CN104660334B - Serial-to-parallel optical converter with high port number enlarging convenience - Google Patents
Serial-to-parallel optical converter with high port number enlarging convenience Download PDFInfo
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Abstract
The invention discloses a serial-to-parallel optical converter with high port number enlarging convenience. The serial-to-parallel optical converter is based on an SLALOM (Semiconductor Lase Amplifier in a Loop Mirror) mixed structure in which M rows and N lines of SLALOM units are combined. Row time delay and line time delay, as well as the temporal relation between signals and control pulses are set according to an input optical pulse signal rate, so as to realize 1 to M*N serial-to-parallel conversion. Compared with a converter adopting a pure serial (cascade) structure, the serial-to-parallel optical converter adopting the parallel and serial mixed structure is shorter in cascade length, and higher in output signal quality. Moreover, the number of parallel output ports can be enlarged greatly by enlarging the parallel number; the serial-to-parallel optical converter can be used in high-speed de-multiplex system, an optical information processing system and an optical exchange system in the optical communication field.
Description
Technical field
The invention belongs to technical field of optical fiber communication, more specifically, it is related to a kind of light string being easy to ECP Extended Capabilities Port number
And transducer.
Background technology
With the development of Fibre Optical Communication Technology, the new optical transport skill such as coherent reception, palarization multiplexing, light OFDM
Art makes fiber-optic transmission rate more and more higher.Optical information processing simultaneously and optical switched technology is limited to optical logic device and light is random
Memorizer, also cannot realize full light high speed processing, still depend on the electrical domain after opto-electronic conversion and process.By high-speed serial signals
Be converted to speed parallel signals and be identified and process being a kind of common solution.Speed due to electric deserializer is subject to
It is limited to electric capacity, the impact of inductance parasitic parameter, therefore, light serioparallel exchange, directly carry out serioparallel exchange in area of light, become research
Hot issue.
In order to realize the full light serioparallel exchange of high-speed optical signal, existing many correlational studyes at present.The propositions such as Wang Ju
AOSPC scheme is to convert two parts by the generation of wavelength-division/impulse time light source with order multi-wavelength to constitute (referring to document:King
Chrysanthemum, in the .40Gb/s such as Jin Long to 8 road 5Gb/s full light serioparallel exchange experimentation [J]. Acta Optica, 2011,31 (5):6001-
6012).Using Cross-phase Modulation (Cross-Phase Modulation, the XPM) effect of the SOA, (control of serial input optical signal
Light processed) cause the generation that the red shifted chirp to wavelength-division/time-division light pulse (detection light) warbled with blue shift, then leached by wave filter
The blue shift part of warbling detecting light is achieved that and copies on wavelength-division/time-division light pulse sequence by high speed serialization optical signal information,
Wavelength-division/time-division light pulse sequence has just obtained the low speed output optical signal of multidiameter delay after wavelength-division demultiplexing, and this scheme is realized
The serial input optical signal of 40Gb/s is converted to the parallel output signal of 8 road 5Gb/s.The propositions such as Wen Jianghong based on optical fiber
The full light serioparallel exchange scheme of middle four-wave mixing effect is (referring to document:Wen Jianghong, Jiang Yang etc. based on four-wave mixing in fiber effect
The full light string-answered study on the transformation [J]. Application Optics, 2011,32 (3):535-539), using the GVD in optical fiber,
One tunnel is divided narrow clock pulses and in time domain broadening and with data signal, four-wave mixing effect occurs, by leaching different frequency
It is achieved that the full light string-of high speed translation function, this scheme achieves and is converted into the RZ code signal of a road 40Gb/s ideler frequency light
For 4 road 10Gb/s signals.
Nonlinear optical loop mirror (Nonlinear Optical Loop Mirror, NOLM) is that one kind realizes all-optical information
The common structure processing, but because in silica fibre nonlinear effect weaker, need several kilometers of long fiber optic loop and very strong control
Luminous power could obtain sufficiently large nonlinear phase shift.Using travelling-wave semiconductor optical amplifier (SOA) as nonlinear optical element
SLALOM is constituted in the optical fiber insertion loop replacing several kilometers long.Compared with optical fiber, semiconductor optical amplifier has small volume, non-
Linear refractive rate coefficient is big, required control luminous power is low, need not consider dispersive influence, compact conformation, the outstanding advantages such as easy of integration,
It is subject to the extensive attention of countries in the world scientist in recent years.So far, SLALOM has realized multi-signal processing function.As demultiplexed
Extracted with, Optical Clock, shaping pulse and broad band wavelength conversion etc..
Applicant proposed the patent of invention of " a kind of light deserializer based on SLALOM " on 07 16th, 2014
Application, this application was announced on October 08th, 2014, and application publication number is CN104092497A.Light serioparallel exchange in this application
The high-speed optical signal of serial, using the structure of cascade SLALOM, can be converted to parallel by device using SLALON " photoswitch " characteristic
Multi-path low speed signal.This technical scheme improves conversion efficiency, and so that processing procedure is simplified, but the increase with cascade number,
It is serious that the accumulation of SOA noise can become, and leads to signal quality to decline.
Content of the invention
It is an object of the invention to overcoming the deficiencies in the prior art, provide a kind of light serioparallel exchange being easy to ECP Extended Capabilities Port number
Device, on the basis of existing SLALOM light deserializer, is further improved to its structure, to reduce after multistage SLALOM
The degradation of serial optical signal.
For achieving the above object, present invention is easily extended the light deserializer of port number is it is characterised in that wrap
Include：
The SLALOM light serioparallel exchange unit of M row cascade, every i row SLALOM light serioparallel exchange unit includes again：N number of partly lead
Body image intensifer loop mirror (Semiconductor Laser Amplifier in a Loop Mirror, abbreviation SLALOM) S
(i, j), N number of optical circulator C (i, j), N-1 row delay unit DC(i, j), wherein, i represents capable, and j represents row；It connects pass
It is to be：The port 2 of optical circulator C (i, 1) connects the input port A of SLALOM S (i, 1), the port 1 of optical circulator C (i, 1)
By row delay unit DC(i, 1) connects the port 3 of optical circulator C (i, 2)；The port 2 of optical circulator C (i, 2) connects
Row delay unit D is passed through in the port 1 of the input port A of SLALOM S (i, 2), optical circulator C (i, 2)C(i, 2) connects light and goes in ring
The port 3 of device C (i, 3)；……；The port 2 of optical circulator C (i, N-1) connects the input port A of SLALOM S (i, N-1), light
Row delay unit D is passed through in the port 1 of circulator C (i, N-1)C(i, N-1) connects the port 3 of optical circulator C (i, N)；Light annular
The port 2 of device C (i, N) connects the input port A of SLALOM S (i, N)；
1 × M optical branching device and M-1 line delay cells D1～M-1, the serial optical signal of input divides by 1 × M optical branching device
Go out M road, line delay cells D is passed through on wherein M-1 road respectively1～M-1It is input to optical circulator C (1, N), C (2, N) ..., C (M-1,
N port 1), a remaining road directly inputs the port 1 of Optical circulator C (M, N)；
1 × (M × N) optical branching device, input connects and controls light pulse signal, the M of 1 × (M × N) optical branching device × N number of
Outfan connects control port C of each SLALOM in described M row SLALOM light serioparallel exchange unit respectively；
According to the setting row, column delay unit time delay of the speed of incoming serial optical signal so that in M × N number of bit serial light
In the signal moment, M × N number of bit optical signal arrives separately at M × N number of SLALOM of the SLALOM light serioparallel exchange unit of M row cascade；
When controlling light pulse signal not control light pulse, the light pulse of high speed serialization optical signal enters from input port
After SLALOM, reflect output from input port；And when controlling light pulse signal to have control light pulse, the light of high speed serialization optical signal
Pulse is after input port enters SLALOM from output port transmission output；
After row, column delay unit time delay, in M × N number of bit serial optical signal moment, control the control of light pulse signal
Light pulse processed reaches the control of each SLALOM in each row SLALOM light serioparallel exchange unit through 1 × (M × N) optical branching device
Port, and open the output window of each SLALOM so that the light pulse of each SLALOM transmission I/O arrival, make high speed
The each bit of serial optical signal exports from each SLALOM, thus realizing the conversion of low-speed parallel optical signal.
The goal of the invention of the present invention is realized in：
Present invention is easily extended the light deserializer of port number is based on SLALOM (Semiconductor Laser
Amplifier in a Loop Mirror, semiconductor optical amplifier loop mirror) mixed structure light deserializer, this light string
And transducer adopts M row, the mixed structure of N row SLALOM unit combination, arranges line delay according to input optical pulse signal rate
With row time delay, and signal with control pulse sequential relationship, can achieve 1 arrive M × N road serioparallel exchange.This light serioparallel exchange
Device, due to the mixed structure using parallel and serial, decreases cascade length compared to pure serial (cascade) structure, improves defeated
Go out signal quality.Additionally, pass through to increase and number of lines simultaneously, can significantly extend parallel output port number, can be used for
In high speed demultiplexing in optical communication field, optical information processing and optical switching system.
Brief description
Fig. 1 is present invention is easily extended a kind of schematic diagram of specific embodiment of the light deserializer of port number；
Fig. 2 is the structural representation of SLALOM shown in Fig. 1；
Fig. 3 is the structural representation of optical circulator shown in Fig. 1；
The serial optical signal (bit sequence) of Fig. 4 input and the schematic diagram of parallel output port, wherein, (a) is corresponding to postpone
The unit plan of establishment one, b) the corresponding delay cell plan of establishment two；
Fig. 5 is the sequential chart between input and output optical pulse signal, and wherein, (a) corresponds to the delay cell plan of establishment one,
B) the corresponding delay cell plan of establishment two；
Fig. 6 is the serial light pulse signal of input；
Fig. 7 is the serial light pulse signal of input is 4 tunnel output signals during 80 light pulses, wherein, (a) be the (1,
1) road optical signal, (b) is (2,2) road optical signal, and (c) is (3,3) road optical signal, and (d) is (4,4) road optical signal；
Fig. 8 is the eye pattern that the serial light pulse signal inputting is 4 tunnel output signals during 80 light pulses, and wherein, (a) is
(1,1) road optical signal eye pattern, (b) is (2,2) road optical signal eye pattern, and (c) is (3,3) road optical signal eye pattern, and (d) is the
(4,4) road optical signal eye pattern.
Specific embodiment
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described, so that those skilled in the art is preferably
Understand the present invention.Requiring particular attention is that, in the following description, when known function and design detailed description perhaps
Can desalinate the present invention main contents when, these descriptions will be ignored here.
Embodiment
Fig. 1 is present invention is easily extended a kind of schematic diagram of specific embodiment of the light deserializer of port number.
In the present embodiment, as shown in figure 1, present invention is easily extended the light deserializer of port number includes：
M × N number of SLALOM S (i, j), i=1,2 ... ..., M, j=1,2 ... ..., N；
M × N number of optical circulator C (i, j) i=1,2 ..., M, j=1,2 ..., N；
M × N-1 delay unit DC(i, j) i=1,2 ..., M, j=1,2 ..., N-1；
And 1 × M optical branching device, 1 × (M × N) optical branching device.
Incoming serial optical signal is divided into by M row using 1 × M optical branching device, line delay unit is passed through on wherein M-1 road respectively
D1～M-1It is input to optical circulator C (1, N), C (2, N) ..., the port 1 of C (M-1, N) is CI1, a remaining road directly inputs
The port 1 of Optical circulator C (M, N) is CI1.
N number of optical circulator C (i, j), j=1,2 ... ..., N, N-1 row delay unit DC(i, j), j=1,2 ... ..., N-
1 series connection i row SLALOM S (i, j), j=1,2 ... ..., N, 1 × (M × N) optical branching device provides synchronous control for SLALOM at different levels
Light pulse processed.
In Fig. 1 three ports of M × N number of SLALOM respectively correspond to Fig. 2 in SLALOM structure A, B, C-terminal mouth,
The structure of SLALOM is as shown in Fig. 2 by 1 SOA, 12 × 2 3dB optical branching device, 22 × 1 wavelength division multiplexers
(WDM1 and WDM2, operation wavelength is λ1And λ2, wherein WDM1 is used for wavelength-division multiplex, and WDM2 is used for wavelength-division and demultiplexes) and the ring that forms
Shape structure, the main flashlight that includes inputs, controls light input and three ports of signal light output.If a length of λ of signal light-wave1, control
The a length of λ of light wave processed2.Input port A and B of 3dB optical branching device is respectively the flashlight input and output port of SLALOM；3dB
The output port of optical branching device connects the λ of WDM1 and WDM2 respectively1Wavelength input port；Control the λ from WDM1 for the light pulse2Port C
Input, and the λ from WDM22Port D exports；The multiplexed output ports of WDM1 and WDM2 connect two optical ports of SOA respectively, and
Guarantee the central point shifted by delta τ time spread length that SOA is relative to ring.
Fig. 2 is the structural representation of SLALOM shown in Fig. 1.
As shown in Fig. 2 the operation principle of SLALOM is as follows：
1), the flashlight of input is divided into clockwise (CW) through 3dB optical branching device and inverse clock (CCW) both direction passes
Broadcast；
2), when no controlling light pulse, CW and CCW light is propagated a circle in ring and is almost obtained identical gain and phase shift；
When returning to 3dB optical branching device and being coupled, will produce in the A port of 3dB optical branching device and interfere mutually long, and B port will then be interfered
By from the output of the A port of 3dB optical branching device, that is, the optical signal inputting is reflected by SLALOM for cancellation, therefore optical signal；
3), when there being control light pulse, XPM characteristic when SOA for the light pulse is controlled to cause CW and CCW light to produce additional
Phase shift；Because SOA has Δ τ time migration relative to ring midpoint so that the time migration of CW and CCW light additive phase is 2 Δ τ；
When CW and CCW light returns to 3dB optical branching device, open window so that input optical signal passes through in B port by forming one
SLALOM exports from B port.
Fig. 3 is the structural representation of optical circulator shown in Fig. 1.
As indicated at 3, it has three ports 1～3 is CI to the concrete structure schematic diagram of optical circulator1, CI2, CI3Port, light
The concrete operating principle of circulator is prior art, will not be described here.
Present invention is easily extended being implemented as follows of the light deserializer of port number：
1), the input of 1 × M optical branching device connects incoming serial optical signal, M-1 outfan of 1 × M optical branching device
Connect line delay cells D respectively1, D2... ..., DM-1Input port, m-th outfan need not connect line delay unit, directly
The input port connecting optical circulator C (M, N) is port 1 (CI1Port)；
2), line delay cells D1, D2... ..., DM-1Output port connects optical circulator C (1, N), C (2, N) respectively ...,
The port 1 of C (M-1, N) is CI1Port, optical circulator C (1, N), C (2, N) ... ..., C (M-1, N), the port 2 of C (M, N) is
CI2Port connects SLALOM S (1, N), S (2, N) ... ..., S (M-1, N), S (M, N) respectively, optical circulator C (1, N), C (2,
...), N C (M-1, N), the port 3 of C (M, N) is CI3Port connects row delay unit D respectivelyC(1,N-1),DC(2,N-
1),……,DC(M-1,N-1),DC(M, N-1) input port, row delay unit DC(1,N-1),DC(2,N-1),……,DC(M-
1,N-1),DCThe port 1 that (M, N-1) output port even connects next optical circulator respectively is CI1Port, order successively, using row
SLALOM structure is cascaded up by delay unit and optical circulator；
3), the input of 1 × (M × N) optical branching device connects and controls light pulse signal, and the M of 1 × (M × N) optical branching device ×
N number of outfan connects S (1,1) respectively ... ..., and the C-terminal mouth of S (M, N) is control port.
4), the delay unit plan of establishment one：
A), line delay cells D is set1, D2... ..., DM-1Value：D1It is equal to (M-1) × N × Tb, D2Be equal to (M-2) × N ×
Tb... ..., DM-1Equal to 1 × N × Tb；Row time delay elements between setting SLALOM ring are equal to Tb；Wherein TbFor serial input light
Pulse signal bit interval；
B), the serial light pulse signal of input is through 1 × M optical branching device, row/column delay unit, optical circulator, serial optical
Pulse reaches each SLALOM and has following relation：Input the 1st, 2 ... N number of bit optical signal arrives separately at the first row SLALOM：
S(1,1)、S(1,2)、……S(1,N)；Input N+1, N+2 ... 2N bit optical signal arrives separately at the second row
SLALOM：S(2,1)、S(2,2)、……S(2,N)；……；Input (M-1) × N+1, (M-1) × N+2 ... M × N number of ratio
Special optical signal arrives separately at M row SLALOM：S (M,1)、S (M,2)、……S (M,N).
5), the delay unit plan of establishment two：
A), line delay cells D is set1, D2... ..., DM-1Value：D1It is equal to (M-1) × Tb, D2Be equal to (M-2) ×
Tb... ..., DM-1Equal to 1 × Tb；Row time delay elements between setting SLALOM ring are equal to M × Tb；Wherein TbFor serial input light
Pulse signal bit interval；
B), serial input light pulse signal is through 1 × M optical branching device, row/column delay unit, optical circulator, serial input
Light pulse reaches each SLALOM and has following relation：Input the 1st, 2 ... M bit optical signal arrives separately at first row
SLALOM：S(1,1)、S(2,1)、……S(M,1)；Input M+1, M+2 ... 2M bit optical signal arrives separately at second
Row SLALOM：S(1,2)、S(2,2)、……S(M,2)；……；Input (N-1) × M+1, (N-1) × M+2 ... N × M
Bit optical signal arrives separately at Nth column SLALOM：S(1,N)、S(2,N)、……S(M,N).
6), setting control light pulse signal in time domain with each cycle (N × M bit optical signal) sequence in
Latter bit optical signal aligns；So that in the above time delay plan of establishment one or two, control pulse to reach each simultaneously
SLALOM；Thus realize N × M bit optical signal export from each SLALOM simultaneously.
The operation principle of the present invention is as follows：
1), when not controlling light pulse, after light pulse signal enters SLALOM, reflect output from input port；And have
When controlling light pulse, light pulse signal exports from the output port transmission of SLALOM；
2), the delay unit plan of establishment one：
A), the serial optical signal sequence in a cycle (N × M bit optical signal) of input is b1, b2... ..., bMN
(corresponding timing position is：T1, T2... ..., TMN), serial input optical signal is divided into M row through 1 × M optical branching device, due to row
Delay unit D1, D2... ..., DM-1Postpone to successively decrease for tolerance N number of ratio so that adjacent traveling optical signal misplaces with N number of bit optical signal
Special optical signal, defines the 1st row sequence b1, b2... ..., bNWith the 2nd row sequence bN+1, bN+2... ..., b2NWith M row sequence
b(M-1)N+1, b(M-1)N+2... ..., bMNSynchronous；
B), in each row, when uncontrolled pulse each SLALOM be in reflective condition so that serial input optical signal by by
Level reflexes to next SLALOM；And because row time delay size is serial input optical signal bit period so that serial input light
Along in every row transmitting procedure, each bit signal synchronously arrives at each SLALOM to signal, and in combining a) each row mismatch synchronization special
Property, can achieve the 1st row sequence b1, b2... ..., bNSynchronously arrive at SLALOM：S (1,1), S (1,2) ... ..., S (1, N), same with this
When the 2nd row sequence bN+1, bN+2... ..., b2NSLALOM can be synchronously arrived at：S (2,1), S (2,2) ... ..., S (2, N), meanwhile
M row sequence b(M-1)N+1, b(M-1)N+2... ..., bMNSLALOM can be synchronously arrived at：S (M, 1), S (M, 2) ... ..., S (M, N).
C), now, control light pulse to synchronously arrive at each SLALOM through 1 × (M × N) optical branching device, and open each
The output window of SLALOM is so that each SLALOM exports the optical signal reaching, thus realizing M × N road parallel output.
3), the delay unit plan of establishment two：
A), the serial optical signal sequence in a cycle (N × M bit optical signal) of input is b1, b2... ..., bMN
(corresponding timing position is：T1, T2... ..., TMN), serial optical signal is divided into M row through 1 × M optical branching device, due to line delay
Cells D1, D2... ..., DM-1Postpone to successively decrease for tolerance the 1 bit light so that adjacent traveling optical signal misplaces with 1 bit optical signal
Signal is so that row sequence b1, b2... ..., bMSynchronous, row sequence bM+1, bM+2... ..., b2MSynchronous ... ..., row sequence b(N-1)M+1,
b(N-1)M+2... ..., bMNSynchronous；
B), in each row, when uncontrolled pulse each SLALOM be in reflective condition so that serial input optical signal by by
Level reflexes to next SLALOM；And because row time delay size is M serial input optical signal bit period so that serial input
Along in every row transmitting procedure, each bit signal synchronously arrives at each SLALOM to optical signal, and in combining a) each row mismatch synchronization
Characteristic, can achieve the 1st row sequence b1, b2... ..., bMSynchronously arrive at SLALOM：S (1,1), S (2,1) ... ..., S (M, 1), with this
2nd row sequence b simultaneouslyM+1, bM+2... ..., b2MSLALOM can be synchronously arrived at：S (1,2), S (2,2) ... ..., S (M, 2), same with this
When Nth row sequence b(N-1)M+1, b(N-1)M+2... ..., bMNSLALOM can be synchronously arrived at：S (1, N), S (2, N) ... ..., S (M, N).
C), now, control light pulse to synchronously arrive at each SLALOM through 1 × (M × N) optical branching device, and open each
The output window of SLALOM is so that each SLALOM exports the optical signal reaching, thus realizing M × N road parallel output.
According to principles above, corresponding relation such as table 1 institute of the bit sequence of incoming serial optical signal and parallel output port
Show, table 1 (a) is the delay unit plan of establishment one corresponding relation, table 1 (b) is the delay unit plan of establishment two corresponding relation.
| Serial bit sequence | b1 | b2 | … | bN | bN+1 | bN+2 | … | bN*2 | …… | b(M-1)N+1 | b(M-1)N+2 | … | bMN |
| Parallel output port | (1,1) | (1,2) | … | (1,N) | (2,1) | (2,2) | … | (2,N) | …… | (M,1) | (M,2) | … | (M,N) |
(a)
| Serial bit sequence | b1 | b2 | … | bM | bM+1 | bM+2 | … | bM*2 | …… | bM(N-1)+1 | bM(N-1)+2 | … | bMN |
| Parallel output port | (1,1) | (2,1) | … | (M,1) | (1,2) | (2,2) | … | (M,2) | …… | (1,N) | (2,N) | … | (M,N) |
(b)
Table 1
The serial optical signal (bit sequence) of Fig. 4 input and the schematic diagram of parallel output port.
The serial optical signal (bit sequence) of input is with the schematic diagram of parallel output port as shown in figure 4, Fig. 4 (a) is to prolong
The Shi Danyuan plan of establishment one output relation, Fig. 4 (b) is the delay unit plan of establishment two output relation.
Fig. 5 is the sequential chart between input and output optical pulse signal.
The serial light pulse signal (bit sequence) of input, controls light pulse and exports the sequential chart between parallel optical signal
As shown in figure 5, control in light pulse and a cycle in incoming serial optical signal needing in the M × N number of light pulse extracted
An optical pulse synchronization afterwards.Fig. 5 (a) is the sequential chart in the case of the delay unit plan of establishment one：M × N number of light pulse T1,
T2... ..., TN；TN+1, TN+2... ..., T2N；……；T(M-1)N+1, T(M-1)N+2... ..., TMNTo be respectively outputted to corresponding S (1,
1), S (1,2) ... ..., S (1, N)；S (2,1), S (2,2) ... ..., S (2, N)；……；S (M, 1), S (M, 2) ... ..., S (M,
N B port)), forms M × N road parallel output port；Fig. 4 (b) is the sequential in the case of the delay unit plan of establishment two
Figure：M × N number of light pulse T1, T2... ..., TM；TM+1, TM+2... ..., TM*2；……；TM*(N-1)+1, TM*(N-1)+2... ..., TMNTo divide
Do not export corresponding S (1,1), S (2,1) ... ..., S (M, 1)；S (1,2), S (2,2) ... ..., S (M, 2)；……；S(1,
N), S (2, N) ... ..., S (M, N)) B port, form M × N road parallel output port.
Example
Using the delay unit plan of establishment one, obtained through the light deserializer of 4 row, 4 row with 80Gb/s serial optical signal
To as a example 16 road 5Gb/s parallel light signaling plans.
Design cycle according to the present invention：
(1) according to incoming serial optical signal rate 80Gb/s, calculate bit interval TbFor 12.5ps；
(2) select delay unit：Line delay cells D1, D2, D3Value be respectively 12Tb, 8Tb, 4Tb；Row delay unit is
Tb；
(3) SLALOM type selecting：
A), the selection of SOA：The center operating wavelength of SOA is 1605nm, gain spectral width is 122.5nm；
B), the selection of WDM：λ1For 1545nm, λ2For 1579nm；
C), other SLALOM parameters are as shown in table 2.
Table 2
(4) selection of optical circulator：Insertion loss is less than 1dB, and return loss is more than 35dB；
(5) according to Fig. 1, build light deserializer.
(6) control pulse sequence setting：As shown in Fig. 5 (a), control pulse and last bit of incoming serial optical information
Synchronous so that controlling last light pulse in pulse and cycle to reach the time synchronized of S (4,4) so that in a cycle
Each light pulse signal when reaching each SLALOM, control light pulse signal to simultaneously act on each SLALOM so that each
Light pulse signal exports from the output window transmission of SLALOM.
Professional simulation software OptiSystem carries out system emulation：
1) in light deserializer, 80 serial light pulse signals of input are as shown in fig. 6, its binary code is：
“0110010100010010,0110100010110110,1100011100000110,0000000001010001,
1000001100010101”；Corresponding relation according to table 1 (a) bit sequence and parallel port output：Each output port
Signal is as shown in table 3：
Table 3
Wherein (1,1), (2,2), (3,3), the parallel light signal output of (4,4) output port is as shown in Figure 7；
2) (1,1), (2,2), (3,3), the eye pattern of (4,4) output port, as shown in figure 8, eye opening is preferable.
This embodiment demonstrates the correctness of light deserializer function of the present invention, and after serioparallel exchange, signal quality is good, says
The feasibility of clear scheme.
Although to the present invention, illustrative specific embodiment is described above, in order to the technology of the art
Personnel understand the present invention, the common skill it should be apparent that the invention is not restricted to the scope of specific embodiment, to the art
For art personnel, as long as various change is in the spirit and scope of the present invention of appended claim restriction and determination, these
Change is it will be apparent that all utilize the innovation and creation of present inventive concept all in the row of protection.
Claims (3)
1. a kind of light deserializer being easy to ECP Extended Capabilities Port number is it is characterised in that include：
The SLALOM light serioparallel exchange unit of M row cascade, every i row SLALOM light serioparallel exchange unit includes again：N number of semiconductor light
Amplifier loop mirror (Semiconductor Laser Amplifier in a Loop Mirror, abbreviation SLALOM) S (i,
J), N number of optical circulator C (i, j), N-1 row delay unit DC(i, j), wherein, i represents capable, and j represents row；Its annexation
For：The port 2 of optical circulator C (i, 1) connects the input port A of SLALOM S (i, 1), and the port 1 of optical circulator C (i, 1) leads to
Cross row delay unit DC(i, 1) connects the port 3 of optical circulator C (i, 2)；The port 2 of optical circulator C (i, 2) connects SLALOM
Row delay unit D is passed through in the port 1 of the input port A of S (i, 2), optical circulator C (i, 2)C(i, 2) connection optical circulator C (i,
3) port 3；……；The port 2 of optical circulator C (i, N-1) connects the input port A of SLALOM S (i, N-1), optical circulator
Row delay unit D is passed through in the port 1 of C (i, N-1)C(i, N-1) connects the port 3 of optical circulator C (i, N)；Optical circulator C (i,
N port 2) connects the input port A of SLALOM S (i, N)；
1 × M optical branching device and M-1 line delay cells D1～M-1, the serial optical signal of input separates M road by 1 × M optical branching device,
Wherein line delay cells D is passed through on M-1 road respectively1～M-1It is input to optical circulator C (1, N), C (2, N) ..., the end of C (M-1, N)
Mouth 1, a remaining road directly inputs the port 1 of Optical circulator C (M, N)；
1 × (M × N) optical branching device, input connects control light pulse signal, M × N number of output of 1 × (M × N) optical branching device
End connects control port C of each SLALOM in described M row SLALOM light serioparallel exchange unit respectively；
According to the setting row, column delay unit time delay of the speed of incoming serial optical signal so that in M × N number of bit serial optical signal
In the moment, M × N number of bit optical signal arrives separately at M × N number of SLALOM of the SLALOM light serioparallel exchange unit of M row cascade；
When controlling light pulse signal not control light pulse, the light pulse of high speed serialization optical signal enters from input port
After SLALOM, reflect output from input port；And when controlling light pulse signal to have control light pulse, the light of high speed serialization optical signal
Pulse is after input port enters SLALOM from output port transmission output；
After row, column delay unit time delay, in M × N number of bit serial optical signal moment, control the control light of light pulse signal
Pulse reaches the control end of each SLALOM in each row SLALOM light serioparallel exchange unit through 1 × (M × N) optical branching device
Mouthful, and open the output window of each SLALOM so that the light pulse of each SLALOM transmission I/O arrival, make the string of high speed
The each bit of traveling optical signal exports from each SLALOM, thus realizing the conversion of low-speed parallel optical signal.
2. smooth deserializer according to claim 1 it is characterised in that the described delay unit plan of establishment for the moment
For：
A), line delay cells D is set1, D2... ..., DM-1Value：D1It is equal to (M-1) × N × Tb, D2Be equal to (M-2) × N ×
Tb... ..., DM-1Equal to 1 × N × Tb；Row time delay elements between setting SLALOM ring are equal to Tb；Wherein TbFor serial input light
Pulse signal bit interval；
B), the serial light pulse signal of input is through 1 × M optical branching device, row/column delay unit, optical circulator, serial light pulse
Reach each SLALOM and there is following relation：Input the 1st, 2 ... N number of bit optical signal arrives separately at the first row SLALOM：S(1,
1)、S(1,2)、……S(1,N)；Input N+1, N+2 ... 2N bit optical signal arrives separately at the second row SLALOM：S
(2,1)、S(2,2)、……S(2,N)；……；Input (M-1) × N+1, (M-1) × N+2 ... M × N number of bit optical signal
Arrive separately at M row SLALOM：S(M,1)、S(M,2)、……S(M,N).
3. smooth deserializer according to claim 1 is it is characterised in that during the described delay unit plan of establishment two
For：
A), line delay cells D is set1, D2... ..., DM-1Value：D1It is equal to (M-1) × Tb, D2It is equal to (M-2) × Tb... ...,
DM-1Equal to 1 × Tb；Row time delay elements between setting SLALOM ring are equal to M × Tb；Wherein TbFor serial input light pulse signal
Bit interval；
B), serial input light pulse signal is through 1 × M optical branching device, row/column delay unit, optical circulator, serial input light arteries and veins
It is flushed to and reach each SLALOM there is following relation：Input the 1st, 2 ... M bit optical signal arrives separately at first row SLALOM：S
(1,1)、S(2,1)、……S(M,1)；Input M+1, M+2 ... 2M bit optical signal arrives separately at secondary series SLALOM：
S(1,2)、S(2,2)、……S(M,2)；……；Input (N-1) × M+1, (N-1) × M+2 ... N × M bit light is believed
Number arrive separately at Nth column SLALOM：S(1,N)、S(2,N)、……S(M,N).
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