CN108931304A - A kind of pulsed light power measuring system and method - Google Patents
A kind of pulsed light power measuring system and method Download PDFInfo
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- CN108931304A CN108931304A CN201810821710.9A CN201810821710A CN108931304A CN 108931304 A CN108931304 A CN 108931304A CN 201810821710 A CN201810821710 A CN 201810821710A CN 108931304 A CN108931304 A CN 108931304A
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- 238000000034 method Methods 0.000 title abstract description 11
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 53
- 238000005259 measurement Methods 0.000 claims abstract description 36
- 239000000835 fiber Substances 0.000 claims description 17
- 238000000354 decomposition reaction Methods 0.000 claims description 15
- 238000000691 measurement method Methods 0.000 claims description 9
- 239000013307 optical fiber Substances 0.000 claims description 2
- 230000005622 photoelectricity Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
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- 238000009434 installation Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J11/00—Measuring the characteristics of individual optical pulses or of optical pulse trains
Abstract
The invention discloses a kind of pulsed light power measuring system and methods, the system includes: optical attenuator, photoelectric conversion plate, oscillograph and processor, optical attenuator is decayed to light source output to be measured to light signal, and by exporting to light signal to photoelectric conversion plate after decaying；The luminous energy to light signal after decaying is converted the first electric energy by photoelectric conversion plate, is transmitted to oscillograph；The waveform of the first electric energy of oscilloscope measurement obtains first amplitude；Processor calculates the mean power of the optical signal of light source output to be measured according to the attenuation ratio of optical attenuator, the transfer efficiency of photoelectric conversion plate and first amplitude.Pulsed light power measuring system provided by the invention and method convert waveform for the optical signal of pulse light output and show on oscillograph, so as to calculate the power of pulsed light according to the other parameters of the amplitude of single pulse and system, it is opposite more accurate with power meter measurement optical power, reliably.
Description
Technical field
The present invention relates to measuring light power fields, and in particular to a kind of pulsed light power measuring system and method.
Background technique
Light source is one of essential device in optical system, and the power of optical signal can be reasonable in accurate measuring system
The parameter of each device in matching system, optimization system performance.Especially in optical fiber sensing system, light source power is too small, can lead
Signal is too weak in cause system, reduces the signal-to-noise ratio of system；If light source power is too big, be easy to cause in optics non-linear is excited
Scattering effect causes the distortion of system signal；Therefore accurate measurement light source power, selects suitable light source power, for optics
It is most important for system.
Currently, measurement optical power generally uses desk-top or hand-held optical power gauge, this mode is easy, device is easy to get, right
It is accurate, reliable in the measurement of continuous light, it is the preferred manner of continuous measuring light power.But the measurement for pulse optical power,
For burst pulse light, since the rising edge of pulse and failing edge duration are all very short, and the response of power meter
Time is longer, this results in power meter that cannot accurately measure the output energy of each pulse of burst pulse light, so often function
The optical power for the pulsed light that rate measures is less accurate.
Summary of the invention
In view of this, the present invention provides a kind of pulsed light power measuring system and method, to solve to make in the prior art
The rising edge and failing edge of pulsed light can not be measured, effectively with power meter so as to cause the problem of measurement inaccuracy.
Technical solution proposed by the present invention is as follows:
The embodiment of the present invention provides a kind of pulsed light power measuring system, which includes: optical attenuator, photoelectricity turn
Change plate, oscillograph and processor, wherein the optical attenuator is decayed to light source output to be measured to light signal, and will
Exporting to light signal to the photoelectric conversion plate after decaying；The photoelectric conversion plate by after the decaying to light signal
Luminous energy be converted into the first electric energy, be transmitted to the oscillograph；The waveform of first electric energy described in the oscilloscope measurement obtains
One amplitude；The processor is according to the attenuation ratio of the optical attenuator, the transfer efficiency of the photoelectric conversion plate and described
One amplitude calculates the mean power of the optical signal of the light source output to be measured.
Preferably, pulse width, the repetition rate of light source output optical signal to be measured described in the oscilloscope measurement；The place
Reason device calculates the peak work of the optical signal of the light source output to be measured according to the pulse width, repetition rate and mean power
Rate.
Preferably, the pulsed light power measuring system further include: light power meter and fiber coupler, the light power meter
The Output optical power of measurement standard light source；The optical signal that the optical attenuator exports the standard sources is decayed, and will
Optical signal after decaying is exported to the fiber coupler；The fiber coupler receives the optical signal after the decaying, and will
Optical signal after the decaying is divided into two beams and decomposes light, is separately input into the light power meter and photoelectric conversion plate；The smooth function
The decomposition optical power of the decomposition light of rate meter measurement input；The photoelectric conversion plate converts second for the luminous energy of the decomposition light of input
Electric energy is transmitted to the oscillograph；Second amplitude of the second electric energy waveform described in the oscilloscope measurement；The processor according to
The Output optical power and decompose optical power and calculate the attenuation ratio of the optical attenuator, and according to second amplitude and
Decompose the transfer efficiency that optical power calculates the photoelectric conversion plate.
Preferably, the splitting ratio of the fiber coupler is 1:1.
In order to achieve the above object, correspondingly, the embodiment of the present invention proposes a kind of pulse optical power measurement method, the party
Method includes: decaying to light signal by light source output to be measured by optical attenuator；It will be through decaying by photoelectric conversion plate
The luminous energy of optical signal afterwards is converted to the first electric energy；Pass through the first amplitude of the first electric energy waveform described in oscilloscope measurement；According to
The attenuation ratio of the optical attenuator, the transfer efficiency of the photoelectric conversion plate and the first amplitude calculate light source output to be measured
The mean power to light signal.
Preferably, pass through the pulse width to light signal, the repetition rate of light source output to be measured described in oscilloscope measurement；
The peak work to light signal of light source output to be measured is calculated according to the pulse width, repetition rate and the mean power
Rate.
Preferably, the conversion that the attenuation ratio and the photoelectric conversion plate of the optical attenuator are obtained by following steps is imitated
Rate: pass through the Output optical power of light power meter measurement standard light source；The standard sources is exported by the optical attenuator
Optical signal is decayed；The optical signal after decaying is divided into two beams by fiber coupler and decomposes light；Pass through the optical power
Meter measures wherein a branch of optical power for decomposing light；Second be converted by the luminous energy that another beam of the oscilloscope measurement decomposes light
Second amplitude of the waveform of electric energy；The decaying of the optical attenuator is calculated according to the Output optical power and the optical power for decomposing light
Ratio, and according to second amplitude and decompose the optical power of light and calculate the conversion power of the photoelectric conversion plate.
Preferably, it is 1:1 that two beam, which decomposes the optical power ratio of light,.
Technical solution of the present invention has the advantages that
1. the optical signal of pulse light output is converted waveform by pulsed light power measuring system provided by the invention and method
It is shown on oscillograph, so as to calculate the power of pulsed light, phase according to the other parameters of the amplitude of single pulse and system
To with power meter measurement optical power it is more accurate, reliably.
2. pulsed light power measuring system structure provided by the invention is simple, build conveniently, system constitution equipment and device
It is very common in optical system, but in simultaneity factor each synthesizer part also he use, the service efficiency of device can be improved.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural representation for measuring light source optical power to be measured in the embodiment of the present invention 1 in pulsed light power measuring system
Figure；
Fig. 2 is the attenuation ratio and photoelectricity for measuring optical attenuator in the embodiment of the present invention 1 in pulsed light power measuring system
The structural schematic diagram of the transfer efficiency of change-over panel.
Appended drawing reference:
1- light source to be measured；2- optical attenuator；3- photoelectric conversion plate；4- oscillograph；5- processor；6- standard sources；7- light
Power meter；8- fiber coupler.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can be with
It is the connection inside two elements, can be wireless connection, be also possible to wired connection.For those of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
As long as in addition, the non-structure each other of technical characteristic involved in invention described below different embodiments
It can be combined with each other at conflict.
Embodiment 1
The present embodiment provides a kind of pulsed light power measuring systems, as shown in Figure 1, the pulsed light power measuring system is main
It include: optical attenuator 2, photoelectric conversion plate 3, oscillograph 4 and processor 5, wherein the incident optical power that photoelectric conversion plate 3 is born
It is limited, it is therefore desirable to which that optical attenuator 2 is decayed to what light source 1 to be measured exported to light signal, and by the light to be measured after decaying
Signal is exported to photoelectric conversion plate 3；The luminous energy to light signal after decaying is converted the first electric energy by photoelectric conversion plate 3, passes
Transport to oscillograph 4；The waveform that oscillograph 4 measures the first electric energy obtains first amplitude；Processor 5 is according to the decaying of optical attenuator 2
Ratio, the transfer efficiency of photoelectric conversion plate 3 and first amplitude calculate the mean power for the optical signal that light source 1 to be measured exports, specifically
Ground can calculate the mean power of 1 output optical signal of light source to be measured by following formula (1).
Wherein, B is the transfer efficiency of photoelectric conversion plate 3, and A is the attenuation ratio of optical attenuator 2, V1For first amplitude.
In embodiments of the present invention, the attenuation ratio A of the transfer efficiency B of photoelectric conversion plate 3 and optical attenuator 2 can be led to
Standard sources is crossed to measure.Specific measurement process is as follows:
In a preferred embodiment, in order to realize the transfer efficiency B of the photoelectric conversion plate 3 and attenuation ratio A of optical attenuator 2
Measurement, the pulsed light power measuring system of the embodiment of the present invention is additionally provided with: light power meter 7 and fiber coupler 8, such as Fig. 2
It is shown, the Output optical power of 7 measurement standard light source 6 of light power meter；Optical attenuator 2 carries out the optical signal that standard sources 6 exports
Decaying, and the optical signal after decaying is exported to fiber coupler 8；Optical signal after 8 receiving attenuation of fiber coupler, and will decline
Optical signal after subtracting is divided into two beams and decomposes light, is separately input into light power meter 7 and photoelectric conversion plate 3；The measurement input of light power meter 7
Decomposition light decomposition optical power；The luminous energy of the decomposition light of input is converted the second electric energy by photoelectric conversion plate 3, is transmitted to oscillography
Device 4；Oscillograph 4 measures the second amplitude of the second electric energy waveform；Processor 5 is according to Output optical power and decomposes optical power calculating light
The attenuation ratio of attenuator 2, and according to the second amplitude and decompose the transfer efficiency of light power meter photoelectric conversion plate 3, wherein it can be with
The attenuation ratio of optical attenuator 2 is calculated by formula (2), and the transfer efficiency of photoelectric conversion plate 3 can be calculated by formula (3).
Wherein, POutFor the Output optical power of standard sources 6, PIt surveysWherein a branch of point for being input to light power meter for optical attenuator
The optical power of Xie Guang,The ratio of the two beams decomposition light of light power meter 7 and photoelectric conversion plate 3 is separately input into for fiber coupler 8
Value.
Wherein, PIt surveysThe optical power of wherein a branch of decomposition light of light power meter, V are input to for optical attenuator2For the second amplitude.
In a preferred embodiment, pulsed light power measuring system provided by the invention can also further measure pulsed light
Peak power, wherein oscillograph 4 measures pulse width, the repetition rate for the optical signal that light source 1 to be measured exports；Processor 5
The peak power to light signal that light source 1 to be measured exports is calculated according to pulse width, repetition rate and mean power, specifically,
The peak power to light signal that light source 1 to be measured exports can be calculated by formula (4).
Wherein, T is pulse width, and f is repetition rate.
In a preferred embodiment, the splitting ratio of fiber coupler 8 is 1:1, i.e.,Value be 1.
In embodiments of the present invention, standard sources 6 can be wide spectrum continuous light source, and light power meter 7 can be hand-held or desk-top
Light power meter, photoelectric conversion plate 3 can be transient state photoelectric conversion plate.But it above are only for example, being not intended to limit the invention.
Pulsed light power measuring system provided in an embodiment of the present invention converts waveform for the optical signal of pulse light output and shows
Show on oscillograph, so as to calculate the power of pulsed light according to the other parameters of the amplitude of single pulse and system, relatively
It is more accurate with power meter measurement optical power, reliably.And the pulsed light power measuring system structure is simple, builds conveniently, is
Unite constitution equipment and device it is very common in optical system, but in simultaneity factor each synthesizer part also he use, device can be improved
The service efficiency of part.
Embodiment 2
Originally apply example and a kind of pulse optical power measurement method be provided, specifically can above-described embodiment through the invention pulse flash ranging
Amount system realizes that the pulse optical power measurement method mainly includes the following steps: light source output to be measured through optical attenuator
Decay to light signal；The luminous energy of the optical signal after decaying is converted into the first electric energy by photoelectric conversion plate；Pass through
The first amplitude of oscilloscope measurement the first electric energy waveform；According to the transfer efficiency of the attenuation ratio of optical attenuator, photoelectric conversion plate
The mean power to light signal of light source output to be measured is calculated with first amplitude, light source to be measured can be calculated by formula (1)
The mean power of output optical signal.
Wherein, B is the transfer efficiency of photoelectric conversion plate, and A is the attenuation ratio of optical attenuator, V1For first amplitude.
In a preferred embodiment, the attenuation ratio and photoelectric conversion plate of optical attenuator can be obtained by following steps
Transfer efficiency: pass through the Output optical power of light power meter measurement standard light source；The light for being exported standard sources by optical attenuator
Signal is decayed；The optical signal after decaying is divided into two beams by fiber coupler and decomposes light；It is measured by light power meter
Wherein a branch of optical power for decomposing light；Pass through the waveform for the second electric energy that the luminous energy that another beam of oscilloscope measurement decomposes light is converted into
The second amplitude；Attenuation ratio is calculated according to Output optical power and the optical power for decomposing light, and according to the second amplitude and decomposes light
Optical power calculate conversion power, wherein can by formula (2) calculate optical attenuator attenuation ratio, formula can be passed through
(3) transfer efficiency of photoelectric conversion plate is calculated.
Wherein, POutFor the Output optical power of standard sources, PIt surveysWherein a branch of point for being input to light power meter for optical attenuator
The optical power of Xie Guang,The ratio of the two beams decomposition light of light power meter and photoelectric conversion plate is separately input into for fiber coupler.
Wherein, PIt surveysThe optical power of wherein a branch of decomposition light of light power meter, V are input to for optical attenuator2For the second amplitude.
In a preferred embodiment, measurement method provided by the invention can also measure the peak power of pulsed light, including
Following steps pass through the pulse width to light signal, the repetition rate of oscilloscope measurement light source output to be measured；It is wide according to pulse
Degree, repetition rate and mean power calculate the peak power of the optical signal of light source output to be measured, can be calculated by formula (4) to
Survey the peak power to light signal of light source output.
Wherein, T is pulse width, and f is repetition rate.
In a preferred embodiment, it is 1:1 that two beams, which decompose the optical power ratio of light, i.e.,Value be 1.
In embodiments of the present invention, standard sources can be wide spectrum continuous light source, and light power meter can be hand-held or desk-top light
Power meter, photoelectric conversion plate can be transient state photoelectric conversion plate.But it above are only for example, being not intended to limit the invention.
Pulse optical power measurement method provided in an embodiment of the present invention, is converted into using the luminous energy of the optical signal of light source output
Electric energy waveshape pulsed light optical power, this method is opposite more accurate with power meter measurement optical power, reliably.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (8)
1. a kind of pulsed light power measuring system characterized by comprising optical attenuator, photoelectric conversion plate, oscillograph and processing
Device, wherein
The optical attenuator decays to light source output to be measured to light signal, and will export after decaying to light signal
To the photoelectric conversion plate；
The luminous energy to light signal after the decaying is converted the first electric energy by the photoelectric conversion plate, is transmitted to the oscillography
Device；
The waveform of first electric energy described in the oscilloscope measurement obtains first amplitude；
The processor is according to the attenuation ratio of the optical attenuator, the transfer efficiency of the photoelectric conversion plate and first width
Value calculates the mean power of the optical signal of the light source output to be measured.
2. pulsed light power measuring system according to claim 1, which is characterized in that
Pulse width, the repetition rate of light source output optical signal to be measured described in the oscilloscope measurement；
The processor calculates the optical signal of the light source output to be measured according to the pulse width, repetition rate and mean power
Peak power.
3. pulsed light power measuring system according to claim 1, which is characterized in that further include: light power meter and optical fiber
Coupler,
The Output optical power of the light power meter measurement standard light source；
The optical signal that the optical attenuator exports the standard sources is decayed, and the optical signal after decaying is exported to institute
State fiber coupler；
The fiber coupler receives the optical signal after the decaying, and the optical signal after the decaying is divided into two beams and is decomposed
Light is separately input into the light power meter and photoelectric conversion plate；
The decomposition optical power of the decomposition light of the light power meter measurement input；
The luminous energy of the decomposition light of input is converted the second electric energy by the photoelectric conversion plate, is transmitted to the oscillograph；
Second amplitude of the second electric energy waveform described in the oscilloscope measurement；
The processor calculates the attenuation ratio of the optical attenuator according to the Output optical power and decomposition optical power, and
The transfer efficiency of the photoelectric conversion plate is calculated according to second amplitude and decomposition optical power.
4. pulsed light power measuring system according to claim 3, which is characterized in that the splitting ratio of the fiber coupler
For 1:1.
5. a kind of pulse optical power measurement method, which comprises the steps of:
Pass through optical attenuator decaying to light signal by light source output to be measured；
The luminous energy of the optical signal after decaying is converted into the first electric energy by photoelectric conversion plate；
Pass through the first amplitude of the first electric energy waveform described in oscilloscope measurement；
It is calculated according to the attenuation ratio of the optical attenuator, the transfer efficiency of the photoelectric conversion plate and the first amplitude to be measured
The mean power to light signal of light source output.
6. pulse optical power measurement method according to claim 5, which is characterized in that further include:
Pass through the pulse width to light signal, the repetition rate of light source output to be measured described in oscilloscope measurement；
The peak value to light signal of light source output to be measured is calculated according to the pulse width, repetition rate and the mean power
Power.
7. pulse optical power measurement method according to claim 5, which is characterized in that obtain the light by following steps
The transfer efficiency of the attenuation ratio of attenuator and the photoelectric conversion plate:
Pass through the Output optical power of light power meter measurement standard light source；
The optical signal that the standard sources exports is decayed by the optical attenuator；
The optical signal after decaying is divided into two beams by fiber coupler and decomposes light；
Wherein a branch of optical power for decomposing light is measured by the light power meter；
Second amplitude of the waveform for the second electric energy being converted by the luminous energy that another beam of the oscilloscope measurement decomposes light；
The attenuation ratio of the optical attenuator is calculated according to the Output optical power and the optical power for decomposing light, and according to institute
It states the second amplitude and the optical power for decomposing light calculates the conversion power of the photoelectric conversion plate.
8. pulse optical power measurement method according to claim 7, which is characterized in that two beam decomposes the optical power of light
Than for 1:1.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109596228A (en) * | 2018-12-14 | 2019-04-09 | 中国工程物理研究院激光聚变研究中心 | A kind of nanosecond pulse laser waveform measuring device |
| CN110007135A (en) * | 2019-03-26 | 2019-07-12 | 广东复安科技发展有限公司 | A kind of calculation method and system of the input optical power of photodetector |
| CN113252317A (en) * | 2021-06-02 | 2021-08-13 | 柯泰光芯(常州)测试技术有限公司 | System and method for testing light effect of extremely-short light pulse |
| CN113884753A (en) * | 2021-08-17 | 2022-01-04 | 之江实验室 | Laser output power measuring circuit |
| CN115529079A (en) * | 2021-06-25 | 2022-12-27 | 科大国盾量子技术股份有限公司 | Signal state and decoy state average photon number online detection device and method |
| CN113884753B (en) * | 2021-08-17 | 2024-05-03 | 之江实验室 | Laser output power measuring circuit |
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| CN201438135U (en) * | 2009-06-02 | 2010-04-14 | 中兴通讯股份有限公司 | Light-power waveform detection device |
| CN101773705A (en) * | 2010-01-08 | 2010-07-14 | 北京工业大学 | Quality detector of selective spectral bright light medical equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201438135U (en) * | 2009-06-02 | 2010-04-14 | 中兴通讯股份有限公司 | Light-power waveform detection device |
| CN101773705A (en) * | 2010-01-08 | 2010-07-14 | 北京工业大学 | Quality detector of selective spectral bright light medical equipment |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109596228A (en) * | 2018-12-14 | 2019-04-09 | 中国工程物理研究院激光聚变研究中心 | A kind of nanosecond pulse laser waveform measuring device |
| CN110007135A (en) * | 2019-03-26 | 2019-07-12 | 广东复安科技发展有限公司 | A kind of calculation method and system of the input optical power of photodetector |
| CN110007135B (en) * | 2019-03-26 | 2024-03-26 | 广东复安科技发展有限公司 | Method and system for calculating input optical power of photoelectric detector |
| CN113252317A (en) * | 2021-06-02 | 2021-08-13 | 柯泰光芯(常州)测试技术有限公司 | System and method for testing light effect of extremely-short light pulse |
| CN115529079A (en) * | 2021-06-25 | 2022-12-27 | 科大国盾量子技术股份有限公司 | Signal state and decoy state average photon number online detection device and method |
| CN113884753A (en) * | 2021-08-17 | 2022-01-04 | 之江实验室 | Laser output power measuring circuit |
| CN113884753B (en) * | 2021-08-17 | 2024-05-03 | 之江实验室 | Laser output power measuring circuit |
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Application publication date: 20181204 |