CN104391415B - All-optical flip-flop based on nonlinear phase shift fiber grating - Google Patents
All-optical flip-flop based on nonlinear phase shift fiber grating Download PDFInfo
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- CN104391415B CN104391415B CN201410642153.6A CN201410642153A CN104391415B CN 104391415 B CN104391415 B CN 104391415B CN 201410642153 A CN201410642153 A CN 201410642153A CN 104391415 B CN104391415 B CN 104391415B
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- port
- polarization controller
- fiber grating
- signal source
- phase shift
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/3515—All-optical modulation, gating, switching, e.g. control of a light beam by another light beam
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/365—Non-linear optics in an optical waveguide structure
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention discloses an all-optical flip-flop based on a nonlinear phase shift fiber grating. An offset signal source is connected with a first polarization controller through a first optical isolator, wherein the first polarization controller is connected with a first band-pass filter; c2 of the first band-pass filter runs through an upper coupler d1 in a double-coupler optical fiber annular resonant cavity and is connected with e1 of a wavelength division multiplexer; e2 of the wavelength division multiplexer is connected with f1 of the nonlinear phase shift fiber grating; triggering signals are output by f2 of the nonlinear phase shift fiber grating; a setting signal source is connected with h1 of a second polarization controller through a second optical isolator; the second polarization controller is connected with e3 of the wavelength division multiplexer through a second band-pass filter; a resetting signal source is connected with k1 of a third polarization controller through a third optical isolator; k2 of the third polarization controller is connected with l1 of a third band-pass filter; optical wave output by l2 of the third band-pass filter enters an annular resonant cavity through a lower coupler d2 of the double-coupler optical fiber annular resonant cavity.
Description
Technical field
The invention belongs to optical information technology field is and in particular to a kind of triggered based on the full light of nonlinear phase shift fiber grating
Device.
Background technology
Fiber grating have small volume, splice loss, splice attenuation little entirely compatible with optical fiber, anti-electromagnetic interference capability is strong, chemically stable
The advantages of with electric insulation, this makes it be widely used in the field such as fiber optic communication and optical information processing.Lead in optical fiber
In letter, fiber grating can be used for optical fiber laser, fiber amplifier, grating filter, dispersion compensator, wavelength division multiplexer,
Can also be used for all-optical wave-length route and light exchange etc..Light resonance in Nonlinear Fiber Grating has bistable behavior, that is, a kind of defeated
Enter corresponding two kinds of output states.Using this characteristic, add positive feedback or negative-feedback, enable the signal output of device two
Switch between person's state, you can with for constructing the trigger based on bistable behavior.This trigger switch speed is fast, adapts to
High-speed transfer.
Content of the invention
The invention provides a kind of full light trigger based on nonlinear phase shift fiber grating.Nonlinear phase shift light of the present invention
The full light trigger of fine grating has the advantages that the little, anti-electromagnetic interference capability entirely compatible with optical fiber of small volume, splice loss, splice attenuation is strong,
It is particularly suitable for the application in optical communication system technology.
The present invention takes technical scheme below：Based on the full light trigger of nonlinear phase shift fiber grating, it is characterized in that wrapping
Include offset signal source (1-1), the first optoisolator (1-2), setting signal source (2-1), the second optoisolator (2-2), reset letter
Number source (3-1), the 3rd optoisolator (3-2), the first Polarization Controller (1-3), the second Polarization Controller (2-3), the 3rd polarization
Controller (3-3), the first bandpass filter (1-4), the second bandpass filter (2-4), the 3rd bandpass filter (3-4), wavelength-division
Multiplexer (1-5), there is double coupler fiber annular resonant cavities (3-5), nonlinear phase shift fiber grating (1-6), offset signal
Source (1-1) is connected with the first port (a1) of the first optoisolator (1-2), the second port (a2) of the first optoisolator (1-2)
It is connected with a port (b1) of the first Polarization Controller (1-3), second port (b2) of the first Polarization Controller (1-3)
It is connected with a port (c1) of the first bandpass filter (1-4), the first bandpass filter (1-4) second port (c2) is through tool
There is top coupler (d1) the first input with wavelength division multiplexer (1-5) afterwards in double coupler fiber annular resonant cavities (3-5)
Port (e1) connects, first end of the output port (e2) of wavelength division multiplexer (1-5) and nonlinear phase shift fiber grating (1-6)
Mouth (f1) connects, and then exports trigger by second port (f2) of nonlinear phase shift fiber grating (1-6)；Setting signal source
(2-1) be connected with the first port (g1) of the second optoisolator (2-2), the second port (g2) of the second optoisolator (2-2) with
The a port (h1) of the second Polarization Controller (2-3) connects, second port (h2) of the second Polarization Controller (2-3) with
A port (i 1) connection, the second bandpass filter (2-4) second port (i2) and the ripple of the second bandpass filter (2-4)
Second input port (e3) of division multiplexer (1-5) connects；Reset signal source (3-1) and the first of the 3rd optoisolator (3-2)
Port (j1) connection, the second port (j2) of the 3rd optoisolator (3-2) and a port of the 3rd Polarization Controller (3-3)
(k1) connection, second port (k2) of the 3rd Polarization Controller (3-3) and a port of the 3rd bandpass filter (3-4)
(l1) connect, the light wave that the second port (l2) of the 3rd bandpass filter (3-4) exports is humorous through having double coupler fiber annulars
The lower section coupler (d2) shaking in chamber (3-5) enters ring resonator.
Preferably, maintain, set and signal wave wavelength produced by reset signal source are 1550nm.
Preferably, before and after phase-shifted fiber grating, phase-shift phase is pi/2.
Preferably, erbium-doped nonlinear fiber grating nonlinear refractive index 2.3 × 10-15m2/W.
Preferably, after amplification, the power of pump light is 9W.
Using light, resonance in Nonlinear Fiber Grating has bistable behavior to the present invention, and system is first in low transmission shape
State, corresponding digital signals " 0 ".A branch of maintenance is produced through optoisolator, Polarization Controller, bandpass filter by offset signal source
Light, is then passed through setting signal source through optoisolator, Polarization Controller, bandpass filter, is being maintained using wavelength division multiplexer
Add the light of a branch of positive feedback on the basis of light intensity, so that transmissive state is mutated, be in highly transmissive state, pulse is set
After disappearance, due to bistable state memory characteristic, system still maintains highly transmissive state, and corresponding digital signals " 1 " are it is achieved that by " 0 "
Upset to " 1 ".Another circuit is formed through optoisolator, Polarization Controller, bandpass filter using reset signal source
Light wave there are resonance having double coupler fiber annular resonant cavities, thus reducing light wave power output, be equivalent in dimension
Add a branch of degenerative light on the basis of holding light, so that transmissive state is mutated, be in low transmission state, resetting pulse
After disappearance, due to bistable state memory characteristic, system still maintains low transmission state, and corresponding digital signals " 0 " are it is achieved that by " 1 "
Upset to " 0 ".
The full light trigger of nonlinear phase shift fiber grating of the present invention has small volume, splice loss, splice attenuation is little and optical fiber is entirely simultaneous
The advantages of appearance, anti-electromagnetic interference capability are strong, is particularly suitable for the application in optical communication system technology.
Brief description
Fig. 1 is the full light trigger structural representation based on nonlinear phase shift fiber grating for the present invention.
Fig. 2 (a) is setting signal source, the positive and negative feedback of reset signal source input, and set represents setting signal, and reset represents
Reset signal.
Fig. 2 (b) is the trigger of full light trigger output.
Specific embodiment
Below in conjunction with the accompanying drawings the preferred embodiment of the present invention is elaborated.
As shown in figure 1, the present embodiment includes offset signal source 1- based on the full light trigger of nonlinear phase shift fiber grating
1st, the first optoisolator 1-2, setting signal source 2-1, the second optoisolator 2-2, the 3rd optoisolator 3-2, the first Polarization Control
Device 1-3, the second Polarization Controller 2-3, the 3rd Polarization Controller 3-3, the first bandpass filter 1-4, the second bandpass filter 2-
4th, the 3rd bandpass filter 3-4, wavelength division multiplexer 1-5, there is double coupler fiber annular resonant cavity 3-5, nonlinear phase shift light
Fine grating 1-6, reset signal source 3-1, offset signal source 1-1 is connected with first port a1 of the first optoisolator 1-2, the first light
Second port a2 of isolator 1-2 is connected with a port b1 of the first Polarization Controller 1-3, the first Polarization Controller 1-3
Second port b2 be connected with a port c1 of the first bandpass filter 1-4, second end of the first bandpass filter 1-4
C2 is defeated with the first of wavelength division multiplexer 1-5 after the top coupler d1 in double coupler fiber annular resonant cavity 3-5 through having for mouth
Inbound port e1 connects, and a port f1 of wavelength division multiplexer 1-5 output port e2 and nonlinear phase shift fiber grating 1-6 is even
Connect, then by second port f2 output trigger of nonlinear phase shift fiber grating 1-6.
Setting signal source 2-1 is connected with first port g1 of the second optoisolator 2-2, and the second of the second optoisolator 2-2
Port g2 is connected with a port h1 of the second Polarization Controller 2-3, second port h2 of the second Polarization Controller 2-3 with
The connection of a port i1, the second bandpass filter (2-4) second port i2 and the wavelength division multiplexer of the second bandpass filter 2-4
1-5 the second input port e3 connects.
Reset signal source 3-1 is connected with first port j1 of the 3rd optoisolator 3-2, and the second of the 3rd optoisolator 3-2
Port j2 is connected with a port k1 of the 3rd Polarization Controller 3-3, second port k2 of the 3rd Polarization Controller 3-3 with
A port l1 of the 3rd bandpass filter 3-4 connects, and the light wave of the 3rd bandpass filter 3-4 second port l2 output is through tool
The lower section coupler d2 in double coupler fiber annular resonant cavity 3-5 is had to enter ring resonator.
In the present embodiment, the cross-coupling coefficient of 2 couplers of the full light trigger of resonator is 0.3.Setting, weight
Confidence number be width be 3ps, the cycle be 32ps gaussian signal.The medium of Nonlinear Fiber Grating is no pumping er-doped light
Fibre, the phase difference of phase-shifted fiber grating takes pi/2, grating coefficient of coup 300cm-1, grating length L=2.5cm, grating mean refraction
Rate 1.46, non-linear Kerr coefficient 9 × 10-15cm-2/W.
Fig. 2 is under setting and reset signal effect, the code stream of trigger output.Explanation can be by adjusting triggering letter
Number come to realize need code stream, realize encoding function.
The full light trigger course of work based on nonlinear phase shift fiber grating for the present invention：
1st, using light, in Nonlinear Fiber Grating, resonance has bistable behavior, by offset signal source through optoisolator,
Polarization Controller, bandpass filter produce a branch of maintenance light.
2nd, the mutability according to optical bistability, system is first in low transmission state, corresponding digital signals " 0 ".By inclined
Put signal source and produce a branch of maintenance light through optoisolator, Polarization Controller, bandpass filter, then pass through setting signal source warp
Cross optoisolator, Polarization Controller, bandpass filter, added using wavelength division multiplexer a branch of positive and negative on the basis of maintaining light intensity
The light of feedback, so that transmissive state is mutated, is in highly transmissive state, after setting pulse disappears, because bistable state remembers spy
Property, system still maintains highly transmissive state, and corresponding digital signals " 1 " are it is achieved that upset by " 0 " to " 1 ".
3rd, reset signal source is utilized to be formed through optoisolator, Polarization Controller, bandpass filter on another circuit
Light wave has double coupler fiber annular resonant cavities generation resonance, thus reducing light wave power output, being equivalent to and maintaining
Add a branch of degenerative light on the basis of light, so that transmissive state is mutated, be in low transmission state, resetting pulse disappears
After mistake, due to bistable state memory characteristic, system still maintains low transmission state, corresponding digital signals " 0 " it is achieved that by " 1 " to
The upset of " 0 ".
The present invention constructs the trigger based on bistable behavior, and optical bistability characteristics are by phase-shifted fiber grating phase difference
Presence is achieved.
Above the preferred embodiments of the present invention and principle are described in detail, to those of ordinary skill in the art
Speech, the thought providing according to the present invention, specific embodiment will change, and these changes also should be regarded as the present invention
Protection domain.
Claims (4)
1. the full light trigger based on nonlinear phase shift fiber grating, it is characterized in that including offset signal source (1-1), the first light every
From device (1-2), setting signal source (2-1), the second optoisolator (2-2), reset signal source (3-1), the 3rd optoisolator (3-
2), the first Polarization Controller (1-3), the second Polarization Controller (2-3), the 3rd Polarization Controller (3-3), the first bandpass filter
(1-4), the second bandpass filter (2-4), the 3rd bandpass filter (3-4), wavelength division multiplexer (1-5), there are double coupler light
Fine ring resonator (3-5), nonlinear phase shift fiber grating (1-6), offset signal source (1-1) and the first optoisolator (1-2)
First port (a1) connect, the second port (a2) of the first optoisolator (1-2) and the first of the first Polarization Controller (1-3)
Individual port (b1) connects, second port (b2) of the first Polarization Controller (1-3) and the first of the first bandpass filter (1-4)
Individual port (c1) connects, and the first bandpass filter (1-4) second port (c2) is through having double coupler fiber annular resonant cavity (3-
5) the top coupler (d1) in is connected with the first input port (e1) of wavelength division multiplexer (1-5) afterwards, wavelength division multiplexer (1-5)
Output port (e2) be connected with a port (f1) of nonlinear phase shift fiber grating (1-6), then by nonlinear phase shift
Second port (f2) of fiber grating (1-6) exports trigger；
Setting signal source (2-1) is connected with the first port (g1) of the second optoisolator (2-2), the second optoisolator (2-2)
Second port (g2) is connected with a port (h1) of the second Polarization Controller (2-3), and the of the second Polarization Controller (2-3)
Two ports (h2) are connected with a port (i1) of the second bandpass filter (2-4), the second bandpass filter (2-4) second
Port (i2) is connected with second input port (e3) of wavelength division multiplexer (1-5)；
Reset signal source (3-1) is connected with the first port (j1) of the 3rd optoisolator (3-2), the 3rd optoisolator (3-2)
Second port (j2) is connected with a port (k1) of the 3rd Polarization Controller (3-3), and the of the 3rd Polarization Controller (3-3)
Two ports (k2) are connected with a port (l1) of the 3rd bandpass filter (3-4), and the of the 3rd bandpass filter (3-4)
The lower section coupler (d2) through having in double coupler fiber annular resonant cavities (3-5) for the light wave that Two-port netwerk (l2) exports enters ring
Shape resonator.
2. the full light trigger based on nonlinear phase shift fiber grating as claimed in claim 1 it is characterised in that：Offset signal
Source, setting signal source, signal wave wavelength produced by reset signal source are 1550nm.
3. the full light trigger based on nonlinear phase shift fiber grating as claimed in claim 1 it is characterised in that：Described phase shift
Before and after fiber grating, phase-shift phase is pi/2.
4. the full light trigger based on nonlinear phase shift fiber grating as described in any one of claim 1-3, its feature exists
In：The nonlinear refractive index 2.3 × 10 of described fiber grating-15m2/W.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410642153.6A CN104391415B (en) | 2014-11-13 | 2014-11-13 | All-optical flip-flop based on nonlinear phase shift fiber grating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410642153.6A CN104391415B (en) | 2014-11-13 | 2014-11-13 | All-optical flip-flop based on nonlinear phase shift fiber grating |
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| Publication Number | Publication Date |
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| CN104391415A CN104391415A (en) | 2015-03-04 |
| CN104391415B true CN104391415B (en) | 2017-02-08 |
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| CN201410642153.6A Expired - Fee Related CN104391415B (en) | 2014-11-13 | 2014-11-13 | All-optical flip-flop based on nonlinear phase shift fiber grating |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105629624A (en) * | 2016-01-19 | 2016-06-01 | 杭州电子科技大学 | All-optical logic gate based on FBG (Fiber Brag Grating) CPM (Cross Phase Modulation) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5724371A (en) * | 1995-02-21 | 1998-03-03 | Commissariat A L'energie Atomique | Photoinscribed bragg grating sensor with a good signal-to-noise ratio |
| CN1898731A (en) * | 2003-12-23 | 2007-01-17 | 皇家飞利浦电子股份有限公司 | Optical flip-flop based read-out arrangement |
| UA24198U (en) * | 2007-01-15 | 2007-06-25 | Univ Kherson Nat Technical | Integrated optical d trigger |
| CN103545703A (en) * | 2013-10-23 | 2014-01-29 | 华南理工大学 | Light-operated triggering laser device |
| CN103744251A (en) * | 2013-12-19 | 2014-04-23 | 杭州电子科技大学 | All-optical trigger based on nonlinear micro-ring resonant cavity |
| 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 |
-
2014
- 2014-11-13 CN CN201410642153.6A patent/CN104391415B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5724371A (en) * | 1995-02-21 | 1998-03-03 | Commissariat A L'energie Atomique | Photoinscribed bragg grating sensor with a good signal-to-noise ratio |
| CN1898731A (en) * | 2003-12-23 | 2007-01-17 | 皇家飞利浦电子股份有限公司 | Optical flip-flop based read-out arrangement |
| UA24198U (en) * | 2007-01-15 | 2007-06-25 | Univ Kherson Nat Technical | Integrated optical d trigger |
| CN103545703A (en) * | 2013-10-23 | 2014-01-29 | 华南理工大学 | Light-operated triggering laser device |
| CN103744251A (en) * | 2013-12-19 | 2014-04-23 | 杭州电子科技大学 | All-optical trigger based on nonlinear micro-ring resonant cavity |
| 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 |
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