CN110176960A - A kind of novel single fiber bi-directional multichannel input optical module - Google Patents
A kind of novel single fiber bi-directional multichannel input optical module Download PDFInfo
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- CN110176960A CN110176960A CN201910565420.7A CN201910565420A CN110176960A CN 110176960 A CN110176960 A CN 110176960A CN 201910565420 A CN201910565420 A CN 201910565420A CN 110176960 A CN110176960 A CN 110176960A
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- 239000000835 fiber Substances 0.000 title claims abstract description 25
- 238000005538 encapsulation Methods 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000013307 optical fiber Substances 0.000 abstract description 21
- 238000012546 transfer Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 9
- 210000004209 hair Anatomy 0.000 description 8
- 239000000306 component Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000002457 bidirectional effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000005622 photoelectricity Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2589—Bidirectional transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/40—Transceivers
Abstract
The present invention discloses a kind of novel single fiber bi-directional multichannel input optical module, for solve the problems, such as existing for existing common optical module it is at high cost, device size is excessive, optical module of the invention, CDR is replaced using Gearbox chip, further include: laser, PD, WDM multiplexer and transmitting-receiving BIDI module, when light is sent, two-way input NRZ electric signal is multiplexed into PAM4 electric signal all the way by Gearbox；The electric signal of output all the way of Gearbox is converted to optical signal per the corresponding laser of output electric signal, laser all the way by Gearbox；If main line optical signal is combined by WDM multiplexer and is signaled all the way through BIDI module transfer；When light-receiving, restores the optical signal of corresponding number by demultiplexer through several optical wavelength composition WDM signals of the received routing of BIDI module, be converted to electric signal through PD detector；Optical module of the invention realizes simple optical fiber input and output optical signal.
Description
Technical field
The invention belongs to fiber optic communication field of optical networks, in particular to a kind of to meet the input of multichannel power port, single fiber optical port
Output input photoelectric device.
Background technique
Optical interconnection has many advantages, such as that high speed, high density, high bandwidth, height are anti-interference.Currently, more and more systems use light
Interconnection technique, large-scale application are more and more.WDM technology, BIDI technology are well suited for optical module high density in system, and miniaturization is set
Meter, can meet the present and following optical interconnection needs very well.
WDM (Wavelength Division Multiplexing, wavelength-division multiplex) is using multiple lasers in single
The technology of multi beam different wave length laser is sent or received on optical fiber simultaneously, each signal has after data are modulated in its independence
Hold, realizes simultaneous transmission independence different wave length over the same fiber, optical fiber transmission capacity is greatly improved.
One kind of TIA (trans-impedance amplifier, trans-impedance amplifier) Amplifier type, Amplifier type
It is to be defined according to the type of its input/output signal.TIA is generally used for high speed circuit due to having the advantages that high bandwidth,
As generally used in photoelectricity transmission communication system.
LDD (Laser Diode Driver, semiconductor laser drive) semiconductor laser drive, to will be electric
In signal loading to laser, gone out by optical transport.
BIDI (Bidirectional, two-way) simplex optical module will realize the optical signal of transmitting-receiving both direction simultaneously
Transmission needs transmit-receive position to use different optical wavelength.Only one port of simplex optical module, passes through the filter in optical module
Wave device is filtered, and is completed at the same time the transmitting an of wavelength channels and the reception of another wavelength channels.For example, local terminal is sent out
The optical signal of 1310nm is penetrated, while receiving the optical signal of 1550nm.And the wavelength that opposite end uses is just with local terminal on the contrary, emit
The optical signal of 1550nm receives the optical signal of 1310nm.BIDI module must use in pairs in both link ends.
PAM4 (4Pulse Amplitude Modulation, four level pulse amplitudes modulation) is the same rate the case where
The requirement of lower bandwidth is that the half of NRZ is compiled for most of high speed cable, backboard and connector using PAM4
Code can have same nyquist frequency in the case where rate is double.In the case where phase same rate compare NRZ and
The modulation system of four level is utilized in PAM4, PAM4, exchanges halving for nyquist frequency for by sacrificing signal-to-noise ratio.
PAM-4gearbox is a kind of to be converted into suitable rate PAM4 signal physical chip for NRZ signal, sees Fig. 1, a kind of
4x25G NRZ signal is converted into 2x50G PAM4 signal.
QSFP (Quad Small Form-factor Pluggable, four-way SFP interface) is to meet market pair
The demand of the more highdensity pluggable solution of high speed and a kind of optical mode block type being born.
Optical module core component includes optical device and electrical part.It is to turn to realize through optical fiber transmission one by photoelectricity that it, which is acted on,
Rate information is determined to a distant place.At present in the framework of optical-fiber network, to save fiber resource, photoelectric device all uses the knot of single fiber bi-directional
Structure will emit component and receive component package in same device.Commonly known as single-fiber bidirectional device.But it is existing
The single-fiber bidirectional device problem excessively high there is also cost, it is specific:
Common optical module a pair of receiving and transmitting signal channel needs an one light receiving device part of hair, and transmission needs 2 optical fiber.Column are such as, full
The optical module QSFP28 of sufficient QSFP MSA agreement, power port input 4 channel 25G NRZ signals and need 4 according to conventional design framework
4 light receiving device parts are sent out, transmission needs 8 optical fiber；Higher cost during existing common optical module.
Summary of the invention
The present invention is to reduce optical-fiber network physical layer cost, proposes a kind of novel single fiber bi-directional multichannel input optical module, adopts
It is used in combination with WDM and BIDI, more reduction fiber resource uses, and combines and be applicable in PAM4 pattern signal, is increasing channel
Simultaneously, retainer member frequency bandwidth reduces high-frequency element cost to data transmission rate.
The technical solution adopted by the present invention are as follows: a kind of novel single fiber bi-directional multichannel input optical module, using Gearbox core
Piece replaces CDR (Clock and Data Recovery, clock and data recovery), further includes: laser, PD detector, WDM are multiple
With device, demultiplexing optical device and transmitting-receiving BIDI module, transmitting and receiving circuit is specifically included；
The transmit circuit are as follows: two-way input electrical signal is multiplexed into electric signal all the way, Gearbox core by Gearbox chip
The electric signal number of the output of piece is the half of input signal number, and Gearbox chip swashs per output electric signal corresponding one all the way
The electric signal of output all the way of Gearbox chip is converted to optical signal by light device, laser；If main line optical signal is multiplexed by WDM
Device is transmitted after being combined into wdm optical signal all the way through transmitting-receiving BIDI module；
The reception circuit are as follows: the wdm optical signal inputted through BIDI module, demultiplexed optical device are divided into corresponding number
Optical signal, the corresponding PD detector of optical signal all the way after demultiplexing, optical signal is converted to electric signal through PD detector, converts
Electric signal afterwards is converted by Gearbox chip, and the electric signal number of Gearbox chip output is input Gearbox core
Twice of piece electric signal number.
It further, further include laser driver LDD, it is sharp for the electric signal of the output of Gearbox chip to be loaded into
Light device.
It further, further include TIA circuit, for being exported after being amplified to the electric signal after the conversion of PD detector.
Further, the optical module is encapsulated using BOX or COB is encapsulated.
Further, the optical module is encapsulated using TO CAN pot type.
Further, the optical module is combined using the cell type level Hermetic Package of one with the encapsulation of tradition TO CAN pot type.
Beneficial effects of the present invention: optical module of the invention replaces CDR by using Gearbox chip, in the prior art
On the basis of reduce the transmitting-receiving photoelectric chip of half, greatly reduce the size of entire optical module, and present invention combination WDM
Multiplexer and BIDI module, it is real in the case where guaranteeing chip LDD chip, TIA chip, PD chip and constant laser bandwidth
Existing simple optical fiber input and output optical signal, utmostly saves cost, meets small form factor requirements, and the present invention can be using one
Cell type level Hermetic Package and tradition TO CAN encapsulation be combined together, packaging efficiency is higher, component size is smaller, cost is lower,
Function is more powerful, more conducively produces in enormous quantities.
Detailed description of the invention
Fig. 1 is 4x25G NRZ to 2x50G PAM4Gearbox chip provided in an embodiment of the present invention；
Fig. 2 is one end BIDI optical device A provided in an embodiment of the present invention；
Fig. 3 is other end BIDI optical device B provided in an embodiment of the present invention；
Fig. 4 is the realization side of the single fiber bi-directional multichannel optical module provided in an embodiment of the present invention including BIDI optical device A
Formula；
Fig. 5 is the implementation provided in an embodiment of the present invention including BIDI optical device B single fiber bi-directional multichannel optical module.
Specific embodiment
For in the prior art, common optical module a pair of receiving and transmitting signal channel needs an one light receiving device part of hair, and transmission needs 2
Root optical fiber, the problem that existing optical module is at high cost, device size is larger；Resolving ideas of the invention is as follows:
It is designed by using BIDI, may be implemented only to need an optical fiber sheerly；When input is multichannel, using WDM
Scheme, such as 4 channel electric signals input, and are converted into 4 different wave length optical signals, utilize WDM technology, it is only necessary to which one receives a hair two
Optical fiber；It is applicable in by combining WDM and BIDI technology, may be implemented only to need an optical fiber；But 4 channel signals input, and need
4 lasers and 4 receivers are wanted, 4 photo-signal channels can be become 2 using code conversion technique, to reduce receipts light
The use of device.
A kind of novel single fiber bi-directional multichannel of the invention inputs optical module, comprising: Gearbox chip, laser, PD are visited
Device, WDM multiplexer and transmitting-receiving BIDI module are surveyed, optical module of the invention includes that light is sent and light-receiving two parts；
Light is sent, and two-way input electrical signal is multiplexed into electric signal all the way, the output of Gearbox chip by Gearbox chip
Electric signal number be input signal number half, Gearbox chip is per the corresponding laser of output electric signal all the way, laser
The electric signal of output all the way of Gearbox chip is converted to optical signal by device；If main line optical signal is combined into all the way by WDM multiplexer
It signals through BIDI module transfer；
Light-receiving forms WDM signal by several optical wavelength of the received routing of BIDI module and passes through demultiplexer recovery pair
The optical signal for answering number converts optical signals to electric signal by PD detector；It sends and receivees signal and light is carried out by BIDI
Transmission, realizes simple optical fiber input and output optical signal.
It further include TIA (Tranimpedance Amplifier, trans-impedance amplifier) circuit, for being converted to PD detector
Electric signal afterwards exports after amplifying.LDD increases signal modulation to laser.
Transmitting-receiving BIDI module of the present invention must use in pairs in both link ends, and binary channels as shown in Figure 2,3 is received
Hair BIDI optical device A is to dock optical module with binary channels transmitting-receiving BIDI optical device B, and λ 1, λ 2, λ 3, λ 4 represents 4 kinds of satisfaction design items
Part input and output light.
The single fiber bi-directional multichannel of binary channels BIDI optical device A Yu binary channels BIDI optical device B is set forth in Fig. 4, Fig. 5
Optical module schematic diagram, such as Fig. 5, novel single fiber bi-directional multichannel input optical module, and multichannel inputs NRZ electric signal, by GearBox
Compiling is converted into PAM4 signal, chip LDD, TIA, PD, and laser bandwidth is constant.By taking QSFP28 optical module as an example, 4 road 25G
NRZ input electrical signal is transformed into 2 road 50G PAM4 electric signals by GearBox, full being loaded into electric signal by 2 road LDD
On sufficient WDM laser, 1 road optical signal is synthesized by WDM and is spread out of by optical fiber；And wdm optical signal is passed to by optical fiber, pass through solution
It is multiplexed optical device, is divided into 2 road 50G PAM4 signals, electric signal is become by respective PD, GearBox is passed to by TIA amplification, is led to
GearBox transformation is crossed, the output of 4 road 25G NRZ electric signals is become.This is performed integrally a 100G NRZ optical module transmission function
Energy.Optical transport is carried out using BIDI technology by sending and receiving signal, realizes simple optical fiber input and output optical signal.Fig. 5
Middle MCU is microcontroller, and MCU is worked using the 12C bus marco laser driver LDD of two-wire system, and control chip
GearBox work.
The contents of the present invention are further described below by way of specific example:
Meet the optical module QSFP28 of QSFP MSA agreement, power port inputs 4 channel 25G NRZ signals, according to conventional design
Framework, needs 4 hair, 4 light receiving device part, and transmission needs 8 optical fiber.It being encoded using PAM4 of the invention, WDM and BIDI technology shares,
Entire optical module only needs a Gearbox chip that 4 channel 25GE NRZ signals are converted into 2 channel 50GE PAM4 signals,
It is specific: the CDR chip in existing 4 receipts, 4 hair 25G optical module QSFP28 being substituted using Gearbox chip, saving 2 is realized and receives 2
Luminescence chip, saves the technical effect of 7 optical fiber, saves the cost of optical module to the greatest extent.
The encapsulation of TO CAN pot type can be used in optical device, so that packaging efficiency is higher, component size is small, cost is lower, simultaneously
Coaxial dress equipment capacity at present can also be compatible with；It can also be using other such as BOX encapsulation, COB encapsulation.
It will be appreciated by those skilled in the art that only being arranged using 4x25G emission and reception module as case in above embodiments, the present invention
Optical module implementation apply also for other 4 channel emission and reception modules of rate, be not limited to only 4 channels, can also be 8
Channel, or it is more.
Power port inputs 4 channel 25G NRZ signals and 4 channel 25GE NRZ signals is converted into 2 and are led to by Gearbox chip
Road 50GE PAM4 signal, such each device signal bandwidth is constant, under same process conditions, it is possible to reduce half device, thus
It saves 2 hairs 2 and receives photoelectric chip；2 channel 50G PAM4 electric signals pass through light by laser and receiver photoelectricity/electro-optic conversion
Fibre is connected to or receives to end signal；Then in conjunction with WDM technologies, 2 tunnels are sent out or receipts are combined into one, finally use BIDI technology,
It can allow the layout for needing 8 optical fiber in the prior art under similarity condition, become only to need 1 optical fiber；Using light of the invention
Module can save resource.
Those of ordinary skill in the art will understand that the embodiments described herein, which is to help reader, understands this hair
Bright principle, it should be understood that protection scope of the present invention is not limited to such specific embodiments and embodiments.For ability
For the technical staff in domain, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made
Any modification, equivalent substitution, improvement and etc. should be included within scope of the presently claimed invention.
Claims (6)
1. a kind of novel single fiber bi-directional multichannel inputs optical module, which is characterized in that replace CDR using Gearbox chip, also wrap
Include: laser, PD detector, WDM multiplexer, demultiplexing optical device and transmitting-receiving BIDI module, specifically include transmit circuit with
Receive circuit；
The transmit circuit are as follows: two-way input electrical signal is multiplexed into electric signal all the way by Gearbox chip, Gearbox chip
The electric signal number of output is the half of input signal number, and Gearbox chip corresponds to a laser per output electric signal all the way,
The electric signal of output all the way of Gearbox chip is converted to optical signal by laser；If main line optical signal is combined by WDM multiplexer
It is transmitted after wdm optical signal through receiving and dispatching BIDI module all the way；
The reception circuit are as follows: through receiving and dispatching the received wdm optical signal of BIDI module, demultiplexed optical device is divided into corresponding number
Optical signal, the corresponding PD detector of optical signal all the way after demultiplexing, optical signal is converted to electric signal through PD detector, converts
Electric signal afterwards is converted by Gearbox chip, and the electric signal number of Gearbox chip output is input Gearbox core
Twice of piece electric signal number.
2. a kind of novel single fiber bi-directional multichannel according to claim 1 inputs optical module, which is characterized in that further include swashing
CD-ROM driver LDD, for the electric signal of the output of Gearbox chip to be loaded into laser.
3. a kind of novel single fiber bi-directional multichannel according to claim 2 inputs optical module, which is characterized in that further include
TIA circuit, for inputting Gearbox chip after amplifying to the electric signal after the conversion of PD detector.
4. a kind of novel single fiber bi-directional multichannel according to claim 3 inputs optical module, which is characterized in that the optical mode
Block is encapsulated using BOX or COB encapsulation.
5. a kind of novel single fiber bi-directional multichannel according to claim 3 inputs optical module, which is characterized in that the optical mode
Block is encapsulated using TO CAN pot type.
6. a kind of novel single fiber bi-directional multichannel according to claim 3 inputs optical module, which is characterized in that the optical mode
Block is combined using the cell type level Hermetic Package of one with the encapsulation of tradition TO CAN pot type.
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| CN112448786A (en) * | 2019-09-02 | 2021-03-05 | 武汉永鼎光通科技有限公司 | CWDM4 optical module for realizing 50G single-fiber bidirectional |
| CN112653490A (en) * | 2019-10-11 | 2021-04-13 | 默升科技集团有限公司 | Single ended signaling between differential Ethernet interfaces |
| CN113346954A (en) * | 2021-08-05 | 2021-09-03 | 深圳市迅特通信技术股份有限公司 | Local side equipment used in passive optical network with power of over 50G |
| CN113422941A (en) * | 2021-05-24 | 2021-09-21 | 江苏科大亨芯半导体技术有限公司 | HDMI data transmission and control system |
| CN113759473A (en) * | 2020-06-05 | 2021-12-07 | 华为技术有限公司 | Transmitting-receiving optical assembly, electronic equipment and optical communication system |
| CN114157360A (en) * | 2020-09-08 | 2022-03-08 | 佳必琪国际股份有限公司 | Optical module and signal processing method thereof |
| CN114647030A (en) * | 2022-05-19 | 2022-06-21 | 深圳市迅特通信技术股份有限公司 | Silicon-based photoelectronic receiving and transmitting integrated chip for PON OLT system |
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| CN116015470A (en) * | 2022-12-30 | 2023-04-25 | 深圳市光为光通信科技有限公司 | 400G optical communication module and signal optimization method |
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| CN113422941A (en) * | 2021-05-24 | 2021-09-21 | 江苏科大亨芯半导体技术有限公司 | HDMI data transmission and control system |
| WO2023284540A1 (en) * | 2021-07-15 | 2023-01-19 | 中兴通讯股份有限公司 | Single-fiber bidirectional optical module, high-baud-rate signal transmission method, and 5g fronthaul network |
| CN113346954A (en) * | 2021-08-05 | 2021-09-03 | 深圳市迅特通信技术股份有限公司 | Local side equipment used in passive optical network with power of over 50G |
| CN114647030A (en) * | 2022-05-19 | 2022-06-21 | 深圳市迅特通信技术股份有限公司 | Silicon-based photoelectronic receiving and transmitting integrated chip for PON OLT system |
| WO2023221457A1 (en) * | 2022-05-19 | 2023-11-23 | 深圳市迅特通信技术股份有限公司 | Silicon photonic transceiver integrated chip for pon olt system |
| CN116015470A (en) * | 2022-12-30 | 2023-04-25 | 深圳市光为光通信科技有限公司 | 400G optical communication module and signal optimization method |
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