CN104917040B - A kind of annular multi-wavelength light fiber amplifier - Google Patents
A kind of annular multi-wavelength light fiber amplifier Download PDFInfo
- Publication number
- CN104917040B CN104917040B CN201510309298.9A CN201510309298A CN104917040B CN 104917040 B CN104917040 B CN 104917040B CN 201510309298 A CN201510309298 A CN 201510309298A CN 104917040 B CN104917040 B CN 104917040B
- Authority
- CN
- China
- Prior art keywords
- laser
- mirror
- dichroic mirror
- lens
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention provides a kind of annular multi-wavelength light fiber amplifier, the amplifier is used for light beam coupling or the lens of collimation and four pieces of dichroic mirrors comprising a polarization-maintaining gain fibre, two.Transmission direction is changed after the laser of different wave length passes through the selective dichroic mirror of reflectivity vs. wavelength, and beam of laser output is finally synthesized after the amplification of same root gain fibre.The present invention has the advantages of compact-sized, optical conversion efficiencies are high, cost is cheap, can significantly lift the brightness of output laser.
Description
Technical field
The present invention relates to a kind of optical fibre ring amplifier, is mainly used in amplifying the laser of multiple wavelength, improves system output
The brightness of laser, it is adapted in high power, miniaturization laser field application.
Background technology
With the development of science and technology with the growth of national economy, industry manufacture and military defense field, to laser system
The brightness of system proposes higher and higher requirement.Optical fiber laser has good beam quality, high conversion efficiency, compact-sized and radiating
The features such as ability is strong, it is widely applied in high brightness laser field.
But in the case of high power, the optical fiber laser of single wavelength is limited to nonlinear effect, it is difficult to further carries
Rise brightness.It has been proposed that kinds of schemes is limited to solve the problems, such as optical fiber laser output laser brightness.Such as by shortening light
Fine length, increase optical fiber, special waveguiding structure is designed to suppress the nonlinear effect in optical fiber.But this method is current only
Make exploratory development in the lab, engineering practicability is not also high.Again for example, using optics coherence tomography method by multiple optical fiber lasers
Output laser be superimposed and highlight.But a part of laser energy can be wasted on interference secondary lobe by this method, and
And systems bulky, light path is complicated, is easily disturbed by environmental factor.For another example, dispersion element can be used by multiple ripples
Long laser is merged into a branch of, that is, so-called Spectral beam combining method.But the luminance raising of this method is limited to dispersion
The damage threshold of element, and same volume is more huge, influences practicality.
The content of the invention
It is an object of the invention to overcome the above-mentioned problems of the prior art, pass through the group of various dichroic mirrors and lens
Close, the laser of two to four wavelength and coupling pump light are entered in an optical fiber and are amplified, forms an annular multi-wavelength
Fiber amplifier, nonlinear effect threshold value can be improved, the output brightness of laser system is substantially improved, while more ripples can be reduced
Device required for long amplification, has the advantages of compact-sized, cost is cheap, and optical conversion efficiencies are high.
The technology of the present invention solution is as follows：
A kind of annular multi-wavelength light fiber amplifier, including positive coupling mirror, input dichroic mirror, positive lens, gain fibre,
Reverse coupled mirror, output dichroic mirror and inverted lens；
Beam of laser reflects by positive coupling mirror, input dichroic mirror transmission, is coupled into by positive lens focus
And by gain fibre, the beams extended by lens collimation is reversed, is exported after output dichroic mirror reflection；Second beam laser is by reverse
Coupling mirror reflects, output dichroic mirror transmission, then is focused on and be coupled into and by polarization-maintaining gain fibre by inverted lens, positive
The beams extended by lens collimates, and is exported again after output dichroic mirror transmission by the reflection of input dichroic mirror.Pump light divides two-way, all the way according to
It is secondary that described polarization-maintaining gain fibre is entered by described positive coupling mirror, input dichroic mirror, positive Lens Coupling, another way according to
It is secondary to be coupled into described polarization-maintaining gain fibre by reverse coupled mirror, output dichroic mirror and inverted lens.
Described beam of laser is that parallel collimation is propagated, and can be made up of a kind of linearly polarized laser, can also be by two
The linearly polarized laser composition that kind wavelength is different and polarization direction is orthogonal.
The second described beam laser is that parallel collimation is propagated, and can be made up of a kind of linearly polarized laser, can also be by two
The linearly polarized laser composition that kind wavelength is different and polarization direction is orthogonal.
Described beam of laser and the second described beam optical maser wavelength differ.
Preferably, described positive coupling mirror is more than 90% to described pumping light transmission rate, to described first
Beam laser reflectivity is more than 50%, is so beneficial to beam of laser and pump light effectively transmits in device.
Preferably, described input dichroic mirror is more than 90% to described pumping light transmission rate, to described first
Beam laser transmittance is more than 50%, is more than 50% to the second described beam laser reflectivity, is so beneficial to beam of laser, second
Shu Jiguang and pump light effectively transmit in device.
Preferably, described reverse coupled mirror is more than 90% to described pumping light transmission rate, to described second
Beam laser reflectivity is more than 50%, is so beneficial to the second beam laser and pump light effectively transmits in device.
Preferably, described output dichroic mirror is more than 90% to described pumping light transmission rate, to described second
Beam laser transmittance is more than 50%, is more than 50% to the first described beam laser reflectivity, is so beneficial to beam of laser, second
Shu Jiguang and pump light effectively transmit in device.
Preferably, absorption of the described polarization-maintaining gain fibre to pump light is more than 10dB, to beam of laser and
The transmission loss of two beam laser is less than 1dB, it is ensured that laser can realize that high power amplifies.
The technique effect of the present invention：
The laser gain spectral coverage of the gain fibre of a piece doping with rare-earth ions is non-constant width in fact, multiple different wave lengths
After laser enters gain fibre, as long as wavelength interval keeps sufficiently large or polarization direction orthogonal, pump light can be each extracted,
Amplification is completed in gain fibre.The present invention is high to the laser reflectivity of a certain wavelength using dichroic mirror, to another ripple
The characteristics of long laser transmissivity is high, can be different by multi beam wavelength, and the different laser UNICOM pump light of incident direction leads to together
The mode for crossing Space Coupling is coupled into same root gain fibre, realizes that a gain fibre amplifies the laser of multiple wavelength, carries
The effect of high whole laser system output laser brightness.Compared with prior art, the present invention is compact-sized, and cost is cheap, can be with
Amplify while realizing multiple wavelength and aperture output altogether, raising export the brightness of laser.
Brief description of the drawings
Fig. 1 is the structural representation of the annular multi-wavelength light fiber amplifier of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in each embodiment of invention described below
Conflict can is not formed each other to be mutually combined.
First referring to Fig. 1, Fig. 1 is the structural representation of annular multi-wavelength light fiber amplifier.
Positive coupling mirror 2 be coated with 1050nm~1070nm wave bands highly reflecting films and 960nm~980nm wave bands it is highly transmissive
Film, placed with optical axis in 45° angle；Input dichroic mirror 3 is coated with the highly transmissive film of 960nm~980nm wave bands, 1050nm~1070nm
The highly reflecting films of highly transmissive film and 1070nm~1090nm wave band of wave band, placed with optical axis in 45° angle；Reverse coupled mirror 7 plates
There are 1070nm~1090nm highly reflecting films and 960nm~980nm highly transmissive film, placed with optical axis in 45° angle；Export double-colored
Mirror 8 is coated with the highly transmissive film of 1960nm~980nm wave bands, and the highly reflecting films and 1070nm of 1050nm~1070nm wave bands~
The highly transmissive film of 1090nm wave bands, placed with optical axis in 45° angle；Positive lens 4 and inverted lens 9 are the convex of focal length 500mm
Lens, it is coated with the highly transmissive film of 960nm~980nm wave bands, 1040nm~1100nm wave bands.
Two beam center wavelength are 976nm, and power is that 1000W pump light 10 is anti-by positive coupling mirror 2, input respectively
Penetrate mirror 3 and reverse coupled mirror 7, the transmission of output reflector 8, then coupling after the focusing by positive lens 4 and inverted lens 9 respectively
Conjunction enters one section of polarization-maintaining gain fibre 5,5 long 10m of the polarization-maintaining gain fibre, 20 μm of core diameter, and 400 μm of inner cladding diameter is right
The absorption coefficient of 976nm light is 1.5dB/m.
The s directions polarization of equidirectional parallel collimation transmission, the laser and p directions polarization, wavelength that wavelength is 1060nm are
1065nm laser forms the first beam laser 1, general power 20W, launches after positive coupling mirror 2, then by input
The transmission of speculum 3 and positive lens 4 are coupled into one end of polarization-maintaining gain fibre 5 after focusing on, brought out after amplification from another
Penetrate, collimated by inverted lens 9, be output after dichroic mirror 8 reflects and export, power output reaches 800W.
The s directions polarization of equidirectional parallel collimation transmission, the laser and p directions polarization, wavelength that wavelength is 1075nm are
1080nm laser forms the second beam laser (6), general power 20W, launches after reverse coupled mirror 7, then by defeated
Go out after the transmission of speculum 8 focuses on inverted lens 9 to be coupled into one end of polarization-maintaining gain fibre 5, from the other end after amplification
Outgoing, is collimated by positive lens 4, is transfused to after dichroic mirror 3 reflects by the output transmission output of dichroic mirror 8, output
Power reaches 800W.
Two beam laser synthesize beam of laser (laser for including four wavelength) after amplifying by polarization-maintaining gain fibre 5,
General power reaches 1600W, and does not observe harmful nonlinear effect.
The embodiment shows that the present invention can use an optical fiber while amplify the ability of the laser of multiple wavelength, and
Nonlinear effect threshold value, the output brightness of improving laser system can be effectively improved, while can be reduced needed for multi-wavelength amplification
The device wanted, there is the advantages that compact-sized, cost is cheap, and optical conversion efficiencies are high.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all any modification, equivalent and improvement made within the spirit and principles of the invention etc., all should be included
Within protection scope of the present invention.
Claims (6)
- A kind of 1. annular multi-wavelength light fiber amplifier, it is characterised in that：Including positive coupling mirror (2), input dichroic mirror (3), just To lens (4), gain fibre (5), reverse coupled mirror (7), output dichroic mirror (8) and inverted lens (9)；Beam of laser (1) focuses on by positive coupling mirror (2) reflection, input dichroic mirror (3) transmission, positive lens (4) successively It is coupled into and by gain fibre (5), then is reversed lens (9) beam-expanding collimation, it is defeated after output dichroic mirror (8) reflection Go out；Second beam laser (6) focuses on by reverse coupled mirror (7) reflection, output dichroic mirror (8) transmission and inverted lens (9) successively It is coupled into and by gain fibre (5), then by positive lens (4) beam-expanding collimation, by inputting dichroic mirror (3) reflection, output Exported after dichroic mirror (8) transmission；Pump light (10) divides two-way, passes sequentially through described positive coupling mirror (2), input dichroic mirror (3), positive lens all the way (4) it is coupled into described gain fibre (5), another way passes sequentially through reverse coupled mirror (7), output dichroic mirror (8) and reverse Lens (9) are coupled into described gain fibre (5).
- 2. according to the annular multi-wavelength light fiber amplifier described in claim 1, it is characterised in that：Described positive coupling mirror (2) 90% is more than to described pump light (10) transmitance, 50% is more than to described beam of laser (1) reflectivity.
- 3. according to the annular multi-wavelength light fiber amplifier described in claim 1, it is characterised in that：Described input dichroic mirror (3) 90% is more than to described pump light (10) transmitance, 50% is more than to described beam of laser (1) transmitance, to institute Second beam laser (6) reflectivity stated is more than 50%.
- 4. according to the annular multi-wavelength light fiber amplifier described in claim 1, it is characterised in that：Described reverse coupled mirror (7) 90% is more than to described pump light (10) transmitance, 50% is more than to second described beam laser (6) reflectivity.
- 5. according to the annular multi-wavelength light fiber amplifier described in claim 1, it is characterised in that：Described output dichroic mirror (8) 90% is more than to described pump light (10) transmitance, 50% is more than to second described beam laser (6) transmitance, to institute Beam of laser (1) reflectivity stated is more than 50%.
- 6. the annular multi-wavelength light fiber amplifier according to claim 1 or 2 or 3 or 4 or 5, it is characterised in that：Described increasing Absorption of the beneficial optical fiber (5) to pump light (10) is more than 10dB, to beam of laser (1) and the transmission loss of the second beam laser (6) Less than 1dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510309298.9A CN104917040B (en) | 2015-06-08 | 2015-06-08 | A kind of annular multi-wavelength light fiber amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510309298.9A CN104917040B (en) | 2015-06-08 | 2015-06-08 | A kind of annular multi-wavelength light fiber amplifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104917040A CN104917040A (en) | 2015-09-16 |
| CN104917040B true CN104917040B (en) | 2018-03-09 |
Family
ID=54085866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510309298.9A Active CN104917040B (en) | 2015-06-08 | 2015-06-08 | A kind of annular multi-wavelength light fiber amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104917040B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07508355A (en) * | 1992-04-03 | 1995-09-14 | テルストラ コーポレイション リミテッド | Improvement of optical phase shifter |
| GB0612348D0 (en) * | 2006-06-21 | 2006-08-02 | Imp Innovations Ltd | Method and apparatus for coherently combining laser emission |
| CN101694920B (en) * | 2009-10-30 | 2011-07-27 | 吴肇宸 | Diode laser dual-end-surface-pumped dual-output all-solid-state laser |
| CN203707558U (en) * | 2014-01-07 | 2014-07-09 | 杭州电子科技大学 | High-power double-frequency solid microchip laser device |
| CN204290022U (en) * | 2014-11-25 | 2015-04-22 | 中国工程物理研究院应用电子学研究所 | Infrared two-chamber optical parametric oscillator in a kind of narrow linewidth high light beam quality |
-
2015
- 2015-06-08 CN CN201510309298.9A patent/CN104917040B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104917040A (en) | 2015-09-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8218928B2 (en) | Spatial filtering of higher order modes in multimode fibers | |
| CN204992234U (en) | Optical fibre amplifier system and device that multipass enlargies | |
| CN107623246B (en) | Fiber core co-band pumping fiber laser | |
| US5283846A (en) | Optical isolator, optical circuit, and rare-earth-doped fiber optical amplifier | |
| CN105720461B (en) | One kind tunable thulium holmium of 2 micron wavebands is co-doped with mode-locked all-fiber laser | |
| CN103531994A (en) | Same-bandwidth pumping single-frequency optical fiber laser using erbium-doped quartz optical fiber as gain medium | |
| CN105720467A (en) | 2-micrometer waveband all-polarization-maintaining locked-mode ultrafast pulse fiber laser | |
| CN103208728A (en) | High-power pulse per second type ytterbium-doped all-fiber laser system | |
| CN106469887A (en) | The Double-pass amplifier of photonic crystal fiber | |
| CA2326980A1 (en) | Low cost amplifier using bulk optics | |
| CN104917040B (en) | A kind of annular multi-wavelength light fiber amplifier | |
| CN103280691A (en) | High-power laser optical fiber amplifier | |
| US7038844B2 (en) | High power 938 nanometer fiber laser and amplifier | |
| CN204927791U (en) | Bi -pass amplifier of photonic crystal optic fibre | |
| CN113270785A (en) | Continuous wave 1.5 mu m human eye safety all-solid-state self-Raman laser | |
| TWI699937B (en) | Laser device | |
| CN109407440B (en) | Single-mode high-power amplification device based on large-mode-field optical fiber | |
| CN212323399U (en) | Space pumping coupling and output structure and femtosecond pulse laser | |
| CN217362137U (en) | Laser amplifier, laser, and optical system | |
| JP7090695B2 (en) | Laser light system | |
| CN113809627B (en) | Laser amplifier | |
| US8755415B2 (en) | Laser and optical amplifier | |
| Li et al. | Multiplexing and Amplification of 2-$\mu\text {m} $ Vortex Beams With a Ho: YAG Rod Amplifier | |
| CN117134180B (en) | High-power planar waveguide laser amplification gain module and laser | |
| US10490966B1 (en) | Optical fiber device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |