CN107588917B - An online shock and vibration test system for tunable optical filters - Google Patents
An online shock and vibration test system for tunable optical filters Download PDFInfo
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- CN107588917B CN107588917B CN201710940915.4A CN201710940915A CN107588917B CN 107588917 B CN107588917 B CN 107588917B CN 201710940915 A CN201710940915 A CN 201710940915A CN 107588917 B CN107588917 B CN 107588917B
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Abstract
本发明涉及可调光学滤波器技术领域，具体涉及一种可调光学滤波器的在线冲击振动测试系统，所述在线冲击振动测试系统包括可调光滤波器、宽带光源和可调光源，以及第一光电转换器、第二光电转换器、数据采集模块和处理单元，所述宽带光源发射第一光信号并经过可调光滤波器入射至第一光电转换器，所述可调光源发射第二光信号并经过可调光滤波器入射至第二光电转换器。测试可调滤波器在在线在线冲击及在线冲击振动条件下一次性测试频率漂移及功率损耗，并且，将两个检测系统通过环行器整合后，可以同时测试出可调滤波器在外来毫秒数量级的在线冲击或在线冲击振动时，引起的波长漂移和插损变化，排队分立测试时系统误差引入的测试误差，提高准确性。
The present invention relates to the technical field of adjustable optical filters, and specifically to an online impact vibration test system for an adjustable optical filter, wherein the online impact vibration test system comprises an adjustable optical filter, a broadband light source and an adjustable light source, as well as a first photoelectric converter, a second photoelectric converter, a data acquisition module and a processing unit, wherein the broadband light source emits a first optical signal and is incident on the first photoelectric converter through the adjustable optical filter, and the adjustable light source emits a second optical signal and is incident on the second photoelectric converter through the adjustable optical filter. The adjustable filter is tested for frequency drift and power loss at one time under online impact and online impact vibration conditions, and after integrating the two detection systems through a circulator, the wavelength drift and insertion loss change caused by the external online impact or online impact vibration of the adjustable filter in the order of milliseconds can be tested simultaneously, and the test error introduced by the system error during the separate test can be eliminated, thereby improving the accuracy.
Description
Technical Field
The invention relates to the technical field of adjustable optical filters, in particular to an online impact vibration testing system of an adjustable optical filter.
Background
An optical filter is an instrument for wavelength selection that selects a desired wavelength from among a plurality of wavelengths, and light other than that wavelength is rejected. It can be used for wavelength selection, noise filtering of optical amplifier, gain equalization, optical multiplexing/demultiplexing.
The tunable optical filter based on grating and MEMS mirror is popular with the popularization of 200Gbps and 400Gbps metropolitan area and data network transmission, and is mainly used for suppressing ASE noise in amplified transmission signals.
However, because the MEMS mirror is sensitive to external on-line impact vibration and on-line impact, the device often causes a larger shift in the locked frequency due to external instantaneous on-line impact vibration or on-line impact during normal operation, usually at 20 ghz-80 ghz, and finally may cause interruption of the transmission signal.
In particular, in the existing on-line impact vibration and on-line impact sensitivity test of the adjustable optical filter, the on-line impact vibration and impact sensitivity test is generally used for testing the overall power change caused by on-line vibration or impact, and the calculated wavelength (frequency) drift amount cannot accurately reflect the actual wavelength (frequency) drift due to the insertion loss change of the adjustable optical filter.
Disclosure of Invention
The invention aims to solve the technical problems that the online impact vibration testing system of the adjustable optical filter is provided for solving the problems that the online impact of the optical filter cannot be obtained, the frequency drift and the power loss can be tested once under the online impact vibration condition, and the test data is inaccurate.
The technical scheme adopted by the invention for solving the technical problems is that an online impact vibration testing system of an adjustable optical filter is provided, the online impact vibration testing system comprises the adjustable optical filter, a broadband light source, an adjustable light source, a first photoelectric converter, a second photoelectric converter, a data acquisition module and a processing unit, wherein the broadband light source emits a first optical signal and is incident to the first photoelectric converter through the adjustable optical filter, the adjustable light source emits a second optical signal and is incident to the second photoelectric converter through the adjustable optical filter, the data acquisition module is respectively connected with the first photoelectric converter, the second photoelectric converter and the processing unit,
The data acquisition module acquires a first electric signal converted by the first photoelectric converter and acquires a second electric signal converted by the second photoelectric converter respectively;
The processing unit acquires electric signals corresponding to the first optical signals and the second optical signals which pass through the adjustable optical filter in impact or/and vibration at the same time, acquires power changes corresponding to the first optical signals and the second optical signals, and calculates the actual wavelength drift amount and insertion loss change of the adjustable optical filter according to the power changes.
The broadband light source emits a first light signal, sequentially passes through the first circulator, the tunable optical filter and the second circulator and is incident to the first photoelectric converter, and the tunable light source emits a second light signal, sequentially passes through the second circulator, the tunable optical filter and the first circulator and is incident to the second photoelectric converter.
The preferred scheme is that the first circulator and the second circulator are respectively arranged at two sides of the adjustable light filter.
The online impact vibration testing system further comprises an impact vibration testing platform, the adjustable light filter is arranged on the impact vibration testing platform, and the impact vibration testing platform drives the adjustable light filter to realize impact or/and vibration.
The online impact vibration testing system further comprises a control module connected with the impact vibration testing platform, and the control module controls impact or/and vibration of the impact vibration testing platform according to preset parameters.
The control module is preferably arranged in the processing unit.
The preferred proposal is that the processing unit comprises an electric signal interception module, a broadband light source processing module and an adjustable light source processing module,
The electric signal interception module is connected with the data acquisition module and acquires electric signals corresponding to the first optical signal and the second optical signal which pass through the adjustable optical filter in the impact or/and vibration simultaneously;
The broadband light source processing module acquires the insertion loss change of the adjustable light filter according to the power change corresponding to the first electric signal;
The adjustable light source processing module obtains the power change corresponding to the frequency change according to the frequency change corresponding to the second electric signal, and obtains the actual wavelength drift amount of the adjustable light filter according to the power change corresponding to the frequency change and the spectrum of the adjustable light filter.
The preferred scheme is that the processing unit is a computer.
Compared with the prior art, the invention has the beneficial effects that the on-line impact vibration test system of the adjustable optical filter is designed to test the frequency drift and the power loss of the adjustable filter under the on-line impact and on-line impact vibration conditions, and after the two detection systems are integrated through the circulator, the wavelength drift and the insertion loss change caused by the on-line impact or on-line impact vibration of the adjustable filter in the order of magnitude of external milliseconds can be tested at the same time, the test error introduced by the system error during the queuing discrete test is improved, and the test accuracy is improved.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of an on-line impact vibration testing system according to the present invention;
FIG. 2 is a schematic diagram of an on-line impact vibration testing system according to the present invention;
fig. 3 is a block diagram of the processing unit of the present invention.
Detailed Description
Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1 and 2, the present invention provides a preferred embodiment of an on-line shock vibration testing system for a tunable optical filter.
An on-line impact vibration testing system of an adjustable optical filter comprises the adjustable optical filter 20, a broadband light source 11, an adjustable optical source 12, a first photoelectric converter 41, a second photoelectric converter 42, a data acquisition module 50 and a processing unit 60, wherein the broadband light source 11 emits a first optical signal and is incident to the first photoelectric converter 41 through the adjustable optical filter 20, the adjustable light source 12 emits a second optical signal and is incident to the second photoelectric converter 42 through the adjustable optical filter 20, and the data acquisition module 50 is respectively connected with the first photoelectric converter 41, the second photoelectric converter 42 and the processing unit 60.
Specifically, the data acquisition module 50 acquires the first electrical signal converted by the first photoelectric converter 41 and the second electrical signal converted by the second photoelectric converter 42, and the processing unit 60 acquires the electrical signals corresponding to the first optical signal and the second optical signal of the tunable optical filter 20 which pass through the impact or/and vibration at the same time, acquires the power changes corresponding to the first optical signal and the second optical signal, and calculates the actual wavelength drift amount and the insertion loss change of the tunable optical filter according to the power changes.
Among them, an adjustable optical filter is an instrument for wavelength selection that can select a desired wavelength from among a plurality of wavelengths, and light other than this wavelength will be rejected. It can be used for wavelength selection, noise filtering of optical amplifier, gain equalization, optical multiplexing/demultiplexing.
The photoelectric converter is a device similar to a baseband MODEM (digital MODEM), and is different from the baseband MODEM in that an optical fiber dedicated line is connected to the baseband MODEM, and is an optical signal. The photoelectric converter (another name optical fiber transceiver) is divided into a hundred megafiber transceiver and a giga fiber transceiver, is a fast Ethernet, has a data transmission rate of 1Gbps, still adopts a CSMA/CD access control mechanism and is compatible with the existing Ethernet, under the support of a wiring system, the original fast Ethernet can be smoothly upgraded and the original investment of a user can be fully protected, and the giga network technology becomes the preferred technology of new network and transformation, thereby the performance requirement of the comprehensive wiring system is also improved.
Wherein the data collection is a bridge where the computer is connected to the outside physical world. The data acquisition module 50 is composed of sensors, controllers, and other units. The data acquisition card, the data acquisition module 50, the data acquisition instrument and the like are all data acquisition tools.
In this embodiment, the on-line impact vibration test system further includes a first circulator 31 and a second circulator 32, wherein,
Further, the broadband light source 11 emits a first light signal and sequentially passes through the first circulator 31, the tunable optical filter 20 and the second circulator 32, and is incident on the first photoelectric converter 41, and the tunable light source 12 emits a second light signal and sequentially passes through the second circulator 32, the tunable optical filter 20 and the first circulator 31, and is incident on the second photoelectric converter 42.
Preferably, the first circulator 31 and the second circulator 32 are respectively disposed at both sides of the tunable optical filter 20. Specifically, the first circulator 31 includes an input port A1, an input port A2, an output port A1 and an output port A2, the input port A1 being aligned with the emission port of the broadband light source 11, the input port A2 being aligned with the tunable optical filter 20, the output port A1 being aligned with the tunable optical filter 20, the output port A2 being aligned with the second photoelectric converter 42, and the second circulator 32 includes an input port B1, an input port B2, an output port B1 and an output port B2, the input port B1 being aligned with the emission port of the tunable light source 12, the input port B2 being aligned with the tunable optical filter 20, the output port B1 being aligned with the tunable optical filter 20, the output port B2 being aligned with the first photoelectric converter 41, specifically, the broadband light source 11 emitting a first optical signal and sequentially passing through the input port A1, the output port A1, the tunable optical filter 20, the input port B2 and the output port B2 being incident on the first photoelectric converter 41, and the tunable light source 12 emitting a second optical signal sequentially passing through the input port B1, the output port B2 and the output port B2 being incident on the first photoelectric converter 42.
The circulator is a multi-port device which transmits the incident wave entering any port of the circulator into the next port according to the direction determined by the static magnetic field. A circulator is a non-reciprocal device having several ends. The high-frequency signal energy transmitter has the remarkable characteristics of unidirectional transmission of high-frequency signal energy, is divided into micro-optical fibers and electronic circulators, and has good application in isolators, diplexers and reflective amplifiers. In this embodiment, the broadband light source 11 emits an optical signal and sequentially passes through the first circulator 31, the tunable optical filter 20, and the second circulator 32, and is incident on the second photoelectric converter 42, and the tunable light source 12 emits an optical signal and sequentially passes through the second circulator 32, the tunable optical filter 20, and the first circulator 31, thereby realizing simultaneous passing through the tunable optical filter 20.
In this embodiment, the online impact vibration testing system further includes an impact vibration testing platform 70, the tunable optical filter 20 is disposed on the impact vibration testing platform 70, and the impact vibration testing platform 70 drives the tunable optical filter 20 to implement impact or/and vibration.
Further, the online impact vibration testing system further comprises a control module 80 connected with the impact vibration testing platform 70, wherein the control module 80 controls the impact vibration testing platform 70 to impact or/and vibrate according to preset parameters.
The processing unit 60 includes a memory module, where the memory module includes several levels of on-line impact vibration intensity, and the on-line impact vibration intensity includes at least a weak level, a medium level, and a strong level. And the online impact vibration types comprise three types of impact, vibration and impact plus vibration.
Preferably, the controller is a voltage controller, and the processing unit 60 controls an output voltage of the voltage controller, and the online impact vibration platform performs online impact vibrations with different intensities according to the received voltage.
Preferably, the control module 80 is provided in the processing unit 60.
As shown in FIG. 3, the present invention provides a preferred embodiment of a processing unit.
The processing unit 60 comprises an electrical signal interception module 61, a broadband light source processing module 62 and a tunable light source processing module 63.
Specifically, the electric signal interception module 61 is connected to the data acquisition module 50 and acquires electric signals corresponding to the first optical signal and the second optical signal that pass through the tunable optical filter 20 in impact or/and vibration, the broadband light source processing module 62 acquires the insertion loss variation of the tunable optical filter 20 according to the power variation corresponding to the first electric signal, and the tunable light source processing module 63 acquires the power variation corresponding to the frequency variation according to the frequency variation corresponding to the second electric signal, and acquires the actual wavelength drift amount of the tunable optical filter 20 according to the power variation corresponding to the frequency variation and the spectrum of the tunable optical filter 20.
Preferably, the processing unit 60 is a processor and peripheral circuits, and the electric signal interception module 61, the broadband light source processing module 62 and the adjustable light source processing module 63 are preferably functional modules or virtual modules disposed inside the processor.
Preferably, the processing unit 60 is a computer.
The foregoing description of the preferred embodiments of the present invention is not intended to limit the scope of the invention, but rather is intended to cover all modifications and variations within the scope of the present invention as defined in the appended claims.
Claims (8)
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Address after: No.35 Cuijing Road, Pingshan District, Shenzhen City, Guangdong Province Applicant after: Ona Technology (Shenzhen) Group Co.,Ltd. Address before: No.35 Cuijing Road, Pingshan District, Shenzhen City, Guangdong Province Applicant before: O-NET COMMUNICATIONS (SHENZHEN) Ltd. |
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