CN219104324U - Device for measuring optical index of optical device - Google Patents
Device for measuring optical index of optical device Download PDFInfo
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- CN219104324U CN219104324U CN202320248845.7U CN202320248845U CN219104324U CN 219104324 U CN219104324 U CN 219104324U CN 202320248845 U CN202320248845 U CN 202320248845U CN 219104324 U CN219104324 U CN 219104324U
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Abstract
The utility model discloses a device for measuring optical indexes of an optical device, which comprises a transformer arranged in a chassis, wherein the transformer is respectively and electrically connected with a cooling fan and a light source plate; the light source plate is electrically connected with the digital display ammeter and the light source in sequence; the light source is connected with the first polarization maintaining coupler, and the first polarization maintaining coupler is respectively connected with the second polarization maintaining coupler and the single-mode coupler; the second polarization maintaining coupler is sequentially connected with the first adapter and the first FC flange, and the single-mode coupler is sequentially connected with the fourth adapter and the fourth FC flange; one end of the other output end of the single-mode coupler is connected with the input end of the Y waveguide, the Y waveguide is sequentially connected with the second adapter and the second FC flange, and the other output end of the Y waveguide is sequentially connected with the third adapter and the third FC flange. The utility model can avoid repeated welding of the tail fiber of the optical device in the testing process, simultaneously reduces the insertion loss caused by overlarge welding angle in the welding process, improves the testing efficiency and improves the measuring precision.
Description
Technical Field
The utility model belongs to the technical field of optical detection, and particularly relates to a device for measuring optical indexes of an optical device.
Background
In the optical device insertion inspection, the optical device needs to be connected into the optical path of the semi-finished optical fiber gyroscope to form a complete optical path, and the preliminary screening of the performance parameters of the optical device is realized through the measurement of extinction ratio and insertion loss.
In the operation process, the testing end of the optical device is required to be welded with the corresponding position in the optical path of the semi-finished product, and the other end of the optical device is connected with an extinction ratio tester, so that the extinction ratio parameter of the optical fiber ring is measured. By measuring the original port optical power and the optical power after the optical device is accessed, and then passing alpha= -10lg (P out /P in ) The optical path loss of the optical device is calculated, the welding angle is required to be controlled in the measuring process, if the welding angle is too large, the measuring precision of the insertion loss of the optical fiber ring is also affected, because the optical fiber gyroscope is used for testing, the optical fiber is in direct contact with the external environment, the external environment has a certain influence on the optical fiber gyroscope used for testing, the whole optical connection structure is complex, and the measured value is error.
Disclosure of Invention
The utility model aims to provide a device for measuring optical indexes of an optical device to solve the problems that the optical path of a semi-finished product of an optical fiber gyroscope is easily influenced by external environment and further influences the testing accuracy when the optical device is inspected.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an apparatus for measuring optical index of an optical device, comprising a housing; the chassis is provided with a switch, the switch is arranged at the input end of the transformer, and the output end of the transformer is respectively and electrically connected with the cooling fan and the light source plate; the light source plate is electrically connected with the digital display ammeter and the light source in sequence; the tail fiber of the light source is connected with the input end of the first polarization maintaining coupler, and the two output ends of the first polarization maintaining coupler are respectively connected with the input end of the second polarization maintaining coupler and the input end of the single-mode coupler;
the output end of the second polarization maintaining coupler is sequentially connected with the first adapter and the first FC flange, and the first FC flange is a testing end of the polarization maintaining optical fiber;
one end of an output end tail fiber of the single-mode coupler is sequentially connected with a fourth adapter and a fourth FC flange, and the fourth FC flange is a test end of a single-mode fiber;
one end of a tail fiber of the other output end of the single-mode coupler is connected with the input end of the Y waveguide, one output end of the Y waveguide is sequentially connected with the second adapter and the second FC flange, and the other output end of the Y waveguide is sequentially connected with the third adapter and the third FC flange; the second FC flange and the third FC flange are fiber loop test ends.
Further, the transformer is fixed in the chassis through screws; the switch, the digital display ammeter, the first FC flange, the second FC flange, the third FC flange and the fourth FC flange are all arranged on the front panel of the case.
Further, the second FC flange and the third FC flange are located below the front panel, and the first FC flange and the fourth FC flange are located above the front panel.
Further, the heat radiation fan 4 is mounted on the chassis housing and distributed near the transformer position.
Further, the single-mode coupler, the first polarization maintaining coupler, the Y waveguide, the second polarization maintaining coupler, the light source plate and the light source are all assembled on the fiber-optic gyroscope base, and the fiber-optic gyroscope base is fixed inside the case through screws.
Further, the fiber optic gyroscope base and the transformer are respectively arranged at two sides of the chassis.
Further, rubber stilts with adjustable height are arranged at the bottom of the case.
The device for measuring the optical index of the optical device has the following beneficial effects:
the utility model converts 220V alternating current into +/-5V direct current power supply for a device through the transformer so as to provide stable working voltage for the cooling fan, the digital display ammeter and the light source board, wherein the digital display ammeter is used for displaying the driving current value of the light source board, the cooling fan provides the cooling function of the whole chassis, and the light source board ensures the output of a light source.
The device uses the FC flange interface as the input end interface of the optical device, can reduce the repeated welding of the tail fiber of the optical device in the test and reduce the measurement error caused by overlarge welding angle, and can obtain the extinction ratio and the insertion loss value of the optical device by butting the optical device to the FC flange interface at the corresponding position of the device and then connecting with an optical power tester or an extinction ratio tester.
Drawings
FIG. 1 is a schematic block diagram of the apparatus of the present utility model.
Fig. 2 is a front view and a partial cross-sectional view of the device of the present utility model.
Fig. 3 is a top view of the device of the present utility model.
Fig. 4 is a first working principle diagram of the present utility model.
Fig. 5 is a second working principle diagram of the present utility model.
Fig. 6 is a third working principle diagram of the present utility model.
Wherein, 1, a case; 2. a switch; 3. a transformer; 4. a heat radiation fan; 5. a light source board; 6. a digital display ammeter; 7. a light source; 8. a first polarization maintaining coupler; 9. a single-mode coupler; 10. a Y waveguide; 11. an adapter; 111. a first adapter; 112. a second adapter; 113. a third adapter; 114. a fourth adapter; 12. an FC flange interface; 121. a first FC flange; 122. a second FC flange; 123. a third FC flange; 124. a fourth FC flange; 13. and a second polarization maintaining coupler.
Detailed Description
The following description of the embodiments of the present utility model is provided to facilitate understanding of the present utility model by those skilled in the art, but it should be understood that the present utility model is not limited to the scope of the embodiments, and all the utility models which make use of the inventive concept are protected by the spirit and scope of the present utility model as defined and defined in the appended claims to those skilled in the art.
Example 1
Referring to fig. 1 to 3, the device for measuring optical indexes of an optical device according to the present embodiment can avoid multiple fusion of tail fibers of the optical device in a testing process, and simultaneously reduce insertion loss caused by overlarge fusion angle in the fusion process, and improve testing efficiency and measurement accuracy, and specifically includes:
the machine box 1 is provided with a switch 2, and the opening and closing operation of the whole device is controlled through the switch 2; the switch 2 is arranged at the input end of the transformer 3, the output end of the transformer 3 is respectively and electrically connected with the cooling fan 4 and the light source plate 5, the transformer 3 converts 220V alternating current into +/-5V direct current power supply, and working voltages are provided for the cooling fan 4, the light source plate 5 and the digital display ammeter 6.
The light source board 5 is connected with the digital display ammeter 6 and the light source 7 in turn, the tail fiber of the light source 7 is connected with the input end of the first polarization maintaining coupler 8, and the two output ends of the first polarization maintaining coupler 8 are respectively connected with the input end of the second polarization maintaining coupler 13 and the input end of the single-mode coupler 9.
In the embodiment, the light source plate 5 is adopted to replace a traditional temperature control plate and a traditional driving plate, redundant wiring is reduced, and the internal circuit board structure is simpler and the wiring is more reasonable.
The digital display ammeter 6 in this embodiment is preferably an isolated digital display ammeter 6, so that the wiring inside the chassis 1 can be simplified, the transformer 3 is prevented from affecting the output of the light source 7, and the output state of the light source 7 can be monitored more conveniently in a meter reading mode.
The output end of the second polarization maintaining coupler 13 is sequentially connected with the first adapter 111 and the first FC flange 121, and the first FC flange 121 is a testing end of the polarization maintaining fiber and is connected with the polarization maintaining fiber during specific testing.
One output end tail fiber end of the single-mode coupler 9 is sequentially connected with the fourth adapter 114 and the fourth FC flange 124, and the fourth FC flange 124 is a testing end of a single-mode fiber and is connected with the single-mode fiber during specific testing.
One end of the tail fiber of the other output end of the single-mode coupler 9 is connected with the input end of the Y waveguide 10, one output end of the Y waveguide 10 is sequentially connected with the second adapter 112 and the second FC flange 122, and the other output end of the Y waveguide 10 is sequentially connected with the third adapter 113 and the third FC flange 123; the second FC flange 122 and the third FC flange 123 are fiber optic ring test ends, and can be connected to a fiber optic ring during a specific test.
The FC flange interface 12 of the present embodiment specifically includes four interfaces, namely, a first FC flange 121, a second FC flange 122, a third FC flange 123, and a fourth FC flange 124;
the adapter 11 comprises a first adapter 11, a second adapter 112, a third adapter 113 and a fourth adapter 114.
The FC flange interface 12 is adopted to be connected with the optical fiber to be tested, compared with a traditional connection mode, the device reduces the optical fiber welding process in a butt joint mode, improves the testing efficiency, and simultaneously effectively reduces the loss caused by a large optical fiber welding angle.
Specifically, the transformer 3 of the embodiment is fixed inside the chassis 1 by screws; the switch 2, the digital display ammeter 6, the first FC flange 121, the second FC flange 122, the third FC flange 123 and the fourth FC flange 124 are all mounted on the front panel of the chassis 1.
The second and third FC flanges 122 and 123 are located below the front panel, and the first and fourth FC flanges 121 and 124 are located above the front panel.
The cooling fan 4 is arranged on the shell of the case 1 and is distributed near the position of the transformer 3, so as to reduce the temperature change caused by the operation of the device and improve the measurement accuracy; and the influence of the high temperature of the transformer 3 on the measurement result can be prevented from being caused by long-time operation.
In order to simplify the structural layout in the device, a single-mode coupler 9, a first polarization maintaining coupler 8, a Y waveguide 10, a second polarization maintaining coupler 13, a light source plate 5 and a light source 7 are all assembled on a fiber optic gyroscope base, and the fiber optic gyroscope base is fixed in the chassis 1 through screws; by the arrangement, the internal layout of the case 1 can be more concise, the optical fiber gyroscope base can provide an optical fiber coiling area, can assist the heat dissipation of the light source 7 and has a certain electromagnetic shielding effect.
The fiber optic gyroscope base and the transformer 3 are respectively arranged on two sides of the chassis 1, so that the influence of temperature change and electromagnetic interference on a test result can be effectively avoided.
The rubber stilt of adjustable height is installed to the bottom of quick-witted case 1, can satisfy different height operators' operation demand, and rubber material has certain cushioning effect to vibrations, can effectively reduce the difference of test parameter because of the vibration of a small margin brings.
The working principle of the embodiment when the embodiment is used for optical index of the optical device is as follows:
before optical index test of the optical device is carried out, optical fibers at two ends of the optical device to be tested are respectively penetrated into the two optical fiber adapter heads 11, and the port is cut smoothly.
In the test, if the part to be tested is an optical fiber ring, the test end is an interface of the second FC flange 122 or the third FC flange 123 below the device; if the part to be measured is the Y waveguide 10 or the coupler, measuring the output optical power of the FC flange interface 12 to be used by using an optical power tester according to the type of the optical fiber at the end to be measured, wherein the total measurement is more than or equal to 3 times, and recording the maximum value as the optical power P at the input end in As shown in fig. 4.
Referring to fig. 5, the test end adapter 11 is matched and butted with the FC flange interface 12 according to the type of the optical device to be tested and the type of the optical fiber pigtail.
Referring to fig. 5, the optical power output at the other end of the optical device under test is measured using an optical power tester,the total measurement is more than or equal to 3 times, and the maximum value is recorded and used as the optical power P of the output end out 。
Substituting the above measurement value into α= -10lg (P out /P in ) Alpha is the insertion loss value of the optical device to be measured.
Referring to fig. 6, the output of the optical device under test is interfaced with the input FC flange interface 12 of the extinction ratio tester.
And (3) rotating an output end adapting head 11 of the device to be tested, observing the output number of the extinction ratio tester, and recording the maximum value, wherein the maximum value is the extinction ratio of the device.
The optical power tester and the extinction ratio tester in this embodiment are both directly selected from the prior art, so specific working principles and working processes thereof are not described in detail.
Although specific embodiments of the utility model have been described in detail with reference to the accompanying drawings, it should not be construed as limiting the scope of protection of the present patent. Various modifications and variations which may be made by those skilled in the art without the creative effort are within the scope of the patent described in the claims.
Claims (7)
1. An apparatus for measuring an optical index of an optical device, comprising: comprises a case; the chassis is provided with a switch, the switch is arranged at the input end of the transformer, and the output end of the transformer is respectively and electrically connected with the cooling fan and the light source plate; the light source plate is electrically connected with the digital display ammeter and the light source in sequence; the tail fiber of the light source is connected with the input end of the first polarization maintaining coupler, and the two output ends of the first polarization maintaining coupler are respectively connected with the input end of the second polarization maintaining coupler and the input end of the single-mode coupler;
the output end of the second polarization maintaining coupler is sequentially connected with the first adapter and the first FC flange, and the first FC flange is a testing end of the polarization maintaining optical fiber;
one end of a tail fiber at one output end of the single-mode coupler is sequentially connected with a fourth adapter and a fourth FC flange, and the fourth FC flange is a test end of a single-mode fiber;
one end of a tail fiber of the other output end of the single-mode coupler is connected with the input end of the Y waveguide, one output end of the Y waveguide is sequentially connected with the second adapter and the second FC flange, and the other output end of the Y waveguide is sequentially connected with the third adapter and the third FC flange; the second FC flange and the third FC flange are fiber loop testing ends.
2. The apparatus for measuring optical index of an optical device according to claim 1, wherein: the transformer is fixed in the chassis through screws; the switch, the digital display ammeter, the first FC flange, the second FC flange, the third FC flange and the fourth FC flange are all arranged on a front panel of the case.
3. The apparatus for measuring optical index of an optical device according to claim 1, wherein: the second FC flange and the third FC flange are positioned below the front panel, and the first FC flange and the fourth FC flange are positioned above the front panel.
4. The apparatus for measuring optical index of an optical device according to claim 1, wherein: the radiating fans are arranged on the chassis shell and are distributed near the transformer.
5. The apparatus for measuring optical index of an optical device according to claim 1, wherein: the single-mode coupler, the first polarization maintaining coupler, the Y waveguide, the second polarization maintaining coupler, the light source plate and the light source are all assembled on a fiber optic gyroscope base, and the fiber optic gyroscope base is fixed inside a case through screws.
6. The apparatus for measuring optical index of an optical device of claim 5, wherein: the fiber optic gyroscope base and the transformer are respectively arranged at two sides of the chassis.
7. The apparatus for measuring optical index of an optical device according to claim 1, wherein: rubber stilts with adjustable height are arranged at the bottom of the case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320248845.7U CN219104324U (en) | 2023-02-17 | 2023-02-17 | Device for measuring optical index of optical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320248845.7U CN219104324U (en) | 2023-02-17 | 2023-02-17 | Device for measuring optical index of optical device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219104324U true CN219104324U (en) | 2023-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320248845.7U Active CN219104324U (en) | 2023-02-17 | 2023-02-17 | Device for measuring optical index of optical device |
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| Country | Link |
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| CN (1) | CN219104324U (en) |
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- 2023-02-17 CN CN202320248845.7U patent/CN219104324U/en active Active
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