CN105576487A - Laser amplifier - Google Patents
Laser amplifier Download PDFInfo
- Publication number
- CN105576487A CN105576487A CN201610178054.6A CN201610178054A CN105576487A CN 105576487 A CN105576487 A CN 105576487A CN 201610178054 A CN201610178054 A CN 201610178054A CN 105576487 A CN105576487 A CN 105576487A
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- Prior art keywords
- optical fiber
- laser amplifier
- energy
- fiber
- fibre
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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
- H01S3/06754—Fibre amplifiers
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
The invention provides a laser amplifier. The amplifier comprises an optical fiber disc. The optical fiber disc is provided with a transmitting energy fiber which is coiled in a regular shape and/or a gain fiber. The optical fiber disc is also provided with a temperature adjusting device and a pressure adjusting device which are contacted with the transmitting energy fiber and/or the gain fiber. In the invention, the transmitting energy fiber and/or the gain fiber is coiled in the regular shape, and the temperature adjusting device and the pressure adjusting device are arranged on the transmitting energy fiber and/or the gain fiber so that a temperature gradient field and a stress gradient field are simultaneously exerted on the transmitting energy fiber and/or the gain fiber and a purpose of restraining a SBS is reached.
Description
Art
Laser field of the present invention, particularly a kind of laser amplifier.
Background technology
High power all-fiber single-frequency laser amplifier is one of important directions of high-capacity optical fiber laser development, the light beam that such high-capacity optical fiber laser exports has single longitudinal mode, extremely narrow output linewidth (accurate single-frequency), linear polarization characteristic (high polarization extinction ratio), the beam characteristics of these uniquenesses be this type of laser at gravitational wave detection, coherent detection, the application of the aspects such as optics coherence tomography, optical power spectra synthesis is increasingly extensive.The light source used in the gravitational wave detection set the world on fire in the recent period is the single-frequency laser with pole single-frequency.
At present, at laser radar detection, the aspects such as optics coherence tomography and optical power spectra synthesis, all in the urgent need to the high power of hectowatt grade and even multikilowatt, single frequency fiber Laser output.For high power single frequency optical fiber laser, the be concerned with single-frequency brought apart from narrow linewidth of the overlength that super-narrow line width brings also is basis for high power laser light optics coherence tomography and Spectral beam combining.But owing to being subject to the restriction of nonlinear effect (stimulated Brillouin scattering), the power of single frequency optical fiber laser cannot improve all the time.Stimulated Brillouin scattering (SBS) is the backward Stokes ripple because the optical transport of high strength excites.When pump power reaches certain level, the refractive-index grating that pump light causes, by Bragg diffraction scattering pump light, forms backward Stokes light; The backward Stokes light produced is interferenceed with pump light and produces sound wave by electrostriction effect, acoustic wavefield further modulated media refractive index scattering pump light.Due to the conservation of energy, such SBS production process just limits forward direction power output.In energy-transmission optic fibre, the generation of backward Stokes ripple can the power of serious limit fibre output; In gain fibre, backward light field can produce pulsation and then cause the device loss in fiber amplifier.Thus, key issue urgently to be resolved hurrily in single frequency fiber laser amplifier system is become to the suppression of SBS.
Especially for high power single-frequency fiber amplifier, due to breadth of spectrum line very arrowband, to carry out SBS threshold value lower, and the ultimate challenge that single frequency optical fiber laser power ascension is faced is exactly the SBS effect in optical fiber.SBS effect in fiber laser and suppressing method thereof have carried out many research, propose the doping composition such as changing optical fiber, increase the temperature gradient of optical fiber, increase the stress gradient of optical fiber, shorten the threshold value that the methods such as the core diameter of fiber lengths and increase optical fiber improve SBS.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of laser amplifier, by energy-transmission optic fibre and/or gain fibre rule are coiled, and on energy-transmission optic fibre and/or gain fibre set temperature adjusting device and pressure-regulating device, realize applying temperature gradient field and stress gradient field to energy-transmission optic fibre and/or gain fibre simultaneously, thus reach suppression SBS object.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is, a kind of laser amplifier is provided, comprise: fiber reel, described fiber reel is provided with energy-transmission optic fibre and/or the gain fibre of the coiling in regular shape, described fiber reel is also provided with the temperature-adjusting device and pressure-regulating device that contact with energy-transmission optic fibre and/or gain fibre.
Further, described fiber reel offers the optical fiber duct that to match with described energy-transmission optic fibre and/or gain fibre coiled shape, described energy-transmission optic fibre and/or gain fibre are arranged in optical fiber duct.
Further, described temperature-adjusting device comprises: conducting strip, and described conducting strip is laid in optical fiber duct.
Further, described conducting strip edge extends to fiber reel surface, described in extend to fiber reel surface conducting strip contact with temperature sensor.
Further, described pressure-regulating device comprises: pressure regulator panel, and described pressure regulator panel is across above optical fiber duct.
Further, described pressure regulator panel is connected with elastic force apparatus, described elastic force apparatus one end is connected with pressure regulator panel, and the other end contacts with energy-transmission optic fibre and/or gain fibre.
Further, described pressure regulator panel two ends are respectively equipped with an installing hole, and described pressure regulator panel is connected with fiber reel by the screw inserted in installing hole, regulates the size of the power on energy-transmission optic fibre and/or gain fibre that is applied to by turning screw.
Further, the cross section of described optical fiber duct is U-shaped, V-arrangement or W shape.
Further, described energy-transmission optic fibre and/or gain fibre are track type coiling.
Further, described conducting strip is liquid metal for conducting heat sheet.
The invention has the beneficial effects as follows: the present invention is by coiling energy-transmission optic fibre and/or gain fibre rule, and on energy-transmission optic fibre and/or gain fibre set temperature adjusting device and pressure-regulating device, realize applying temperature gradient field and stress gradient field to energy-transmission optic fibre and/or gain fibre simultaneously, thus reach suppression SBS object.
Accompanying drawing explanation
Fig. 1 is fiber reel structural representation of the present invention;
Fig. 2 is optical fiber duct cross sectional representation of the present invention;
Fig. 3 is temperature-adjusting device schematic diagram of the present invention;
Fig. 4 is pressure-regulating device schematic diagram of the present invention.
Description of reference numerals: 1, fiber reel; 11, optical fiber duct; 12, energy-transmission optic fibre and gain fibre; 2, temperature-adjusting device; 21, conducting strip; 22, temperature sensor; 23, thermoregulator; 3, pressure-regulating device; 31, pressure regulator panel; 32, elastic force apparatus; 33, spring clip 33.
Embodiment
For the ease of understanding the present invention, below in conjunction with the drawings and specific embodiments, the present invention will be described in more detail.It should be noted that, when element is stated " being fixed on " another element, it can directly on another element or can there is one or more element placed in the middle therebetween.When an element is stated " connection " another element, it can be directly connected to another element or can there is one or more element placed in the middle therebetween.The term " vertical " that this specification uses, " level ", "left", "right" and similar statement are just for illustrative purposes.
Unless otherwise defined, all technology of using of this specification and scientific terminology are identical with belonging to the implication that those skilled in the art of the present invention understand usually.The object of term used in the description of the invention in this specification just in order to describe concrete execution mode is not for limiting the present invention.The term "and/or" that this specification uses comprises arbitrary and all combinations of one or more relevant Listed Items.
Below in conjunction with drawings and embodiments, the present invention is described in detail.
Embodiment 1
As shown in Figure 1, a kind of laser amplifier, comprise: fiber reel 1, fiber reel 1 is provided with energy-transmission optic fibre and the gain fibre 12 of the coiling in regular shape, fiber reel 1 is also provided with the temperature-adjusting device 3 and pressure-regulating device 3 that contact with gain fibre 12 with energy-transmission optic fibre.Energy-transmission optic fibre and gain fibre are by being welded together, two ends energy-transmission optic fibre is connected to gain fibre two ends, the mixed optical fiber of one will be welded into, coil in track type, the two ends of track type coiling are semicircle, semicircular inner radius is not more than 6cm, and semicircular outer radius is not less than 30cm.The coiled shape of optical fiber is not limited to track type, according to the difference of embody rule scene, optical fiber can in the shape of a spiral, annular, oval or Pear-Shaped coiling.Below optical fiber after having coiled, set temperature regulating and controlling device, arranges pressure-regulating device 3 above optical fiber, and temperature control equipment can control the operating ambient temperature of optical fiber, and then plays the effect regulating fiber optic temperature.Pressure-regulating device 3 acts directly on optical fiber, can change by regulating the pressure be applied on optical fiber.Adopt this design to realize applying temperature gradient field and stress gradient field to the hybrid fiber that energy-transmission optic fibre and gain fibre 12 are formed simultaneously, thus reach suppression SBS object.
As another execution mode of coiled fiber in present embodiment, fiber reel 1 is provided with the energy-transmission optic fibre of the coiling in regular shape, fiber reel 1 is also provided with the temperature-adjusting device 3 and pressure-regulating device 3 that contact with energy-transmission optic fibre.Energy-transmission optic fibre is track type coiling, and the coiled shape of energy-transmission optic fibre is not limited to track type, according to the difference of embody rule scene, energy-transmission optic fibre can in the shape of a spiral, annular, oval or Pear-Shaped coiling.Below energy-transmission optic fibre after having coiled, set temperature regulating and controlling device, arranges pressure-regulating device 3 above energy-transmission optic fibre, and temperature control equipment can control the operating ambient temperature of energy-transmission optic fibre, and then plays the effect regulating energy-transmission optic fibre temperature.Pressure-regulating device 3 acts directly on optical fiber, can change by regulating the pressure be applied on optical fiber.
As another execution mode of coiled fiber in present embodiment, fiber reel 1 is provided with the gain fibre of the coiling in regular shape, fiber reel 1 is also provided with the temperature-adjusting device 3 and pressure-regulating device 3 that contact with gain fibre.Gain fibre is track type coiling, and the coiled shape of gain fibre is not limited to track type, according to the difference of embody rule scene, gain fibre can in the shape of a spiral, annular, oval or Pear-Shaped coiling.Below gain fibre after having coiled, set temperature regulating and controlling device, arranges pressure-regulating device 3 above gain fibre, and temperature control equipment can the operating ambient temperature of ride gain optical fiber, and then plays the effect regulating gain fibre temperature.Pressure-regulating device 3 acts directly on optical fiber, can change by regulating the pressure be applied on optical fiber.
Fiber reel 1 for carrier around after energy-transmission optic fibre and gain fibre 12, fiber reel 1 offers the optical fiber duct 11 corresponding with the coiled shape coiling rear optical fiber, in the present embodiment, the shape of optical fiber duct 11 is the track type that radius reduces gradually, the two ends of track type coiling are semicircle, semicircular inner radius is not more than 6cm, and semicircular outer radius is not less than 30cm.The global shape of optical fiber duct 11 is not limited to track type, and according to the difference of embody rule scene, the global shape of optical fiber duct 11 can be the helical form, annular, ellipse or the Pear-Shaped that close around matching form with fiber reel 1.The shape of cross section of optical fiber duct 11 is U-shaped, but is not limited thereto, and according to the difference of embody rule scene, the cross section street of optical fiber duct 11 can V-shaped or W shape.Optical fiber after coiling is arranged in optical fiber duct 11.
Temperature-adjusting device 3 comprises: conducting strip 21, temperature sensor 22 and thermoregulator 23, conducting strip 21 part is positioned at optical fiber duct 11, in the two ends extended spot optical fiber duct 11 of conducting strip 21, conducting strip 21 two ends of extending optical fiber duct 11 are close to the surface of fiber reel 1, temperature sensor 22 is connected with above conducting strip 21 two ends, temperature sensor 22 is for measuring the temperature of conducting strip 21, temperature sensor 22 is connected with thermoregulator 23, thermoregulator 23 receives the real time temperature of the conducting strip 21 that temperature sensor 22 is uploaded, regulate according to the temperature of setting adjustment program to fiber reel 1, the temperature of fiber work environment is made to adjust within the scope of default temperature threshold, to ensure the Efficient Operation of amplifier.Conducting strip 21 in the present embodiment is: liquid metal for conducting heat sheet 21, and be solid-state under the liquid metal normal temperature in liquid metal for conducting heat sheet 21, fusing point is 59 degrees Celsius, and boiling point is more than 2,000 degrees Celsius, just has good capacity of heat transmission.But conducting strip 21 is not limited to liquid metal for conducting heat sheet 21, according to the difference of embody rule scene, conducting strip 21 can be substituted by liquid metal for conducting heat cream or indium foil.Temperature sensor 22 is thermistor, and thermoregulator 23 is electronic temperature controller.
Pressure-regulating device 3 comprises: pressure regulator panel 31, and pressure regulator panel 31 is specially rectangle sheet metal, but the shape of pressure adjustment sheet is not limited to rectangle, can be square or oval according to the different pressures adjustable plate 31 of embody rule scene.Pressure regulator panel 31 is across the straight line side in track type optical fiber duct 11, pressure regulator panel 31 is being provided with an elastic force apparatus 32 with each optical fiber duct 11 corresponding position, elastic force apparatus 32 other end is provided with a spring clip 33, the size of spring clip 33 is less than the aperture area of optical fiber duct 11, spring clip 33 is specially sheet metal, but be not limited to, spring clip 33 is rubber in some embodiments.Pressure regulator panel 31 two ends are respectively equipped with an installing hole (not shown), screw (not shown) is inserted with in installing hole, fiber reel 1 is provided with screw (not shown) with installing hole corresponding position, and pressure regulator panel 31 is connected with fiber reel 1 by screw.Pressure regulator panel 31 is arranged on optical fiber duct 11, be arranged on the optical fiber contact of spring clip 33 namely directly and in optical fiber duct 11 on elastic force apparatus 32, and extruding is produced to optical fiber, the size of the power that elastic force apparatus 32 acts on optical fiber depends on, distance between pressure regulator panel 31 and fiber reel 1 upper surface, regulate the distance between pressure regulator panel 31 and fiber reel 1 upper surface and adjustable by turning screw, elastic force apparatus 32 acts on the extruding force on optical fiber.Elastic force apparatus 32 is specially: spring, but is not limited to, and according to the difference of embody rule scene, elastic force apparatus 32 can be rubber shell fragment.
As the another kind of execution mode of pressure-regulating device in present embodiment 3, pressure-regulating device 3 comprises: pressure regulator panel 31, pressure regulator panel 31 is specially rectangle sheet metal, but the shape of pressure adjustment sheet is not limited to rectangle, can be square or oval according to the different pressures adjustable plate 31 of embody rule scene.Pressure regulator panel 31 is across the straight line side in track type optical fiber duct 11, pressure regulator panel 31 is being provided with an elastic force apparatus 32 with each optical fiber duct 11 corresponding position, pressure regulator panel 31 two ends are respectively equipped with an installing hole (not shown), screw (not shown) is inserted with in installing hole, fiber reel 1 is provided with screw (not shown) with installing hole corresponding position, and pressure regulator panel 31 is connected with fiber reel 1 by screw.Pressure regulator panel 31 is arranged on optical fiber duct 11, be arranged on the optical fiber contact of elastic force apparatus 32 namely directly and in optical fiber duct 11 in pressure regulator panel 31, and extruding is produced to optical fiber, the size of the power that elastic force apparatus 32 acts on optical fiber depends on, distance between pressure regulator panel 31 and fiber reel 1 upper surface, regulate the distance between pressure regulator panel 31 and fiber reel 1 upper surface and adjustable by turning screw, elastic force apparatus 32 acts on the extruding force on optical fiber.Elastic force apparatus 32 is specially: spring, but is not limited to, and according to the difference of embody rule scene, elastic force apparatus 32 can be rubber shell fragment.
Fiber reel structure in the present invention, and be attached to optical fiber duct, optical fiber coiled fashion, temperature-adjusting device and the pressure-regulating device on fiber reel, can not only be applied to laser amplifier, same structure is also applicable to laser.
It should be noted that, preferably execution mode of the present invention is given in specification of the present invention and accompanying drawing thereof, but, the present invention can be realized by many different forms, be not limited to the execution mode described by this specification, these execution modes not as the extra restriction to content of the present invention, provide the object of these execution modes be make the understanding of disclosure of the present invention more comprehensively thorough.Further, above-mentioned each technical characteristic continues combination mutually, is formed not at above-named various execution mode, is all considered as the scope that specification of the present invention is recorded; Further, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection range that all should belong to claims of the present invention.
Claims (10)
1. a laser amplifier, it is characterized in that, comprise: fiber reel, described fiber reel is provided with energy-transmission optic fibre and/or the gain fibre of the coiling in regular shape, described fiber reel is also provided with the temperature-adjusting device and pressure-regulating device that contact with energy-transmission optic fibre and/or gain fibre.
2. laser amplifier according to claim 1, is characterized in that, described fiber reel offers the optical fiber duct that to match with described energy-transmission optic fibre and/or gain fibre coiled shape, described energy-transmission optic fibre and/or gain fibre are arranged in optical fiber duct.
3. laser amplifier according to claim 2, it is characterized in that, described temperature-adjusting device comprises: conducting strip, and described conducting strip is laid in optical fiber duct.
4. laser amplifier according to claim 3, it is characterized in that, described conducting strip edge extends to fiber reel surface, described in extend to fiber reel surface conducting strip contact with temperature sensor.
5. laser amplifier according to claim 3 ~ 4 any one, is characterized in that, described pressure-regulating device comprises: pressure regulator panel, and described pressure regulator panel is across above optical fiber duct.
6. laser amplifier according to claim 5, it is characterized in that, described pressure regulator panel is connected with elastic force apparatus, described elastic force apparatus one end is connected with pressure regulator panel, and the other end contacts with energy-transmission optic fibre and/or gain fibre.
7. laser amplifier according to claim 6, it is characterized in that, described pressure regulator panel two ends are respectively equipped with an installing hole, described pressure regulator panel is connected with fiber reel by the screw inserted in installing hole, regulates the size of the power on energy-transmission optic fibre and/or gain fibre that is applied to by turning screw.
8. laser amplifier according to claim 6 ~ 7 any one, is characterized in that, the cross section of described optical fiber duct is U-shaped, V-arrangement or W shape.
9. laser amplifier according to claim 6 ~ 7 any one, is characterized in that, described energy-transmission optic fibre and/or gain fibre are track type coiling.
10. laser amplifier according to claim 6 ~ 7 any one, is characterized in that, described conducting strip is liquid metal for conducting heat sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610178054.6A CN105576487A (en) | 2016-03-18 | 2016-03-25 | Laser amplifier |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016202106043 | 2016-03-18 | ||
| CN201620210604 | 2016-03-18 | ||
| CN201610178054.6A CN105576487A (en) | 2016-03-18 | 2016-03-25 | Laser amplifier |
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| Publication Number | Publication Date |
|---|---|
| CN105576487A true CN105576487A (en) | 2016-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610178054.6A Pending CN105576487A (en) | 2016-03-18 | 2016-03-25 | Laser amplifier |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106159658A (en) * | 2016-08-17 | 2016-11-23 | 南方科技大学 | Optical fiber laser |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800396A (en) * | 2010-02-03 | 2010-08-11 | 中国人民解放军国防科学技术大学 | Stimulated Brillouin scattering (SBS) suppression method for narrow band fiber Raman amplifier |
| US20110038035A1 (en) * | 2008-01-18 | 2011-02-17 | European Organisation For Astronomical Research In The Southern Hemisphere | Narrow band fiber raman optical amplifier |
| CN102280804A (en) * | 2011-07-08 | 2011-12-14 | 北京交通大学 | Polarization maintaining fiber amplifier without polarization maintaining fiber |
| US20140348463A1 (en) * | 2011-10-04 | 2014-11-27 | Citizen Holdings Co., Ltd. | Optical device and method for manufacuturing the optical device |
| CN204479792U (en) * | 2015-01-22 | 2015-07-15 | 北京奥普维尔科技有限公司 | A kind of heat sealing machine heating tank and optical fiber splicer |
-
2016
- 2016-03-25 CN CN201610178054.6A patent/CN105576487A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110038035A1 (en) * | 2008-01-18 | 2011-02-17 | European Organisation For Astronomical Research In The Southern Hemisphere | Narrow band fiber raman optical amplifier |
| CN101800396A (en) * | 2010-02-03 | 2010-08-11 | 中国人民解放军国防科学技术大学 | Stimulated Brillouin scattering (SBS) suppression method for narrow band fiber Raman amplifier |
| CN102280804A (en) * | 2011-07-08 | 2011-12-14 | 北京交通大学 | Polarization maintaining fiber amplifier without polarization maintaining fiber |
| US20140348463A1 (en) * | 2011-10-04 | 2014-11-27 | Citizen Holdings Co., Ltd. | Optical device and method for manufacuturing the optical device |
| CN204479792U (en) * | 2015-01-22 | 2015-07-15 | 北京奥普维尔科技有限公司 | A kind of heat sealing machine heating tank and optical fiber splicer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106159658A (en) * | 2016-08-17 | 2016-11-23 | 南方科技大学 | Optical fiber laser |
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Application publication date: 20160511 |