CN107547134A - A kind of method and device of optical fiber transmission - Google Patents
A kind of method and device of optical fiber transmission Download PDFInfo
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- CN107547134A CN107547134A CN201610505718.5A CN201610505718A CN107547134A CN 107547134 A CN107547134 A CN 107547134A CN 201610505718 A CN201610505718 A CN 201610505718A CN 107547134 A CN107547134 A CN 107547134A
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Abstract
The present invention provides a kind of square law device of optical fiber transmission, including：Detect initial optical signal corresponding current luminous power after amplification, judge whether the current luminous power meets trigger condition, when meeting the trigger condition, judge that current gain is whether in the range of optimum gain corresponding to the current luminous power, if the current gain is in the range of the optimum gain, decay after current luminous power to the etalon optical power, export optical signal corresponding to the etalon optical power, wherein, the etalon optical power is standard value of the initial power after preset gain amplification.So, the optical power value of optical signal and gain in optical fiber transmission can be controlled in real time, and optimal optical power value and gain are arrived with regulation, transmission is stable, and noise is low, and finally the optical signal after amplification is decayed again, meet requirement of the user to optical signal gain value, output result is controllable.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of method and device of optical fiber transmission.
Background technology
With the development of the society, Fibre Optical Communication Technology application increases rapidly, from the commercial installation first of fibre system in 1977
Since, telephone operator begins to substitute old communication systems using fiber link.Optical fiber transmits, i.e., enters by medium of optical fiber
Capable data, signal transmission.Optical fiber, transmission of analogue signal and data signal are not only can be used to, and video can be met
The demand of transmission.Optical fiber is a kind of extremely convenient instrument of transmission signal, wherein one very thin light stamen of cable, it is possible to substitute
The communication line of the entity of more than thousands of, complete a large amount of and long range communication work.
Although optical fiber transmission has the advantages that information capacity is big and transmission speed is fast, caused damage in optical fiber transmitting procedure
Consumption equally causes people more and more to pay close attention to.The loss characteristic of optical fiber transmission is to determine that optical-fiber network transmission range, transmission are stable
One of most important factor of property and reliability.The method for reducing fiber transmission attenuation most common at present is exactly to be transmitted in optical fiber
During the luminous power of optical signal is amplified using fiber amplifier.But what existing fiber amplifier and optical fiber transmitted
Method, the gain of the luminous power for amplifying optical signal can only be pre-set, cause noise during optical signal transmission uncontrollable,
Export unstable.
The content of the invention
The purpose of the embodiment of the present invention is to provide a kind of method of optical fiber transmission, and solving can only preset in optical fiber transmission
For the gain for the luminous power for amplifying optical signal, it is impossible to regulation in real time, cause noise during optical signal transmission uncontrollable, export
The problem of unstable.
In order to achieve the above object, the embodiment of the present invention provides a kind of method of optical fiber transmission, including：
Initial optical signal corresponding current luminous power after amplification is detected, judges whether the current luminous power meets
Trigger condition, wherein, the trigger condition for the current luminous power be more than or equal to optical signal initial light power and it is described just
The summation of the preset gain of beginning luminous power；
When meeting the trigger condition, judge that whether current gain is in optimum gain corresponding to the current luminous power
In the range of, wherein, the optimum gain is that the initial light power is passed when defeated, corresponding gain during transmitted noise minimum
Value；
If the current gain is in the range of the optimum gain, the decay current luminous power to etalon optical power
Afterwards, optical signal corresponding to the etalon optical power is exported, wherein, the etalon optical power is the initial power by described pre-
If the standard value after gain amplification.
The embodiment of the present invention also provides a kind of device of optical fiber transmission, including：
Detection module, for detecting initial optical signal corresponding current luminous power after amplification, judge described current
Whether luminous power meets trigger condition, wherein, the trigger condition is more than or equal to the initial of optical signal for the current luminous power
The summation of the preset gain of luminous power and the initial light power；
Judge module, for when meeting the trigger condition, judging that current gain corresponding to the current luminous power is
It is no in the range of optimum gain, wherein, the optimum gain is that the initial light power is passed when defeated, during transmitted noise minimum
Corresponding yield value；
Output module, if the current gain in the range of the optimum gain, is decayed, the current luminous power is extremely marked
After quasi-optical power, optical signal corresponding to the etalon optical power is exported, wherein, the etalon optical power passes through for the initial power
The standard value crossed after the preset gain amplification.
The embodiment of the present invention also provides a kind of computer-readable storage medium, and computer is stored with the computer-readable storage medium
Executable one or more programs, one or more of programs make the computer perform such as when being performed by the computer
A kind of method of optical fiber transmission of above-mentioned offer.
A technical scheme in above-mentioned technical proposal has the following advantages that or beneficial effect：
The embodiment of the present invention, initial optical signal corresponding current luminous power after amplification is detected, judged described current
Whether luminous power meets trigger condition, wherein, the trigger condition is more than or equal to the initial of optical signal for the current luminous power
The summation of the preset gain of luminous power and the initial light power；When meeting the trigger condition, the current light work(is judged
Current gain corresponding to rate whether in the range of optimum gain, wherein, the optimum gain is that the initial light power is passed and existed
When defeated, corresponding yield value during transmitted noise minimum；The institute if current gain in the range of the optimum gain, is decayed
After stating current luminous power to etalon optical power, optical signal corresponding to the etalon optical power is exported, wherein, the etalon optical power
For standard value of the initial power after preset gain amplification.So, light in optical fiber transmission can be controlled to believe in real time
Number optical power value and gain, optimal optical power value and gain arrive with regulation, stably, noise is low, will finally put again for transmission
Optical signal after big is decayed, and meets requirement of the user to optical signal gain value, output result is controllable.
Brief description of the drawings
Fig. 1 is a kind of flow chart of the method for optical fiber transmission provided in an embodiment of the present invention；
Fig. 2 is the flow chart of the method for another optical fiber transmission provided in an embodiment of the present invention；
Fig. 3 is a kind of structure chart of the device of optical fiber transmission provided in an embodiment of the present invention.
Embodiment
To make the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and tool
Body embodiment is described in detail.
As shown in figure 1, the embodiment of the present invention provides a kind of method of optical fiber transmission, comprise the following steps：
Step S101, initial optical signal corresponding current luminous power after amplification is detected, judges the current light work(
Whether rate meets trigger condition, wherein, the trigger condition is more than or equal to the initial light work(of optical signal for the current luminous power
The summation of the preset gain of rate and the initial light power.
In the step, start fibre-optic transmission system (FOTS) first, initial parameter is set, initial parameter can include the first of optical signal
Beginning luminous power, preset gain and initial current value, optical signal are the signal that fibre-optic transmission system (FOTS) needs to transmit, and initial light power is
User needs the initial strength of the optical signal transmitted, and preset gain and user wish optical signal after fibre-optic transmission system (FOTS) transmits
The exaggerated multiple of optical signal, that is, the multiple that initial light power is exaggerated, initial current value are to swash in fibre-optic transmission system (FOTS)
The initialization electric current of light device, the size of initial current value is required when initial light power is exaggerated through preset gain in theory
Current value corresponding to the light of the laser output of coupling.
Fibre-optic transmission system (FOTS) operating after, initial optical signal by isolator filter interference signal after, by coupler with
The light that laser is sent is coupled, and initial optical signal is exaggerated, the initial optical signal after being exaggerated again by isolator and
Wave filter be adjusted it is backward after transmit, now, detection be exaggerated after by isolator and the initial optical signal of wave filter,
Current luminous power is defined as, the current luminous power is judged, judges whether the current luminous power meets trigger condition.
Wherein, the trigger condition is that the current luminous power is more than or equal to the initial light power of optical signal and the initial light power
The summation of preset gain.
Step S102, when meeting the trigger condition, judge current gain corresponding to the current luminous power whether
In the range of optimum gain, wherein, the optimum gain is that the initial light power is passed when defeated, and institute is right during transmitted noise minimum
The yield value answered.
In the step, when judgement show that the current luminous power meets the trigger condition, that is to say, that when described current
When luminous power is more than or equal to the summation of the initial light power of the optical signal and the preset gain of the initial light power, then carry out
It is further to judge, judge current gain corresponding to the current luminous power after amplification, that is, the initial light work(
Rate obtains the actual gain of the current luminous power by amplification, if in the range of optimum gain.
Because light delivery system inevitably causes to be lost in the transmission, if so initial light power is by pre-
It is if therefore, actual to increase because loss will not typically draw the luminous power that should be exaggerated and draw in theory after the amplification of gain
Benefit can be bigger than preset gain.And the optical signal of different luminous powers can all have when being transmitted in the case of different gains
Different transmitted noises, it is lost to reduce, obtains best laser propagation effect, typically use yield value corresponding to transmitted noise minimum
Best to carry out optical signal transmission, corresponding yield value is commonly referred to as optimum gain during this transmitted noise minimum.
Therefore, in order to obtain best laser propagation effect, transmission loss is submitted, it is necessary to judge corresponding to the current luminous power
Whether current gain is in the range of optimum gain.
If step S103, described current gain in the range of the optimum gain, is decayed, the current luminous power is extremely marked
After quasi-optical power, optical signal corresponding to the etalon optical power is exported, wherein, the etalon optical power passes through for the initial power
The standard value crossed after the preset gain amplification.
In the step, if the current gain is in the range of the optimum gain, that is to say, that fibre-optic transmission system (FOTS) exists
When transmitting optical signal, laser propagation effect is optimal, and loss is minimum.Now, because the current luminous power is the initial light power warp
Cross after the current gain amplifies what is obtained, and the current gain is drawn by system operating, is greater than in general
The preset gain, while the current luminous power is also greater than or equal to the initial light power of optical signal and the initial light
The summation of the preset gain of power, so, the current luminous power is bigger than the luminous power that user expects to obtain.
In order that user obtains expecting the optical signal of luminous power, it is necessary to carry out attenuation processing to the current luminous power, it is
The optical signal of the current luminous power will be exported by an optical attenuator after current optical power attenuation to the etalon optical power.
It is described wherein, etalon optical power is to state initial power theoretical standard value for drawing after preset gain amplification, also
It is the optical power value for the optical signal that user intentionally gets.
The present embodiment, initial optical signal corresponding current luminous power after amplification is detected, judge the current light work(
Whether rate meets trigger condition, wherein, the trigger condition is more than or equal to the initial light work(of optical signal for the current luminous power
The summation of the preset gain of rate and the initial light power；When meeting the trigger condition, the current luminous power pair is judged
The current gain answered whether in the range of optimum gain, wherein, the optimum gain is that the initial light power is passed when defeated,
Corresponding yield value during transmitted noise minimum；If the current gain, in the range of the optimum gain, decay is described to work as
After preceding luminous power to etalon optical power, optical signal corresponding to the etalon optical power is exported, wherein, the etalon optical power is institute
State standard value of the initial power after preset gain amplification.So, optical signal in optical fiber transmission can be controlled in real time
Optical power value and gain, optimal optical power value and gain are arrived with regulation, transmission is stable, and noise is low, after finally amplifying again
Optical signal decayed, meet requirement of the user to optical signal gain value, output result is controllable.
As shown in Fig. 2 the method that the embodiment of the present invention provides another optical fiber transmission, including：
Step S201, initial optical signal corresponding current luminous power after amplification is detected, judges the current light work(
Whether rate meets trigger condition, wherein, the trigger condition is more than or equal to the initial light work(of optical signal for the current luminous power
The summation of the preset gain of rate and the initial light power.
Step S202, when meeting the trigger condition, current gain corresponding to the current luminous power is calculated, its
In, the current gain is the luminous power after the amplification and the difference of the initial light power；
The optimum gain is extracted using presetting method；
Judge whether the current gain and the absolute value of the optimum gain difference are less than pre-determined threshold, if the difference
Absolute value be less than the pre-determined threshold, then judge the current gain in the range of the optimum gain.
Need what is illustrated, step S202 is interchangeable, i.e., step S202 can be understood as in the embodiment shown in Fig. 1
Step S102 restriction, but in the embodiment of the present invention, step S102 is not limited to step S202 embodiment, such as also
By the ratio of the current gain and the optimum gain current gain can be judged whether in the optimum gain
In the range of embodiment realize that i.e. step S201 could alternatively be the ratio by the current gain and the optimum gain
Value come judge the current gain whether the feature in the range of the optimum gain or in replacing with step S101.
In the step, when judgement show that the current luminous power meets the trigger condition, that is to say, that when described current
Luminous power be more than or equal to the optical signal initial light power and the initial light power preset gain summation when, first,
Calculated by preset algorithm, draw current gain corresponding to the current luminous power.Wherein, preset algorithm herein is：
The current gain is the luminous power after the amplification and the difference of the initial light power.
Then, the optimum gain is extracted using presetting method method.It is in gain luminous power noise in present embodiment
Searched in table, search the initial light power corresponding optimal gain values in gain luminous power psophometer are how many.By
The specification of the fiber amplifier used in each fibre-optic transmission system (FOTS) is different, therefore is directed to the fiber amplifier of different size,
Gain luminous power psophometer is also different, in general, and each fiber amplifier has each specific gain luminous power noise
Table.But it is not limited thereto, in other embodiments, the optimum gain can also be calculated by corresponding.
After finding optimum gain, by the current gain compared with the optimum gain, the current increasing is judged
Whether in the orientation of the optimum gain, determination methods are that the current gain and the optimum gain are carried out into subtraction fortune to benefit
Calculate, whether the absolute value for the difference for judging to draw is less than pre-determined threshold, if the absolute value of the difference is less than the pre-determined threshold,
Then judge the current gain in the range of the optimum gain.
Preferably, in present embodiment, the predetermined threshold is 0.5.That is, the current gain with it is described optimal
The absolute value of gain difference is less than 0.5, then judges the current gain in the range of the optimum gain.
If step S203, described current gain in the range of the optimum gain, is decayed, the current luminous power is extremely marked
After quasi-optical power, optical signal corresponding to the etalon optical power is exported, wherein, the etalon optical power passes through for the initial power
The standard value crossed after the preset gain amplification.
Step S201 and step S203 is identical with the step S101 in the first embodiment of the present invention and step S103, herein
Do not repeat.
Optionally, the method for the optical fiber transmission also includes：
If being unsatisfactory for the trigger condition, the initial output current of laser is compensated, to adjust the current light
Power, until after the current luminous power after adjustment meets the trigger condition, then judge whether is current gain after adjustment
In the range of optimum gain.
In present embodiment, this step is implemented between step S201 and step S202.
In the step, when judgement show that the current luminous power is unsatisfactory for the trigger condition, that is to say, that work as when described
Preceding luminous power be less than the optical signal initial light power and the initial light power preset gain summation when, in order that institute
State current power and meet the trigger condition, using the method for compensation, the initial output current of laser is compensated, make just
The luminous power that beginning luminous power obtains with the current coupling after compensation, that is, the current luminous power obtained after being adjusted meet institute
Trigger condition is stated, then carries out judging the current gain after adjustment whether in the range of optimum gain again.
If the current luminous power obtained after compensation initial current is still unsatisfactory for the trigger condition, then carries out again
Compensation, untill the current luminous power meets the trigger condition.
In present embodiment, when compensating the current value of laser, using fixed compensation, i.e., the certain electricity of each fixed compensation
Flow valuve.Because different lasers has different operating currents, so the numerical value of fixed compensation can be according to different and sharp
The light device characteristic of itself carries out specifically compensating numerical value.In other embodiments, other compensation ways can also be used, such as first
Using compared with large compensation numerical value, current compensation is done step-by-step in the method for being then gradually reduced compensation numerical value, until the current light work(
Untill rate meets the trigger condition.
Optionally, the method for the optical fiber transmission also includes：
When the current gain is when in the range of the optimum gain, the current output for monitoring the laser in real time is electric
Stream, wherein, the current output current is the operating current of the laser detected in real time；
Judge the absolute value of the current output current of the laser and the difference of the first threshold electric current of the laser
Whether a pre-determined threshold is less than, wherein, the first threshold electric current meets the triggering bar for the first time for the current luminous power
Part, and the current gain, when in the range of the optimum gain, laser corresponds to the electric current of work；
If the current output current and the difference of the first threshold electric current of the laser are more than the pre-determined threshold,
The current output current is compensated using preset algorithm, to ensure the current gain after adjusting in the optimum gain
In the range of；
If the current output current and the difference of the first threshold electric current of the laser are less than or equal to the pre- gating
Limit, or the current output current and the difference of the first threshold electric current of the laser after being compensated using preset algorithm
Value is less than or equal to the pre-determined threshold, and attenuation processing is carried out to the current luminous power.
In present embodiment, this step is implemented between step S202 and step S203.
In the step, if the current gain is in the range of the optimum gain, that is to say, that fibre-optic transmission system (FOTS) exists
When transmitting optical signal, laser propagation effect is optimal, and loss is minimum.Now, the current output current of the laser is monitored in real time, its
In, the current output current is the operating current of the laser detected in real time.
Monitoring in real time refers to the current output current is periodically monitored and detected, real in present embodiment
When cycle for monitoring can be 1 second 1 time, but be not limited thereto, the cycle monitored in real time can be arranged as required to.
After detection obtains the current output current, in order to prove that laser is stable, outputting current steadily, by laser
The current output current of device judges the current output electricity of the laser compared with the first threshold electric current of the laser
Whether stream and the absolute value of the difference of the first threshold electric current of the laser are less than a pre-determined threshold.Wherein, first threshold
Value electric current meets the trigger condition for the first time for the current luminous power, and the current gain is in the model of the optimum gain
When enclosing interior, the electric current of the corresponding work of laser.
If the current output current and the difference of the first threshold electric current of the laser are more than the pre-determined threshold,
That is the operating current of laser is changed, fibre-optic transmission system (FOTS) is unstable, and the luminous power of the optical signal of output obtains not
Ensure to stable, so needing to compensate the operating current of laser by preset algorithm, make current output current and institute
The difference for stating the first threshold electric current of laser is less than or equal to the pre-determined threshold, to ensure that the current gain after adjusting exists
In the range of the optimum gain.
The preset algorithm can have many kinds, as long as the operating current for the laser that can make to compensate meets requirement i.e.
Can.For example, the preset algorithm can be：I=Id+ (- K1 ∫ (Ipd (n)-Ipd (0))), wherein I are swashing after compensating
The driving current value of light device, Id (n) are the driving current value for detecting laser, and Ipd (n) is corresponding to the luminous power detected
Current value, Ipd (0) are the first threshold electric current, and K1 is integral coefficient, in present embodiment, K1 2.
If the current output current and the difference of the first threshold electric current of the laser are less than or equal to the pre- gating
Limit, then continue executing with next step, attenuation processing is carried out to the current luminous power.In present embodiment, the pre-determined threshold
For 0.005 milliampere, but it is not limited thereto, the pre-determined threshold can also be set as needed.
Optionally, step S203 includes：
When the current gain is when in the range of the optimum gain, the current light of the monitoring after overdamping in real time
Power；
Judge the summation of the initial light power of optical signal and the preset gain of the initial light power and the current light work(
Whether the absolute value of the difference between rate is less than or equal to a pre-set threshold value；
If the summation of the preset gain of the initial light power of optical signal and the initial light power and the current luminous power
Between the absolute value of difference whether be more than the pre-set threshold value, then the operating current of attenuator is mended using preset algorithm
Repay, to ensure the decay current luminous power to etalon optical power；
If the summation of the preset gain of the initial light power of optical signal and the initial light power and the current luminous power
Between the absolute value of difference whether be less than or equal to the pre-set threshold value, then it is assumed that the current luminous power after decay is described
Etalon optical power, export optical signal corresponding to the etalon optical power.
In the step, due to needing to control the luminous power finally exported, meets the needs of user, so needing to output
Luminous power is detected and adjusted, therefore when the current gain is when in the range of the optimum gain, monitoring in real time is passed through
The current luminous power after decay.
Judge the summation of the initial light power of optical signal and the preset gain of the initial light power and the current light work(
Whether the absolute value of the difference between rate is less than or equal to a pre-set threshold value, if the initial light power of optical signal and the initial light work(
The absolute value of difference between the summation of the preset gain of rate and the current luminous power is more than pre-set threshold value, then needs to use one
Preset algorithm is adjusted to the attenuator in fibre-optic transmission system (FOTS), and especially the operating current of attenuator is compensated, and is come
Decay adjustment is carried out to the current luminous power, the current luminous power after adjustment is met the initial light power of optical signal and described
The absolute value of difference between the summation of the preset gain of initial light power and the current luminous power is less than or equal to pre-set threshold value,
To ensure the decay current luminous power to etalon optical power.
The preset algorithm can have many kinds, can be by the current light work(as long as can make the attenuator compensated
Rate decays to etalon optical power.For example, preset algorithm can be：Vset=V+ (- K2 ∫ (C- (A+Pin))), its
In, Vset is the driving voltage of the attenuator after compensation, and V is the driving voltage of the attenuator detected, C be detect it is described
Current luminous power, Pin are the initial light power of optical signal, and A is the preset gain of the initial light power, and K2 is integral coefficient,
In present embodiment, K2 0.1.
If the summation of the preset gain of the initial light power of optical signal and the initial light power and the current luminous power
Between the absolute value of difference be less than or equal to pre-set threshold value, then it is assumed that the current luminous power is the etalon optical power, is not required to
Adjust, directly export optical signal corresponding to the etalon optical power.
In present embodiment, the pre-set threshold value is 0.2dBm, but is not limited thereto, can be with other embodiment
It is arranged as required to.
The present embodiment, initial optical signal corresponding current luminous power after amplification is detected, judge the current light work(
Whether rate meets trigger condition, wherein, the trigger condition is more than or equal to the initial light work(of optical signal for the current luminous power
The summation of the preset gain of rate and the initial light power；Current gain corresponding to the current luminous power is calculated, wherein,
The current gain is the difference of luminous power and the initial light power after the amplification, using described in presetting method extraction most
Excellent gain, judges whether the current gain and the absolute value of the optimum gain difference are less than pre-determined threshold, if the difference
Absolute value be less than the pre-determined threshold, then judge the current gain in the range of the optimum gain；It is if described current
Gain decays after current luminous power to the etalon optical power in the range of the optimum gain, exports the standard light work(
Optical signal corresponding to rate, wherein, the etalon optical power is standard of the initial power after preset gain amplification
Value.So, the optical power value of optical signal and gain in optical fiber transmission can be controlled in real time, and optimal optical power value is arrived with regulation
With gain, transmission is stable, and noise is low, and finally the optical signal after amplification is decayed again, meets user to optical signal gain value
Requirement, output result is controllable.
As shown in figure 3, the embodiment of the present invention provides a kind of device 300 of optical fiber transmission, including：
Detection module 301, for detecting initial optical signal corresponding current luminous power after amplification, judge described work as
Whether preceding luminous power meets trigger condition, wherein, the trigger condition is more than or equal to the first of optical signal for the current luminous power
The summation of the preset gain of beginning luminous power and the initial light power；
Judge module 302, for when meeting the trigger condition, judging current gain corresponding to the current luminous power
Whether in the range of optimum gain, wherein, the optimum gain is that the initial light power is passed when defeated, and transmitted noise is minimum
When corresponding yield value；
Output module 303, if the current gain, in the range of the optimum gain, the decay current luminous power is extremely
After etalon optical power, optical signal corresponding to the etalon optical power is exported, wherein, the etalon optical power is the initial power
Standard value after preset gain amplification.
Optionally, described device 300 also includes：
Compensating module 304, if for being unsatisfactory for the trigger condition, the output current of laser is compensated, to adjust
The whole current luminous power, until after the current luminous power after adjustment meets the trigger condition, then carry out judgement adjustment
Whether the current gain afterwards is in the range of optimum gain.
Optionally, the judge module 302 can be used for when meeting the trigger condition, calculates and adjusts the current increasing
Benefit, wherein, the current gain is the luminous power after the amplification and the difference of the initial light power；
The optimum gain is extracted using presetting method；
Judge whether the current gain and the absolute value of the optimum gain difference are less than pre-determined threshold, if the difference
Absolute value be less than the pre-determined threshold, then judge the current gain in the range of the optimum gain.
Optionally, described device 300 also includes：
First monitoring modular 305, for when the current gain is when in the range of the optimum gain, monitoring institute in real time
The current output current of laser is stated, wherein, the current output current is the operating current of the laser detected in real time；
Judge the absolute value of the current output current of the laser and the difference of the first threshold electric current of the laser
Whether a pre-determined threshold is less than, wherein, the first threshold electric current meets the triggering bar for the first time for the current luminous power
Part, and the current gain, when in the range of the optimum gain, laser corresponds to the electric current of work；
If the current output current and the difference of the first threshold electric current of the laser are more than the pre-determined threshold,
The current output current is compensated using preset algorithm, to ensure the current gain after adjusting in the optimum gain
In the range of；
If the current output current and the difference of the first threshold electric current of the laser are less than or equal to the pre- gating
Limit, or the current output current and the difference of the first threshold electric current of the laser after being compensated using preset algorithm
Value is less than or equal to the pre-determined threshold, and attenuation processing is carried out to the current luminous power.
Optionally, described device 300 also includes：
Second monitoring modular 306, for when the current gain is when in the range of the optimum gain, monitoring in real time to pass through
The current luminous power after overdamping；
Judge the summation of the initial light power of optical signal and the preset gain of the initial light power and the current light work(
Whether the absolute value of the difference between rate is less than or equal to a pre-set threshold value；
If the summation of the preset gain of the initial light power of optical signal and the initial light power and the current luminous power
Between the absolute value of difference whether be more than the pre-set threshold value, then the operating current of attenuator is mended using preset algorithm
Repay, to ensure the decay current luminous power to etalon optical power；
If the summation of the preset gain of the initial light power of optical signal and the initial light power and the current luminous power
Between the absolute value of difference whether be less than or equal to the pre-set threshold value, then it is assumed that the current luminous power after decay is described
Etalon optical power, export optical signal corresponding to the etalon optical power.
The present embodiment, initial optical signal corresponding current luminous power after amplification is detected, judge the current light work(
Whether rate meets trigger condition, wherein, the trigger condition is more than or equal to the initial light work(of optical signal for the current luminous power
The summation of the preset gain of rate and the initial light power；When meeting the trigger condition, the current luminous power pair is judged
The current gain answered whether in the range of optimum gain, wherein, the optimum gain is that the initial light power is passed when defeated,
Corresponding yield value during transmitted noise minimum；If the current gain, in the range of the optimum gain, decay is described to work as
After preceding luminous power to etalon optical power, optical signal corresponding to the etalon optical power is exported, wherein, the etalon optical power is institute
State standard value of the initial power after preset gain amplification.So, optical signal in optical fiber transmission can be controlled in real time
Optical power value and gain, optimal optical power value and gain are arrived with regulation, transmission is stable, and noise is low, after finally amplifying again
Optical signal decayed, meet requirement of the user to optical signal gain value, output result is controllable.
One of ordinary skill in the art will appreciate that all or part of step for realizing above-described embodiment method is can be with
Completed by the related hardware of programmed instruction, described program can be stored in a computer-readable medium, the program
Upon execution, comprise the following steps：
Initial optical signal corresponding current luminous power after amplification is detected, judges whether the current luminous power meets
Trigger condition, wherein, the trigger condition for the current luminous power be more than or equal to optical signal initial light power and it is described just
The summation of the preset gain of beginning luminous power；
When meeting the trigger condition, judge that whether current gain is in optimum gain corresponding to the current luminous power
In the range of, wherein, the optimum gain is that the initial light power is passed when defeated, corresponding gain during transmitted noise minimum
Value；
If the current gain is in the range of the optimum gain, the decay current luminous power to etalon optical power
Afterwards, optical signal corresponding to the etalon optical power is exported, wherein, the etalon optical power is the initial power by described pre-
If the standard value after gain amplification.
Optionally, methods described also includes：
If being unsatisfactory for the trigger condition, the initial output current of laser is compensated, to adjust the current light
Power, until after the current luminous power after adjustment meets the trigger condition, then judge whether is current gain after adjustment
In the range of optimum gain.
Optionally, it is described when meeting the trigger condition, judge the current gain whether optimum gain scope
Interior step, including：
When meeting the trigger condition, the current gain is calculated, wherein, the current gain is the amplification
Luminous power afterwards and the difference of the initial light power；
The optimum gain is extracted using presetting method；
Judge whether the current gain and the absolute value of the optimum gain difference are less than pre-determined threshold, if the difference
Absolute value be less than the pre-determined threshold, then judge the current gain in the range of the optimum gain.
Optionally, methods described can include：
When the current gain is when in the range of the optimum gain, the current output for monitoring the laser in real time is electric
Stream, wherein, the current output current is the operating current of the laser detected in real time；
Judge the absolute value of the current output current of the laser and the difference of the first threshold electric current of the laser
Whether a pre-determined threshold is less than, wherein, the first threshold electric current meets the triggering bar for the first time for the current luminous power
Part, and the current gain, when in the range of the optimum gain, laser corresponds to the electric current of work；
If the current output current and the difference of the first threshold electric current of the laser are more than the pre-determined threshold,
The current output current is compensated using preset algorithm, to ensure the current gain after adjusting in the optimum gain
In the range of；
If the current output current and the difference of the first threshold electric current of the laser are less than or equal to the pre- gating
Limit, or the current output current and the difference of the first threshold electric current of the laser after being compensated using preset algorithm
Value is less than or equal to the pre-determined threshold, and attenuation processing is carried out to the current luminous power.
Optionally, if the current gain is in the range of the optimum gain, the current luminous power is decayed extremely
After etalon optical power, the step of exporting optical signal corresponding to the etalon optical power, in addition to：
When the current gain is when in the range of the optimum gain, the current light of the monitoring after overdamping in real time
Power；
Judge the summation of the initial light power of optical signal and the preset gain of the initial light power and the current light work(
Whether the absolute value of the difference between rate is less than or equal to a pre-set threshold value；
If the summation of the preset gain of the initial light power of optical signal and the initial light power and the current luminous power
Between the absolute value of difference whether be more than the pre-set threshold value, then the operating current of attenuator is mended using preset algorithm
Repay, to ensure the decay current luminous power to etalon optical power；
If the summation of the preset gain of the initial light power of optical signal and the initial light power and the current luminous power
Between the absolute value of difference whether be less than or equal to the pre-set threshold value, then it is assumed that the current luminous power after decay is described
Etalon optical power, export optical signal corresponding to the etalon optical power.
Described storage medium, such as read-only storage (Read-Only Memory, abbreviation ROM), random access memory
(Random Access Memory, abbreviation RAM), magnetic disc or CD etc..
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
- A kind of 1. method of optical fiber transmission, it is characterised in that including：Initial optical signal corresponding current luminous power after amplification is detected, judges whether the current luminous power meets to trigger Condition, wherein, the trigger condition is more than or equal to the initial light power of optical signal and the initial light for the current luminous power The summation of the preset gain of power；When meeting the trigger condition, judge current gain corresponding to the current luminous power whether optimum gain scope It is interior, wherein, the optimum gain is that the initial light power is passed when defeated, corresponding yield value during transmitted noise minimum；If the current gain in the range of the optimum gain, is decayed after current luminous power to the etalon optical power, defeated Go out optical signal corresponding to the etalon optical power, wherein, the etalon optical power is that the initial power passes through the default increasing Standard value after benefit amplification.
- 2. the method as described in claim 1, it is characterised in that methods described also includes：If being unsatisfactory for the trigger condition, the initial output current of laser is compensated, to adjust the current luminous power, Until after the current luminous power after adjustment meets the trigger condition, then judge current gain after adjustment whether optimal In the range of gain.
- 3. the method as described in claim 1, it is characterised in that it is described when meeting the trigger condition, judge described current Gain whether in the range of optimum gain the step of, including：When meeting the trigger condition, the current gain is calculated, wherein, the current gain is after the amplification Luminous power and the difference of the initial light power；The optimum gain is extracted using presetting method；Judge whether the current gain and the absolute value of the optimum gain difference are less than pre-determined threshold, if the difference is exhausted The pre-determined threshold is less than to value, then judges the current gain in the range of the optimum gain.
- 4. method as claimed in claim 2, it is characterised in that methods described also includes：When the current gain is when in the range of the optimum gain, the current output current of the laser is monitored in real time, Wherein, the current output current is the operating current of the laser detected in real time；Judge the current output current of the laser and the difference of the first threshold electric current of the laser absolute value whether Less than a pre-determined threshold, wherein, the first threshold electric current meets the trigger condition for the first time for the current luminous power, and The current gain is when in the range of the optimum gain, the electric current of the corresponding work of laser；If the current output current and the difference of the first threshold electric current of the laser are more than the pre-determined threshold, use Preset algorithm compensates to the current output current, to ensure scope of the current gain after adjusting in the optimum gain It is interior；If the current output current and the difference of the first threshold electric current of the laser are less than or equal to the pre-determined threshold, or The current output current and the difference of the first threshold electric current of the laser after person is compensated using preset algorithm is small In equal to the pre-determined threshold, attenuation processing is carried out to the current luminous power.
- 5. the method as described in claim 1, it is characterised in that if the current gain is in the scope of the optimum gain It is interior, after current luminous power to the etalon optical power of decaying, the step of exporting optical signal corresponding to the etalon optical power, also wrap Include：When the current gain is when in the range of the optimum gain, the current light work(of the monitoring in real time after overdamping Rate；Judge the initial light power of optical signal and the preset gain of the initial light power summation and the current luminous power it Between the absolute value of difference whether be less than or equal to a pre-set threshold value；If between the summation of the preset gain of the initial light power of optical signal and the initial light power and the current luminous power The absolute value of difference whether be more than the pre-set threshold value, then the operating current of attenuator is compensated using preset algorithm, To ensure the decay current luminous power to etalon optical power；If between the summation of the preset gain of the initial light power of optical signal and the initial light power and the current luminous power The absolute value of difference whether be less than or equal to the pre-set threshold value, then it is assumed that the current luminous power after decay is the standard Luminous power, export optical signal corresponding to the etalon optical power.
- A kind of 6. device of optical fiber transmission, it is characterised in that including：Detection module, for detecting initial optical signal corresponding current luminous power after amplification, judge the current light work( Whether rate meets trigger condition, wherein, the trigger condition is more than or equal to the initial light work(of optical signal for the current luminous power The summation of the preset gain of rate and the initial light power；Judge module, for when meeting the trigger condition, judge current gain corresponding to the current luminous power whether In the range of optimum gain, wherein, the optimum gain is that the initial light power is passed when defeated, and institute is right during transmitted noise minimum The yield value answered；Output module, if the current gain in the range of the optimum gain, is decayed, the current luminous power is to standard light After power, optical signal corresponding to the etalon optical power is exported, wherein, the etalon optical power passes through institute for the initial power State the standard value after preset gain amplification.
- 7. device as claimed in claim 6, it is characterised in that described device also includes compensating module, if for being unsatisfactory for State trigger condition, the output current of laser compensated, to adjust the current luminous power, until adjustment after it is described work as After preceding luminous power meets the trigger condition, then judge the current gain after adjustment whether optimum gain scope It is interior.
- 8. device as claimed in claim 7, it is characterised in that the judge module, which is additionally operable to work as, meets the trigger condition When, calculate and adjust the current gain, wherein, the current gain is the luminous power and the initial light power after the amplification Difference；The optimum gain is extracted using presetting method；Judge whether the current gain and the absolute value of the optimum gain difference are less than pre-determined threshold, if the difference is exhausted The pre-determined threshold is less than to value, then judges the current gain in the range of the optimum gain.
- 9. device as claimed in claim 7, it is characterised in that described device also includes the first monitoring modular, for when described Current gain monitors the current output current of the laser in real time when in the range of the optimum gain, wherein, it is described to work as Preceding output current is the operating current of the laser detected in real time；Judge the current output current of the laser and the difference of the first threshold electric current of the laser absolute value whether Less than a pre-determined threshold, wherein, the first threshold electric current meets the trigger condition for the first time for the current luminous power, and The current gain is when in the range of the optimum gain, the electric current of the corresponding work of laser；If the current output current and the difference of the first threshold electric current of the laser are more than the pre-determined threshold, use Preset algorithm compensates to the current output current, to ensure scope of the current gain after adjusting in the optimum gain It is interior；If the current output current and the difference of the first threshold electric current of the laser are less than or equal to the pre-determined threshold, or The current output current and the difference of the first threshold electric current of the laser after person is compensated using preset algorithm is small In equal to the pre-determined threshold, attenuation processing is carried out to the current luminous power.
- 10. device as claimed in claim 6, it is characterised in that described device also includes the second monitoring modular, for when described Current gain monitors the current luminous power after overdamping in real time when in the range of the optimum gain；Judge the initial light power of optical signal and the preset gain of the initial light power summation and the current luminous power it Between the absolute value of difference whether be less than or equal to a pre-set threshold value；If between the summation of the preset gain of the initial light power of optical signal and the initial light power and the current luminous power The absolute value of difference whether be more than the pre-set threshold value, then the operating current of attenuator is compensated using preset algorithm, To ensure the decay current luminous power to etalon optical power；If between the summation of the preset gain of the initial light power of optical signal and the initial light power and the current luminous power The absolute value of difference whether be less than or equal to the pre-set threshold value, then it is assumed that the current luminous power after decay is the standard Luminous power, export optical signal corresponding to the etalon optical power.
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