CN101707323A - ASE light source - Google Patents
ASE light source Download PDFInfo
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- CN101707323A CN101707323A CN200910108882A CN200910108882A CN101707323A CN 101707323 A CN101707323 A CN 101707323A CN 200910108882 A CN200910108882 A CN 200910108882A CN 200910108882 A CN200910108882 A CN 200910108882A CN 101707323 A CN101707323 A CN 101707323A
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- light source
- ase light
- wavelength division
- division multiplexer
- fibre core
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Abstract
The invention is applicable to the fields of optical fiber sensing, an optical fiber gyro, optical fiber communication and the like, and provides an ASE light source which comprises a wavelength division multiplexer, a pump laser connected with an input end of the wavelength division multiplexer, a first opto-isolator connected with a second output end of the wavelength division multiplexer, and a photonic crystal optical fiber connected with a first output end of the wavelength division multiplexer, wherein the photonic crystal optical fiber further comprises a fiber core and a cladding layer used for covering the fiber core; and the cladding layer is provided with a shaddock-shaped air vent hole. By adopting the photonic crystal optical fiber provided with the shaddock-shaped air vent hole, the ASE light source reduces the effective refractive index of the cladding layer so as to lead greater refractive index difference to be formed between the fiber core and the cladding layer, has stronger constraint capability for electromagnetic field, reduces the bending loss and decreases the size of an optical fiber light source.
Description
Technical field
The invention belongs to fields such as optic fiber gyroscope, Fibre Optical Sensor and optical fiber communication, relate in particular to a kind of amplified spont-aneous emission (Amplified spontaneous emission, ASE) light source.
Background technology
In actual applications, when connecting up as transmission medium, optical fiber can't need bending with avoiding, it mainly is owing to caused deformation when crooked that traditional optical fiber produces bending loss, changed the relative index of refraction of geometry and the fibre core and the covering of optical fiber symmetry, thereby have influence on the cross direction profiles of optical fiber mode fields, and destroyed the total reflection condition of light wave along Optical Fiber Transmission, cause luminous energy to leak to covering even outer media.
Summary of the invention
The ASE light source that provides a kind of bending loss little is provided the purpose of the embodiment of the invention.
The embodiment of the invention is to realize like this, a kind of ASE light source, comprise wavelength division multiplexer, the pump laser that is connected with the input of described wavelength division multiplexer, with first optical isolator that second output of described wavelength division multiplexer is connected, described ASE light source also comprises: the photonic crystal fiber that is connected with first output 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 shaddock type airport.
Wherein, described shaddock type airport periodicity uniform ring is outside described fibre core.
Wherein, described shaddock type airport specifically is to be looped around an outer week of described fibre core.
Wherein, the area of the aporate area of described covering and the ratio of the area of hole area are less than 0.2.
Wherein, the refractive index of the aporate area of described covering is greater than the effective refractive index of hole area.
Wherein, described ASE light source also comprises: filter, be connected with described first optical isolator, and the light signal that described first optical isolator 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 optical isolator and the described photonic crystal fiber.
Wherein, described fibre core is positioned at the geometric center of described photonic crystal fiber, and 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 ASE light source that the embodiment of the invention provides adopts the photonic crystal fiber with shaddock type airport, has reduced the effective refractive index of covering, makes fibre core and covering form bigger refringence, and is stronger to the constraint ability of electromagnetic field, reduced bending loss.
Description of drawings
Fig. 1 is to the structure chart of the ASE of structure light source 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 shaddock type 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 ASE light source that the embodiment of the invention provides adopts the photonic crystal fiber with shaddock type airport, has reduced the bending loss of optical fiber source, strengthens ability of anti-deformation, reduces the size of light source.
The photonic crystal fiber wideband light 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 to the structure of the ASE of structure light source, for convenience of explanation, only shows the part relevant with the embodiment of the invention, and details are as follows.
Comprise pump laser 1, wavelength division multiplexer 2, photonic crystal fiber 3 and first optical isolator 4 to the ASE of structure light source after having one way; Wherein, pump laser 1 is connected with the input 20 of wavelength division multiplexer 2; Photonic crystal fiber 3 is connected with first output 21 of wavelength division multiplexer 2; First optical isolator 4 is connected with second output 22 of wavelength division multiplexer 2; The 3rd output 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 shaddock type airport.
In embodiments of the present invention, shaddock type airport periodicity uniform ring is outside fibre core; Wherein, shaddock type airport specifically is to be looped around an outer week of fibre core.
As one embodiment of the present of invention, the ratio of the area of the aporate area of covering and the area of hole area is less than 0.2, and the refractive index of the aporate area of covering is greater than the effective refractive index of hole area.Owing to the increase along with the fills with air ratio of the effective refractive index of covering reduces, thereby make fibre core and covering form bigger refringence, therefore stronger to the constraint ability of electromagnetic field, therefore, the counter-bending ability of optical fiber strengthens.
As one embodiment of the present of invention, the ASE light source also comprises: filter 5, be connected with first optical isolator 4, and the light signal that first optical isolator 4 is exported carries out exporting after the filtering.
As an alternative embodiment of the invention, the ASE light source also comprises: second optical isolator 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, filter 5, first optical isolator 4 and second optical isolator 6 between each device.
The pump light that pump laser 1 sends is behind the photonic crystal fiber 3 gain active mediums of wavelength division multiplexer 2 couplings, by filter 5 final acquisition high stable wide band super fluorescence radiation.Now in conjunction with Fig. 1 in detail operation principle from the one way to the ASE of structure light source that have after is described in detail: the pump light that pump laser 1 sends is through input 20 inputs of wavelength division multiplexer 2; First output 21 by wavelength division multiplexer 2 enters in the photonic crystal fiber 3, erbium ion in the pump photon crystal fiber 3, produce the back to the 1550nm wide band super fluorescence, by second output, 22 outputs of wavelength division multiplexer 2, respectively through first optical isolator 4 and the smooth superfluorescence of filter 5 back outputs.
As one embodiment of the present of invention, adopt photonic crystal fiber to the ASE of structure light source after having one way with shaddock type airport, can come the ASE spectrum of output is optimized by the length of design photonic crystal fiber and the parameter of optical isolator, thereby make light source stability better, simple in structure.
Fig. 2 shows the end face of the photonic crystal fiber with shaddock type 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 31 of fibre core 30, coating fibre core 30; Wherein covering 31 has shaddock type airport 32; Shaddock type airport 32 periodicity uniform ring are outside fibre core 30; Shaddock type airport 32 specifically is to be looped around 30 outer weeks of fibre core. adopt the airport 32 of this shaddock type to make the effective refractive index of covering 31 reduce along with the increase of fills with air ratio, thereby make fibre core 30 and covering 31 form bigger refringence, therefore stronger to the constraint ability of electromagnetic field, therefore, the counter-bending ability of optical fiber strengthens.
As one embodiment of the present of invention, fibre core 30 is positioned at the geometric center of photonic crystal fiber, 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 and the airport number of plies that can flexible design fiber cladding zone change the effective refractive index of covering, thereby change the numerical aperture of optical fiber.
The optical fiber source that the embodiment of the invention provides adopts the photonic crystal fiber with shaddock type airport, make the effective refractive index of cladding regions reduce along with the increase of fills with air ratio, thereby make fibre core and covering form bigger refringence, therefore stronger to the constraint ability of electromagnetic field, reduced the bending loss of optical fiber source, strengthen ability of anti-deformation, reduce the size of light source.
The ASE 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. ASE light source, comprise wavelength division multiplexer, the pump laser that is connected with the input of described wavelength division multiplexer, first optical isolator that is connected with second output of described wavelength division multiplexer, it is characterized in that described ASE light source also comprises: the photonic crystal fiber that is connected with first output 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 shaddock type airport.
2. ASE light source as claimed in claim 1 is characterized in that, described shaddock type airport periodicity uniform ring is outside described fibre core.
3. ASE light source as claimed in claim 2 is characterized in that, described shaddock type airport specifically is to be looped around an outer week of described fibre core.
4. ASE light source as claimed in claim 1 is characterized in that, the ratio of the area of the aporate area of described covering and the area of hole area is less than 0.2.
5. ASE light source as claimed in claim 1 is characterized in that the refractive index of the aporate area of described covering is greater than the effective refractive index of hole area.
6. ASE light source as claimed in claim 1 is characterized in that, described ASE light source also comprises: filter, be connected with described first optical isolator, and the light signal that described first optical isolator is exported carries out exporting after the filtering.
7. ASE light 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 optical isolator and the described photonic crystal fiber.
8. ASE light source as claimed in claim 1 is characterized in that described fibre core is positioned at the geometric center of described photonic crystal fiber, and described fibre core is formed by the quartz material of doped with rare-earth elements.
9. ASE light source as claimed in claim 8 is characterized in that, the Doped Rare Earth element is an erbium in the described fibre core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910108882A CN101707323A (en) | 2009-08-11 | 2009-08-11 | ASE light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910108882A CN101707323A (en) | 2009-08-11 | 2009-08-11 | ASE light source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101707323A true CN101707323A (en) | 2010-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910108882A Pending CN101707323A (en) | 2009-08-11 | 2009-08-11 | ASE light source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101707323A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472528A (en) * | 2013-09-30 | 2013-12-25 | 北京首量科技有限公司 | High-double-refraction photonic quasicrystal fiber with grapefruit air holes |
| 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 |
-
2009
- 2009-08-11 CN CN200910108882A patent/CN101707323A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472528A (en) * | 2013-09-30 | 2013-12-25 | 北京首量科技有限公司 | High-double-refraction photonic quasicrystal fiber with grapefruit air holes |
| CN103472528B (en) * | 2013-09-30 | 2016-03-30 | 北京首量科技有限公司 | The accurate brilliant optical fiber of a kind of high birefringence photon with grape fruit airport |
| 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 |
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Application publication date: 20100512 |