CN110266378A - A kind of method, apparatus, electronic equipment and the computer readable storage medium of on-line testing light receiving element interchannel isolation - Google Patents
A kind of method, apparatus, electronic equipment and the computer readable storage medium of on-line testing light receiving element interchannel isolation Download PDFInfo
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- CN110266378A CN110266378A CN201910454534.4A CN201910454534A CN110266378A CN 110266378 A CN110266378 A CN 110266378A CN 201910454534 A CN201910454534 A CN 201910454534A CN 110266378 A CN110266378 A CN 110266378A
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- resyc
- responsiveness
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07957—Monitoring or measuring wavelength
Abstract
The present invention relates to method, electronic equipment and the computer readable storage mediums of a kind of on-line testing light receiving element interchannel isolation.Method includes: to choose channel Y, obtains left cutoff wavelength λ L of band logical, the right cutoff wavelength λ R of band logical and the wavelength X C of band logical middle section of channel Y；Calculate responsiveness ResYL, ResYR, ResYC that wavelength X L, λ R, λ C respectively generate the channel Y；The difference between ResYC and ResYL and/or the difference between responsiveness ResYC and ResYR are spent according to response, judge the isolation of light receiving element interchannel.On-line testing method of the invention only needs to select a certain channel, tests 3 wavelength points responsivenesses, so that it may monitor the interchannel isolation of entire light receiving element, test method is simple, convenient for operation, can improve production efficiency, be conducive to produce in enormous quantities.
Description
Technical field
The present invention relates to fiber optic communication field more particularly to a kind of sides of on-line testing light receiving element interchannel isolation
Method, device, electronic equipment and computer readable storage medium.
Background technique
Current multi-channel high-speed light receiving element, especially LWDM device have the isolation of interchannel certain
It is required that needing to test the isolation of light receiving element interchannel in the production phase, to judge whether light receiving element is qualified.If
Remove test isolation again in the case where the assembly welding of light receiving element has been completed, then the defective products measured requires to return
Work.In order to reduce the ratio of doing over again, general way is all to introduce online isolation degree test in assembly welding step.
See that Fig. 1, Fig. 1 are the Demux plated film spectral line in typical 4 channel LWDM device, Lane0~3 in figure represent 4
Channel, in traditional online isolation degree test method, the channel Lane0 defines the short cutoff wavelength isolation in the channel Lane1
For Iso (0-1L)=10*log (Res12/max (Res01, Res02)), the Res12 in formula refers to responsiveness, the responsiveness
The public input port input of light receiving element is specifically directed towards when meeting the laser of wavelength requirement range in the channel Lane2, Lane1
Photoelectric current received by PD is divided by the obtained responsiveness of laser power, definition of Res01, Res02 and so in channel.For
Convenient for summary, the laser for the wavelength requirement range for meeting channel is referred to as channel wavelength light hereinafter.
According to the formula of upper section it is found that with 4 channel phases in traditional online 1 spectral line of isolation degree test method test chart
When isolation between mutually, needs at least to test 1~λ of λ, 8 eight wavelength points, and surveyed 2* (N-1)=6 isolation data, always
Need to read 4*N-2 responsiveness data in total altogether, in formula, N represents the port number of light receiving element, herein N=4.It is such
Test method is time-consuming longer, will substantially reduce production efficiency, therefore is unfavorable for the mass production of light receiving element.
Summary of the invention
The purpose of the present invention is reduce the time-consuming of on-line testing light receiving element interchannel isolation.
According to one aspect of the present invention, a kind of method of on-line testing light receiving element interchannel isolation is provided,
Including the following steps successively executed:
Channel Y is chosen, left cutoff wavelength λ L of band logical, the right cutoff wavelength λ R of band logical and band logical middle section of channel Y are obtained
Wavelength X C；
Calculate responsiveness ResYL, ResYR, ResYC that wavelength X L, λ R, λ C respectively generate the channel Y；
The difference between ResYC and ResYL and/or the difference between responsiveness ResYC and ResYR are spent according to response, are sentenced
The isolation of disconnected light receiving element interchannel.
Optionally, difference refers specifically to: the ratio between responsiveness ResYL and responsiveness ResYC；And/or responsiveness ResYR
With the ratio between responsiveness ResYC.
Optionally, further includes: control ResYL/ResYC < 1-x% and ResYR/ResYC < 1-x% connects to meet light
The insulated degree requirement between device channel is received, x is setting value in formula.
Optionally, the wavelength X C is specifically central wavelength.
According to another aspect of the invention, a kind of dress of on-line testing light receiving element interchannel isolation is provided
It sets, including successively executing with lower module:
Wavelength obtains module, is suitable for choosing channel Y, obtains left cutoff wavelength λ L of band logical, the right cut-off wave of band logical of channel Y
The long λ R and wavelength X C of band logical middle section；
Responsiveness computing module, suitable for calculate wavelength X L, λ R, λ C respectively to the channel Y generate responsiveness ResYL,
ResYR,ResYC；
Isolation degree test module, suitable for the difference and responsiveness ResYC spent between ResYC and/or ResYL according to response with
Difference between ResYR judges the isolation of light receiving element interchannel.
Optionally, difference refers specifically to: the ratio between responsiveness ResYL and responsiveness ResYC；And/or responsiveness ResYR
With the ratio between responsiveness ResYC.
Optionally, further include monitoring module, be suitable for: control ResYL/ResYC < 1-x% and ResYR/ResYC < 1-
X%, to meet the insulated degree requirement of light receiving element interchannel, x is setting value in formula.
Optionally, the wavelength X C is specifically central wavelength.
According to another aspect of the invention, a kind of electronic equipment is provided, wherein the electronic equipment includes:
Processor；And
It is arranged to the memory of storage computer executable instructions, the executable instruction makes the place when executed
Reason device executes above-mentioned method.
According to another aspect of the invention, a kind of computer readable storage medium is provided, wherein the computer can
It reads storage medium and stores one or more programs, one or more of programs when being executed by a processor, realize above-mentioned side
Method.
The utility model has the advantages that
On-line testing method of the invention only needs to select a certain channel (such as the channel lane0), tests 3 wavelength points responses
Degree, so that it may monitor the interchannel isolation of entire light receiving element, test method is simple, convenient for operation, can improve production effect
Rate is conducive to produce in enormous quantities.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects of the present invention, feature and advantage can
It is clearer and more comprehensible, the followings are specific embodiments of the present invention.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 shows the Demux plated film spectral line in typical 4 channel LWDM device；
Fig. 2 shows Demux plated film spectral lines to change the schematic diagram translated with incidence angle；
Fig. 3 shows the method for on-line testing light receiving element interchannel isolation according to an embodiment of the invention
Flow diagram；
Fig. 4 shows the plated film spectral line in the simplified channel lane0；
Fig. 5 shows the device of on-line testing light receiving element interchannel isolation according to an embodiment of the invention
Structural schematic diagram；
Fig. 6 shows the structural schematic diagram of electronic equipment according to an embodiment of the invention；
Fig. 7 shows the structural schematic diagram of computer readable storage medium according to an embodiment of the invention.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
It has been found that there are two characteristics for the channel tool of light receiving element in optical communication field:
First is that interrelated between the passband isolation strip in channel and the passband isolation strip of adjacency channel, which can refer to figure
λ 2 in 1, Fig. 1 is the right cutoff wavelength of passband in the channel lane0, according to wanting for existing CWDM, DWDM or LWDM communications protocol
It asks, wavelength X 2 has on the design isolation strip in the channel lane1, that is to say, that the public input port of light receiving element
The responsiveness A1 for receiving PD and generating in the channel lane1, inputs with the public input port when input wavelength 2 corresponding laser of λ
The responsiveness A2 for receiving PD and generating in the channel lane1, the two responsivenesses A1, A2 are necessary when the passband wavelength light in the channel lane1
Meet certain insulated degree requirement, it can be seen that, have between the passband isolation strip in channel and the passband isolation strip of adjacency channel
There are associated features；
Second is that the incidence angle variation of optical filter can bring spectral line integral translation in input laser and channel, since laser inputs
When in channel, and the optical filter in channel can there are incidence angles, and when incidence angle becomes smaller, plated film spectral line can be moved to right integrally, when
When incidence angle becomes larger, plated film spectral line can be moved to left integrally, be can refer to Fig. 2 herein and understood, in Fig. 2, this line of target is represented
The plated film spectral line that qualified light receiving element should have, when incidence angle becomes smaller, plated film spectral line is integrally moved to right, and plated film spectral line becomes
This line of smaller, due to the band logical (the spec line i.e. in figure) in channel be it is fixed, this can sacrifice the passband in channel in spectral line
Laser corresponding to left cutoff wavelength is to the isolation in its adjacent left-hand channel, conversely, plated film spectral line is whole when incidence angle becomes larger
Body moves to left, and plated film spectral line becomes this line of bigger, then can laser corresponding to the right cutoff wavelength of passband of victim way to it
The isolation in adjacent right side channel.It is hereinafter summary, laser corresponding to the left cutoff wavelength of the passband in channel is referred to as passband
Laser corresponding to the right cutoff wavelength of the passband in channel is referred to as the right cutoff wavelength light of passband by left cutoff wavelength light.
Based on two above-mentioned characteristics, the side of on-line testing light receiving element interchannel isolation as shown in Figure 3 is proposed
Method, this method include the following steps successively executed:
S11 chooses channel Y, obtains in left cutoff wavelength λ L of band logical, the right cutoff wavelength λ R of band logical and band logical of channel Y
Wavelength X C at section；
Fig. 4 shows the plated film spectral line in the simplified channel lane0, and channel Y is chosen for the channel lane0 and carries out example, is seen
Fig. 4 redefines λ C and λ L and λ R on the plated film spectral line in the channel lane0, and wherein λ L and λ R is respectively the left cut-off of passband
Point and right cut off, λ C is channel center's wavelength as defined in CWDM, DWDM or LWDM communication protocol.
See the step S12 of Fig. 3, calculate responsiveness ResYL that wavelength X L, λ R, λ C respectively generate the channel Y,
ResYR,ResYC；
Channel Y is the channel lane0, when calculating the responsiveness that wavelength X L generates the channel lane0, to the public affairs of light receiving element
Then the corresponding laser of input port input wavelength λ L altogether is read in the channel Lane0 received by PD with ammeter or power meter
Photoelectric current can obtain the photoelectric current divided by the power then with the power of the corresponding laser of power meter measurement wavelength X L
Obtain responsiveness Res0L.The responsiveness calculating process of Res0R, Res0C are similar with Res0L, do not repeat herein.
S13 spends the difference between ResYC and ResYL and/or the difference between responsiveness ResYC and ResYR according to response
It is different, judge the isolation of light receiving element interchannel.
It should be noted that will not be translated by plated film spectral line is influenced since wavelength X C is channel center's wavelength, because
This, spends the responsiveness ResYC that the channel lane0 generates as a reference value using wavelength X C according to response when the translation of plated film spectral line
The size of ratio is between ResYL and responsiveness ResYC come the difference both embodied, accordingly the plated film in the channel diversity judgement lane0
Then spectral line considers the isolation between the channel adjacent thereto of the channel lane0 to the degree of right translation according to the translation degree
Degree, and by control Res0L/Res0C < 1-x%, Res0R/Res0C < 1-x%, by plated film spectral line to the extent control of right translation
In the range of industrial error allows, meet the requirements the isolation between the channel adjacent thereto of the channel lane0；Equally, according to
Ratio between responsiveness ResYR and responsiveness ResYC judges that the plated film spectral line in the channel lane0 to the degree of left, passes through
Control Res0L/Res0C < 1-x%, Res0R/Res0C < 1-x%, thus by extent control from plated film spectral line to left in work
In the range of industry error allows, meet the requirements the isolation between the channel adjacent thereto of the channel lane0.In formula, x is one not solid
Fixed number word is adjusted according to small lot isolation degree test Data Summary, a certain number between generally 5~15.
Thus, it is only necessary to select a certain channel (such as the channel lane0), test 3 wavelength points responsivenesses, so that it may supervise
The interchannel isolation of entire light receiving element is controlled, test method is simple, convenient for operation, can improve production efficiency, is conducive to big
Batch production.
Fig. 5 shows the device of on-line testing light receiving element interchannel isolation according to an embodiment of the invention
Structural schematic diagram.As shown in figure 5, the device of the embodiment of the present invention includes:
Wavelength obtains module 51, is suitable for choosing channel Y, obtains left cutoff wavelength λ L of band logical, the right cut-off of band logical of channel Y
The wavelength X R and wavelength X C of band logical middle section；
Responsiveness computing module 52, the responsiveness that the channel Y is generated respectively suitable for calculating wavelength X L, λ R, λ C
ResYL,ResYR,ResYC；
Isolation degree test module 53, suitable for the difference and/or responsiveness ResYC spent between ResYC and ResYL according to response
Difference between ResYR judges the isolation of light receiving element interchannel.
In another embodiment of the present invention, difference refers specifically to: the ratio between responsiveness ResYL and responsiveness ResYC
Value；And/or the ratio between responsiveness ResYR and responsiveness ResYC.
In another embodiment of the present invention, described device further includes monitoring module, is suitable for: control ResYL/ResYC <
1-x% and ResYR/ResYC < 1-x%, to meet the insulated degree requirement of light receiving element interchannel, x is setting in formula
Value.
In another embodiment of the present invention, the wavelength X C is specifically central wavelength.
The device of the on-line testing light receiving element interchannel isolation of the embodiment of the present invention can be used for executing above-mentioned side
Method embodiment, principle is similar with technical effect, and details are not described herein again.
It should be understood that
Algorithm and display be not inherently related to any certain computer, virtual bench or other equipment provided herein.
Various fexible units can also be used together with teachings based herein.As described above, it constructs required by this kind of device
Structure be obvious.In addition, the present invention is also not directed to any particular programming language.It should be understood that can use various
Programming language realizes summary of the invention described herein, and the description done above to language-specific is to disclose this hair
Bright preferred forms.
In the instructions provided here, numerous specific details are set forth.It is to be appreciated, however, that implementation of the invention
Example can be practiced without these specific details.In some instances, well known method, structure is not been shown in detail
And technology, so as not to obscure the understanding of this specification.
Similarly, it should be understood that in order to simplify the disclosure and help to understand one or more of the various inventive aspects,
Above in the description of exemplary embodiment of the present invention, each feature of the invention is grouped together into single implementation sometimes
In example, figure or descriptions thereof.However, the disclosed method should not be interpreted as reflecting the following intention: i.e. required to protect
Shield the present invention claims features more more than feature expressly recited in each claim.More precisely, as following
Claims reflect as, inventive aspect is all features less than single embodiment disclosed above.Therefore,
Thus the claims for following specific embodiment are expressly incorporated in the specific embodiment, wherein each claim itself
All as a separate embodiment of the present invention.
Those skilled in the art will understand that can be carried out adaptively to the module in the equipment in embodiment
Change and they are arranged in one or more devices different from this embodiment.It can be the module or mould in embodiment
Block or component are combined into a module or module or component, and furthermore they can be divided into multiple submodule or submodule or
Sub-component.Other than such feature and/or at least some of process or module exclude each other, it can use any
Combination is to all features disclosed in this specification (including adjoint claim, abstract and attached drawing) and so disclosed
All processes or module of what method or apparatus are combined.Unless expressly stated otherwise, this specification is (including adjoint power
Benefit require, abstract and attached drawing) disclosed in each feature can carry out generation with an alternative feature that provides the same, equivalent, or similar purpose
It replaces.
In addition, it will be appreciated by those of skill in the art that although some embodiments described herein include other embodiments
In included certain features rather than other feature, but the combination of the feature of different embodiments mean it is of the invention
Within the scope of and form different embodiments.For example, in the following claims, embodiment claimed is appointed
Meaning one of can in any combination mode come using.
Various component embodiments of the invention can be implemented in hardware, or to run on one or more processors
Software module realize, or be implemented in a combination thereof.It will be understood by those of skill in the art that can be used in practice
Microprocessor or digital signal processor (DSP) realize the wearing state of detection electronic equipment according to an embodiment of the present invention
Device in some or all components some or all functions.The present invention is also implemented as executing institute here
Some or all device or device programs of the method for description are (for example, computer program and computer program produce
Product).It is such to realize that program of the invention can store on a computer-readable medium, or can have one or more
The form of signal.Such signal can be downloaded from an internet website to obtain, and perhaps be provided on the carrier signal or to appoint
What other forms provides.
For example, Fig. 6 shows the structural schematic diagram of electronic equipment according to an embodiment of the invention.The electronic equipment passes
It include processor 61 and the memory 62 for being arranged to storage computer executable instructions (program code) on system.Memory 62 can
To be the Electronic saving of such as flash memory, EEPROM (electrically erasable programmable read-only memory), EPROM, hard disk or ROM etc
Device.Memory 62 has the memory space 63 stored for executing the program code 64 of any method and step in embodiment.Example
It such as, may include each journey for being respectively used to realize the various steps in above method for the memory space of program code 63
Sequence code 54.These program codes can read or be written to from one or more computer program product this or
In the multiple computer program products of person.These computer program products include such as hard disk, compact-disc (CD), storage card or soft
The program code carrier of disk etc.Such computer program product is usually computer-readable storage medium described in such as Fig. 7
Matter.The computer readable storage medium can have the memory paragraph of 62 similar arrangement of memory in the electronic equipment with Fig. 6, deposit
Store up space etc..Program code can for example be compressed in a suitable form.In general, memory module is stored with for executing according to this
The program code 71 of the method and step of invention, it can the program code read by such as 61 etc processor, when these journeys
When sequence code is run by electronic equipment, the electronic equipment is caused to execute each step in method described above.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and ability
Field technique personnel can be designed alternative embodiment without departing from the scope of the appended claims.In the claims,
Any reference symbol between parentheses should not be configured to limitations on claims.Word "comprising" does not exclude the presence of not
Element or step listed in the claims.Word "a" or "an" located in front of the element does not exclude the presence of multiple such
Element.The present invention can be by means of including the hardware of several different elements and being come by means of properly programmed computer real
It is existing.If several in these devices can be through the same hardware branch in the module claim for listing equipment for drying
To embody.The use of word first, second, and third does not indicate any sequence.These words can be explained and be run after fame
Claim.
Claims (10)
1. a kind of method of on-line testing light receiving element interchannel isolation, characterized in that including the following step successively executed
It is rapid:
Channel Y is chosen, left cutoff wavelength λ L of band logical, the right cutoff wavelength λ R of band logical and the wave of band logical middle section of channel Y are obtained
Long λ C；
Calculate responsiveness ResYL, ResYR, ResYC that wavelength X L, λ R, λ C respectively generate the channel Y；
The difference between ResYC and ResYL and/or the difference between responsiveness ResYC and ResYR are spent according to response, judge light
The isolation of receiving device interchannel.
2. according to the method described in claim 1, it is characterized in that, difference refers specifically to: responsiveness ResYL and responsiveness ResYC it
Between ratio；And/or the ratio between responsiveness ResYR and responsiveness ResYC.
3. according to the method described in claim 2, it is characterized in that, further includes: control ResYL/ResYC < 1-x% and ResYR/
ResYC < 1-x%, to meet the insulated degree requirement of light receiving element interchannel, x is setting value in formula.
4. according to the method described in claim 3, it is characterized in that, the wavelength X C is specifically central wavelength.
5. a kind of device of on-line testing light receiving element interchannel isolation, characterized in that including successively executing with lower die
Block:
Wavelength obtains module, is suitable for choosing channel Y, obtains left cutoff wavelength λ L of band logical, the right cutoff wavelength λ R of band logical of channel Y
And the wavelength X C of band logical middle section；
Responsiveness computing module, suitable for calculate wavelength X L, λ R, λ C respectively to the channel Y generate responsiveness ResYL,
ResYR,ResYC；
Isolation degree test module, suitable for the difference and/or responsiveness ResYC spent between ResYC and ResYL according to response with
Difference between ResYR judges the isolation of light receiving element interchannel.
6. device according to claim 5, characterized in that the difference refers specifically to: responsiveness ResYL and responsiveness
Ratio between ResYC；And/or the ratio between responsiveness ResYR and responsiveness ResYC.
7. device according to claim 6, characterized in that further include monitoring module, be suitable for: control ResYL/ResYC < 1-
X% and ResYR/ResYC < 1-x%, to meet the insulated degree requirement of light receiving element interchannel, x is setting value in formula.
8. device according to claim 7, characterized in that the wavelength X C is specifically central wavelength.
9. a kind of electronic equipment, wherein the electronic equipment includes:
Processor；And
It is arranged to the memory of storage computer executable instructions, the executable instruction makes the processor when executed
Execute method according to any one of claims 1 to 4.
10. a kind of computer readable storage medium, wherein the computer-readable recording medium storage one or more program,
One or more of programs when being executed by a processor, realize method according to any one of claims 1 to 4.
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| CN201910454534.4A CN110266378B (en) | 2019-05-29 | 2019-05-29 | Method and device for testing isolation between light receiving device channels on line, electronic equipment and computer readable storage medium |
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| CN201910454534.4A CN110266378B (en) | 2019-05-29 | 2019-05-29 | Method and device for testing isolation between light receiving device channels on line, electronic equipment and computer readable storage medium |
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| CN1151520A (en) * | 1996-03-22 | 1997-06-11 | 北京邮电大学 | Optical fibre light isolator property tester |
| CN1307409A (en) * | 2000-01-27 | 2001-08-08 | 华为技术有限公司 | Single-fiber two-way integral optical module for burst reception |
| US9496952B2 (en) * | 2014-05-08 | 2016-11-15 | Calix, Inc. | Rogue optical network interface device detection |
| CN207585890U (en) * | 2017-09-05 | 2018-07-06 | 上海雍邑光电科技有限公司 | A kind of insertion loss of optoisolator sending assembly and the test device of isolation |
| CN109672480A (en) * | 2018-11-02 | 2019-04-23 | 京信通信系统（中国）有限公司 | Method for detecting isolation between, device, access unit, system and storage medium |
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