CN203773204U - Self-pulse generator based on erbium-doped fiber grating - Google Patents
Self-pulse generator based on erbium-doped fiber grating Download PDFInfo
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- CN203773204U CN203773204U CN201420111264.XU CN201420111264U CN203773204U CN 203773204 U CN203773204 U CN 203773204U CN 201420111264 U CN201420111264 U CN 201420111264U CN 203773204 U CN203773204 U CN 203773204U
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- erbium
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- doped fiber
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Abstract
The utility model discloses a self-pulse generator based on an erbium-doped fiber grating, comprising a pumping source, an optical isolator, a polarization controller, an erbium-doped fiber amplifier, a band-pass filter, a circulator and an erbium-doped fiber grating, wherein the pumping source is connected with the first port of the isolator, the second port of the isolator is connected with the first port of the polarization controller, the second port of the polarization controller is connected with the first port of the erbium-doped fiber amplifier, the second port of the erbium-doped fiber amplifier is connected with the first port of the band-pass filter, the second port of the band-pass filter is connected with the first port of the circulator, the second port of the circulator is connected with the first port of the erbium-doped fiber grating, the third port of the circulator is the output end of fiber grating reflected signals, and the second port of the erbium-doped fiber grating is the output end of transmission signals. Since the erbium-doped fiber grating has the characteristics of high nonlinearity and self-oscillation, the system output pulse signals.
Description
Technical field
The utility model belongs to optical information technical field, be specifically related to a kind of based on erbium-doped nonlinear fiber grating from pulse generator.
Background technology
In modern communication networks, the mode of employing all optical communication raises speed, upgrades network is trend of the times.Fiber grating integrates filtering, reflection characteristic, the cyclophysis of fiber grating, is predicted to be a large pith of all optical communication in the future.Be successfully applied at present in dense wavelength division multiplexing system, Erbium-Doped Fiber Amplifier (EDFA) (EDFA) system, all optical communication and optical fiber sensing system.The essence of fiber grating is to utilize the photosensitivity of fiber optic materials, the optical fiber that is radiated at a section of forming in fibre core and forever has periodic refractive index modulation by ultraviolet ray, its effect essence is in fibre core, to form a wave filter, while meeting certain condition, incident light is reflected completely, otherwise can be transmitted.In the time that light intensity reaches certain value, produce nonlinear effect.Due to self-sustained oscillation, can produce short pulse at fiber grating output terminal.The pulse producing from pulse generator based on doped fiber grating, according to lambda1-wavelength, can regulate and control the repetition rate of pulse.
Summary of the invention
There is larger nonlinear factor for erbium-doped nonlinear fiber grating, the utility model provide a kind of based on erbium-doped nonlinear fiber grating from pulse generator.The utility model is taked following technical scheme:
The utility model comprises pumping source, isolator, Polarization Controller, Erbium-Doped Fiber Amplifier (EDFA), bandpass filter, circulator and erbium-doped nonlinear fiber grating.Pu wave source is connected with the first port of isolator, the second port of isolator is connected with first port of Polarization Controller, second port of Polarization Controller is connected with Erbium-Doped Fiber Amplifier (EDFA) the first port, Erbium-Doped Fiber Amplifier (EDFA) the second port is connected with bandpass filter the first port, bandpass filter the second port is connected with circulator the first port, circulator the second port is connected with the first port of erbium-doped nonlinear fiber grating, circulator the 3rd port is fiber Bragg grating reflected signal output terminal, and the second port of erbium-doped nonlinear fiber grating is transmission signal output terminal.Due to erbium-doped nonlinear fiber grating high non-linearity and self-sustained oscillation characteristic, system output pulse signal.
Based on high non-linearity erbium-doped nonlinear fiber grating high non-linearity, input optical signal frequency drops on the edge in forbidden band, due to the non-linear movement that causes photon band gap, dispersion and the nonlinear balance of now grating induction, cause the generation of soliton-like from pulse. be edge, forbidden band equally, if input lower-wattage continuous wave, can not produce from pulse phenomenon.
The utility model adopts Polarization Controller, can eliminate preferably the impact of polarization effect; By regulating the emission wavelength of light source, and bandpass filter is carried out preferably, can obtaining the high-speed pulse of different repetition rates.
First the utility model adopts erbium-doped nonlinear fiber grating, by the pumping wave being exaggerated is coupled in highly nonlinear optical fiber grating, meets phase matching generation self-sustained oscillation, produces high-speed pulse.
The utility model erbium-doped nonlinear fiber grating from pulse generator be easy to integrated with fibre system, pulse recurrence rate is high, it is particularly suitable for the application of optical communication system.
Brief description of the drawings
Fig. 1 is that the utility model erbium-doped nonlinear fiber grating is from pulse generator structural representation.
Fig. 2 is input signal amplitude
a(
t)=3W
1/2, off resonance amount
d=5.6cm
-1. time pulse amplitude variation diagram.
Fig. 3 is input signal amplitude
a(
t)=3W
1/2, off resonance amount
d=6.2cm
-1. time pulse amplitude variation diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, comprise pumping source 1, isolator 2, Polarization Controller 3, Erbium-Doped Fiber Amplifier (EDFA) 4, bandpass filter 5, circulator 6 and erbium-doped nonlinear fiber grating 7 based on erbium-doped nonlinear fiber grating from pulse generator.Pumping source 1 wavelength coverage is 1540nm-1565nm, and erbium-doped nonlinear fiber grating length is 1cm, erbium-doped nonlinear fiber grating nonlinear refractive index 2.3 × 10
-15m
2/ W, the power of amplified signal light is 9W.
Pu wave source 1 is connected with the first port b of isolator 2, the second port c of isolator 2 is connected with first port d of Polarization Controller 3, second port e of Polarization Controller 3 is connected with Erbium-Doped Fiber Amplifier (EDFA) 4 first port f, Erbium-Doped Fiber Amplifier (EDFA) 4 second port g are connected with bandpass filter 5 first port g1, bandpass filter 5 second port g3 are connected with circulator 6 first port h, circulator 6 second port i are connected with the first port j of erbium-doped nonlinear fiber grating 7, circulator 6 the 3rd port l is fiber Bragg grating reflected signal output terminal, the second port k of erbium-doped nonlinear fiber grating 7 is transmission signal output terminal.Due to erbium-doped nonlinear fiber grating high non-linearity and self-sustained oscillation characteristic, system output pulse signal.
Adjustable pumping source output power and output wavelength, the amplifying power of control Erbium-Doped Fiber Amplifier (EDFA).Repetition rate and the pumping source output power, the output wavelength that produce pulse are relevant with erbium-doped nonlinear fiber grating nonlinear factor; Adjust pumping source output power, output wavelength, repetition rate and the peak power of output pulse can change, and obtain according to actual needs the pulse train that can obtain wanting.In order to reduce as much as possible loss, the tie point of each device is directly welded together.
The utility model based on erbium-doped nonlinear fiber grating from pulse production process:
1, according to generation from pulse recurrence rate, peak power feature, select appropriate power pumping wave, to meet the condition producing from pulse.
2,, according to the condition that produces pulse, select the fiber grating of suitable nonlinear parameter.
3,, according to the desired value of needed pulse recurrence rate, decide the length of er-doped Nonlinear Fiber Grating.
4, according to generation from pulse recurrence rate, peak power feature, select the pumping wave of suitable wavelength.
Off resonance amount in Fig. 2
d=5.6cm
-1, the signal of input higher-wattage
a f (0,
t)=3W
1/2, photon frequency drops on photon band gap edge, and system, in higher transmissive state, has produced higher repetition rate pulse, and output signal has showed a kind of self-pulsing phenomenon.
Off resonance amount in Fig. 3
d=6.2cm
-1, the signal of input higher-wattage
a f (0,
t)=3W
1/2, photon frequency drops on photon band gap edge equally, and system, in higher transmissive state, has produced the repetition rate pulse higher than Fig. 2, has showed a kind of self-pulsing phenomenon.
The utility model can obtain the output of high-repetition-rate pulse signal.Repetition rate is inputted pumping wave power, wavelength, highly nonlinear optical fiber length, nonlinear factor control.
Above preferred embodiment of the present utility model and principle are had been described in detail; for those of ordinary skill in the art; the thought providing according to the utility model will change in embodiment, and these changes also should be considered as protection domain of the present utility model.
Claims (1)
- Based on erbium-doped nonlinear fiber grating from a pulse generator, it is characterized in that: comprise pumping source (1), isolator (2), Polarization Controller (3), Erbium-Doped Fiber Amplifier (EDFA) (4), bandpass filter (5), circulator (6) and erbium-doped nonlinear fiber grating (7);Pu wave source (1) is connected with first port (b) of isolator (2), second port (c) of isolator (2) is connected with first port (d) of Polarization Controller (3), second port (e) of Polarization Controller (3) is connected with Erbium-Doped Fiber Amplifier (EDFA) (4) first ports (f), Erbium-Doped Fiber Amplifier (EDFA) (4) second ports (g) are connected with bandpass filter (5) first ports (g1), bandpass filter (5) second ports (g2) are connected with circulator (6) first ports (h), circulator (6) second ports (i) are connected with first port (j) of erbium-doped nonlinear fiber grating (7), circulator (6) the 3rd port (l) is fiber Bragg grating reflected signal output terminal, second port (k) of erbium-doped nonlinear fiber grating (7) is transmission signal output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420111264.XU CN203773204U (en) | 2014-03-12 | 2014-03-12 | Self-pulse generator based on erbium-doped fiber grating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420111264.XU CN203773204U (en) | 2014-03-12 | 2014-03-12 | Self-pulse generator based on erbium-doped fiber grating |
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|---|---|
| CN203773204U true CN203773204U (en) | 2014-08-13 |
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ID=51290375
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| CN201420111264.XU Expired - Fee Related CN203773204U (en) | 2014-03-12 | 2014-03-12 | Self-pulse generator based on erbium-doped fiber grating |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103869576A (en) * | 2014-03-12 | 2014-06-18 | 杭州电子科技大学 | Self-pulsing generator based on erbium-doped fiber Bragg grating |
| CN105261920A (en) * | 2015-09-25 | 2016-01-20 | 厦门彼格科技有限公司 | Low repetition frequency short pulse optical fiber amplifier based on special phase-shifting fiber Bragg grating control loop |
-
2014
- 2014-03-12 CN CN201420111264.XU patent/CN203773204U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103869576A (en) * | 2014-03-12 | 2014-06-18 | 杭州电子科技大学 | Self-pulsing generator based on erbium-doped fiber Bragg grating |
| CN103869576B (en) * | 2014-03-12 | 2016-08-24 | 杭州电子科技大学 | Based on erbium-doped nonlinear fiber grating from pulse generator |
| CN105261920A (en) * | 2015-09-25 | 2016-01-20 | 厦门彼格科技有限公司 | Low repetition frequency short pulse optical fiber amplifier based on special phase-shifting fiber Bragg grating control loop |
| CN105261920B (en) * | 2015-09-25 | 2018-08-31 | 厦门彼格科技有限公司 | A kind of low repetition short light pulse fiber amplifier based on special phase shift optical fiber Bragg grating control rings |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20170312 |