CN1588222A - Central pumping optical fiber laser and optical fiber amplifier - Google Patents
Central pumping optical fiber laser and optical fiber amplifier Download PDFInfo
- Publication number
- CN1588222A CN1588222A CN 200410053306 CN200410053306A CN1588222A CN 1588222 A CN1588222 A CN 1588222A CN 200410053306 CN200410053306 CN 200410053306 CN 200410053306 A CN200410053306 A CN 200410053306A CN 1588222 A CN1588222 A CN 1588222A
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- optical fiber
- circular column
- ground roll
- pumping
- laser
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 51
- 238000005086 pumping Methods 0.000 title claims abstract description 36
- 239000000835 fiber Substances 0.000 claims abstract description 32
- 239000004065 semiconductor Substances 0.000 claims abstract description 14
- 238000005253 cladding Methods 0.000 claims abstract description 9
- 239000000945 filler Substances 0.000 claims abstract description 5
- 239000011521 glass Substances 0.000 claims abstract description 4
- 239000000126 substance Substances 0.000 claims description 4
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 238000007747 plating Methods 0.000 abstract description 3
- 238000005057 refrigeration Methods 0.000 abstract description 3
- 239000010453 quartz Substances 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
- 239000012141 concentrate Substances 0.000 description 7
- 239000005331 crown glasses (windows) Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241000931526 Acer campestre Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- Optical Couplings Of Light Guides (AREA)
Abstract
A centralized pumping fiber laser and fiber amplifier is characterized in that the structure is as follows: the annular cylindrical waveguide is formed by winding and stacking bare fiber sections of a double-clad fiber only with a doped fiber core and a pure quartz inner cladding in an annular square groove, filling the bare fiber sections with glass filler, and plating a high-reflection layer with high reflection to pump light on the outer surface. The invention improves the system stability, the semiconductor laser does not need refrigeration and optical fiber coupling, the pumping light power is increased, the pumping efficiency is improved, and the output of the optical fiber laser is improved.
Description
Technical field
The present invention relates to laser instrument and laser amplifier, particularly a kind of concentrated pumping optical fiber laser instrument and fiber amplifier.
Background technology
Allowing the doped core of more pump light pumping doubly clad optical fiber, is the important prerequisite that improves fiber laser and output power for fibre amplifier.In the prior art, the laser medium of fiber laser and fiber amplifier adopts the structure of doubly clad optical fiber usually, and method for pumping generally adopts end pumping, promptly from the end face input pumping light of doubly clad optical fiber, " mixes Yb referring to what people such as Wu Zilu delivered
3+The numerical analysis of double-clad optical fiber laser ", " optics journal " the 31st volume, the 3rd phase, 2002.3.Though this double-clad optical fiber laser can be coupled into semiconductor pumped laser the inner cladding of its doubly clad optical fiber more effectively from end face, but need could be coupled into this inner cladding to the high power semi-conductor pumping laser from end face with the lens focus of larger aperture, total system is stable inadequately, has limited the practical application of fiber laser and fiber amplifier.
Summary of the invention
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of concentrated pumping optical fiber laser instrument and fiber amplifier are provided,, improve its output power to improve the compactedness of this system stability and structure.
The principle of the technology of the present invention solution is:
The present invention has broken through the notion of original double-clad optical fiber laser, the doubly clad optical fiber of having dispeled surrounding layer is cast in the circular cylinder waveguide with the k6 crown glass, and plate the high anti-laminated reflective film of pump light at the outside surface of waveguide, the pumping laser that semiconductor laser sends enters in it from the side of circular cylinder waveguide, because the waveguide outside surface is to the high retroaction of pump light, the pump light that enters in the waveguide can be transmitted therein, in the process of transmission, constantly pass through the active fibre core of the doubly clad optical fiber of being peelled off surrounding layer, and absorbed, thereby realize the pumping effect by dopant ion wherein.
Technical solution of the present invention is as follows:
A kind of concentrated pumping optical fiber laser instrument and fiber amplifier, the structure that it is characterized in that it is: a circular column ground roll is led, this circular column ground roll lead be in annular square groove in the bare fibre section that doped core and pure quartzy inner cladding are only arranged of a doubly clad optical fiber reel and to stack and to fill in by glass filler, outside surface is coated with the high anti-high reflection layer of pump light is formed, the two ends that this doubly clad optical fiber is not removed the polymkeric substance surrounding layer are stayed this circular column ground roll and are formed doubly clad optical fiber front end and doubly clad optical fiber rear end outside leading, the outside that this circular column ground roll is led is provided with the inlet of a plurality of pump lights, the outside that its position and circular column ground roll are led is tangent, and semiconductor pump laser is established in the porch of each pump light.
The ring center symmetry that the inlet of described a plurality of pump lights and circular column ground roll are led.
The double-cladding fiber laser output terminal is that front end, Effect of Back-Cavity Mirror place end or seed light upstream end are the doubly clad optical fiber rear end.Wherein the circular cylinder waveguide is made up of doubly clad optical fiber inner cladding and doped core and k6 crown glass filler, can put together the Active Optical Fiber that mixes like this and form a cross-sectional area than the big a lot of pump light transmission waveguide of doubly clad optical fiber, high power semiconductor lasers need not pass through beam shaping, and directly the side from the cylinder waveguide enters in the waveguide.
The present invention has greatly enlarged the transmission waveguide of pump light, makes the high power semi-conductor pumping laser be easy to implement pumping effect to doped core, produces high power laser light.The present invention simultaneously can also adopt many semiconductor lasers that must not freeze to carry out pumping from a plurality of positions of disc waveguide side, and the structure of fiber laser and fiber amplifier is greatly simplified.
The present invention concentrates pumping by the doped fiber of having dispeled surrounding layer is cast in a circular column ground roll with the k6 crown glass in leading, and can avoid the instability of the double-clad optical fiber laser of end pumping effectively, the raising system stability; In the present invention simultaneously can be coupled into pumping laser at a plurality of positions that the circular column ground roll is led the side wherein, and these semiconductor lasers do not need refrigeration and optical fiber coupling, increase pumping light power, improved pumping efficiency, thereby improved the output power of double-clad optical fiber laser.
The present invention is further illustrated below in conjunction with accompanying drawing and embodiment.
Description of drawings
Fig. 1 concentrates the structural representation of pumping optical fiber laser instrument and amplifier for the present invention.
The cross sectional representation that Fig. 2 concentrates the circular column ground roll of pumping optical fiber laser instrument and amplifier to lead for the present invention
Embodiment
See also Fig. 1 and Fig. 2 earlier, Fig. 1 concentrates the structural representation of pumping optical fiber laser instrument and amplifier for the present invention.As seen from Figure 1, the present invention concentrates the structure of pumping optical fiber laser instrument and amplifier to be: a circular column waveguide 1, this circular column ground roll lead 1 be in annular square groove in the bare fibre section that doped core 11 and pure quartzy inner cladding 12 are only arranged of a doubly clad optical fiber reel and to stack and to fill in by glass filler 13, outside surface is coated with the high anti-high reflection layer 15 of pump light is formed, the two ends that this doubly clad optical fiber is not removed the polymkeric substance surrounding layer are stayed this circular column ground roll and are led and form doubly clad optical fiber front end 3 and doubly clad optical fiber rear end 4 outside 1, this circular column ground roll is led the inlet 14 that 1 the outside is provided with a plurality of pump lights, it is tangent that its position and circular column ground roll are led 1 the outside, and inlet 14 places of each pump light establish semiconductor pump laser 2.
The inlet 14 and the circular column ground roll of described a plurality of pump lights are led 1 ring center symmetry.
The relation of each parts is: the pump light that semiconductor laser 2 sends enters the circular column ground roll through pump light entrance port 14 and leads in 1, because of the reflex of high reflection layer 15 is able to lead transmission in 1 at the circular column ground roll, constantly pass through simultaneously doped core 11, and absorbed by dopant ion wherein, realize the pumping effect.
Be a specific embodiment below:
To get a length and be 40m, inner cladding diameter be 0.4mm, mix Yb
3+Ion, core diameter are the doubly clad optical fiber of 9 μ m, corrode its polymkeric substance surrounding layer with strong acid, remaining bare fibre, heat bare fibre at a distance with oxyhydrogen flame then, make it can only be crooked and can not melt, bare fibre is wound on an inner and outer diameter is respectively in the annular square groove of 12.5cm and 13cm, square groove is transversal section 0.5*0.5cm
2The steel die of square, interior smooth has the inlet of four pump lights in the outside of square groove, its position is for ring center symmetry and tangent with the outside of ring.Adopt the k6 crown glass to pour into a mould then, because quartzy fusing point is 2100 ℃, and the k6 crown glass can be cast in the time of 850 ℃, and it is more that temperature differs, and can not impact optical fiber during casting.Plating the surface of the good circular cylinder of cast wavelength then is the high anti-reflectance coating of 976nm pump light, and two end faces of the inlet of pump light and optical fiber are all exempted from plating.Be that 5W, output wavelength are that the semiconductor laser of 976nm carries out pumping to the doped fiber in the circular cylinder with four output powers at last.When the laser instrument, after polishing, sticks the rear end face of optical fiber the high anti-reflectance coating of optical maser wavelength 1110nm as Effect of Back-Cavity Mirror, and the front end face of optical fiber polishes as front cavity mirror; During as amplifier, seed light enters the fibre core of doping from the rear end face of optical fiber, and laser is exported from front end face.
In sum, the present invention concentrates pumping by the doped fiber of having dispeled surrounding layer is cast in a circular column ground roll with the k6 crown glass in leading, and can avoid the instability of the double-clad optical fiber laser of end pumping effectively, the raising system stability.
In the present invention simultaneously can be coupled into pumping laser at a plurality of positions that the circular column ground roll is led the side wherein, and these semiconductor lasers do not need refrigeration and optical fiber coupling, increase pumping light power, improved pumping efficiency, thereby improved the output power of double-clad optical fiber laser.
Claims (2)
1, a kind of concentrated pumping optical fiber laser instrument and fiber amplifier, the structure that it is characterized in that it is: a circular column ground roll is led (1), this circular column ground roll lead (1) be in annular square groove in the bare fibre section that doped core (11) and pure quartzy inner cladding (12) are only arranged of a doubly clad optical fiber reel and to stack and to fill in by glass filler (13), outside surface is coated with the high anti-high reflection layer (15) of pump light is formed, the two ends that this doubly clad optical fiber is not removed the polymkeric substance surrounding layer are stayed this circular column ground roll and are led and form doubly clad optical fiber front end (3) and doubly clad optical fiber rear end (4) outside (1), the outside that this circular column ground roll is led (1) is provided with the inlet (14) of a plurality of pump lights, it is tangent that its position and circular column ground roll are led the outside of (1), and the inlet of each pump light (14) locates to establish semiconductor pump laser (2).
2, concentrated pumping optical fiber laser instrument according to claim 1 and fiber amplifier is characterized in that the inlet (14) of described a plurality of pump lights and circular column ground roll lead the ring center symmetry of (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410053306 CN1588222A (en) | 2004-07-30 | 2004-07-30 | Central pumping optical fiber laser and optical fiber amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410053306 CN1588222A (en) | 2004-07-30 | 2004-07-30 | Central pumping optical fiber laser and optical fiber amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1588222A true CN1588222A (en) | 2005-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410053306 Pending CN1588222A (en) | 2004-07-30 | 2004-07-30 | Central pumping optical fiber laser and optical fiber amplifier |
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| CN (1) | CN1588222A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931576A (en) * | 2012-11-13 | 2013-02-13 | 广东高聚激光有限公司 | High-power fiber laser |
| CN103091779A (en) * | 2011-11-08 | 2013-05-08 | 福州高意通讯有限公司 | High-power optical fiber coupler and manufacture method thereof |
-
2004
- 2004-07-30 CN CN 200410053306 patent/CN1588222A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103091779A (en) * | 2011-11-08 | 2013-05-08 | 福州高意通讯有限公司 | High-power optical fiber coupler and manufacture method thereof |
| CN102931576A (en) * | 2012-11-13 | 2013-02-13 | 广东高聚激光有限公司 | High-power fiber laser |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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