CN103809251A - Signal transmission module - Google Patents
Signal transmission module Download PDFInfo
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- CN103809251A CN103809251A CN201210440842.XA CN201210440842A CN103809251A CN 103809251 A CN103809251 A CN 103809251A CN 201210440842 A CN201210440842 A CN 201210440842A CN 103809251 A CN103809251 A CN 103809251A
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- fiber coupler
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- signal transmission
- conversion element
- transmission module
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Abstract
A signal transmission module comprises a photoelectric conversion element packaging part and an optical fiber coupler. A photoelectric conversion element of one of a light emission element and a light reception element is assembled on the photoelectric conversion element packaging part, thereby facing the side of a resin pedestal. The optical fiber coupler comprises a light transmission hole and is used for coupling optical fibers in cylindrical parts. The optical fiber coupler is assembled at the side of the resin pedestal. The optical fiber coupler connects a large-diameter cylindrical part with a small-diameter cylindrical part, wherein the large-diameter cylindrical part is long and has a larger diameter while the small-diameter cylindrical part is short and has a smaller diameter, the internal of the two cylindrical parts forms the light transmission hole, and the small-diameter cylindrical part is assembled in the light transmission hole in the resin pedestal. The signal transmission module is characterized in that the height of the large-diameter cylindrical part is h1, the height of the small-diameter cylindrical part is h2, and the value of h1/h2 is from 8 to 10.
Description
Technical field
The present invention relates to a kind of signal transmission module, especially a kind of signal transmission module piece, is specifically related to the signal transmission module piece for optical coupled between optical fiber and photo-electric conversion element.
Background technology
Optical fiber communication is the communication mode take optical fiber as transmission medium.Optical fiber communication main circuit will be made up of optical transmitter, photoreceiver, optical fiber (or optical cable) etc.The advantage of optical fiber communication has: 1. available bandwidth, and message capacity is large; 2. anti-electromagnetic interference (EMI) is strong; 3. optical fiber is insulator, and communication two ends can be completely achieved electric isolation; 4. fibre loss is less, and repeater span is long; 5. optical fiber is thin, lightweight, easily lays etc. after formation optical cable.
In the optical communication of the optical information that can utilize optical fiber high-speed transfer to obtain by a large amount of numerical information of opto-electronic conversion, signal transmission module piece for optical coupled optical fiber be fitted in one of them photo-electric conversion element of the photocell of photoelectric conversion element package part and light receiving element.
As sort signal transport module piece (optic module), develop various version.As conventional example, exist one to comprise the optic module (for example,, referring to reference document 1 Japanese Patent Application Publication No.2006-30813) of light-emitting device (or optical receiving device) and housing.
Fig. 1 is longitdinal cross-section diagram, shows traditional fiber module.
As shown in Figure 1, traditional fiber module 100 comprises: light-emitting device (or optical receiving device) 110, and wherein photocell (or light receiving element) 112 and light transmitting IC (or light-receiving IC) 113 are fitted into a side 111a of substrate 111; With housing 120, described housing and optical fiber (not shown) are coupled and are arranged on a side 111a of substrate 111.
In light-emitting device 110, LED (light emitting diode) etc. are as photocell 112.On the other hand, PD (photodiode) etc. are as light receiving element 112, and photocell 112 or light receiving element 112 one of them be fitted into substrate 111.
In housing 120, cylindrical sleeve 120a and square main body 120b are connected to each other and monolithic molding, wherein cylindrical sleeve 120a has the light transmission hole 120a1 being formed at wherein, this light transmission hole is for insertion/drawn optical fiber (not shown), described square main body 120b has the ladder recess 120b1 being formed at wherein, and this ladder recess is used for holding light-emitting device (or optical receiving device) 110.
Be filled in the recess 120b1 of main body 120b of housing 120 for the sealing resin 121 that seals photocell (or light receiving element) 112 of being connected with substrate 111 and light transmitting IC (or light-receiving IC) 113, and transparent epoxy resin etc. is as sealing resin 121.
In reference document, describe, when light-emitting device (or optical receiving device) 110 is contained in the recess 120b1 in the main body 120b of housing 120, recess 111b1 on being formed on the hook 120b2 on sidewall respect to one another in main body 120b and being formed on substrate 111 on the top and the bottom of the opposite side 111b relative with a side 111a engages, so that the photocell (or light receiving element) 112 that is fitted into substrate 111 has identical optical axis K with the light transmission hole 120a1 being formed in the sleeve 120a of housing 120, thereby allow to reduce the artificial time of assembling optical fiber module 100, and reduce its cost.
A kind of signal transmission module piece is disclosed in addition in american documentation literature (US2011/0026937A1), a kind of signal transmission module piece, comprise: photoelectric conversion element package part, one of them photo-electric conversion element of photocell and light receiving element is fitted into described photoelectric conversion element package part, thereby towards a side of resin pedestal; And fiber coupler, described fiber coupler comprises light transmission hole, be used at stylolitic part coupled fiber, described fiber coupler is arranged on a described side of described resin pedestal, and wherein said photo-electric conversion element and the described smooth transmission hole being formed in described fiber coupler are assembled into and optical axis alignment; In described photoelectric conversion element package part, described photo-electric conversion element is fitted into the opposite side relative with a described side of described resin pedestal, and described photo-electric conversion element is arranged in to run through between a described side and described opposite side offers Kong center, with described optical axis alignment.
But above-mentioned signal transmission module piece of the prior art all exists the combination between coupling mechanism and pedestal fastening not, unreasonable structure, volume is excessive, the defect that coupling light loss is larger.
Summary of the invention
The present invention is directed to the problems referred to above and propose, signal transmission module signal transmission module signal transmission module signal transmission module.
A kind of signal transmission module piece, comprising:
Photoelectric conversion element package part, one of them photo-electric conversion element of photocell and light receiving element is fitted into described photoelectric conversion element package part, thereby towards a side of resin pedestal; With
Fiber coupler, described fiber coupler comprises light transmission hole, be used at stylolitic part coupled fiber, described fiber coupler is arranged on a described side of described resin pedestal, the large-diameter cylindrical part that described fiber coupler is grown being formed as and diameter is larger be formed as minor diameter stylolitic part shorter and that diameter is less and be connected, thereby in two stylolitic parts, form described smooth transmission hole, and
Described minor diameter stylolitic part is fitted in the described smooth transmission hole of offering in described resin pedestal; It is characterized in that:
If the height of above-mentioned large-diameter cylindrical part is h1, the height of minor diameter stylolitic part is h2, and h1/h2 is 8-10.
The diameter of described minor diameter stylolitic part is d1, the diameter of light transmission hole is d2, set d1 and be slightly larger than d2, while making, by certain external force, minor diameter stylolitic part is inserted to described smooth transmission hole, make described smooth transmission hole slightly produce certain elastic deformation, but above-mentioned elastic deformation is unlikely to cause pedestal to produce crack.
Described fiber coupler is provided with the imaging len that is arranged in described smooth transmission hole.
Described fiber coupler is provided with the imaging len that is arranged in described smooth transmission hole.
Beneficial effect
Signal transmission module piece of the present invention can accurately be located, one of them is aimed at preferably to make the transmitting of optical fiber and light or receiving element, thereby realize high-quality light transmission, the positioning component that has simultaneously adopted specific proportions due to the present invention, it is in conjunction with easy, fastening, simplify manufacture craft, improved production efficiency, reduced cost, simultaneous faults rate reduces greatly.
Accompanying drawing explanation
Fig. 1 is longitdinal cross-section diagram, shows traditional fiber module;
Fig. 2 is decomposition diagram, shows the signal transmission module piece in decomposing state that meets embodiment of the present invention;
Fig. 3 is longitdinal cross-section diagram, shows the signal transmission module piece that meets embodiment of the present invention;
Fig. 4 (a) to 4 (h) be process schematic diagram, show the manufacture process of photo-electric conversion element shown in Fig. 2 and 3;
Fig. 5 is decomposition diagram, shows the signal transmission module piece in decomposing state in modified example, and the signal transmission module piece that wherein meets embodiment of the present invention part occurs and changes;
Fig. 6 is longitdinal cross-section diagram, shows the signal transmission module piece in modified example, and the signal transmission module piece that wherein meets embodiment of the present invention part occurs and changes.
] Reference numeral
1 meets the signal transmission module piece of embodiment
Signal transmission module piece in 1 ' modified example, there is part and changes in the signal transmission module piece 1 that wherein meets embodiment
10 photoelectric conversion element package parts
11 resin pedestals
11a mono-side
11b opposite side
11c positioning round orifice
11d bottom
12 photo-electric conversion elements
13 dish type circuit boards
14 lead frames
14a mono-side
14b opposite side
14c lead terminal
15 rectangular circuit board
16 surperficial erecting equipments (SMD)
17 IC parts (LSI)
18 IC sealing resins
20 fiber couplers
Fiber coupler in 20 ' modified example
20a large-diameter cylindrical part
20b minor diameter stylolitic part
20c light transmission hole
20d imaging len
K optical axis
Embodiment
Explain in detail referring now to Fig. 2 to 6 the signal transmission module piece that meets embodiment of the present invention.
Fig. 2 is decomposition diagram, show the signal transmission module piece of the decomposing state that meets embodiment of the present invention, Fig. 3 is longitdinal cross-section diagram, show the signal transmission module piece that meets embodiment of the present invention, and Fig. 4 (a) to 4 (h) be process schematic diagram, show the process of photoelectric conversion element package part shown in shop drawings 2 and 3.
As shown in Figures 2 and 3, comprise according to the signal transmission module piece 1 of embodiment of the present invention: photoelectric conversion element package part 10, one of them photo-electric conversion element 12 of photocell and light receiving element is fitted into described photoelectric conversion element package part, thereby towards a side 11a of resin pedestal 11 who forms substantial rectangular physical form; With fiber coupler 20, described fiber coupler comprises light transmission hole 20c, be used at stylolitic part 20a and 20b coupled fiber (not shown), and described fiber coupler is arranged on resin pedestal 11 1 side 11a, and light transmission hole 20c in photo-electric conversion element 12 and fiber coupler 20 is assembled into optical axis K and aims at.
In fiber coupler 20, photo-electric conversion element 12 is fitted in opposite side 11b relative with a side 11a on resin pedestal 11, and photo-electric conversion element 12 is arranged in and runs through the positioning round orifice 11c center of offering between a side 11a and opposite side 11b, K aims at optical axis, thereby allows to reduce the size of signal transmission module piece 1.
Form each element next coming in order introduction of the signal transmission module piece 1 of embodiment according to the invention.
First, in photoelectric conversion element package part 10, this packaging part is the associated components of the signal transmission module piece 1 in present embodiment, resin pedestal 11 utilizes resin material substantially to form rectangular solid shape, there is predetermined thickness, and one of them photo-electric conversion element 12 of photocell and light receiving element is fitted into the opposite side 11b relative with a side 11a, has the gap of predetermined thickness between the two.
In the present embodiment, because photo-electric conversion element 12 solderings are in the center of the dish type circuit board 13 of formation dish type, and dish type circuit board 13 is connected to a side 14a of lead frame 14, and lead frame 14 is bonded to the opposite side 11b of resin pedestal 11, so photo-electric conversion element 12 is fitted into the opposite side 11b of resin pedestal 11 via dish type circuit board 13 and lead frame 14.
In addition, resin pedestal 11 is offered through hole between a side 11a and opposite side 11b, and to form the positioning round orifice 11c aiming at optical axis K, and the dish type circuit board 13 that photo-electric conversion element 12 is soldered to this circuit board center is fitted in positioning round orifice 11c.Therefore, photo-electric conversion element 12 is arranged in the positioning round orifice 11c center of aiming at optical axis K.
As mentioned above, photocell and light receiving element one of them as photo-electric conversion element 12.In the time that photocell is used as photo-electric conversion element 12, LED (light emitting diode) or VCSEL (Vcsel) are as photocell.On the other hand, in the time that light receiving element is used as photo-electric conversion element 12, PD (photodiode) is as light receiving element.
In this embodiment, as a kind of VCSEL of photocell as photo-electric conversion element 12 and be soldered to the center of dish type circuit board 13.
Current-carrying plate such as conductive copper plate is as lead frame 14.In lead frame 14, a side 14a be both evenly shaped with the relative opposite side 14b in thickness of slab gap with a side 14a, and on it, soldering has the dish type circuit board 13 of photo-electric conversion element 12 to be connected to a side 14a.On the other hand, as shown in Figure 3, rectangular circuit board 15 is connected to opposite side 14b, SMD (surperficial erecting equipment) 16 and IC parts (LSI (large-scale integrated)) 17 are soldered to described rectangular circuit board 15, and multiple lead terminal 14c to downward-extension stretches out from the bottom 11d of resin pedestal 11.
Adopt the integrated little and thin packaging part of photoelectric conversion element package part 10 of manufacturing in this way, and there is gratifying q&r.
Return to Fig. 2 and 3, the fiber coupler 20 being arranged on a side 11a of resin pedestal 11 (for example utilizes light transmission plastics, PEI, PC or PMMA) injection mould makes stepped cylindrical, so that stylolitic part 20 and stylolitic part 20b shorter and that diameter is little long and that diameter is large are connected with each other, and be formed as from large-diameter cylindrical part 20a for the light transmission hole 20c of insert/drawn optical fiber (not shown), extend to minor diameter stylolitic part 20b, and imaging len 20d whole installation is in light transmission hole 20c, if the height of large-diameter cylindrical shape part 20a is h1, the height of minor diameter stylolitic part 20b is h2, h1/h2 is preferably 8-10, if above-mentioned ratio is greater than 10, large-diameter cylindrical part 20a is excessive than minor diameter stylolitic part 20b, when small diameter portion 20b is inserted to positioning round orifice 11c, if, described signal transmission module horizontal positioned as shown in Figure 3, because center of gravity is too outer, the moment that gravity produces is excessive, make only to rely on the comparatively difficulty of the fixing described fiber coupler 20 of combination of small diameter portion 20b and positioning round orifice 11c, its probability coming off increases greatly, corresponding fault generation rate increases greatly.If above-mentioned ratio is less than 8, that is to say that the height of large-diameter cylindrical part 20a is lower, it is unfavorable for the maintenance to fibre bundle.
In the time that photocell is used as photo-electric conversion element 12, in the imaging len 20d being integrally formed in fiber coupler 20, a side towards photocell forms flat surface, and the light emission from photocell transmitting is formed to nonreentrant surface to a side of described flat surface.
In the time that light receiving element is used as photo-electric conversion element 12, the imaging len 20d being integrally formed in fiber coupler 20 can adopt contrary mode to form, so that nonreentrant surface (not shown) is towards light receiving element.
Because imaging len 20d is arranged in the light transmission hole 20c being formed in fiber coupler 20, so in the time that photocell is used as photo-electric conversion element 12, can converge in satisfactorily on optical fiber (not shown) from the light of photocell.On the other hand, in the time that light receiving element is used as photo-electric conversion element 12, can converge in satisfactorily on light receiving element from the light of optical fiber (not shown).Therefore, can realize the optical communication that reliability is high.
The large-diameter cylindrical part 20a being formed in fiber coupler 20 is formed on the side for insert/drawn optical fiber (not shown).On the other hand, the minor diameter stylolitic part 20b being formed in fiber coupler 20 is fitted in positioning round orifice 11c, and fixes with cementing agent (not shown), and wherein positioning round orifice 11c runs through resin pedestal 11 and is opened between a side 11a and opposite side 11b.
The diameter of described minor diameter stylolitic part 20a is d1, the diameter of positioning round orifice 11c is d2, set d1 and be slightly larger than d2, by certain external force, minor diameter stylolitic part 20a is inserted to positioning round orifice 11c, make positioning round orifice 11c slightly produce certain elastic deformation, but above-mentioned elastic deformation is unlikely to cause pedestal 11 to produce crack.The benefit arranging is like this: only rely on cooperatively interacting of minor diameter stylolitic part 20a and positioning round orifice 11c just can determine that both are in conjunction with more firm, simultaneously because above-mentioned two parts push mutually, between the outer wall of diameter stylolitic part 20a and positioning round orifice 11c inwall, there is not gap, in the situation that not needing in addition encapsulant to be set, just can guarantee like this optically-coupled preferably between photo-coupler 20 and pedestal, can prevent that external stray light line from entering, reduce optical coupling loss, the optical communication quality of raising.
Therefore, be fitted in the photo-electric conversion element 12 of resin pedestal 11 opposite side 11b, and the light transmission hole 20c and the imaging len 20d that are formed in fiber coupler 20 can assemble with high position precision, K aims at optical axis, and can provide performance gratifying signal transmission module piece, and can not cause optical axis misalignment.
In in the minor diameter stylolitic part 20b of fiber coupler 20 is fitted in the positioning round orifice 11c being formed in resin pedestal 11, do not need to fill the space of sealing resin in photo-electric conversion element 12 front portions, this is different from conventional example.In addition,, because the profile of fiber coupler 20 is only column, so that signal transmission module piece 1 can be made is less, and its entire length L (Fig. 3) can arrange shorter.Because the mould for fiber coupler 20 is very expensive, so that the unit price of signal transmission module piece 1 becomes is reasonable.
Referring now to the signal transmission module piece in Fig. 5 and 6 summary modified example, in this modified example, the signal transmission module piece that meets embodiment of the present invention carries out part change.
Fig. 5 is decomposition diagram, shows the signal transmission module piece in decomposing state in modified example, and in described modified example, the signal transmission module piece that meets embodiment of the present invention part occurs and changes.Fig. 6 is longitdinal cross-section diagram, shows the signal transmission module piece in modified example, and in this modified example, the signal transmission module piece that meets embodiment of the present invention part occurs and changes.
In signal transmission module piece 1 ' in the modified example shown in Fig. 5 and 6, in fiber coupler 20 ', only some shape is different from the configuration of the signal transmission module piece 1 that meets the first embodiment of explaining with reference to Fig. 2 and 3, and similarly Reference numeral refers to similar parts or element, and it is described in order conveniently to omit.Main summary place different from the embodiment described above now.
As illustrated in Figures 5 and 6, signal transmission module piece 1 ' in the modified example that a part for above-mentioned embodiment occurs to change also comprises photoelectric conversion element package part 10, one of them photo-electric conversion element 12 of photocell or light receiving element is fitted into described photoelectric conversion element package part 10, thereby in the face of substantially forming a side 11a of the resin pedestal 11 of rectangular solid shape; With fiber coupler 20 ', described fiber coupler comprises for the light transmission hole 20c at stylolitic part 20a and 20b coupled fiber (not shown), and be arranged on a side 11a of resin pedestal 11, and the light transmission hole 20c in photo-electric conversion element 12 and fiber coupler 20 ' is assembled into optical axis K and aims at, and is similar to above-mentioned embodiment.
Fiber coupler 20 ' be according to the fiber coupler something in common of above-mentioned embodiment, photo-electric conversion element 12 is fitted into opposite side 11b relative with a side 11a on resin pedestal 11, and photo-electric conversion element 12 is arranged in positioning round orifice 11d center, this positioning round orifice runs through and is opened between a side 11a and opposite side 11b, K aims at optical axis, thereby allows to reduce the size of the signal transmission module piece 1 ' in described modified example.
Be with the difference of the first embodiment, light transmission hole 20c runs through between the large-diameter cylindrical part 20a and minor diameter stylolitic part 20b that is opened in column fiber coupler 20 ', and in light transmission hole 20c, imaging len is not set, to simplify fiber coupler 20 '.
Therefore, existing low-cost resin material can be for fiber coupler 20 ', and does not need to use as above-mentioned embodiment the resin material that optical transparence is high.In fiber coupler 20 ', and then, due to imaging len not being set, so can reduce die cost, thereby allow to provide the signal transmission module piece 1 ' in modified example, sort signal transport module piece can more easily adopt with the cost lower than above-mentioned embodiment.
Although described the present invention with reference to specific implementations of the present invention, the present invention is not limited to above-mentioned embodiment.According to above-mentioned instruction, those skilled in the art will obviously understand remodeling and the distortion of above-mentioned embodiment.Scope of the present invention limits according to following claims.
Claims (4)
1. a signal transmission module piece, comprising:
Photoelectric conversion element package part, one of them photo-electric conversion element of photocell and light receiving element is fitted into described photoelectric conversion element package part, thereby towards a side of resin pedestal; With
Fiber coupler, described fiber coupler comprises light transmission hole, be used at stylolitic part coupled fiber, described fiber coupler is arranged on a described side of described resin pedestal, the large-diameter cylindrical part that described fiber coupler is grown being formed as and diameter is larger be formed as minor diameter stylolitic part shorter and that diameter is less and be connected, thereby in two stylolitic parts, form described smooth transmission hole, and
Described minor diameter stylolitic part is fitted in the described smooth transmission hole of offering in described resin pedestal; It is characterized in that:
If the height of above-mentioned large-diameter cylindrical part is h1, the height of minor diameter stylolitic part is h2, and h1/h2 is 8-10.
2. signal transmission module piece as claimed in claim 1, the diameter that it is characterized in that described minor diameter stylolitic part is d1, the diameter of light transmission hole is d2, set d1 and be slightly larger than d2, while making, by certain external force, minor diameter stylolitic part is inserted to described smooth transmission hole, make described smooth transmission hole slightly produce certain elastic deformation, but above-mentioned elastic deformation is unlikely to cause pedestal to produce crack.
3. signal transmission module piece as claimed in claim 1, is characterized in that, described fiber coupler is provided with the imaging len that is arranged in described smooth transmission hole.
4. signal transmission module piece as claimed in claim 2, is characterized in that, described fiber coupler is provided with the imaging len that is arranged in described smooth transmission hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210440842.XA CN103809251A (en) | 2012-11-07 | 2012-11-07 | Signal transmission module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210440842.XA CN103809251A (en) | 2012-11-07 | 2012-11-07 | Signal transmission module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103809251A true CN103809251A (en) | 2014-05-21 |
Family
ID=50706285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210440842.XA Pending CN103809251A (en) | 2012-11-07 | 2012-11-07 | Signal transmission module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103809251A (en) |
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2012
- 2012-11-07 CN CN201210440842.XA patent/CN103809251A/en active Pending
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Application publication date: 20140521 |