CN102684045A - High-power broadband ASE (Amplified Spontaneous Emission) light source in 1064 nm waveband - Google Patents
High-power broadband ASE (Amplified Spontaneous Emission) light source in 1064 nm waveband Download PDFInfo
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Abstract
The invention provides a high-power broadband ASE (Amplified Spontaneous Emission) light source in 1064 nm waveband, comprising a beam combiner, a section of YDF (Ytterbium Doped Fiber), an optical isolator, a fiber end cap, a semiconductor pump laser and a section of YDF in certain length. The invention is characterized in that: a light output end only needs to be welded with a small section of YDF in non-pumping state, the secondary absorption effect of the YDF on ASE optical signals is utilized, and an ASE spectrum shape is effectively processed and flatly outputted. An optical path box in which the YDF is wound is arranged on a temperature-controllable simple heating plate, the working temperature of the YDF is adjusted and controlled, the ASE spectrum shape is further outputted flatly, and the ASE light output spectrum bandwidth is effectively improved. Besides, in the non-output direction, the fiber end cap based on small-section multimode fiber grinding and coating manner is welded for restraining the light reflection on the end surface of the fiber, the laser output formed by self-oscillation is avoided, the pumping power is ensured to be improved, and meanwhile, the scale of ASE light output power is effectively improved.
Description
Technical field
The present invention relates to the applied light sources in field such as Fibre Optical Sensor, optical fiber communication and optical device measurement, the ASE optical fiber source in especially a kind of 1064nm wave band high-output power and broadband.
Background technology
1064nm wave band ASE light source based on amplified spontaneous emission (the Amplified Spontaneous Emission) principles of rare-earth doped optical fibre, is called for short the ASE light source.Compare with the light-emitting diode (LED) or the super-radiance light emitting diode (SLD) of low power output, ultra broadband; One of which ASE light source provides very high gain amplifier through one section doping ytterbium ion optical fiber; Not only obtain the broadband radiation of higher-wattage, and be easy to effectively be coupled with fibre system; Its two rare earths ytterbium ion energy level is more stable than the energy level of semiconductor diode, so the ASE light source has spectrum stability preferably; The life-span of its three ASE light source than the LED of present extensive use or SLD life-span long, polarization correlated low, reliability is high.
Present traditional ASE light source generally adopts the fiber core with single-mold pump technology, but the shortcoming that exists some to overcome.Prices such as the highly doped single cladded fiber of rare earth, 980nm or 1480nm single mode semiconductor pump laser are expensive on the one hand, and production cost is high; Though the spectral bandwidth of traditional on the other hand ASE light source can be accomplished broad, the ASE optical output power is obviously lower, only about 10mW ~ 20mW.For some application scenarios such as optical fiber sensing system, optical device analysis to measure, ten minutes exigence high power, wideband A SE light source.
Realize high power, the broadband output of ASE light source, reasonably optical texture is most important.General direct increase pumping light power is realized the high power output of ASE light source, but very high, the simple increase pumping light power of Active Optical Fiber gain is very easy to self-oscillation and produces the stimulated radiation light amplification, promptly exports laser, but not the ASE light source.In addition; Bad connection contact, fiber end face also can produce light reflection or light feedback in the light path, also form self-oscillation easily, and lasing possibility is arranged; This all is that the ASE light source is undesirable, and therefore how suppressing the reflection of end face light also is one of key point that obtains the output of high power wideband A SE light.
For the spectrum flatness or the bandwidth that increase the ASE light source; The common practices of C-band (1550nm wave band) or L-band (1610nm wave band) ASE light source is at light path output insertion gain flat filter GFF; Filter out asymmetric peak in the spectrum; Be used to improve the uneven degree of spectrum spectrum shape, promptly realize the output of ultra broadband ASE light.Use GFF for inscribing smooth 1064nm wave band ASE, it is higher that it inscribes cost at present, and technological operation is difficult, and the commercialization degree is not high.And insert GFF and filter out the ASE light at place, a part of peak, like this can great reduction power output level, cost of idleness.Therefore how improving bandwidth effectively also is another key point that obtains the output of high power wideband A SE light.
Summary of the invention
The objective of the invention is to solve the above-mentioned deficiency that prior art exists, propose a kind of high power wideband A SE light source of 1064nm wave band.
The object of the invention is realized through following technical scheme:
A kind of high power wideband A SE light source of 1064nm wave band; It is characterized in that comprising semiconductor pump laser, bundling device, the first active doubly clad optical fiber, first optical isolator, light path box, Controllable Temperature heating plate, the second active doubly clad optical fiber and optical fiber end cap; The output tail optical fiber of said semiconductor pump laser links to each other with the pumping input optical fibre of bundling device; The passive doubly clad optical fiber of the output of bundling device links to each other with first active doubly clad optical fiber one end, and the first active doubly clad optical fiber other end links to each other with the first optical isolator input; The first active doubly clad optical fiber is arranged in said light path box, and the light path box places on the said Controllable Temperature heating plate, and the first optical isolator output welding has the optical fiber end cap to link to each other; The passive doubly clad optical fiber of the input of bundling device links to each other with second active doubly clad optical fiber one end, and the second active doubly clad optical fiber other end links to each other with the second optical isolator input, and the second optical isolator output is as the ASE light output end.The present invention is based on multimode cladding pumping technology, produce the output of ASE light with the active doubly clad optical fiber YDF of pump laser pumping.Adopt YDF that ASE light signal secondary is absorbed, combine the mode of adjusting and control YDF working temperature again, smooth output ASE spectrum spectrum shape; At non-ASE output welding optic fibre end cap, suppress the reflection of fiber end face light, realize high-output power, the output of wideband A SE light.
Technical scheme as the further optimization of the high power wideband A SE light source of above-mentioned a kind of 1064nm wave band; The core diameter of the first active doubly clad optical fiber and the second active doubly clad optical fiber is 7～30 μ m; The inner cladding diameter is 125～250 μ m; Inner cladding is shaped as abnormal shape (like hexagon, octagon, D shape etc.), and the fibre core numerical aperture is 0.06～0.20, to 800～1000nm pump light absorption coefficient greater than 0.5dB/m; The first active doubly clad optical fiber length is 2～15 meters, and the said second active doubly clad optical fiber is a pump state not, and length is 0.2～5 meter.
As the technical scheme of the further optimization of the high power wideband A SE light source of above-mentioned a kind of 1064nm wave band, the length of the first active doubly clad optical fiber is greater than the length of the second active doubly clad optical fiber.
As the technical scheme of the further optimization of the high power wideband A SE light source of above-mentioned a kind of 1064nm wave band, said bundling device type is (n+1) * 1, n >=1; The passive doubly clad optical fiber of the input of said bundling device is 7～30 μ m with the passive doubly clad optical fiber core diameter of output, and the inner cladding diameter is 125～250 μ m; The pumping input optical fibre core diameter of said bundling device is 105～400 μ m, and cladding diameter is 125～440 μ m, and numerical aperture is 0.12～0.22.
Technical scheme as the further optimization of the high power wideband A SE light source of above-mentioned a kind of 1064nm wave band; The pumping wavelength of said semiconductor pump laser is 800～1000nm; Power output is greater than 0.5W; Output tail optical fiber core diameter is 105～400 μ m, and cladding diameter is 125～440 μ m, and numerical aperture is 0.12～0.22.
As the technical scheme of the further optimization of the high power wideband A SE light source of above-mentioned a kind of 1064nm wave band, said YDF coils into fiber turns, places the light path box.
Technical scheme as the further optimization of the high power wideband A SE light source of above-mentioned a kind of 1064nm wave band; Said optical fiber end cap comprises passive single cladded fiber, capillary glass tube and multimode fiber; One end welding of passive single cladded fiber and multimode fiber, multimode fiber is arranged in capillary glass tube, and the other end fiber end face of multimode fiber grinds to form 8 ° of inclinations angle; And the plating anti-reflection film, said anti-reflection film to 1064nm wave band ASE optical transmission rate greater than 95%; Said multimode fiber core diameter is 50～400 μ m, and cladding diameter is 125～440 μ m, and numerical aperture is 0.12～0.22, and it uses length is 2～100mm.
As the technical scheme of the further optimization of the high power wideband A SE light source of above-mentioned a kind of 1064nm wave band, be connected the welding mode that adopts between said bundling device, first optical isolator, optical fiber end cap, semiconductor pump laser, second optical isolator and the first active doubly clad optical fiber and the second active doubly clad optical fiber.
As the technical scheme of the further optimization of the high power wideband A SE light source of above-mentioned a kind of 1064nm wave band, the first active doubly clad optical fiber and the second active doubly clad optical fiber are for mixing the active doubly clad optical fiber of ytterbium.The pumping wavelength of said semiconductor pump laser is 800 ~ 1100nm.
The controlled YDF working temperature of the simple and easy heating plate of said use method does, YDF is coiled into fiber turns, places an aluminum light path box.The light path box is placed above the simple and easy heating plate and fixing, regulate and control heating plate operating state, direct controlled light path box temperature is controlled the YDF working temperature then indirectly.
Said simple and easy heating plate is semiconductor cooling piece (TEC), and the hot junction one of its potsherd is faced up, and processes a simple heater (simple and easy heating plate).In the middle of the light path box body, open an aperture, a built-in thermistor temperature sensor be used for monitoring and feedback light path box temperature, so its temperature is directly controlled.
The present invention adopts multimode cladding pumping technology, with near the semiconductor pump laser pumping wavelength 800 ~ 1100nm, the highly doped ytterbium ion (Yb of covering pumping
3+) active doubly clad optical fiber (YDF), pump light is coupled into the YDF inner cladding through bundling device, when passing through the YDF fibre core, and Yb
3+The ionic absorption pump light transits to high level from ground state level under its effect; Along with pump power strengthens; The spontaneous radiation population increases gradually and realizes reversing; Single particle independently spontaneous radiation gradually becomes the harmonious stimulated radiation of a plurality of particles, promptly produces amplified spontaneous emission (ASE) light of higher-wattage output 1000 ~ 1150nm wave band.Especially be combined in the non-output welding one optical fiber end cap of ASE light source, to suppress the reflection of fiber end face light and to improve the fiber end face light injury threshold.And at the YDF of a bit of not pump state of ASE output welding; Be used for smooth output ASE spectrum spectrum shape; And further regulate working temperature with control YDF through a simple and easy heating plate, and improve ASE spectrum spectrum shape, can realize high power, the output of wideband A SE light of 1064nm wave band.
The present invention has following main advantage compared with prior art:
the present invention adopts a kind of end face reflection braking measure; Be that non-output connects the optical fiber end cap based on a bit of multimode fiber grinds and the plated film mode is made; It is used to suppress the reflection of fiber end face light; Avoid self-excitation phenomena; In the time of can guaranteeing to increase pump power, improve ASE optical output power level effectively.
⑷ the present invention realizes having up to the power output more than the 500mW, and near the ASE light source of the more smooth bandwidth of 50nm (3dB spectral width), its output wavelength covers 1030 ~ 1080nm wave band, and output spectrum and Output optical power are reliable and stable.
Description of drawings
Fig. 1 is the structural representation of the high power wideband A SE light source of a kind of 1064nm wave band in the execution mode.
Fig. 2 is that bundling device described in the execution mode is formed structural representation.
Fig. 3 is the cap of optical fiber end described in an execution mode sketch map.
Fig. 4 is a simple and easy heating plate work sketch map described in the execution mode.
Fig. 5 is the ASE spectrogram that embodiment exported in the execution mode.
Embodiment
Enforcement example and accompanying drawing below in conjunction with concrete are further described explaination to the present invention, but are not limited to this execution mode.
As shown in Figure 1; The high-output power of 1064nm wave band, wideband A SE light source are made up of the active doubly clad optical fiber of bundling device 1, the first active doubly clad optical fiber (mixing the active doubly clad optical fiber YDF of ytterbium) 2, first optical isolator 6, optical fiber end cap 7, semiconductor pump laser 8, second 9, second optical isolator 10.Semiconductor pump laser 8 pumping wavelengths are 915nm in the present embodiment, and power output is that 10W is adjustable, and the output tail optical fiber is multimode fiber 105/125 0.22NA.Its semiconductor pump laser 8 output tail optical fibers link to each other with bundling device pumping input optical fibre 5, for YDF provides the pumping pumping energy.First active doubly clad optical fiber 2 one ends are linked to each other with the passive doubly clad optical fiber 3 of bundling device 1 output; First active doubly clad optical fiber 2 other ends are linked to each other with optical isolator 6 inputs; And YDF coils in the light path box and places above the simple and easy heating plate and (makes light path box body Controllable Temperature; And then control YDF working temperature), optical isolator 6 outputs are linked to each other with optical fiber end cap 7.Again the passive doubly clad optical fiber 4 of bundling device 1 input is linked to each other with a bit of not pumping second active doubly clad optical fiber 9; The second active doubly clad optical fiber 9 use length are 1 meter in the present embodiment; Then second active doubly clad optical fiber 9 other ends are linked to each other with optical isolator 10 inputs, with optical isolator 10 outputs as ASE light source output.ASE light does not have directivity, and its emission spectrum is very wide, unevenness.Its characteristics are, carry out secondary at the second active doubly clad optical fiber 9 of a bit of not pump state of input welding of bundling device and absorb, and are used for smooth output ASE spectrum spectrum shape, improve the bandwidth of exporting 1064nm wave band ASE spectrum.Its first active doubly clad optical fiber 2 core diameters are 10 μ m, and the inner cladding diameter is 125 μ m (being shaped as octagon), and the fibre core numerical aperture is 0.08, and it uses length is 7 meters.
As shown in Figure 2, bundling device 1 used in the present invention is made up of the passive doubly clad optical fiber of the passive doubly clad optical fiber of input 4, output 3, pumping input optical fibre 5 together.Used bundling device type is (2+1) * 1 in the present embodiment; Earlier with fiber stripping in the middle of 2 pumping input optical fibres; Till about the about 20 μ m of prestretching to awl district's diameter; Then it is close to the naked fine surface of passive doubly clad optical fiber, draws awl to awl district to fuse into one together, i.e. the molten pull-up technology bundling device in (2+1) * 1.Its passive doubly clad optical fiber 4 and 3 core diameter are 10 μ m, and the inner cladding diameter is 125 μ m.Pumping input optical fibre 5 is multimode fiber 105/125 0.22NA, and its core diameter is 105 μ m, and cladding diameter is 125 μ m, and numerical aperture is 0.22.
As shown in Figure 3, optical fiber end cap 7 used in the present invention is made up of passive single cladded fiber 11, capillary glass tube 12, multimode fiber 13.Passive single cladded fiber 11 core diameters in the present embodiment are 10 μ m, and cladding diameter is 125 μ m.Passive single cladded fiber 11 1 ends and a bit of multimode fiber 13 1 ends are carried out welding, and multimode fiber 13 uses length to be 3mm in the present embodiment, and its optical parametric is 105/125 0.22NA; Multimode fiber after the welding 13 is penetrated in the capillary glass tube 12; And injecting glue is fixed; Multimode fiber 13 other ends are ground to form 8 degree inclinations angle, and, be used to suppress the reflection of fiber end face light and improve the fiber end face light injury threshold its fiber end face plating anti-reflection film; Can increase substantially ASE power output scale, avoid producing self-excitation phenomena and form laser generation output.Said anti-reflection film to 1064nm wave band ASE optical transmission rate greater than 95%.
As shown in Figure 4, among the present invention the first active doubly clad optical fiber 2 is coiled into fiber turns, dish is gone in the aluminum light path box 14, light path box 14 placed above the simple and easy heating plate 15 of TEC pottery chip, by DC power supply 16 power supplies, control light path box temperature.Be characterized in: can control the YDF working temperature indirectly and in 25 ℃ ~ 70 ℃ scopes of room temperature, change, working temperature is 55 ℃ in the present embodiment.Yb
3+The emission spectra of ion and sandwich layer are obvious to the absorbing state temperature influence of 1000 ~ 1100nm band of light, through regulating the working temperature with control YDF, can compose shape by smooth ASE spectrum, further improve the bandwidth of output 1064nm wave band ASE spectrum.
ASE spectrogram result as shown in Figure 5, that the embodiment of the invention is exported, visible, the 3dB spectral width is about 50nm, covers 1030 ~ 1080nm wave band, and its power output is up to 500mW, and Output optical power stability has good stability with spectral waveform.
Doubly clad optical fiber among the present invention is not only applicable to the monomode fiber of general core diameter, is applicable to big core diameter doubly clad optical fiber yet.As stated, can realize preferably that the present invention, the foregoing description are merely preferred embodiment of the present invention, be not to be used to limit its practical range.
Claims (10)
1. the high power wideband A SE light source of a 1064nm wave band; It is characterized in that comprising semiconductor pump laser (8), bundling device (1), the first active doubly clad optical fiber (2), first optical isolator (6), light path box (14), Controllable Temperature heating plate (15), the second active doubly clad optical fiber (9) and optical fiber end cap (7); The output tail optical fiber of said semiconductor pump laser (8) links to each other with the pumping input optical fibre (5) of bundling device (1); The passive doubly clad optical fiber of output (3) of bundling device (1) links to each other with first active doubly clad optical fiber (2) one ends, and first active doubly clad optical fiber (2) other end links to each other with first optical isolator (6) input; The first active doubly clad optical fiber (2) is arranged in said light path box (14), and light path box (14) places on the said Controllable Temperature heating plate (15), and first optical isolator (6) output welding has optical fiber end cap (7) to link to each other; The passive doubly clad optical fiber of input (4) of bundling device (1) links to each other with second active doubly clad optical fiber (9) one ends; Second active doubly clad optical fiber (9) other end links to each other with second optical isolator (10) input, and second optical isolator (10) output is as the ASE light output end.
2. the high power wideband A SE light source of a kind of 1064nm wave band as claimed in claim 1; It is characterized in that: the first active doubly clad optical fiber (2) is 7～30 μ m with the core diameter of the second active doubly clad optical fiber (9); The inner cladding diameter is 125～250 μ m; The fibre core numerical aperture is 0.06～0.20, to 800～1000nm pump light absorption coefficient greater than 0.5dB/m; First active doubly clad optical fiber (2) length is 2～15 meters, and the said second active doubly clad optical fiber (9) is a pump state not, and length is 0.2～5 meter.
3. the high power wideband A SE light source of a kind of 1064nm wave band as claimed in claim 2, it is characterized in that: the length of the first active doubly clad optical fiber (2) is greater than the length of the second active doubly clad optical fiber (9).
4. the high power wideband A SE light source of a kind of 1064nm wave band as claimed in claim 1 is characterized in that: said bundling device (1) type is (n+1) * 1, n >=1; The passive doubly clad optical fiber of input (4) of said bundling device (1) is 7～30 μ m with output passive doubly clad optical fiber (3) core diameter, and the inner cladding diameter is 125～250 μ m; Pumping input optical fibre (5) core diameter of said bundling device (1) is 105～400 μ m, and cladding diameter is 125～440 μ m, and numerical aperture is 0.12～0.22.
5. the high power wideband A SE light source of a kind of 1064nm wave band as claimed in claim 1; It is characterized in that: the pumping wavelength of said semiconductor pump laser (8) is 800～1000nm; Power output is greater than 0.5W; Output tail optical fiber core diameter is 105～400 μ m, and cladding diameter is 125～440 μ m, and numerical aperture is 0.12～0.22.
6. the high power wideband A SE light source of a kind of 1064nm wave band as claimed in claim 1, it is characterized in that: said YDF (2) coils into fiber turns, places light path box (14).
7. the high power wideband A SE light source of a kind of 1064nm wave band as claimed in claim 1; It is characterized in that: said optical fiber end cap (7) comprises passive single cladded fiber, capillary glass tube and multimode fiber; One end welding of passive single cladded fiber and multimode fiber, multimode fiber is arranged in capillary glass tube, and the other end fiber end face of multimode fiber grinds to form 8 ° of inclinations angle; And the plating anti-reflection film, said anti-reflection film to 1064nm wave band ASE optical transmission rate greater than 95%; Said multimode fiber core diameter is 50～400 μ m, and cladding diameter is 125～440 μ m, and numerical aperture is 0.12～0.22, and it uses length is 2～100mm.
8. the high power wideband A SE light source of a kind of 1064nm wave band as claimed in claim 1 is characterized in that: being connected between said bundling device (1), first optical isolator (6), optical fiber end cap (7), semiconductor pump laser (8), second optical isolator (10) and the first active doubly clad optical fiber (2) and the second active doubly clad optical fiber (9) adopted the welding mode.
9. like the high power wideband A SE light source of each described a kind of 1064nm wave band of claim 1 ~ 8, it is characterized in that: the first active doubly clad optical fiber (2) and the second active doubly clad optical fiber (9) are for mixing the active doubly clad optical fiber of ytterbium (2).
10. like the high power wideband A SE light source of each described a kind of 1064nm wave band of claim 1 ~ 8, it is characterized in that: the pumping wavelength of said semiconductor pump laser is 800 ~ 1100nm.
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Cited By (7)
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| CN103117502A (en) * | 2013-01-24 | 2013-05-22 | 中国电子科技集团公司第十一研究所 | Fiber optic amplifier and output control method thereof |
| CN103269011A (en) * | 2013-05-28 | 2013-08-28 | 山东海富光子科技股份有限公司 | High-energy pulse type full-fiber ASE source |
| CN103311781A (en) * | 2013-05-28 | 2013-09-18 | 山东海富光子科技股份有限公司 | Pulse type all-fiber ASE (Amplified Spontaneous Emission) source |
| CN104434018A (en) * | 2013-09-14 | 2015-03-25 | 明达医学科技股份有限公司 | Light source module of optical device and operation method thereof |
| CN105140764A (en) * | 2015-09-04 | 2015-12-09 | 华南理工大学 | Tunable bandwidth ASE light source |
| EP2908088A4 (en) * | 2012-12-13 | 2016-03-23 | Toyo Seikan Group Holdings Ltd | Method and device for measuring polishing amount of optical fiber component |
| CN110600982A (en) * | 2019-08-14 | 2019-12-20 | 武汉光迅科技股份有限公司 | Remote pumping system capable of improving pumping fiber-entering power |
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| CN202616595U (en) * | 2012-02-02 | 2012-12-19 | 华南理工大学 | High power broadband amplified spontaneous emission (ASE) light source of 1064 nm wave band |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2908088A4 (en) * | 2012-12-13 | 2016-03-23 | Toyo Seikan Group Holdings Ltd | Method and device for measuring polishing amount of optical fiber component |
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| CN103269011A (en) * | 2013-05-28 | 2013-08-28 | 山东海富光子科技股份有限公司 | High-energy pulse type full-fiber ASE source |
| CN103311781A (en) * | 2013-05-28 | 2013-09-18 | 山东海富光子科技股份有限公司 | Pulse type all-fiber ASE (Amplified Spontaneous Emission) source |
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| CN104434018A (en) * | 2013-09-14 | 2015-03-25 | 明达医学科技股份有限公司 | Light source module of optical device and operation method thereof |
| CN104434018B (en) * | 2013-09-14 | 2016-08-17 | 明达医学科技股份有限公司 | Light source module of optical device and operation method thereof |
| CN105140764A (en) * | 2015-09-04 | 2015-12-09 | 华南理工大学 | Tunable bandwidth ASE light source |
| CN110600982A (en) * | 2019-08-14 | 2019-12-20 | 武汉光迅科技股份有限公司 | Remote pumping system capable of improving pumping fiber-entering power |
| WO2021027207A1 (en) * | 2019-08-14 | 2021-02-18 | 武汉光迅科技股份有限公司 | Remote pumping system capable of improving input pumping power |
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