A kind of Dual-channel compact small from-factor pluggable
Technical field
The present invention relates to optical communication technique, especially a kind of compact pluggable light transceiving module.
Background technology
The abbreviation definition:
BOSA:(Bi-directional Optical Sub-Assembly) optical transceiver module interface module;
CSFP:(Compact Small From-Factor Pluggable) compact small from-factor pluggable;
SFP:(Small From-Factor Pluggable) SFP optical module;
MSA:(Multi-Source Agreement) multi-source agreement;
PLC:(Planar optical waveguide) planar optical waveguide;
PCB:(Printed Circuit Board) printed circuit board;
TO38/TO56/TO46: the packing forms of the different mechanical dimensions of optical device chip, more expensive being of little use of the less price of TO38 size wherein, TO56 and TO46 are mechanical dimension's structure commonly used.Be the optical transceiver module interface module after the TO optical chip is packaged into BOSA.
Along with the development of optical fiber communication, optical transmission system is had higher requirement to optical module.Optical module is gradually to low cost, small size, large capacity future development.In order to reach large capacity requirement and undersized requirement, twin-channel CSFP transceiver is realized the bidirectional transmit-receive of two passages under the original same overall dimensions, thereby and then makes original SFP panel space obtain double utilization to have improved port utilization ratio.The CSFP/CSFF bi-directional transceiver that these are highly integrated has improved data throughout so that network system supplier has doubled port density, thereby has reduced network equipment cost.The composition of binary channels CSFP optical module is consistent with conventional SFP, mainly comprises: mechanical structured member, two optical transceiver module interface module, logic control element, laser instrument drive and the limited range enlargement unit.Wherein, the cost of two optical transceiver module interface modules accounts for the chief component of whole CSFP optical module cost, has directly affected performance and the price of optical module.
CSFP MSA(Multi Source Agreement) League of Nations has defined and has adopted traditional SFP industrial standard overall dimensions single channel SFP MSA physical construction need realize the CSFP optical module of binary channels data transmission.
In order to satisfy the small size requirement, binary channels CSFP solution generally adopts the less PLC structured light transceiver module interface module of size at present, such as Fig. 1, or the free space coupling optical transceiver module interface module of TO38 encapsulation.
The shortcomings such as but it is high that currently used PLC technology light transmitting-receiving subassembly exists encapsulation technology to require, and the higher and design flexibility of cost is poor, simultaneously, this light transmitting-receiving subassembly production and sell overseas enterprise's monopolization is all arranged.In addition, adopt PLC technique, laser instrument and light signal receiving end chip all need be installed on the fixed position of optical waveguide, need to newly research and develop whole optical transceiver module interface module if need to change the chip model, can not satisfy the customization requirement.
Although the free space coupling optical transceiver module interface module size of TO38 encapsulation is less, TO38 size optical chip can not use in the optical modules such as the SFP of routine and SFF, and this has also caused its price higher, and encapsulation technology is immature.Simultaneously, utilize the BOSA structure of this TO38 size encapsulation also to be offbeat form, further increased the cost of optical module.
Compare with the optical transceiver module interface module that adopts the TO38 encapsulation with employing PLC technology, adopt the free space coupling light transmitting-receiving subassembly of traditional TO56/TO46 size chip package, be widely used in the conventional optical module productions such as SFP, but the CSFP for the binary channels data transmission, the optical transceiver module interface module that adopts this technology to encapsulate has the shortcoming that physical dimension is large and the optical receiving end chip pin can't directly be connected with PCB, and namely enables direct the connection with PCB also will exist the part HW High Way can't match condition.
Summary of the invention
Consider traditional free space coupling optical transceiver module interface module of TO56/TO46 size chip package, its chip size and packaging technology thereof are all very ripe, can satisfy the customization demand of the different optical device chip portfolios of client, and with low cost, the objective of the invention is the defective for prior art, provide on the basis of the traditional free space coupling optical transceiver module interface module that adopts TO56/TO46 size chip package that a kind of to have a cost low, size is little, can satisfy the Dual-channel compact small from-factor pluggable of the customization demand of the different optical device chip portfolios of client.
The technical solution used in the present invention is such: a kind of Dual-channel compact small from-factor pluggable, comprise the first optical transceiver module interface module, the second optical transceiver module interface module and pcb board, be provided with receiving end chip pin and transmitting terminal chip pin on two groups of optical transceiver module interface modules, it is characterized in that, also comprise soft board; Described the first optical transceiver module interface module and the second optical transceiver module interface module parallel arranged, the receiving end chip pin place direction of two groups of optical transceiver module interface modules is identical, and the transmitting terminal chip pin place direction of two groups of optical transceiver module interface modules is identical; Described two groups of optical transceiver module interface modules all carry out signal exchange by soft board and pcb board.
Preferably, described the first optical transceiver module interface module is identical with the second optical transceiver module interface module specification.
Preferably, also comprise module housing, module housing comprises again base and cover plate; Described the first optical transceiver module interface module, the second optical transceiver module interface module, pcb board and soft board are arranged in the base, and described cover plate is placed on the base.
Preferably, described optical transceiver module interface module comprises receiving end chip and transmitting terminal chip; Described receiving end chip package specification is TO46; Described transmitting terminal chip package specification is TO56.
Preferably, the receiving end chip pin unification of described the first optical transceiver module interface module and the second optical transceiver module interface module is towards the base bottom.
Preferably, the receiving end chip pin of described the first optical transceiver module interface module be connected to first signal receiving interface on the pcb board by soft board, the transmitting terminal chip pin of described the first optical transceiver module interface module is connected to first signal transmission interface on the pcb board by soft board.
Preferably, the receiving end chip pin of described the first optical transceiver module interface module is connected to first signal receiving interface on the pcb board by soft board, and the transmitting terminal chip pin of described the first optical transceiver module interface module is directly connected to the first signal transmission interface on the pcb board.
Preferably, the receiving end chip pin of described the second optical transceiver module interface module is connected to secondary signal receiving interface on the pcb board by soft board, and the transmitting terminal chip pin of described the second optical transceiver module interface module is connected to secondary signal transmission interface on the pcb board by soft board.
Preferably, the receiving end chip pin of described the second optical transceiver module interface module is connected to secondary signal receiving interface on the pcb board by soft board, and the transmitting terminal chip pin of described the second optical transceiver module interface module is directly connected to the secondary signal transmission interface on the pcb board.
In sum, the invention has the beneficial effects as follows:
The shortcomings such as the present invention adopts cheap TO56/TO46 encapsulation free space coupling optical transceiver module interface module to replace adopting in the industry the optical transceiver module interface module of PLC technique, has avoided employing PLC process costs high, and design flexibility is poor; The problems such as expensive and high encapsulation difficulty that adopt expensive TO38 structured light device to bring have also been avoided; Has the advantage that cost is low, size is little, can satisfy flexibly the customization design requirement of different optical device chip portfolios.
Description of drawings
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein:
Fig. 1 is PLC technique optical transceiver module interface module synoptic diagram.
Fig. 2 is free space coupling optical transceiver module interface module structural representation.
Fig. 3 is the first embodiment of the invention structural representation.
Fig. 4 is the vertical view of Fig. 3.
Fig. 5 is the second embodiment of the invention structural representation.
Fig. 6 is the vertical view of Fig. 5.
Mark in figure: the receiving terminal chip pin 202 of the transmitting terminal chip pin 201 second optical transceiver module interface modules of the receiving terminal chip pin 102 second optical transceiver module interface modules of the transmitting terminal chip pin 101 first optical transceiver module interface modules of the first optical transceiver module interface module 1 second optical transceiver module interface module 2 pcb board 3 soft board 4 transmitting terminal chip 5 receiving terminal chip 6 filter plate 7 light splitting piece 8 base 9 cover plate 10 first optical transceiver module interface modules.
Embodiment
This paper Key Term is explained:
The base bottom: be interpreted as to be positioned at base, and that face relative with cover plate.
Sending direction: be interpreted as with signal that electric signal transfers light signal to flow to consistent direction.
Receive direction: be interpreted as with signal that light signal transfers electric signal to flow to consistent direction.
Disclosed all features in this instructions, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this instructions (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
Traditional free space coupling optical transceiver module interface module of the TO56/TO46 encapsulation that the present invention that shown in Figure 2 is adopts, comprise receiving end chip 6, transmitting terminal chip 5, light splitting piece 8 and optical filter 7, its receiving end chip pin place direction is mutually vertical with transmitting terminal chip pin place direction, and in transmitting terminal chip pin place direction and this assembly light signal input and output direction on same straight line.The receiving end chip package is TO56 or TO46 in the optical transceiver module interface module, the transmitting terminal chip be encapsulated as TO56 or TO46.As of the present invention preferred embodiment a kind of, the receiving end chip package is TO46, the transmitting terminal chip be encapsulated as TO56.
Shown in Fig. 3 or 5, optical module of the present invention comprises module housing, the first optical transceiver module interface module 1, the second optical transceiver module interface module 2, soft board 4, pcb board 3.
Described module housing comprises again base 9 and cover plate 10, and described the first optical transceiver module interface module 1, the second optical transceiver module interface module 2, soft board 4, pcb board 3 are positioned in the base 9, and cover plate 10 is placed on the base 9.
First and second optical transceiver module interface module putting with the position in shell has uniqueness, two groups of optical transceiver module interface module parallel arranged, and its receiving end chip pin 102,202 makes one-piece construction put compactness towards base 9 bottoms.
The receiving end chip pin 102 of described the first optical transceiver module interface module is connected to first signal receiving interface on the pcb board by soft board 4, the transmitting terminal chip pin 101 of described the first optical transceiver module interface module can be connected to first signal transmission interface on the pcb board by soft board 4, also can be directly be connected with first signal transmission interface on the pcb board.The connected mode of the second optical transceiver module interface module and pcb board and the connected mode of the first optical transceiver module interface module and pcb board are consistent, that is: the receiving end chip pin 202 of the second optical transceiver module interface module is connected to secondary signal receiving interface on the pcb board by soft board, the transmitting terminal chip pin 201 of described the second optical transceiver module interface module can be connected to secondary signal transmission interface on the pcb board by soft board, also can be directly be connected with secondary signal transmission interface on the pcb board.
Be provided with impedance transmission lines on the described soft board, with the receiving end chip of assurance optical transceiver module interface module or the impedance matching between transmitting terminal chip and the pcb board signaling interface.
Fig. 3, shown in Figure 4 be the first embodiment of the present invention, namely the receiving end chip pin of optical transceiver module interface module, transmitting terminal chip pin are connected on the pcb board by two groups of soft boards.Fig. 5, shown in Figure 6 be the second embodiment of the present invention, namely the receiving end chip pin of optical transceiver module interface module is connected on the pcb board by soft board, the transmitting terminal chip pin is directly connected on the pcb board.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.