Isolator testing tool and isolator performance testing system

Abstract

The utility model relates to the technical field of laser testing equipment, and in particular to an isolator testing tool and an isolator performance testing system, wherein the isolator testing tool comprises: a base, a first clamping member, which is arranged on the upper part of the base and is used to clamp a laser generator; a second clamping member, which is arranged on the base and is located below the first clamping member, and the second clamping member is used to clamp a ferrule. The isolator testing tool provided in the present application clamps the laser generator by the first clamping member, clamps the ferrule by the second clamping member, and accommodates the isolator by a detachable third clamping member, and can test the optical power in the laser coupling equipped with the isolator, and the optical power of the laser coupling without the isolator, and the difference between the two optical powers obtained is obtained to obtain the optical power loss and insertion loss of the isolator, so as to facilitate the performance test of the isolator and improve the isolator test efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of laser testing equipment, and in particular to an isolator testing tool and an isolator performance testing system. Background Art

[0002] The function of an optical isolator is to allow forward-transmitted light to pass through while isolating reverse-transmitted light, thereby preventing reflected light from affecting the stability of the system. Its main function is to prevent the adverse effects of backward-transmitted light generated in the optical path due to various reasons on the light source and the optical path system. Optical isolators are divided into polarization-dependent and polarization-independent types according to polarization relevance. The polarization-dependent type has no optical fiber input and output at both ends, and is also called the free-space type. Free-space optical isolators are generally used in semiconductor lasers because the light emitted by semiconductor lasers has extremely high linearity, so this polarization-dependent optical isolator can be used to enjoy the advantage of low cost.

[0003] In the prior art, it is necessary to select an optical isolator with performance parameters that meet the requirements to ensure the stability of the optical module in optical fiber communication. However, there is no suitable test tooling during the performance test of the optical isolator, which makes the performance test of the optical isolator inconvenient. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide an isolator testing tool and an isolator performance testing system.

[0005] In a first aspect, an embodiment of the utility model provides an isolator testing tool, the isolator testing tool comprising:

[0006] Pedestal;

[0007] A first clamping member, disposed on the upper portion of the base, for clamping the laser generator;

[0008] A second clamping member is provided on the base and is located below the first clamping member, and the second clamping member is used to clamp the ferrule;

[0009] The third clamping member is detachably arranged above the second clamping member. The top of the second clamping member is provided with a receiving cavity for receiving the isolator. The bottom of the receiving cavity is connected with the optical receiving end of the ferrule.

[0010] In combination with the first aspect, the insert core has a protruding portion, and the third clamping piece is sleeved on the protruding portion.

[0011] In combination with the first aspect, the accommodating chamber is adapted to the shape of the isolator.

[0012] In combination with the first aspect, the isolator test tool also includes:

[0013] A plane adjustment component connected to the bottom of the second clamping member and used for adjusting the horizontal position of the insert in the second clamping member;

[0014] The height adjustment component is fixedly connected to the first clamping member and is used to adjust the height position of the laser generator in the first clamping member.

[0015] In combination with the first aspect, the plane adjustment component includes:

[0016] A first direction adjusting member, used for adjusting the position of the insert along a first direction;

[0017] A second direction adjusting member, fixed to the first direction adjusting member, for adjusting the position of the insert along a second direction;

[0018] The first direction is perpendicular to the second direction and is in the same plane.

[0019] In combination with the first aspect, a through hole is opened on one side wall of the first clamping member, and an internal thread is arranged on the inner wall of the through hole; the adjusting member passes through the through hole and abuts against the laser generator, and an external thread is arranged on the outer wall of the adjusting member, and the adjusting member can rotate relative to the through hole.

[0020] In combination with the first aspect, one end of the adjusting member and the laser generator is a plane.

[0021] In a second aspect, the present application provides an isolator performance testing system, which includes the isolator testing tooling as described above.

[0022] In combination with the second aspect, the isolator performance testing system also includes a laser power detection mechanism.

[0023] In combination with the second aspect, the isolator performance testing system further includes a control mechanism, which is connected to the laser power detection mechanism.

[0024] The embodiments of the utility model bring the following beneficial effects: the application provides an isolator testing tool, which includes: a base, a first clamping member, which is arranged on the upper part of the base and is used to clamp the laser generator; a second clamping member, which is arranged on the base and is located below the first clamping member, and the second clamping member is used to clamp the ferrule; a third clamping member, which is detachably arranged above the second clamping member, and a accommodating cavity is opened on the top of the second clamping member, and the accommodating cavity is used to accommodate the isolator, and the bottom of the accommodating cavity is connected to the light receiving end of the ferrule.

[0025] The isolator testing tool provided in the present application clamps the laser generator by a first clamping member, clamps the ferrule by a second clamping member, and accommodates the isolator by a detachable third clamping member. The optical power in the laser coupling equipped with the isolator and the optical power of the laser coupling without the isolator can be tested separately, and the difference between the two obtained optical powers can be obtained to obtain the optical power loss and insertion loss of the isolator, so as to facilitate the performance test of the isolator and improve the isolator testing efficiency.

[0026] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures specifically pointed out in the description, claims and drawings.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A schematic diagram of the isolator test fixture structure provided in an embodiment of the present application;

[0030] Figure 2 It is a schematic structural diagram of the third clamping member.

[0031] The reference numerals are as follows:

[0032] 1-base, 2-first clamping member, 3-second clamping member, 4-third clamping member, 41-accommodating chamber, 5-plane adjustment component, 51-first direction adjustment member, 52-second direction adjustment member, 6-height adjustment component, 7-adjustment member. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0034] To facilitate understanding of this embodiment, the following is a brief introduction to the technologies involved in this application.

[0035] Laser isolator, also known as optical isolator, is a passive optical device, which is made by the non-reciprocity principle of Faraday rotation. It only allows light to pass from one direction, prevents light from passing in the opposite direction, and isolates the reflected light, thereby realizing unidirectional light transmission and achieving optical isolation effect. This device is widely used in lasers, especially in fiber lasers, to prevent echoes in the optical path from interfering with and damaging light sources, pump sources and other light-emitting devices. In high-speed direct modulation and direct detection fiber communication systems, the backward transmission light will generate additional noise, which degrades the performance of the system, which also requires optical isolators to eliminate. Installing optical isolators at both ends of the doped optical fiber in the fiber amplifier can improve the working stability of the fiber amplifier. Without it, the backward reflected light will enter the signal source (laser), causing violent fluctuations in the signal source. In the coherent light long-distance fiber communication system, installing an optical isolator at a certain distance can reduce the power loss caused by stimulated Brillouin scattering.

[0036] Furthermore, optical isolators are used in many applications, including laser applications, where they are primarily used to prevent unwanted feedback from entering the laser source. This feature helps not to affect the coherence of the laser while affecting any potential damage to the diode, as feedback can generate frequency noise, offsets, amplitude fluctuations, or mode hopping. Therefore, it is one of the key components to obtain stable semiconductor laser tube operation.

[0037] After introducing the technical terms involved in this application, the application scenarios and design concepts of the embodiments of this application are briefly introduced.

[0038] In fiber-optic communications, optical power has become an important factor limiting the development of optical modules, especially in high-speed communication networks. How to improve the stability of the optical power of the laser in the optical module and ensure that the light emitted by each laser is free of reflection and crosstalk has become an important factor in stabilizing the optical module.

[0039] After the existing isolators are received, they are directly coupled to the product. Since the optical power insertion loss of each isolator to the laser is inconsistent, it will lead to waste of materials and increase of labor costs, and it is not conducive to the analysis and processing of the problem.

[0040] Based on this, an embodiment of the present application provides an isolator testing tool and an isolator performance testing system.

[0041] Example 1

[0042] The present application provides an isolator testing tool, combined with Figure 1 As shown, the isolator testing tool comprises: a base 1 , a first clamping member 2 , a second clamping member 3 , and a third clamping member 4 .

[0043] The first clamping member 2 is disposed on the upper portion of the base 1 and is used to clamp the laser generator.

[0044] The second clamping member 3 is disposed on the base 1 and is located below the first clamping member 2 , and the second clamping member 3 is used for clamping the ferrule.

[0045] The third clamping member 4 is detachably disposed above the second clamping member 3 . A receiving cavity 41 is provided on the top of the third clamping member 4 . The receiving cavity 41 is used to receive the isolator. The bottom of the receiving cavity 41 is connected to the optical receiving end of the ferrule.

[0046] The isolator testing tool provided in the present application comprises a detachable third clamping member 4, wherein the third clamping member 4 has a receiving cavity 41 for receiving the isolator, Figure 2 As shown, by testing the maximum optical power of the laser coupling when the isolator is installed and the maximum optical power of the laser coupling when the isolator is not installed, the insertion loss of the isolator to the laser optical power can be calculated to facilitate the performance detection of the isolator and improve the detection efficiency.

[0047] Combination Figure 1 As shown, the first clamping member 2 is arranged above the second clamping member 3, and the first clamping member 2 clamps the laser transmitter, with the emitting end of the laser transmitter facing the second clamping member 3, and the ferrule is clamped in the second clamping member 3, with the optical receiving end of the ferrule facing the first clamping member 2, so that the laser transmitter emits light, which is received by the ferrule for laser coupling. In this process, if the third clamping member 4 contains an isolator, then the light is injected into the isolator and then received by the ferrule. At this time, due to the optical isolation performance of the isolator, a certain optical power loss will be caused. Therefore, by calculating the difference between the two maximum optical powers, the insertion loss of the isolator to the laser optical power can be obtained, and the performance detection of the isolator can be realized, and the detection efficiency can be improved.

[0048] In combination with the first aspect, the second clamping member 3 is used to clamp the ferrule, and the third clamping member 4 is installed above the ferrule and communicated with the light receiving end of the ferrule. In this embodiment, the ferrule has a protrusion, and the third clamping member 4 is sleeved on the protrusion. Compared with the method of placing the third clamping member 4 on the second clamping member 3, the structural stability can be improved.

[0049] In this embodiment, the third clamping member 4 is a metal block, a receiving cavity is formed on the top of the metal block, and a through channel is formed inside the metal block, with two ends of the channel respectively connecting the receiving cavity and the optical receiving end of the ferrule.

[0050] In combination with the first aspect, the accommodating cavity 41 is adapted to the shape and size of the isolator.

[0051] The lower isolator is usually round or square in shape, has a wavelength range of 850nm-1600nm, and has a light aperture diameter of at least 0.2nm. The accommodating cavity 41 is adapted to the shape of the isolator, so that it can be better fitted with the isolator to improve structural stability.

[0052] It can be understood that the cross-sectional dimensions of the accommodating cavity 41 on the third clamping member 4 (metal block) in any direction should be greater than or equal to the cross-sectional dimensions of the isolator so that the isolator can be accommodated in the accommodating cavity 41. However, when the cross-sectional dimensions of the two are far apart, the isolator cannot be well accommodated and fixed, and it is easy to move during the laser coupling process. Therefore, the cross-sectional dimensions of the two should not be too far apart. In addition, the cross-sectional shape of the accommodating cavity 41 can be the same as or different from the cross-sectional shape of the isolator. For example, the horizontal cross-sectional shape of the accommodating cavity 41 is circular and the horizontal cross-sectional shape of the isolator is square. Then, during the clamping process of the isolator, the clamping points are at the four diagonal corners of the square, and the clamping stability is not ideal. In this embodiment, the shape and size of the accommodating cavity 41 are adapted to the isolator, so that each point on the outer edge of the isolator is evenly stressed, the fit is good, and the structural stability is better.

[0053] In combination with the first aspect, the isolator testing tool further includes: a plane adjustment component 5 and a height adjustment component 6.

[0054] The plane adjustment component 5 is connected to the bottom of the second clamping member 3 and is used to adjust the horizontal position of the ferrule in the second clamping member 3 .

[0055] The height adjustment component 6 is fixedly connected to the first clamping member 2 and is used to adjust the height position of the laser generator in the first clamping member 2 .

[0056] In this way, during the laser coupling process, the positions of the laser generator and the ferrule are adjusted by the plane adjustment component 5 and the height adjustment component 6, so that the optical power value at each position is recorded through continuous debugging to obtain the maximum optical power.

[0057] In combination with the first aspect, the plane adjustment assembly 5 includes: a first direction adjustment member 51 and a second direction adjustment member 52 .

[0058] The first direction adjusting member 51 is used to adjust the position of the insert along a first direction.

[0059] The second direction adjusting member 52 is fixed on the first direction adjusting member 51 and is used for adjusting the position of the insert along the second direction.

[0060] The first direction is perpendicular to the second direction and is in the same plane.

[0061] In this embodiment, the planar position of the insert can be adjusted by the first direction adjusting member 51 and the second direction adjusting member 52. For example, in the geodetic coordinate system, the X-axis in the plane is the first direction, the Y-axis is the second direction, and the Z-axis is the height direction adjusted by the height adjustment component 6.

[0062] In this embodiment, after the laser generator, the ferrule and the isolator are assembled, the horizontal position of the ferrule is first adjusted by the first direction adjusting member 51 and / or the second direction adjusting member 52 to find the light emitting position, that is, to find the position where the light receiving end of the ferrule receives the light; then, the height of the laser generator is adjusted by the height adjusting component 6 so that the laser can be emitted into the ferrule from the above-mentioned position where the light can be received; then, the horizontal position of the ferrule is adjusted again by the first direction adjusting member 51 and / or the second direction adjusting member 52 and the optical power values ​​of each position during the adjustment process are obtained to determine the maximum first optical power value when the isolator is installed.

[0063] Afterwards, the third clamping member 4 containing the isolator is disassembled, and the above laser coupling steps are repeated again to obtain the second maximum optical power without installing the isolator.

[0064] The difference between the two is then calculated to determine the optical power loss of the isolator.

[0065] The structures of the first direction adjusting member 51, the second direction adjusting member 52 and the height adjusting assembly 6 can be in various forms, such as by sliding fit between the slide rail and the slider, gear rack meshing drive, etc. Figure 1 As shown, in this embodiment, the position adjustment is achieved by using a screw rod to push the sliding platform to slide along a set direction. This structure is a commonly used structure and is only used as an example here without limitation.

[0066] In combination with the first aspect, a through hole is opened on one side wall of the first clamping member 2, and an internal thread is arranged on the inner wall of the through hole; the adjusting member 7 passes through the through hole and abuts against the laser generator, and an external thread is arranged on the outer wall of the adjusting member 7, and the adjusting member 7 can rotate relative to the through hole.

[0067] It can be understood that the adjusting member 7 is in contact with the laser generator, and the clamping degree of the laser generator can be adjusted by rotating the adjusting member 7 to achieve stable clamping. In this process, the external thread on the adjusting member 7 is threadedly connected with the internal thread on the inner wall of the through hole, which can prevent the adjusting member 7 from shaking and improve the structural stability.

[0068] In combination with the first aspect, the end of the adjusting member 7 that contacts the laser generator is a plane.

[0069] It is understandable that the laser generator is usually cylindrical with an arc outer edge. If the end of the adjusting member 7 in contact with the laser generator is a conical point contact, the structural stability is poor. In the present application, the plane end face is in contact with the arc outer edge to achieve line contact, which is conducive to stable clamping.

[0070] In a second aspect, the present application provides an isolator performance testing system, which includes the above-mentioned isolator testing tooling.

[0071] The isolator, the laser generator, and the ferrule are assembled on the isolator test fixture, and laser coupling is performed to measure the maximum value of the first optical power when the isolator is installed; then, the third clamping member 4 containing the isolator is disassembled, and laser coupling is performed again to measure the maximum value of the second optical power when the isolator is installed; finally, the difference between the first optical power maximum value and the second optical power maximum value is calculated to obtain the optical power loss and insertion loss of the isolator, so as to complete the performance test of the isolator.

[0072] In combination with the second aspect, the isolator performance testing system further includes a laser power detection mechanism.

[0073] The laser power detection mechanism is used to detect the optical power value at each position in the laser coupling.

[0074] In combination with the second aspect, the isolator performance testing system further includes a control mechanism, and the control mechanism is connected to the laser power detection mechanism.

[0075] In this way, the laser power detection mechanism sends the optical power value at each position in the laser coupling to the control mechanism, and the control mechanism receives multiple optical power values ​​and performs data processing to determine the first maximum optical power value and the second maximum optical power value.

[0076] It can be understood that the control mechanism can also be connected to the display mechanism to display the received optical power value, the determined maximum first optical power value, the second optical power value and the calculated maximum optical power difference value, and can also display the comparison result of the maximum optical power difference value with the set threshold value, so that the staff can judge whether the performance of the isolator meets the requirements.

[0077] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system and device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0078] In addition, in the description of the embodiments of the present application, 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 an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0079] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0080] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0081] Finally, it should be noted that the above embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above embodiments, those skilled in the art should understand that any person skilled in the art who is familiar with the technical field can still modify the technical solutions recorded in the above embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An isolator test tool, characterized in that: The isolator test tooling includes: Base, A first clamping member, disposed on the upper portion of the base, for clamping the laser generator; A second clamping member, provided on the base and located below the first clamping member, the second clamping member being used for clamping the ferrule; The third clamping member is detachably arranged above the second clamping member. The top of the second clamping member is provided with a receiving cavity for receiving the isolator. The bottom of the receiving cavity is connected to the optical receiving end of the ferrule.

2. The isolator testing tool according to claim 1, characterized in that: The insert core has a protruding portion, and the third clamping piece is sleeved on the protruding portion.

3. The isolator testing tool according to claim 1, characterized in that: The accommodating cavity is adapted to the shape of the isolator.

4. The isolator testing tool according to claim 1, characterized in that: The isolator test tool also includes: A plane adjustment component connected to the bottom of the second clamping member and used for adjusting the horizontal position of the ferrule in the second clamping member; A height adjustment component is fixedly connected to the first clamping member and is used to adjust the height position of the laser generator in the first clamping member.

5. The isolator testing tool according to claim 1, characterized in that: The plane adjustment assembly includes: A first direction adjusting member, used for adjusting the position of the insert along a first direction; A second direction adjusting member, fixed to the first direction adjusting member, and used for adjusting the position of the insert along a second direction; The first direction is perpendicular to the second direction and is in the same plane.

6. The isolator testing tool according to claim 1, characterized in that: A through hole is provided on one side wall of the first clamping member, and an inner thread is provided on the inner wall of the through hole; the adjusting member passes through the through hole and abuts against the laser generator, and an outer thread is provided on the outer wall of the adjusting member, and the adjusting member can rotate relative to the through hole.

7. The isolator testing tool according to claim 6, characterized in that: One end of the adjusting member in contact with the laser generator is a plane.

8. An isolator performance test system, characterized in that: The isolator performance testing system comprises the isolator testing tool as described in any one of claims 1-7.

9. The isolator performance test system according to claim 8, characterized in that: The isolator performance testing system also includes a laser power detection mechanism.

10. The isolator performance test system according to claim 9, characterized in that: The isolator performance testing system further comprises a control mechanism, and the control mechanism is connected to the laser power detection mechanism.

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