的抗震性。In certain embodiments of the present application, the detection device includes a fixed platform, and the first mobile platform, the second mobile platform, and the third mobile platform are installed on the fixed platform. The fixed platform is equipped with rubber damping vibration isolation pads and a horizontal bearing adjustment mechanism. The horizontal bearing adjustment mechanism is used to adjust the level of the fixed platform to ensure the accuracy of the test results, and the rubber damping vibration isolation pads are used to enhance the seismic resistance of the fixed platform.
本申请的某些实施例中,检测装置包括控制系统,所述控制系统包括轴调节反馈单元,所述轴调节反馈单元分别与所述第一移动平台、所述第二移动平台、所述第三移动平台电性连接。In certain embodiments of the present application, the detection device includes a control system, the control system includes an axis adjustment feedback unit, and the axis adjustment feedback unit is electrically connected to the first mobile platform, the second mobile platform, and the third mobile platform respectively.
本申请的某些实施例中,所述控制系统包括图像采集计算单元,所述图像采集计算单元与所述成像相机电性连接,所述轴调节反馈单元与所述图像采集计算单元电性连接。In certain embodiments of the present application, the control system includes an image acquisition and computing unit, the image acquisition and computing unit is electrically connected to the imaging camera, and the axis adjustment feedback unit is electrically connected to the image acquisition and computing unit.
本申请的某些实施例中,所述控制系统与所述激光光源电性连接,所述激光光源可调窄带激光光源或宽带激光光源。In certain embodiments of the present application, the control system is electrically connected to the laser light source, and the laser light source may be an adjustable narrow-band laser light source or a broadband laser light source.
本申请还提供用于光导纤维透过率及数值孔径的检测方法,基于前述的检测装置实施,检测方法包括:The present application also provides a method for detecting the transmittance and numerical aperture of an optical fiber. The method is implemented based on the aforementioned detection device and includes:
根据成像相机的光斑调整激光光源的位置和角度,使激光光源和成像相机处于同一光轴;Adjust the position and angle of the laser light source according to the light spot of the imaging camera so that the laser light source and the imaging camera are on the same optical axis;
将待测光纤放入第二光纤固定架,调节第二光纤固定架使激光光源、待测光纤、成像相机三者处于同一光轴;Place the optical fiber to be tested into the second optical fiber fixing frame, and adjust the second optical fiber fixing frame so that the laser light source, the optical fiber to be tested, and the imaging camera are on the same optical axis;
调节第一透镜组和第一光纤固定架之间的距离,使测试光束以不同的数值孔径入射待测光纤,并通过成像相机得到的光斑计算待测光纤的数值孔径。The distance between the first lens group and the first optical fiber fixing frame is adjusted so that the test light beam is incident on the optical fiber to be tested with different numerical apertures, and the numerical aperture of the optical fiber to be tested is calculated through the light spot obtained by the imaging camera.
本申请的某些实施例中,调节第二光纤固定架时,分别对待测光纤的前端面和后端面成像并记录光斑质心位置坐标,当两次光斑质心位置坐标一致,视为完成激光光源、待测光纤、成像相机三者的共轴调试。In certain embodiments of the present application, when adjusting the second optical fiber fixing bracket, the front end face and the rear end face of the optical fiber to be tested are imaged respectively and the coordinates of the centroid position of the light spot are recorded. When the coordinates of the centroid position of the light spot are consistent twice, the coaxial debugging of the laser light source, the optical fiber to be tested, and the imaging camera is considered to be completed.
本申请的实施例至少具有以下有益效果:检测装置在出射光纤与待测光纤之间设置第一透镜组避免物料撞坏的情况发生,通过调节第一透镜组和出射光纤之间的距离,使测试光束
以不同的入射锥角进入待测光纤,可以在测试透过率的同时借助成像相机测试待测光纤输出的光斑形貌数据来计算待测光纤的数值孔径。The embodiments of the present application have at least the following beneficial effects: the detection device sets a first lens group between the output optical fiber and the optical fiber to be tested to prevent the material from being damaged, and the distance between the first lens group and the output optical fiber is adjusted to make the test beam By entering the optical fiber under test at different incident cone angles, the transmittance can be tested while the numerical aperture of the optical fiber under test can be calculated by measuring the light spot morphology data output by the optical fiber under test with the help of an imaging camera.
本申请的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解,其中:The above and/or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:
图1为用于光纤传像元件透过率及数值孔径的检测装置的结构示意图。FIG. 1 is a schematic diagram of the structure of a device for detecting the transmittance and numerical aperture of an optical fiber imaging element.
附图标记:110、激光光源;120、第一光纤固定架;121、出射光纤;201、第一凸透镜;202、第二凸透镜;300、第二光纤固定架;410、物镜;420、分光棱镜;430、聚光镜组;510、光功率计;520、成像相机;610、第一移动平台;620、第二移动平台;630、第三移动平台;700、控制系统;800、固定平台。Figure numerals: 110, laser light source; 120, first optical fiber fixing bracket; 121, output optical fiber; 201, first convex lens; 202, second convex lens; 300, second optical fiber fixing bracket; 410, objective lens; 420, beam splitter prism; 430, condenser lens group; 510, optical power meter; 520, imaging camera; 610, first mobile platform; 620, second mobile platform; 630, third mobile platform; 700, control system; 800, fixed platform.
下面结合图1详细描述本申请的实施例,所述实施例的示例在附图中示出,其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的,仅用于解释本申请,而不能理解为对本申请的限制。The embodiments of the present application are described in detail below in conjunction with FIG1 , and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.
在本申请的描述中,需要理解的是,若出现术语“中心”、“中部”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本申请和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本申请的限制。限定有“第一”、“第二”的特征是用于区分特征名称,而非具有特殊含义,此外,限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请的描述中,除非另有说明,“多个”的含义是两个或两个以上。In the description of the present application, it should be understood that if the terms "center", "middle", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like are used to indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The features defined as "first" and "second" are used to distinguish the feature names, rather than having special meanings. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.
在本申请的描述中,需要说明的是,除非另有明确的规定和限定,术语“安装”、“相连”、“连接”应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或一体地连接;可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通。对于本领域的普通技术人员而言,可以具体情况理解上述术语在本申请中的具体含义。In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
随着光通信技术的飞速发展,光导纤维即光纤的应用已非常普及。在光学中,光纤的数值孔径描述了光进出光纤时的锥角大小,表示光纤接收入射光的能力。在光纤通信系统中,
对光纤的数值孔径有一定的要求,通常为了最有效地把光射入到光纤中去,应采用其数值孔径与光纤数值孔径相同的透镜进行集光。透过率则是光学器件传输光能力大小的直接表征。因此,准确地测量数值孔径及透过率对于衡量光纤产品的质量十分有意义。现行产品中,测试系统无法同时完成光纤产品数值孔径及透过率的测试,且存在测试可重复性低、调试复杂、物料易撞坏等多重问题。With the rapid development of optical communication technology, the application of optical fiber has become very popular. In optics, the numerical aperture of an optical fiber describes the cone angle when light enters and exits the optical fiber, indicating the ability of the optical fiber to receive incident light. In optical fiber communication systems, There are certain requirements for the numerical aperture of optical fiber. Usually, in order to most effectively inject light into the optical fiber, a lens with the same numerical aperture as the optical fiber should be used to collect light. Transmittance is a direct representation of the optical device's ability to transmit light. Therefore, accurately measuring the numerical aperture and transmittance is very meaningful for measuring the quality of optical fiber products. In current products, the test system cannot complete the test of the numerical aperture and transmittance of optical fiber products at the same time, and there are multiple problems such as low test repeatability, complex debugging, and easy damage to materials.
本申请涉及用于光导纤维透过率及数值孔径的检测装置,检测装置包括激光光源110、第一光纤固定架120、第一透镜组、第二光纤固定架300、第二透镜组、光功率计510、成像相机520,激光光源110通过出射光纤121输出测试光束;第一光纤固定架120用于固定出射光纤121的输出端;第一透镜组与第一光纤固定架120之间的距离可调节,第一透镜组用于整形出射光纤121输出的测试光束;第二光纤固定架300用于固定待测光纤;第二透镜组用于整形待测光纤输出的测试光束;光功率计510用于获取测试光束经行待测光纤的透过率;成像相机520用于测试光斑形貌数据。检测装置在出射光纤121与待测光纤之间设置第一透镜组以避免物料撞坏的情况发生,通过调节第一透镜组和出射光纤121之间的距离,使测试光束以不同的入射锥角进入待测光纤,可以在测试透过率的同时借助成像相机520测试待测光纤输出的光斑形貌数据来计算待测光纤的数值孔径。The present application relates to a detection device for the transmittance and numerical aperture of an optical fiber. The detection device includes a laser light source 110, a first optical fiber fixing frame 120, a first lens group, a second optical fiber fixing frame 300, a second lens group, an optical power meter 510, and an imaging camera 520. The laser light source 110 outputs a test beam through an output optical fiber 121; the first optical fiber fixing frame 120 is used to fix the output end of the output optical fiber 121; the distance between the first lens group and the first optical fiber fixing frame 120 is adjustable, and the first lens group is used to shape the test beam output by the output optical fiber 121; the second optical fiber fixing frame 300 is used to fix the optical fiber to be tested; the second lens group is used to shape the test beam output by the optical fiber to be tested; the optical power meter 510 is used to obtain the transmittance of the test beam passing through the optical fiber to be tested; and the imaging camera 520 is used to test the light spot morphology data. The detection device sets a first lens group between the output optical fiber 121 and the optical fiber to be tested to avoid material damage. By adjusting the distance between the first lens group and the output optical fiber 121, the test light beam enters the optical fiber to be tested with different incident cone angles. While testing the transmittance, the imaging camera 520 can be used to test the spot morphology data output by the optical fiber to be tested to calculate the numerical aperture of the optical fiber to be tested.
可以理解的是,通过调节第一光纤固定架120与第一透镜组之间的距离,可以使测试光束以不同锥角入射第一透镜组,进而经过第一透镜组的两次折射,改变光束从第一透镜组出射的锥角,改变光束的发散程度实现光束的整形,使光束以不同的数值孔径入射待测光纤。It can be understood that by adjusting the distance between the first optical fiber fixing frame 120 and the first lens group, the test light beam can be incident on the first lens group at different cone angles, and then refracted twice by the first lens group, the cone angle of the light beam emitted from the first lens group is changed, and the divergence degree of the light beam is changed to achieve light beam shaping, so that the light beam is incident on the optical fiber to be tested with different numerical apertures.
进一步地,第二透镜组包括物镜410、聚光镜组430、分光棱镜420,物镜410设置在第二光纤固定架300之后,物镜410将待测光纤输出的光束整形成为平行光束;聚光镜组430设置在物镜410之后,聚光镜组430将平行光束聚焦成像并输出至成像相机520;分光棱镜420设置在物镜410与聚光镜组430之间,分光棱镜420将测试光束分为第一光束和第二光束,第一光束输出至光功率计510,第二光束经由聚光镜组430输出至成像相机520。可以理解,第二透镜组中,可以根据产品的光斑要求选用不同倍率的物镜410,聚光镜组430与不同倍率的物镜410组合成指定方法倍率的图像,并输出光斑至成像相机520处测试光斑的形貌数据,以适于多规格的光纤产品测试。本实施例中,第一光束和第二光束相互垂直。Further, the second lens group includes an objective lens 410, a condenser lens group 430, and a beam splitter 420. The objective lens 410 is arranged behind the second optical fiber fixing frame 300, and the objective lens 410 shapes the light beam output by the optical fiber to be tested into a parallel light beam; the condenser lens group 430 is arranged behind the objective lens 410, and the condenser lens group 430 focuses the parallel light beam into an image and outputs it to the imaging camera 520; the beam splitter 420 is arranged between the objective lens 410 and the condenser lens group 430, and the beam splitter 420 splits the test light beam into a first light beam and a second light beam, the first light beam is output to the optical power meter 510, and the second light beam is output to the imaging camera 520 via the condenser lens group 430. It can be understood that in the second lens group, objective lenses 410 with different magnifications can be selected according to the light spot requirements of the product, and the condenser lens group 430 and the objective lenses 410 with different magnifications are combined into an image of a specified method magnification, and the morphological data of the test light spot at the light spot to the imaging camera 520 are output, so as to be suitable for the testing of optical fiber products of multiple specifications. In this embodiment, the first light beam and the second light beam are perpendicular to each other.
进一步地,测试装置包括第一移动平台610、第二移动平台620、第三移动平台630,激光光源110、第一光纤固定架120、第一透镜组安装于第一移动平台610,第二光纤固定架300安装于第二移动平台620,第二透镜组、光功率计510、成像相机520安装于第三移动平台630,第三移动平台630与第二移动平台620之间的距离可调节。可以理解,调节第一移动平台610和第二移动平台620之间的距离以使得测试光束以不同的数值孔径入射待测光纤,调
节第二移动平台620和第三移动平台630之间的距离以使得待测光纤出射的测试光束调整到不同位置进行光斑测试。Further, the test device includes a first mobile platform 610, a second mobile platform 620, and a third mobile platform 630. The laser light source 110, the first optical fiber fixing frame 120, and the first lens group are installed on the first mobile platform 610. The second optical fiber fixing frame 300 is installed on the second mobile platform 620. The second lens group, the optical power meter 510, and the imaging camera 520 are installed on the third mobile platform 630. The distance between the third mobile platform 630 and the second mobile platform 620 is adjustable. It can be understood that the distance between the first mobile platform 610 and the second mobile platform 620 is adjusted so that the test beam is incident on the optical fiber to be tested with different numerical apertures. The distance between the second movable platform 620 and the third movable platform 630 is adjusted so that the test light beam emitted from the optical fiber to be tested is adjusted to different positions for spot testing.
具体地,本实施例中,第一移动平台610、第二移动平台620均设置为五轴可调节平台,以使得激光光源110、第一透镜组、待测光纤等元件在调整位置的同时还可以对角度进行调节,以完成共轴调试或其他产品测试,满足不同应用场景需求。Specifically, in this embodiment, the first mobile platform 610 and the second mobile platform 620 are both configured as five-axis adjustable platforms, so that the laser light source 110, the first lens group, the optical fiber to be tested and other components can adjust their angles while adjusting their positions, so as to complete coaxial debugging or other product testing and meet the needs of different application scenarios.
可以理解,检测装置包括控制系统700,控制系统700包括轴调节反馈单元,轴调节反馈单元分别与第一移动平台610、第二移动平台620、第三移动平台630电性连接。具体地,轴调节反馈单元包括PLC和对应第一移动平台610、第二移动平台620、第三移动平台630设置的三个伺服电机,PLC发送相应指令给指定的伺服电机以驱使其所对应的移动平台运动,以完成位置调节。It can be understood that the detection device includes a control system 700, and the control system 700 includes an axis adjustment feedback unit, which is electrically connected to the first mobile platform 610, the second mobile platform 620, and the third mobile platform 630. Specifically, the axis adjustment feedback unit includes a PLC and three servo motors corresponding to the first mobile platform 610, the second mobile platform 620, and the third mobile platform 630. The PLC sends corresponding instructions to the specified servo motor to drive the corresponding mobile platform to move, so as to complete the position adjustment.
进一步地,控制系统700包括图像采集计算单元,图像采集计算单元与成像相机520电性连接,轴调节反馈单元与图像采集计算单元电性连接。可以理解,图像采集计算单元用于分析成像相机520测试得到的光斑形貌数据。具体地,本实施例中,图像采集计算单元通过视觉算法对光斑图片处理获取产品坐标,根据待测光纤前端面成像和后端面成型的光斑质心坐标差值,将坐标偏差反馈给PLC进行处理,再由PLC发送指令驱使电机运动到相应位置完成测试。Furthermore, the control system 700 includes an image acquisition and calculation unit, which is electrically connected to the imaging camera 520, and the axis adjustment feedback unit is electrically connected to the image acquisition and calculation unit. It can be understood that the image acquisition and calculation unit is used to analyze the spot morphology data obtained by the imaging camera 520 test. Specifically, in this embodiment, the image acquisition and calculation unit processes the spot image through a visual algorithm to obtain the product coordinates, and according to the coordinate difference of the center of mass of the spot formed by the front end face imaging and the rear end face of the optical fiber to be tested, the coordinate deviation is fed back to the PLC for processing, and then the PLC sends an instruction to drive the motor to move to the corresponding position to complete the test.
进一步地,控制系统700与激光光源110电性连接,激光光源110可调窄带激光光源或宽带激光光源。相对于现有技术中的单一输入光源,本申请可以通过控制系统700调节激光光源110以进行满足多种测试需求。Furthermore, the control system 700 is electrically connected to the laser light source 110, and the laser light source 110 can be an adjustable narrowband laser light source or a broadband laser light source. Compared with the single input light source in the prior art, the present application can adjust the laser light source 110 through the control system 700 to meet various test requirements.
进一步地,第一透镜组包括两个凸透镜,两个凸透镜的凸面相背设置,调节出射光纤121输出端到第一透镜组的距离以调节光源入射至待测光纤处的数值孔径。本实施例中,第一凸透镜201和第二凸透镜202设置为单面凸透镜,可以理解,调节出射光纤121到第一透镜组之间的距离,测试光束以不同的入射角入射第一凸透镜201,整形光束并改变其发散角度后入射至第二凸透镜202处进行聚焦,最终达到调节测试光束入射至待测光纤的数值孔径的目的。在其他实施例中,考虑到不同的光束整形需求,第一透镜组还可以增加柱面镜或其他透镜以进一步整形出射光纤处射出的测试光束。Furthermore, the first lens group includes two convex lenses, and the convex surfaces of the two convex lenses are arranged opposite to each other. The distance from the output end of the output optical fiber 121 to the first lens group is adjusted to adjust the numerical aperture of the light source incident on the optical fiber to be tested. In this embodiment, the first convex lens 201 and the second convex lens 202 are set as single-sided convex lenses. It can be understood that by adjusting the distance between the output optical fiber 121 and the first lens group, the test light beam is incident on the first convex lens 201 at different incident angles, and the light beam is shaped and its divergence angle is changed. Then, it is incident on the second convex lens 202 for focusing, and finally the purpose of adjusting the numerical aperture of the test light beam incident on the optical fiber to be tested is achieved. In other embodiments, considering different beam shaping requirements, the first lens group can also add cylindrical mirrors or other lenses to further shape the test light beam emitted from the output optical fiber.
进一步地,测试装置包括固定平台800,第一移动平台610、第二移动平台620、第三移动平台630安装于固定平台800。具体地,固定平台800安装有橡胶阻尼隔振垫,橡胶阻尼隔振垫用于增强固定平台800的抗震性。Further, the testing device includes a fixed platform 800, and the first mobile platform 610, the second mobile platform 620, and the third mobile platform 630 are installed on the fixed platform 800. Specifically, the fixed platform 800 is installed with a rubber damping vibration isolation pad, which is used to enhance the seismic resistance of the fixed platform 800.
进一步地,固定平台800安装有水平轴承调节机构,可以理解,水平轴承调节机构用于调节固定平台800的水平以确保测试结果的精度。装有水平轴承调节机构的固定平台800属
于本领域内常见的光学平台设备,此处不再赘述。Furthermore, the fixed platform 800 is equipped with a horizontal bearing adjustment mechanism. It can be understood that the horizontal bearing adjustment mechanism is used to adjust the level of the fixed platform 800 to ensure the accuracy of the test results. The common optical platform equipment in this field will not be described in detail here.
一些实施例中,检测装置包括黑箱,可以理解,黑箱用于避免环境光源对检测装置的影响。具体地,黑箱可以罩设固定平台800设置,保护整个检测装置免于环境光源的影响;黑箱也可以单独罩设激光光源110到第二光纤固定架300的部分,即单独罩设第一移动平台610及第二移动平台620的部分。In some embodiments, the detection device includes a black box, and it can be understood that the black box is used to prevent the influence of the ambient light source on the detection device. Specifically, the black box can cover the fixed platform 800 to protect the entire detection device from the influence of the ambient light source; the black box can also cover the part from the laser light source 110 to the second optical fiber fixing frame 300, that is, the part of the first mobile platform 610 and the second mobile platform 620.
本申请还涉及用于光导纤维透过率及数值孔径的检测方法,基于前述的检测装置实施,检测方法包括:The present application also relates to a method for detecting the transmittance and numerical aperture of an optical fiber. Based on the aforementioned detection device, the detection method includes:
根据成像相机520的光斑调整激光光源110的位置和角度,使激光光源110和成像相机520处于同一光轴;Adjust the position and angle of the laser light source 110 according to the light spot of the imaging camera 520 so that the laser light source 110 and the imaging camera 520 are on the same optical axis;
将待测光纤放入第二光纤固定架300,调节第二光纤固定架300使激光光源110、待测光纤、成像相机520三者处于同一光轴;Place the optical fiber to be tested into the second optical fiber fixing frame 300, and adjust the second optical fiber fixing frame 300 so that the laser light source 110, the optical fiber to be tested, and the imaging camera 520 are on the same optical axis;
调节第一透镜组和第一光纤固定架120之间的距离,使测试光束以不同的数值孔径入射待测光纤,并通过成像相机520得到的光斑计算待测光纤的数值孔径。The distance between the first lens group and the first optical fiber fixing frame 120 is adjusted so that the test light beam is incident on the optical fiber to be tested with different numerical apertures, and the numerical aperture of the optical fiber to be tested is calculated through the light spot obtained by the imaging camera 520.
具体地,以第一透镜组在不同位置时,成像相机520得到的光斑a和光斑b为例,通过待测光纤成型的光斑计算数值孔径的方法包括:Specifically, taking the light spots a and b obtained by the imaging camera 520 when the first lens group is in different positions as an example, the method for calculating the numerical aperture through the light spot formed by the optical fiber to be tested includes:
设光斑a的质心横坐标为Xamm,光斑a的直径为Damm,光斑b的质心横坐标为Xbmm,光斑b的直径为Dbmm,计算待测光纤的数值孔径为NA=sin(atan((Db-Da)/2)/(Xb-Xa))。Assume that the centroid abscissa of spot a is Xa mm, the diameter of spot a is Da mm, the centroid abscissa of spot b is Xb mm, the diameter of spot b is Db mm, and the numerical aperture of the optical fiber to be tested is calculated as NA = sin(atan(( Db - Da )/2)/( Xb - Xa )).
进一步地,调节第二光纤固定架300时,分别对待测光纤的前端面和后端面成像并记录光斑质心位置坐标,当两次光斑质心位置坐标一致,视为完成激光光源110、待测光纤、成像相机520三者的共轴调试。Furthermore, when adjusting the second optical fiber fixing bracket 300, the front end face and the rear end face of the optical fiber to be tested are imaged respectively and the coordinates of the centroid position of the light spot are recorded. When the coordinates of the centroid position of the two light spots are consistent, the coaxial debugging of the laser light source 110, the optical fiber to be tested and the imaging camera 520 is considered to be completed.
具体地,以一次共轴调试过程为例,设待测光纤前端面成像的光斑质心为视野中心,待测光纤后端面成像的光斑质心存在X轴方向偏差A1,Y轴方向偏差B1,轴调节反馈单元驱使第二移动平台620以使光斑质心沿X轴向中心方向移动,移动量A2为A1/2,重复调节至光斑质心与视野中心重合,再驱使第二移动平台620以使光斑质心沿Y轴向中心方向移动,移动量B2为B1/2。重复调节至光斑质心与视野中心重合,即视为完成共轴调试。Specifically, taking a coaxial debugging process as an example, assuming that the centroid of the light spot imaged by the front end face of the optical fiber to be tested is the center of the field of view, and the centroid of the light spot imaged by the rear end face of the optical fiber to be tested has an X-axis deviation A 1 and a Y-axis deviation B 1 , the axis adjustment feedback unit drives the second mobile platform 620 to move the centroid of the light spot along the X-axis toward the center, and the movement amount A 2 is A 1 /2, and the adjustment is repeated until the centroid of the light spot coincides with the center of the field of view, and then the second mobile platform 620 is driven to move the centroid of the light spot along the Y-axis toward the center, and the movement amount B 2 is B 1 /2. Repeated adjustment until the centroid of the light spot coincides with the center of the field of view is considered to be completed.
在本说明书的描述中,若出现参考术语“一个实施例”、“一些实例”、“一些实施例”、“示意性实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一个实施例或示例中。在本说明书中,对上述术语的示意性表述不一定指的是相同的实施例或示例。而且,描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。In the description of this specification, if the reference terms "one embodiment", "some examples", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" appear, it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
以上结合附图对本申请的实施方式作了详细说明,但是本申请不限于上述实施方式,在
所述技术领域普通技术人员所具备的知识范围内,还可以在不脱离本申请宗旨的前提下作出各种变化。
The above describes the implementation methods of the present application in detail in conjunction with the accompanying drawings, but the present application is not limited to the above implementation methods. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of this application.
Claims (10)
- 用于光导纤维透过率及数值孔径的检测装置,包括:The detection device for optical fiber transmittance and numerical aperture includes:激光光源(110),所述激光光源(110)通过出射光纤(121)输出测试光束;A laser light source (110), wherein the laser light source (110) outputs a test light beam through an output optical fiber (121);第一光纤固定架(120),所述第一光纤固定架(120)用于固定所述出射光纤(121)的输出端;A first optical fiber fixing frame (120), the first optical fiber fixing frame (120) being used to fix the output end of the output optical fiber (121);第一透镜组,所述第一透镜组与所述第一光纤固定架(120)之间的距离可调节,所述第一透镜组用于整形所述出射光纤(121)输出的测试光束;a first lens group, wherein the distance between the first lens group and the first optical fiber fixing frame (120) is adjustable, and the first lens group is used for shaping the test light beam output by the output optical fiber (121);第二光纤固定架(300),所述第二光纤固定架(300)用于固定待测光纤;A second optical fiber fixing frame (300), the second optical fiber fixing frame (300) being used to fix the optical fiber to be tested;第二透镜组,所述第二透镜组用于整形待测光纤输出的测试光束;A second lens group, wherein the second lens group is used to shape a test light beam output by the optical fiber to be tested;光功率计(510),所述光功率计(510)用于获取测试光束经行待测光纤的透过率;An optical power meter (510), the optical power meter (510) being used to obtain the transmittance of a test light beam passing through the optical fiber to be tested;成像相机(520),所述成像相机(520)用于测试光斑形貌数据。An imaging camera (520), wherein the imaging camera (520) is used to test light spot shape data.
- 根据权利要求1所述的用于光导纤维透过率及数值孔径的检测装置,其中:所述第一透镜组包括两个凸透镜,两个所述凸透镜的凸面相背设置,调节所述出射光纤(121)输出端到所述第一透镜组的距离以调节光源入射至待测光纤处的数值孔径。According to claim 1, the detection device for optical fiber transmittance and numerical aperture, wherein: the first lens group includes two convex lenses, the convex surfaces of the two convex lenses are arranged opposite to each other, and the distance from the output end of the output optical fiber (121) to the first lens group is adjusted to adjust the numerical aperture of the light source incident on the optical fiber to be tested.
- 根据权利要求1所述的用于光导纤维透过率及数值孔径的检测装置,其中,所述第二透镜组包括:The device for detecting transmittance and numerical aperture of an optical fiber according to claim 1, wherein the second lens group comprises:物镜(410),所述物镜(410)设置在所述第二光纤固定架(300)之后,所述物镜(410)将待测光纤输出的光束整形成为平行光束;an objective lens (410), the objective lens (410) being arranged behind the second optical fiber fixing frame (300), and the objective lens (410) shaping the light beam output by the optical fiber to be tested into a parallel light beam;聚光镜组(430),所述聚光镜组(430)设置在所述物镜(410)之后,所述聚光镜组(430)将平行光束聚焦成像并输出至所述成像相机(520);A condenser lens group (430), the condenser lens group (430) being arranged behind the objective lens (410), the condenser lens group (430) focusing the parallel light beam into an image and outputting the image to the imaging camera (520);分光棱镜(420),所述分光棱镜(420)设置在所述物镜(410)与所述聚光镜组(430)之间,所述分光棱镜(420)将测试光束分为第一光束和第二光束,所述第一光束输出至所述光功率计(510),所述第二光束经由所述聚光镜组(430)输出至所述成像相机(520)。A beam splitter prism (420) is arranged between the objective lens (410) and the condenser lens group (430), and the beam splitter prism (420) splits the test light beam into a first light beam and a second light beam, wherein the first light beam is output to the optical power meter (510), and the second light beam is output to the imaging camera (520) via the condenser lens group (430).
- 根据权利要求1所述的用于光导纤维透过率及数值孔径的检测装置,其中:测试装置包括第一移动平台(610)、第二移动平台(620)、第三移动平台(630),所述激光光源(110)、所述第一光纤固定架(120)、所述第一透镜组安装于所述第一移动平台(610),所述第二光纤固定架(300)安装于所述第二移动平台(620),所述第二透镜组、所述光功率计(510)、所述成像相机(520)安装于所述第三移动平台(630),所述第一移动平台(610)、所述第二移动平台(620)均设置为五轴可调节平台,所述第三移动平台(630)与所述第二移动平台(620)之间的距离可调节。According to claim 1, the detection device for optical fiber transmittance and numerical aperture, wherein: the testing device comprises a first mobile platform (610), a second mobile platform (620), and a third mobile platform (630); the laser light source (110), the first optical fiber fixing frame (120), and the first lens group are installed on the first mobile platform (610); the second optical fiber fixing frame (300) is installed on the second mobile platform (620); the second lens group, the optical power meter (510), and the imaging camera (520) are installed on the third mobile platform (630); the first mobile platform (610) and the second mobile platform (620) are both configured as five-axis adjustable platforms; and the distance between the third mobile platform (630) and the second mobile platform (620) is adjustable.
- 根据权利要求4所述的用于光导纤维透过率及数值孔径的检测装置,其中:检测装置 包括固定平台(800),所述第一移动平台(610)、所述第二移动平台(620)、所述第三移动平台(630)安装于所述固定平台(800),所述固定平台(800)安装有橡胶阻尼隔振垫和水平轴承调节机构,所述水平轴承调节机构用于调节所述固定平台(800)的水平以确保测试结果的精度,所述橡胶阻尼隔振垫用于增强所述固定平台(800)的抗震性。The detection device for optical fiber transmittance and numerical aperture according to claim 4, wherein: The invention comprises a fixed platform (800), wherein the first mobile platform (610), the second mobile platform (620), and the third mobile platform (630) are installed on the fixed platform (800), and the fixed platform (800) is provided with a rubber damping vibration isolation pad and a horizontal bearing adjustment mechanism, wherein the horizontal bearing adjustment mechanism is used to adjust the level of the fixed platform (800) to ensure the accuracy of the test result, and the rubber damping vibration isolation pad is used to enhance the seismic resistance of the fixed platform (800).
- 根据权利要求4所述的用于光导纤维透过率及数值孔径的检测装置,其中:检测装置包括控制系统(700),所述控制系统(700)包括轴调节反馈单元,所述轴调节反馈单元分别与所述第一移动平台(610)、所述第二移动平台(620)、所述第三移动平台(630)电性连接。According to claim 4, the detection device for optical fiber transmittance and numerical aperture, wherein: the detection device includes a control system (700), the control system (700) includes an axis adjustment feedback unit, and the axis adjustment feedback unit is electrically connected to the first movable platform (610), the second movable platform (620), and the third movable platform (630), respectively.
- 根据权利要求6所述的用于光导纤维透过率及数值孔径的检测装置,其中:所述控制系统(700)包括图像采集计算单元,所述图像采集计算单元与所述成像相机(520)电性连接,所述轴调节反馈单元与所述图像采集计算单元电性连接。According to claim 6, the detection device for optical fiber transmittance and numerical aperture, wherein: the control system (700) includes an image acquisition and calculation unit, the image acquisition and calculation unit is electrically connected to the imaging camera (520), and the axis adjustment feedback unit is electrically connected to the image acquisition and calculation unit.
- 根据权利要求7所述的用于光导纤维透过率及数值孔径的检测装置,其中:所述控制系统(700)与所述激光光源(110)电性连接,所述激光光源(110)可调窄带激光光源或宽带激光光源。According to the detection device for optical fiber transmittance and numerical aperture as described in claim 7, wherein: the control system (700) is electrically connected to the laser light source (110), and the laser light source (110) can be an adjustable narrow-band laser light source or a broadband laser light source.
- 用于光导纤维透过率及数值孔径的检测方法,基于如权利要求1至8任一项所述的检测装置实施,其中:A method for detecting transmittance and numerical aperture of an optical fiber, implemented based on the detection device according to any one of claims 1 to 8, wherein:根据成像相机的光斑调整激光光源的位置和角度,使激光光源和成像相机处于同一光轴;Adjust the position and angle of the laser light source according to the light spot of the imaging camera so that the laser light source and the imaging camera are on the same optical axis;将待测光纤放入第二光纤固定架,调节第二光纤固定架使激光光源、待测光纤、成像相机三者处于同一光轴;Place the optical fiber to be tested into the second optical fiber fixing frame, and adjust the second optical fiber fixing frame so that the laser light source, the optical fiber to be tested, and the imaging camera are on the same optical axis;调节第一透镜组和第一光纤固定架之间的距离,使测试光束以不同的数值孔径入射待测光纤,并通过成像相机得到的光斑计算待测光纤的数值孔径。The distance between the first lens group and the first optical fiber fixing frame is adjusted so that the test light beam is incident on the optical fiber to be tested with different numerical apertures, and the numerical aperture of the optical fiber to be tested is calculated through the light spot obtained by the imaging camera.
- 根据权利要求9所述的用于光导纤维透过率及数值孔径的检测方法,其中:调节第二光纤固定架时,分别对待测光纤的前端面和后端面成像并记录光斑质心位置坐标,当两次光斑质心位置坐标一致,视为完成激光光源、待测光纤、成像相机三者的共轴调试。 According to the detection method for optical fiber transmittance and numerical aperture of claim 9, wherein: when adjusting the second optical fiber fixing frame, the front end face and the rear end face of the optical fiber to be tested are imaged respectively and the coordinates of the centroid position of the light spot are recorded, and when the coordinates of the centroid position of the light spot are consistent twice, it is considered that the coaxial debugging of the laser light source, the optical fiber to be tested, and the imaging camera is completed.
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CN106568581A (en) * | 2016-11-15 | 2017-04-19 | 中电科天之星激光技术(上海)有限公司 | Optical fiber numerical aperture measuring method |
CN112903249A (en) * | 2021-03-02 | 2021-06-04 | 武汉睿芯特种光纤有限责任公司 | Cladding numerical aperture measuring device of double-cladding optical fiber |
CN113203548A (en) * | 2021-03-23 | 2021-08-03 | 中国工程物理研究院激光聚变研究中心 | Device and method for testing loss of double-clad optical fiber core |
CN115839826A (en) * | 2022-11-03 | 2023-03-24 | 长园视觉科技(珠海)有限公司 | Detection device and detection method for transmittance and numerical aperture of optical fiber |
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