CN106199828B - Ultrafast microwave leads the full light trigger of Sagnac ring - Google Patents
Ultrafast microwave leads the full light trigger of Sagnac ring Download PDFInfo
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- CN106199828B CN106199828B CN201610597305.4A CN201610597305A CN106199828B CN 106199828 B CN106199828 B CN 106199828B CN 201610597305 A CN201610597305 A CN 201610597305A CN 106199828 B CN106199828 B CN 106199828B
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- light pulse
- polarization beam
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/12004—Combinations of two or more optical elements
Abstract
The present invention provides a kind of ultrafast microwaves to lead the full light trigger of Sagnac ring, including waveguide Sagnac ring, hollow-core photonic crystal fiber is respectively equipped on the waveguide Sagnac ring, doped optical fibre amplifier, polarization beam combiner, coupler and optical circulator, wherein, it is respectively the first optical circulator and the second optical circulator that the optical circulator, which has two, it is respectively the first coupler and the second coupler that the coupler, which has two, first optical circulator is connect with first coupler, second optical circulator is connect with second coupler, first coupler, second coupler is connect with the both ends of the hollow-core photonic crystal fiber respectively, it is respectively the first polarization beam combiner and the second polarization beam combiner that the polarization beam combiner, which has two,.The beneficial effects of the present invention are: it is small in size, it is easily integrated, transmission rate is high, and the bit error rate is small.
Description
Technical field
The present invention relates to light triggers more particularly to a kind of ultrafast microwave to lead the full light trigger of Sagnac ring.
Background technique
Light trigger is the optical logic device with memory function, is one of the basic technology of digital optical signal processing,
It is one of the key technology of all-optical packet switching net, as most basic all-optical signal processors part, full light trigger is in data
It is all applied in Packet Switching Node, full light shift register and all-optical bit grade data buffer.
Huawei delivers " extremely simple network " results new technology in ECOC 2015, causes people in the industry's extensive concern.Technology benefit
Metropolitan area 100G transmission is realized with lower cost, and breakthrough the 80km transmission for realizing unicast 112Gb/s rate.Therefore,
The core devices light memory storage devices of future optical networks high speed exchange are to realize the base of Ultrahigh capacity Optical Fiber Communication Systems application
Essentiality.
So far, numerous domestic and foreign scholars study to full light trigger and have achieved some achievements.Nineteen ninety-five,
H.Kawaguchi et al. proposes that this trigger is to ring using Vcsel (VCSEL) Lai Shixian trigger
Border is more sensitive, and the maintenance properties of trigger are not easy to control, can cascade it is poor；Hispanic F.Ramos et al. uses single
MZI-SOA realizes Mach-Zehnder interferometer (MZI-SOA) structure assisted with SOA, and the structure of this trigger is simple, the response time
It is less than, but output state alternative in light intensity is bad, is not easy to integrated cascade；To South Korea Yong Deok Jeong in 2006
Equal scholars, which propose using Fabry-Perot (FP-LD) laser of two couplings, realizes light Trigger Function, light in the program
Fine grating it is small in size, be easily integrated, the state of trigger keeps being easy, and cascade is good, but flip-flop states are easy by temperature
It influences；Based on the light trigger of Terahertz asymmetrical optical demultiplexer (TOAD), using active device semiconductor optical amplifier
Realize the gain of light pulse, due to the inconsistency of wavelength, so that the cascade of trigger is poor, noise figure is relatively high, band
Wide utilization rate is bad etc.；Multi-mode interference-type bistable laser diode (MMI-BLDs), the response time is fast, but is not easy to trigger, mutually
Reprimand property is bad；The full light trigger of 2 D photon crystal (2-D PhC), it is small in size, it is easily integrated, it can be difficult to accurate control is incident
The phase difference of signal beams needs higher input power, and energy consumption is high.
Although trigger is many kinds of, the place that all comes with some shortcomings causes utility value not high, and in optic communication
In, all-optical signal processing is related to various operations such as multiplexing, exchange, regeneration, synchronization, storage, calculating of signal, Yao Guang
It is really applied in network, all-optical signal processors part must have following several features:
(a) high speed signal can be handled, and structure is simple.
(b) small power consumption should be as small as possible the energy consumption in electrical part.
(c) convenient for integrated.
(d) above advantages can be played in application field.
We have seen that all-optical signal processing technology has been achieved for significant progress, nevertheless, these devices are with above-mentioned
4 points of requirements have a certain gap, in optical communication field, all-optical signal processing technology will replace Electric signal processing device completely,
It to be walked there are also very long stretch.
Summary of the invention
In order to solve the problems in the prior art, the present invention provides a kind of ultrafast microwaves to lead the full light triggering of Sagnac ring
Device.
The present invention provides a kind of ultrafast microwaves to lead the full light trigger of Sagnac ring, including waveguide Sagnac ring, the wave
It leads and is respectively equipped with hollow-core photonic crystal fiber, doped optical fibre amplifier, polarization beam combiner, coupler and ring of light shape on Sagnac ring
Device, wherein it is respectively the first optical circulator and the second optical circulator that the optical circulator, which has two, and the coupler has two points
Not Wei the first coupler and the second coupler, first optical circulator connect with first coupler, second ring of light
Shape device is connect with second coupler, first coupler, the second coupler respectively with the hollow-core photonic crystal fiber
Both ends connection, the polarization beam combiner have two be respectively the first polarization beam combiner and the second polarization beam combiners, described first
Polarization beam combiner, the second polarization beam combiner are connect with the both ends of the hollow-core photonic crystal fiber respectively, the first beam light pulse,
Two beam light pulses are respectively input signal, and the first beam light pulse is divided into from input port IP1 input by the first coupler suitable
Hour hands light pulse, the second beam light pulse are divided into light pulse counterclockwise by the second coupler from input port IP2 input, and first
Beam control signal light pulse passes through the first polarization beam combiner into one end of hollow-core photonic crystal fiber from control port CP1, the
Two beam control signal light pulses are from control port CP2 by the other end of the second polarization beam combiner to hollow-core photonic crystal fiber
In, after Cross-phase Modulation occurs for the first beam control signal light pulse and light pulse clockwise circuit into the first coupler, and
It is sent out from the first optical circulator by shaping pulse to output port OP1, the second beam control signal light pulse and light pulse counterclockwise
Shaping pulse is passed through to output port OP2 into the second coupler, and from the second optical circulator in circuit after raw Cross-phase Modulation.
As a further improvement of the present invention, the control pulse rear end of the first polarization beam combiner is connected with the rotation of the first polarization
Device, the first beam control signal light pulse obtain and cross-polarization identical as the first beam light pulse wavelength by the first polarization rotator
First control signal.
As a further improvement of the present invention, the control pulse rear end of the second polarization beam combiner is connected with the rotation of the second polarization
Device, the second beam control signal light pulse obtain and cross-polarization identical as the second beam light pulse wavelength by the second polarization rotator
Second control signal.
As a further improvement of the present invention, the input terminal of first polarization rotator is connected with the first doped fiber and puts
Big device, the input terminal of second polarization rotator are connected with the second doped optical fibre amplifier, the control port CP1 with it is described
The connection of first doped optical fibre amplifier, the control port CP2 are connect with second doped optical fibre amplifier.
As a further improvement of the present invention, the hollow-core photonic crystal fiber is fiber optic loop.
As a further improvement of the present invention, the both ends of the hollow-core photonic crystal fiber are connected separately with the first polarization point
Beam device and the second polarization beam apparatus.
As a further improvement of the present invention, the waveguide Sagnac ring is three-decker, 235 nanometer thickness including upper layer
Monocrystalline silicon, 3 microns thick of silica buffer layer of middle layer and 525 microns of thick silicon substrates of lower layer.
The beneficial effects of the present invention are: it is small in size, it is easily integrated, transmission rate is high, and the bit error rate is small, is suitble to large-scale integrated
Optical path.
Detailed description of the invention
Fig. 1 is the schematic diagram that a kind of ultrafast microwave of the present invention leads the full light trigger of Sagnac ring.
Fig. 2 is the stratiform signal for the waveguide Sagnac ring that a kind of ultrafast microwave of the present invention leads the full light trigger of Sagnac ring
Figure.
Fig. 3 is the modulate expression of waveguide Sagnac switch.
Fig. 4 is one schematic diagram of embodiment of d type flip flop.
Fig. 5 is two schematic diagram of embodiment of d type flip flop.
Fig. 6 is the schematic diagram of R-S trigger.
Fig. 7 is the schematic diagram of J-K flip flop.
Specific embodiment
The present invention is further described for explanation and specific embodiment with reference to the accompanying drawing.
As shown in Figure 1, a kind of ultrafast microwave leads the full light trigger of Sagnac ring, including waveguide Sagnac ring, the waveguide
Hollow-core photonic crystal fiber 3 (abbreviation HC-PCF), doped optical fibre amplifier, polarization beam combiner (letter are respectively equipped on Sagnac ring
Claim PBC), coupler (abbreviation 3dB C) and optical circulator (abbreviation OC), wherein the optical circulator has two respectively first
Optical circulator 11 and the second optical circulator 12, the coupler have two respectively the first coupler 21 and the second couplers 22,
First optical circulator 11 is connect with first coupler 21, second optical circulator 12 and second coupler 22
Connection, first coupler 21, the second coupler 22 are connect with the both ends of the hollow-core photonic crystal fiber 3 respectively, described
It is respectively the first polarization beam combiner 31 and the second polarization beam combiner 32, first polarization beam combiner that polarization beam combiner, which has two,
31, the second polarization beam combiner 32 is connect with the both ends of the hollow-core photonic crystal fiber 3 respectively.
As shown in Figure 1, the control pulse rear end of the first polarization beam combiner 41 is connected with the first polarization rotator 51 (referred to as
PR), the first beam control signal light pulse obtains identical and orthogonal as the first beam light pulse wavelength by the first polarization rotator 51
The first control signal of polarization.
As shown in Figure 1, the control pulse rear end of the second polarization beam combiner 42 is connected with the second polarization rotator 52 (referred to as
PR), the second beam control signal light pulse obtains identical and orthogonal as the second beam light pulse wavelength by the second polarization rotator 52
The second control signal of polarization.
As shown in Figure 1, the input terminal of first polarization rotator 51 is connected with the first doped optical fibre amplifier 71 (referred to as
EDFA), the input terminal of second polarization rotator 52 is connected with the second doped optical fibre amplifier 72 (abbreviation EDFA), the control
Port CP1 processed is connect with first doped optical fibre amplifier 71, and the control port CP2 and second doped fiber amplify
Device 72 connects.
As shown in Figure 1, the hollow-core photonic crystal fiber 3 is fiber optic loop.
As shown in Figure 1, the both ends of the hollow-core photonic crystal fiber 3 are connected separately with the first polarization beam apparatus 61 (referred to as
) and the second polarization beam apparatus 62 (abbreviation PBS) PBS.
As shown in Figure 1, the first beam light pulse, the second beam light pulse are respectively input signal, the first beam light pulse is from input
The input of Port IP 1 is divided into light pulse clockwise (CW) by the first coupler 21, and the second beam light pulse is defeated from input port IP2
Enter and be divided into light pulse counterclockwise (CCW) by the second coupler 22, the first beam control signal light pulse is first from control port CP1
Hollow photon crystal light is arrived by the first doped optical fibre amplifier 71, the first polarization rotator 51, the first polarization beam combiner 41 afterwards
In one end of fibre 3, the second beam control signal light pulse successively passes through the second doped optical fibre amplifier 72, the from control port CP2
Two polarization rotators 52, the second polarization beam combiner 42 to hollow-core photonic crystal fiber 3 the other end in, the first beam control signal light
Pulse and light pulse clockwise (CW) occur Cross-phase Modulation (XPM, Cross-phase Modulation) afterwards circuit to the
In one coupler 21, and from the first optical circulator 11 by shaping pulse to output port OP1, the second beam control signal light pulse
Circuit is into the second coupler 22 after Cross-phase Modulation occurs with light pulse counterclockwise (CCW), and from the second optical circulator 12
By shaping pulse to output port OP2.
As shown in Fig. 2, the waveguide Sagnac ring is three-decker, the monocrystalline silicon of 235 nanometer thickness including upper layer, centre
3 microns thick of silica buffer layer of layer and 525 microns of thick silicon substrates of lower layer.Coupler, polarization control are etched on it
Device and photonic crystal fiber processed etc., then the external access devices such as optical circulator and image intensifer.Use HC-PCF for ring, luminous energy
The heart, air bore dia d are 110nm, pitch of holes 200nm, air filling fraction d/=0.55 > 0.406, light in a fiber in quantity set
It is limited within central hollow core and transmits, some researches show that, this PCF can transmit 99% or more luminous energy, and space optical attenuation
Extremely low, optical fiber attenuation only has the 1/2~1/4 of standard fiber.
According to waveguide Sagnac on-off principle and characteristic, and have devised D type, R-S type, J-K type and toggle flip-flop, table 1
List corresponding property list, modulate expression such as Fig. 3 to Fig. 7.
The basic binary trigger property list of table 1
In Fig. 4, IP1=1, CP1=1, OP2=Qn+1=1, IP1=0, CP1=1, OP2=Qn+1=0, this is the touching of D type
Send out " holding " operation of device.In Fig. 5, IP1=IP2=0, CP1=CP2=1, Qn+1=0, this is the reset of R-S D-flip flop
Operation；IP1=1, IP2=0, CP1=1, CP2=0, Qn+1=1, this is operated for the set of R-S D-flip flop；CP1=1,
If Last status Qn=1, Qn+1=1, if Last status Qn=0, Qn+1=0, this is R-S D-flip flop " holding " behaviour
Make, S=1, R=1 be it is forbidden, all input conditions of R-S D-flip flop can be with characteristic equation Qn+1=S+`RQn (about
Beam condition SR=0) it indicates.In Fig. 6, J and K are separately input in the logical AND gate that two are made of polarization switch S1 and S2,
It is mutually output in S and R and inputs with operation with two-way delay line feedback, J-K D-flip flop solves to be forbidden in R-S D-flip flop
There is " the situation of S=1, R=1 "；In Fig. 7, work as T=0, i.e. J=K=0, know Qn+1=Qn from the characteristic of J-K D-flip flop,
This is toggle flip-flop " holding " function, works as T=1, i.e. J=K=1, Qn+1=this be toggle flip-flop " overturning " function.
A kind of ultrafast microwave provided by the invention leads the full light trigger of Sagnac ring, reduces using SOA bring noise
Greatly, the disadvantages of system mode is unstable, use the hollow-core photonic crystal fiber (HC-PCF) of high non-linearity make system have than with
Toward smaller input power, lower power consumption, transmission rate 100Gb/s.The full light trigger performance is stablized, small power consumption, transmission
Rate is up to 100Gb/s, input power 0.05mw, and the response time is small in size convenient for integrated in ps magnitude, in large-scale integrated
Cascading has great potential in optical path, for promoting all-optical signal processing technology and all-optical packet switching, All-optical routing, complete
The development in the fields such as optical oomputing has important meaning.
A kind of ultrafast microwave provided by the invention is led the full light trigger of Sagnac ring and is had the advantage that
1, using the novel waveguide Sagnac structure of silicon materials, D, R-S, J-K and the full light trigger of T-type are designed, it is small in size,
It is easily integrated, transmission rate 100Gb/s, the bit error rate is small, is suitble to large-scale integrated optical path.
2, reduce using the disadvantages of SOA bring noise is big, system mode is unstable.
3, keep system input power small using HC-PCF, low in energy consumption, system is stablized.
4, the full light trigger of waveguide Sagnac ring is small in size, and power is low (uw), and loss is small, and the response time is fast (ps), passes
Defeated rate is high (100Gb/s), and the bit error rate is small (10-9), has great potential in large-scale integrated cascade optical path.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (5)
1. a kind of ultrafast microwave leads the full light trigger of Sagnac ring, it is characterised in that: including waveguide Sagnac ring, the waveguide
Hollow-core photonic crystal fiber, polarization beam combiner, coupler and optical circulator are respectively equipped on Sagnac ring, wherein the ring of light
Shape device have two be respectively the first optical circulator and the second optical circulators, the coupler have two be respectively the first couplers and
Second coupler, first optical circulator are connect with first coupler, second optical circulator and second coupling
Clutch connection, first coupler, the second coupler are connect with the both ends of the hollow-core photonic crystal fiber respectively, described inclined
It is respectively the first polarization beam combiner and the second polarization beam combiner that vibration bundling device, which has two, and first polarization beam combiner, second are partially
Vibration bundling device is connect with the both ends of the hollow-core photonic crystal fiber respectively, and the first beam light pulse, the second beam light pulse are respectively
Input signal, the first beam light pulse are divided into light pulse clockwise by the first coupler from input port IP1 input, and second
Beam light pulse is divided into light pulse counterclockwise, the first beam control signal light arteries and veins by the second coupler from input port IP2 input
Punching passes through the first polarization beam combiner into one end of hollow-core photonic crystal fiber from control port CP1, the second beam control signal light
Pulse passes through the second polarization beam combiner into the other end of hollow-core photonic crystal fiber from control port CP2, the first beam control system letter
Circuit is passed through into the first coupler, and from the first optical circulator after Cross-phase Modulation occurs for number light pulse and light pulse clockwise
Extra pulse is shaped into output port OP1, after Cross-phase Modulation occurs for the second beam control signal light pulse and light pulse counterclockwise
Shaping pulse is passed through to output port OP2 into the second coupler, and from the second optical circulator in circuit；
The input terminal of first polarization beam combiner is connected with the first polarization rotator, and the first beam control signal light pulse is inclined by first
Vibration rotator obtains identical as the first beam light pulse wavelength and cross-polarization first control signal；
The input terminal of second polarization beam combiner is connected with the second polarization rotator, and the second beam control signal light pulse is inclined by second
Vibration rotator obtains identical as the second beam light pulse wavelength and cross-polarization second control signal；
First beam control signal light pulse from control port CP1 successively pass through the first polarization rotator, the first polarization beam combiner to
In one end of hollow-core photonic crystal fiber, the second beam control signal light pulse successively passes through the rotation of the second polarization from control port CP2
In the other end for turning device, the second polarization beam combiner to hollow-core photonic crystal fiber.
2. ultrafast microwave according to claim 1 leads the full light trigger of Sagnac ring, it is characterised in that: first polarization
The input terminal of rotator is connected with the first doped optical fibre amplifier, and the input terminal of second polarization rotator is connected with second and mixes
Veiling glare fiber amplifier, the control port CP1 are connect with first doped optical fibre amplifier, the control port CP2 and institute
State the connection of the second doped optical fibre amplifier.
3. ultrafast microwave according to claim 1 leads the full light trigger of Sagnac ring, it is characterised in that: the air-core photonic
Crystal optical fibre is fiber optic loop.
4. ultrafast microwave according to claim 1 leads the full light trigger of Sagnac ring, it is characterised in that: the air-core photonic
The both ends of crystal optical fibre are connected separately with the first polarization beam apparatus and the second polarization beam apparatus.
5. ultrafast microwave according to claim 1 leads the full light trigger of Sagnac ring, it is characterised in that: the waveguide
Sagnac ring is three-decker, and the monocrystalline silicon of 235 nanometer thickness including upper layer, 3 microns thick of silica of middle layer buffer
525 microns of thick silicon substrates of layer and lower layer.
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| CN105629625A (en) * | 2016-03-02 | 2016-06-01 | 北方工业大学 | Dual microring resonant cavity differential delay based all-optical logic exclusive OR gate |
| WO2016095845A1 (en) * | 2014-12-19 | 2016-06-23 | 深圳大学 | Photonic crystal all-optical anti-interference self-locking trigger switch |
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2016
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| EP1271114A2 (en) * | 2001-06-29 | 2003-01-02 | Fujitsu Limited | Method and device for measuring the waveform of an optical signal |
| US6952172B1 (en) * | 2004-03-19 | 2005-10-04 | Lucent Technologies Inc. | All-optical linear feedback shift register |
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