CN102252834B - Photon darkening test system for gain fiber - Google Patents
Photon darkening test system for gain fiber Download PDFInfo
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- CN102252834B CN102252834B CN2011101768221A CN201110176822A CN102252834B CN 102252834 B CN102252834 B CN 102252834B CN 2011101768221 A CN2011101768221 A CN 2011101768221A CN 201110176822 A CN201110176822 A CN 201110176822A CN 102252834 B CN102252834 B CN 102252834B
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Abstract
The invention relates to a photon darkening test system for gain fiber, wherein a pigtailed red light source is connected with a pigtailed optoisolator through fibers, the pigtailed optoisolator is welded with the input end signal fiber of a fiber coupler, a pigtailed semiconductor laser is fused with the input end pumped fiber of the fiber coupler, the output end signal fiber of the fiber coupler is fused with one end of the tested gain fiber, the other end of the tested gain fiber is cut into a plane, and an output beam is collimated by a collimating lens, then sequentially runs through a semiconductor laser output wavelength optical filter, a gain fiber excitation wavelength optical filter and a narrow band optical filter and then enters a power detector. The system is simple, convenient and reliable, can be used for effectively detecting a t photon darkening effect of the gain fiber and guiding the gain fiber to select a suitable doping concentration, and has very important significance in researching the gain fiber with high efficiency and low photon darkening effect.
Description
Technical field
The invention belongs to the optic fibre manufacturing technology field, relate to the gain fibre photon that a kind of photon that is used to test gain fibre secretly changes effect and secretly change test macro, instruct development high-level efficiency, low photon secretly to change the gain fibre of effect.
Background technology
Gain fibre is the gain media of fiber laser, and mixing the rare earth fibre core is its gain region.Because fiber laser has little, in light weight, the advantages such as efficient is high, good beam quality of volume, has been widely used in fields such as industrial processes, scientific research, military affairs.For obtaining high power optical fibre laser output, need to suppress various nonlinear effects, like stimulated Brillouin scattering (SBS), stimulated Raman scattering (SRS) etc., just need to adopt short as far as possible optical fiber, improve the doping content of gain fibre simultaneously.
Photon is secretly changed (photo darkening) and is meant when gain fibre excites with certain wavelength, occurs the phenomenon of energy loss in the optical fiber during Laser Transmission, and this phenomenon as is mixed ytterbium, mixes thulium, mixed praseodymium optical fiber etc. in many doped gain fiber.It will directly cause the permanent degeneration of gain fibre, and its forming process is irreversible.The doping content of gain fibre is big more, and its darkization of photon is also obvious more, and the generation of darkization of photon will significantly to shorten with the gain fibre be the serviceable life of the fiber laser of gain media.
Therefore, realize high-capacity optical fiber laser, will make the doping content of gain fibre obtain certain balance, can suppress the various nonlinear effects of gain fibre, guarantee that again it has less photon and secretly changes effect.But secretly change effect for the photon of gain fibre at present, still do not have reliable method of testing.
Summary of the invention
The object of the invention provides a kind of gain fibre photon secretly to change test macro; It is easy to be reliable that gain fibre photon of the present invention is secretly changed test macro; The photon that can effectively detect gain fibre is secretly changed effect and is and guided gain fibre to select suitable doping content, and the effect of gain fibre secretly change to(for) development high-level efficiency, low photon has very important significance.
Technical scheme of the present invention is:
The gain fibre photon is secretly changed test macro, comprises the fine red-light source of magnetic tape trailer, the fine optoisolator of magnetic tape trailer, the fine semiconductor laser of magnetic tape trailer, fiber coupler, tested gain fibre, collimation lens, semiconductor laser output wavelength optical filter, gain fibre excitation wavelength optical filter, narrow-band optical filter, power detector; The fine red-light source of magnetic tape trailer links to each other through the fine optoisolator of optical fiber and magnetic tape trailer; The input end signal optical fiber welding mutually of the fine optoisolator of magnetic tape trailer and fiber coupler; The input end pumping optical fiber welding mutually of the fine semiconductor laser of magnetic tape trailer and fiber coupler; The output end signal optical fiber of fiber coupler and the welding mutually of tested gain fibre one end; The other end of tested gain fibre cuts into the plane, and output beam is behind the collimation lens collimation, successively through getting into power detector behind semiconductor laser output wavelength optical filter, gain fibre excitation wavelength optical filter, the narrow-band optical filter.
The fine red-light source of described magnetic tape trailer is a visible red, and wavelength is the ruddiness of 630nm-650nm.
The fine optoisolator of described magnetic tape trailer inserts loss less than 1.5dB to the forward of 630nm-650nm ruddiness, and the reverse isolation degree guarantees the safe operation of the fine 630nm-650nm nm of magnetic tape trailer red-light source greater than 30dB.
The output wavelength of the fine semiconductor laser of described magnetic tape trailer is done corresponding selection according to the doped dielectric of gain fibre.As to Yb dosed optical fiber, can select wavelength for use is the semiconductor laser of 915nm or 976nm; To thulium doped fiber, selecting wavelength for use is the semiconductor laser of 790nm.
Described fiber coupler input end has signal optical fibre and pumping optical fiber, its signal optical fibre and the welding mutually of the fine optoisolator of magnetic tape trailer, and the fine semiconductor laser of its pumping optical fiber and magnetic tape trailer is welded together.
Described tested gain fibre is a rare earth doped fiber, as mixes ytterbium, mixes thulium, mixes praseodymium optical fiber etc.
Described collimation lens is plano-convex lens or convex lens, and the gain fibre outgoing beam is collimated.
Described semiconductor laser output wavelength optical filter noise spectra of semiconductor lasers output wavelength reflection of light rate greater than 99.9%, is used for the light of the remaining semiconductor laser output wavelength of filtering to other wavelength light transmitance greater than 99.9%.
Described gain fibre excitation wavelength optical filter, to gain fibre excitation wavelength reflection of light rate greater than 99.9%, to other wavelength light transmitance greater than 99.9%.Its wavelength is selected according to the excitation wavelength of doped gain fiber, and as to Yb dosed optical fiber, the reflectivity of 8 pairs of 1000nm-1200nm wavelength light of wave filter is greater than 99.9%, to other wavelength light transmitance greater than 99.9%.
The bandwidth of described narrow-band optical filter is less than 1nm, to the transmitance of 630nm-650nm wave band greater than 99.9%, to other wavelength light reflectivity greater than 99.9%.
Described power detector is the existing power detector that comprises photoelectric probe and data acquisition system (DAS), is used to detect the also power data of real time record incident beam, and the line data of going forward side by side is handled.
It is easy to be reliable that gain fibre photon of the present invention is secretly changed test macro; The photon that can effectively detect gain fibre is secretly changed effect and is and guided gain fibre to select suitable doping content, and the effect of gain fibre secretly change to(for) development high-level efficiency, low photon has very important significance.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 secretly changes effect figure as a result for adopting the various dissimilar photons of mixing the ytterbium gain fibre that test out of the present invention.
Embodiment
In conjunction with accompanying drawing the present invention is done further description.
As shown in Figure 1, the present invention includes magnetic tape trailer fibre 633nm red-light source 1, the fine optoisolator 2 of magnetic tape trailer, the fine semiconductor laser 3 of magnetic tape trailer, fiber coupler 4, tested gain fibre 5, collimation lens 6, semiconductor laser output wavelength optical filter 7, gain fibre excitation wavelength optical filter 8,633nm narrow-band optical filter 9, power detector 10; The fine 633nm red-light source 1 of magnetic tape trailer links to each other through the fine optoisolator 2 of optical fiber and magnetic tape trailer; The input end signal optical fiber welding mutually of the fine optoisolator 2 of magnetic tape trailer and fiber coupler 4; The input end pumping optical fiber welding mutually of the fine semiconductor laser 3 of magnetic tape trailer and fiber coupler 4; The output end signal optical fiber of fiber coupler 4 and the welding mutually of tested gain fibre 5 one ends; The other end of tested gain fibre 5 cuts into the plane, and output beam is parallel beam behind collimation lens 6 collimations, the light that light that this moment, collimated light beam comprised that 633nm ruddiness, the fine semiconductor laser of magnetic tape trailer sent has not been absorbed by tested gain fibre 5 and tested gain fibre 5 are excited; Collimated light beam is earlier through semiconductor laser output wavelength optical filter 7, the light of the semiconductor laser output wavelength that filtering is remaining; The light that is excited through the tested gain fibre 5 of gain fibre excitation wavelength optical filter 8 filterings again; At last through to the transmitance of 633nm wave band greater than 99.9% 633nm narrow-band optical filter 9, adopt the power and the real-time recorded data of power detector 10 measuring beams, carry out data processing at last.
The forward of 2 pairs of 633nm ruddiness of the fine optoisolator of described magnetic tape trailer inserts loss less than 1.5dB, and the reverse isolation degree guarantees the safe operation of the fine 633nm red-light source 1 of magnetic tape trailer greater than 30dB.The fine semiconductor laser 3 of described magnetic tape trailer, its output wavelength is done corresponding selection according to the doped dielectric of gain fibre.As to Yb dosed optical fiber, can select wavelength for use is the semiconductor laser of 915nm or 976nm; To thulium doped fiber, selecting wavelength for use is the semiconductor laser of 790nm.Described tested gain fibre 5 is a rare earth doped fiber, as mixes ytterbium, mixes thulium, mixes praseodymium optical fiber etc.Described collimation lens 6 is plano-convex lens or convex lens, and the gain fibre outgoing beam is collimated.Described semiconductor laser output wavelength optical filter 7 noise spectra of semiconductor lasers output wavelength reflection of light rates greater than 99.9%, are used for the light of the remaining semiconductor laser output wavelength of filtering to other wavelength light transmitance greater than 99.9%.Described gain fibre excitation wavelength optical filter 8, to gain fibre excitation wavelength reflection of light rate greater than 99.9%, to other wavelength light transmitance greater than 99.9%.Its wavelength is selected according to the excitation wavelength of doped gain fiber, and as to Yb dosed optical fiber, the reflectivity of 8 pairs of 1000nm-1200nm wavelength light of wave filter is greater than 99.9%, to other wavelength light transmitance greater than 99.9%.
Described power detector 10 is the existing power detector that comprises photoelectric probe and data acquisition system (DAS), is used to detect the also power data of real time record incident beam, and the line data of going forward side by side is handled.
To mix the ytterbium gain fibre is example, according to above-mentioned put up test platform after, open the fine 633nm red-light source 1 of magnetic tape trailer earlier, power detector 10 can detect the 633nm red signal light subsequently; Open the fine semiconductor laser 3 of magnetic tape trailer then, the 633nm red signal light power that power detector 10 is detected can change, and gathers time dependent power data in real time, and it is carried out data analysis.Fig. 2 is that the various dissimilar photons of mixing the ytterbium gain fibre that tested out are secretly changed effect figure as a result, and the 633nm ruddiness power that detects descends soon more in time, and then secretly to change effect big more for its photon.
Claims (2)
1. the gain fibre photon is secretly changed test macro; Comprise the fine red-light source (1) of magnetic tape trailer, the fine optoisolator (2) of magnetic tape trailer, the fine semiconductor laser (3) of magnetic tape trailer, fiber coupler (4), tested gain fibre (5), collimation lens (6), the fine semiconductor laser output wavelength optical filter (7) of magnetic tape trailer, gain fibre excitation wavelength optical filter (8), narrow-band optical filter (9) and power detector (10); It is characterized in that: the fine red-light source of magnetic tape trailer (1) links to each other with the fine optoisolator of magnetic tape trailer (2) through optical fiber; The input end signal optical fiber welding mutually of the fine optoisolator of magnetic tape trailer (2) and fiber coupler (4); The input end pumping optical fiber welding mutually of the fine semiconductor laser of magnetic tape trailer (3) and fiber coupler (4); The output end signal optical fiber of fiber coupler (4) and tested gain fibre (5) one end weldings mutually; The other end of tested gain fibre (5) cuts into the plane; And output beam passes through the fine semiconductor laser output wavelength optical filter (7) of magnetic tape trailer, gain fibre excitation wavelength optical filter (8), narrow-band optical filter (9) back entering power detector (10) successively behind collimation lens (6) collimation.
2. gain fibre photon according to claim 1 is secretly changed test macro, it is characterized in that: the fine red-light source of described magnetic tape trailer (1) is a visible red, and wavelength is the ruddiness of 630nm-650nm.
3, gain fibre photon according to claim 1 is secretly changed test macro, it is characterized in that: the fine optoisolator of described magnetic tape trailer (2) inserts loss less than 1.5dB to the forward of the ruddiness of 630nm-650nm, and the reverse isolation degree is greater than 30dB.
4, gain fibre photon according to claim 1 is secretly changed test macro; It is characterized in that: the output wavelength of the fine semiconductor laser of described magnetic tape trailer (3) is done corresponding selection according to the doped dielectric of gain fibre; To the gain fibre of Yb dosed optical fiber, selecting wavelength for use is the fine semiconductor laser of magnetic tape trailer of 915nm or 976nm; To the gain fibre of thulium doped fiber, selecting wavelength for use is the fine semiconductor laser of magnetic tape trailer of 790nm.
5, gain fibre photon according to claim 1 is secretly changed test macro; It is characterized in that: fine semiconductor laser output wavelength optical filter (7) the noise spectra of semiconductor lasers output wavelength of described magnetic tape trailer reflection of light rate is greater than 99.9%, to other wavelength light transmitance greater than 99.9%.
6, gain fibre photon according to claim 1 is secretly changed test macro; It is characterized in that: described gain fibre excitation wavelength optical filter (8) to gain fibre excitation wavelength reflection of light rate greater than 99.9%, to other wavelength light transmitance greater than 99.9%.
7, gain fibre photon according to claim 1 is secretly changed test macro; It is characterized in that: the bandwidth of described narrow-band optical filter (9) is less than 1nm; To the transmitance of 630nm-650nm wave band greater than 99.9%, to other wavelength light reflectivity greater than 99.9%.
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| CN2011101768221A CN102252834B (en) | 2011-06-28 | 2011-06-28 | Photon darkening test system for gain fiber |
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| CN102853996B (en) * | 2012-08-17 | 2014-10-29 | 华中科技大学 | Photon darkening test device of active rare earth doped fiber |
| CN106197951B (en) * | 2016-07-25 | 2018-09-18 | 长飞光纤光缆股份有限公司 | A kind of Active Optical Fiber photon darkens the circuit system of test |
| CN106226035B (en) * | 2016-07-25 | 2019-05-31 | 长飞光纤光缆股份有限公司 | A kind of Yb dosed optical fiber photon darkening test macro |
| CN113281015A (en) * | 2021-06-01 | 2021-08-20 | 江苏亨通光纤科技有限公司 | Rare earth doped optical fiber photodarkening testing device |
| CN113567089B (en) * | 2021-09-23 | 2022-01-11 | 武汉锐科光纤激光技术股份有限公司 | Double-cladding active optical fiber automatic testing device and method for optical fiber laser |
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| DE1911956A1 (en) * | 1969-03-10 | 1970-09-24 | Leitz Ernst Gmbh | Photoelectric device for the contactless determination of small changes in position or angle of objects |
| CN2879176Y (en) * | 2005-09-22 | 2007-03-14 | 中国计量学院 | Device for measuring Raman plus coefficient of optical fiber |
| CN101217319A (en) * | 2008-01-10 | 2008-07-09 | 复旦大学 | A gain controllable two-segment erbium-doped optical fiber amplifier |
| CN100589296C (en) * | 2008-05-13 | 2010-02-10 | 武汉锐科光纤激光器技术有限责任公司 | Acousto-optic modulator used for high power pulse optical fiber |
| CN201490563U (en) * | 2008-11-17 | 2010-05-26 | 武汉锐科光纤激光器技术有限责任公司 | 100 W continuous all-fiber laser |
| CN101640367B (en) * | 2008-11-17 | 2011-07-20 | 武汉锐科光纤激光器技术有限责任公司 | Pulse full-fiber laser |
| US20100254657A1 (en) * | 2009-04-01 | 2010-10-07 | Cao Group, Inc. | Attenuator coupling for laser systems |
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Owner name: WUHAN RUIXIN SPECIAL OPTICAL FIBER LLC Free format text: FORMER OWNER: WUHAN RAYCUS FIBER LASER TECHNOLOGIES CO., LTD. Effective date: 20150325 |
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Effective date of registration: 20150325 Address after: 430075, No. 999, hi tech Road, East Lake New Technology Development Zone, Hubei, Wuhan, No. 2, zone 803, future science and Technology City, C Patentee after: Wuhan Rui Xin special optical fiber Ltd Address before: 430074, building 10, innovation base, science and Technology Park, Huazhong University of Science and Technology, East Lake New Technology Development Zone, Wuhan, Hubei Patentee before: Wuhan Raycus Fiber Laser Technologies Co., Ltd. |