CN114486174A - Beam combiner testing device and method - Google Patents
Beam combiner testing device and method Download PDFInfo
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- CN114486174A CN114486174A CN202210024010.3A CN202210024010A CN114486174A CN 114486174 A CN114486174 A CN 114486174A CN 202210024010 A CN202210024010 A CN 202210024010A CN 114486174 A CN114486174 A CN 114486174A
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- 238000012360 testing method Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000000835 fiber Substances 0.000 claims abstract description 163
- 238000005086 pumping Methods 0.000 claims abstract description 18
- 239000013307 optical fiber Substances 0.000 claims abstract description 13
- 238000005253 cladding Methods 0.000 claims description 12
- 239000003292 glue Substances 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 6
- 239000011247 coating layer Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 238000002310 reflectometry Methods 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
- G01M11/33—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face
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Abstract
The invention relates to a beam combiner testing device, which comprises: the optical fiber testing device comprises a first light source, a second light source, a signal fiber, a pumping fiber and a power meter, wherein the signal fiber is provided with a mounting position sleeved with a to-be-tested combiner, the to-be-tested combiner forms the signal fiber into a signal fiber input fiber and a signal fiber output fiber, the signal fiber input fiber is connected with the output end of the first light source, the output end of the signal fiber output fiber is aligned with the receiving end of the power meter, one end of the pumping fiber is connected with the output end of the second light source, and the other end of the pumping fiber forms a connecting end connected with the to-be-tested combiner. The invention also provides a testing method of the beam combiner. The testing device and the method of the beam combiner are used for detecting whether the beam combiner has problems or not by arranging a first light source and a second light source which are respectively connected with a number fiber input fiber and a pumping fiber; the detection speed is high, and the result is accurate. Can help the staff to examine the beam combiner fast, reduce unnecessary device loss.
Description
Technical Field
The invention relates to the technical field of laser detection, in particular to a beam combiner testing device and method.
Background
The beam combiner is an optical fiber device prepared on the basis of a fused biconical taper optical fiber bundle. A bundle of optical fibers are arranged together in a certain mode, the optical fibers are heated at high temperature to be melted, meanwhile, the optical fiber bundle is stretched towards the opposite direction, and an optical fiber heating area is melted to form a fused-cone optical fiber bundle.
The main functions of the beam combiner are to realize pump light coupling, and the optical fiber beam combiner is indispensable in all-fiber high-power optical fiber lasers due to the advantages of high coupling efficiency, high integration level, convenience in operation and the like. In use, the beam combiner has the following problems: 1. the signal light is transmitted from the signal input fiber core of the beam combiner to the signal output fiber cladding; the problem can cause that the seed light from the MO enters the cladding from the fiber core after passing through the beam combiner, and further causes the signal light to be dissipated in the subsequent FA, so that the power of the laser is low, and even the laser is possibly burnt; 2. the pump light is transmitted into a signal output fiber core from a beam combiner pump fiber; such problems can cause that the pumping light enters the fiber core of the gain fiber in the FA after the beam combiner, and the absorption efficiency of the fiber core pumping is low, which can cause the output power of the whole machine to be low.
Therefore, there is a need for a detection apparatus and method for an optical combiner to determine whether the optical combiner has the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a testing device and a testing method of a beam combiner, aiming at the problem that the existing optical beam combiner is easy to generate output errors.
The technical scheme adopted by the invention is as follows: a beam combiner testing apparatus comprising:
the optical fiber testing device comprises a first light source, a second light source, a signal fiber, a pumping fiber and a power meter, wherein the signal fiber is provided with a mounting position sleeved with a to-be-tested combiner, the to-be-tested combiner enables the signal fiber to form a signal fiber input fiber and a signal fiber output fiber, the signal fiber input fiber is connected with the output end of the first light source, the output end of the signal fiber output fiber is aligned to the receiving end of the power meter, one end of the pumping fiber is connected with the output end of the second light source, and the other end of the pumping fiber forms a connecting end connected with the to-be-tested combiner.
Furthermore, a coating layer is detachably arranged on the surface of the signal fiber output fiber.
Furthermore, a glue coating area is arranged on the signal fiber output fiber.
Furthermore, a cutting mark is arranged at one end, aligned with the power meter, of the signal fiber output fiber, and the included angle between the plane where the cutting mark is located and the vertical plane is 8 degrees.
Further, the first light source is a 1064nm light source: the average output power of the light source is 20W, the working frequency is 30-80KHz, and the central wavelength is 1064 nm; the second light source is a 1064nm light source: the average output power of the light source is 20W, the working frequency is 30-80KHz, and the central wavelength is 1064 nm.
Further, the signal fiber type is LMA-GDF-10/130-M; the pump fiber model is MM-S105/125-22A.
The invention also provides a testing method of the beam combiner, which is applied to the testing device of the beam combiner and comprises the following steps:
s1, installing a combiner to be tested on the signal fibers to form signal fiber input fibers and signal fiber output fibers;
s2, operating the first light source and not operating the second light source, and recording the power P1 measured by the power meter;
s3, operating the second light source and not operating the first light source, and recording the power P2 measured by the power meter;
s4, processing the signal fiber output fiber to improve the reflectivity of the signal fiber output fiber;
s5, making the first light source work and the second light source not work, recording the power P3 measured by the power meter;
s6, operating the second light source and not operating the first light source, and recording the power P4 measured by the power meter;
and S7, determining whether the beam combiner is qualified according to P1, P2, P3 and P4.
Further, step S4 includes:
s41, removing a coating layer on the surface of the signal fiber output fiber;
s42, coating high-refractive-index glue on the surface of the signal fiber output fiber;
and S43, cutting the signal fiber output fiber along the cutting mark to align to one end of the power meter so as to form a cutting surface with an included angle of 8 degrees with the vertical plane.
Further, in step S42, the refractive index of the high refractive index glue is greater than the refractive index of the cladding of the beam combiner.
Further, specifically, step S7 includes:
s71, calculating N according to P1 and P31，N1＝P3/P1*100％，N1>90% of the signals can be considered that the beam combiner does not transmit the signal light into the signal output fiber cladding;
s72, calculating N according to P2 and P42，N2＝(P2-P4)/P2*100％，N2>90% of the signals can be considered that the beam combiner does not transmit the pump light into the core of the signal output fiber.
The beam combiner testing device and the method are used for detecting whether the beam combiner transmits signal light into a signal output fiber cladding or not and detecting whether the beam combiner transmits pump light into a signal output fiber core or not by arranging a first light source and a second light source which are respectively connected with a signal input fiber and a pump fiber; the detection speed is high, and the result is accurate. Can help the staff to examine the beam combiner fast, reduce unnecessary device loss.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic structural diagram of a beam combiner testing apparatus according to the present invention;
FIG. 2 is a schematic diagram of the signal fiber output fiber of FIG. 1;
fig. 3 is a schematic step diagram illustrating a testing method for a beam combiner according to an embodiment of the present invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention. The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is provided for the purpose of facilitating and clearly illustrating embodiments of the present invention.
It will be understood that when an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
Example 1
The invention provides a testing device of a beam combiner, which is described in the following with reference to the accompanying drawings;
referring to fig. 1, a beam combiner testing apparatus provided in the present invention includes: the optical fiber testing device comprises a first light source 1, a second light source 2, a signal fiber 3, a pumping fiber 4 and a power meter 5, wherein a mounting position sleeved with a to-be-tested combiner is arranged on the signal fiber 3, the to-be-tested combiner enables the signal fiber 3 to form a signal fiber input fiber 31 and a signal fiber output fiber 32, the signal fiber input fiber 31 is connected with the output end of the first light source 1, the output end of the signal fiber output fiber 32 is aligned to the receiving end of the power meter 5, one end of the pumping fiber 4 is connected with the output end of the second light source 2, and the other end of the pumping fiber 4 forms a connecting end connected with the to-be-tested combiner.
Specifically, a coating layer is detachably disposed on the surface of the signal fiber output fiber 32.
Specifically, the signal fiber output fiber 32 is provided with a glue coating area.
Specifically, referring to fig. 2, a cutting mark 321 is disposed on one end of the signal fiber output fiber 32 aligned with the power meter 5, and an included angle between a plane where the cutting mark 321 is located and a vertical plane is 8 °.
Specifically, the first light source 1 is a 1064nm light source: the average output power of the light source is 20W, the working frequency is 30-80KHz, and the central wavelength is 1064 nm.
Specifically, the second light source 2 is a 1064nm light source: the average output power of the light source is 20W, the working frequency is 30-80KHz, and the central wavelength is 1064 nm.
Specifically, the type of the signal fiber 3 is LMA-GDF-10/130-M.
Specifically, the model of the pumping fiber 4 is MM-S105/125-22A.
The beam combiner testing device provided by the embodiment of the invention is provided with the first light source 1 and the second light source 2 which are respectively connected with the signal fiber input fiber and the pumping fiber 4, can detect whether the beam combiner transmits signal light into a signal output fiber cladding or not, and can detect whether the beam combiner transmits the pumping light into a signal output fiber core or not; the detection speed is high, and the result is accurate. Can help the staff to examine the beam combiner fast, reduce unnecessary loss.
Referring to fig. 3, the present invention further provides a testing method of a beam combiner, applied to the testing apparatus of the beam combiner, including the following steps:
s1, installing a combiner to be tested on the signal fibers 3 to form signal fiber input fibers 31 and signal fiber output fibers 32;
s2, operating the first light source 1 and the second light source 2, and recording the power P1 measured by the power meter 5;
s3, operating the second light source 2 and the first light source 1, and recording the power P2 measured by the power meter 5;
s4, processing the signal fiber output fiber 32 to improve the reflectivity of the signal fiber output fiber 32;
s5, operating the first light source 1 and the second light source 2, and recording the power P3 measured by the power meter 5;
s6, operating the second light source 2 and the first light source 1, and recording the power P4 measured by the power meter 5;
and S7, determining whether the beam combiner is qualified according to P1, P2, P3 and P4.
Compared with the prior art, the beam combiner test method provided by the embodiment of the invention utilizes the first light source and the second light source which are respectively connected with the signal fiber input fiber and the pump fiber to detect whether the beam combiner transmits the signal light into the signal output fiber cladding or not and can detect whether the beam combiner transmits the pump light into the signal output fiber core or not; the detection speed is high, and the result is accurate.
Specifically, step S4 includes:
s41, removing a coating layer on the surface of the signal fiber output fiber;
s42, coating high-refractive-index glue on the surface of the signal fiber output fiber;
and S43, cutting the signal fiber output fiber along the cutting mark 321 to align with one end of the power meter so as to form a cutting surface with an included angle of 8 degrees with the vertical plane.
Specifically, in step S42, the refractive index of the high-refractive-index glue is greater than the refractive index of the cladding of the beam combiner.
Specifically, step S7 includes:
s71, calculating N according to P1 and P31，N1＝P3/P1*100％，N1>90% of the signals can be considered that the beam combiner does not transmit the signal light into the signal output fiber cladding;
s72, calculating N according to P2 and P42，N2＝(P2-P4)/P2*100％，N2>90% of the signals can be considered that the beam combiner does not transmit the pump light into the core of the signal output fiber.
The beam combiner testing device and the method are used for detecting whether the beam combiner transmits signal light into a signal output fiber cladding or not and detecting whether the beam combiner transmits pump light into a signal output fiber core or not by arranging a first light source 1 and a second light source 2 which are respectively connected with a signal input fiber and a pump fiber 4; the detection speed is high, and the result is accurate. Can help the staff to examine the beam combiner fast, reduce unnecessary device loss.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner; those skilled in the art can readily practice the invention as shown and described in the drawings and detailed description herein; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the scope of the invention as defined by the appended claims; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (10)
1. A beam combiner testing apparatus, comprising:
the optical fiber testing device comprises a first light source, a second light source, a signal fiber, a pumping fiber and a power meter, wherein the signal fiber is provided with a mounting position sleeved with a to-be-tested combiner, the to-be-tested combiner enables the signal fiber to form a signal fiber input fiber and a signal fiber output fiber, the signal fiber input fiber is connected with the output end of the first light source, the output end of the signal fiber output fiber is aligned to the receiving end of the power meter, one end of the pumping fiber is connected with the output end of the second light source, and the other end of the pumping fiber forms a connecting end connected with the to-be-tested combiner.
2. The beam combiner test apparatus of claim 1,
the surface of the signal fiber output fiber is detachably provided with a coating layer.
3. The beam combiner test apparatus of claim 1,
and the signal fiber output fiber is provided with a glue coating area.
4. The beam combiner test apparatus of claim 1,
and a cutting mark is arranged at one end of the signal fiber output fiber, which is aligned with the power meter, and the included angle between the plane of the cutting mark and the vertical plane is 8 degrees.
5. The beam combiner test apparatus of claim 1,
the first light source is a 1064nm light source: the average output power of the light source is 20W, the working frequency is 30-80KHz, and the central wavelength is 1064 nm; the second light source is a 1064nm light source: the average output power of the light source is 20W, the working frequency is 30-80KHz, and the central wavelength is 1064 nm.
6. The beam combiner test apparatus of claim 4,
the signal fiber type is LMA-GDF-10/130-M; the pump fiber model is MM-S105/125-22A.
7. A combiner test method applied to the combiner test device according to any one of claims 1 to 6, comprising the steps of:
s1, installing a combiner to be tested on the signal fibers to form signal fiber input fibers and signal fiber output fibers;
s2, making the first light source work and the second light source not work, recording the power P1 measured by the power meter;
s3, operating the second light source and not operating the first light source, and recording the power P2 measured by the power meter;
s4, processing the signal fiber output fiber to improve the reflectivity of the signal fiber output fiber;
s5, operating the first light source and not operating the second light source, and recording the power P3 measured by the power meter;
s6, operating the second light source and not operating the first light source, and recording the power P4 measured by the power meter;
and S7, determining whether the beam combiner is qualified according to P1, P2, P3 and P4.
8. The method for testing the beam combiner of claim 7, wherein the step S4 comprises:
s41, removing a coating layer on the surface of the signal fiber output fiber;
s42, coating high-refractive-index glue on the surface of the signal fiber output fiber;
and S43, cutting the signal fiber output fiber along the cutting mark to align to one end of the power meter so as to form a cutting surface with an included angle of 8 degrees with the vertical plane.
9. The beam combiner testing method of claim 8,
in step S42, the refractive index of the high refractive index glue is greater than the refractive index of the cladding of the beam combiner.
10. The method for testing the beam combiner of claim 9, wherein the step S3 comprises:
specifically, step S7 includes:
s71, calculating N according to P1 and P31，N1＝P3/P1*100％，N1>90% of the signals can be considered that the beam combiner does not transmit the signal light into the signal output fiber cladding;
s72, calculating N according to P2 and P42，N2＝(P2-P4)/P2*100％，N2>90% of the signals can be considered that the beam combiner does not transmit the pump light into the core of the signal output fiber.
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