CN205356351U - Light -receiving subassembly that possesses OTDR wavelength filtering capability - Google Patents
Light -receiving subassembly that possesses OTDR wavelength filtering capability Download PDFInfo
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- CN205356351U CN205356351U CN201620016698.0U CN201620016698U CN205356351U CN 205356351 U CN205356351 U CN 205356351U CN 201620016698 U CN201620016698 U CN 201620016698U CN 205356351 U CN205356351 U CN 205356351U
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Abstract
The utility model relates to a light communication technology field has provided a light -receiving subassembly that possesses OTDR wavelength filtering capability, the light -receiving subassembly includes the optical adapter and a built -up member of area pottery lock pin, and is specific: the optical adapter that takes ceramic lock pin with the terminal surface of the ceramic lock pin of one side that the built -up member is connected is the beveled tip face, plate the actual transmitting data's of transmissive light signal on the beveled tip face to can make OTDR light reflex or absorbed film, the built -up member include by PD chip or APD chip both one of the smooth receiving circuit that forms with the TIA chip. The embodiment of the utility model provides a light -receiving subassembly that possesses OTDR wavelength filtering capability who provides makes the OTDR wavelength reach more than the 10dB for the isolation that the light -receiving subassembly actually transmits applied optical wavelength, makes the OTDR light power control who actually reachs the light detector chip endure the within range at the receiver, avoids the too big receiver that leads to of OTDR luminous power to damage.
Description
Technical field
This utility model relates to technical field of photo communication, particularly relates to a kind of light-receiving assembly possessing OTDR wavelength filtering function.
Background technology
It is presently used for the photoreceiver of optical communication field, is divided into PD receiver and avalanche photodetector (Avalanchephotodetector, is abbreviated as: APD) receiver by photo-detector type.In high-speed optical transmission net is applied, PD receiver is mainly used in short-distance and medium-distance transmission, and APD receiver is then widely used in long range propagation.
Optical time domain reflectometer (OpticalTimeDomainReflectometer, it is abbreviated as: OTDR) it is a kind of conventional instrument in measuring techniques for optical fiber field, it can carry out the measurement of fiber lengths, the transmission attenuation of optical fiber, joint decay and fault location etc..
The optical wavelength of OTDR has multiple, common are 1310nm, 1490nm, 1550nm, 1625nm and 1650nm etc., and wavelengths above is all in the wave-length coverage that conventional photoreceiver can respond.
Equipment and system manufacturer would generally adopt the OTDR of specific wavelength to carry out test optical fiber.OTDR output pulsed light power generally up to 20dBm even more than, when testing with OTDR, the photoreceiver that its test link far-end connects does not disconnect under many circumstances from circuit, when link attenuation is less, the temporarily saturated even permanent damage of receiver inside chip finally enters the input optical power that the light of photoreceiver is likely to still can maximum more than receiver bear, thus can be caused.
For equipment and system manufacturer, owing to luminous power is excessive when how to solve OTDR on-line testing, cause that receiver damages, be a current problem in the urgent need to address.
Reception for optical module designs, and is currently used in the technical scheme of luminous power overload protection, generally has 2 kinds:
(1) take the scheme of design protection circuit, APD or the PD circuit of receiver increases current-limiting resistance, it is possible to control the photoelectric current after stablizing to a certain extent.But for happen suddenly incidence in the case of, particularly when OTDR incident optical power is very big, owing to the response time of high speed APD and PD chip is shorter, before current-limiting resistance works, have the APD chip of current multiplication function particularly with inside, the photoelectric current peak value that chip produces is beyond the tolerance range of chip.
For the PD receiver worked under low bias, the method adopting above-mentioned increase current-limiting resistance, also can affect the overload performance of receiver.
Therefore the method for design protection circuit is difficult to solve this problem.
(2) integrated micro-mechano electric system (MicroElectroMechanicalSystem on the optical adapter of light-receiving assembly is adopted, be abbreviated as: MEMS) variable optical attenuator (VariableOpticalAttenuator, be abbreviated as: VOA) scheme, by regulate driving voltage control VOA attenuation.But the internal structure of the optical adapter of this scheme is complex, it is relatively big that technique realizes difficulty, and the response speed of VOA is difficult to protect quick high power more slowly and injects.This optical adapter is expensive simultaneously, it is impossible to meet existing light-receiving component batch and cost requirement.
It is therefore desirable to design a kind of light-receiving assembly possessing OTDR wavelength filtering function, to overcome the problems referred to above.
Utility model content
The purpose of this utility model is in that to overcome the defect of prior art, it is provided that a kind of light-receiving assembly possessing OTDR wavelength filtering function.
This utility model is achieved in that
This utility model provides a kind of light-receiving assembly possessing OTDR wavelength filtering function, and described light-receiving assembly includes an optical adapter with ceramic insertion core and an assembly, concrete:
The end face of the ceramic insertion core of the side that the described optical adapter with ceramic insertion core is connected with described assembly is angled end-face, described angled end-face is coated with the optical signal of transmissive actual transmissions data, and can make OTDR luminous reflectance or absorbed thin film；
Described assembly includes the optical receiving circuit being made up of PD chip and TIA chip；Or, described assembly includes the optical receiving circuit being made up of APD chip and TIA chip.
Preferably, the wavelength of optical signal of described thin film institute transmission ranges for 1500～1570nm, and the OTDR optical wavelength range that described thin film is reflected or absorbs is 1610～1670nm.
Preferably, described angled end-face is 6～10 ° with the angle in the face being perpendicular to described ceramic insertion core centrage.
Preferably, described optical adapter with ceramic insertion core and described assembly are fixed by laser weld；Wherein, described laser weld carries out after the coupling completing described ceramic insertion core and described PD chip；Or, described laser weld carries out after the coupling completing described ceramic insertion core and described APD chip.
Preferably, described assembly is specially TO-CAN assembly.
This utility model has the advantages that
A kind of light-receiving assembly possessing OTDR wavelength filtering function that this utility model embodiment provides, OTDR wavelength is made to reach more than 10dB relative to the isolation of light-receiving assembly actual transmissions application optical wavelength, make the OTDR optical power control being actually reached photo detector chip in receiver tolerance range, it is to avoid OTDR luminous power is excessive causes that receiver damages.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The structural representation of a kind of light-receiving assembly possessing OTDR wavelength filtering function that Fig. 1 provides for this utility model embodiment；
The coating film area structural representation of a kind of adapter with ceramic insertion core that Fig. 2 provides for this utility model embodiment；
The internal electrical schematic diagram of a kind of TO-CAN assembly that Fig. 3 provides for this utility model embodiment.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model, rather than whole embodiments.Based on the embodiment in this utility model, all other embodiments that those of ordinary skill in the art obtain under the premise not making creative work, broadly fall into the scope of this utility model protection.
Embodiment one:
Such as Fig. 1-Fig. 2, this utility model embodiment provides a kind of light-receiving assembly possessing OTDR wavelength filtering function, and described light-receiving assembly includes an optical adapter with ceramic insertion core and an assembly, concrete:
The end face of the ceramic insertion core of the side that the described optical adapter with ceramic insertion core is connected with described assembly is angled end-face, described angled end-face is coated with the optical signal of transmissive actual transmissions data, and can make OTDR luminous reflectance or absorbed thin film；
Described assembly includes the optical receiving circuit being made up of PD chip and TIA chip；Or, described assembly includes the optical receiving circuit being made up of APD chip and TIA chip.
This utility model embodiment makes OTDR wavelength reach more than 10dB relative to the isolation of light-receiving assembly actual transmissions application optical wavelength, make the OTDR optical power control being actually reached photo detector chip in receiver tolerance range, it is to avoid OTDR luminous power is excessive causes that receiver damages.
In conjunction with this utility model embodiment, there is a kind of preferred scheme, wherein, the wavelength of optical signal of described thin film institute transmission ranges for 1500～1570nm, and the OTDR optical wavelength range that described thin film is reflected or absorbs is 1610～1670nm.
In conjunction with this utility model embodiment, there is a kind of preferred scheme, wherein, the angle in described angled end-face and the face being perpendicular to described ceramic insertion core centrage is 6～10 °.
In conjunction with this utility model embodiment, there is a kind of preferred scheme, wherein, described optical adapter with ceramic insertion core and described assembly are fixed by laser weld；Wherein, described laser weld carries out after the coupling completing described ceramic insertion core and described PD chip；Or, described laser weld carries out after the coupling completing described ceramic insertion core and described APD chip.
In conjunction with this utility model embodiment, there is a kind of preferred scheme, wherein, described assembly is specially TO-CAN assembly.
Embodiment two:
This utility model embodiment based on embodiment one is disclosed can implementation, it is provided that the implementation of a kind of concrete light-receiving assembly possessing OTDR wavelength filtering function.
As it is shown in figure 1, this light-receiving assembly includes an optical adapter 1 with ceramic insertion core, TO-CAN assembly 2.The described optical adapter 1 with ceramic insertion core, one side end face of its ceramic insertion core 11 is PC face (PC face is light input end face), opposite side end face is that (angled end-face is light output end face to angled end-face, and and the angle that is perpendicular between the face of described ceramic insertion core centrage be that β, β are preferably 8 °).The described optical adapter 1 with ceramic insertion core, its internal axial optical fiber is single-mode fiber.
Such as Fig. 2, for the OTDR optical wavelength of practical application, by selecting and appropriate design Coating Materials and thickness, on the angled end-face of described ceramic insertion core 11, plating can make the optical signal transmission of actual transmissions data, and makes the thin film of OTDR luminous reflectance.The zone of reflections making plated thin film controls, at 1610～1670nm wave band, the OTDR wavelength of practical application to be completely covered.
Such as Fig. 3, the internal optical receiving circuit with an APD (or PD) chip 21 and a TIA chip 22 composition of described TO-CAN assembly 2, employing paster and gold wire bonding technique complete the encapsulation to above-mentioned two chips.
Such as Fig. 1, between described optical adapter 1 and described TO-CAN assembly 2 with ceramic insertion core, it is be attached by laser welding process.
Described ceramic insertion core 11 after plated film, OTDR wavelength is made to reach more than 10dB relative to the isolation of light-receiving assembly actual transmissions application optical wavelength, make the OTDR luminous power of arrival described APD (or PD) chip 21, control in the tolerance range of APD (or PD) chip 21 and TIA chip 22, it is to avoid OTDR luminous power is excessive causes that receiver damages.
The simultaneously described ceramic insertion core 11 after plated film, for light-receiving assembly actual transmissions application wavelength, it may be achieved this wave-length coverage anti-reflection, can improve optical responsivity and the sensitivity of light-receiving assembly.
The coating process reliability that the program adopts is high, is suitable for batch production, does not affect the assembling components technique after lock pin plated film simultaneously completely, effectively controls assembly cost.
Such as Fig. 1, during this light-receiving assembling components, carry out according to following steps:
1, for the optical adapter 1 with ceramic insertion core, the angled end-face of its ceramic insertion core 11 carries out plated film；
2, the above-mentioned optical adapter 1 with ceramic insertion core completes photoelectric coupling with TO-CAN assembly 2；
3, after above-mentioned coupling completes, laser welding process is adopted to carry out assembling fixing.
The foregoing is only preferred embodiment of the present utility model; not in order to limit this utility model; all within spirit of the present utility model and principle, any amendment of making, equivalent replacement, improvement etc., should be included within protection domain of the present utility model.
Claims (5)
1. the light-receiving assembly possessing OTDR wavelength filtering function, it is characterised in that described light-receiving assembly includes an optical adapter with ceramic insertion core and an assembly, concrete:
The end face of the ceramic insertion core of the side that the described optical adapter with ceramic insertion core is connected with described assembly is angled end-face, described angled end-face is coated with the optical signal of transmissive actual transmissions data, and can make OTDR luminous reflectance or absorbed thin film；
Described assembly includes the optical receiving circuit being made up of PD chip and TIA chip；Or, described assembly includes the optical receiving circuit being made up of APD chip and TIA chip.
2. light-receiving assembly according to claim 1, it is characterised in that the wavelength of optical signal of described thin film institute transmission ranges for 1500～1570nm, and the OTDR optical wavelength range that described thin film is reflected or absorbs is 1610～1670nm.
3. light-receiving assembly according to claim 1 and 2, it is characterised in that the angle in described angled end-face and the face being perpendicular to described ceramic insertion core centrage is 6～10 °.
4. light-receiving assembly according to claim 1 and 2, it is characterised in that described optical adapter with ceramic insertion core and described assembly are fixed by laser weld；Wherein, described laser weld carries out after the coupling completing described ceramic insertion core and described PD chip；Or, described laser weld carries out after the coupling completing described ceramic insertion core and described APD chip.
5. light-receiving assembly according to claim 1 and 2, it is characterised in that described assembly is specially TO-CAN assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620016698.0U CN205356351U (en) | 2016-01-07 | 2016-01-07 | Light -receiving subassembly that possesses OTDR wavelength filtering capability |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620016698.0U CN205356351U (en) | 2016-01-07 | 2016-01-07 | Light -receiving subassembly that possesses OTDR wavelength filtering capability |
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| CN205356351U true CN205356351U (en) | 2016-06-29 |
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| CN201620016698.0U Active CN205356351U (en) | 2016-01-07 | 2016-01-07 | Light -receiving subassembly that possesses OTDR wavelength filtering capability |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108040387A (en) * | 2017-09-04 | 2018-05-15 | 林铭钊 | Optical detection device and lighting device |
| CN114690341A (en) * | 2022-03-18 | 2022-07-01 | 武汉光迅科技股份有限公司 | TO packaging structure with light incoming detection function and manufacturing method thereof |
-
2016
- 2016-01-07 CN CN201620016698.0U patent/CN205356351U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108040387A (en) * | 2017-09-04 | 2018-05-15 | 林铭钊 | Optical detection device and lighting device |
| CN108040387B (en) * | 2017-09-04 | 2024-05-10 | 林铭钊 | Light detection device and illumination device |
| CN114690341A (en) * | 2022-03-18 | 2022-07-01 | 武汉光迅科技股份有限公司 | TO packaging structure with light incoming detection function and manufacturing method thereof |
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