CN1270417C - Large core diameter optical fiber laser - Google Patents
Large core diameter optical fiber laser Download PDFInfo
- Publication number
- CN1270417C CN1270417C CN 200410016478 CN200410016478A CN1270417C CN 1270417 C CN1270417 C CN 1270417C CN 200410016478 CN200410016478 CN 200410016478 CN 200410016478 A CN200410016478 A CN 200410016478A CN 1270417 C CN1270417 C CN 1270417C
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- Prior art keywords
- laser
- spherical shell
- diameter
- pump light
- optical fiber
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 21
- 230000008878 coupling Effects 0.000 claims abstract description 13
- 238000010168 coupling process Methods 0.000 claims abstract description 13
- 238000005859 coupling reaction Methods 0.000 claims abstract description 13
- 238000002310 reflectometry Methods 0.000 claims abstract description 4
- 230000003287 optical effect Effects 0.000 claims description 3
- 241000931526 Acer campestre Species 0.000 claims 2
- 239000000835 fiber Substances 0.000 abstract description 8
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229940085805 fiberall Drugs 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Laser Surgery Devices (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Lasers (AREA)
Abstract
A large-core optical fiber laser comprises a laser resonant cavity and a pump light source, and is characterized in that the laser resonant cavity comprises a concentric spherical shell reflector and an output coupling mirror, and two end faces of an optical fiber are both provided withCoated with the wavelength λ of the laserLOne end face of the antireflection film is arranged at the spherical center of the concentric spherical shell-shaped reflector, the other end face is tightly attached to the output coupling mirror, and the outer layer of the concentric spherical shell is coated with the wavelength lambda of the pump lightpAn anti-reflection film, an inner layer coated with a laser wavelength λ within a diameter dLThe area outside the area with the diameter d is coated with the wavelength lambda of the pump lightpThe area of the diameter d of the antireflection film is 1-3% of the spherical shell area of the concentric spherical shell reflector, and the output coupling mirror is used for coupling laser wavelength lambdaLPartial reflection with reflectivity of 4-10%, and the pump light source arranged at the central axis position outside the concentric spherical shell-shaped reflector. The invention can not only improve the laser output power, but also obtain single-mode or low-order mode laser output under the condition of large fiber core.
Description
Technical field
The present invention relates to fiber laser, particularly a kind of large core diameter optical fiber laser.
Technical background
The optical fiber of using always in the general optical communication, for keeping its single mode output, require fibre core less than 10 μ m, the fiber laser power output made from this optical fiber is limited in the hectowatt magnitude, for further improving laser power, need to strengthen the diameter of fiber cores, but dilated diameter can make the optical-fiber laser beam quality descend, can not be at single mode operation.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiency of above-mentioned technology formerly, and a kind of large core diameter optical fiber laser is provided, and to improve laser output power, can obtain single mode or low-mode laser output again under big fibre core.
Technical solution of the present invention is as follows:
A kind of large core diameter optical fiber laser comprises laserresonator and pump light source, is characterized in that its laserresonator is made up of a homocentric sphere hull shape speculum and an output coupling mirror, and the both ends of the surface of an optical fiber all scribble laser wavelength lambda
LAnti-reflection film, an one end face places the sphere center position of this homocentric sphere hull shape speculum, and other end and output coupling mirror fit tightly, and the skin of this concentric spherical shell scribbles the pump light wavelength X
PAnti-reflection film, internal layer scribbles laser wavelength lambda in diameter is the scope of d
LTotal reflection film, this diameter is the outer pump light wavelength X that scribbles in the zone of d
PAnti-reflection film, diameter are that the area of d is the 1--3% of homocentric sphere hull shape speculum spherical shell area, and output coupling mirror is to laser wavelength lambda
LPartial reflection, reflectivity are between 4%-10%, and the middle shaft position outside homocentric sphere hull shape speculum is provided with a pump light source.
Described diameter is that the best area of d is 2% of this homocentric sphere hull shape speculum spherical shell area.
Technique effect of the present invention:
Large core diameter optical fiber laser of the present invention because its structure makes the light beam in the fiber laser be limited in the θ angular region, thereby has guaranteed single mode or low-order mode output.
Description of drawings
Fig. 1 is the structural representation of large core diameter optical fiber laser of the present invention
Embodiment:
See also Fig. 1 earlier, the structural representation of Fig. 1 large core diameter optical fiber laser of the present invention, as seen from the figure, large core diameter optical fiber laser of the present invention, it is made up of laserresonator and pump light source, laserresonator is made up of a homocentric sphere hull shape speculum 1 and an output coupling mirror 4, and the both ends of the surface of an optical fiber 2 scribble laser wavelength lambda
LAnti-reflection film, an one end face places the sphere center position of this homocentric sphere hull shape speculum 1, and other end and output coupling mirror 4 fit tightly, and the skin of this concentric spherical shell 1 scribbles the pump light wavelength X
PAnti-reflection film, internal layer scribbles laser wavelength lambda in diameter is the scope of d
LTotal reflection film, diameter is the outer pump light wavelength X that scribbles in the zone of d
PAnti-reflection film, diameter are that the area of d is the 1--3% of homocentric sphere hull shape speculum 1 spherical shell area, 4 pairs of laser wavelength lambda of output coupling mirror
LPartial reflection, reflectivity are between 4%-10%, and the middle shaft position outside homocentric sphere hull shape speculum 1 is provided with this pump light source 3.
Fig. 1 also is the structural representation of the most preferred embodiment of large core diameter optical fiber laser of the present invention, spherical shell radius R=the 30mm of homocentric sphere hull shape speculum 1 wherein, diameter d is 1mm, the described diameter in θ=0.33 is that the area of d is 2% of this homocentric sphere hull shape speculum 1 spherical shell area, the footpath experimental results show that, the present invention can be applicable to the large core fiber that the optical fiber core diameter is 30 μ m, obtains single mode output.
Claims (2)
1, a kind of large core diameter optical fiber laser comprises laserresonator and pump light source, it is characterized in that laserresonator is made up of homocentric sphere hull shape speculum (1) and output coupling mirror (4), and it is λ that the both ends of the surface of optical fiber (2) scribble optical maser wavelength
LAnti-reflection film, an one end face places the sphere center position of this homocentric sphere hull shape speculum (1), other end and output coupling mirror (4) fit tightly, it is λ that the skin of this concentric spherical shell (1) scribbles the pump light wavelength
PAnti-reflection film, internal layer, scribbling optical maser wavelength in diameter is the scope of d is λ
LTotal reflection film, diameter is that outer to scribble the pump light wavelength be λ in the zone of d
PAnti-reflection film, diameter is that the area of d is the 1-3% of this homocentric sphere hull shape speculum (1) spherical shell area, output coupling mirror (4) is to laser wavelength lambda
LPartial reflection, reflectivity are between 4%-10%, and the middle shaft position outside homocentric sphere hull shape speculum (1) is provided with a pump light source (3).
2, large core diameter optical fiber laser according to claim 1, it is characterized in that described diameter be d area for this homocentric sphere hull shape speculum (1) spherical shell area 2%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410016478 CN1270417C (en) | 2004-02-23 | 2004-02-23 | Large core diameter optical fiber laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410016478 CN1270417C (en) | 2004-02-23 | 2004-02-23 | Large core diameter optical fiber laser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1560966A CN1560966A (en) | 2005-01-05 |
| CN1270417C true CN1270417C (en) | 2006-08-16 |
Family
ID=34440499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410016478 Expired - Lifetime CN1270417C (en) | 2004-02-23 | 2004-02-23 | Large core diameter optical fiber laser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1270417C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100442133C (en) * | 2006-08-11 | 2008-12-10 | 中国科学院上海光学精密机械研究所 | Laser beam pattern control device |
-
2004
- 2004-02-23 CN CN 200410016478 patent/CN1270417C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1560966A (en) | 2005-01-05 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20161227 Address after: 210038 Nanjing economic and Technological Development Zone, Jiangsu Road, No. 19 Patentee after: NANJING ZHONGKE SHENGUANG TECHNOLOGY Co.,Ltd. Address before: 201800 Shanghai 800-211 post office box Patentee before: SHANGHAI INSTITUTE OF OPTICS AND FINE MECHANICS CHINESE ACADEMY OF SCIENCES |
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| CX01 | Expiry of patent term |
Granted publication date: 20060816 |
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| CX01 | Expiry of patent term |