CN105929494B - A kind of optical module - Google Patents

A kind of optical module Download PDF

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Publication number
CN105929494B
CN105929494B CN201610511007.9A CN201610511007A CN105929494B CN 105929494 B CN105929494 B CN 105929494B CN 201610511007 A CN201610511007 A CN 201610511007A CN 105929494 B CN105929494 B CN 105929494B
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CN
China
Prior art keywords
lens subassembly
electric signal
signal interface
flexible board
driving chip
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CN201610511007.9A
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Chinese (zh)
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CN105929494A (en
Inventor
徐海强
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Hisense Broadband Multimedia Technology Co Ltd
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Hisense Broadband Multimedia Technology Co Ltd
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Priority to CN201610511007.9A priority Critical patent/CN105929494B/en
Publication of CN105929494A publication Critical patent/CN105929494A/en
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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
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4249—Packages, e.g. shape, construction, internal or external details comprising arrays of active devices and fibres
    • 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
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4274—Electrical aspects
    • G02B6/4279—Radio frequency signal propagation aspects of the electrical connection, high frequency adaptations

Abstract

The invention discloses a kind of optical module, to solve PCB trace difficult problem in the prior art.The optical module of the present invention includes：Circuit board, lens subassembly, fiber adapter corresponding with lens subassembly；The driving chip of lens subassembly is connected with the electric signal interface of specified location area on circuit board, to reduce intersecting for the electric signal interface of specified location area and the communicating passage of driving chip；Wherein, the electric signal interface of specified location area is determined according to the type of each electric signal interface on the optical assembly type of driving chip driving, circuit board and arrangement；The bridle wire apparatus of lens subassembly is connected with fiber adapter by fibre ribbon, wherein, the channel sequence of fibre ribbon access bridle wire apparatus side is different from the channel sequence of fibre ribbon incoming fiber optic adapter side.The electric signal interface of specified location area is linked into driving chip by above-mentioned optical module so that PCB trace is without intersection or few intersection.

Description

A kind of optical module
Technical field
The present embodiments relate to technical field of photo communication more particularly to a kind of optical modules.
Background technology
In high-speed parallel optical module field, with the increase of light path, the raising of module integrated level and transmission rate are not Disconnected raising, especially 25Gbps rates Multipath parallel optical module, to pcb board material, differential signal track lengths, number of vias in module Etc. there is higher requirement.It is increasing to connect up difficulty, it is difficult to control optimum level.It is especially more in light path, such as 12/24/48 This high density high-speed parallel optical module of channel, it will usually the high-speed differential signal channel for having more IC parallel outputs enough, High-speed differential signal cabling on PCB can be extremely complex, wants to accomplish that cabling is most short, and no via/few via can be highly difficult.
In order to solve cabling difficulty, it will usually increase pcb board layer, increase via, increase the means such as complicated coiling.But this A little means can cause to connect up difficulty increase, PCB cost increases, especially when parallel channel is more, it may appear that PCB trace is multiple The designs such as miscellaneous, coiling, multiple vias, track lengths increase and via increase causes high-speed electrical signals that can not meet module performance, This is because track lengths increase, line loss is very big, causes electric signal of poor quality, and the electric signal eye pattern of module can be very Difference eventually leads to and there are problems that error code or under-sensitive in the signal transmission of optical module, influences the overall performance of optical module.
In addition, with the promotion of optical module complexity, the special-shaped PCB of some Rigid Flexs is also gradually applied to high-speed light Module field PCB trace difficulty bigger or even can not connect up in this case.
To sum up, optimize the cabling of optical module there is an urgent need for a kind of scheme in the prior art.
Invention content
The embodiment of the present invention provides a kind of optical module, to solve the cabling difficult problem on the circuit board of optical module, with Promote the transmission performance of optical module.
The embodiment of the present invention provides a kind of optical module, including：Circuit board, lens subassembly and with the lens subassembly pair The fiber adapter answered；
The driving chip of the lens subassembly is connected with the electric signal interface of specified location area on the circuit board, to subtract Few electric signal interface of the specified location area and intersecting for the communicating passage of the driving chip；Wherein, the specific bit The electric signal interface in region is put, is connect according to each electric signal on the optical assembly type of driving chip driving, the circuit board The type of mouth and arrangement determine；
The bridle wire apparatus of the lens subassembly is connected with the fiber adapter by fibre ribbon, wherein, the fibre ribbon The channel sequence of the bridle wire apparatus side is accessed, the channel sequence that the fiber adapter side is accessed from the fibre ribbon is different.
In optical module provided in an embodiment of the present invention, specified location area on the driving chip and circuit board of lens subassembly Electric signal interface connects, and the bridle wire apparatus of lens subassembly is connected with fiber adapter by fibre ribbon, in order to make electric signal interface With the communicating passage of driving chip without intersecting or intersecting less, the electric signal interface of driving chip is accessed in the embodiment of the present invention is The electric signal interface of specified location area, and the electric signal interface of specified location area is the optical assembly driven according to driving chip The type of each electric signal interface and arrangement determine in type, circuit board.And the telecommunications of driving chip is accessed in the prior art Number interface is determined according to the scheduled intelligent acess sequence in fiber adapter side.Due to the electric signal interface of specified location area The sequence for being linked into driving chip is consistent with the channel sequence of fibre ribbon access bridle wire apparatus side, and fibre ribbon incoming fiber optic is adapted to The channel sequence of device side is typically preset access sequence, and the optical fiber in fibre ribbon of the embodiment of the present invention can intersect, disorderly Fiber adapter is accessed after sequence so that it is suitable that the sequence of intelligent acess to fiber adapter side in fibre ribbon meets default access Sequence, therefore, compared with prior art, the channel sequence of fibre ribbon access bridle wire apparatus side in the embodiment of the present invention, with fibre ribbon The channel sequence of incoming fiber optic adapter side is different.What the optical fiber inside optical module transmitted is optical signal, and optical fiber arbitrarily intersects, both The transmission of optical signal is not interfered with, the performance of optical module will not be influenced.Therefore, the embodiment of the present invention is by specified location area Electric signal interface is linked into driving chip, ensures electric signal interface and the communicating passage of driving chip without intersecting or intersect less, It solving PCB trace difficult problem in the prior art, can reach PCB trace largest optimization, cabling is smooth, cabling is short, Coiling is few, reduces unnecessary via or without via, and then ensured the stability of optical module transmission performance.
Description of the drawings
Attached drawing is used to provide further understanding of the present invention, and a part for constitution instruction, is implemented with the present invention Example for explaining the present invention, is not construed as limiting the invention together.In the accompanying drawings：
Fig. 1 a to Fig. 1 e are the designing scheme of the multi-channel circuit plate cabling of optical module of the prior art；
Fig. 2 is a kind of structure diagram of optical module provided in an embodiment of the present invention；
Fig. 3 a to Fig. 5 are a kind of circuit board trace structure diagram of optical module provided in an embodiment of the present invention；
Fig. 6 is the structure diagram that a kind of fibre ribbon provided in an embodiment of the present invention intersects；
Fig. 7 a are the structure diagram that a kind of optical port of optical module provided in an embodiment of the present invention makes a reservation for access sequence；
Fig. 7 b are what a kind of electric signal pin of each electric signal interface of optical module provided in an embodiment of the present invention defined Schematic diagram；
Fig. 8 is a kind of circuit board trace structure diagram of optical module provided in an embodiment of the present invention；
Fig. 9 is the schematic diagram of practical cabling on a kind of circuit board of optical module provided in an embodiment of the present invention；
Figure 10 to Figure 12 is the bridle wire apparatus and optical fiber in a kind of lens subassembly of optical module provided in an embodiment of the present invention Connection relationship diagram between adapter；
Figure 13 is the corresponding bridle wire apparatus side of lens subassembly on a kind of first flexible board provided in an embodiment of the present invention The structure diagram of the channel sequence of fibre ribbon；
Figure 14 is the corresponding bridle wire apparatus side of lens subassembly on a kind of second flexible board provided in an embodiment of the present invention The structure diagram of the channel sequence of fibre ribbon；
Figure 15 is that the channel of the fibre ribbon of bridle wire apparatus side on a kind of first flexible board provided in an embodiment of the present invention intersects The structure diagram of the first fiber adapter is accessed afterwards；
Figure 16 is that the channel of the fibre ribbon of bridle wire apparatus side on a kind of second flexible board provided in an embodiment of the present invention intersects The structure diagram of the second fiber adapter is accessed afterwards
Figure 17 to Figure 20 is a kind of assembling schematic diagram of optical module provided in an embodiment of the present invention.
Specific embodiment
In order to make technical problem solved by the invention, technical solution and it is effective be more clearly understood, below in conjunction with Figure of description illustrates the preferred embodiment of the present invention, it should be understood that preferred embodiment described herein is only used for The description and interpretation present invention, is not intended to limit the present invention.And in the absence of conflict, the embodiment and reality in the application Applying the feature in example can be combined with each other.
The optical module design of optical module or channel for customization more (such as 12,24,48 channels), high-speed differential signal Connector, golden finger etc. determine the pin definitions for emitting electric signal and receiving electric signal on circuit board, fiber outlet channel Justice, is typically derived from customer demand or MSA regulations, and inside modules design can not change these external conditions.If go out in module Existing multiple chips parallel workings, export multigroup high-speed differential signal together, and the cabling on circuit board will appear difficulty.
As shown in Figure 1a, conventional wiring thinking is first by the optical port of fiber adapter side sequence, (fibre ribbon corresponding channel Access sequence, typically natural order), determine the channel sequence of the fibre ribbon of bridle wire apparatus side, the optical fiber in fibre ribbon without Intersect, therefore, the channel sequence of the fibre ribbon of bridle wire apparatus side is identical with the optical port sequence of fiber adapter side, further according to wire jumper The channel sequence of the fibre ribbon of device side determines the electric signal interface that driving chip corresponding with bridle wire apparatus should access, will Driving chip is connected with these electric signal interfaces by signal wire, such as differential signal line.Because each electric signal interface on PCB is Arrangement, and the no rule of arrangement of each electric signal interface, usually out of order arrangement are defined according to the pin of electric signal.This Sample, when the channel in optical module is more, when driving chip is more, the channel between each driving chip and each electric signal interface Will there are intersection, coiling or more vias.
Fig. 1 a only illustrate the corresponding bridle wire apparatus of part driving chip (chip 1 and chip 2) and fiber adapter side Connection, if being TX01-TX02-TX03-TX04 with the channel access of 1 corresponding fibre ribbon of chip sequence, then chip 1 accesses Electric signal interface sequence for TX01-TX02-TX03-TX04, be with the channel access sequence of 2 corresponding fibre ribbon of chip TX05-TX06-TX07-TX08, then the sequence for the electric signal interface that chip 2 accesses is TX05-TX06-TX07-TX08, usually electricity Arrangement on signaling interface TX01, TX02, TX03, TX04, TX05, TX06, TX07, TX08 plate is out of order, therefore in cabling It will necessarily the intersection of presence signal line or the coiling of signal wire.
It when number of chips is more, in face of cabling difficult problem, is typically designed in terms of PCB layout, optical fiber is not Adjustment sequence.Conventional cabling realizes wiring by the way of coiling, increase via, blind vein hole, HDI holes.But the increase of via It can lead to further problems, such as the problems such as transmission loss increases, and impedance continuity is deteriorated, the transmission of corresponding high speed signal influences very Greatly, particularly 25Gbps high speed signals.Can also suitably increase PCB trace layer, but increase routing layer, it is also necessary to using back drill, HDI folds the techniques such as hole to assist reducing the Insertion Loss of via and improve impedance continuity.
For example, a kind of realized using PCB trace layer is increased in the example of PCB layout, it is 10 layers that PCB trace layer, which increases, Wherein, the wiring layer of high-speed differential signal line is distributed in four layers, including top layer (referring to Fig. 1 b), the 2nd layer of (referring to Fig. 1 c), 7 Differential signal line in layer (referring to Fig. 1 d) and the bottom (referring to Fig. 1 e).These wiring layers need to be realized using 3 rank HDI holes, Folded hole production process is complicated, and folded hole quality is difficult to control, in short, the technique of layering is extremely complex, if channel and Driving chip continues to increase, and wiring difficulty will bigger.
In order to solve the optical module of multichannel in the prior art in PCB trace existing more coilings, intersecting cabling, more more Interference between electric signal caused by via etc., and then the problem of influence optical module transmission performance, the present inventor proposes one The kind PCB trace scheme opposite with conventional wires thinking of the prior art.
The present invention inventive concept be：For the circuit board wiring of high density Multipath parallel optical module, not from fiber adapters The optical port sequence of device side, determines the electric signal interface that driving chip side joint enters, but in turn, according to electric signal interface substantially Distributed areas, first determine which region electric signal interface connected with the driving chip of which position, can reach cabling it is shorter, Without intersecting or intersecting less, then, according to electric signal interface region corresponding with driving chip, the telecommunications of access driving chip is determined The channel sequence of number interface accesses the channel sequence of the electric signal interface of driving chip, bridle wire apparatus side corresponding with driving chip The channel sequence of fibre ribbon is consistent, because the channel access sequence of fiber adapter optical fiber band is changeless, and accesses The electric signal interface of driving chip is the electric signal interface of specified location area, so the channel sequence of bridle wire apparatus optical fiber band Can be variant with the channel access of the fibre ribbon of fiber adapter side sequence, the solution of the present invention is by by bridle wire apparatus optical fiber The channel (i.e. optical fiber) of band intersected, it is out of order after incoming fiber optic adapter side again, you can meet fiber adapter optical fiber band Channel sequence and the channel access of scheduled fiber adapter optical fiber band sequence match.Optical fiber in the embodiment of the present invention is fitted Orchestration can also replace with optical fiber connector or optical port connector.
To be conceived based on foregoing invention, the embodiment of the present invention provides a kind of optical module as shown in Figure 2, including：Circuit board, thoroughly Mirror assembly and fiber adapter corresponding with lens subassembly；Include driving chip and bridle wire apparatus in lens subassembly；Lens group Driving chip in part is connected with the electric signal interface of specified location area on circuit board, to reduce the electricity of specified location area Signaling interface intersects with the communicating passage of driving chip；The bridle wire apparatus of lens subassembly is connected with fiber adapter by fibre ribbon It is logical, wherein, the fibre ribbon accesses the channel sequence of the bridle wire apparatus side, and the fiber adapter is accessed with the fibre ribbon The channel sequence of side is different, that is, after accessing the optical fiber intersection in the fibre ribbon of bridle wire apparatus side, incoming fiber optic adapter side so that The channel sequence of the fibre ribbon of incoming fiber optic adapter side meets the pre- routing access sequence of fine adapter side.
As shown in Fig. 2, the type of the electric signal interface on circuit board, including transmitting electric signal interface TX (1~n) and receives Electric signal interface RX (1~n), usual transmitting electric signal interface correspond to a transmission channel on fibre ribbon, a reception Electric signal interface corresponds to a receiving channel on fibre ribbon, the transmission channel of optical module and the quantity phase of receiving channel Together, for example, optical module is 48 channels, then including 24 transmission channels and 24 receiving channels, on circuit board with emit it is logical The corresponding electric signal interface of road, receiving channel is 48 altogether.The position of usual each electric signal interface on circuit boards is fixed not Become, and electric signal pipe as defined in each transmitting electric signal and each reception electric signal position on circuit boards and client Foot definition is consistent, and therefore, the position of each electric signal interface on circuit boards can not be changed.
In the embodiment of the present invention, the electric signal interface of specified location area corresponding with driving chip is according to driving core The optical assembly type of piece driving, the type of each electric signal interface and arrangement determine on circuit board, it is therefore an objective to connect electric signal Mouthful with the communicating passage of driving chip without intersecting or intersect less.That is, multiple driving chips are specified with multiple on circuit board There are one-to-one relationship, each driving chips to be corresponding with the telecommunications of specified location area for the electric signal interface of the band of position Number interface, and the electric signal interface of the specified location area corresponding to each driving chip is unique.
In the embodiment of the present invention, the communicating passage between electric signal interface and driving chip can be high-speed differential signal Line, the electric signal interface on circuit board are Difference signal pair, and the transmitting electric signal interface if number is 1 is Difference signal pair (TX01_P, TX01_N).
For a driving chip, the electric signal interface of access has logical order, accesses the electric signal of driving chip The sequence of interface, it is consistent with the channel sequence from bridle wire apparatus incoming fiber optic band.In Fig. 2, the electric signal for being linked into chip 1 connects Mouthful, there are one-to-one relationships with the channel from 1 corresponding fibre ribbon of bridle wire apparatus access chip, are linked into the telecommunications of chip 2 Number interface, there are one-to-one relationships with the channel from 2 corresponding fibre ribbon of bridle wire apparatus access chip.
For example, on 1 corresponding circuit board of driving chip specified location area transmitting electric signal interface, including (TX04_P, TX04_N), (TX11_P, TX11_N), (TX06_P, TX06_N), (TX01_P, TX01_N), and access the electricity of driving chip 1 The sequence of signaling interface is TX04-TX11-TX06-TX01, then accesses four group electricity of the driving chip 1 by access sequence parallel output This four groups of electric signals are converted into four groups of optical signals by signal, driving light emission component, and 1 corresponding bridle wire apparatus of driving chip is by four Group optical signal, which is imported into fibre ribbon, to be transmitted, and the optical fiber for accessing bridle wire apparatus carries biography of 4 light cores as this four groups of optical signals Defeated channel.Because being linked into the electric signal interface of driving chip, exist with the channel from bridle wire apparatus incoming fiber optic band and correspond Relationship, the sequence for accessing the electric signal interface of driving chip 1 are TX04-TX11-TX06-TX01, therefore, are accessed from bridle wire apparatus The sequence of this four optical channels of fibre ribbon is also TX04-TX11-TX06-TX01.
But the predetermined access sequence that fibre ribbon is linked at fiber adapter optical port is pre-specified, it is impossible to Meaning changes.In order to make from fibre ribbon be linked into fiber adapter channel sequence and the predetermined access at fiber adapter optical port it is suitable Sequence is consistent, and the optical-fibre channel of fibre ribbon is carried out cross processing, i.e., by the channel (optical fiber) of fibre ribbon access bridle wire apparatus side, is handed over Fiber adapter side is accessed after fork so that the channel sequence of fibre ribbon incoming fiber optic adapter side meets predetermined access sequence.Example Such as, the channel sequence of fibre ribbon access bridle wire apparatus side is：TX04-TX11-TX06-TX01, incoming fiber optic after fibre ribbon intersects The channel sequence of adapter side is TX01-TX04-TX06-TX11, and the schematic diagram that optical fiber intersects can be found in Fig. 6.According to the present invention The fibre ribbon cross processing mode of embodiment, the channel sequence of fibre ribbon access bridle wire apparatus side, is fitted with fibre ribbon incoming fiber optic The channel sequence of orchestration side is different.
The optical module of the embodiment of the present invention is the optical module of multichannel, the lens subassembly in above-mentioned optical module be it is multiple, often It can include one or more driving chips in a lens subassembly, each driving chip corresponds to an optical fiber of bridle wire apparatus side Band.
Further, in order to facilitate the wiring between each electric signal interface on multiple driving chips and circuit board, optical module Interior multiple lens subassemblies can be arranged on flexible board, and flexible board is connect by electric connector with circuit board；On flexible board After electric signal interface on driving chip and circuit board in multiple lens subassemblies completes wiring, flexible board is stacked with circuit board, And then the bridle wire apparatus of each lens subassembly is assembled by a plurality of fibre ribbon and fiber adapter.
Further, in order to reduce the length of the communicating passage of the electric signal interface of driving chip and specified location area, In the embodiment of the present invention, position of the driving chip on flexible board, the electricity of close specified location area corresponding with driving chip View field of the signaling interface on flexible board.That is, before flexible board and circuit board are stacked, driving chip is with specifying The electric signal interface of the band of position corresponds to, and the position of driving chip, is set nearby with the electric signal interface of specified location area It puts.Therefore, the electric signal interface of specified location area corresponding with driving chip, the also position with driving chip on flexible board It is related.
In the embodiment of the present invention, the optical assembly type of driving chip driving is right including light emission component and light-receiving component Lens subassembly in the embodiment of the present invention according to the optical assembly type that internal driving chip drives, can be divided into the first kind Lens subassembly, the second class lens subassembly and third class lens subassembly, wherein, first kind lens subassembly only includes that light is driven to send out Penetrate the driving chip of component；Second class lens subassembly had not only included the driving chip for driving light emission component, but also including being used for Drive the driving chip of light-receiving component；Third class lens subassembly only includes the driving chip for driving light-receiving component.
In the embodiment of the present invention, multiple lens subassemblies on any flexible board are saturating including first kind lens subassembly, the second class Mirror assembly and the part in third class lens subassembly or combination.If that is, the lens subassembly on a flexible board corresponds to Fiber adapter optical port for transmitting-receiving optical port, then multiple lens subassemblies on a flexible board, can include first kind lens Component and third class lens subassembly can include first kind lens subassembly and the second class lens subassembly, and it is saturating can to include the second class It is saturating can also to include first kind lens subassembly, the second class lens subassembly and third class simultaneously for mirror assembly and third class lens subassembly Mirror assembly.
Illustrate below in conjunction with the accompanying drawings, it is each in optical assembly type that the embodiment of the present invention drives according to driving chip, circuit board The type of a electric signal interface and arrangement determine the tool of the correspondence of driving chip and the electric signal interface of specified location area Body mode.
First, according to the type of electric signal interface each on circuit board and arrangement, to the electric signal interface area on circuit board Domain is divided.
Electric signal interface on circuit board including transmitting electric signal interface and receives electric signal interface；Transmitting electric signal connects The distributed areas of mouth on circuit boards are emitting area, and it is reception area to receive the distributed areas of electric signal interface on circuit boards Domain, the type of each electric signal interface and arrangement, each electric signal interface that can refer to shown in attached drawing 7b are corresponding on circuit board The structure diagram that electric signal pin defines.
As shown in Figure 3a, after the electric signal interface region division on circuit board, emitting area TX includes：Close to receiving area First position region and far from receiving area second position region；Receiving area RX includes：Close to the third of emitting area The band of position and the 4th band of position far from emitting area.
Secondly, according to the division in the electric signal interface region on circuit board, determine lens subassembly on flexible board substantially Position.
Because of multiple lens subassemblies on any flexible board, including first kind lens subassembly, the second class lens subassembly and third Part or combination in class lens subassembly.It can determine that each lens subassembly connects with the electric signal on circuit board according to the following conditions The relative position relation of each region of mouth.
If optical module includes multiple first kind lens subassemblies, multiple first kind lens subassemblies are distributed in first position nearby The both sides in region；As shown in Figure 3a, lens subassembly A1 including driving chip 3 and driving chip 4 and including 9 He of driving chip The lens subassembly A2 of driving chip 10 is first kind lens subassembly, and the quantity of first kind lens subassembly is 2,2 first kind Lens subassembly is distributed in the both sides in first position region nearby so that driving chip 3,4 and lens subassembly in lens subassembly A1 Driving chip 9,10 in A2 connects respectively with the electric signal interface in the region of first position.
If optical module includes multiple second class lens subassemblies, multiple second class lens subassemblies are distributed in the second position nearby Region and the both sides in the third place region, as shown in Figure 3a, lens subassembly B1 and packet including driving chip 1 and driving chip 2 The lens subassembly B2 for including driving chip 7 and driving chip 8 is first kind lens subassembly, and the quantity of the second class lens subassembly is 2 A, 2 the second class lens subassemblies are distributed in the both sides in second position region and the third place region so that driving chip 1 and drive Dynamic chip 7 is connected with the electric signal interface in the region of the second position, in driving chip 2 and driving chip 8 and the third place region Electric signal interface connection.
If optical module includes multiple third class lens subassemblies, multiple third class lens subassemblies are distributed in the 4th position nearby The both sides in region.As shown in Figure 3a, lens subassembly C1 including driving chip 5 and driving chip 6 and including 11 He of driving chip The lens subassembly C2 of driving chip 12 is third class lens subassembly, and the quantity of third class lens subassembly is 2,2 third classes Lens subassembly is distributed in the both sides of the 4th band of position nearby so that driving chip 5,6,11,12 respectively with first position region Interior electric signal interface connection.
Physical location of each lens subassembly on flexible board, can be based on above-mentioned each lens subassembly and circuit board The relative position relation of each region of electric signal interface determines.It specifically, can be according to the electric signal interface on circuit board Projected position of each region on flexible board, to determine position of each lens subassembly on flexible board.
If optical module include multiple first kind lens subassemblies, position of multiple first kind lens subassemblies on flexible board, It is distributed in the both sides of projected position of the first position region on flexible board nearby；If optical module includes multiple second class lens groups Part, then position of multiple second class lens subassemblies on flexible board, is distributed in second position region and the third place region nearby The both sides of projected position on flexible board, if optical module includes multiple third class lens subassemblies, multiple third class lens groups Position of the part on flexible board is distributed in the both sides of projected position of the 4th band of position on flexible board nearby.
The projection position of first position region, second position region, the third place region, the 4th band of position on flexible board It puts, referring to the dashed region of Fig. 3 b.In Fig. 3 b, the first kind lens subassembly A1 and A2 are arranged on first position region on flexible board Projected position both sides, the second class lens subassembly B1 and B2 be arranged on, and second position region and the third place region are in flexibility The both sides of projected position on plate, wherein, driving chip 1 and driving chip 7 are corresponding with second position region, 1 He of driving chip Driving chip 7 is distributed in the both sides of projected position of the second position region on flexible board, driving chip 2 and driving chip 8 with The third place region corresponds to, and driving chip 2 and driving chip 8 are distributed in projected position of the third place region on flexible board Both sides.Third class lens subassembly C1 and C2 are arranged on the both sides of projected position of the 4th band of position on flexible board.
Finally, the position based on lens subassembly on flexible board determines the driving chip in lens subassembly and designated position The correspondence in region.
It is for the driving chip in any lens subassembly on flexible board and the correspondence of specified location area：
If a lens subassembly is first kind lens subassembly, the driving chip in lens subassembly, in the region of first position Transmitting electric signal interface close to the lens subassembly side connects；
If a lens subassembly is the second class lens subassembly, it is used to drive the driving core of light emission component in the lens subassembly Piece is connected with the transmitting electric signal interface close to lens subassembly side in the region of the second position；It is used to drive in the lens subassembly The driving chip of light-receiving component is connected with the reception electric signal interface close to lens subassembly side in the third place region；
If a lens subassembly is third class lens subassembly, the driving chip in the lens subassembly, with the 4th band of position The reception electric signal interface connection of interior close lens subassembly side.
For example, as best shown in figures 3 a and 3b, close to lens subassembly in driving chip 3 and driving chip 4, with first position region The transmitting electric signal interface connection of A1 sides；Driving chip 9 and driving chip 10 and lens subassembly close in the region of first position The transmitting electric signal interface connection of A2 sides.Driving chip 1 and the transmitting close to lens subassembly B1 sides in the region of the second position Electric signal interface connects；Driving chip 2 in the third place region close to the reception electric signal interface of lens subassembly B1 sides with connecting It is logical；Driving chip 7 is connected with the transmitting electric signal interface close to lens subassembly B2 sides in the region of the second position, driving chip 8 It is connected with the reception electric signal interface close to lens subassembly B2 sides in the third place region.Driving chip 5 and driving chip 6, It is connected with the reception electric signal interface close to lens subassembly C1 sides in the 4th band of position；Driving chip 11 and driving chip 12 It is connected with the reception electric signal interface close to lens subassembly C2 sides in the 4th band of position.
Above-mentioned relative position based on the driving chip in lens subassembly and lens subassembly and electric signal interface region is closed System, the structure of the optical module of the embodiment of the present invention can include following several：
In the first structure, whole lens subassemblies of optical module are all distributed on a flexible board, lens subassembly and telecommunications The relative position relation of number interface area is similar to Fig. 3 b.In this configuration, optical module includes the first fiber adapter and second Fiber adapter, the quantity of lens subassembly corresponding with the first fiber adapter are corresponding equal to the second fiber adapter The quantity of mirror assembly；Wherein, lens subassembly corresponding with the first fiber adapter is distributed in each electric signal interface in flexible board On view field side；Lens subassembly corresponding with the second fiber adapter is distributed in each electric signal interface in flexibility The opposite side of view field on plate.According to the structure shown in Fig. 3 b, lens subassembly A1, lens subassembly B1, lens subassembly C1 is equal Corresponding with the first fiber adapter, lens subassembly A2, lens subassembly B2, lens subassembly C2 is corresponding with the second fiber adapter. Driving chip 1,3,4 for driving light emission component, driving chip 2,5,6 for driving light-receiving component, driving chip 7,9, 10 for driving light emission component, and driving chip 8,11,12 is for driving light-receiving component, if the electricity of each driving chip access Signaling interface quantity is identical, then accesses transmission channel, the receiving channel quantity of the first fiber adapter, is fitted with the second optical fiber of access The transmission channel of orchestration, receiving channel quantity are equal.
In second of structure, whole lens subassemblies of optical module are all distributed on 2 flexible boards, including the first flexible board and Second flexible board, lens subassembly and the relative position relation in electric signal interface region on two flexible boards, as shown in Figure 4. In this structure, the first flexible board and the second flexible board are connected to circuit board both sides；Optical module further includes the first optical fiber and fits Orchestration and the second fiber adapter, the lens subassembly on the first flexible board is corresponding with the first fiber adapter, on the second flexible board Lens subassembly it is corresponding with the second fiber adapter；Wherein, the quantity of the lens subassembly on the first flexible board, equal to the second flexibility The quantity of lens subassembly on plate.
In optical module structure as shown in Figure 4, lens subassembly A1 and lens subassembly A2 are first kind lens subassembly, lens group Part B1 and lens subassembly B2 is the second class lens subassembly, and lens subassembly C1 and lens subassembly C2 are third class lens subassembly.Lens Component and the relative position relation in electric signal interface region are：Lens subassembly A1 and lens subassembly A2 are arranged on first position region Both sides, lens subassembly B1 and lens subassembly B2 are located at the both sides in second position region and the third place region, lens subassembly C1 It is located at the both sides of the 4th band of position with lens subassembly C2.
In optical module structure as shown in Figure 4, the lens subassembly A1 on the first flexible board, lens subassembly B1, lens Component C1 is corresponding with the first fiber adapter, the lens subassembly A2 on the second flexible board, lens subassembly B2, lens subassembly C2 is corresponding with the second fiber adapter.For driving light emission component, driving chip 4,5,6 is used to drive driving chip 1,2,3 Dynamic light-receiving component, for driving light emission component, driving chip 10,11,12 is used to drive light-receiving group driving chip 7,8,9 Part if the electric signal interface quantity of each driving chip access is identical, accesses the transmission channel of the first fiber adapter, receives Number of channels is equal with transmission channel, the receiving channel quantity for accessing the second fiber adapter.
In optical module structure as shown in Figure 4, the driving chip pass corresponding with electric signal interface region in lens subassembly It is to be：Close to the transmitting electric signal interface of lens subassembly A1 sides in driving chip 1 and driving chip 2, with first position region Connection；Driving chip 7 and driving chip 8 in the region of first position close to the transmitting electric signal interface of lens subassembly A2 sides with connecting It is logical.Driving chip 3 is connected with the transmitting electric signal interface close to lens subassembly B1 sides in the region of the second position；Driving chip 4 It is connected with the reception electric signal interface close to lens subassembly B1 sides in the third place region；Driving chip 9 and second position area It is connected in domain close to the transmitting electric signal interface of lens subassembly B2 sides, driving chip 10 and lens close in the third place region The reception electric signal interface connection of component B2 sides.Close to lens in driving chip 5 and driving chip 6, with the 4th band of position The reception electric signal interface connection of component C1 sides；Close to lens in 12 and the 4th band of position of driving chip 11 and driving chip The reception electric signal interface connection of component C2 sides.
For the structure of above-mentioned second of optical module, the first flexible board and the second flexible board are stacked on circuit boards, the The arrangement relationship of the lens subassembly on lens subassembly, the second flexible board on circuit boards on one flexible board, including：First is flexible Lens subassembly on plate and the second flexible board is arranged in the front of circuit board.
The third optical module structure, as shown in figure 5, flexible board 1 and flexible board 2 are connected to circuit board both sides, lens Component A1 and lens subassembly A2 is first kind lens subassembly, and lens subassembly B1 and lens subassembly B2 are the second class lens subassembly, thoroughly Mirror assembly C1 and lens subassembly C2 is third class lens subassembly.Lens subassembly A1 on the first flexible board, lens subassembly B1, Lens subassembly C1 is corresponding with the first fiber adapter, the lens subassembly A2 on the second flexible board, lens subassembly B2, lens Component C2 is corresponding with the second fiber adapter.
Wherein, in optical module structure as shown in Figure 5, the lens group on lens subassembly and flexible board 2 on flexible board 1 Driving chip and electric signal interface area in part, with the correspondence and lens subassembly of circuit board power on signal interface area The correspondence in domain, it is identical with optical module structure shown in Fig. 4, it is not repeated herein.
The third optical module structure is compared with second of optical module structure, and the position of lens subassembly B1 and lens subassembly B2 are not Together.Flexible board 1, flexible board 2 are stacked with circuit board to be two-sided stacked, and flexible board is curved when the arrow direction in Fig. 5 is stacked Direction is rolled over, i.e., in flexible board 1 and stacked circuit board, lens subassembly A1, lens subassembly C1 are stacked in the front of circuit board, lens Component B1 is stacked in the back side of circuit board；In flexible board 2 and stacked circuit board, lens subassembly A2, lens subassembly C2 are stacked in The front of circuit board, lens subassembly B2 are stacked in the back side of circuit board.
In order to make to have on flexible board sufficient spatial arrangement driving chip, for the structure of the third above-mentioned optical module, the One flexible board and the second flexible board are stacked on circuit boards, saturating on the lens subassembly, the second flexible board on the first flexible board The arrangement relationship of mirror assembly on circuit boards, including：
In lens subassembly on first flexible board and the second flexible board, first kind lens subassembly and third class lens subassembly row Cloth is arranged in back of circuit board in circuit board front, the second class lens subassembly；Alternatively, on the first flexible board and the second flexible board In lens subassembly, first kind lens subassembly and third class lens subassembly are arranged in back of circuit board, the arrangement of the second class lens subassembly In circuit board front.First flexible board and the second flexible board are stacked and placed on the structure before circuit board, reference can be made to Figure 17；First is flexible Plate and the second flexible board are stacked and placed on the structure after circuit board and can be found in Figure 18.
The above-mentioned optical module cabling scheme of the embodiment of the present invention, (transmitting electric signal connects each electric signal interface on circuit board Mouthful and receive electric signal interface) can be replaced other kinds of optical module electric signal connector, including but unlimited golden finger, BGA/ Lga connector, Interposer connectors etc..
The above-mentioned optical module cabling scheme of the embodiment of the present invention, suitable for optical module/AOC with tail optical fiber, also applicable mould The scene that block internal optical fiber can intersect.
The above-mentioned optical module cabling scheme of the embodiment of the present invention, golden finger/connector and light especially suitable for optical module There is one-to-many scene in the driving chip of inside modules, i.e., the optical module of multichannel, optical mode are realized by multiple driving chips Block carries out high-speed differential signal line by golden finger, BGA/LGA connectors, Interposer connectors etc. with driving chip Connection occurs 1 in golden finger/connector and optical module internal drive chip：During more than 2 ratio, such as an optical module has There are 12 driving chips in one BGA connector, inside, and the internal structure of such optical module all may result in the height on PCB Speed difference sub-signal cabling difficulty rise, cost increase in addition can not connect up, signal quality is unsatisfactory for requiring.By of the invention real The above-mentioned optical module cabling scheme of example is applied, PCB trace difficulty in multichannel optical module can be effectively reduced, reduce cost.
The above-mentioned optical module cabling scheme of the embodiment of the present invention, suitable for a fairly large number of optical module of module channels, such as 12 The optical module of channel, 24 channels, 48 channels or more channel.
Intersect to meet optical fiber, the above-mentioned optical module cabling scheme of the embodiment of the present invention needs the optical fiber in optical module Space with intersection.
The above-mentioned optical module cabling scheme of the embodiment of the present invention by intersecting optical fiber, ensures PCB trace without intersection or few friendship Fork reduces number of vias, and then improves the quality of optical module circuit board power on signal, and optical module is made to meet 25Gbps or higher speed The demand on signal quality of rate.The above-mentioned optical module cabling scheme of the embodiment of the present invention, especially to 25Gbps or higher signal rate The optical module of signal has preferably effect of optimization.
The embodiment of the present invention combines a kind of optical module of 48 channel below, to the circuit board trace mode of the embodiment of the present invention It illustrates.
Such as 48 channel complexity light engines of a customization are designed, the appearance and size of the optical module of 48 channels, Emit electric signal interface and receive the arrangement of electric signal interface and the channel access sequence of fiber adapter side, carried by client The preceding optical module shape customized, optical module electric connector signal (i.e. the arrangement requirement of electric signal interface), optical module optical port phase Specification (the channel access sequence of fiber adapter side) is closed to determine.
Fig. 7 a are that the optical module of 48 channels makes a reservation for access sequence in fiber adapter wing passage, and MPO-1 is that the first optical fiber is fitted Sequentially, the channel at the optical port of the first fiber adapter includes 12 transmission channels and 12 for channel access at the optical port of orchestration Receiving channel；Wherein, the predetermined access sequence of 12 transmission channels is TX01~TX12；The predetermined access of 12 receiving channels is suitable Sequence is RX01 to RX12.MPO-2 be at the optical port of the second fiber adapter channel access sequence, the light of the second fiber adapter Channel at mouthful also includes 12 transmission channels and 12 receiving channels；Wherein, the predetermined access sequence of 12 transmission channels is TX13~TX24；The predetermined access sequence of 12 receiving channels is RX13 to RX24.
Fig. 7 b are the pin definition and 24 of the corresponding 24 transmittings electric signal of 24 transmission channels of the optical module of 48 channels The pin definition of the corresponding 24 receptions electric signal of a receiving channel, the pins definition of 24 transmitting electric signals and 24 receive electricity The pin definition of signal, for defining 24 transmitting electric signal interfaces, the arrangement of 24 reception electric signal interfaces on circuit boards Position.By Fig. 7 b it is found that transmitting electric signal interface is different with the layout area of electric signal interface on circuit boards is received.
Inventive concept based on the embodiment of the present invention, the groups such as the lens subassembly inside optical module, the chip in lens subassembly The arrangement of part and cabling, including the following contents：
First, the optical module of 48 channels includes a circuit board, 48 electric signal interfaces on circuit board are according to Fig. 7 b institutes The pin definition shown is arranged, and the region where emitting electric signal interface specifically may be used with the region where receiving electric signal interface Referring to Fig. 9.
Second, the optical module of 48 channels includes 6 lens subassemblies, as shown in figure 8, respectively the first lens subassembly 100, the Two lens subassemblies 200, third lens subassembly 300, the 4th lens subassembly 400, the 5th lens subassembly 500 and the 6th lens subassembly 600, wherein, the first lens subassembly 100, the second lens subassembly 200, third lens subassembly 300 are arranged on the first flexible board, the Four lens subassemblies 400, the 5th lens subassembly 500 and the 6th lens subassembly 600 are arranged on the second flexible board.
Wherein, lens subassembly and the relative position relation in electric signal interface region are：
Electric signal pin definition according to Fig. 7 b, 24 transmitting electric signal interface regions include first position region and Second position region, 24 receive electric signal interface region and include the third place region and the 4th band of position.First lens group 100 and the 4th lens subassembly 400 of part is first kind lens subassembly, and the first lens subassembly 100 and the 4th lens subassembly 400 about The first position region of transmitting electric signal interface TX is symmetrical arranged；Second lens subassembly 200 and the 5th lens subassembly 500 are second Class lens subassembly, and the second position region about TX is symmetrical arranged with receiving the third place region of electric signal interface RX；The Three lens subassemblies 300 and the 6th lens subassembly 600 are third class lens subassembly, and be symmetrical arranged about the 4th bands of position of RX.
The optical module of 48 channels includes the first fiber adapter and the second fiber adapter, the lens group on the first flexible board Part is corresponding with the first fiber adapter；Lens subassembly on second flexible board is corresponding with the second fiber adapter.
Optical port sequence with reference to 12 transmission channels of the first fiber adapter side is logical for TX01~TX12 and 12 reception The predetermined access sequence in road is RX01 to RX12；12 transmission channels of the second fiber adapter side optical port sequence for TX13~ The predetermined access sequence of TX24 and 12 receiving channel is RX13 to RX24, in lens subassembly corresponding with the first fiber adapter The corresponding electric signal interface of driving chip channel number within the scope of TX01~TX12 and RX01 to RX12, with the second optical fiber The channel number of the corresponding electric signal interface of driving chip in the corresponding lens subassembly of adapter in TX13~TX24 and RX13 extremely Within the scope of RX24.
For simplicity, Difference signal pair (TX01_P, TX01_N) is reduced to transmitting electric signal interface TX01, other The Difference signal pair of electric signal interface also simplifies in this manner.
Therefore, the driving chip in lens subassembly and the correspondence in electric signal interface region are：
First position region includes 16 transmitting electric signal interfaces, the driving chip 1 of the first lens subassembly 100 and driving core Piece 2 is connected with 8 transmitting electric signal interfaces close to the first flexible board in the region of first position；
For example, driving chip 1 is connected with transmitting electric signal interface TX09, TX12, TX8, TX10, driving chip 2 and transmitting Electric signal interface TX07, TX03, TX02, TX05 are connected.Driving chip 7 and driving chip 8 in 4th lens subassembly 400, with Close to 8 transmitting electric signal interface connections of the second flexible board in the region of first position；Driving chip 7 and transmitting electric signal interface TX17, TX15, TX13, TX18 are connected, and driving chip 8 is connected with transmitting electric signal interface TX20, TX16, TX22, TX23.
Second position region includes 8 transmitting electric signal interfaces, and the third place region includes 8 reception electric signal interfaces, A driving chip 3 in second lens subassembly 200, with 4 transmitting telecommunications close to the first flexible board in the region of the second position Number orifice, a driving chip 9 in the 5th lens subassembly 500, in the region of the second position close to the 4 of the second flexible board A transmitting electric signal interface connection；It is close in another driving chip 4, with the third place region in second lens subassembly 200 4 of first flexible board receive electric signal interface connection；Another driving chip 10 of 5th lens subassembly 500, with third position It puts in region and receives electric signal interface connection close to 4 of the second flexible board；
For example, driving chip 3 is connected with transmitting electric signal interface TX04, TX11, TX06, TX01, driving chip 9 and transmitting Electric signal interface TX24, TX14, TX19, TX21 are connected, driving chip 4 with receive electric signal interface RX04, RX01, RX03, RX02 is connected, and driving chip 10 is connected with receiving electric signal interface RX22, RX24, RX23, RX21.
4th band of position includes 16 reception electric signal interfaces, then two driving chips 5 in third lens subassembly 300 With driving chip 6, connected with 8 reception electric signal interfaces close to the first flexible board in the 4th band of position；6th lens group Close to 8 reception electric signals of the second flexible board in driving chip 11 and driving chip 12, with the 4th band of position in part 600 Orifice.
For example, driving chip 5 is connected with receiving electric signal interface RX11, RX12, RX09, RX07, driving chip 6 is with receiving Electric signal interface RX10, RX08, RX06, RX05 are connected, driving chip 11 with receive electric signal interface RX20, RX15, RX19, RX17 is connected, and driving chip 12 is connected with receiving electric signal interface RX16, RX18, RX13, RX14.
The circuit board trace schematic diagram that above-mentioned connected relation is presented is with reference to Fig. 9, according to Fig. 9 as can be seen that connection electric signal Smooth, the no intersection of cabling (differential signal line is illustrated that in Fig. 9) arrangement between interface and each chip, and cabling is shorter. Cabling distribution on circuit board and flexible board is at most distributed on two faces of circuit board.
The connection relation of lens subassembly and the first fiber adapter on first flexible board, referring to Figure 10, specially：
The first bridle wire apparatus Jumper of setting B in first lens subassembly 100, the 200 interior setting second of the second lens subassembly are jumped Line apparatus Jumper A, the interior setting third bridle wire apparatus Jumper C of third lens subassembly 300；First on first flexible board jumps Line apparatus Jumper B, the second bridle wire apparatus Jumper A and third bridle wire apparatus Jumper C are accessed by two fibre ribbons First fiber adapter 700.Wherein, the first bridle wire apparatus Jumper B, the second bridle wire apparatus Jumper A and are respectively connected to The channel of the fibre ribbon of three bridle wire apparatus Jumper C sides accesses 700 side of the first fiber adapter after intersection so that connects respectively Enter the first bridle wire apparatus Jumper B, the second bridle wire apparatus Jumper A and the fibre ribbon of third bridle wire apparatus Jumper C sides Channel sequence, it is different from the channel sequence of the fibre ribbon of 700 side of the first fiber adapter of access.
The connection relation of lens subassembly and the second fiber adapter on second flexible board, referring to Figure 11, specially：
Setting the forth jump line apparatus Jumper B in 4th lens subassembly 400, the 500 interior setting the fifth jump of the 5th lens subassembly Line apparatus Jumper A, 600 the 6th bridle wire apparatus Jumper C of interior setting of the 6th lens subassembly；The forth jump on second flexible board Line apparatus Jumper B, the fifth jump line apparatus Jumper A and the 6th bridle wire apparatus Jumper C are accessed by two articles of fibre ribbons Second fiber adapter 800.Wherein, the forth jump line apparatus Jumper B, the fifth jump line apparatus Jumper A and are respectively connected to The channel of the fibre ribbon of six bridle wire apparatus Jumper C sides accesses 800 side of the second fiber adapter after intersection so that connects respectively Enter the forth jump line apparatus Jumper B, the fifth jump line apparatus Jumper A and the fibre ribbon of the 6th bridle wire apparatus Jumper C sides Channel sequence, it is different from the channel sequence of the fibre ribbon of 800 side of the second fiber adapter of access.
First bridle wire apparatus Jumper B, the second bridle wire apparatus Jumper A and third bridle wire apparatus Jumper C accesses the The schematic diagram of one fiber adapter, as shown in figure 12.
Because the electric signal interface in specified location area is accessed corresponding driving chip by the embodiment of the present invention, therefore, connect The channel number for entering the electric signal interface of each driving chip is out of order, therefore, corresponds to the channel of the fibre ribbon of bridle wire apparatus side Sequence is also out of order.First lens subassembly 100, the second lens subassembly 200,300 corresponding bridle wire apparatus of third lens subassembly The channel sequence of the fibre ribbon of side is referring to Figure 13, the 4th lens subassembly 400, the 5th lens subassembly 500 and the 6th lens subassembly 600 The channel sequence of the fibre ribbon of corresponding bridle wire apparatus side referring to Figure 14, wherein, the different channels shown in Figure 13 and Figure 14 Number corresponding optical fiber color is different.
It is filled with the first lens subassembly 100, the second lens subassembly 200,300 corresponding first wire jumper of third lens subassembly The channel sequence of the fibre ribbon of Jumper B, the second bridle wire apparatus Jumper A and third bridle wire apparatus Jumper C is put with reference to figure 13。
Because the electric signal interface of the driving chip 1 in the first lens subassembly 100 of access is：TX09、TX12、TX8、TX10； The electric signal interface of the driving chip 2 accessed in the first lens subassembly 100 is：TX07、TX03、TX02、TX05；Access second is thoroughly The electric signal interface of driving chip 3 in mirror assembly 200 is：TX04、TX11、TX06、TX01；Access the second lens subassembly 200 The electric signal interface of interior driving chip 4 is：RX04、RX01、RX03、RX02；Access the driving core in third lens subassembly 300 The electric signal interface of piece 5 is：RX11、RX12、RX09、RX07；Access the telecommunications of the driving chip 6 in third lens subassembly 300 Number interface is：RX10、RX08、RX06、RX05.So as shown in figure 13：
The channel sequence for two fibre ribbons for accessing the first bridle wire apparatus Jumper B sides is respectively TX09-TX12-TX8- TX10；TX07-TX03-TX02-TX05；
The channel sequence for two fibre ribbons for accessing the second bridle wire apparatus Jumper A sides is respectively：TX04-TX11- TX06-TX01, RX04-RX01-RX03-RX02；
The channel sequence of two fibre ribbons of access third bridle wire apparatus Jumper C sides is respectively：RX11-RX12- RX09-RX07；RX10-RX08-RX06-RX05.
As shown in Figure 15 and Figure 16, be respectively connected to the first bridle wire apparatus Jumper B, the second bridle wire apparatus Jumper A and The optical fiber of the fibre ribbon of third bridle wire apparatus Jumper C sides accesses 700 side of the first fiber adapter after intersection so that access The optical fiber of 700 side of transmission channel access sequence and the first fiber adapter of access of the fibre ribbon of first fiber adapter, 700 side Band receiving channel access sequence be respectively：
TX01-TX02-TX03-TX04-TX05-TX06-TX07-TX08-TX09-TX10-TX11-TX12；And RX01- RX02-TX03-RX04-RX05-RX06-RX07-RX08-RX09-RX10-RX11-RX12。
With 600 corresponding the forth jump line of the 4th lens subassembly 400, the 5th lens subassembly 500 and the 6th lens subassembly The channel sequence of device Jumper B, the fifth jump line apparatus Jumper A and the fibre ribbon of the 6th bridle wire apparatus Jumper C sides is joined According to Figure 14.
Because the electric signal interface of the driving chip 7 in the 4th lens subassembly 400 of access is：TX17、TX15、TX13、TX18； The electric signal interface of the driving chip 8 accessed in the 4th lens subassembly 400 is：TX20、TX16、TX22、TX23；Access the 5th thoroughly The electric signal interface of driving chip 9 in mirror assembly 500 is：TX24、TX14、TX19、TX21；Access the 5th lens subassembly 500 The electric signal interface of interior driving chip 10 is：RX22、RX24、RX23、RX21；Access the driving in the 6th lens subassembly 600 The electric signal interface of chip 11 is：RX20、RX15、RX19、RX17；Access the driving chip 12 in the 6th lens subassembly 600 Electric signal interface is：RX16, RX18, RX13, RX14, so, as shown in figure 14：
The channel sequence for two fibre ribbons for accessing the forth jump line apparatus Jumper B sides is respectively TX17-TX15-TX13- TX18, TX20-TX16-TX22-TX23；
The channel sequence of two fibre ribbons of access the fifth jump line apparatus Jumper A sides is respectively：TX24-TX14- TX19-TX21, RX22-RX24-RX23-RX21；
The channel sequence for two articles of fibre ribbons for accessing the 6th bridle wire apparatus Jumper C sides is respectively：RX20-RX15- RX19-RX17, RX16-RX18-RX13-RX14.
It is respectively connected to the forth jump line apparatus Jumper B, the fifth jump line apparatus Jumper A and the 6th bridle wire apparatus Jumper The optical fiber of the fibre ribbon of C sides is accessed after intersection after 800 side of the second fiber adapter, 800 side of the second fiber adapter of access Fibre ribbon transmission channel access sequence and receiving channel access sequence be respectively：
TX13-TX14-TX15-TX16-TX17-TX18-TX19-TX20-TX21-TX22-TX23-TX24；
RX13-RX14-RX15-RX16-RX17-RX18-RX19-RX20-RX21-RX22-RX23-RX24。
Two flexible boards of optical module of above-mentioned 48 channel of the embodiment of the present invention and the connection relation and two of circuit board The distribution of lens subassembly on a flexible board is referring to Figure 17, after two flexible boards and the circuit board of the optical module of 48 channels are stacked Structure diagram referring to Figure 18, wherein, a lens subassembly on the first flexible board (being specially the second lens subassembly 200) is stacked A lens subassembly (being specially the 5th lens subassembly 500) on the front of circuit board, the second flexible board is stacked in circuit board Front, other two lens subassembly (being specially the first lens subassembly 100 and third lens subassembly 300) on the first flexible board It is stacked in the back side of circuit board, other two lens subassembly on the second flexible board (is specially the 4th lens subassembly 400 and the 6th Lens subassembly 600) back side of circuit board is stacked in, it is stacked in this way, be conducive to the volume miniaturization of optical module.
The installation diagram of the optical module of above-mentioned 48 channel of the embodiment of the present invention referring to Figure 19 and Figure 20, wherein, as in 19, light Module and cooling fin assemble, Figure 20 illustrate cooling fin, optical module upper casing, 48 channels optical module Rigid Flex, light The relative position relation between optical lens module, optical module lower casing and fiber adapter (tail optical fiber) in module.
In the optical module of above-mentioned 48 channel of the embodiment of the present invention, the combination of flexible board and circuit board may be used soft Harden plywood or soft board combination metal reinforcement plate etc., can meet the radiating requirements of optical module, may also be advantageous for designing volume Smaller, the higher optical module of density.
In the optical module of above-mentioned 48 channel of the embodiment of the present invention, optical fiber sequence is intersected when fibre ribbon makes, is made in PCB Cabling can be very smooth, only in the just wiring completely of two surface layers of top layer TOP and bottom Bottom, can accomplish that cabling is short, nothing Via few Via Design, greatly alleviate complicated PCB design difficulty, reduce PCB costs, it is often more important that improve electricity The transmission performance of signal, while use Rigid Flex designing scheme maximumlly optimizes the heat dissipation of driving chip.
In optical module provided in an embodiment of the present invention, specified location area on the driving chip and circuit board of lens subassembly Electric signal interface connects, and the bridle wire apparatus of lens subassembly is connected with fiber adapter by fibre ribbon, in order to make electric signal interface With the communicating passage of driving chip without intersecting or intersecting less, the electric signal interface of driving chip is accessed in the embodiment of the present invention is The electric signal interface of specified location area, and the electric signal interface of specified location area is the optical assembly driven according to driving chip The type of each electric signal interface and arrangement determine in type, circuit board.And the telecommunications of driving chip is accessed in the prior art Number interface is determined according to the scheduled intelligent acess sequence in fiber adapter side.Due to the electric signal interface of specified location area The sequence for being linked into driving chip is consistent with the channel sequence of fibre ribbon access bridle wire apparatus side, and fibre ribbon incoming fiber optic is adapted to The channel sequence of device side is typically preset access sequence, and the optical fiber in fibre ribbon of the embodiment of the present invention can intersect, disorderly Fiber adapter is accessed after sequence so that it is suitable that the sequence of intelligent acess to fiber adapter side in fibre ribbon meets default access Sequence, therefore, compared with prior art, the channel sequence of fibre ribbon access bridle wire apparatus side in the embodiment of the present invention, with fibre ribbon The channel sequence of incoming fiber optic adapter side is different.What the optical fiber inside optical module transmitted is optical signal, and optical fiber arbitrarily intersects, both The transmission of optical signal is not interfered with, the performance of optical module will not be influenced.Therefore, the embodiment of the present invention is by specified location area Electric signal interface is linked into driving chip, ensures electric signal interface and the communicating passage of driving chip without intersecting or intersect less, Solve PCB trace difficult problem in the prior art, can reach PCB trace largest optimization, cabling is smooth, cabling it is short, Coiling is few, reduces unnecessary via or without via, and then ensured the stability of optical module transmission performance.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation Property concept, then additional changes and modifications may be made to these embodiments.So appended claims be intended to be construed to include it is excellent It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to include these modifications and variations.

Claims (10)

1. a kind of optical module, which is characterized in that including：Circuit board, lens subassembly and optical fiber corresponding with the lens subassembly Adapter；
The driving chip of the lens subassembly is connected with the electric signal interface of specified location area on the circuit board, the driving Chip and the electric signal interface of the specified location area are set nearby, to reduce the electric signal interface of the specified location area With intersecting for the communicating passage of the driving chip；Wherein, the electric signal interface of the specified location area, according to the driving The type of each electric signal interface and arrangement determine in the optical assembly types of chip drives, the circuit board；
The bridle wire apparatus of the lens subassembly is connected with the fiber adapter by fibre ribbon, wherein, the designated position area The electric signal interface in domain is linked into the channel sequence of the driving chip and the fibre ribbon accesses the logical of the bridle wire apparatus side Road sequence is identical；The fibre ribbon accesses the channel sequence of the bridle wire apparatus side, accesses the optical fiber with the fibre ribbon and fits The channel sequence of orchestration side is different.
2. optical module as described in claim 1, which is characterized in that the lens subassembly is multiple, the multiple lens subassembly It is arranged on flexible board, the flexible board is stacked with the circuit board, and the flexible board passes through electric connector and the circuit board Connection；
Position of the driving chip on the flexible board, the close specified location area corresponding with the driving chip View field of the electric signal interface on the flexible board, to reduce the electricity of the driving chip and the specified location area The length of the communicating passage of signaling interface.
3. optical module as claimed in claim 2, which is characterized in that the lens subassembly on any flexible board includes first kind lens Component, the second class lens subassembly and the part in third class lens subassembly or combination；
Wherein, the first kind lens subassembly only includes the driving chip for driving light emission component；
The second class lens subassembly had not only included driving the driving chip of light emission component, but also including for driving light-receiving The driving chip of component；
The third class lens subassembly only includes the driving chip for driving light-receiving component.
4. optical module as claimed in claim 3, which is characterized in that
Electric signal interface on the circuit board including transmitting electric signal interface and receives electric signal interface；The transmitting telecommunications Number distributed areas of the interface on the circuit board are emitting area, point for receiving electric signal interface on the circuit board Cloth region is receiving area；
The emitting area includes：Second close to the first position region of the receiving area and far from the receiving area The band of position；
The receiving area includes：The 4th close to the third place region of the emitting area and far from the emitting area The band of position；
If the optical module includes multiple first kind lens subassemblies, multiple first kind lens subassemblies are in the flexibility Position on plate is distributed in the both sides of projected position of the first position region on the flexible board nearby；
If the optical module includes multiple second class lens subassemblies, multiple second class lens subassemblies are in the flexibility Position on plate is distributed in the projection position of the second position region and the third place region on the flexible board nearby The both sides put,
If the optical module includes multiple third class lens subassemblies, multiple third class lens subassemblies are in the flexibility Position on plate is distributed in the both sides of projected position of the 4th band of position on the flexible board nearby.
5. optical module as claimed in claim 4, which is characterized in that for any lens subassembly：
If the lens subassembly is the first kind lens subassembly, the driving chip in the lens subassembly, with described first It puts in region and is connected close to the transmitting electric signal interface of the lens subassembly side；
It is used to drive the driving of light emission component if the lens subassembly is the second class lens subassembly, in the lens subassembly Chip is connected with the transmitting electric signal interface close to the lens subassembly side in the second position region；The lens group For driving the driving chip of light-receiving component in part, with connecing close to the lens subassembly side in the third place region Receive electric signal interface connection；
If the lens subassembly is the third class lens subassembly, the driving chip in the lens subassembly, with described 4th It puts in region and is connected close to the reception electric signal interface of the lens subassembly side.
6. the optical module as described in any one of claim 3 to 5, which is characterized in that the flexible board is one, the optical mode Block includes the first fiber adapter and the second fiber adapter, the number of lens subassembly corresponding with first fiber adapter Amount, the quantity of lens subassembly corresponding equal to second fiber adapter；
Wherein, lens subassembly corresponding with first fiber adapter is distributed in each electric signal interface described soft The side of view field on property plate；Lens subassembly corresponding with second fiber adapter, is distributed in each telecommunications The opposite side of number view field of the interface on the flexible board.
7. optical module as described in claim 4 or 5, which is characterized in that the optical module includes the first fiber adapter and the Two fiber adapter；The flexible board includes the first flexible board and the second flexible board, first flexible board and described second soft Property plate is connected to the circuit board both sides；
Lens subassembly on first flexible board is corresponding with the first fiber adapter, the lens subassembly on second flexible board It is corresponding with the second fiber adapter；
Wherein, the quantity of the lens subassembly on first flexible board, equal to the number of the lens subassembly on second flexible board Amount.
8. optical module as claimed in claim 7, which is characterized in that first flexible board and second flexible board are stacked On the circuit board, the lens subassembly on lens subassembly, second flexible board on first flexible board is in the electricity Arrangement relationship on the plate of road, including：
Lens subassembly on first flexible board and second flexible board is arranged in the front of the circuit board；Alternatively,
In lens subassembly on first flexible board and second flexible board, the first kind lens subassembly and the third Class lens subassembly is arranged in the circuit board front, and the second class lens subassembly is arranged in the back of circuit board；Alternatively,
In lens subassembly on first flexible board and second flexible board, the first kind lens subassembly and the third Class lens subassembly is arranged in the back of circuit board, and the second class lens subassembly is arranged in the circuit board front.
9. optical module as claimed in claim 8, which is characterized in that be provided on first flexible board the first lens subassembly, Second lens subassembly and third lens subassembly；Be provided on second flexible board the 4th lens subassembly, the 5th lens subassembly and 6th lens subassembly, each lens subassembly include two driving chips；
First lens subassembly and the 4th lens subassembly are the first kind lens subassembly, and about the first position Region is symmetrical arranged；
Second lens subassembly and the 5th lens subassembly are the second class lens subassembly, and about the second position Region is symmetrical arranged with the third place region；
The third lens subassembly and the 6th lens subassembly are the third class lens subassembly, and about the 4th position Region is symmetrical arranged；
If the first position region includes 2N transmitting electric signal interface, two driving cores of first lens subassembly Piece is connected with N number of transmitting electric signal interface close to first flexible board in the first position region；4th lens Two driving chips of component, with N number of transmitting electric signal interface close to second flexible board in the first position region Connection；
If the second position region includes N number of transmitting electric signal interface, the third place region includes N number of reception electric signal One driving chip of interface, then second lens subassembly, with first flexible board close in the second position region N/2 transmitting electric signal interface connection, in a driving chip of the 5th lens subassembly, with the second position region Close to N/2 transmitting electric signal interface connection of second flexible board；Another driving chip of second lens subassembly, It is connected with the N/2 reception electric signal interface close to first flexible board in the third place region；5th lens Close to N/2 reception electric signal of second flexible board in another driving chip of component, with the third place region Orifice；
If the 4th band of position includes 2N reception electric signal interface, two driving cores of the third lens subassembly Piece is connected with N number of reception electric signal interface close to first flexible board in the 4th band of position；6th lens Two driving chips of component, with N number of reception electric signal interface close to second flexible board in the 4th band of position Connection.
10. optical module as claimed in claim 9, which is characterized in that the first bridle wire apparatus of setting in first lens subassembly, The second bridle wire apparatus of setting in second lens subassembly, the interior setting third bridle wire apparatus of the third lens subassembly；Described One bridle wire apparatus, second bridle wire apparatus and the third bridle wire apparatus access first optical fiber by two fibre ribbons Adapter；
Setting the forth jump line apparatus in 4th lens subassembly, the interior setting the fifth jump line apparatus of the 5th lens subassembly, institute State the 6th bridle wire apparatus of setting in the 6th lens subassembly；The forth jump line apparatus, the fifth jump line apparatus and the described 6th Bridle wire apparatus accesses second fiber adapter by two fibre ribbons；
It is respectively connected to the logical of the fibre ribbon of first bridle wire apparatus, second bridle wire apparatus and the third bridle wire apparatus side Road accesses the first fiber adapter side after intersection；
It is respectively connected to the logical of the fibre ribbon of the forth jump line apparatus, the fifth jump line apparatus and the 6th bridle wire apparatus side Road accesses the second fiber adapter side after intersection.
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