CN106785843A - A kind of fine tunable single-frequency short cavity optical fiber laser of frequency - Google Patents
A kind of fine tunable single-frequency short cavity optical fiber laser of frequency Download PDFInfo
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- CN106785843A CN106785843A CN201710038003.8A CN201710038003A CN106785843A CN 106785843 A CN106785843 A CN 106785843A CN 201710038003 A CN201710038003 A CN 201710038003A CN 106785843 A CN106785843 A CN 106785843A
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- laser
- frequency
- fiber
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- bragg grating
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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
- H01S3/0675—Resonators including a grating structure, e.g. distributed Bragg reflectors [DBR] or distributed feedback [DFB] fibre lasers
-
- 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
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Abstract
The invention discloses a kind of fine tunable single-frequency short cavity optical fiber laser of frequency, including the laser pumping source with fibre optic isolater, high reflection bragg grating, the Er-doped fiber of the miscellaneous concentration of Erbium-doped high, low reflection polarization-maintaining type bragg grating, tuner, high reflection bragg grating and low reflection polarization-maintaining type bragg grating constitute optical resonator, and tuner includes the driven member that piezoelectric ceramics trigger is fixedly connected with piezoelectric ceramics trigger.The pump light that laser pumping source sends to sequentially pass through after fibre optic isolater, high reflection bragg grating and absorbed by Er-doped fiber and produce laser, laser is shaken so as to constantly amplify back and forth in optical resonator, and is exported through low reflection polarization-maintaining type bragg grating.The present invention controls laser Er-doped fiber length by controlling the stroke of piezoelectric ceramics, changes laser output frequency, realizes frequency fine tuning.Stability Analysis of Structures of the present invention, effective transmission channel are more, long lifespan.
Description
Technical field
The invention belongs to the fine tunable single-frequency short cavity of tunable optical fiber laser technical field, especially a kind of frequency
Optical fiber laser.
Background technology
Adjustable length flexible, line width, service life is high, cost economy spy because it has for tunable optical fiber laser
Point, it has extensive use, and especially its performance compatible with optical fiber telecommunications system is good, and it realizes full light in having turned into all-optical network
Wavelength numbering, light is cross interconnected, light inserts the Primary Component for the function such as point answering.Additionally, Wavelength Tunable Fiber Ring Laser can be with
In terms of the scanning light source being applied in such as sensor field and the monitor in real time for realizing single-point, multiple spot and sensor array, and
The fields such as laser radar, laser remote sensing and spectral measurement analysis can also be applied to.
At present, tunable optical fiber laser is mostly to use Fiber Bragg Grating FBG（FBG）Tuning manner, and optical fiber
The tuning methods of Bragg grating because the favorable compatibility between Fiber Bragg Grating FBG and optical fiber, low cost, low-loss, easily with
Other fiber couplings, to polarization insensitive and encapsulate it is simple the features such as, be applied to commercial use.
Wherein, by the way of this commercial tunable optical fiber laser is tuned using stress mostly, i.e., using piezoelectric ceramics
（PZT）Apply axial stress on fiber grating, Prague of fiber grating is adjusted by changing fiber grating axial strain
（Bragg）Wavelength change, so as to realize wavelength tuning.But, the narrower fiber grating of current reflection bandwidth mainly uses phase
Position mask method is made, and the coat of peeling optical fibre is needed in manufacturing process, causes fiber grating easy fracture, and tensile strength is low
Shortcoming；And Active Optical Fiber and fiber grating fusion point are highly susceptible to the influence of optical fiber optical grating stress change.In addition, optical fiber light
The basic optical characteristic of grid is with Prague（Bragg）Narrow band optical filter centered on wavelength, its reflective Bragg
（Bragg）The light of centre wavelength.When Fiber Bragg Grating FBG is acted on by external force, effect and grating due to elasto-optical effect
The change in cycle, will cause the skew of Fiber Bragg Grating FBG back wave centre wavelength；And work as wavelength shift to laser another
During pattern, Output of laser wavelength changes, namely realizes tuning.The result of this tuning methods is that tuning wavelength is discrete
, in addition tuning interval be at least an intermode away from.By Fiber Bragg Grating FBG（FBG）Stress applies limitation, fiber grating
The tuning range of stress tuning is relatively small.For short cavity or Ultrashort cavity, its intermode is finally capable of outgoing away from larger
Optical maser wavelength or frequency are smaller.In sum, based on Fiber Bragg Grating FBG（FBG）The optical laser of stress tuning is real
The channel that can be transmitted reduces, and transfer resource is wasted significantly.
The content of the invention
In order to overcome the deficiencies in the prior art, swash the invention provides a kind of fine tunable single-frequency short cavity optical fiber of frequency
With containing piezoelectric ceramics be connected active Er-doped fiber in interior piezoelectric ceramics trigger by light device, the present invention, by precise control
The stroke of piezoelectric ceramics carrys out the length of active control Er-doped fiber, so as to change laser output frequency, realizes tunable, sheet
Invention has the advantages that Stability Analysis of Structures, effective transmission channel be more, the life-span is longer.
To achieve these goals, the technical solution adopted by the present invention is：A kind of fine tunable single-frequency short cavity of frequency
Optical fiber laser, including laser pumping source, optical resonator, tuner, the output end connection Fiber isolation of laser pumping source
Device, fibre optic isolater is connected with the input port of optical resonator, and the output port of optical resonator is exported through optical resonator
Laser after amplification, it is characterised in that：Fiber resonance cavity includes high reflection bragg grating and low reflective Bragg optical fiber
Grating, one end of high reflection bragg grating is connected with fibre optic isolater, the other end of high reflection bragg grating
It is connected with the input of Er-doped fiber, the output end of Er-doped fiber is connected with low reflective Bragg fiber grating, low reflection Bradley
The output end of lattice fiber grating is connected with the output port of optical resonator, and the tuner includes containing piezoelectric ceramics and position
Put sensor and be fixedly connected to form the synchronous fortune with piezoelectric ceramics in interior piezoelectric ceramics trigger and with piezoelectric ceramics trigger
The driven member of dynamic matching relationship, the piezoelectric ceramics trigger and driven member are axially installed on er-doped light successively along Er-doped fiber
On fibre.
In said structure, pump light source laser enters laserresonator by high reflection bragg grating（By a pair
The high reflection and low reflective Bragg fiber grating for matching constitute laserresonator）, pump light is into being incorporated after resonator
Erbium fiber absorption simultaneously produces laser, and the laser of generation is exported through the output end of low reflection polarization-maintaining fiber grating, and said structure passes through
The collapsing length of the piezoelectric ceramics that change is connected with Er-doped fiber is numbered come the length for driving Er-doped fiber, so as to realize swashing
The output of light frequency tuning.
Further, the laser pumping source uses the semiconductor laser with tail optical fiber, the semiconductor laser to pass through tail
The fine input welding with high reflection bragg grating.
In said structure, tunable fiber laser pumping source uses semiconductor laser, and pumping source can the company of realization
Continuous stabilization output, while its power output can be by control electric current and adjust.Laser is exported by tail optical fiber, and tail optical fiber passes through
Welding is connected with fibre optic isolater one end, and the fibre optic isolater other end is connected with high reflection fiber grating.
Further, the reflectivity of the high reflection bragg grating is 99.99%.
In said structure, the centre wavelength of high reflection bragg grating is 1550.02nm, and reflection bandwidth is
0.29nm, length is 5mm.
Further, mixed with gain media in the Er-doped fiber, the gain media is phosphoric acid salt medium.
In said structure, the Er-doped fiber preferably phosphate Er-doped fiber that the present invention is used, at the fibre core peak of 1530nm
More than 200dB/m, its length is 15mm to value absorptivity.
Further, the low reflective Bragg fiber grating uses polarization-maintaining type fiber grating, laser reflectivity to be not less than
70%, bandwidth is less than 0.02nm.
In said structure, low light reflectivity fibre grating is polarization-maintaining type fiber grating, and its reflectivity is preferably 70%, centre wavelength
It is 1549.98nm, its reflection bandwidth is 0.02nm, its effective length is less than or equal to 100mm.
Further, the piezoelectric ceramics trigger is full closed ceramic assembling structure, the full closed ceramic assembling
Structure is contained within piezoelectric ceramics and position sensor, and the displacement accuracy of the piezoelectric ceramics is Subnano-class.
Further, the closed assembling structure is in cylindrical structure, and the cylindrical outer surface is through gluing in er-doped light
Fine periphery.
Further, the driven member be cylindrical structure, the cylindrical outer surface through gluing in Er-doped fiber periphery,
Middle the heart channel of Hang-Shaoyin fastener of the radial end face of cylinder one is connected with a radial end face center of piezoelectric ceramics trigger.
In said structure, tuner includes one piece of piezoelectric ceramics trigger and the stainless steel with diameter of cylindrical structure
Cylinder.There is one section of cylindrical projection piezoelectric ceramics trigger one end, can be inserted in stainless steel cylinder, and can be screwed, piezoelectricity
The ceramic trigger other end is connected with controller, and the length of piezoelectric ceramics is changed using controller, respectively will using adhesive
Piezoelectric ceramics trigger, stainless steel cylinder and Er-doped fiber are bonded together.
Using such scheme, present invention design a kind of new laser tuning device and tuning methods will particularly have
Source Er-doped fiber one end adhesive is fixed on piezoelectric ceramics trigger, the other end of active Er-doped fiber with and piezoelectric ceramics
The cylindrical metal block of same size is connected；The present invention is by the stroke of precise control piezoelectric ceramics come active control laser
Er-doped fiber length, so as to change laser output frequency, realizes tunable；Whole laser bodies construction packages of the invention
In the closed structure of shock insulation insulation, resonator normal temperature is ensured using semiconductor chilling plate.Connect in laser input and output side
Connect isolator（ISO）, it is ensured that one-way transmission.
The present invention is connected using piezoelectric ceramics with Er-doped fiber, it is to avoid the step of the coat of peeling optical fibre, so as to keep away
Exempt from fiber grating fracture, the fusion point that Er-doped fiber and fiber grating are it also avoid in addition is subject to the shadow of optical fiber optical grating stress change
Ring；Separately, the present invention is filled in closed assembling structural body by piezoelectric ceramics and avoids influence of the external environment to its accuracy,
Such that it is able to the stroke of precision controlling piezoelectric ceramics, feedback obtains the length actual change amount of Er-doped fiber；It is of the invention used
The least displacement precision of piezoelectric ceramics is sub- nanometer scale, it is possible to achieve the tuning interval of 3MHz or so, and maximal dilation length is
30um, can reach the tuning range of 10GHz, with bigger communication channel, can provide the transmission rate and biography of more Gao Geng great
Defeated capacity.The present invention is capable of achieving Linear Tuning in whole tuning range, and tunes repeatable accuracy less than 0.6%, tuning speed
Hurry up.Compared to the tuning scheme tuned based on FBG stress, the present invention has Stability Analysis of Structures, effective transmission channel many, and the life-span is longer etc.
Advantage.
The invention will be further described below in conjunction with the accompanying drawings.
Brief description of the drawings
Accompanying drawing 1 is the tunable DBR laser agent structure of the present embodiment；
In accompanying drawing, the part example table representated by each label is as follows：
Laser pumping source 1（Semiconductor laser with tail optical fiber output）, fibre optic isolater 2, stainless steel cylinder 3, stack pressure
Electroceramics trigger 4, high reflection bragg grating 5, doping phosphoric acid salt Er-doped fiber 6, low reflection polarization-maintaining type Prague light
Fine grating 7.
Specific embodiment
Specific embodiment of the invention is as shown in Figure 1 the fine tunable single-frequency short cavity DBR optical fiber lasers of frequency, should
Laser is including the laser pumping source 1 with fibre optic isolater 2, high reflection bragg grating 5, mixed with gain medium
Er-doped fiber 6, low reflection polarization-maintaining type bragg grating 7, tuner, high reflection bragg grating 5 and low reflection
Polarization-maintaining type bragg grating 7 constitute optical resonator, laser pumping source 1 output end connection fibre optic isolater 2, optical fiber every
It is connected with the input port of optical resonator from device 2, after the output port output of optical resonator is amplified through optical resonator
Laser, one end of high reflection bragg grating 5 is connected with fibre optic isolater 2, high reflection bragg grating 5 it is another
End is connected with the input of Er-doped fiber 6, and the output end of Er-doped fiber 6 is connected with low reflection polarization-maintaining type bragg grating 7,
The output end of low reflection polarization-maintaining type bragg grating 7 is connected with the output port of optical resonator, and tuner includes containing
Have piezoelectric ceramics and position sensor interior stack piezoelectric ceramics trigger 4 and with stack piezoelectric ceramics trigger 4
The driven member of the matching relationship that is synchronized with the movement with piezoelectric ceramics is fixedly connected to form, the stack piezoelectric ceramics trigger 4 and quilt
Actuator is axially installed on Er-doped fiber 6 successively along Er-doped fiber 6.Above-mentioned pump light source laser is by high reflection Prague light
Fine grating 5 enters laserresonator（Constituted by the high reflection and low reflection polarization-maintaining type bragg grating 7 that match for a pair
Laserresonator）, pump light absorbs by high erbium-doped fiber 6 and produces laser, and the laser of generation is through low reflection polarization-maintaining fiber grating
Output end is exported, and the present invention changes Er-doped fiber 6 by changing the collapsing length of the piezoelectric ceramics being connected with Er-doped fiber 6
Length, so as to realize that laser frequency tuning is exported.
Above-mentioned tunable fiber laser pumping source 1 uses semiconductor laser, and pumping source can realize continuous-stable
Output, while its power output can be adjusted by control electric current.The output end of laser pumping source 1 passes through tail optical fiber and light
Fiber isolator 2 is connected, and tail optical fiber is connected by welding with the one end of fibre optic isolater 2, and the other end of fibre optic isolater 2 and high reflection cloth
The welding of glug fiber grating 5.
The reflectivity of above-mentioned high reflection bragg grating 5 is 99.99%, and centre wavelength is 1550.02nm, the zone of reflections
A width of 0.29nm, length is 5mm.Low reflection polarization-maintaining type bragg grating 7 is polarization-maintaining type fiber grating, and its reflectivity is
70%, centre wavelength is 1549.98nm, and its reflection bandwidth is 0.02nm, and its effective length length is less than or equal to 100mm.
The Er-doped fiber 6 that the present invention is used is preferably phosphate Er-doped fiber 6.Surpass in the fibre core peak absorbance rate of 1530nm
Cross 200dB/m.Its length is 15mm, a diameter of 12mm.
Driven member in above-mentioned tuner be one piece in cylindrical structure stack piezoelectric ceramics trigger 4 and
Stack piezoelectric ceramics trigger 4 with diameter stainless steel cylinder 3.One end of stack piezoelectric ceramics trigger 4 has one section
Cylindrical projection, can be inserted in stainless steel cylinder 3, and be screwed.Stack piezoelectric ceramics is triggered respectively using viscose glue
Device 4 and stainless steel cylinder 3 are bonded together with Er-doped fiber 6 respectively.The other end of stack piezoelectric ceramics trigger 4 and electricity
Pressure controller is connected, and the collapsing length of piezoelectric ceramics can be adjusted using controller, so as to the length to Er-doped fiber 6 is adjusted
Section, realizes that laser frequency tuning is exported.
The operation principle of patent of the present invention is as follows：The laser that semiconductor laser pumping source 1 sends is by after fibre optic isolater 2
In inciding Er-doped fiber 6 by high reflection bragg grating 5, the absorptive pumping light reflection laser of Er-doped fiber 6, laser exists
Shaken back and forth in the resonator constructed by high reflection bragg grating 5 and low reflection polarization-maintaining type bragg grating 7 from
And constantly amplify so as to be exported through too low reflection polarization-maintaining type bragg grating 7.The present invention is by stack piezoelectric ceramics（PZT）
Trigger 4 binds with Er-doped fiber 6, by the stroke of precise control piezoelectric ceramics come active control laser Er-doped fiber 6
Length, so as to change laser output frequency, realizes tunable.
The present invention is not limited to above-mentioned specific embodiment, and persons skilled in the art are according to disclosed by the invention interior
Hold, can implement of the invention using other various specific embodiments, or it is every using design structure of the invention and think of
Road, does simple change or change, both falls within protection scope of the present invention.
Claims (8)
1. a kind of fine tunable single-frequency short cavity optical fiber laser of frequency, including laser pumping source, optical resonator, tuning dress
Put, the output end connection fibre optic isolater of laser pumping source, fibre optic isolater is connected with the input port of optical resonator, optics
The output port output of resonator is through the laser after optical resonator amplification, it is characterised in that：Fiber resonance cavity includes high reflection
Bragg grating and low reflective Bragg fiber grating, one end and the fibre optic isolater of high reflection bragg grating connect
Connect, the other end of high reflection bragg grating is connected with the input of Er-doped fiber, the output end of Er-doped fiber is anti-with low
Bragg grating connection is penetrated, the output end of low reflective Bragg fiber grating is connected with the output port of optical resonator,
The tuner containing the piezoelectric ceramics trigger including piezoelectric ceramics and position sensor and with piezoelectric ceramics including touching
Hair device is fixedly connected to form the driven member of the matching relationship that is synchronized with the movement with piezoelectric ceramics, the piezoelectric ceramics trigger and is driven
Part is axially installed on Er-doped fiber successively along Er-doped fiber.
2. the fine tunable single-frequency short cavity optical fiber laser of frequency according to claim 1, it is characterised in that：It is described to swash
Optical pumping source uses the semiconductor laser with tail optical fiber, and the semiconductor laser is by tail optical fiber and high reflection bragg grating
Input welding.
3. the fine tunable single-frequency short cavity optical fiber laser of frequency according to claim 1 and 2, it is characterised in that：Institute
The reflectivity for stating high reflection bragg grating is 99.99%.
4. the fine tunable single-frequency short cavity optical fiber laser of frequency according to claim 1-3 any one, its feature
It is：Mixed with gain media in the Er-doped fiber, the gain media is phosphoric acid salt medium.
5. the fine tunable single-frequency short cavity optical fiber laser of frequency according to claim 1-4 any one, its feature
It is：The low reflective Bragg fiber grating uses polarization-maintaining type fiber grating, laser reflectivity to be not less than 70%, and bandwidth is less than
0.02nm。
6. the fine tunable single-frequency short cavity optical fiber laser of frequency according to claim 1-5 any one, its feature
It is：The piezoelectric ceramics trigger is full closed ceramic assembling structure, and the full closed ceramic assembling structure is contained within pressure
Electroceramics and position sensor, the displacement accuracy of the piezoelectric ceramics is Subnano-class.
7. the fine tunable single-frequency short cavity optical fiber laser of frequency according to claim 6, it is characterised in that：The envelope
Enclosed assembling structure is in cylindrical structure, and the cylindrical outer surface is through gluing in Er-doped fiber periphery.
8. the fine tunable single-frequency short cavity optical fiber laser of frequency according to claim 1-7 any one, its feature
It is：The driven member is cylindrical structure, and, through gluing in Er-doped fiber periphery, cylinder one is radially for the cylindrical outer surface
Middle the heart channel of Hang-Shaoyin fastener of end face is connected with a radial end face center of piezoelectric ceramics trigger.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107703498A (en) * | 2017-11-22 | 2018-02-16 | 中国计量大学 | A kind of miniature laser radar |
| CN111509538A (en) * | 2020-03-27 | 2020-08-07 | 中国科学院西安光学精密机械研究所 | Gain-related wavelength-controlled and tunable ultrashort pulse laser generation method and device |
| CN115275750A (en) * | 2022-09-26 | 2022-11-01 | 创昇光电科技(苏州)有限公司 | All-fiber laser |
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| CN202260115U (en) * | 2011-10-28 | 2012-05-30 | 李国玉 | Linearly-tunable short straight cavity optical fiber laser |
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| CN103595292A (en) * | 2013-11-19 | 2014-02-19 | 苏州大学 | Closed-loop-controlled encapsulating piezoelectric ceramic actuator and resistance strain gauge fixing method |
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| CN206506151U (en) * | 2017-01-18 | 2017-09-19 | 浙江工贸职业技术学院 | A kind of fine tunable single-frequency short cavity optical fiber laser of frequency |
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| CN202260115U (en) * | 2011-10-28 | 2012-05-30 | 李国玉 | Linearly-tunable short straight cavity optical fiber laser |
| CN103337778A (en) * | 2013-03-08 | 2013-10-02 | 华南理工大学 | Frequency modulating single frequency fiber laser |
| CN103595292A (en) * | 2013-11-19 | 2014-02-19 | 苏州大学 | Closed-loop-controlled encapsulating piezoelectric ceramic actuator and resistance strain gauge fixing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107703498A (en) * | 2017-11-22 | 2018-02-16 | 中国计量大学 | A kind of miniature laser radar |
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| CN115275750A (en) * | 2022-09-26 | 2022-11-01 | 创昇光电科技(苏州)有限公司 | All-fiber laser |
| CN115275750B (en) * | 2022-09-26 | 2022-12-20 | 创昇光电科技(苏州)有限公司 | All-fiber laser |
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