CN103682960A - Ultra-wideband light source - Google Patents

Abstract

The invention provides an ultra-wideband light source. a pump light transmitting device transmits pump light, and erbium-doped, thulium-doped and neodymium-doped (or dysprosium-doped, praseodymium-doped) fibers are pumped by the pump light transmitting device so as to respectively produce three paths of spontaneous emission. The three paths of spontaneous emission are respectively amplified under pumping of the pump light so as to form three paths of fluorescence. The three paths of fluorescence are coupled through an optical fiber coupler, and ultra-wideband fluorescence is obtained from an output end of the optical fiber coupler. The invention has beneficial effects as follows: by the use of the parallel structure of the first doped fiber, the second doped fiber and the third doped fiber, the ultra-wideband light source with bandwidth of 1100nm-1600nm can be realized. The ultra-wideband light source provided by the invention has a simple structure. In addition, the defect that an Er-Tm-Nd (or Dy, Pr)-doped fiber might cause mutual effect of three bands of electron transition is avoided. According to the invention, spectral efficiency is high.

Description

A kind of ultra broadband light source

Technical field

The invention belongs to optical transport technology field, be specifically related to a kind of ultra broadband light source.

Background technology

In recent ten years, the research of light source mainly concentrates on two aspects: the one, the research of the stable and super-fluorescence light source that bandwidth is larger of centre wavelength, the 2nd, spectrum smooth and bandwidth can cover the research of the smooth super-fluorescence light source in broadband of optical communication C-band and L-band.Up to the present, Er-doped fiber superfluorescence bandwidth only has 81nm left and right, can't meet the requirement of the more areas application such as broadband access and broadband medical science chromatography.

Because different rare earth ions has different emission spectras, if er-doped ion optical fiber emission spectra is at 1530nm wave band, mix thulium ion optical fiber emission spectra at 1470nm wave band, Nd ion doped or praseodymium ion or dysprosium ion optical fiber emission spectra are at 1310nm wave band etc., therefore by selecting different rare earth combined dopants can obtain full wave superfluorescence, export, to meet various application needs.Yet due to the existence of cross relaxation, three kinds of ion co-dopeds may make the electron transition of three wave bands influence each other, and cause the reduction of spectrum efficiency.

Summary of the invention

The defect that can not satisfy the demand in order to solve superfluorescence bandwidth of the prior art, the present invention aims to provide a kind of ultra broadband light source, and concrete technical scheme is as follows:

A ultra broadband light source, comprises pump light emitter, the first doped fiber, the second doped fiber, the 3rd doped fiber and fiber coupler; Wherein, the first doped fiber is the optical fiber of erbium ion of having adulterated, and the second doped fiber is the optical fiber of thulium ion of having adulterated, and the 3rd doped fiber is the optical fiber of a kind of ion in neodymium or dysprosium or praseodymium of having adulterated;

Pump light emitter is used for launching pump light, and pump light emitter is launched one end that three road pump lights enter respectively the first doped fiber, the second doped fiber and the 3rd doped fiber; Fiber coupler comprises input and output; The output of fiber coupler is as the transmitting terminal of this ultra broadband light source; The other end of the first doped fiber, the second doped fiber and the 3rd doped fiber is connected with the input of fiber coupler respectively.

Pump light emitter is launched respectively three road pump lights to the first doped fiber, the second doped fiber and the 3rd doped fiber, the first doped fiber, the second doped fiber and the 3rd doped fiber produce respectively three road spontaneous emission lights after receiving pump light, three road spontaneous emission lights are amplified respectively under the continuation pumping of pump light, form three road fluorescence, three road fluorescence are coupled by fiber coupler, at the output of fiber coupler, obtain ultra broadband fluorescence.

As prioritization scheme, pump light emitter comprise pump laser with and the pump light splitter that is connected with pump laser, pump light splitter is launched pump light by pump laser and is divided into three tunnels, inputs to respectively the first doped fiber, the second doped fiber and the 3rd doped fiber.

As prioritization scheme, pump laser is that wavelength is the pump laser diode of 793nm or 800nm or 808nm or 980nm.

As prioritization scheme, pump light emitter comprises the first pump laser, the second pump laser and the 3rd pump laser; The first pump laser, the second pump laser and the 3rd pump laser are launched respectively pump light to the first doped fiber, the second doped fiber and the 3rd doped fiber.

As prioritization scheme, the first pump laser is that wavelength is the pump laser diode of 793nm or 800nm or 808nm or 980nm.

As prioritization scheme, the second pump laser is that wavelength is the pump laser diode of 793nm or 800nm or 808nm or 980nm.

As prioritization scheme, the 3rd pump laser is that wavelength is the pump laser diode of 793nm or 800nm or 808nm or 980nm.

As prioritization scheme, in the first doped fiber, the doping content scope of erbium ion is 10 ²²-10 ²⁶individual/m ³, in the second doped fiber, the doping content scope of thulium ion is 10 ²²-10 ²⁶individual/m ³, in the 3rd doped fiber, the doping content scope of neodymium or dysprosium or praseodymium ion is 10 ²²-10 ²⁶individual/m ³.

As prioritization scheme, the length of the first doped fiber, the second doped fiber and the 3rd doped fiber is respectively 0.1-100m.

As prioritization scheme, described light source transmitting terminal transmitting boundary is at the ultra broadband fluorescence of 1100nm-1600nm.

Useful technique effect of the present invention is:

(1) the present invention uses the parallel-connection structure of the first doped fiber, the second doped fiber and three kinds of optical fiber of the 3rd doped fiber, can realize the ultra bandwidth superfluorescence source of 1100nm-1600nm bandwidth;

(2) the present invention is simple in structure, and has avoided three kinds of ion co-doped optical fiber of erbium, thulium and neodymium (or dysprosium or praseodymium) may make the interactional defect of electron transition of three wave bands, and spectrum efficiency is high.

Accompanying drawing explanation

By reference to the accompanying drawings, by detailed description below, can more clearly understand above-mentioned and other feature and advantage of the present invention, wherein:

Fig. 1 is the structural representation of the embodiment of the present invention 1;

Fig. 2 is the fluorescence Spectra of embodiment 1 first doped fiber end;

Fig. 3 is the fluorescence Spectra of embodiment 1 second doped fiber end;

Fig. 4 is the fluorescence Spectra of embodiment 1 the 3rd doped fiber end;

Fig. 5 is the fluorescence Spectra of embodiment 1 fiber coupler output;

Fig. 6 is the structural representation of the embodiment of the present invention 2;

Fig. 7 is the energy level transition schematic diagram of erbium ion;

Fig. 8 is the energy level transition schematic diagram of thulium ion;

Fig. 9 is the energy level transition schematic diagram of neodymium ion.

In upper figure, sequence number is:

1-the first doped fiber, 2-the second doped fiber, 3-the 3rd doped fiber, 4-pump laser, 5-pump light splitter, 6-fiber coupler, 7-the first pump laser, 8-the second pump laser, 9-the 3rd pump laser.

Embodiment

Below in conjunction with drawings and Examples, the present invention is further illustrated.

Embodiment 1:

As shown in Figure 1, a kind of ultra broadband light source, comprises pump light emitter, the first doped fiber 1, the second doped fiber 2, the 3rd doped fiber 3 and fiber coupler 6; Wherein, the first doped fiber is the optical fiber of erbium ion of having adulterated, and the second doped fiber is the optical fiber of thulium ion of having adulterated, and the 3rd doped fiber is the optical fiber of neodymium ion of having adulterated.Because Nd ion doped or praseodymium ion or dysprosium ion optical fiber emission spectra are all at 1310nm wave band, therefore, the 3rd doped fiber also can be the optical fiber of adulterated praseodymium ion or dysprosium ion.

Pump light emitter is used for launching pump light, and pump light emitter is launched one end that three road pump lights enter respectively the first doped fiber 1, the second doped fiber 2 and the 3rd doped fiber 3; Fiber coupler 6 comprises input and output; The output of fiber coupler 6 is as the transmitting terminal of this ultra broadband light source; The other end of the first doped fiber 1, the second doped fiber 2 and the 3rd doped fiber 3 is connected with the input of fiber coupler 6 respectively.

Pump light emitter is launched respectively three road pump lights to the first doped fiber 1, the second doped fiber 2 and the 3rd doped fiber 3, after receiving pump light, the first doped fiber 1, the second doped fiber 2 and the 3rd doped fiber 3 produce respectively three road spontaneous emission lights, three road spontaneous emission lights are amplified respectively under the continuation pumping of pump light, form three road fluorescence, three road fluorescence are coupled by fiber coupler 6, at the output of fiber coupler 6, obtain ultra broadband fluorescence.

In the present embodiment, pump light emitter comprise wavelength be 800nm pump laser 4 with and the pump light splitter 5 that is connected with pump laser, pump light splitter 5 is divided into three tunnels by pump laser 4 transmitting pump lights, inputs to respectively the first doped fiber 1, the second doped fiber 2 and neodymium ion doped optical fiber 3.

In the present embodiment, pump laser 4 is 1.0dB with the insertion loss of fiber coupler 6.Doping content is 1 * 10 ²⁴individual/m ³the first doped fiber 1, the second doped fiber 2 and the 3rd doped fiber 3 produce three tunnel spontaneous radiations, its centre wavelength is respectively at 1530nm, 1470nm and 1310nm left and right, its corresponding energy level transition is as shown in Fig. 7-Fig. 9.Choosing of the length of the first doped fiber 1, the second doped fiber 2 and the 3rd doped fiber 3 is relevant with the doping content of erbium, thulium and three kinds of ions of neodymium with the power of pump light, its design parameter is by separating the Rate equations (1) of following three kinds of ions, (2), the power delivery equation group (4) of (3) and three emission bands is determined:

$\begin{array}{c}\frac{\&PartialD;{\mathrm{<figure-callout\; id="1"\; label="N"\; filenames="131112142248.png,131112144540.png"\; state="\{\{state\}\}">N</figure-callout>}}_1}{\&PartialD;t}=-W_{14}{\mathrm{<figure-callout\; id="1"\; label="N"\; filenames="131112142248.png,131112144540.png"\; state="\{\{state\}\}">N</figure-callout>}}_1+A_{21}{\mathrm{<figure-callout\; id="2"\; label="N"\; filenames="131112142248.png"\; state="\{\{state\}\}">N</figure-callout>}}_2\\ \frac{\&PartialD;{\mathrm{<figure-callout\; id="2"\; label="N"\; filenames="131112142248.png"\; state="\{\{state\}\}">N</figure-callout>}}_2}{\&PartialD;t}=(W_{42}+A_{42})N_4-({\mathrm{<figure-callout\; id="24"\; label="W"\; filenames="131112144544.png"\; state="\{\{state\}\}">W</figure-callout>}}_{24}+A_{21}){\mathrm{<figure-callout\; id="2"\; label="N"\; filenames="131112142248.png"\; state="\{\{state\}\}">N</figure-callout>}}_2\\ \frac{\&PartialD;N_4}{\&PartialD;t}=W_{14}{\mathrm{<figure-callout\; id="1"\; label="N"\; filenames="131112142248.png,131112144540.png"\; state="\{\{state\}\}">N</figure-callout>}}_1+W_{24}{N}_2-(W_{42}+A_{42})N_4\\ N_{\mathrm{nd}}=N_1+{\mathrm{<figure-callout\; id="2"\; label="N"\; filenames="131112142248.png"\; state="\{\{state\}\}">N</figure-callout>}}_2+N_4\end{array}---\left(1\right)$

$\begin{array}{c}\frac{\&PartialD;{\mathrm{<figure-callout\; id="1"\; label="N"\; filenames="131112142248.png,131112144540.png"\; state="\{\{state\}\}">N</figure-callout>}}_1}{\&PartialD;t}=-(W_{14}+W_{12}){\mathrm{<figure-callout\; id="1"\; label="N"\; filenames="131112142248.png,131112144540.png"\; state="\{\{state\}\}">N</figure-callout>}}_1+(A_{21}+W_{21}){\mathrm{<figure-callout\; id="2"\; label="N"\; filenames="131112142248.png"\; state="\{\{state\}\}">N</figure-callout>}}_2\\ \frac{\&PartialD;{\mathrm{<figure-callout\; id="2"\; label="N"\; filenames="131112142248.png"\; state="\{\{state\}\}">N</figure-callout>}}_2}{\&PartialD;t}=(W_{42}+A_{42})N_4-(A_{21}+W_{21}+W_{24}){\mathrm{<figure-callout\; id="2"\; label="N"\; filenames="131112142248.png"\; state="\{\{state\}\}">N</figure-callout>}}_2\\ \frac{\&PartialD;N_4}{\&PartialD;t}=W_{14}{\mathrm{<figure-callout\; id="1"\; label="N"\; filenames="131112142248.png,131112144540.png"\; state="\{\{state\}\}">N</figure-callout>}}_1+W_{24}{N}_2-(W_{42}+A_{42})N_4\\ N_{\mathrm{tm}}={\mathrm{<figure-callout\; id="1"\; label="N"\; filenames="131112142248.png,131112144540.png"\; state="\{\{state\}\}">N</figure-callout>}}_1+N_2+N_4\end{array}---\left(2\right)$

$\begin{array}{c}\frac{\&PartialD;{\mathrm{<figure-callout\; id="1"\; label="N"\; filenames="131112142248.png,131112144540.png"\; state="\{\{state\}\}">N</figure-callout>}}_1}{\&PartialD;t}=-(W_{14}+W_{12}){\mathrm{<figure-callout\; id="1"\; label="N"\; filenames="131112142248.png,131112144540.png"\; state="\{\{state\}\}">N</figure-callout>}}_1+(A_{21}+W_{21}){\mathrm{<figure-callout\; id="2"\; label="N"\; filenames="131112142248.png"\; state="\{\{state\}\}">N</figure-callout>}}_2\\ \frac{\&PartialD;{\mathrm{<figure-callout\; id="2"\; label="N"\; filenames="131112142248.png"\; state="\{\{state\}\}">N</figure-callout>}}_2}{\&PartialD;t}=W_{12}{\mathrm{<figure-callout\; id="1"\; label="N"\; filenames="131112142248.png,131112144540.png"\; state="\{\{state\}\}">N</figure-callout>}}_1+A_{32}{N}_3-(W_{21}{\mathrm{<figure-callout\; id="2"\; label="N"\; filenames="131112142248.png"\; state="\{\{state\}\}">N</figure-callout>}}_2+A_{21}{N}_2){\mathrm{<figure-callout\; id="2"\; label="N"\; filenames="131112142248.png"\; state="\{\{state\}\}">N</figure-callout>}}_2\\ \frac{\&PartialD;{\mathrm{<figure-callout\; id="3"\; label="N"\; filenames="131112142248.png,131112142341.png"\; state="\{\{state\}\}">N</figure-callout>}}_3}{\&PartialD;t}=A_{43}{N}_4-A_{32}{\mathrm{<figure-callout\; id="3"\; label="N"\; filenames="131112142248.png,131112142341.png"\; state="\{\{state\}\}">N</figure-callout>}}_3\\ \frac{\&PartialD;N_4}{\&PartialD;t}=W_{14}{N}_1-A_{43}{N}_4\\ N_{\mathrm{er}}=N_1{N}_2+N_3{+N}_4\end{array}---\left(3\right)$

$\begin{array}{c}\frac{{\mathrm{dP}}_{\mathrm{ase}1}}{\mathrm{dz}}={\mathrm{\&Gamma;}}_{1340}(N_4{\mathrm{\&sigma;}}_{\mathrm{nd}\_e}-{\mathrm{<figure-callout\; id="2"\; label="N"\; filenames="131112142248.png"\; state="\{\{state\}\}">N</figure-callout>}}_2{\mathrm{\&sigma;}}_{\mathrm{nd}\_a})P_{\mathrm{ase}1}+2\mathrm{hv\&Delta;v}{N}_4{\mathrm{\&sigma;}}_{\mathrm{nd}\_e}-{\mathrm{\&alpha;}}_{1340}{P}_{\mathrm{ase}1}\\ \frac{{\mathrm{<figure-callout\; id="2"\; label="dP\; ase"\; filenames="131112142248.png"\; state="\{\{state\}\}">dP</figure-callout>}}_{\mathrm{ase}}}{\mathrm{dz}}={\mathrm{\&Gamma;}}_{1470}(N_4{\mathrm{\&sigma;}}_{\mathrm{tm}\_e}-{\mathrm{<figure-callout\; id="2"\; label="N"\; filenames="131112142248.png"\; state="\{\{state\}\}">N</figure-callout>}}_2{\mathrm{\&sigma;}}_{\mathrm{tm}\_a}){\mathrm{<figure-callout\; id="2"\; label="P\; ase"\; filenames="131112142248.png"\; state="\{\{state\}\}">P</figure-callout>}}_{\mathrm{ase}}+2\mathrm{hv\&Delta;v}{N}_4{\mathrm{\&sigma;}}_{\mathrm{tm}\_e}-{\mathrm{\&alpha;}}_{1470}{\mathrm{<figure-callout\; id="2"\; label="P\; ase"\; filenames="131112142248.png"\; state="\{\{state\}\}">P</figure-callout>}}_{\mathrm{ase}}\\ \frac{{\mathrm{<figure-callout\; id="3"\; label="dP\; ase"\; filenames="131112142248.png,131112142341.png"\; state="\{\{state\}\}">dP</figure-callout>}}_{\mathrm{ase}}}{\mathrm{dz}}={\mathrm{\&Gamma;}}_{1530}({\mathrm{<figure-callout\; id="2"\; label="N"\; filenames="131112142248.png"\; state="\{\{state\}\}">N</figure-callout>}}_2{\mathrm{\&sigma;}}_{\mathrm{ers}\_e}-{\mathrm{<figure-callout\; id="1"\; label="N"\; filenames="131112142248.png,131112144540.png"\; state="\{\{state\}\}">N</figure-callout>}}_1{\mathrm{\&sigma;}}_{\mathrm{er}\_a}){\mathrm{<figure-callout\; id="2"\; label="P\; ase"\; filenames="131112142248.png"\; state="\{\{state\}\}">P</figure-callout>}}_{\mathrm{ase}}+2\mathrm{hv\&Delta;v}{\mathrm{<figure-callout\; id="2"\; label="N"\; filenames="131112142248.png"\; state="\{\{state\}\}">N</figure-callout>}}_2{\mathrm{\&sigma;}}_{\mathrm{er}\_e}-{\mathrm{\&alpha;}}_{1530}{\mathrm{<figure-callout\; id="2"\; label="P\; ase"\; filenames="131112142248.png"\; state="\{\{state\}\}">P</figure-callout>}}_{\mathrm{ase}}\\ \frac{{\mathrm{dP}}_P}{\mathrm{dz}}={\mathrm{\&Gamma;}}_P({\mathrm{<figure-callout\; id="1"\; label="N"\; filenames="131112142248.png,131112144540.png"\; state="\{\{state\}\}">N</figure-callout>}}_{1\mathrm{nd}}{\mathrm{\&sigma;}}_{\mathrm{nd}14}+{\mathrm{<figure-callout\; id="1"\; label="N"\; filenames="131112142248.png,131112144540.png"\; state="\{\{state\}\}">N</figure-callout>}}_{1\mathrm{tm}}{\mathrm{\&sigma;}}_{\mathrm{tm}14}+{\mathrm{<figure-callout\; id="1"\; label="N"\; filenames="131112142248.png,131112144540.png"\; state="\{\{state\}\}">N</figure-callout>}}_{1\mathrm{er}}{\mathrm{\&sigma;}}_{\mathrm{er}14})P_p-{\mathrm{\&alpha;}}_P{P}_{\mathrm{ase}2}\end{array}---\left(4\right)$

N wherein _i(i=1～4) are the number of ions of above-mentioned each energy level of rare earth ion, P _asei(i=1～3) are 1530nm, 1470nm, the power of 1310nm emission band fluorescence, Wij(i=1～4, j=1～4) be the transition speed between corresponding energy level, N _nd, N _tm, N _erfor neodymium ion, the doping content of thulium ion and erbium ion.

By separating above-mentioned Rate equations and power equation group obtains: work as erbium ion, the length of the first doped fiber 1, the second doped fiber 2 and the 3rd doped fiber 3 that thulium ion and neodymium ion adulterate is respectively 20m, the power of pump laser 4 is 1W, when the output of pump light splitter 5 is respectively 33.3%, the superfluorescence of the first doped fiber 1 end, the second doped fiber 2 ends, the 3rd doped fiber 3 ends and fiber coupler 6 outputs is composed respectively as shown in Fig. 2, Fig. 3, Fig. 4 and Fig. 5.

Embodiment 2:

As shown in Figure 6, the difference of the present embodiment and embodiment 1 is: pump light emitter comprises the first pump laser 7, the second pump laser 8 and the 3rd pump laser 9; The first pump laser 7, the second pump laser 8 and the 3rd pump laser 9 that power is 200mW are launched respectively pump light and are 15 meters to length, and doping content is 1 Χ 10 ²⁴individual/m ³the first doped fiber 1, the second doped fiber 2 and the 3rd doped fiber 3.The first pump laser 7 is that wavelength is the pump laser diode of 980nm; The second pump laser 8 is that wavelength is the pump laser diode of 793nm; The 3rd pump laser 9 is that wavelength is the pump laser diode of 800nm.The other technologies scheme of the present embodiment is all identical with embodiment 1, repeats no more in the present embodiment.

Beneficial effect of the present invention is:

(1) the present invention uses the parallel-connection structure of the first doped fiber, the second doped fiber and three kinds of optical fiber of the 3rd doped fiber, can realize the ultra bandwidth superfluorescence source of 1100nm-1600nm bandwidth;

(2) the present invention is simple in structure, and has avoided three kinds of ion co-doped optical fiber of erbium, thulium and neodymium (or dysprosium, praseodymium) may make the interactional defect of electron transition of three wave bands, and spectrum efficiency is high.

The present invention can be with many multi-form realizations, and should not be construed as the restriction of the embodiment being subject in this proposition.

Claims (10)

1. a ultra broadband light source, is characterized in that, comprises pump light emitter, the first doped fiber, the second doped fiber, the 3rd doped fiber and fiber coupler; Wherein, described the first doped fiber is the optical fiber of erbium ion of having adulterated, and described the second doped fiber is the optical fiber of thulium ion of having adulterated, and described the 3rd doped fiber is the optical fiber of a kind of ion in neodymium ion or dysprosium ion or praseodymium ion of having adulterated;

Described pump light emitter is used for launching pump light, and described pump light emitter is launched one end that three road pump lights enter respectively described the first doped fiber, described the second doped fiber and described the 3rd doped fiber; Described fiber coupler comprises input and output; The output of described fiber coupler is as the transmitting terminal of this ultra broadband light source; The other end of described the first doped fiber, described the second doped fiber and described the 3rd doped fiber is connected with the input of described fiber coupler respectively;

Described pump light emitter is launched respectively three road pump lights to described the first doped fiber, described the second doped fiber and described the 3rd doped fiber, after receiving described pump light, described the first doped fiber, described the second doped fiber and described the 3rd doped fiber produce respectively three road spontaneous emission lights, described three road spontaneous emission lights are amplified respectively under the continuation pumping of pump light, form three road fluorescence, described three road fluorescence are coupled by fiber coupler, at the output of fiber coupler, obtain ultra broadband fluorescence.

2. ultra broadband light source according to claim 1, it is characterized in that, described pump light emitter comprise pump laser with and the pump light splitter that is connected with described pump laser, described pump light splitter is divided into three tunnels by described pump laser transmitting pump light, inputs to respectively described the first doped fiber, described the second doped fiber and described the 3rd doped fiber.

3. ultra broadband light source according to claim 2, is characterized in that, described pump laser is that wavelength is the pump laser diode of 793nm or 800nm or 808nm or 980nm.

4. ultra broadband light source according to claim 1, is characterized in that, described pump light emitter comprises the first pump laser, the second pump laser and the 3rd pump laser; The first pump laser, the second pump laser and the 3rd pump laser are launched respectively pump light to described the first doped fiber, described the second doped fiber and described the 3rd doped fiber.

5. ultra broadband light source according to claim 4, is characterized in that, described the first pump laser is that wavelength is the pump laser diode of 793nm or 800nm or 808nm or 980nm.

6. ultra broadband light source according to claim 4, is characterized in that, described the second pump laser is that wavelength is the pump laser diode of 793nm or 800nm or 808nm or 980nm.

7. ultra broadband light source according to claim 4, is characterized in that, described the 3rd pump laser is that wavelength is the pump laser diode of 793nm or 800nm or 808nm or 980nm.

8. ultra broadband light source according to claim 1, is characterized in that, in described the first doped fiber, the doping content scope of erbium ion is 10 ²²-10 ²⁶individual/m ³, in described the second doped fiber, the doping content scope of thulium ion is 10 ²²-10 ²⁶individual/m ³, in described the 3rd doped fiber, the doping content scope of neodymium or dysprosium or praseodymium ion is 10 ²²-10 ²⁶individual/m ³.

9. ultra broadband light source according to claim 1, is characterized in that, the length of described the first doped fiber, the second doped fiber and the 3rd doped fiber is respectively 0.1-100m.

10. ultra broadband light source according to claim 1, is characterized in that, described light source transmitting terminal transmitting boundary is at the ultra broadband fluorescence of 1100nm-1600nm.

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