CN106918390B - A kind of receiving end optical power control system for optical fiber vibration sensing - Google Patents
A kind of receiving end optical power control system for optical fiber vibration sensing Download PDFInfo
- Publication number
- CN106918390B CN106918390B CN201710254542.5A CN201710254542A CN106918390B CN 106918390 B CN106918390 B CN 106918390B CN 201710254542 A CN201710254542 A CN 201710254542A CN 106918390 B CN106918390 B CN 106918390B
- Authority
- CN
- China
- Prior art keywords
- optical
- optical power
- light
- receiving end
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
- G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/042—Electrical excitation ; Circuits therefor
- H01S5/0427—Electrical excitation ; Circuits therefor for applying modulation to the laser
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/0607—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying physical parameters other than the potential of the electrodes, e.g. by an electric or magnetic field, mechanical deformation, pressure, light, temperature
- H01S5/0614—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying physical parameters other than the potential of the electrodes, e.g. by an electric or magnetic field, mechanical deformation, pressure, light, temperature controlled by electric field, i.e. whereby an additional electric field is used to tune the bandgap, e.g. using the Stark-effect
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a kind of receiving end optical power control systems for optical fiber vibration sensing, the light exit side mouth of light source is connected by vibrating sensing optical fiber with optical splitter, second light splitting branch of optical splitter is connected with optical detector optical path, light signal strength is converted to light intensity analog electrical signal by optical detector, amplifier is for amplifying light intensity analog electrical signal, amplified light intensity analog electrical signal is converted to the digital signal for being used to indicate light intensity by analog-digital converter, threshold determination device is used to judge whether the digital signal for indicating light intensity to be lower than and presets normal optical power threshold, if it is increase output and adjust number；The adjusting number is converted into analog signal by optical power adjustment module；Drive circuit module adjusts the driving current intensity of light source according to analog signal to adjust the Output optical power of light source.The system that the present invention provides a kind of can to obtain metastable received optical power at optical detector end in inexpensive vibration sensing system.
Description
Technical field
The invention belongs to technical field of optical fiber sensing, more particularly, to a kind of receiving end for optical fiber vibration sensing
Optical power control system.
Background technique
In general optical fiber vibration sensing system, the general design using fixed emergent light optical power.Gone out using fixed
Penetrating light optical power can guarantee that light source output power is stablized.But during the installation and deployment of optical fiber vibration sensing system, pass
The length of photosensitive fibre different coupled mode and sensor fibre, the damage that all optical signal can be caused different degrees of in optical fiber link
Consumption.It is even emitted the identical two unjacketed optical fibers vibrating sensing equipment of optical power in this way, in different installation and deployment environment
Also identical incident (reception) optical power is hardly resulted in.
Received optical power is an important references amount for being used to detect whether vibration occurs in optical fiber vibration sensing system.This
One reference quantity, which changes, may cause various problems: 1, optical power is greater than optical detector investigative range or optical power and visits lower than light
Survey device investigative range；2, optical power changes the vibration detection result influenced in same vibration detecting system；3, optical power is not
It is same that different fiber-optic vibration detection systems is made to be likely to be obtained inconsistent vibration detection result.
In order to meet remote sensing demand, these optical fiber vibration sensing systems often use biggish optical power, and
The optical power loss in different installation environments is adapted to using casacade multi-amplifier in optical detector rear end.But in some low cost opticals
In fiber sensor system, the cost of multistage amplifier unit is excessively high.So a kind of relatively easy method is needed to make inexpensive vibration
Sensor-based system can obtain metastable received optical power at optical detector end.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the present invention provides a kind of connecing for optical fiber vibration sensing
Receiving end optical power control system, its purpose is to provide one kind can obtain in inexpensive vibration sensing system in optical signal receiving end
Thus the system for obtaining metastable received optical power solves not visiting in light in inexpensive vibration sensing system in the prior art
Survey the technical issues of device end obtains metastable received optical power.
To achieve the above object, the present invention provides a kind of receiving end optical power control systems for optical fiber vibration sensing
System, including light source, optical splitter, optical detector, amplifier, analog-digital converter, first threshold judging device, optical power adjustment module with
And drive circuit module, in which:
The light exit side mouth of the light source is connected by vibrating sensing optical fiber with optical splitter；
The optical splitter is used to the emergent light of the light source being at least divided into two light splitting branches, wherein the optical splitter
First light splitting branch is connected with optical fiber vibration sensing detector optical path, the second light splitting branch of the optical splitter and the optical detection
Device optical path is connected；
The output of the optical detector is connected with the input of the amplifier, and the optical detector is for detecting described second
It is divided the light signal strength of branch, and the light signal strength is converted into light intensity analog electrical signal；
The output of the amplifier is connected with the input of the analog-digital converter, and the amplifier is for amplifying the light intensity
Analog electrical signal is in the voltage strength of amplified light intensity analog electrical signal within the scope of the voltage measurement of analog-digital converter；
The output of the analog-digital converter is connected with the input of the first threshold judging device, and the analog-digital converter is used for
The amplified light intensity analog electrical signal is converted to the digital signal for being used to indicate light intensity；
The output of the first threshold judging device is connected with the input of the optical power adjustment module, and the first threshold is sentenced
Determine device for judge it is described preset normal optical power threshold for indicating whether the digital signal of light intensity is lower than, if it is increase
Output adjusts number；
The output of the optical power adjustment module is connected with the drive circuit module, and the optical power adjustment module is used for
The adjusting number is converted into analog signal；
The output of the drive circuit module is connected with the light source, and the drive circuit module is used for according to the simulation
Signal adjusts the driving current intensity of the light source to adjust the Output optical power of light source.
In one embodiment of the present of invention, the optical power control system further includes driving current monitoring modular and the second threshold
It is worth judging device, wherein the input of the driving current monitoring modular is connected with the output of the drive circuit module, the driving
The output of current monitoring module is connected with second threshold judging device；The driving current monitoring modular is for obtaining the driving electricity
The driving current of road module output, the second threshold judging device are used to judge the driving current of the drive circuit module output
Whether the nominal drive current of the light source is greater than, and the output for if it is reducing the second threshold judging device adjusts number.
In one embodiment of the present of invention, during driving current rises, the first threshold judging device is also used to
The preceding receiving end optical power of stored adjustment before regulating optical power, and receiving end optical power after adjusting is obtained after adjustment, and is sentenced
Whether receiving end optical power after the adjusting of breaking, which is less than, adjusts preceding receiving end optical power, if it is reduces the first threshold and sentences
The output for determining device adjusts number.
In one embodiment of the present of invention, the first threshold judging device is in the light intensity value received lower than given threshold
Start optical power adjustment when preset ratio.
In one embodiment of the present of invention, the optical power adjustment module is digital regulation resistance, or number sliding variable resistance
Device or digital analog converter.
In one embodiment of the present of invention, the optical splitter is the optical splitter of one-to-two.
In one embodiment of the present of invention, the light splitting ratio of the optical splitter is 90%:10%, and 10% accesses optical detection
Device optical path, another 90% incoming fiber optic vibrating sensing detector optical path.
In one embodiment of the present of invention, the light source be FP laser perhaps Distributed Feedback Laser or LED light source with rise
The combination of inclined device.
In one embodiment of the present of invention, the optical power control system further includes memory module, the memory module with
The first threshold judging device communication connection, for storing the preceding receiving end optical power of adjusting.
In one embodiment of the present of invention, the preset ratio of the starting optical power adjustment is 30%.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, have following beneficial to effect
Fruit:
(1) it provided by the present invention for the receiving end optical power control system of optical fiber vibration sensing, is visited by optical detector
The intensity for the optical signal that light source issues is surveyed, and judges whether the light intensity is lower than default Intensity threshold by threshold decision device, such as
Fruit is to increase output to adjust number, and the driving current of light source is adjusted by optical power adjustment module and drive circuit module, with
The emergent light optical power for increasing light source, to guarantee the relatively stable of receiving end optical power；The optical power control system structure letter
It is single, it is low in cost；It can be used for low-cost optical fiber vibration sensing system to calibrate received optical power；And optical power intensity can be reduced
Variation negatively affected to fiber-optic vibration detection accuracy and consistency bring；One kind is provided in inexpensive vibration sensing system
In in optical signal receiving end obtain the scheme of metastable received optical power；
(2) it provided by the present invention for the receiving end optical power control system of optical fiber vibration sensing, is supervised by driving current
The driving current for surveying module monitors light source passes through optical power adjusting when the driving current of light source is more than its running current upper limit
Section module and drive circuit module adjust back the driving current of light source, that is, reduce the driving current of light source；So as to protect
The drive current adjustment of shield light source does not exceed the running current upper limit of light source, not yet connects completion in sensor fibre link
Or prevent light source working state labile or the lost of life from even scrapping under other egregious cases；
(3) provided by the present invention for the receiving end optical power control system of optical fiber vibration sensing, driving current is being promoted
During, the received optical power before being promoted by record driving current, received optical power after driving current is promoted with mention
Rise before received optical power compare, determine driving current promoted operation whether rollback；Temperature can be reduced, effect is promoted to driving current
The negative effect of fruit；
(4) provided by the present invention for the receiving end optical power control system of optical fiber vibration sensing, in optical power lower than just
Start step-by-step movement optical power adjustment program when ordinary light function, actively sluggish stepped intervals times when step-by-step adjustment optical power, thus
The frequency for reducing power adjustment avoids the noise that frequently adjustment optical power introduces.Stepping small simultaneously ensure that power tune
The whole precision to normal optical power；
(5) provided by the present invention for the receiving end optical power control system of optical fiber vibration sensing, in the light intensity received
Value starts optical power adjustment when being lower than the preset ratio of given threshold, can adjust to avoid frequent starting and cause optical power fluctuation.
Detailed description of the invention
Fig. 1 is that a kind of structure of the receiving end optical power control system for optical fiber vibration sensing is shown in the embodiment of the present invention
It is intended to；
Fig. 2 is the structure of another receiving end optical power control system for optical fiber vibration sensing in the embodiment of the present invention
Schematic diagram；
Fig. 3 is the structure of another receiving end optical power control system for optical fiber vibration sensing in the embodiment of the present invention
Schematic diagram；
Fig. 4 is the circuit knot of a kind of drive circuit module in the embodiment of the present invention, driving current monitoring modular and light source
Structure schematic diagram.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
As shown in Figure 1, for a kind of receiving end optical power control system for optical fiber vibration sensing in the embodiment of the present invention
Structural schematic diagram, including light source, optical splitter, optical detector, amplifier, analog-digital converter, first threshold judging device, optical power
Adjustment module and drive circuit module, in which:
The light exit side mouth of the light source is connected by vibrating sensing optical fiber with optical splitter；Specifically, the light source can be with
Select FP (Fabry-P é rot, Fabry Perot) laser or DFB (Distributed Feedback Laser, distribution
Formula feedback laser) laser or LED light source (Light Emitting Diode, light emitting diode) and the polarizer group
It closes.
The optical splitter is used to the emergent light of the light source being at least divided into two light splitting branches, wherein the optical splitter
First light splitting branch is connected with optical fiber vibration sensing detector optical path, the second light splitting branch of the optical splitter and the optical detection
Device optical path is connected；Specifically, emergent light can be divided into two parts or more parts by the optical splitter, it is usually preferred to the light splitting of one-to-two
Device；The optical splitter can be the optical splitter of arbitrary proportion, it is only necessary to which the emergent light of light source is divided into two.Such as it is divided
Ratio can be 50:50, be also possible to 90:10.It is preferred that 90:10, and 10% access optical detector optical path, another 90% incoming fiber optic
Vibrating sensing detector optical path, for realizing the sensing detection of fiber-optic vibration by the variation of detection light intensity.
The output of the optical detector is connected with the input of the amplifier, and the optical detector is for detecting described second
It is divided the light signal strength of branch, and the light signal strength is converted into light intensity analog electrical signal.
The output of the amplifier is connected with the input of the analog-digital converter, and the amplifier is for amplifying the light intensity
Analog electrical signal is in the voltage strength of amplified light intensity analog electrical signal within the scope of the voltage measurement of analog-digital converter.
The output of the analog-digital converter is connected with the input of the first threshold judging device, and the analog-digital converter is used for
The amplified light intensity analog electrical signal is converted to the digital signal for being used to indicate light intensity.
The output of the first threshold judging device is connected with the input of the optical power adjustment module, and the first threshold is sentenced
Determine device for judge it is described preset normal optical power threshold for indicating whether the digital signal of light intensity is lower than, if it is increase
Output adjusts number, to increase light source optical power.Specifically, if the digital signal for indicating light intensity is lower than default
Normal optical power threshold, then the adjusting number of the first threshold judging device output increases T；The T is according to degree of regulation and tune
It saves step-length to determine, such as can be 1, or 2, or other values；In adjustment process, the T is also possible to become
Change, for example, when it is described for indicate the digital signal of light intensity lower than preset normal optical power threshold it is more when, the T can take
It is worth slightly larger (i.e. adjusting step-length is larger), when the digital signal for indicating light intensity is more close to normal optical power threshold is preset
When, the T can be smaller with value, makes entire adjustment process first quick and back slow, also can guarantee tune under the premise of guaranteeing adjustment speed
Precision is saved, is unlikely to so that certain adjusted result is too many beyond normal optical power threshold is preset；
Further, because Fibre Optical Sensor link optical power totally present attenuation trend, and in short-term from the point of view of optical power phase
To more stable.So optical power adjustment is to adjust to more bloom power direction.To avoid frequent starting adjusting from causing optical power
It fluctuates, the threshold value for starting optical power adjustment in implementation is 30%, i.e., the light intensity value that first threshold judging device receives is lower than setting
The 30% of threshold value just starts optical power adjustment.After starting optical power adjustment, first threshold judging device constantly determines that optical power has not
Have and be greater than given threshold (such as value is 300mW), if not then increases first threshold with step-length 1 (or other asserting values)
The adjusting numeral output of judging device.Optical power is greater than 300mW and stops this optical power adjustment.
The output of the optical power adjustment module is connected with the drive circuit module, and the optical power adjustment module is used for
The adjusting number is converted into analog signal；Wherein, the optical power adjustment module can be there are three types of implementation: number electricity
Position device, perhaps digital slide rheostat or digital analog converter (Digital to Analog Converter, DAC), make
With the driving voltage or driving current (usual and specification mode) to modify drive circuit module, mode is by electric to driving
Road module provides variable voltage or resistance.Wherein digital regulation resistance can both provide resistance or provide voltage, and number is sliding
Dynamic rheostat can only provide resistance, and DAC can only provide voltage.
The output of the drive circuit module is connected with the light source, and the drive circuit module is used for according to the simulation
The voltage or current strength of light source described in Signal Regulation are to adjust the Output optical power of light source.Driving to drive circuit module
Can be there are two types of implementation: voltage driving or electric current driving (usual and specification mode), main function be provide it is higher
Driving capability.Light source by electric current or can pass through voltage regulating optical power.Optical power adjustment is from nominal power to minimum
The corresponding optical power of threshold current, power regulation ratio is up to 90 percent.In addition, substantially can be with to the power regulation of light source
Regard linear as, but resolution limitations are in the bit wide of digital regulation resistance, digital slide rheostat or DAC.
Further, in the optical power adjustment scheme of some simulations, the driving current of light source can only be adjusted, but
Being limited to detectability not can determine that whether driving current exceeds the nominal drive current of light source, may cause the damage of light source.
To achieve the goals above, as shown in Fig. 2, being additionally provided in another embodiment of the present invention a kind of for fiber-optic vibration
The receiving end optical power control system of sensing increases driving current monitoring modular and second on the basis of system shown in Fig. 2
The input of threshold determination device, the driving current monitoring modular is connected with the output of the drive circuit module, the driving electricity
The output of stream monitoring modular is connected with second threshold judging device；The driving current monitoring modular is for obtaining the driving circuit
The driving current of module output, the second threshold judging device are used to judge that the driving current of the drive circuit module output to be
The no nominal drive current greater than the light source, if the driving current of drive circuit module output is greater than the light source
Nominal drive current then needs to reduce the driving current of the drive circuit module output, specifically can be by reducing described second
The output of threshold determination device adjusts number, to reduce the driving electricity of the drive circuit module by optical power adjustment module
Stream.
It should be noted that the first threshold judging device and second threshold judging device are functionally to be divided into two moulds
Block, specifically in implementation process, the first threshold judging device and second threshold judging device physically can be for can be simultaneously
The entity module that implementation Intensity threshold determines and current threshold determines, or realize Intensity threshold judgement and electricity respectively
Flow two entity modules of threshold determination.
In addition, light source can generate heat in the process of work, since the limitation of radiating condition might have the accumulation of thermal energy.Just
It is the influence due to temperature factor, only positive relationship is presented within the scope of certain temperature in the power and driving current of light source.?
In some heat dissipation constrained environments, when driving current rises to some value, light source power may be begun to decline.To guarantee light source function
The validity that rate is adjusted, needs to detect this special variation, and take the callback operation of driving current.This function is
Simulated light power conditioning circuitry cannot achieve.
To achieve the goals above, driving current rise during, can before regulating optical power stored adjustment
Preceding receiving end optical power, and receiving end optical power after adjusting is obtained after adjustment, if receiving end optical power is less than tune after adjusting
Preceding receiving end optical power is saved, then it is believed that the power of light source and driving current have come into the section of negative sense relationship, is needed
Callback operation is carried out to driving current, the output that can reduce the first threshold judging device at this time adjusts number, to pass through light
Power conditioning module reduces the driving current of the drive circuit module.Specifically, a memory module can be set to store
Described to adjust preceding receiving end optical power, which can be individual physical memory cell, be also possible to be integrated in described
Storage unit in first threshold judging device.
Further, as shown in figure 3, for the receiving end light function for being used for optical fiber vibration sensing another in the embodiment of the present invention
The structural schematic diagram of rate control system, the optical power control system of the optical fiber vibration sensing are mainly used for the vibration inspection of dual-polarization state
It surveys.In embodiments of the present invention, optical splitter uses the one-to-two optical splitter of 10:90, and optical power adjustment module is using number sliding
Rheostat, light source use FP laser, in which: light source power >=500 microwatts, threshold current 7.5mA ± 0.6mA, output power
300 microwatts, amplifier amplify about 10000 times, and analog-digital converter bit wide 12bit, digital slide rheostat inputs bit wide 8.It drives
Dynamic circuit module adjusts light source optical power with voltage.Light source uses the FP laser of 1550nm wavelength, the sensitivity of optical detector
For 0.98 ± 0.02mA/mW.
Further, as shown in figure 4, for drive circuit module a kind of in the embodiment of the present invention, driving current monitoring modular
And the electrical block diagram of light source, the implementation of the circuit structure are, collector and the light source phase of a NPN triode
Even, the emitter of NPN triode is grounded by first resistor, and the base stage of NPN triode passes through second resistance and optical power adjustment
Module is connected；NPN triode, first resistor and second resistance collectively constitute the drive circuit module in this circuit structure；Driving
Current monitoring module is connected with the emitter of NPN triode；In the embodiment of the present invention, the power supply can use light-emitting diodes
Pipe, anode meet the power supply of 3.3V, threshold current 8mA；The NPN triode can select C8050, the first resistor
Resistance value is 50 Ω, and second resistance is adjustable.Driving current monitoring modular can be by described in acquisition current value or voltage value judgement
Whether the driving current of light source is more than nominal threshold value circuit.
In addition, further as shown in Figure 1, optical power digital reference amount can also be obtained at the analog-digital converter,
It is used for other function module.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (9)
1. a kind of receiving end optical power control system for optical fiber vibration sensing, which is characterized in that including light source, optical splitter,
Optical detector, amplifier, analog-digital converter, first threshold judging device, optical power adjustment module and drive circuit module,
In:
The light exit side mouth of the light source is connected by vibrating sensing optical fiber with optical splitter；
The optical splitter is used to the emergent light of the light source being at least divided into two light splitting branches, wherein the first of the optical splitter
Light splitting branch is connected with optical fiber vibration sensing detector optical path, the second light splitting branch of the optical splitter and the optical detector light
Road is connected；
The output of the optical detector is connected with the input of the amplifier, and the optical detector is for detecting second light splitting
The light signal strength of branch, and the light signal strength is converted into light intensity analog electrical signal；
The output of the amplifier is connected with the input of the analog-digital converter, and the amplifier is for amplifying the light intensity simulation
Electric signal is in the voltage strength of amplified light intensity analog electrical signal within the scope of the voltage measurement of analog-digital converter；
The output of the analog-digital converter is connected with the input of the first threshold judging device, and the analog-digital converter is used for institute
It states amplified light intensity analog electrical signal and is converted to digital signal for indicating light intensity；
The output of the first threshold judging device is connected with the input of the optical power adjustment module, the first threshold judging device
Normal optical power threshold is preset for judging whether the digital signal for indicating light intensity is lower than, if it is increases output
Adjust number；During driving current rises, the first threshold judging device is also used to store before regulating optical power
Preceding receiving end optical power is adjusted, and obtains receiving end optical power after adjusting after adjustment, and judge receiving end light after the adjusting
Whether power, which is less than, adjusts preceding receiving end optical power, if it is reduce the first threshold judging device output adjust number with
Cancel optical power adjustment operation；
The output of the optical power adjustment module is connected with the drive circuit module, and the optical power adjustment module is used for institute
It states adjusting number and is converted into analog signal；
The output of the drive circuit module is connected with the light source, and the drive circuit module is used for according to the analog signal
To adjust the driving current intensity of the light source to adjust the Output optical power of light source.
2. being used for the receiving end optical power control system of optical fiber vibration sensing as described in claim 1, which is characterized in that also wrap
Include driving current monitoring modular and second threshold judging device, wherein the input and the driving of the driving current monitoring modular
The output of circuit module is connected, and the output of the driving current monitoring modular is connected with second threshold judging device；The driving electricity
Stream monitoring modular is used to obtain the driving current of the drive circuit module output, and the second threshold judging device is for judging institute
Whether the driving current for stating drive circuit module output is greater than the nominal drive current of the light source, if it is reduces described the
The output of two threshold determination devices adjusts number.
3. being used for the receiving end optical power control system of optical fiber vibration sensing as claimed in claim 1 or 2, which is characterized in that
The first threshold judging device starts optical power adjustment when the light intensity value received is lower than the preset ratio of given threshold.
4. being used for the receiving end optical power control system of optical fiber vibration sensing as claimed in claim 1 or 2, which is characterized in that
The optical power adjustment module is digital regulation resistance, perhaps digital slide rheostat or digital analog converter.
5. being used for the receiving end optical power control system of optical fiber vibration sensing as claimed in claim 1 or 2, which is characterized in that
The optical splitter is the optical splitter of one-to-two.
6. being used for the receiving end optical power control system of optical fiber vibration sensing as claimed in claim 5, which is characterized in that described
The light splitting ratio of optical splitter is 90%:10%, and 10% access optical detector optical path, another 90% incoming fiber optic vibrating sensing detect
Device optical path.
7. being used for the receiving end optical power control system of optical fiber vibration sensing as claimed in claim 1 or 2, which is characterized in that
The light source is the combination of FP laser perhaps Distributed Feedback Laser or LED light source and the polarizer.
8. being used for the receiving end optical power control system of optical fiber vibration sensing as described in claim 1, which is characterized in that also wrap
Memory module is included, the memory module and the first threshold judging device communicate to connect, for storing the preceding receiving end of adjusting
Optical power.
9. being used for the receiving end optical power control system of optical fiber vibration sensing as claimed in claim 3, which is characterized in that described
Preset ratio is 30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710254542.5A CN106918390B (en) | 2017-04-18 | 2017-04-18 | A kind of receiving end optical power control system for optical fiber vibration sensing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710254542.5A CN106918390B (en) | 2017-04-18 | 2017-04-18 | A kind of receiving end optical power control system for optical fiber vibration sensing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106918390A CN106918390A (en) | 2017-07-04 |
| CN106918390B true CN106918390B (en) | 2019-09-20 |
Family
ID=59567373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710254542.5A Active CN106918390B (en) | 2017-04-18 | 2017-04-18 | A kind of receiving end optical power control system for optical fiber vibration sensing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106918390B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107870003B (en) * | 2017-10-19 | 2020-11-10 | 昆山金鸣光电科技有限公司 | Optical fiber sensing optical module |
| CN108489915A (en) * | 2018-02-13 | 2018-09-04 | 中国海洋石油集团有限公司 | A kind of fluid measurement optical system |
| CN109374576B (en) * | 2018-12-24 | 2023-10-03 | 河北大学 | Near infrared receiving and transmitting control device with adjustable transmitting power |
| CN110031779B (en) * | 2019-03-18 | 2020-09-25 | 郑州工程技术学院 | Electric automobile lithium cell power failure detection device |
| CN110460387A (en) * | 2019-07-24 | 2019-11-15 | 深圳市深光谷科技有限公司 | A kind of coherent receiver, optical communication system and light signal detection method |
| CN110631804B (en) * | 2019-08-21 | 2022-06-07 | 大族激光科技产业集团股份有限公司 | Automatic testing method and device for optical fiber laser |
| CN112312103A (en) * | 2020-10-21 | 2021-02-02 | 华域视觉科技(上海)有限公司 | Laser projection feedback adjustment system and method and vehicle |
| CN112629643A (en) * | 2020-12-11 | 2021-04-09 | 无锡科晟光子科技有限公司 | Optical fiber vibration detection system capable of automatically adjusting optical power based on MSE algorithm |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1524327A (en) * | 2001-07-06 | 2004-08-25 | 英特尔公司 | Tunable laser control system |
| US7400661B2 (en) * | 2006-11-08 | 2008-07-15 | Lexmark International, Inc. | Automatic setting of laser diode bias current |
| CN101834660A (en) * | 2010-04-15 | 2010-09-15 | 中兴通讯股份有限公司 | Control device and method for optical module and light emitting device |
| CN201608720U (en) * | 2009-12-25 | 2010-10-13 | 上海霍普光通信有限公司 | Variable structure control equipment for multimode clad pumping high-power fiber optic amplifier |
| CN203193119U (en) * | 2013-04-15 | 2013-09-11 | 深圳新飞通光电子技术有限公司 | Automatic power control circuit and optical transceiver module comprising the automatic power control circuit |
| CN104568121A (en) * | 2015-01-14 | 2015-04-29 | 东南大学 | Method and device for comprehensively controlling parameters of high-adaptability optical fiber vibration sensing system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100385756C (en) * | 2006-05-19 | 2008-04-30 | 北京航空航天大学 | Stable light source light power output apparatus with full optical fiber structure |
| CN104615054A (en) * | 2015-01-22 | 2015-05-13 | 北京奥普维尔科技有限公司 | System and method for power invariability of laser |
-
2017
- 2017-04-18 CN CN201710254542.5A patent/CN106918390B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1524327A (en) * | 2001-07-06 | 2004-08-25 | 英特尔公司 | Tunable laser control system |
| US7400661B2 (en) * | 2006-11-08 | 2008-07-15 | Lexmark International, Inc. | Automatic setting of laser diode bias current |
| CN201608720U (en) * | 2009-12-25 | 2010-10-13 | 上海霍普光通信有限公司 | Variable structure control equipment for multimode clad pumping high-power fiber optic amplifier |
| CN101834660A (en) * | 2010-04-15 | 2010-09-15 | 中兴通讯股份有限公司 | Control device and method for optical module and light emitting device |
| CN203193119U (en) * | 2013-04-15 | 2013-09-11 | 深圳新飞通光电子技术有限公司 | Automatic power control circuit and optical transceiver module comprising the automatic power control circuit |
| CN104568121A (en) * | 2015-01-14 | 2015-04-29 | 东南大学 | Method and device for comprehensively controlling parameters of high-adaptability optical fiber vibration sensing system |
Non-Patent Citations (1)
| Title |
|---|
| 一种光输出功率控制电路;伍翔等;《光通信研究》;20000131(第1期);第37-41页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106918390A (en) | 2017-07-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106918390B (en) | A kind of receiving end optical power control system for optical fiber vibration sensing | |
| CN106656347B (en) | It is a kind of for controlling the method and device of light emission component wavelength | |
| US7386020B2 (en) | Systems, devices and methods for temperature-based control of laser performance | |
| US6967320B2 (en) | Methods for maintaining laser performance at extreme temperatures | |
| US7639952B2 (en) | Calculation of laser slope efficiency in an optical transceiver module | |
| EP1483774A2 (en) | Avalanche photodiode controller circuit for fiber optics transceiver | |
| US7826739B2 (en) | Determination and adjustment of laser modulation current in an optical transmitter | |
| US8837934B2 (en) | Monitoring circuitry for optical transceivers | |
| JPH09162811A (en) | Characteristic information generating method for semiconductor device mount module, optical transmitter and laser diode, and optical transmitter | |
| US10693276B2 (en) | Optical transmitter | |
| CN104049193B (en) | Avalanche photodide detector system | |
| JP2006013252A (en) | Method and circuit for controlling laser diode, and optical transmitter | |
| JP4986407B2 (en) | LASER MODULE, ITS CONTROL METHOD, CONTROL DATA GENERATION METHOD FOR CONTROL, AND CONTROL DATA | |
| CN108983860B (en) | Current self-checking regulating circuit based on voltage calibration | |
| WO2016065228A1 (en) | Method for approximating remaining lifetime of active devices | |
| CN113113842B (en) | Optical module wavelength control method, device and storage medium | |
| CN104298277A (en) | Automatic temperature control system of semiconductor laser | |
| US7954358B2 (en) | Laser driver bias current calibration | |
| CN204143275U (en) | Semiconductor laser automatic temperature-adjusting control system | |
| CN106908138A (en) | A kind of light power control method and device for optical fiber vibration sensing | |
| CN111198299A (en) | On-site collection type optical fiber type current measuring device | |
| EP1485736B1 (en) | Maintaining desirable performance of optical emitters at extreme temperatures | |
| CN104300360A (en) | Device and method for improving wavelength stability of superluminescent diode light source | |
| US20050180711A1 (en) | Dual loop automatic power control of optical transmitters | |
| CN217738994U (en) | Laser methane sensor and gas monitoring facilities |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200102 Address after: 518000 building 7, Saige Technology Industrial Park, Huaqiang North Street, HUAFA North Road, Futian District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Saige Property Management Co., Ltd Address before: 215311. Xueyuan Road, Jiangsu, Kunshan, Suzhou, No. 88 Patentee before: KUNSHAN JINMING PHOTOELECTRIC SCIENCE & TECHNOLOGY CO., LTD. |
|
| TR01 | Transfer of patent right |