CN103217215A - Automatic calibration method for optical power meter - Google Patents
Automatic calibration method for optical power meter Download PDFInfo
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- CN103217215A CN103217215A CN2013100687724A CN201310068772A CN103217215A CN 103217215 A CN103217215 A CN 103217215A CN 2013100687724 A CN2013100687724 A CN 2013100687724A CN 201310068772 A CN201310068772 A CN 201310068772A CN 103217215 A CN103217215 A CN 103217215A
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Abstract
The invention provides an automatic calibration method for an optical power meter. A programmable computer serving as a core control unit is connected with an automatic calibration unit. The automatic calibration unit is composed of a light source input module, a light source changing-over module, a wavelength changing-over module, an optical attenuator module and a real-time online beam splitting sampling module all of which are connected in sequence, wherein the optical attenuator module can automatically adjust gains. The real-time online beam splitting sampling module comprises an optical branching device and a built-in optical power meter, one path of an output end of the optical branching device is connected with a calibration light interface, and the other path of the output end of the optical branching device is connected with the built-in optical power meter. The control unit adjusts a light source mode, the wavelength and light output power under the program control, and the output light power is enabled to reach a preset parameter. The control unit reads a value of the built-in optical power meter and transmits the value to an external optical power meter to be calibrated. The automatic calibration of the optical power meter is achieved by manners that the optical branching device and built-in optical power meter are introduced and functional modules are integrally connected.
Description
Technical field
The invention belongs to light calibrating indicating instrument field, be specifically related to a kind of light power meter self-checking device and method.
Background technology
Light power meter is that optical fiber is requisite basic test instrument in the communication test field.Light power meter calibration operation under the prior art is realized calibration by comparing with the etalon optical power meter.
As Fig. 1, standard sources at first is connected to etalon optical power meter A by optical attenuator; On the test wavelength, adjust optical attenuator, use fiber optical power reach the calibration performance number (as-10dBm) and the test number of record etalon optical power meter this moment;
And then standard sources is connected to equipment B to be calibrated by optical attenuator;
Computing machine connects equipment to be calibrated, and the etalon optical power meter reading value that writes down just now is dealt into equipment to be calibrated, calibrates.
At different wave length and different capacity point, above-mentioned steps need repeat.
From above introduction, can see and have following shortcoming:
Manually-operated, complex steps, efficient are low.
Uncontrollable node is many, and influence factor is many.
This calibrating mode is not become prerequisite with the luminous power that light source is exported, and the etalon optical power meter reading that read above a moment during calibration is that benchmark is calibrated; Therefore under the prior art with reference to light source, in fact be not the same light source of real meaning.
Above factor affecting fiber optical power change is unfavorable for that calibration accurately.
Summary of the invention
The present invention is directed to shortcoming and problem that existing light power meter calibration exists, a kind of light power meter self-checking device and method are provided, eliminated that the uncontrollable node of prior art is many, the external interference factor is many, the inaccurate shortcoming of precision, but mode by real-time online beam split sampling, realize same light source real time calibration truly, improved degree of accuracy greatly, reduced manual intervention, effectively boost productivity, reduce cost, satisfy the production demand that increases day by day, have revolutionary meaning.
The present invention realizes that the technical scheme of its target is:
The light power meter self-checking device is used to treat alignment light power meter instrument and calibrates, and it is characterized in that: comprise automatic alignment unit and centralized control unit, alignment unit is connected with centralized control unit automatically.
Described automatic alignment unit comprises the multi-wavelength stable light source, but wavelength switching controls module, optical attenuator real-time online beam split sampling module;
Described multi-wavelength stable light source, but wavelength switching controls module, optical attenuator real-time online beam split sampling module connect successively;
But real-time online beam split sampling module connects centralized control unit;
Multi-wavelength stable light source, wavelength switching controls module, optical attenuator are connected with centralized control unit respectively;
The built-in communication part of described centralized control unit perhaps connects the external communication assembly.
Further, but described real-time online beam split sampling module comprises optical branching device, built in light power meter;
One tunnel output of described optical branching device connects output optical alignment interface; The optical alignment interface connects outside instrument to be calibrated; Another road output of optical branching device connects the built in light power meter; The built in light power meter connects centralized control unit, but the luminous power of real-time online measuring output.
Better, described optical attenuator is for regulating the optical attenuator of gain automatically;
Further, described multi-wavelength stable light source comprises that output of single-mode optics source or the output of multimode light source or both have concurrently; Corresponding respectively with it, described automatic alignment unit is the automatic alignment unit of single mode that is suitable for the output of single mode light source; Or for being suitable for the automatic alignment unit of multimode of multimode light source output; Perhaps both have concurrently.
Automatically the structure of alignment unit composition is applicable to the automatic alignment unit of single mode, the automatic alignment unit of multimode; That is, its basic structure is consistent, and according to the difference of single mode light source, multimode light source, relevant interface etc. are done accommodation.
In order further to improve the performance dirigibility of device, described wavelength switching controls module is also set up external light source access port.
The multi-wavelength stable light source that described automatic alignment unit comprises, but wavelength switching controls module, optical attenuator real-time online beam split sampling module are integrated tight assembly; Or be parts independently separately; Be connected with the centralized control unit assembly during use.
Centralized control unit can be microcontroller assembly or the stand-alone computer with control and treatment function, also can with the multi-wavelength stable light source, but the tight assembly that wavelength switching controls module, optical attenuator real-time online beam split sampling module are formed is integrated.
Each assembly, the unit package of device are integrated tight assembly, and because of the simple reliability that makes of structure improves, space and cost also significantly reduce.
Realize that module, the assembly of above-mentioned each function also can be made up of autonomous device respectively, during use according to
The light power meter self-checking device also comprises the Input/Output Device interface, and the input equipment interface connects input equipment, such as keyboard; The output device interface connects output device, for example display screen; Be typically the LCD touch-screen of integrated input, output function.
If no special instructions, the optical device of describing in the literary composition all is applicable to single mode, multimode dual mode.
The present invention provides a kind of light power meter automatic Calibration Method simultaneously, being used to treat the alignment light power meter calibrates, comprise: control able to programme be the control core unit with the computing machine, but with have the automatic alignment unit that light source input, light source are switched, wavelength switches, can regulate the optical attenuator real-time online beam split sampled functions of gain automatically and be connected, automatic alignment unit built in light power meter, automatically alignment unit is calibrated the light power meter outside to be calibrated that connects under the programmed control of control module.
But described automatic alignment unit is connected successively by light source load module, light source handover module, wavelength handover module, the optical attenuator module real-time online beam split sampling module that can regulate gain automatically, light source handover module, wavelength handover module, optical power attenuation module are that the control core unit is connected respectively and communication with the computing machine with control able to programme, are being to operate under the control core unit controls with the computing machine; But real-time online beam split sampling module comprises optical branching device and built in light power meter, the optical branching device input end is connected with the output terminal of optical power attenuation module, optical branching device output terminal one tunnel connects the alignment light interface, the other end of optical branching device output connects the built in light power meter, and what the built in light power meter connected control able to programme is the control core unit with the computing machine; In the calibration process, control module is adjusted light source mode, wavelength, optical output power gain reduction ratio under programmed control, make Output optical power reach requirement; Control module can read the numerical value of built in light power meter, and this numerical value is passed to outside light power meter to be calibrated.
Described method will realize each functional module combination of calibration, and be integrated and connected; But and in calibration process, use real-time online beam split sampling module, realize same light source real-time sampling calibration; With control able to programme be under the control core unit controls with the computing machine, multiple light courcess, multi-wavelength, many power point auto-calibration; Once connect and just can calibrate in batches, need not change.
Its automatic calibration steps is as follows:
Before calibration beginning in batches, at first the external perimysium reference light power meter is connected the alignment light interface, and with control able to programme be the control core unit communications with the computing machine, be mete-wand with the external perimysium reference luminous power, built-in light power meter is calibrated;
Then, outside light power meter to be calibrated connects the alignment light interface, and with control able to programme be the control core unit communications with the computing machine, count mete-wand with built in light power, outside light power meter to be calibrated is calibrated;
The multi-wavelength stable light source provides the light of the required wavelength of calibration; Under the control module programmed control, wavelength switching controls module is used for switching the light of respective wavelength to the corresponding port; Under the control module programmed control, optical attenuator is regulated gain, and utilization can be regulated the optical attenuator of gain automatically, adjusts Output optical power, reaches required calibration point; Thereby be implemented under the Different Light, under the different wave length, different capacity point regulates calibration automatically automatically.
Because control module has communication function, therefore also can be implemented in outside or remote computer programmed control down or interactive instruction control down, calibrating installation is operated.
But owing to introduce real-time online beam split sampling module, realize same light source real time calibration, the fiber light power stabilising once connects in the calibration process and just can calibrate in batches, need not change; Multiple light courcess, multi-wavelength, many power point auto-calibration.
The present invention has very outstanding outstanding effect by said structure and method, realizes same light source real time calibration truly, and the fiber light power stabilising has thoroughly been broken away from many drawbacks of manual calibration, has realized the automatic calibration of light power meter; Greatly improved calibration accuracy.
Description of drawings
Fig. 1 is the light power meter calibration synoptic diagram under the prior art.
Fig. 2 realizes theory diagram for the present invention.
Fig. 3 is the signal of an embodiment of the present invention implementation.
Fig. 4 is the signal of another embodiment of the present invention implementation.
Fig. 5 is self check process flow signal of the present invention.
Fig. 6 is the self check process of wavelength of the present invention at 1310nm.
Fig. 7 calibrates the flow process signal for wavelength of the present invention automatically at 1310nm.
Fig. 8 illustrates in 1310nm automatic gauging flow process for wavelength of the present invention.
Accompanying drawing described herein is used to provide the further understanding to invention, constitutes a part of the present invention, and illustrative examples of the present invention and explanation are used to explain the present invention, do not constitute improper qualification of the present invention.
Embodiment
Below by particular specific embodiment, implementation of the present invention is described, those skilled in the art can understand other advantage of the present invention and beneficial effect easily by the content that this instructions discloses.The present invention also can be realized and used by other different specific embodiments.Every details of the present invention also can carried out various modifications and variation based on different viewpoints and application under prerequisite of the present invention.
Being preferred embodiment of the present invention below, is not the protection domain that this patent limits.All within the spirit and principle of this patent, the modification of being done, be equal to replacement, improve, all be included within protection scope of the present invention.
Below in conjunction with accompanying drawing, further the embodiment of the invention is described and specifically describes, so that understand meaning of the present invention more clearly.
In conjunction with the preferred embodiments, describe specific embodiments of the present invention in detail.
Embodiment 1: with the single mode light source is example, as Fig. 2.
The light power meter self-checking device is used to treat alignment light power meter instrument and calibrates, and it is characterized in that: comprise automatic alignment unit and centralized control unit, alignment unit is connected with centralized control unit automatically.
Described automatic alignment unit comprises the multi-wavelength stable light source, but wavelength switching controls module, optical attenuator real-time online beam split sampling module;
Described multi-wavelength stable light source, but wavelength switching controls module, optical attenuator real-time online beam split sampling module successively light connect;
But real-time online beam split sampling module connects centralized control unit;
Multi-wavelength stable light source, wavelength switching controls module, optical attenuator are connected with centralized control unit respectively; Therefore can under the control of centralized control unit, carry out multi wave length illuminating source conversion, wavelength switching and light intensity decays and regulate; Optical attenuator is for regulating the optical attenuator of gain automatically; Under the steering order of centralized control unit, carry out gain transformations automatically, and then regulate the power level of output light signal.
Described centralized control unit is programmable computing machine, and built-in communication part perhaps connects the external communication assembly, with instrument to be calibrated, external smart compunication.
Centralized control unit is connected with the external smart computing machine by communication part, and the line data of going forward side by side exchanges and communicates by letter; The communication form is wired or wireless, serial ports or network interface, and then realize long-range, controlled in wireless.
But described real-time online beam split sampling module is realized the Output optical power of same light source is monitored in real time, comprises optical branching device and built in light power meter;
One tunnel output of described optical branching device connects output optical alignment interface; The optical alignment interface connects outside instrument to be calibrated; Another road output of optical branching device connects the built in light power meter; The built in light power meter connects centralized control unit, but the luminous power of real-time online measuring output.This structure has realized same light source real time calibration truly, has improved degree of accuracy greatly;
Optical attenuator is for regulating the optical attenuator of gain automatically; Under the steering order of centralized control unit, carry out gain transformations, and then regulate the intensity of output light signal.
In the present embodiment, the light power meter self-checking device is applied to the single mode light source, is the implementation structure example under the single mode light source way of output.
In the practical application, before calibrating in batches, at first count mete-wand, the built in light power meter of device is calibrated with external etalon optical power; Insert equipment to be calibrated then, this moment, mete-wand was the built in light power meter.
Centralized control unit is programmable computing machine, and has communication function, realizes the information interchange between each module, and in time sends control signal, adjusts.
Therefore, whole device is under programmed control, automatically realize light source conversion, wavelength Conversion, attenuation transform, the measurement numerical value of built in light power meter is passed to instrumentation to be calibrated, instrumentation to be calibrated is that standard is calibrated with the measurement numerical value of built in light power meter.
Embodiment 2: in the present embodiment, the structure of light power meter self-checking device is formed substantially the same manner as Example 1; Different is that alignment unit is the automatic alignment unit of multimode that is applicable to the output of multimode light source automatically.The structure of automatic alignment unit of multimode and the automatic alignment unit of single mode is basic identical, and just relevant interface etc. is applicable to the output of multimode light source.
Embodiment 3: see Fig. 3.In the present embodiment, the light power meter self-checking device except having the automatic alignment unit of single mode that is applicable to the output of single mode light source, also has the automatic alignment unit of multimode that is applicable to the output of multimode light source.The structure of automatic alignment unit of multimode and the automatic alignment unit of single mode is basic identical, just is applicable to the output of multimode light source, and corresponding component is made accommodation.
In order to improve the extended capability of equipment, in the various embodiments described above, wavelength switching controls module is also set up external light source access port, can import external light source, has strengthened the light source input capability; As Fig. 4.
Among the above embodiment, in order to realize better operation ease, the present invention also is provided with the input-output device interface, connects input equipment, output device.Input equipment, output device be integrated be arranged in the light power meter self-checking device or input equipment, output device external.
Typically, input equipment is a keyboard, and output device is a display screen.Preferred version is the LCD touch display screen with touch-input function under the prior art at present.
For realizing technical goal of the present invention, each ingredient of light power meter self-checking device, each component units---multi-wavelength stable light source, wavelength switching controls module, optical attenuator, optical branching device, but real-time online beam split sampling module, and centralized control unit, can be encapsulated in one, become the integrated instrument of a tight structure;
Also can have a style of one's own respectively, separately as autonomous device, each autonomous device connects use according to aforesaid way during use, and assembly is flexible.
The multi-wavelength stable light source comprises the output of single-mode optics source, the output of multimode light source;
Described multi-wavelength stable light source, optical attenuator, wavelength switch control unit all are applicable to single mode, multimode.Optical interface is done adapt according to the light source situation.
Device used in the literary composition also can be called instrument, platform, system according to custom.The power meter of built in light described in the literary composition is at the external perimysium reference light power meter, particular determination is not made in its position, as long as realize its function.
Operation instruction:
The built in light power meter at first with the external perimysium reference light power meter as standard source, carry out self check, self calibration, then as the calibration foundation and the judge of whole calibrating installation;
The multi-wavelength stable light source provides the light of the required wavelength of calibration;
Can regulate the optical attenuator of gain automatically and adjust output power, reach required calibration point;
Wavelength switching controls module is used for switching the light of respective wavelength to the corresponding port;
Centralized control unit is the control center of whole device, functions such as implementation procedure control, Communication Control.
Centralized control unit by automatic control, has been realized multi-wavelength calibration and check automatically in conjunction with automatic alignment unit, comprehensive coverage the precision and the reliability of calibration.
During use, instrument to be calibrated only need use an optical fiber cable to be connected to the alignment light interface, and establishes a communications link with centralized control unit, just can finish the calibration and the check of all wavelengths under the respective sources pattern (single mode, multimode).Realized that the luminous power of light power meter calibration process monitors in real time, realized a plurality of calibration point auto-calibrations of instrument gamut.
Before calibration beginning in batches, at first the external perimysium reference light power meter is connected the alignment light interface, and with control able to programme be the centralized control unit communication of core with the computing machine, be mete-wand with the external perimysium reference light power meter, built-in luminous power is calibrated;
System self-test also claims self calibration, is the automatic preliminary work before equipment uses calibration automatically.
Fig. 5 has represented system under automatic mode, is the self check flow process of example with single mode four wavelength (as 1310nm, 1490nm, 1550nm, 1625nm);
Fig. 6 is an example with 1310nm self check process, and the self check process of each wavelength is described;
Then, outside light power meter to be calibrated connects the alignment light interface, and with control able to programme be the centralized control unit communication of core with the computing machine, count mete-wand with built in light power, luminous power is internally put in the outside calibrates.
After System self-test is finished, can carry out automatic alignment light power meter, by button or the automatic calibration process of instruction triggers.Fig. 7 is an example explanation calibration flow process automatically with single mode 1310nm;
Automatically after calibration was finished, system also can carry out automatic gauging, connected mode as above, by button or instruction triggers automatic gauging process.Fig. 8 is an example explanation workflow with single mode 1310nm;
Can illustrate that from above-mentioned example the present invention has realized automatic calibration by the above technical scheme, has reached purpose of the present invention; Effectively reduce, reduced or eliminated the disturbing factor that influences calibration accuracy in the calibration process, improved reliability, the consistance of calibration; Greatly promoted production efficiency of products and quality control ability, the suitable bulk article of technical scheme is calibrated automatically, automatic gauging, and the product of calibrating, the precision height, and uniform quality is good, satisfies the quality requirements of high-precision calibration.
Obviously, the present invention does not limit and is used for the alignment light power meter, under the guidance of inventive concept, can also be used for the measurement and the related application of other parameters.
Though the present invention describes with reference to preferred embodiment and accompanying drawing, non-limiting yet above-mentioned explanation should be considered as illustrative, be familiar with the variation that this operator makes according to spirit of the present invention and revise the protection domain that should belong to this patent.
Claims (10)
1. the light power meter automatic calibrating method is used to treat the alignment light power meter and calibrates automatically, it is characterized in that:
Control able to programme be the centralized control unit of core with the computing machine, but with have the automatic alignment unit that light source input, light source are switched, wavelength switches, can regulate the optical attenuator real-time online beam split sampled functions of gain automatically and be connected, automatic alignment unit built in light power meter, automatically alignment unit is calibrated the light power meter outside to be calibrated that connects under the programmed control of centralized control unit.
2. according to the described light power meter automatic calibrating method of claim 1, it is characterized in that: but described automatic alignment unit is connected successively by light source load module, light source handover module, wavelength handover module, the optical attenuator module real-time online beam split sampling module that can regulate gain automatically, light source handover module, wavelength handover module, can regulate gain automatically optical attenuator module and control able to programme be that the centralized control unit of core is connected respectively and communication with the computing machine, under the centralized control unit control that with the computing machine is core, operate; The optical attenuator module that can regulate gain automatically comprises optical branching device, the optical branching device input end is connected with the output terminal of optical power attenuation module, optical branching device output terminal one tunnel connects the alignment light interface, the other end of optical branching device output connects the built in light power meter, and what the built in light power meter connected control able to programme is the centralized control unit of core with the computing machine; Calibrated in the process, centralized control unit is adjusted light source mode, wavelength, optical power attenuation ratio under programmed control, make the luminous power parameter of output reach requirement; Centralized control unit reads the numerical value of built in light power meter, and this numerical value is passed to outside light power meter to be calibrated.
3. according to claim 1,2 described light power meter automatic calibrating methods, it is characterized in that: described method will realize each functional module combination of light power meter calibration, and be integrated and connected; But and in calibration process, use real-time online beam split sampling module, realize same light source real-time sampling calibration; With control able to programme be under the centralized control unit control of core with the computing machine, multiple light courcess, multi-wavelength, many power point auto-calibration.
4. according to claim 1, the described light power meter automatic calibrating method of 2 arbitrary claims, its automatic calibration steps is as follows:
(1) before calibration begins in batches, at first the external perimysium reference light power meter is connected the alignment light interface, and with control able to programme be the centralized control unit communication of core with the computing machine, be mete-wand with the external perimysium reference light power meter, built-in light power meter is calibrated;
(2) then, outside light power meter to be calibrated connects the alignment light interface, and with control able to programme be the centralized control unit communication of core with the computing machine, count mete-wand with built in light power, light power meter is internally put in the outside calibrates.
5. according to the described light power meter automatic calibrating method of claim 3, its automatic calibration steps is as follows:
(1) before calibration begins in batches, at first the external perimysium reference light power meter is connected the alignment light interface, and with control able to programme be the centralized control unit communication of core with the computing machine, be mete-wand with the external perimysium reference light power meter, built-in light power meter is calibrated;
(2) then, outside light power meter to be calibrated connects the alignment light interface, and with control able to programme be the centralized control unit communication of core with the computing machine, count mete-wand with built in light power, light power meter is internally put in the outside calibrates.
6. light power meter automated calibration system, be used to realize the described function of the arbitrary claim of claim 1-5, to realize that treating alignment light power meter instrument calibrates, it is characterized in that: comprise automatic alignment unit and centralized control unit, automatically alignment unit is connected with centralized control unit, centralized control unit is programmable computing machine, and alignment unit is operated under the programmed control of centralized control unit automatically.
7. according to claims 6 described light power meter automated calibration systems, it is characterized in that:
Described automatic alignment unit comprises the multi-wavelength stable light source, but wavelength switching controls module, optical attenuator real-time online beam split sampling module;
Described multi-wavelength stable light source, but wavelength switching controls module, optical attenuator real-time online beam split sampling module connect successively;
But real-time online beam split sampling module connects centralized control unit;
Multi-wavelength stable light source, wavelength switching controls module, optical attenuator are connected with centralized control unit respectively;
The built-in communication part of described centralized control unit perhaps connects the external communication assembly.
8. light power meter automated calibration system according to claim 7 is characterized in that:
But described real-time online beam split sampling module is monitored the Output optical power of light source in real time, comprises optical branching device, built in light power meter;
One tunnel output of described optical branching device connects output optical alignment interface; The optical alignment interface connects outside instrument to be calibrated;
Another road output of optical branching device connects the built in light power meter; The built in light power meter connects centralized control unit, but the luminous power of real-time online measuring output.
9. according to claim 7,8 arbitrary described light power meter automated calibration systems, it is characterized in that: described optical attenuator is regulated Output optical power for regulating the optical attenuator of gain automatically under centralized control unit control.
10. according to claim 7,8,9 arbitrary described light power meter automated calibration systems, it is characterized in that: described multi-wavelength stable light source comprises that output of single-mode optics source or the output of multimode light source or both have concurrently.
Corresponding respectively with it, described automatic alignment unit is the automatic alignment unit of single mode that is suitable for the output of single mode light source; Or for being suitable for the automatic alignment unit of multimode of multimode light source output; Perhaps both have concurrently.
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| CN105933058B (en) * | 2016-04-20 | 2019-01-25 | 山东信通电子股份有限公司 | PON network equipment bidirectional transmit-receive optical power automatic calibrating method |
| CN105959059B (en) * | 2016-04-20 | 2019-03-15 | 山东信通电子股份有限公司 | The online accurate measurement method of PON network optical link loss |
| CN105792033B (en) * | 2016-04-20 | 2019-07-12 | 山东信通电子股份有限公司 | The accuracy controlling method of PON network business optical signal power |
| CN113113835A (en) * | 2021-04-08 | 2021-07-13 | 安徽养和医疗器械设备有限公司 | Automatic calibration system for curve of laser instrument |
| JP7432636B2 (en) | 2022-03-11 | 2024-02-16 | 日機装株式会社 | How to calibrate a light measurement device |
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