CN101706599A - Broadband optical-fiber source - Google Patents
Broadband optical-fiber source Download PDFInfo
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- CN101706599A CN101706599A CN200910108881A CN200910108881A CN101706599A CN 101706599 A CN101706599 A CN 101706599A CN 200910108881 A CN200910108881 A CN 200910108881A CN 200910108881 A CN200910108881 A CN 200910108881A CN 101706599 A CN101706599 A CN 101706599A
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Abstract
The invention is applied in the fields of fiber optical sensors, optical fiber gyros, optical fiber communication and the like, and provides a broadband optical-fiber source. The broadband optical-fiber source comprises a wavelength division multiplexer, a pump laser connected with an input end of the wavelength division multiplexer and a first optoisolator connected with a second output end of the wavelength division multiplexer. The broadband optical-fiber source also comprises a photonic crystal fiber connected with a first output end of the wavelength division multiplexer, wherein the photonic crystal fiber further comprises a fiber core and a covering which covers the fiber core; and the covering is provided with air vent holes. The broadband optical-fiber source provided by the invention adopts the photonic crystal fiber with the air vent holes, and the fiber core can be doped with small amount of or not be doped with coloring ions, such as germanium and the like, thus loss caused by radiation is reduced and the broadband optical-fiber source has relatively higher radiation resistance; and simultaneously, the photonic crystal fiber has a better temperature characteristic.
Description
Technical field
The invention belongs to fields such as Fibre Optical Sensor, optical fibre gyro and optical fiber communication, relate in particular to a kind of broadband optical-fiber source.
Background technology
In optical fiber source, the silicon core of mixing germanium is 20～50 times of pure silicon core by radiation-induced loss, and radiation-induced loss is owing to formed the look core in optical fiber; The look core is that the electronics and the hole of trapped radiation produce by the doping of fault of construction charged in the material (as no oxo bridge, silicon silicon key etc.) and material itself, impure etc.In the silicon core fibre of doped germanium element, Ge element provides trapping region large-area, high concentration, thereby mainly be by the look core decision relevant with Ge element by radiation-induced loss, also relevant simultaneously with the concentration of germanium.
For refractive index and the numerical aperture that improves fibre core, doped germanium element in fibre core usually, however the doping of Ge element can reduce the radiation resistance of optical fiber.
Simultaneously, the factor that influences the wideband light source temperature stability comprises: the temperature sensitivity of optical fiber itself, pumping wavelength, pump power and light feedback etc., wherein the intrinsic temperature coefficient of optical fiber is the factor that has the greatest impact.And the material that common optical fiber coating is used is an acrylates, and acrylates is being rendered as vitreousness below-20 ℃, greatly reduces the polarization maintenance, thereby influences the temperature characterisitic of light source.
Summary of the invention
The purpose of the embodiment of the invention is to overcome the deficiency of existing light source technology, and a kind of broadband optical-fiber source is provided.
The embodiment of the invention is to realize like this, a kind of broadband optical-fiber source, comprise wavelength division multiplexer, the pump laser that is connected with the input end of described wavelength division multiplexer, with first optoisolator that second output terminal of described wavelength division multiplexer is connected, described broadband optical-fiber source also comprises: the photonic crystal fiber that is connected with first output terminal of described wavelength division multiplexer; Described photonic crystal fiber further comprises fibre core and coats the covering of described fibre core that described covering has airport.
Wherein, described airport periodicity uniform ring is outside described fibre core.
Wherein, described airport is circular airport, and the diameter of described each circular airport is identical.
Wherein, the spacing between described per two adjacent circular airports is greater than the diameter of a circular airport.
Wherein, described airport is arranged in a regular hexagon.
Wherein, described broadband optical-fiber source also comprises: wave filter, be connected with described first optoisolator, and the light signal that described first optoisolator is exported carries out exporting after the filtering.
Wherein, adopt the tail optical fiber fusing mode to be connected between described wavelength division multiplexer and described pump laser, first optoisolator and the described photonic crystal fiber.
Wherein, described fibre core is formed by the quartz material of doped with rare-earth elements.
Wherein, the Doped Rare Earth element is an erbium in the described fibre core.
The broadband optical-fiber source that the embodiment of the invention provides adopts the photonic crystal fiber with airport, and " painted " ions such as Ge element can be mixed or not mix to fibre core less, reduces radiation-induced loss, has higher radiation resistance; Photonic crystal fiber has better temperature characterisitic simultaneously.
Description of drawings
Fig. 1 is to the structural drawing of the broadband optical-fiber source of structure after the one way that provides of the embodiment of the invention;
Fig. 2 is the end view drawing of the photonic crystal fiber with circular airport that provides of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The broadband optical-fiber source that the embodiment of the invention provides can be applied to Fibre Optical Sensor and optical-fibre communications field.Fig. 1 shows after the one way that the embodiment of the invention provides the structure to the broadband optical-fiber source of structure, for convenience of explanation, only shows the part relevant with the embodiment of the invention, and details are as follows.
Have that the broadband optical-fiber source to structure comprises pump laser 1, wavelength division multiplexer 2, photonic crystal fiber 3 and first optoisolator 4 after the one way; Wherein, pump laser 1 is connected with the input end 20 of wavelength division multiplexer 2; Photonic crystal fiber 3 is connected with first output terminal 21 of wavelength division multiplexer 2; First optoisolator 4 is connected with second output terminal 22 of wavelength division multiplexer 2; The 3rd output terminal 23 of wavelength division multiplexer 2 is unsettled not to be connect; Photonic crystal fiber 3 further comprises: the covering of fibre core and coating fibre core, covering has airport.
In embodiments of the present invention, airport periodicity uniform ring is outside fibre core.
As one embodiment of the present of invention, broadband optical-fiber source also comprises: wave filter 5, be connected with first optoisolator 4, and the light signal that first optoisolator 4 is exported carries out exporting after the filtering.
As an alternative embodiment of the invention, broadband optical-fiber source also comprises: second optoisolator 6 is connected with photonic crystal fiber 3.
In embodiments of the present invention, all adopt the tail optical fiber fusing mode to connect in pump laser 1, wavelength division multiplexer 2, photonic crystal fiber 3, wave filter 5, first optoisolator 4 and second optoisolator 6 between each device.
The pump light that pump laser 1 sends is behind the photonic crystal fiber 3 gain active medium of wavelength division multiplexer 2 couplings, by the stable wide band super fluorescence spectrum of wave filter 5 final acquisitions.Now in conjunction with Fig. 1 in detail principle of work from the one way to the broadband optical-fiber source of structure that have after is described in detail: the pump light that pump laser 1 sends is through input end 20 inputs of wavelength division multiplexer 2; First output terminal 21 by wavelength division multiplexer 2 enters in the photonic crystal fiber 3, erbium ion in the pump photon crystal optical fibre 3, produce the back to the 1550nm wide band super fluorescence, by second output terminal, 22 outputs of wavelength division multiplexer 2, respectively through first optoisolator 4 and the smooth superfluorescence of wave filter 5 back outputs.
As one embodiment of the present of invention, have that the broadband optical-fiber source to structure adopts the photonic crystal fiber with airport after the one way, can come output spectrum is optimized by the length of design photonic crystal fiber and the parameter of optoisolator, thereby make temperature stability better, simple in structure.
In embodiments of the present invention, airport can be the geometric figure of circular, square or other any rule; Simultaneously, a plurality of airports can be arranged in Any shape.Adopt photonic crystal fiber to be illustrated in the embodiment of the invention with circular airport.Fig. 2 shows the end face of the photonic crystal fiber with circular airport, for convenience of explanation, only shows the part relevant with the embodiment of the invention, and details are as follows.
Photonic crystal fiber 3 comprises: the covering 32 of fibre core 30, coating fibre core 30; Wherein covering 32 has airport 31. airports 31 periodicity uniform ring outside fibre core 30, and airport 31 can be circular airport, and the diameter of each circular airport is identical; Spacing 33 between per two adjacent circular airports is greater than the diameter of a circular airport.
A plurality of airports in the photonic crystal fiber that the embodiment of the invention provides are arranged in a regular hexagon.
As one embodiment of the present of invention, fibre core 30 is formed by the quartz material of doped with rare-earth elements; The Doped Rare Earth element is an erbium.
In embodiments of the present invention, parameters such as airport diameter, airport spacing 33 and the airport number of plies that can flexible design fibre cladding zone change the effective refractive index of covering, thereby change the numerical aperture of optical fiber.As one embodiment of the present of invention, the diameter of fibre core 30 is about 5.5 μ m, and the diameter of each circular airport 31 is 1.8 μ m-2 μ m, and the spacing 33 between per two adjacent circular airports 31 is about 4 μ m; A plurality of circular airports are center outside expansion in layer with fibre core 30, and for reducing leakage losses, airport 31 is at least three layers.
The light source that the embodiment of the invention provides adopts photonic crystal fiber to improve capability of resistance to radiation; Because the influence of light source raying mainly concentrates on optical fiber, adopt photonic crystal fiber to replace ordinary optic fibre, and the special construction of photonic crystal fiber, promptly can reduce the concentration of " painted " ions such as germanium ion, thereby improve the capability of resistance to radiation of light source at fibre core.Photonic crystal fiber has temperature characterisitic preferably simultaneously, thereby improves the temperature stability of light source.
The er-doped photonic crystal fiber light source that the embodiment of the invention provides has multiple structure; the above only is preferred embodiment of the present invention; not in order to restriction the present invention; all any modifications of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. broadband optical-fiber source, comprise wavelength division multiplexer, the pump laser that is connected with the input end of described wavelength division multiplexer, first optoisolator that is connected with second output terminal of described wavelength division multiplexer, it is characterized in that described broadband optical-fiber source also comprises: the photonic crystal fiber that is connected with first output terminal of described wavelength division multiplexer; Described photonic crystal fiber further comprises fibre core and coats the covering of described fibre core that described covering has airport.
2. broadband optical-fiber source as claimed in claim 1 is characterized in that, described airport periodicity uniform ring is outside described fibre core.
3. broadband optical-fiber source as claimed in claim 1 is characterized in that, described airport is circular airport, and the diameter of described each circular airport is identical.
4. broadband optical-fiber source as claimed in claim 3 is characterized in that, the spacing between described per two adjacent circular airports is greater than the diameter of a circular airport.
5. broadband optical-fiber source as claimed in claim 1 is characterized in that, described airport is arranged in a regular hexagon.
6. broadband optical-fiber source as claimed in claim 1 is characterized in that, described broadband optical-fiber source also comprises: wave filter, be connected with described first optoisolator, and the light signal that described first optoisolator is exported carries out exporting after the filtering.
7. broadband optical-fiber source as claimed in claim 1 is characterized in that, adopts the tail optical fiber fusing mode to be connected between described wavelength division multiplexer and described pump laser, first optoisolator and the described photonic crystal fiber.
8. broadband optical-fiber source as claimed in claim 1 is characterized in that described fibre core is formed by the quartz material of doped with rare-earth elements.
9. broadband optical-fiber source as claimed in claim 8 is characterized in that, the Doped Rare Earth element is an erbium in the described fibre core.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910108881A CN101706599A (en) | 2009-08-11 | 2009-08-11 | Broadband optical-fiber source |
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| CN200910108881A CN101706599A (en) | 2009-08-11 | 2009-08-11 | Broadband optical-fiber source |
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| CN101706599A true CN101706599A (en) | 2010-05-12 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344231A (en) * | 2013-06-28 | 2013-10-09 | 哈尔滨工程大学 | Polarization-maintaining photonic crystal optical-fiber gyroscope device |
| CN105807365A (en) * | 2016-05-31 | 2016-07-27 | 中国工程物理研究院激光聚变研究中心 | Photonic crystal fiber |
| CN110707516A (en) * | 2019-10-11 | 2020-01-17 | 中国船舶重工集团公司第七0七研究所 | Erbium-doped optical fiber light source outputting high power after single pass |
| CN111443423A (en) * | 2020-03-12 | 2020-07-24 | 烽火通信科技股份有限公司 | Radiation-resistant polarization-maintaining optical fiber and preparation method and application thereof |
-
2009
- 2009-08-11 CN CN200910108881A patent/CN101706599A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344231A (en) * | 2013-06-28 | 2013-10-09 | 哈尔滨工程大学 | Polarization-maintaining photonic crystal optical-fiber gyroscope device |
| CN103344231B (en) * | 2013-06-28 | 2015-12-09 | 哈尔滨工程大学 | A kind of polarization-maintaiphotonic photonic crystal optical-fiber gyroscope device |
| CN105807365A (en) * | 2016-05-31 | 2016-07-27 | 中国工程物理研究院激光聚变研究中心 | Photonic crystal fiber |
| CN110707516A (en) * | 2019-10-11 | 2020-01-17 | 中国船舶重工集团公司第七0七研究所 | Erbium-doped optical fiber light source outputting high power after single pass |
| CN111443423A (en) * | 2020-03-12 | 2020-07-24 | 烽火通信科技股份有限公司 | Radiation-resistant polarization-maintaining optical fiber and preparation method and application thereof |
| CN111443423B (en) * | 2020-03-12 | 2022-03-11 | 烽火通信科技股份有限公司 | Radiation-resistant polarization-maintaining optical fiber and preparation method and application thereof |
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Open date: 20100512 |