CN109510058A - The erbium-doped super-fluorescent optical fiber source and circuit that mean wavelength is positively correlated with temperature - Google Patents
The erbium-doped super-fluorescent optical fiber source and circuit that mean wavelength is positively correlated with temperature Download PDFInfo
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- CN109510058A CN109510058A CN201811574644.6A CN201811574644A CN109510058A CN 109510058 A CN109510058 A CN 109510058A CN 201811574644 A CN201811574644 A CN 201811574644A CN 109510058 A CN109510058 A CN 109510058A
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- 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06795—Fibre lasers with superfluorescent emission, e.g. amplified spontaneous emission sources for fibre laser gyrometers
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- 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06716—Fibre compositions or doping with active elements
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- 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
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- 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
- H01S3/1305—Feedback control systems
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- 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
- H01S3/131—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
- H01S3/1317—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation by controlling the temperature
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- 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
- H01S3/136—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling devices placed within the cavity
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Abstract
The present invention provides a kind of erbium-doped super-fluorescent optical fiber source that mean wavelength is positively correlated with temperature, including pumping source light channel structure；The pumping source light channel structure includes pump diode, wavelength division multiplexer, erbium-doped fiber, faraday rotation mirror, coupler, isolator and gain smoothing filter；The pump diode, wavelength division multiplexer, erbium-doped fiber, faraday rotation mirror are sequentially connected, and the isolator, gain smoothing filter, coupler are sequentially connected, and the wavelength division multiplexer is connect with isolator, and the coupler is connect with pump diode；The mean wavelength of the gain smoothing filter is positively correlated variation with temperature；The present invention is directed to design a kind of mean wavelength to be positively correlated the light source of variation with temperature, mean wavelength thermal stability is good, spectrum is flat and spectrum is wider, has certain developing meaning, lays a good foundation for the further investigation of optical fibre gyro alternating temperature constant multiplier.
Description
Technical field
The er-doped being positively correlated the present invention relates to a kind of light source and circuit more particularly to a kind of mean wavelength with temperature is super glimmering
Light optical fiber source and circuit, belong to sensory field of optic fibre.
Background technique
Source component of the erbium-doped super-fluorescent optical fiber source as optical fibre gyro, the output performance of light source directly affect optical fiber top
The output performance of spiral shell finally influences the precision of entire inertial navigation system, therefore the design of light source is to entire inertial navigation system all pole
Its is important.The light source being presently used on optical fibre gyro is mainly erbium-doped super-fluorescent optical fiber source, which is a kind of strong excitation shape
Amplified spontaneous emission source under state has preferable mean wavelength thermal stability and power stability, and spectrum is flat and width
It is wider, it can reduce unnecessary optical noise in fiber-optic gyroscope light path system.The constant multiplier of optical fibre gyro is evaluation optical fiber
One important indicator of gyro performance, the size of scale factor error directly affect the navigation accuracy of gyro.Meanwhile optical fibre gyro
Constant multiplier influenced by average wavelength of light source, the relationship of constant multiplier and mean wavelength can indicate are as follows:
Wherein, K is the optical scale factor of gyro, and c is the light velocity in vacuum, and L and D are respectively the total length of fiber optic loop and straight
Diameter,For the mean wavelength of light source.The mean wavelength of fiber optic loop area S and light source related with scale factor errorVariation can
To be given by:
In view of the thermal expansivity of silicon, fiber optic loop should have every degree Celsius of millionth variation, and optical fiber anchor ring
The opposite variation of product S is twice of its perimeter.And in practice, since the expansion of polymer coating makes optical fiber be in tensile stress
Under state, therefore there are the increases of additional length.For 80/165 μm of optical fiber, the total variation of fiber lengths is about 4-
5ppm/ DEG C, then the temperature dependency of area can indicate are as follows:
It is well known that Δ S is to be positively correlated with the variation of Δ T in temperature, from the above equation, we can see that constant multiplier temperature error can be with
It is eliminated by mean wavelength with the be positively correlated light source of variation of temperature.
Middle high-precision optical fiber gyro requires the mean wavelength thermal stability of light source to be less than a few ppm/ DEG C, suitable by selecting
The output characteristics requirement of middle high accuracy gyroscope light source, gain smoothing filter may be implemented in light channel structure and circuit of light sources module
Play the role of as an optical passive component in Er-Doped superfluorescent fiber source vital.Due to gain flattener manufacture craft and
The difference of material is made, different types of gain flattener (such as electrolytic thin-membrane filter types) is fused to Er-Doped superfluorescent fiber source
In optical path, different average wavelength of light source temperature dependency variations can be showed when carrying out the temperature performance test of light source.It passes
The Er-Doped superfluorescent fiber source of system uses electrolytic thin-membrane filter types gain smoothing filter, although two kinds of band different type gains
Variable quantity of the average wavelength of light source of flattener under complete warm process condition is identical, and about 2ppm/ DEG C.But conventional belt electrolyte thin
The light source of film optical filters type filter shows as mean wavelength with the variation tendency of the negatively correlated variation of temperature.
Summary of the invention
One kind is provided the purpose of the invention is to largely eliminate the constant multiplier temperature error of optical fibre gyro
The erbium-doped super-fluorescent optical fiber source and circuit that mean wavelength is positively correlated with temperature.
The object of the present invention is achieved like this:
A kind of erbium-doped super-fluorescent optical fiber source that mean wavelength is positively correlated with temperature, including pumping source light channel structure；Institute
Stating pumping source light channel structure includes pump diode, wavelength division multiplexer, erbium-doped fiber, faraday rotation mirror, coupler, isolator
And gain smoothing filter；The pump diode, wavelength division multiplexer, erbium-doped fiber, faraday rotation mirror are sequentially connected, described
Isolator, gain smoothing filter, coupler are sequentially connected, and the wavelength division multiplexer is connect with isolator, the coupler with
Pump diode connection；The mean wavelength of the gain smoothing filter is positively correlated variation with temperature.
The invention also includes features some in this way:
1. the gain smoothing filter is chirp grating filter plate type filter；
A kind of erbium-doped super-fluorescent optical fiber source circuit that mean wavelength is positively correlated with temperature, characterized in that including power supply
Module, temperature control modules, LD drive module, feedback control module, system control module and pumping source；
The power module connects respectively at temperature control modules, LD drive module, feedback control module, system control module
It connects, LD drive module is connect with pumping source, and pumping source is connect by feedback control module with system control module, and system controls mould
Block is connect by temperature control modules with LD drive module, and system control module is directly connected to LD drive module.
The power module provides ± 5 and three kinds of supply voltages of+3.3V；
The LD drive module uses constant current source power supply form, and by large power triode and field-effect tube as switch
Carry out the closure and disconnection of electric current；
It is characterized in that the feedback control module carries out the stabilization of Output optical power by PI control algolithm.
Compared with prior art, the beneficial effects of the present invention are:
The mean wavelength thermal stability size of light source is the emphasis paid close attention to for a long time, but under temperature match curing conditions, light source
The temperature dependency of mean wavelength is also an emphasis of research, the dynamic of the light source of different temperatures correlation to optical fibre gyro
Can --- constant multiplier temperature error generates different influences.The present invention is directed to design a kind of mean wavelength to be positively correlated with temperature
The light source of variation, mean wavelength thermal stability is good, spectrum is flat and spectrum is wider, has certain developing meaning, is optical fiber top
The further investigation of spiral shell alternating temperature constant multiplier is laid a good foundation.
Detailed description of the invention
Fig. 1 is Er-Doped superfluorescent fiber source circuit module figure；
Fig. 2 is Er-Doped superfluorescent fiber source light channel structure figure；
Fig. 3 is the temperature profile that the present invention uses；
Fig. 4 is the negatively correlated Er-Doped superfluorescent fiber source mean wavelength variation diagram with electrolyte Thin Film Filter type；
Fig. 5 is the positive correlation Er-Doped superfluorescent fiber source output light spectrogram with chirp grating filter plate type filter；
Fig. 6 is the positive correlation Er-Doped superfluorescent fiber source mean wavelength variation diagram with chirp grating filter plate type filter；
Fig. 7 is the Contrast on effect of positive correlation light source and negative correlation light source.
Specific embodiment
Present invention is further described in detail with specific embodiment with reference to the accompanying drawing.
The purpose of the present invention is designing a kind of erbium-doped super-fluorescent optical fiber source that mean wavelength is positively correlated with temperature, propose
A kind of method using gain smoothing filter type change flat type Er-Doped superfluorescent fiber source temperature dependency, this method pass through
Light channel structure, circuit module are designed, and selects the gain smoothing filter of chirp grating filtering sheet type to obtain positive correlation
Erbium-doped super-fluorescent optical fiber source.This mean wavelength that can obtain proposed by the present invention is positively correlated the side of variable light source with temperature
Method not only obtains higher mean wavelength thermal stability and the output of wider spectrum, it is most important that can largely subtract
Scale factor error of the small optical fibre gyro in -40 DEG C~+60 DEG C complete warm ranges.
The present invention including the following steps:
Step 1: it is positively correlated building for light source optical path
Building for Er-Doped superfluorescent fiber source light path system is carried out according to the result after emulation, light channel structure selects double-pass backward knot
Structure, including the pump diode of output wavelength 980nm output power 60mW, the wavelength division multiplexer of 980/1550nm, light every
From device, faraday rotation mirror, optoisolator, photodetector, by light path devices according to the structure designed as shown in Figure 2 successively into
The welding of row optical fiber, and chirp grating filter plate type filter is welded between isolator and coupler, form average wave
Personal attendant's temperature is positively correlated the light channel structure of variable light source；
Step 2: it is positively correlated building for circuit of light sources
Circuit of light sources part is designed, circuit of light sources temperature control module is carried out as master controller using STM32, LD drives mould
The control of the important modules such as block, feedback control module.The debugging sequence of circuit of light sources part is respectively as follows: the debugging of 1 power module, electricity
Source module is the basis that other any one modules work normally；The debugging of 2 temperature control modules, temperature control modules are LD drivings
The most important link that the basis and light-source system that module works normally work normally；The debugging of 3LD drive module, LD driving
Module is the necessary condition of the normal output light of light source energy；The debugging of 4 feedback control modules, feedback control module is light source output light function
The stable guarantee of rate；After the completion of being debugged respectively to each module of light-source system, light source optical path and circuit are installed to and had
It is fixed in heat sink metal shell, and reserves one section of tail optical fiber so as to subsequent performance test；
Step 3: step 1 and step 2 are built into molding Er-Doped superfluorescent fiber source and carry out temperature performance test
Temperature performance test is the Er-Doped superfluorescent fiber source temperature performance test with chirp grating filter plate type filter,
Light-source temperature performance test specifically includes that mean wavelength thermal stability, power stability, spectrum output bandwidth, spectral flatness.
It is average wavelength of light source heat stability testing for the main test that the present invention is designed into.It is set during light-source temperature performance test
The temperature range set is -40 DEG C~+60 DEG C hundred degrees Celsius complete warm ranges.Light source tail optical fiber connects the input port of spectrometer, passes through
Gpib interface by spectrometer collection to spectroscopic data be sent in computer in real time, and have spectrum acquisition data software progress
It receives.
Step 4: the collected alternating temperature spectroscopic data of step 3 is handled by mapping software, draws mean wavelength
Variation with temperature curve observes temperature changing trend and calculates the mean wavelength heat of hundred degree Celsius range inner light source output lights
Stability obtains mean wavelength and is positively correlated the light source of variation with temperature.
The step 1 specifically: design and complete the optical path and circuit portion of optical fibre gyro flat type Er-Doped superfluorescent fiber source
Point, light path part selects double-pass backward structure, including output wavelength 980nm, the pump diode of output power 60mW,
980/1550nm wavelength division multiplexer, isolator, faraday rotation mirror, Er-doped fiber and gain smoothing filter；Circuit portion sorting
STM32 is selected as circuit of light sources master controller, further includes temperature control modules, pump diode drive module, feedback control mould
Block, system detection module etc.；Step 2: light path part and circuit part being subjected to fused fiber splice and welding respectively, and installed
To in heat sink mechanical hull；The step 2 specifically: step 1: according to reasonable manufacture craft and production material, choosing
Chirp grating filter plate type gain flat filter is taken, gain smoothing filter is used to flat light source output spectrum, reduces light
Optical coherence noise in fine gyro；Step 2: er-doped of the production with chirp grating filter plate type gain flat filter is super glimmering
Optical fiber source, so as to subsequent temperature performance test.The step 3 specifically: step 1: certain length output end tail will be had
Fine Er-Doped superfluorescent fiber source is put into high-low temperature incubator, and Temperature of Warm Case course is arranged；Step 2: starting spectroanalysis instrument, using outer
+ 5V DC power supply is connect to light source power supply, by gpib interface real-time reception output spectrum information, and is sent on computer.Institute
It states step 4 specifically: step 1: drawing the er-doped with chirp grating filter plate type gain flat filter using mapping software
Change curve of the optical fiber source mean wavelength in entire temperature history；Step 2: average wave of the observation light source under complete warm course
Long variation tendency, and calculate mean wavelength thermal stability of light source during alternating temperature；Step 3: obtaining mean wavelength with temperature
Be positively correlated the light source of variation.
The present invention is a kind of mean wavelength to be positively correlated the erbium-doped super-fluorescent optical fiber source of variation with temperature, technical solution tool
Body is as follows:
Referring to Fig. 1, being Er-Doped superfluorescent fiber source circuit structure diagram provided by the invention, as shown, er-doped light light source
Circuit part is by STM32 control unit module, power module, temperature control modules, LD drive module, feedback control module and light
It is electrically integrated this few part composition of module pumping source.Master controller of the STM32 control unit as modules such as temperature control, driving, feedbacks；
Power module is that modules provide ± 5 and three kinds of supply voltages of+3.3V respectively in circuit；Temperature control modules use LT company
LTC2053 and LTC1923 chip carries out the temperature control of light source jointly, and control precision is 0.0001 DEG C；LD drive module uses
Constant current source power supply form, and closure and disconnection by large power triode and field-effect tube as switch progress electric current；Feedback
Control module carries out the stabilization of Output optical power by PI control algolithm；Negative tempperature coefficient thermistor, heat in temperature control module
Light emitting diode in electric refrigerator and LD driving, which is all integrated in photoelectricity integration module pumping source, carries out reasonable module encapsulation.
Referring to Fig.2, being Er-Doped superfluorescent fiber source light channel structure figure provided by the invention, as shown, optical path is using after round trip
To structure, the pump light of 980nm is issued by photoelectricity integration module pumping source, is reached after the wavelength division multiplexer of 980/1550nm
Gain media Er-doped fiber is pumped, and the pump light for absorbing 980nm positioned at the erbium ion of low-lying level transits to high level, and certainly
The superfluorescence that large radiation generates 1550nm is provided, a part of superfluorescence is exported by the port 1550nm of wavelength division multiplexer, another
Part superfluorescence carries out secondary pumping after faraday rotation mirror reflects, again through er-doped pipeline, in this way can be significantly
Improve the pumping efficiency of erbium ion.Wherein optoisolator can prevent light source internal from forming laser and eliminate optical fibre gyro feedback letter
Light wave caused by number is unstable；Gain smoothing filter absorbs the energy at 1530 and 1560nm, flat light output spectral pattern.
The temperature profile that the present invention uses is as shown in figure 3, the Er-Doped superfluorescent fiber source with electrolyte Thin Film Filter type
Mean wavelength variation is as shown in figure 4, the Er-Doped superfluorescent fiber source output light spectrogram peace with chirp grating filter plate type filter
Equal wavelength change figure is as shown in Figure 5, Figure 6.
Specific test process operation is as follows:
Step 1: setting high-low temperature incubator temperature, referring to Fig. 3, temperature is increased to+60 DEG C of thermal self-restraint stress simultaneously by room temperature
Heat preservation two hours, insulating process is uniform in order to make the temperature of light source internal, is then down to -40 DEG C with the rate of 1 DEG C/min, the drop
Warm process continues 100 minutes, is equally kept for two hours at -40 DEG C of temperature minimum point, is finally heated up at the same rate, until
It is kept for two hours after+60 DEG C of thermal self-restraint stress.Entire temperature history experienced primary heating and a temperature-fall period, can more fill
The reliability for the proof alternating temperature process divided.
Step 2: the Er-Doped superfluorescent fiber source with chirp grating filter plate type filter is put into incubator, and by light source
Tail optical fiber is drawn.Light source is powered using external+5V DC power supply, and the maximum output current that the power supply is arranged is 1A, in order to avoid circuit event
Current break caused by hindering is influenced caused by light source.As shown in the figure using Advantest company Q8384 model spectrometer into
The acquisition of row spectrum is arranged the wave-length coverage 1520nm-1570nm of spectrum, and is sent out spectroscopic data in real time by gpib interface
It is sent in the data receiver host computer of computer, so as to subsequent data processing.
Step 3: it is real that the Er-Doped superfluorescent fiber source in step 2 with chirp grating filter plate type filter completes temperature performance
After testing, the data processing of output spectrum is carried out, draws the spectrum output of light source at normal temperature, as shown in Figure 5.Mean wavelength is light
Within the scope of spectrum setting 1520nm-1570nm, the weighted average of the corresponding power spectral density of each wavelength points, i.e.,Wherein P (λi) it is each wavelength points λiCorresponding power spectral density draws mean wavelength entire
Variation tendency in temperature history, as shown in fig. 6, the temperature dependency variation of observation mean wavelength, and calculate hundred degrees Celsius
The thermal stability size of mean wavelength, i.e.,WhereinIt is respectively average
Maxima and minima of the wavelength in entire temperature history saves data；
Step 4: the Er-Doped superfluorescent fiber source temperature performance test with electrolyte Thin Film Filter type, test condition are carried out
With test device as shown in step 1 and step 2, data processing method refers to step 3.
Using a kind of utilization gain smoothing filter type difference change flat type Er-Doped superfluorescent fiber source proposed by the present invention
The method of temperature dependency definitely influences the important light path devices of Er-Doped superfluorescent fiber source temperature dependency variation.Electrification
The Er-Doped superfluorescent fiber source of solution matter Thin Film Filter type is shown with the negatively correlated variation tendency of temperature, as shown in figure 4, average wave
Long thermal stability is 2.07ppm/ DEG C.As shown in Figure 5, Figure 6, the Er-Doped superfluorescent fiber source with chirp grating filter plate type filter
Show to be positively correlated with temperature the trend of variation, and average wavelength of light source thermal stability size is 1.98ppm/ DEG C, and spectrum width is
37.57nm meets the requirement (mean wavelength thermal stability, spectrum width) of optical fibre gyro erbium-doped super-fluorescent light source.Finally, we
It obtains mean wavelength to be positively correlated the light source of variation with temperature, the theory analysis based on front, the positive correlation light source is to optical fiber top
The scale factor error compensation of spiral shell has certain advantage, for optical fibre gyro from now on Dynamic Performance Analysis research play it is certain
Pioneering influence.
Above-described specific embodiment and the operation of specific experiment process are used to illustrate the present invention, only of the invention
The preferred embodiment of proposition, rather than limit the invention, it is noted that it is all in the spirit and principles in the present invention
Within any modifications, equivalent replacements, and improvements etc. done, should be included within protection scope of the present invention.For this
For person skilled in the art, under the premise of not departing from the method for the present invention, several improvement can also be proposed, these improvement
It should be regarded as protection scope of the present invention.
In summary: the invention discloses the erbium-doped super-fluorescent optical fiber sources that a kind of mean wavelength is positively correlated with temperature.
Er-Doped superfluorescent fiber source is widely applied to optical fibre gyro neck due to its preferable mean wavelength stability, wider output spectrum
Domain, the mean wavelength temperature dependency of light source directly affect the effect temperature compensation of optic fiber gyroscope graduation factor.It is intended to and sets
Count the erbium-doped super-fluorescent optical fiber source that a mean wavelength is positively correlated with temperature, i.e., by designing light channel structure, circuit module,
And the type for changing Passive Optical Components in light channel structure obtains positively related erbium-doped super-fluorescent optical fiber source, comprising steps of (1) is mixed
The circuit module of erbium optical fiber source designs；(2) the light channel structure design of light source；(3) selection of gain smoothing filter type；
(4) temperature performance test of light source.The available mean wavelength of method proposed by the present invention is positively correlated the mixing of variation with temperature
Erbium optical fiber source, light source output average light wavelength stability is high, spectral pattern is flat, it is most important that is the constant multiplier of optical fibre gyro
Excellent basis has been established in temperature-compensating.
Claims (7)
1. the erbium-doped super-fluorescent optical fiber source that a kind of mean wavelength is positively correlated with temperature, characterized in that including pumping source light path
Structure；The pumping source light channel structure includes pump diode, wavelength division multiplexer, erbium-doped fiber, faraday rotation mirror, coupling
Device, isolator and gain smoothing filter；The pump diode, wavelength division multiplexer, erbium-doped fiber, faraday rotation mirror are successively
Connection, the isolator, gain smoothing filter, coupler are sequentially connected, and the wavelength division multiplexer is connect with isolator, described
Coupler is connect with pump diode；The mean wavelength of the gain smoothing filter is positively correlated variation with temperature.
2. the erbium-doped super-fluorescent optical fiber source that mean wavelength according to claim 1 is positively correlated with temperature, characterized in that
The gain smoothing filter is chirp grating filter plate type filter.
3. the erbium-doped super-fluorescent optical fiber source circuit that a kind of mean wavelength is positively correlated with temperature, characterized in that including power supply mould
Block, temperature control modules, LD drive module, feedback control module, system control module and pumping source；
The power module is connected respectively at temperature control modules, LD drive module, feedback control module, system control module,
LD drive module is connect with pumping source, and pumping source is connect by feedback control module with system control module, system control module
It is connect by temperature control modules with LD drive module, system control module is directly connected to LD drive module.
4. the erbium-doped super-fluorescent optical fiber source circuit that mean wavelength according to claim 3 is positively correlated with temperature, special
Sign is that the power module provides ± 5 and three kinds of supply voltages of+3.3V.
5. the erbium-doped super-fluorescent optical fiber source circuit that mean wavelength according to claim 3 or 4 is positively correlated with temperature,
It is characterized in, the LD drive module uses constant current source power supply form, and by large power triode and field-effect tube as switch
Carry out the closure and disconnection of electric current.
6. the erbium-doped super-fluorescent optical fiber source circuit that mean wavelength according to claim 3 or 4 is positively correlated with temperature,
It is characterized in, the feedback control module carries out the stabilization of Output optical power by PI control algolithm.
7. the erbium-doped super-fluorescent optical fiber source circuit that mean wavelength according to claim 5 is positively correlated with temperature, special
Sign is that the feedback control module carries out the stabilization of Output optical power by PI control algolithm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115014399A (en) * | 2022-08-04 | 2022-09-06 | 中国船舶重工集团公司第七0七研究所 | Scale factor error analysis method of fiber-optic gyroscope |
| CN115824265A (en) * | 2023-02-27 | 2023-03-21 | 中国船舶集团有限公司第七〇七研究所 | Method for reducing temperature sensitivity of scale factor of fiber-optic gyroscope and fiber-optic gyroscope |
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| CN104716559A (en) * | 2013-12-11 | 2015-06-17 | 中国航空工业第六一八研究所 | Mean wavelength compensation method for erbium-doped fiber light source |
| CN108592944A (en) * | 2018-03-23 | 2018-09-28 | 哈尔滨工程大学 | A method of utilizing the temperature characteristic compensation optical fibre gyro alternating temperature constant multiplier of light source |
| CN108666856A (en) * | 2018-08-07 | 2018-10-16 | 核工业理化工程研究院 | Power stability type solid state laser and control method |
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| CN104716559A (en) * | 2013-12-11 | 2015-06-17 | 中国航空工业第六一八研究所 | Mean wavelength compensation method for erbium-doped fiber light source |
| CN108592944A (en) * | 2018-03-23 | 2018-09-28 | 哈尔滨工程大学 | A method of utilizing the temperature characteristic compensation optical fibre gyro alternating temperature constant multiplier of light source |
| CN108666856A (en) * | 2018-08-07 | 2018-10-16 | 核工业理化工程研究院 | Power stability type solid state laser and control method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115014399A (en) * | 2022-08-04 | 2022-09-06 | 中国船舶重工集团公司第七0七研究所 | Scale factor error analysis method of fiber-optic gyroscope |
| CN115824265A (en) * | 2023-02-27 | 2023-03-21 | 中国船舶集团有限公司第七〇七研究所 | Method for reducing temperature sensitivity of scale factor of fiber-optic gyroscope and fiber-optic gyroscope |
| CN115824265B (en) * | 2023-02-27 | 2023-04-21 | 中国船舶集团有限公司第七〇七研究所 | Method for reducing temperature sensitivity of scale factor of fiber optic gyroscope and fiber optic gyroscope |
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