CN102185238B - Large effective area single mode fiber amplifier by changing cladding refractive index profile - Google Patents
Large effective area single mode fiber amplifier by changing cladding refractive index profile Download PDFInfo
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- CN102185238B CN102185238B CN2011100820897A CN201110082089A CN102185238B CN 102185238 B CN102185238 B CN 102185238B CN 2011100820897 A CN2011100820897 A CN 2011100820897A CN 201110082089 A CN201110082089 A CN 201110082089A CN 102185238 B CN102185238 B CN 102185238B
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- refractive index
- microns
- optical fiber
- cladding
- fiber amplifier
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- 239000000835 fiber Substances 0.000 title claims abstract description 56
- 238000005253 cladding Methods 0.000 title claims abstract description 29
- 239000013307 optical fiber Substances 0.000 claims abstract description 34
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000010453 quartz Substances 0.000 claims abstract description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000005086 pumping Methods 0.000 claims description 19
- 230000004323 axial length Effects 0.000 claims description 13
- 238000005530 etching Methods 0.000 claims 1
- 238000004891 communication Methods 0.000 abstract description 5
- 230000003321 amplification Effects 0.000 abstract description 4
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 2
- 230000009022 nonlinear effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
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Abstract
本发明公开了通过改变包层折射率分布的大有效面积单模光纤放大器，适用于光纤通信领域。为了克服已有的光纤放大器在单模和大功率不能兼得的问题，通过改变放大器中光纤的包层折射率分布情况，以达到改变纤芯中传输激光模式，实现单模情况下的大模场面积信号放大。具体实施为用氢氟酸溶液腐蚀掉光纤的包层(2)，以折射率大于包层(2)的折射率小于纤芯(1)的折射率的石英填充，形成填充区(4)。填充区的形状为D形、环形、矩形和螺旋式缠绕。该光纤放大器用于光纤通信中激光信号的大功率放大。
The present invention discloses a single-mode optical fiber amplifier with a large effective area, which is suitable for the field of optical fiber communication by changing the distribution of the cladding refractive index. In order to overcome the problem that the existing optical fiber amplifier cannot have both single mode and high power, the distribution of the cladding refractive index of the optical fiber in the amplifier is changed to change the transmission laser mode in the fiber core, so as to achieve large mode field area signal amplification under single mode. The specific implementation is to etch the cladding (2) of the optical fiber with a hydrofluoric acid solution, and fill it with quartz with a refractive index greater than the refractive index of the cladding (2) and less than the refractive index of the core (1) to form a filling area (4). The shape of the filling area is D-shaped, annular, rectangular and spirally wound. The optical fiber amplifier is used for high-power amplification of laser signals in optical fiber communication.
Description
Technical field
The present invention relates to a kind of large effective area monomode fiber amplifier, be applicable to optical fiber communication.
Background technology
The appearance of fiber amplifier makes optical fiber communication can aspect high-power, remote, without electronic relay, accomplish the advantage that the conversion of the light-electricity-light of electric relaying can't be accomplished.Fiber amplifier amplifies with its excellent signal and the transparency of light path has obtained approval widely; Development along with technology; The multiplication factor of fiber amplifier is increasing; The high magnification fiber amplifier is in the application paid more and more attention in fields such as optical fiber communication, national defence and sensing, and its application fields makes people increasing to the input of fiber amplifier.Though the high enlargement ratio of fiber amplifier has had certain achievement in some experiments, can export the powerful fiber amplifier of single mode and also have certain restriction.At first a reason is that the power that can bear in the unit volume in the fiber amplifier chamber is conditional; The laser power that surpasses the power threshold output of bearing is difficult to continue to increase; Thereby be difficult to obtain the signal amplification of high enlargement ratio; Another one is the effect of nonlinear effect, and two kinds of factors all can make the beam quality rapid deterioration of the flashlight after the amplification of output.And if obtain single mode and beam quality fiber amplifier preferably, power improves makes structure become complicated, beam quality control difficulty, inefficiency.
Summary of the invention
In order to overcome existing fiber amplifier in single mode and the high-power problem that can not get both, the present invention provides through changing the large effective area monomode fiber amplifier that cladding index distributes.
Technical scheme of the present invention is:
Through changing the large effective area monomode fiber amplifier that cladding index distributes, this amplifier comprises: optical fiber and pumping source.
Erode the covering of optical fiber with hydrofluoric acid solution, fill less than the quartz of the refractive index of fibre core greater than the refractive index of covering, form fill area with refractive index.
The radius of described fibre core is 8 microns to 100 microns, and the thickness of covering is 50 microns to 100 microns, and the axial length of fill area is 1 millimeter to 10 millimeters.
Described fill area be shaped as D shape, its action is 10 microns to 70 microns.
Described fill area is the spiral rectangular channel, and groove width is 10 microns, and 100 microns of pitch, groove depth are the thickness of covering.
Described fill area is a ring-type, and its axial length is the covering of whole optical fiber of 1 millimeter to 10 millimeters.
Described fill area is a rectangular channel, and the axial length of rectangular channel is 10 millimeters, and groove width is 10 microns, is 60 microns deeply.
The quantity of described fill area is one or two.
The present invention compares the beneficial effect that is had with prior art:
Since the present invention adopt fiber core radius be 5 microns to 100 micron fiber; Increased the sectional area of amplifier gain; Thereby reduced the maximum unit summation watt rating in the optical fiber, reduced loss, under the situation of equal gross output; More difficult generation nonlinear effect, thus the gross power that can make output with the increase of fiber core radius linear the increase.Because the material of optical fiber middle part subcontract layer is changed, and makes refractive index more near fibre core, thereby has reduced the normalized frequency of optical fiber, can realize under the bigger situation of fiber core radius that single mode amplifies output.
Description of drawings
Fig. 1 fill area is the large effective area monomode fiber amplifier that passes through to change the cladding index distribution of annular.
Fig. 2 is the sectional view of Fig. 1 along A-A.
Fig. 3 fill area is the large effective area monomode fiber amplifier that passes through to change the cladding index distribution of D shape.
Fig. 4 is that Fig. 3 is along the B-B sectional view.
Fig. 5 fill area is the large effective area monomode fiber amplifier that passes through to change the cladding index distribution of spiral rectangular channel.
Fig. 6 fill area is the large effective area monomode fiber amplifier that passes through to change the cladding index distribution of rectangular channel.
Fig. 7 is the sectional view of the C-C of Fig. 6.
Fig. 8 fill area is the large effective area monomode fiber amplifier that passes through to change the cladding index distribution of two cannelures.
Fig. 9 fill area is the large effective area monomode fiber amplifier that passes through to change the cladding index distribution of two D shape grooves.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
Execution mode one
Through changing the large effective area monomode fiber amplifier that cladding index distributes, like Fig. 1, shown in 2.This amplifier comprises: optical fiber and pumping source 3.
The refractive index of the fibre core 1 of optical fiber is 1.6, and the refractive index of covering 2 is 1.4.
Using hydrofluoric acid solution to erode axial length is 1 millimeter annulus, and the thickness of ring is 50 microns, is that 1.5 quartz is filled with refractive index, forms fill area 4.
The radius of described fibre core 1 is 8 microns, and the thickness of covering 2 is 50 microns, and the axial length of fill area 4 is 1 millimeter.
3 pairs of described fiber end face pumpings of pumping source.
Execution mode two
Fill area is the large effective area monomode fiber amplifier that passes through to change the cladding index distribution of D shape, like Fig. 3, shown in 4.This amplifier comprises: optical fiber and pumping source 3.
The refractive index of the fibre core 1 of optical fiber is 1.9, and the refractive index of covering 2 is 1.7.
Erode with hydrofluoric acid solution and to be shaped as D shape, action is 10 microns, and axial length is 10 millimeters, is that 1.8 quartz is filled with refractive index, forms fill area 4.
The radius of described fibre core 1 is 100 microns, and the thickness of covering 2 is 100 microns.
3 pairs of described optical fiber side-pumpings of pumping source.
Execution mode three
Fill area is the large effective area monomode fiber amplifier that passes through to change the cladding index distribution of spiral rectangular channel, and is as shown in Figure 5.This amplifier comprises: optical fiber and pumping source 3.
The refractive index of the fibre core 1 of optical fiber is 1.8, and the refractive index of covering 2 is 1.6.
Use hydrofluoric acid solution to erode fill area 4 and be the spiral rectangular channel, groove width is 10 microns, and 100 microns of pitch, groove depth are the thickness of covering 2, is that 1.7 quartz is filled with refractive index, forms fill area 4.
The radius of described fibre core 1 is 50 microns, and the thickness of covering 2 is 80 microns.
3 pairs of described fiber end face pumpings of pumping source.
Execution mode four
Fill area is the large effective area monomode fiber amplifier that passes through to change the cladding index distribution of rectangular channel, like Fig. 6, shown in 7.This amplifier comprises: optical fiber and pumping source 3.
The refractive index of the fibre core 1 of optical fiber is 1.8, and the refractive index of covering 2 is 1.6.
Use hydrofluoric acid solution to erode fill area 4 and be rectangular channel, the axial length of rectangular channel is 10 millimeters, and groove width is 10 microns, is 60 microns deeply, is that 1.7 quartz is filled with refractive index, forms fill area 4.
The radius of described fibre core 1 is 8 microns, and the thickness of covering 2 is 70 microns.
3 pairs of described fiber end faces of pumping source and profile pump.
Execution mode five
Fill area is the large effective area monomode fiber amplifier that passes through to change the cladding index distribution of two cannelures, and is as shown in Figure 8.This amplifier comprises: optical fiber and pumping source 3.
The refractive index of the fibre core 1 of optical fiber is 1.6, and the refractive index of covering 2 is 1.4.
Erode first fill area 41 and second fill area 42 is annular with hydrofluoric acid solution, the axial lengths of two annulars are 5 millimeters, are 70 microns deeply, are that 1.5 quartz is filled with refractive index.
The radius of described fibre core 1 is 10 microns, and the thickness of covering 2 is 70 microns.
3 pairs of described optical fiber side-pumpings of pumping source.
Execution mode six
Fill area is the large effective area monomode fiber amplifier that passes through to change the cladding index distribution of two D shape grooves, and is as shown in Figure 9.This amplifier comprises: optical fiber and pumping source 3.
The refractive index of the fibre core 1 of optical fiber is 1.6, and the refractive index of covering 2 is 1.4.
The radius of described fibre core 1 is 10 microns, and the thickness of covering 2 is 70 microns.
3 pairs of described optical fiber side-pumpings of pumping source.
Claims (5)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100820897A CN102185238B (en) | 2011-04-01 | 2011-04-01 | Large effective area single mode fiber amplifier by changing cladding refractive index profile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100820897A CN102185238B (en) | 2011-04-01 | 2011-04-01 | Large effective area single mode fiber amplifier by changing cladding refractive index profile |
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| Publication Number | Publication Date |
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| CN102185238A CN102185238A (en) | 2011-09-14 |
| CN102185238B true CN102185238B (en) | 2012-05-23 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5121460A (en) * | 1991-01-31 | 1992-06-09 | The Charles Stark Draper Lab., Inc. | High-power mode-selective optical fiber laser |
| US5412745A (en) * | 1994-05-05 | 1995-05-02 | Corning Incorporated | Fiber optic coupler exhibiting low nonadiabatic loss |
| CN1165306A (en) * | 1996-02-12 | 1997-11-19 | 康宁股份有限公司 | Single mode optical waveguide having large effective area |
| US5715346A (en) * | 1995-12-15 | 1998-02-03 | Corning Incorporated | Large effective area single mode optical waveguide |
| CN101409421A (en) * | 2008-11-20 | 2009-04-15 | 北京交通大学 | Single-mode operated large mold field area multi-mode optical fiber laser |
| CN201314957Y (en) * | 2008-11-13 | 2009-09-23 | 富通集团有限公司 | Improved non-zero dispersion shifted single-mode fiber with large mode field distribution |
-
2011
- 2011-04-01 CN CN2011100820897A patent/CN102185238B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5121460A (en) * | 1991-01-31 | 1992-06-09 | The Charles Stark Draper Lab., Inc. | High-power mode-selective optical fiber laser |
| US5412745A (en) * | 1994-05-05 | 1995-05-02 | Corning Incorporated | Fiber optic coupler exhibiting low nonadiabatic loss |
| US5715346A (en) * | 1995-12-15 | 1998-02-03 | Corning Incorporated | Large effective area single mode optical waveguide |
| CN1165306A (en) * | 1996-02-12 | 1997-11-19 | 康宁股份有限公司 | Single mode optical waveguide having large effective area |
| CN201314957Y (en) * | 2008-11-13 | 2009-09-23 | 富通集团有限公司 | Improved non-zero dispersion shifted single-mode fiber with large mode field distribution |
| CN101409421A (en) * | 2008-11-20 | 2009-04-15 | 北京交通大学 | Single-mode operated large mold field area multi-mode optical fiber laser |
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| CN102185238A (en) | 2011-09-14 |
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