CN110233702A - A kind of signal transmission method and optical mode block system based on optical module - Google Patents
A kind of signal transmission method and optical mode block system based on optical module Download PDFInfo
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- CN110233702A CN110233702A CN201910448270.1A CN201910448270A CN110233702A CN 110233702 A CN110233702 A CN 110233702A CN 201910448270 A CN201910448270 A CN 201910448270A CN 110233702 A CN110233702 A CN 110233702A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 258
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000008054 signal transmission Effects 0.000 title claims abstract description 28
- 230000011664 signaling Effects 0.000 claims abstract description 91
- 230000005540 biological transmission Effects 0.000 claims abstract description 35
- 239000000835 fiber Substances 0.000 claims abstract description 7
- 230000003760 hair shine Effects 0.000 claims description 28
- 239000013307 optical fiber Substances 0.000 claims description 21
- 230000005611 electricity Effects 0.000 claims description 9
- 238000005538 encapsulation Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
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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
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2589—Bidirectional transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
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Abstract
The present invention provides a kind of signal transmission method based on optical module and optical mode block system, method includes: that the first main control module of the first optical module receives the first signaling to be sent；First main control module is modulated according to first signaling to enable signal is sent；First transmitter is transmitted through the fiber to the second receiver of the second optical module according to the transmission enable signal luminous and extinguishing after the first signaling modulation, luminous optical signal；Second receiver of the second optical module generates the first optical signal and loses indication signal according to the timing of the first transmitter luminous and extinguishing；Second main control module of the second optical module is lost indication signal to first optical signal and is parsed, and first signaling is obtained；In the case that the encapsulation and hardware for not changing optical module form, realizes the reliable transmission of signaling, using the mode of duplex communication, solve the problems, such as that signaling cannot be transmitted between two optical modules, method is simple and reliable, and production cost is effectively reduced.
Description
Technical field
The present invention relates to optical module technical field more particularly to a kind of signal transmission methods and optical module based on optical module
System.
Background technique
Deliver various signals in network, a portion is user's needs, such as the voice made a phone call, the number of online
According to packet etc., another part is not user's direct requirement, for the control signal controlled relevant device, this kind letter
Number be referred to as signaling.
Only service channel between current conventional optical module, transmitting business stream, such as the data of online etc., and some
It is also required to do some interactions, for example negotiate wavelength, coding mode etc. between optical module under scene, this requires energy between optical module
Signalling path is enough provided, currently used mode is to increase corresponding hardware composition, this makes optical module structure complicated, increases life
Produce cost.
Summary of the invention
It is an object of the invention to the optical module structure complexity for above-mentioned transmission signaling in the prior art, production costs
High problem proposes a kind of signal transmission method based on optical module and optical mode block system, can be effectively reduced production cost.
A kind of signal transmission method based on optical module, comprising:
First main control module of the first optical module receives the first signaling to be sent；
First main control module is modulated according to first signaling to enable signal is sent；
For first transmitter according to the transmission enable signal luminous and extinguishing after the first signaling modulation, the optical signal that shines is logical
Cross the second receiver that optical fiber is transmitted to the second optical module；
Second receiver of the second optical module generates the first optical signal and loses according to the timing of the first transmitter luminous and extinguishing
Lose indication signal；
Second main control module of the second optical module is lost indication signal to first optical signal and is parsed, described in acquisition
First signaling.
Further, the first transmitter is according to the transmission enable signal luminous and extinguishing after the first signaling modulation, comprising:
It shines when receiving low level, extinguishing when receiving high level；Alternatively,
It shines when receiving high level, extinguishing when receiving low level.
Further, the second receiver of the second optical module is according to the timing of the first transmitter luminous and extinguishing, generates the
One optical signal loses indication signal, comprising:
Low level is generated when receiving optical signal, then generates high level when being not received by optical signal；Alternatively,
High level is generated when receiving optical signal, then generates low level when being not received by optical signal.
Further, the method also includes:
Second main control module of the second optical module receives the second signaling to be sent；
Second main control module is modulated according to second signaling to enable signal is sent；
For second transmitter according to the transmission enable signal luminous and extinguishing after the second signaling modulation, the optical signal that shines is logical
Cross the first receiver that optical fiber is transmitted to the first optical module；
First receiver of the first optical module generates the second optical signal and loses according to the timing of the second transmitter luminous and extinguishing
Lose indication signal；
First main control module of the first optical module is lost indication signal to second optical signal and is parsed, described in acquisition
Second signaling.
Further, the second transmitter is according to the transmission enable signal luminous and extinguishing after the second signaling modulation, comprising:
It shines when receiving low level, extinguishing when receiving high level；Alternatively,
It shines when receiving high level, extinguishing when receiving low level.
Further, the first receiver of the first optical module is according to the timing of the second transmitter luminous and extinguishing, generates the
Two optical signals lose indication signal, comprising:
Low level is generated when receiving optical signal, then generates high level when being not received by optical signal；Alternatively,
High level is generated when receiving optical signal, then generates low level when being not received by optical signal.
A kind of optical mode block system, including the first optical module and the second optical module；
First optical module includes the first main control module, the first transmitter and the first receiver, the first master control mould
Block is connect with first transmitter and first receiver；
Second optical module includes the second main control module, the second transmitter and the second receiver, the second master control mould
Block is connect with second transmitter and second receiver；
First transmitter is connect by optical fiber with second receiver, and second transmitter passes through the second optical fiber
It is connect with first receiver；
First main control module enables transmission for receiving the first signaling to be sent, and according to first signaling
Signal is modulated；
First transmitter is used for according to the transmission enable signal luminous and extinguishing after the first signaling modulation；
First optical fiber is used to receive when the first transmitter shines by the second of optical signal transmission to the second optical module
Machine；
Second receiver is used for the timing according to the first transmitter luminous and extinguishing, generates the first optical signal loss and refers to
Show signal；
Second main control module is used to lose indication signal to first optical signal and parse, and obtains described first
Signaling.
Further, first transmitter is used to shine when receiving low level, extinguishing when receiving high level；Or
Person shines when receiving high level, extinguishing when receiving low level；
Second receiver is also used to generate low level when receiving optical signal, is not received by optical signal Shi Zesheng
At high level；High level is generated when alternatively, receiving optical signal, then generates low level when being not received by optical signal.
Further, second main control module is also used to receive the second signaling to be sent, and according to second letter
It enables and transmission enable signal is modulated；
Second transmitter is used for according to the transmission enable signal luminous and extinguishing after the second signaling modulation；
The optical fiber is also used to the first receiver of optical signal transmission to the first optical module when the second transmitter shines；
First receiver is used for the timing according to the second transmitter luminous and extinguishing, generates the second optical signal loss and refers to
Show signal；
First main control module is also used to lose indication signal to second optical signal and parse, and obtains second letter
It enables.
Further, second transmitter is used to shine when receiving low level, extinguishing when receiving high level；Or
Person shines when receiving high level, extinguishing when receiving low level；
First receiver is also used to generate low level when receiving optical signal, is not received by optical signal Shi Zesheng
At high level；High level is generated when alternatively, receiving optical signal, then generates low level when being not received by optical signal.
Signal transmission method and optical mode block system provided by the invention based on optical module is based on existing optical module, root
It is modulated according to signaling to be sent to commonly sending enable signal in optical module, instruction letter is lost using optical signal in receiving end
Number demodulation, do not change optical module encapsulation and hardware form in the case where, the reliable transmission of signaling is realized, using duplex communication
Mode solves the problems, such as that signaling cannot be transmitted between two optical modules, and method is simple and reliable, and production cost is effectively reduced.
Detailed description of the invention
Fig. 1 is a kind of flow chart of embodiment of the signal transmission method provided by the invention based on optical module.
Fig. 2 is a kind of structural schematic diagram of embodiment of optical mode block system provided by the invention.
Fig. 3 is the flow chart of the signal transmission method another kind embodiment provided by the invention based on optical module.
Fig. 4 is a kind of schematic diagram of application scenarios of the signal transmission method provided by the invention based on optical module.
Specific embodiment
To make the purpose of the present invention, technical solution and effect clearer, clear and definite, right as follows in conjunction with drawings and embodiments
The present invention is further described.It should be appreciated that described herein, specific examples are only used to explain the present invention, is not used to
Limit the present invention.
Embodiment one
With reference to Fig. 1 and Fig. 2, the present embodiment provides a kind of signal transmission methods based on optical module, are applied to the first optical mode
Block 100 is by the first signalling to the second optical module 200, which comprises
The first main control module 101 of step S101, the first optical module 100 receive the first signaling to be sent；
Step S102, the first main control module 101 are modulated according to first signaling to enable signal is sent；
Step S103, the first transmitter 102 is according to the transmission enable signal luminous and extinguishing after the first signaling modulation, hair
Light time optical signal is transmitted through the fiber to the second receiver 203 of the second optical module 200；
Step S104, the second receiver 203 of the second optical module 200 according to the timing of the first transmitter luminous and extinguishing,
It generates the first optical signal and loses indication signal；
Step S105, the second main control module 201 of the second optical module 200 to first optical signal lose indication signal into
Row parsing, obtains first signaling.
Specifically, step S101 is executed, the first main control module 101 of the first optical module 100 receives to be sent the of user
One signaling.
Further, execute step S102, the first main control module 101 according to first signaling to send enable signal into
Row modulation.
It sends enable signal (TX_DIS, transmit disable), to control the signal sent, according to the first signaling pair
It sends enable signal to be modulated, change so that sending enable signal with the rule of the first signaling, it is modulated to send enabled letter
Number being includes high level and low level digital signal.
Further, step S103 is executed, the first transmitter 102 is according to the transmission enable signal after the first signaling modulation
Luminous and extinguishing.
As an alternative embodiment, the first transmitter 102 shines when receiving low level, when receiving high level
Extinguish, optical signal when shining is transmitted through the fiber to the second receiver 203 of the second optical module 200, and the first transmitter 102 is then
By it is bright, go out in a manner of by the first signalling to the second receiver 203.
Alternatively optional embodiment, the first transmitter 102 shine when receiving high level, receive low electricity
Usually extinguish.
Further, step S104, timing of second receiver 203 according to the first transmitter luminous and extinguishing, life are executed
Indication signal is lost at the first optical signal, it includes high level and low level number letter that the first optical signal, which loses indication signal to be,
Number.
It is that whether there is or not the instructions of optical signal as receiver for optical module that optical signal, which loses (loss of signal) indication signal,.
As an alternative embodiment, receiving high electricity if the first transmitter 102 shines when receiving low level
Usually extinguish, the second receiver 203 generates low level when receiving optical signal, and high electricity is then generated when being not received by optical signal
It is flat, then it can directly obtain low and high level timing and consistent first optical signal of modulated transmission enable signal loses instruction letter
Number.Second receiver 203 generates high level when also can receive optical signal, generates low level when being not received by optical signal, after
Continuous second main control module 201 is lost indication signal to the first optical signal and is negated.
Alternatively optional embodiment receives if the first transmitter 102 shines when receiving high level
Extinguish when low level, the second receiver 203 generates high level when receiving optical signal, and low electricity is generated when being not received by optical signal
It is flat, then it can directly obtain low and high level timing and consistent first optical signal of modulated transmission enable signal loses instruction letter
Number.Second receiver 203 generates low level when also can receive optical signal, generates high level when being not received by optical signal, after
Continuous second main control module is lost indication signal to the first optical signal and is negated.
Further, execute step S105, the second main control module 201 to first optical signal lose indication signal according to
Preset rules are parsed, and first signaling is obtained.
Signal transmission method provided in this embodiment based on optical module, wavelength is negotiated, is encoded between can be applied to optical module
Mode selects scenes such as (NRZ/PAM4).
Signal transmission method provided in this embodiment based on optical module is based on existing optical module, according to be sent
Signaling is modulated to commonly sending enable signal in optical module, and indication signal demodulation is lost using optical signal in receiving end, no
In the case that the encapsulation and hardware for changing optical module form, realizes the reliable transmission of signaling, solve to pass between two optical modules
The problem of defeated signaling, method is simple and reliable, and production cost is effectively reduced.
Embodiment two
Referring to figs. 2 and 3, the present embodiment provides a kind of signal transmission methods based on optical module, are applied to the second optical mode
Block 200 is by the second signalling to the first optical module 100, which comprises
The second main control module 201 of step S201, the second optical module 200 receive the second signaling to be sent；
Step S202, the second main control module 201 are modulated according to second signaling to enable signal is sent；
Step S203, the second transmitter 202 is according to the transmission enable signal luminous and extinguishing after the second signaling modulation, hair
Light time optical signal is transmitted through the fiber to the first receiver 103 of the first optical module 100；
Step S204, the first receiver 103 of the first optical module 100 according to the timing of the second transmitter luminous and extinguishing,
It generates the second optical signal and loses indication signal；
Step S205, the first main control module 101 of the first optical module 100 to second optical signal lose indication signal into
Row parsing, obtains second signaling.
Specifically, step S201 is executed, the second main control module 201 of the second optical module 200 receives to be sent the of user
Two signalings.
Further, step S202 is executed, the second main control module 201 is carried out according to second signaling to enable signal is sent
Modulation.It is modulated according to the second signaling to enable signal is sent, is changed so that sending enable signal with the rule of the second signaling,
Modulated transmission enable signal be include high level and low level digital signal.
Further, step S203 is executed, the second transmitter 202 is according to the transmission enable signal after the second signaling modulation
Luminous and extinguishing.
As an alternative embodiment, the second transmitter 202 shines when receiving low level, when receiving high level
Extinguish, optical signal when shining is transmitted through the fiber to the first receiver 103 of the first optical module 100, and the second transmitter 202 is then
By it is bright, go out in a manner of by the second signalling to the first receiver 103.
Alternatively optional embodiment, the second transmitter 202 shine when receiving high level, receive low electricity
Usually extinguish.
Further, step S204, timing of first receiver 203 according to the second transmitter luminous and extinguishing, life are executed
Indication signal is lost at the second optical signal, it includes high level and low level number letter that the second optical signal, which loses indication signal to be,
Number.
As an alternative embodiment, receiving high electricity if the second transmitter 202 shines when receiving low level
Usually extinguish, the first receiver 103 generates low level when receiving optical signal, and high electricity is then generated when being not received by optical signal
It is flat, then it can directly obtain low and high level timing and consistent second optical signal of modulated transmission enable signal loses instruction letter
Number.First receiver 103 generates high level when also can receive optical signal, generates low level when being not received by optical signal, after
Continuous first main control module 101 is lost indication signal to the second optical signal and is negated.
Alternatively optional embodiment receives if the second transmitter 202 shines when receiving high level
Extinguish when low level, the first receiver 103 generates high level when receiving optical signal, and low electricity is generated when being not received by optical signal
It is flat, then it can directly obtain low and high level timing and consistent second optical signal of modulated transmission enable signal loses instruction letter
Number.First receiver 103 generates low level when also can receive optical signal, generates high level when being not received by optical signal, after
Continuous first main control module is lost indication signal to the second optical signal and is negated.
Further, execute step S205, the first main control module 101 to second optical signal lose indication signal according to
Preset rules are parsed, and second signaling is obtained.
Signal transmission method provided in this embodiment based on optical module is based on existing optical module, according to be sent
Signaling is modulated to commonly sending enable signal in optical module, and indication signal demodulation is lost using optical signal in receiving end, no
In the case that the encapsulation and hardware for changing optical module form, the reliable transmission of signaling is realized, using the mode of duplex communication, solve
The problem of signaling cannot be transmitted between two optical modules, method is simple and reliable, and production cost is effectively reduced.
Embodiment three
With reference to Fig. 2, the present embodiment provides a kind of optical mode block systems, including the first optical module 100 and the second optical module 200；
First optical module 100 includes the first main control module 101, the first transmitter 102 and the first receiver 103, and first is main
Control module 101 is connect with the first transmitter 102 and the first receiver 103；
Second optical module 200 includes the second main control module 201, the second transmitter 202 and the second receiver 203, and second is main
Control module 201 is connect with the second transmitter 202 and the second receiver 203；
First transmitter 102 is connect by optical fiber with the second receiver 203, and the second transmitter 202 passes through optical fiber and first
Receiver 103 connects；
First main control module 101 enables transmission for receiving the first signaling to be sent, and according to first signaling
Signal is modulated；
First transmitter 102 is used for according to the transmission enable signal luminous and extinguishing after the first signaling modulation；
Optical fiber is used for optical signal transmission to the second receiver of the second optical module 200 when the first transmitter 102 shines
203；
Second receiver 203 is used for the timing according to the first transmitter luminous and extinguishing, generates the first optical signal loss and refers to
Show signal；
Second main control module 201 is used to lose indication signal to first optical signal and parse, and obtains described first
Signaling.
As a preferred embodiment, the first optical module 100 is connected with the second optical module 200 by an optical fiber,
Applied to bidi optical module.
Alternatively preferred embodiment, the first optical module 100 and the second optical module 200 are connected by two optical fiber
It connects, the first transmitter 102 is connected with the second receiver 203 by the first optical fiber, and the optical signal that the first transmitter 102 issues passes through
First optical fiber is transmitted to the second receiver, and the second transmitter 202 is connected with the first receiver 103 by the second optical fiber, the second hair
The optical signal for penetrating the sending of machine 202 is sent to the first receiver 103 by the second optical fiber.
Further, the first transmitter 102 is used to shine when receiving low level, extinguishing when receiving high level；Or
Person shines when receiving high level, extinguishing when receiving low level；
Second receiver 203 is also used to generate low level when receiving optical signal, is not received by optical signal Shi Zesheng
At high level；High level is generated when alternatively, receiving optical signal, then generates low level when being not received by optical signal.
The principle that first optical module 100 sends the first signaling to the second optical module 200 please refers to embodiment one, herein no longer
It repeats.
Further, the second main control module 201 is also used to receive the second signaling to be sent, and according to second signaling
It is modulated to enable signal is sent；
Second transmitter 202 is used for according to the transmission enable signal luminous and extinguishing after the second signaling modulation；
Optical fiber is used for optical signal transmission to the first receiver of the first optical module 100 when the second transmitter 202 shines
103；
First receiver 103 is used for the timing according to the second transmitter luminous and extinguishing, generates the second optical signal loss and refers to
Show signal；
First main control module 101 is also used to lose indication signal to second optical signal and parse, and obtains described the
Two signalings.
Further, the second transmitter 202 is used to shine when receiving low level, extinguishing when receiving high level；Or
Person shines when receiving high level, extinguishing when receiving low level；
First receiver 103 is also used to generate low level when receiving optical signal, is not received by optical signal Shi Zesheng
At high level；High level is generated when alternatively, receiving optical signal, then generates low level when being not received by optical signal.
The principle that second optical module 200 sends the second signaling to the first optical module 100 please refers to embodiment two, herein no longer
It repeats.
Optical mode block system provided in this embodiment, structure is simple, can be realized the reliable transmission of signaling, using duplex communication
Mode, solve the problems, such as that signaling cannot be transmitted between two optical modules, method is simple and reliable, and production cost is effectively reduced.
Example IV
The present embodiment does into one the signal transmission method provided by the invention based on optical module with specific application scenarios
Walk explanation.
With reference to Fig. 2 and Fig. 4, signaling " 0x5a " is sent to the second optical module 200 by the first optical module 100, and specific steps are such as
Under:
First main control module 101 of the first optical module 100 receives signaling to be sent " 0x5a "；
First main control module 101 is modulated according to the signaling " 0x5a " to enable signal is sent, and modulated transmission makes
Energy signal is " 01011010 "；
Send enable signal " 01011010 " drives the first transmitter 102 to shine and put out in a serial fashion (MSB is preceding)
It goes out, high level " 1 " Shi Faguang, when low level " 0 " does not shine, and the optical signal that shines is transmitted to the second optical module by the first optical fiber
200 the second receiver 203；
Second receiver 203 of the second optical module 200 generates high level " 1 " when receiving optical signal, is not received by light
Low level " 0 " is generated when signal, the first optical signal is obtained and loses indication signal " 01011010 "；
Second main control module 201 of the second optical module 200 loses indication signal " 01011010 " to first optical signal
It is parsed, obtains the signaling " 0x5a ".
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (10)
1. a kind of signal transmission method based on optical module characterized by comprising
First main control module of the first optical module receives the first signaling to be sent；
First main control module is modulated according to first signaling to enable signal is sent；
First transmitter passes through light according to the transmission enable signal luminous and extinguishing after the first signaling modulation, luminous optical signal
Fibre is transmitted to the second receiver of the second optical module；
Second receiver of the second optical module generates the first optical signal loss and refers to according to the timing of the first transmitter luminous and extinguishing
Show signal；
Second main control module of the second optical module is lost indication signal to first optical signal and is parsed, and obtains described first
Signaling.
2. the signal transmission method according to claim 1 based on optical module, which is characterized in that the first transmitter is according to warp
Transmission enable signal luminous and extinguishing after first signaling modulation, comprising:
It shines when receiving low level, extinguishing when receiving high level；Alternatively,
It shines when receiving high level, extinguishing when receiving low level.
3. the signal transmission method according to claim 2 based on optical module, which is characterized in that the second of the second optical module
Receiver generates the first optical signal and loses indication signal according to the timing of the first transmitter luminous and extinguishing, comprising:
Low level is generated when receiving optical signal, then generates high level when being not received by optical signal；Alternatively,
High level is generated when receiving optical signal, then generates low level when being not received by optical signal.
4. the signal transmission method according to claim 1 based on optical module, which is characterized in that the method also includes:
Second main control module of the second optical module receives the second signaling to be sent；
Second main control module is modulated according to second signaling to enable signal is sent；
Second transmitter passes through light according to the transmission enable signal luminous and extinguishing after the second signaling modulation, luminous optical signal
Fibre is transmitted to the first receiver of the first optical module；
First receiver of the first optical module generates the second optical signal loss and refers to according to the timing of the second transmitter luminous and extinguishing
Show signal；
First main control module of the first optical module is lost indication signal to second optical signal and is parsed, and obtains described second
Signaling.
5. the signal transmission method according to claim 4 based on optical module, which is characterized in that the second transmitter is according to warp
Transmission enable signal luminous and extinguishing after second signaling modulation, comprising:
It shines when receiving low level, extinguishing when receiving high level；Alternatively,
It shines when receiving high level, extinguishing when receiving low level.
6. the signal transmission method according to claim 5 based on optical module, which is characterized in that the first of the first optical module
Receiver generates the second optical signal and loses indication signal according to the timing of the second transmitter luminous and extinguishing, comprising:
Low level is generated when receiving optical signal, then generates high level when being not received by optical signal；Alternatively,
High level is generated when receiving optical signal, then generates low level when being not received by optical signal.
7. a kind of optical mode block system, which is characterized in that including the first optical module and the second optical module；
First optical module include the first main control module, the first transmitter and the first receiver, first main control module with
First transmitter is connected with first receiver；
Second optical module include the second main control module, the second transmitter and the second receiver, second main control module with
Second transmitter is connected with second receiver；
First transmitter connect by optical fiber with second receiver, and second transmitter passes through optical fiber and described the
The connection of one receiver；
First main control module is used to receive the first signaling to be sent, and according to first signaling to transmission enable signal
It is modulated；
First transmitter is used for according to the transmission enable signal luminous and extinguishing after the first signaling modulation；
The optical fiber is used for the second receiver of optical signal transmission to the second optical module when the first transmitter shines；
Second receiver is used for the timing according to the first transmitter luminous and extinguishing, generates the first optical signal and loses instruction letter
Number；
Second main control module is used to lose indication signal to first optical signal and parse, and obtains first letter
It enables.
8. optical mode block system according to claim 7, which is characterized in that first transmitter, which is used to work as, receives low electricity
Usually shine, extinguishing when receiving high level；Alternatively, shine when receiving high level, extinguishing when receiving low level；
Second receiver is also used to generate low level when receiving optical signal, then generates height when being not received by optical signal
Level；High level is generated when alternatively, receiving optical signal, then generates low level when being not received by optical signal.
9. optical mode block system according to claim 7, which is characterized in that second main control module is also used to receive pending
The second signaling sent, and be modulated according to second signaling to enable signal is sent；
Second transmitter is used for according to the transmission enable signal luminous and extinguishing after the second signaling modulation；
The optical fiber is also used to the first receiver of optical signal transmission to the first optical module when the second transmitter shines；
First receiver is used for the timing according to the second transmitter luminous and extinguishing, generates the second optical signal and loses instruction letter
Number；
First main control module is also used to lose indication signal to second optical signal and parse, and obtains second signaling.
10. optical mode block system according to claim 9, which is characterized in that second transmitter is used for low when receiving
It shines when level, extinguishing when receiving high level；Alternatively, shine when receiving high level, extinguishing when receiving low level；
First receiver is also used to generate low level when receiving optical signal, then generates height when being not received by optical signal
Level；High level is generated when alternatively, receiving optical signal, then generates low level when being not received by optical signal.
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