CN202818297U - Optical network unit photoelectric device with optical time domain reflection function - Google Patents
Optical network unit photoelectric device with optical time domain reflection function Download PDFInfo
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- CN202818297U CN202818297U CN 201220356823 CN201220356823U CN202818297U CN 202818297 U CN202818297 U CN 202818297U CN 201220356823 CN201220356823 CN 201220356823 CN 201220356823 U CN201220356823 U CN 201220356823U CN 202818297 U CN202818297 U CN 202818297U
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Abstract
The utility model provides an optical network unit photoelectric device with an optical time domain reflection function, comprising a laser used for emitting upward light; a photoelectric detector used for receiving downward light; a reflection component used for reflecting an optical time domain detection signal; a first optical filter through which the upward light and all or a portion optical time domain detection signals can pass and by which the downward light can be completely reflected; a second optical filter through which the upward light and all or a portion optical time domain detection signals can pass; and an optical interface used for externally connecting an optical fiber; wherein one surface of the first optical filter is arranged towards the photoelectric detector and the optical interface, the other surface of the first optical filter is arranged towards the reflection component, one surface of the second optical filter is arranged towards the laser, the other surface of the second optical filter is arranged towards the reflection component, one surface of the reflection component is a curved reflection surface and the curved reflection surface is arranged towards the second optical filter. The optical network unit photoelectric device integrates a reflection component with an optical time domain detection signal reflection function with an optical assembly, thereby increasing product qualification rate and product reliability and reducing product size.
Description
Technical field
The utility model relates to technical field of optical fiber communication, particularly relates to a kind of optical network unit photoelectric device with time domain reflection function.
Background technology
In recent years, based on FTTx(FTTH, the FTTB of optical fiber communication, FTTC etc.) broadband network relies on it can be for the user provide voice, data and Video service at a high speed, and be able to fast development.But operator is to user's supervision and the detection and localization of optical network link case point, contradiction.At present, in the process that the optical network unit (ONU) as user side is detected, mainly be to identify by user's data traffic as the optical line terminal (OLT) of local side, can not locate accurately and monitor the user.And optical time domain reflectometer (OTDR) adopts the method for time domain measurement, emission has the light pulse of certain wavelength and injects tested optical fiber, then by the Rayleigh scattering returned in the detection fiber and the Fresnel reflection optical signal power distribution curve along time shaft, can find out the physical characteristics such as the length of tested optical fiber and loss.Simultaneously, utilize the powerful data analysis function of optical time domain reflectometer, can also realize accurately location to the case point in the optical fiber link and fault point; Also can form database in the future operator's on-line monitoring test, be convenient in the maintenance fibre circuit is carried out true of quality and trouble shoot etc.Therefore, utilizing optical time domain reflectometer that detection and location are carried out in the fault point in the fibre circuit and user side, is the test mode that generally adopts at present.But, existing user side module, reflection to the OTDR detection signal of local side on designs does not explicitly call for, device is unfixing and clear and definite to the reflection of OTDR detection signal, therefore accidentalia when the different user end depends on device package fully to its OTDR detection signal reflection power, causes most of monitoring and line fault to judge inaccurate, error is large, the situation such as erroneous judgement often occurs and fail to judge.In order to realize that optical communication network system is carried out Real Time Monitoring, need to adopt the monitoring of OTDR time domain reflection technology and location optical-fiber network breakpoint.In order to realize this technology, traditional approach is to utilize merely traditional optically flat filter to realize the reflection and transmission of multi-wavelength signals.Its shortcoming is, realizes the reflection and transmission of multi-wavelength will causing the plated film complexity of Thin Film Filter sharply to increase at single filter, and when cost increased, reflection and transmission efficient also was affected; If adopt the combining form of filter, the optical assembly construction packages already becomes increasingly complex, and affects the miniaturization of device, affects simultaneously fabrication yield and the reliability of whole optical assembly.
Summary of the invention
The utility model embodiment provides a kind of optical network unit photoelectric device with time domain reflection function, to solve the problem that the optical assembly rate of finished products is low, reliability is low in the prior art, realize improving rate of finished products and the reliability of the optical network unit photoelectric device with time domain reflection function, and dwindle the volume of the optical network unit photoelectric device with time domain reflection function.
The utility model provides a kind of optical network unit photoelectric device with time domain reflection function, comprising: be used for launching up light laser, be used for receiving descending light photodetector, be used for reverberation time domain detection signal reflection part, be used for to the complete transmission of up light descending light is reflected fully and to the first filter of all or part of transmission of light time territory detection signal, be used for the complete transmission of up light the second filter of all or part of transmission of light time territory detection signal and the optical interface that is used for external optical fiber; Described the first filter and described the second filter plate are obliquely installed, one surface of described the first filter is towards described photodetector and described optical interface, another surface of described the first filter is towards described reflection part, one surface of described the second filter is towards described laser, another surface of described the second filter is towards described reflection part, one surface of described reflection part is curved-surface reflection side, and described camber reflection is facing to described the second filter.
The optical network unit photoelectric device with time domain reflection function that the utility model provides, reflection part by integrated reflection function to light time territory detection signal in optical assembly, and a surface of reflection part is set to curved-surface structure, the curved-surface structure of reflection part has the ability that converges light time territory detection signal, can strengthen the energy of light time territory detection signal back light network, avoided utilizing merely the filter technology on plane to realize the plated film complexity that the reflection and transmission of multi-wavelength signals exists, cost increases, original up and downlink optical signal is subjected to the problem of certain influence, improve rate of finished products and the reliability of the optical network unit photoelectric device with time domain reflection function, and dwindled the volume of the optical network unit photoelectric device with time domain reflection function.
Aforesaid optical network unit photoelectric device with time domain reflection function, the optical axis of described laser and the optical axis of described optical interface are located along the same line, angle between the optical axis of described the first filter and described optical interface is 45 degree, and the angle between the optical axis of described the second filter and described laser is 45 degree.
Aforesaid optical network unit photoelectric device with time domain reflection function, the optical axis of described photodetector is vertical with the optical axis of described laser.
Aforesaid optical network unit photoelectric device with time domain reflection function also is provided with between described the first filter and described the second filter and the described reflection part for to the whole transmissions of light time territory detection signal or part transmission and the 3rd filter that the stray light signal is reflected fully.
Aforesaid optical network unit photoelectric device with time domain reflection function is provided with between described the first filter and the described photodetector for to the complete transmission of descending light and to light time territory detection signal and the 4th filter that disturbs lightwave signal to reflect fully.
Aforesaid optical network unit photoelectric device with time domain reflection function, described the first filter, described the second filter, described the 3rd filter and described the 4th filter are the wavelength division multiplexing filter.
Aforesaid optical network unit photoelectric device with time domain reflection function, described the 4th filter is vertical with the optical axis of described photodetector.
Aforesaid optical network unit photoelectric device with time domain reflection function, the wavelength of the uplink optical signal of described laser emission is 1260nm-1360nm; The wavelength of the downlink optical signal that described photodetector receives is 1480nm-1500nm; The wavelength of territory detection signal of described light time is 1615nm-1665nm.
Aforesaid optical network unit photoelectric device with time domain reflection function also comprises metal-back; Described the first filter, described the second filter, described the 3rd filter and described the 4th filter are arranged in the described metal-back, and described laser, described photodetector and described optical interface are installed on the described metal-back.
Aforesaid optical network unit photoelectric device with time domain reflection function, described reflection part and described photodetector are fixed on the described metal-back by insulating cement respectively.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do one to the accompanying drawing of required use in embodiment or the description of the Prior Art and introduce simply, apparently, accompanying drawing in the following describes is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation that the utlity model has the optical network unit photoelectric device embodiment of time domain reflection function;
Fig. 2 is the light path principle figure one that the utlity model has the optical network unit photoelectric device embodiment of time domain reflection function;
Fig. 3 is the light path principle figure two that the utlity model has the optical network unit photoelectric device embodiment of time domain reflection function.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model embodiment clearer, below in conjunction with the accompanying drawing among the utility model embodiment, technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
Fig. 1 is the structural representation that the utlity model has the optical network unit photoelectric device embodiment of time domain reflection function; Fig. 2 is the light path principle figure one that the utlity model has the optical network unit photoelectric device embodiment of time domain reflection function; Fig. 3 is the light path principle figure two that the utlity model has the optical network unit photoelectric device embodiment of time domain reflection function.As shown in Figure 1-Figure 3, present embodiment has the optical network unit photoelectric device of time domain reflection function, comprising: be used for launching up light laser 1, be used for receiving descending light photodetector 3, be used for reverberation time domain detection signal reflection part 8, be used for to the complete transmission of up light descending light is reflected fully and to the first filter 5 of all or part of transmission of light time territory detection signal, be used for the complete transmission of up light the second filter 2 of all or part of transmission of light time territory detection signal and the optical interface 6 that is used for external optical fiber; The first filter 5 and the second filter plate 2 are obliquely installed, one surface of the first filter 5 is towards photodetector 3 and optical interface 6, another surface of the first filter 5 is towards reflection part 8, one surface of the second filter 2 is towards laser 1, another surface of the second filter 2 is towards reflection part 8, one surface of reflection part 8 is curved-surface reflection side, and camber reflection is facing to the second filter 2.
Particularly, the optical network unit photoelectric device that present embodiment has time domain reflection function is incorporated into inside by optical interface 6 with light time territory detection signal, light time territory detection signal is transmitted on the second filter 2 through the first filter 5, reflexed to reflection part 8 by the second filter 2, after being reflected parts 8 reflections, again by 2 reflections of the second filter, return in the external optical fiber 9 by described optical interface 6 through the first filter 5, and then enter optical-fiber network, in the optical line terminal under transferring to, realize the detection and localization to this optical network unit.The first filter 5 in the present embodiment and the second filter 2 all have the characteristic to the complete transmission of up light, up light by laser 1 emission will pass through the second filter 2 and the first filter 5 successively, just in time the optical axis along optical interface 6 enters optical interface 6, enters optical-fiber network by optical fiber 9.Simultaneously, the first filter 5 has the characteristic that descending light is reflected fully, from the descending light of optical interface 6 outgoing by 5 reflections of the first filter after just along the optical axis directive photodetector 3 of photodetector 3, to realize the accurate reception of 3 pairs of downlink optical signals of photodetector.The ability that the curved-surface reflection side of the reflection part 8 in the present embodiment has reflection and converges; reflection part 8 is except the shape of reflecting curved surface; the design of reflection part 8 can be changed according to needs; a kind of scheme that provides in this example is not the restriction to its global shape; adopt other global shapes; as long as have reflecting curved surface, all belong to protection range of the present utility model.And optical interface 6 can adopt SC plug-type or LC plug-type as the public input/output end port of optical device, and any also or in SC/PC tail fiber type or the SC/APC tail fiber type to be connected with the light mouth of external network, realized the single fiber bi-directional transfer function.
Wherein, the optical axis of the laser 1 in the present embodiment and the optical axis of optical interface 6 are located along the same line, and the angle between the optical axis of the first filter 5 and optical interface 6 is 45 degree, and the angle between the optical axis of the second filter 2 and laser 1 is 45 degree.Concrete, in order to make things convenient for the topology layout of each device, the optical axis of the laser 1 in the present embodiment is vertical with the optical axis of reflection part 8, the optical axis of the first filter 5 and laser 1 acutangulated be designed to 45 and spend, simultaneously, the optical axis of laser 1 is vertical with the optical axis of photodetector 3, the optical axis of the second filter 2 and laser 1 is acutangulated be designed to 45 and spend.
As shown in Figure 2, the light time territory detection signal of the second filter 2 reflections in the present embodiment can directly enter into reflection part 8, and simultaneously, the first filter 5 can reflect the stray light signal fully, makes it can't arrive reflection part 8.Perhaps, as shown in Figure 3, can also be provided with between the reflection part 8 in the present embodiment and the second filter 2 for to the whole transmissions of light time territory detection signal or part transmission and the 3rd filter 7 that the stray light signal is reflected fully.At this moment, the first filter 5 also can be all or transmissive portion stray light signal, the stray light signal sees through the first filter 5 and is mapped to the second filter 2, the stray light signal will be by 2 reflections of the second filter to reflection part 8, stray light signal on the reflection part 8 will be reflected parts 8 and return, and again by the reflection of the second filter 2, through the first filter 5, back light interface 6 and then return optical fiber 9.
Further, consider by optical interface 6 and enter light signal in the optical network unit photoelectric device that present embodiment has time domain reflection function except the downlink optical signal of optical line terminal emission, also having light time territory detection signal and wavelength is the interference lightwave signal of 1550nm-1560nm, crosstalk in order to reduce, improve the antijamming capability of photodetector 3, Effective Raise photodetector 3 receives the sensitivity of downlink optical signals, is provided with between the first filter 5 in the present embodiment and the second filter 2 and the photodetector 3 for to the complete transmission of descending light and the 4th filter 4 that light time territory detection signal and interference lightwave signal are reflected fully.Concrete, the 4th filter 4 in the present embodiment has to the complete transmission of descending light, to light time territory detection signal and the characteristic of disturbing lightwave signal to reflect fully.The 4th filter 4 is arranged between the first filter 5 and the photodetector 3, and the reflecting surface of the 4th filter 4 is preferably vertical with the optical axis direction of photodetector 3.So, both can guarantee by the reflection of the first filter 5 descending light just vertical sand shooting, incide in the photodetector 3 along the optical axis of photodetector 3 after its energy is seen through fully by the 4th filter 4 to the 4th filter 4 surfaces; Simultaneously, can avoid interference lightwave signal and be injected in the photodetector 3 disturbing lightwave signal by the 4th filter 4 surface reflections again, to improve the reception conversion accuracy of 3 pairs of downlink optical signals of photodetector.Wherein, the first filter 5 in the present embodiment, the second filter 2, the 3rd filter 7 and the 4th filter 4 can be the wavelength division multiplexing filter.
Further again, the wavelength of the uplink optical signal of laser 1 emission in the present embodiment is 1260 nm-1360nm; The wavelength of the downlink optical signal that photodetector 3 receives is 1480 nm-1500nm; The wavelength of light time territory detection signal is 1615 nm-1665nm.Concrete, selects every section representative value in the lightwave signal section, be respectively 1310nm, the 1490nm in the downlink optical signal, light time territory in uplink optical signal 1650nm, the 1550nm in the interference lightwave signal in detecting number.The below will describe with the lightwave signal of these several typical wavelengths.The uplink optical signal of the 1310nm wavelength of laser 1 emission, transmit from left to right along horizontal optical axis, at first through the second filter 2, after its energy is seen through fully by the second filter 2, enter again the first filter 5, then its energy enters optical interface 6 after being seen through fully by the first filter 5, by entering the exterior light network with the external optical fiber 9 of optical interface 6.Enter 1490nm, the 1550nm of photoelectric device and the light signal of 1650nm wavelength by the exterior light network, incide first the surface of the first filter 5 through optical interface 6 along horizontal optical axis.The energy of 1490nm wavelength light signal is reflected fully by the first filter 5, and photodetector 3 is front through the 4th filter 4 arriving.The 4th filter 4 all returns the stray light signal beyond the 1490nm wavelength light signal, enters photodetector 3 to prevent it, improves the isolation to crosstalk signal; Simultaneously 1490nm wavelength light signal is all seen through, make it enter photodetector 3, realize reception and conversion to light signal.The energy that 1650nm light time territory is detected number is by the 5 all or part of transmissions of the first filter, arrive the second filter 2, by the second filter 2 all or part of reflection directive reflection parts 8, reflection part 8 is front through the 3rd filter 7 arriving, all or part of the 3rd filter 7 that sees through, arrive reflection part 8, be reflected parts 8 and be reflected back, through the 3rd filter 7, after 2 reflections of the second filter, through the first filter 5, enter the exterior light network through optical interface 6 again.The stray light signal of 1550nm can all be reflected by the first filter 5, directive photodetector 3, and photodetector 3 is front by 4 reflections of the 4th filter arriving; Also can all or part ofly pass through the first filter 5, by all or part of reflection directive reflection part 8, reflection part 8 is front by 7 reflections of the 3rd filter arriving on the second filter 2 surfaces.
Further, the optical network unit photoelectric device of present embodiment with time domain reflection function can also comprise metal-back 10; The first filter 5, the second filter 2, the 3rd filter 7 and the 4th filter 4 are arranged in the metal-back 10, and laser 1, photodetector 3 and optical interface 6 are installed on the metal-back 10.Preferably, the reflection part 8 in the present embodiment is fixed on the metal-back 10 by insulating cement 11, and photodetector 3 is fixed on the metal-back 10 by insulating cement 12.
Present embodiment has the optical network unit photoelectric device of time domain reflection function, reflection part by integrated reflection function to light time territory detection signal in optical assembly, and a surface of reflection part is set to curved-surface structure, the curved-surface structure of reflection part has the ability that converges light time territory detection signal, can strengthen the energy of light time territory detection signal back light network, avoided utilizing merely the filter technology on plane to realize the plated film complexity that the reflection and transmission of multi-wavelength signals exists, cost increases, original up and downlink optical signal is subjected to the problem of certain influence, improve rate of finished products and the reliability of the optical network unit photoelectric device with time domain reflection function, and dwindled the volume of the optical network unit photoelectric device with time domain reflection function.Present embodiment has the optical network unit photoelectric device of time domain reflection function in the optical network unit single-fiber bidirectional photoelectric device various functions of realizing user side, can effectively realize the reflection function of optical time domain reflectometer with light time domain detection signal, compare the optical network unit single-fiber bidirectional photoelectric device of existing user side, have accurate, simple to operate, the cheap characteristics of light time territory detection signal reflection, can make local side the optical network unit user of user side be realized the fault detection capability of in real time accurately on-line monitoring and optical link.
It should be noted that at last: above embodiment only in order to the technical solution of the utility model to be described, is not intended to limit; Although with reference to previous embodiment the utility model is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (10)
1. optical network unit photoelectric device with time domain reflection function, it is characterized in that, comprising: be used for launching up light laser, be used for receiving descending light photodetector, be used for reverberation time domain detection signal reflection part, be used for to the complete transmission of up light descending light is reflected fully and to the first filter of all or part of transmission of light time territory detection signal, be used for the complete transmission of up light the second filter of all or part of transmission of light time territory detection signal and the optical interface that is used for external optical fiber; Described the first filter and described the second filter plate are obliquely installed, one surface of described the first filter is towards described photodetector and described optical interface, another surface of described the first filter is towards described reflection part, one surface of described the second filter is towards described laser, another surface of described the second filter is towards described reflection part, one surface of described reflection part is curved-surface reflection side, and described camber reflection is facing to described the second filter.
2. the optical network unit photoelectric device with time domain reflection function according to claim 1, it is characterized in that, the optical axis of described laser and the optical axis of described optical interface are located along the same line, angle between the optical axis of described the first filter and described optical interface is 45 degree, and the angle between the optical axis of described the second filter and described laser is 45 degree.
3. the optical network unit photoelectric device with time domain reflection function according to claim 2 is characterized in that the optical axis of described photodetector is vertical with the optical axis of described laser.
4. the optical network unit photoelectric device with time domain reflection function according to claim 1, it is characterized in that, also be provided with between described the first filter and described the second filter and the described reflection part for to the whole transmissions of light time territory detection signal or part transmission and the 3rd filter that the stray light signal is reflected fully.
5. the optical network unit photoelectric device with time domain reflection function according to claim 4, it is characterized in that, be provided with between described the first filter and the described photodetector for to the complete transmission of descending light and to light time territory detection signal and the 4th filter that disturbs lightwave signal to reflect fully.
6. the optical network unit photoelectric device with time domain reflection function according to claim 5 is characterized in that, described the first filter, described the second filter, described the 3rd filter and described the 4th filter are the wavelength division multiplexing filter.
7. the optical network unit photoelectric device with time domain reflection function according to claim 5 is characterized in that, described the 4th filter is vertical with the optical axis of described photodetector.
8. the optical network unit photoelectric device with time domain reflection function according to claim 1 is characterized in that, the wavelength of the uplink optical signal of described laser emission is 1260 nm-1360nm; The wavelength of the downlink optical signal that described photodetector receives is 1480 nm-1500nm; The wavelength of territory detection signal of described light time is 1615 nm-1665nm.
9. the optical network unit photoelectric device with time domain reflection function according to claim 5 is characterized in that, also comprises metal-back; Described the first filter, described the second filter, described the 3rd filter and described the 4th filter are arranged in the described metal-back, and described laser, described photodetector and described optical interface are installed on the described metal-back.
10. the optical network unit photoelectric device with time domain reflection function according to claim 9 is characterized in that, described reflection part and described photodetector are fixed on the described metal-back by insulating cement respectively.
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| CN 201220356823 CN202818297U (en) | 2012-07-23 | 2012-07-23 | Optical network unit photoelectric device with optical time domain reflection function |
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| CN 201220356823 CN202818297U (en) | 2012-07-23 | 2012-07-23 | Optical network unit photoelectric device with optical time domain reflection function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103268003A (en) * | 2013-05-24 | 2013-08-28 | 青岛海信宽带多媒体技术有限公司 | Photoelectronic device based on wavelength division multiplexing |
| CN103338070A (en) * | 2013-06-17 | 2013-10-02 | 苏州优康网络电子商务有限公司 | Reflection function type optical network phototube equipment |
-
2012
- 2012-07-23 CN CN 201220356823 patent/CN202818297U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103268003A (en) * | 2013-05-24 | 2013-08-28 | 青岛海信宽带多媒体技术有限公司 | Photoelectronic device based on wavelength division multiplexing |
| CN103268003B (en) * | 2013-05-24 | 2015-03-04 | 青岛海信宽带多媒体技术有限公司 | Photoelectronic device based on wavelength division multiplexing |
| CN103338070A (en) * | 2013-06-17 | 2013-10-02 | 苏州优康网络电子商务有限公司 | Reflection function type optical network phototube equipment |
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