CN219037919U - Device for measuring included angle between slow axis of polarization maintaining jumper and K key of connector - Google Patents

Abstract

The utility model discloses a device for measuring an included angle between a slow axis of a polarization maintaining jumper and a K key of a connector, which comprises a first collimator, a polarizer, a second collimator, a third collimator, an optical power meter and a polarization analyzer, wherein the first collimator, the polarizer, the second collimator, the third collimator, the optical power meter and the polarization analyzer are sequentially arranged in the horizontal direction; the first collimator is installed on one collimator fixing mechanism, the second collimator is installed on the other collimator fixing mechanism, the third collimator is installed on the other collimator fixing mechanism, and the first collimator, the second collimator and the third collimator are coaxial. The utility model is used for measuring the included angle between the slow axis of the polarization maintaining jumper and the K key of the connector, has simple light path, convenient adjustment and more accurate test result.

Description

Device for measuring included angle between slow axis of polarization maintaining jumper and K key of connector

Technical Field

The utility model relates to the field of communication equipment, in particular to a device for measuring an included angle between a slow axis of a polarization maintaining jumper and a K key of a connector.

Background

With the informatization of society, optical fiber technology is gradually going deep into various fields of society, and special optical fiber is used as the future development direction of optical fiber technology and has very wide application in various fields. Particularly, the polarization-maintaining optical fiber which can be used for optical fiber sensing is more and more widely applied to optical fiber communication and optical fiber sensing systems due to the fact that the polarization-maintaining optical fiber has stronger polarization maintaining capability on linearly polarized light and good compatibility with common single-mode optical fibers. Polarization maintaining fibers are commonly used in applications that are relatively sensitive to polarization, such as interferometers, or lasers, or in the connection between a light source and an external modulator, etc.

The polarization maintaining fiber is used for realizing the polarization maintaining principle, the polarization direction of polarized light is aligned with one axis, and the polarization component separated to the other axis is small, so that the polarization state of transmitted light is maintained. Polarization maintaining jumper wires realize coupling alignment of polarization modes through accurate connector key positions. Compared with the traditional optical fiber jumper, the polarization maintaining jumper has the advantages that the polarization maintaining optical fiber transmits polarized light signals, the linear polarization direction can be kept unchanged, the coherent signal to noise ratio is improved, the high-precision measurement of physical quantity is realized, and the like.

The polarization maintaining connector is an important component for coupling two polarization maintaining optical fibers, so that the original polarization state of polarized light is maintained in the polarization mode of the two polarization maintaining optical fibers during coupling, and high extinction ratio is maintained for transmission. Therefore, the slow axis or the fast axis in the two optical fibers are accurately butted, and the angle error is reduced as much as possible, so that the included angle between the slow axis of the polarization maintaining jumper and the K key of the connector is required to be measured.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model provides a device for measuring the included angle between the slow axis of the polarization maintaining jumper and the K key of the connector, which is used for solving at least one of the technical problems.

The utility model is realized by the following technical scheme:

the device for measuring the included angle between the slow axis of the polarization maintaining jumper and the K key of the connector comprises a first collimator, a polarizer, a second collimator, a third collimator, an optical power meter and a polarization analyzer which are sequentially arranged in the horizontal direction; the first collimator is installed on one collimator fixing mechanism, the second collimator is installed on the other collimator fixing mechanism, the third collimator is installed on the other collimator fixing mechanism, and the first collimator, the second collimator and the third collimator are coaxial.

When the device provided in the technical scheme is adopted to measure the included angle between the slow axis of the polarization maintaining wire and the K key of the connector, the polarization maintaining wire is connected between the second collimator and the third collimator through the optical fiber connector, the position of the optical fiber connector is adjusted firstly, the K key of the optical fiber connector is vertical to the horizontal plane, then the positions of the first collimator and the second collimator are adjusted, the light output by the first collimator and the light output by the second collimator are vertical to the polarizer, the power meter is further observed, the first collimator and the second collimator are adjusted, the light output by the first collimator and the light output by the second collimator are overlapped, the included angle in the vertical direction of polarized light is observed through the polarization analyzer after the power meter is removed, and the included angle is the included angle between the slow axis of the polarization maintaining wire and the K key.

Further, the collimator fixing mechanism provided with the first collimator is arranged on one five-dimensional adjusting frame, and the collimator fixing mechanism provided with the second collimator is arranged on the other five-dimensional adjusting frame.

The first collimator and the second collimator are respectively arranged on the two five-dimensional adjusting frames, and the positions of the first collimator and the second collimator can be accurately adjusted by adjusting the five-dimensional adjusting frames.

Further, the five-dimensional adjusting frames comprise 5 knobs, and the 5 knobs are left and right adjusting knobs, front and back adjusting knobs, height adjusting knobs, pitching adjusting knobs and horizontal rotating knobs respectively.

The position of the first collimator and the second collimator can be adjusted by rotating the knob on the five-dimensional adjusting frame, and the adjusting process is simple and convenient.

Further, the collimator fixing mechanism is a polarizer adjusting frame.

Further, the polarizer adjusting frame comprises a pitching adjusting mechanism and a rotating adjusting mechanism, wherein the pitching adjusting mechanism comprises an L-shaped pitching bracket, an extension spring is arranged on the L-shaped pitching bracket, one end of the extension spring is fixed on the L-shaped pitching bracket, and the other end of the extension spring is connected with the rotating adjusting mechanism; the rotary adjusting mechanism comprises an L-shaped rotary support, a Z-direction rotary mechanism is arranged on the L-shaped rotary support, the Z-direction rotary mechanism is located at the middle position of the L-shaped rotary support and is rotationally connected with the rotary support, and a through hole is formed in the middle position of the L-shaped rotary support.

When the collimator is fixed, the collimator is arranged in the through hole of the L-shaped rotating support, then the collimator is fixed through the screw, and the rotation of the collimator can be realized through rotating the L-shaped rotating support.

Further, the Z-direction rotating mechanism comprises a dial, the end face of the dial is provided with 0-360-degree mark lines, and the L-shaped rotating support is marked with alignment scale lines.

The calibration lines aligned with the collimator clamping grooves are aligned with the alignment calibration lines on the frame, and then the polarization maintaining jumper is connected with the collimator, and the K key is vertical to the horizontal plane.

Further, the extinction ratio of the polarizer is 100000:1.

The polarizer has larger extinction ratio, so that the test result is more accurate.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model provides a device for measuring an included angle between a slow axis of a polarization maintaining wire and a K key of a connector, wherein the polarization maintaining wire is connected between a second collimator and a third collimator through an optical fiber connector, the position of the optical fiber connector is adjusted firstly to enable the K key of the optical fiber connector to be perpendicular to a horizontal plane, then the positions of a first collimator and a second collimator are adjusted to enable light output by the first collimator and light output by the second collimator to be perpendicular to a polarizer, further a power meter is observed, the first collimator and the second collimator are adjusted to enable light output by the second collimator of the light output by the first collimator to coincide, and an included angle in the vertical direction of polarized light is observed through a polarization analyzer after the power meter is removed, wherein the included angle is the included angle between the slow axis of the polarization maintaining wire and the K key. The utility model has the advantages of simple measuring light path, convenient adjustment and more accurate test result.

Drawings

FIG. 1 is a schematic view of a device according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a polarizer adjusting frame according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a five-dimensional adjusting frame according to an embodiment of the utility model;

FIG. 4 is a cross-sectional view of a polarization maintaining jumper according to an embodiment of the present utility model;

fig. 5 is a schematic structural view of an optical fiber connector according to an embodiment of the present utility model.

In the figure: 1. a first collimator mount; 101. a set screw; 102. a pitch adjustment mechanism; 103. a rotation adjustment mechanism; 104. a Z-direction rotating mechanism; 105. a dial; 106. a through hole; 107. aligning the scale marks; 2. a second collimator mount; 3. a third collimator mount; 4. a first collimator; 5. a second collimator; 6. a third collimator; 7. a polarizer; 8. an optical power meter; 9. a polarization analyzer; 10. a first optical fiber connector; 11. a second optical fiber connector; 12. a third optical fiber connector; 13. a polarization maintaining jumper wire; 14. a first light source; 15. a first transmission fiber; 16. a second light source; 17. a five-dimensional adjusting frame; 1701. a left-right adjustment knob; 1702. a front-rear adjustment knob; 1703. a height adjustment knob; 1704. a pitch adjustment knob; 1705. the knob is rotated horizontally.

Detailed Description

The following description of the embodiments of the present utility model will be made in detail and with reference to the accompanying drawings, wherein it is apparent that the embodiments described are only some, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

As shown in fig. 1, the embodiment provides a device for measuring an included angle between a slow axis of a polarization maintaining jumper and a K key of a connector, which comprises a first collimator 4, a polarizer 7, a second collimator 5, a third collimator 6, an optical power meter 8 and a polarization analyzer 9, which are sequentially arranged in the horizontal direction; the first collimator 4 is mounted on one collimator fixing mechanism (first collimator fixing bracket 1), the second collimator 5 is mounted on the other collimator fixing mechanism (second collimator fixing bracket 2), the third collimator 6 is mounted on the other collimator fixing mechanism (third collimator fixing bracket 3), and the first collimator 4, the second collimator 5 and the third collimator 6 are coaxial.

The first collimator mount 1 and the second collimator mount 2 are respectively disposed on two five-dimensional adjustment frames 17, as shown in fig. 3, and each five-dimensional adjustment frame 17 includes a left-right adjustment knob 1701, a front-rear adjustment knob 1702, a height adjustment knob 1703, a pitch adjustment knob 1704, and a horizontal rotation knob 1705.

In this embodiment, the first collimator mount 1, the second collimator mount 2, and the third collimator mount 3 are all polarizer adjustment frames, as shown in fig. 2, the structure of the polarizer adjustment frame adopts a structure of a multidimensional adjustment mirror frame disclosed in chinese patent No. CN114895423a, 2022, 8 and 12, and the polarizer adjustment frame includes a pitch adjustment mechanism 102 and a rotation adjustment mechanism 103, the pitch adjustment mechanism includes an L-shaped pitch bracket, an extension spring is provided on the L-shaped pitch bracket, one end of the extension spring is fixed on the L-shaped pitch bracket, and the other end of the extension spring is connected with the rotation adjustment mechanism 103; the rotation adjusting mechanism 103 comprises an L-shaped rotating support, a Z-direction rotating mechanism 104 is arranged on the L-shaped rotating support, the Z-direction rotating mechanism 104 is located at the middle position of the L-shaped rotating support and is rotationally connected with the L-shaped rotating support, a through hole 106 is formed in the middle position of the L-shaped rotating support, the through hole can be used for fixing a collimator, the collimator passes through the through hole, and the collimator is fixed in the through hole through a fixing screw 101, namely, the collimator is fixed on the polarizer adjusting frame.

The Z-direction rotating mechanism comprises a dial 105, wherein 0-360-degree mark lines are arranged on the end face of the dial, and alignment scale lines 107 are marked on the L-shaped rotating support.

In this embodiment, the extinction ratio of the polarizer 7 is 100000:1.

The method for measuring the included angle between the slow axis of the polarization maintaining jumper and the K key of the connector by adopting the device provided by the embodiment comprises the following steps:

s1: after the optical path is built according to fig. 1, when the collimator is fixed on the polarizer adjusting frame, the Z-direction rotating mechanism 104 is rotated to align the scale mark aligned with the collimator clamping groove on the dial 105 with the alignment scale mark 107 on the L-shaped rotating bracket, the polarization maintaining jumper 13 is connected with the second collimator 5 through the second optical fiber connector 11, the first transmission optical fiber 15 is connected with the first collimator 4 through the first optical fiber connector 10, and at this time, the K key of the first optical fiber connector 10 (shown in fig. 5) and the K key of the second optical fiber connector 11 are vertical to the horizontal plane; one end of the first transmission optical fiber 15 far away from the first collimator 4 is connected with a first light source 14, and a light beam generated by the first light source 14 is transmitted 15 to the first collimator 4 through the first transmission optical fiber;

s2: a left-right adjusting knob 1701, a front-rear adjusting knob 1702, a height adjusting knob 1703, a pitch adjusting knob 1704 and a horizontal rotating knob 1705 of the five-dimensional adjusting frame 17 below the first collimator 4 are adjusted so that the light beam emitted by the first light source 14 passes through the first collimator 4 and then vertically enters the polarizer 7;

s3: one end of a polarization maintaining jumper 13, which is close to the third collimator 6, is connected with a second light source 16, and a left-right adjusting knob 1701, a front-back adjusting knob 1702, a height adjusting knob 1703, a pitching adjusting knob 1704 and a horizontal rotating knob 1705 of a five-dimensional adjusting frame 17 below the second collimator 5 are adjusted, so that light output by the second collimator 5 is vertically beaten on the polarizer 7;

s4: the left and right adjusting knobs 1701 and the height adjusting knob 1703 of the two five-dimensional adjusting frames 17 are adjusted so that the light output by the first collimator 4 and the light output by the second collimator 5 are preliminarily overlapped, at the moment, the second light source 16 is removed, and one end of the polarization maintaining jumper 13, which is far away from the second collimator 5, is connected to the third collimator 6 through the third optical fiber connector 12; fine-tuning a pitch adjusting knob 1704 and a horizontal rotating knob 1705 on the two five-dimensional adjusting frames 17, and observing the indication of the optical power meter 8 until the indication reaches the maximum value, wherein the light emitted by the first light source 14 is coupled into the polarization maintaining jumper 13 after passing through the polarizer 7;

s5: the optical power meter 8 is removed, the light output by the third collimator 6 is driven into the polarization analyzer 9, the polarization state of the emergent light is observed, the polarizer is rotated, the light from the polarization maintaining wire 13 is linear polarized light, and the included angle theta (shown in fig. 4) between the linear polarized light and the vertical direction is observed, wherein the included angle is the included angle between the slow axis of the polarization maintaining wire and the K key.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; these modifications or substitutions do not depart from the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present utility model.

Claims (7)

1. The device for measuring the included angle between the slow axis of the polarization maintaining jumper and the K key of the connector is characterized by comprising a first collimator, a polarizer, a second collimator, a third collimator, an optical power meter and a polarization analyzer which are sequentially arranged in the horizontal direction; the first collimator is installed on one collimator fixing mechanism, the second collimator is installed on the other collimator fixing mechanism, the third collimator is installed on the other collimator fixing mechanism, and the first collimator, the second collimator and the third collimator are coaxial.

2. The device for measuring the angle between the slow axis of the polarization maintaining jumper and the K key of the connector according to claim 1, wherein the collimator fixing mechanism provided with the first collimator is arranged on one five-dimensional adjusting frame, and the collimator fixing mechanism provided with the second collimator is arranged on the other five-dimensional adjusting frame.

3. The device for measuring the included angle between the slow axis of the polarization maintaining jumper and the K key of the connector according to claim 2, wherein the five-dimensional adjusting frames comprise 5 knobs, and the 5 knobs are a left-right adjusting knob, a front-back adjusting knob, a height adjusting knob, a pitching adjusting knob and a horizontal rotating knob.

4. The device for determining the angle between the slow axis of the polarization maintaining wire and the K key of the connector according to claim 1, wherein the collimator fixing mechanism is a polarizer adjusting frame.

5. The device for measuring the included angle between the slow axis of the polarization maintaining jumper and the K key of the connector according to claim 4, wherein the polarizer adjusting frame comprises a pitching adjusting mechanism and a rotating adjusting mechanism, the pitching adjusting mechanism comprises an L-shaped pitching bracket, an extension spring is arranged on the L-shaped pitching bracket, one end of the extension spring is fixed on the L-shaped pitching bracket, and the other end of the extension spring is connected with the rotating adjusting mechanism; the rotary adjusting mechanism comprises an L-shaped rotary support, a Z-direction rotary mechanism is arranged on the L-shaped rotary support, the Z-direction rotary mechanism is located at the middle position of the L-shaped rotary support and is rotationally connected with the rotary support, and a through hole is formed in the middle position of the L-shaped rotary support.

6. The device for measuring the included angle between the slow axis of the polarization maintaining wire and the K key of the connector according to claim 5, wherein the Z-direction rotating mechanism comprises a dial, the end face of the dial is provided with 0-360 degrees mark lines, and the L-shaped rotating bracket is marked with alignment scale lines.

7. The device for determining the angle between the slow axis of the polarization maintaining jumper and the K key of the connector according to claim 1, wherein the extinction ratio of the polarizer is 100000:1.

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