CN203164477U - Optical network unit three-way optical component with optical time domain signal reflection function - Google Patents

Optical network unit three-way optical component with optical time domain signal reflection function Download PDF

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Publication number
CN203164477U
CN203164477U CN 201220551828 CN201220551828U CN203164477U CN 203164477 U CN203164477 U CN 203164477U CN 201220551828 CN201220551828 CN 201220551828 CN 201220551828 U CN201220551828 U CN 201220551828U CN 203164477 U CN203164477 U CN 203164477U
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China
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optical
optical filter
filter
light
signal
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邹翔
宋琛
张华�
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Hisense Broadband Multimedia Technology Co Ltd
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Hisense Broadband Multimedia Technology Co Ltd
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Abstract

The utility model discloses an optical network unit three-way optical component with an optical time domain signal reflection function. First, second, third and fourth filters transmit an uplink light which is emitted by a laser and comes to an optical interface through first and second filters to an optical fiber, and transmit a downlink light which is received by the optical interface and comprises a digital optical signal or an analog optical signal to a first or second photoelectric detector through corresponding filters in first, second, third and fourth filters. Optical time domain detection signals which are received by the light interface are reflected or transmitted by the second filter, are converged and reflected to the second or the first filter by the third filter or the fourth filter, and are transmitted to the optical interface through the second filter, wherein the third filter or the fourth filter has a concave surface. Due to the fact that the filters which converge and reflect the optical time domain detection signals and are of curved surface structure, the energy for the optical time domain detection signals to return to an optical network is enhanced, and the problems of complicated coating, increased cost, influenced uplink and downlink optical signals and weak optical time domain detection signal reflection, which are caused by flat filters, are avoided.

Description

Optical network unit three-dimensional optical assembly with light time territory signal reflex function
Technical field
The utility model relates to technical field of optical fiber communication, particularly relates to a kind of optical network unit three-dimensional optical assembly with light time territory signal reflex 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, and contradiction becomes increasingly conspicuous.At present, in the process that the optical network unit (ONU) as user side is detected, mainly be to identify by the user's data flow as the optical line terminal (OLT) of local side, can not carry out accurate in locating and monitoring to the user.And light time territory signal reflex meter (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 physical characteristicss such as the length of tested optical fiber and loss.Simultaneously, utilize light time territory signal reflex meter powerful data analysis function, can also realize accurately location to the case point in the optical fiber link and trouble spot; Also can form database for the test of operator's on-line monitoring in the future, be convenient in the maintenance fibre circuit is carried out true of quality and troubleshooting etc.Therefore, utilizing light time territory signal reflex meter that detection and location are carried out in the trouble spot in the fibre circuit and user side, is the developing direction of optical-fiber network.
Single fiber three-way ONU optical assembly also has the function of receiver, video simulating signal when having common ONU function.It is to realize one of needed Primary Component in phone, CATV (cable television) and this target of online " unification of three nets ".
In order to realize the OTDR function, traditional approach is to utilize traditional optically flat filter to realize reflection and the transmission of multi-wavelength signals merely.Its shortcoming is: traditional optically flat filter does not converge the ability of light signal.If the optical filter of reflected light time-domain signal is arranged on the position near optical interface, need take into account reflection and the perspective of multi-wavelength, cause the plated film complicacy sharply to increase.If the optical filter of reflected light time-domain signal is arranged on the position away from optical interface, the light time territory signal energy of reflected back is with deficiency.
The utility model content
The purpose of this utility model provides a kind of single fiber optical network unit three-dimensional optical assembly, has the OTDR function, does not increase the volume of optical assembly simultaneously, makes the three-dimensional optical assembly can be good at incorporating among the existing optical-fiber network.
According to an aspect of the present utility model, a kind of optical network unit three-dimensional optical assembly with light time territory signal reflex function is provided, comprise: be used for the up light of emission laser instrument, receive descending light digital optical signal first photodetector and receive second photodetector, first to fourth optical filter of the analog optical signal in the descending light and be used for external optical fiber to transmit the optical interface of up light and descending light and light time territory detection signal, wherein
The one side of first optical filter is towards described laser instrument, and another side, reflects the digital optical signal the descending light that receives from optical interface the complete transmission of emission light signal that laser instrument sends fully towards first photodetector and optical interface;
The one side of second optical filter is towards described laser instrument and first photodetector, another side is towards second photodetector and optical interface, to the described complete transmission that transmits, to the complete transmission of digital optical signal in the described descending light, the analog optical signal in the described descending light is reflected fully;
The one side of the 3rd optical filter is towards second photodetector, and another side is towards second optical filter;
The one side of the 4th optical filter is towards first photodetector, and another side will be transmitted through first photodetector from the digital optical signal that the reflection of first optical filter comes fully towards first optical filter and second optical filter;
The light time territory detection signal that the second optical filter reflected light interface receives;
The 3rd optical filter is concave curved surface towards the face of second optical filter, the analog optical signal that comes from the reflection of second optical filter is transmitted through second photodetector fully, and will after the light time territory detection signal that the reflection of second optical filter comes is assembled and reflex on second optical filter, enters described optical interface.
Wherein, the 3rd optical filter reflexes to second optical filter fully with territory detection signal of described light time, and second optical filter should reflex to described optical interface by light time territory detection signal, and the intensity that reflexes to the laggard light time territory detection signal of going into optical fiber of described optical interface from second optical filter is at least 10% of the intensity of the light time territory detection signal that enters optical network unit three-dimensional optical assembly from described optical interface.
According to another aspect of the present utility model, a kind of optical network unit three-dimensional optical assembly with light time territory signal reflex function is provided, comprise: be used for the up light of emission laser instrument, receive first photodetector of descending light digital optical signal and receive second photodetector, first to fourth optical filter of the analog optical signal in the descending light and be used for external optical fiber to transmit the optical interface of up light and descending light and light time territory detection signal, wherein
The one side of first optical filter is towards described laser instrument, and another side is towards first photodetector and optical interface, the complete transmission of emission light signal that laser instrument is sent;
The one side of second optical filter is towards described laser instrument and first photodetector, another side is towards second photodetector and optical interface, to the described complete transmission that transmits, to the complete transmission of digital optical signal in the described descending light, the analog optical signal in the described descending light is reflected fully;
The one side of the 3rd optical filter is towards second photodetector, and another side will be transmitted through second photodetector from the analog optical signal that the reflection of second optical filter comes fully towards second optical filter;
The one side of the 4th optical filter is towards first photodetector, and another side is towards first optical filter and second optical filter;
The light time territory detection signal that the second optical filter transmitted light interface receives and from digital optical signal to the first optical filter in the descending light of optical interface, first optical filter reflects territory detection signal of described light time and reflects described digital optical signal fully;
The 4th optical filter is concave curved surface towards the face of first and second optical filters, to be transmitted through first photodetector fully from the digital optical signal that first optical filter reflection comes, and will assemble and reflex to from the light time territory detection signal that the reflection of first optical filter comes and enter described optical interface after first optical filter and transmission are crossed on second optical filter.
Wherein, the 4th optical filter reflexes to first optical filter fully with territory detection signal of described light time, and transmission was crossed second optical filter and is entered described optical interface after first optical filter will reflex to second optical filter from the light time territory detection signal that the 4th optical filter reflects, from first optical filter reflection and transmission through the intensity that enters the light time territory detection signal of optical fiber through optical interface second optical filter after be from described optical interface enter optical network unit three-dimensional optical assembly light time territory detection signal intensity at least 10%.
Wherein, the wavelength of described light time territory detection signal is 1600nm-1665nm.
Wherein, the angle of first optical filter between the direction that the optical axis of the outside normal direction by this surface on the surface of laser instrument and laser instrument extends toward optical interface is about 135 degree, and second optical filter 6 is about 45 to spend towards the optical axis of the outside normal direction by this surface on the surface of optical interface and laser instrument toward the angle between the direction of optical interface extension.
Wherein, the optical axis of the optical axis of described laser instrument and described optical interface is located along the same line substantially; The optical axis of first photodetector is vertical substantially with the optical axis of described laser instrument; The optical axis of described second photodetector is vertical substantially with the optical axis of described laser instrument.
Described optical network unit optical assembly also comprises: betal can; First optical filter, second optical filter, the 3rd optical filter and the 4th optical filter are arranged in the described betal can, and described laser instrument, first and second photodetectors and described optical interface are installed on the described betal can.
In the optical network unit three-dimensional optical assembly with light time territory signal reflex function of the present utility model, because the optical filter on plane is replaced with the optical filter with curved-surface structure, make this optical filter have the convergence reflex function to light time territory detection signal, strengthened the energy of light time territory detection signal back light network, avoided utilizing merely the optical filter technology on plane to realize the reflection of multi-wavelength signals and the plated film complexity that transmission exists, cost increases, original up and downlink optical signal is subjected to certain influence, the more weak problem of light time territory detection signal reflection, improve yield rate and the reliability of the optical network unit three-dimensional optical assembly with light time territory signal reflex function, and do not increased the volume of former three-dimensional optical assembly.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply, apparently, accompanying drawing in describing below is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is according to the structural representation with optical network unit three-dimensional optical assembly of light time territory signal reflex function of the present utility model.
Fig. 2 is the light path principle figure according to the optical network unit three-dimensional optical assembly with light time territory signal reflex function of an embodiment of the present utility model.
Fig. 3 is the light path principle figure according to the optical network unit three-dimensional optical assembly with light time territory signal reflex function of another embodiment of the present utility model.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the utility model is further described.
Passive optical network PON (Passive Optical Network) technology be a kind of typical point to the access technology of multiple spot, formed by the optical line terminal OLT of local side, optical network unit ONU and the Optical Distribution Network ODN of user side.In a PON system, generally only comprise an optical line terminal OLT that is installed in the console for centralized control.The descending light of optical line terminal OLT emission transfers to respectively in the optical network unit ONU at different levels by optical fiber by behind the ODN demultiplexing light signal.Optical network unit ONU is installed on customer site.A customer site need be installed an ONU, receives the descending light that OLT sends, and returns up light to OLT.
OLT and ONU need to use photoelectric device to realize mutual conversion between electric signal and the light signal.In the utility model, integrated wavelength-division multiplex element for reflected light time domain detection signal in existing ONU photoelectric device is realized the single fiber bi-directional transmission of uplink optical signal, downlink optical signal and light time territory detection signal.Therefore, under the prerequisite of guaranteeing the light signal proper communication, have the OTDR function, thereby realized the function of system's local side OLT to real-time online detection, monitoring and the localization of fault of whole optical network unit ONU.Utilize photoelectric device of the present utility model, solved the problem that the prior art consistance is poor, accuracy is low, can also solve the miniaturization issues of optical module, the closeness of increase equipment.
In the utility model, the optical network unit three-dimensional optical assembly with light time territory signal reflex function comprises laser instrument, first to fourth optical filter, first and second photodetectors and optical interface.Wherein, the first to fourth optical filter up light of finishing laser instrument emission through first and second optical filters to optical interface enter the transmission of optical fiber and the respective filter of descending light through first to fourth optical filter that comprises digital optical signal or analog optical signal that receive from optical interface to the transmission of first or second photodetector.The light time territory detection signal that the reflection of second optical filter or transmitted light interface receive.The one side of the 3rd or the 4th optical filter is concave curved surface, has the 3rd optical filter or the convergence of the 4th optical filter of concave curved surface and reflexes to second or first optical filter, and be transferred in the optical interface through second optical filter.
Fig. 1 is according to the structural representation with optical network unit three-dimensional optical assembly of light time territory signal reflex function of the present utility model.Fig. 2 is the light path principle figure of the optical network unit three-dimensional optical assembly with light time territory signal reflex function of an embodiment of the present utility model.As illustrated in fig. 1 and 2, optical network unit three-dimensional optical assembly with light time territory signal reflex function comprises: the laser instrument 1 that is used for the up light of emission, the photodetector 2 that is used for the digital optical signal of the descending light of reception, the photodetector 3 that is used for the analog optical signal of the descending light of reception, the optical interface 4 that is used for external optical fiber, and first optical filter 5, second optical filter 6, the 3rd optical filter 7 and the 4th optical filter 8.First optical filter, 5 one sides are towards laser instrument 1, and another side is towards the photodetector 2 and the optical interface 4 that receive digital optical signal; Second optical filter, 6 one sides are towards the photodetector 2 of laser instrument 1 and reception digital optical signal, and another side is towards the photodetector 3 and the optical interface 4 that receive analog optical signal; The 3rd optical filter 7 one sides are towards the photodetector 3 that receives analog optical signal, and another side is towards second optical filter 6; The 4th optical filter one side is towards the photodetector 2 that receives digital optical signal, and another side is towards first optical filter 5 and second optical filter 6.The complete transmission of first optical filter, 5 pairs of emissions light signal is reflected fully to the digital optical signal that receives; The complete transmission of second optical filter, 6 pairs of emissions light signal to the complete transmission of digital optical signal that receives, is reflected fully to the analog optical signal that receives; The complete transmission of analog optical signal of 7 pairs of receptions of the 3rd optical filter, and other light signals are reflected fully; The complete transmission of digital optical signal of 8 pairs of receptions of the 4th optical filter is reflected fully to the analog optical signal that receives, and also other light signals is reflected fully.
Among the embodiment shown in Figure 2, second optical filter 6 and the 3rd optical filter 7 are the optical filters for reflected light time domain detection signal.The 3rd optical filter 7 is concave curved surface towards the surface of second optical filter 6, to being transmitted through photodetector 3 fully from optical interface and through the analog optical signal of second optical filter reflection, and to assembling and reflection fully from optical interface and through the light time territory detection signal of second optical filter reflection.Particularly, optical network unit three-dimensional optical assembly with light time territory signal reflex function is incorporated into optical network unit three-dimensional optical assembly inside by optical interface 4 with light time territory detection signal, light time territory detection signal reflexes on the concave curved surface of the 3rd optical filter 7 through second optical filter 6, after 7 reflection of the 3rd optical filter and converging, again reflex on second optical filter 6, reflexed to optical interface 4 by second optical filter 6 more at last, and by in the described optical interface 4 returning to external optical-fiber networks, in the optical line terminal under transferring to, realize the detection and localization to the optical network unit at this optical network unit three-dimensional optical assembly place.From the 3rd optical filter 7 convergence reflexs to second optical filter 6 and by second optical filter reflect into into optical interface enter then optical fiber light time territory detection signal intensity for from optical interface incide optical network unit three-dimensional optical assembly light time territory detection signal intensity at least 10%.
Up light by laser instrument 1 emission enters optical-fiber network successively through first optical filter 5 and second optical filter 6 by optical interface 4.After digital optical signal in the descending light enters optical assembly from optical interface 4, by second optical filter 6, and by first optical filter, 5 reflections the 4th optical filter 8, and transmission receives the photodetector 2 of digital optical signal by the 4th optical filter 8 directives.Analog optical signal in the descending light is reflexed to the 4th optical filter 8 by second optical filter 6 after entering optical assembly from optical interface 4, and transmission receives the photodetector 3 of analog optical signal by the 3rd optical filter 7 directives.
In the present embodiment, the optical axis of the optical axis of laser instrument 1 and optical interface 4 is located along the same line substantially.Referring to Fig. 2, with the optical axis of laser instrument 1 also be optical interface 4 optical axis direction from left to right in other words the optical axis of laser instrument 1 direction of extending toward optical interface be directions X in the Cartesian coordinates, from bottom to top the direction vertical with the optical axis of laser instrument 1 is the Y-direction in the Cartesian coordinates.The angle of first optical filter 5 between the direction that the optical axis of the outside normal direction by this surface on the surface of laser instrument and laser instrument 1 extends toward optical interface 4 is about 135 degree, and second optical filter 6 is about 45 to spend towards the optical axis of the outside normal direction by this surface on the surface of optical interface 4 and laser instrument 1 toward the angle between the direction of optical interface 4 extensions.For ease of the topology layout of each device, in the present embodiment, the optical axis of laser instrument 1 is vertical substantially with the optical axis of the photodetector 2 that receives digital optical signal; Simultaneously, the optical axis of laser instrument 1 is vertical substantially with the optical axis of the photodetector 3 that receives analog optical signal.The 3rd optical filter 7 towards the side of second optical filter 6 for having curved-surface structure.In the present embodiment, the 3rd optical filter is concave curved surface towards the face of second optical filter 6, and its axis is substantially parallel with the optical axis of the photodetector 3 that receives analog optical signal; The normal of the 4th optical filter 8 is substantially parallel with the optical axis of the photodetector 2 that receives digital optical signal.
Fig. 3 is the light path principle of the three-dimensional optical assembly embodiment with light time territory signal reflex function of another embodiment of the present utility model.In the present embodiment, the same with embodiment shown in Figure 2, optical network unit three-dimensional optical assembly with light time territory signal reflex function comprises: the laser instrument 1 that is used for the up light of emission, the photodetector 2 that is used for the digital optical signal of the descending light of reception, the photodetector 3 that is used for the analog optical signal of the descending light of reception, the optical interface 4 that is used for external optical fiber, and first optical filter 5, second optical filter 6, the 3rd optical filter 7 and the 4th optical filter 8.The position of each device of each device of the optical network unit three-dimensional optical assembly of present embodiment and optical network unit shown in Figure 2 concerns and acts on basic identical.Different with the optical network unit among Fig. 2 is, in the embodiments of figure 3, the 3rd optical filter 7 is not concave curved surface towards the side of second optical filter 6, and the 4th optical filter 8 is concave curved surface towards the side of first and second optical filters.That is, the 3rd optical filter does not have the convergence reflex function to light time territory detection signal, but the 4th optical filter 8 pairs of light time territory detection signal has the convergence reflex function.Particularly, second optical filter 6 will be transmitted through first optical filter 5 from the digital optical signal in the descending light of optical interface 4 and light time territory detection signal, and will reflex to the 3rd optical filter 7 from the analog optical signal in the descending light of optical interface 4.First optical filter 5 reflexes to the back transmissions of the 4th optical filter 8 with digital optical signal and crosses the 4th optical filter 8 and enter photodetector 2.The light time territory detection signal that the 4th optical filter 8 receives from first optical filter, and light time territory detection signal carried out convergence reflex to the first optical filter 5, light time territory detection signal is reflexed to second optical filter 6 and transmission by first optical filter 5 and crosses second optical filter and enter optical interface 4 afterwards.In the present embodiment, be at least 10% of the intensity of the light time territory detection signal that enters optical network unit three-dimensional optical assembly from described optical interface from intensity first optical filter reflection and transmission enters the light time territory detection signal of optical fiber by optical interface through second optical filter.
In above-described embodiment of the present utility model, the 3rd or the 4th optical filter adopts curved surface face structure, in reflected light time domain detection signal light time territory detection signal is converged.Above-described embodiment of the present utility model is not to be that restriction has the concrete shape of curved-surface structure of light time territory detection signal being carried out the optical filter of convergence reflex function.
Optical interface 4 is as the public input/output end port of optical assembly, can adopt SC plug-type or LC plug-type, also or in SC/PC tail fiber type or SC/APC tail fiber type or the SC/LC type any to be connected with the light mouth of external network, realized the single fiber bi-directional transfer function.
Further, the wavelength of the uplink optical signal of 1 emission of the laser instrument in above-described embodiment is 1260nm-1360nm; The wavelength of the downlink optical signal that the photodetector 2 of reception digital optical signal receives is 1480nm-1500nm; The wavelength of the downlink optical signal that the photodetector 3 of reception analog optical signal receives is 1550nm-1560nm; The wavelength of light time territory detection signal is 1600nm-1665nm.Preferably, select every section representative value in the lightwave signal section, be respectively 1310nm, the 1490nm in the descending digital optical signal, the 1550nm in the descending analog optical signal in the uplink optical signal.It number can be 1610nm, 1625nm or 1650nm that the light time territory is detected.
Further, the optical network unit optical assembly with light time territory signal reflex function of embodiment of the present utility model can also comprise betal can 9.First optical filter 5, second optical filter 6, the 3rd optical filter 7 and the 4th optical filter 8 are arranged in the betal can 9, and photodetector 3 and the optical interface 4 of the photodetector 2 of laser instrument 1, receiving digital signals, reception simulating signal are fixed on the betal can 9.Preferably, the photodetector 3 of the photodetector 2 of receiving digital signals and reception simulating signal is fixed on the betal can 9 by insulating mat 10.
In the process of assembling optical network unit optical assembly, can earlier first optical filter 5, second optical filter 6, the 3rd optical filter 7 and the 4th optical filter 8 be arranged in the betal can 9.Then, it is right-hand by active coupling scheme optical interface 4 to be fixed on betal can 9.Concrete, when coupling, import light time territory detection signal light by optical interface, and by the light time territory detection signal strength that the optical interface detection of reflected is returned, after the reflection strength of light time territory detection signal reaches the requirement standard, optical interface is fixed on the betal can.Afterwards, by active coupling laser instrument 1 is fixed on the left of betal can 9, can be so that the light that laser instrument 1 sends more enter optical interface 4 during active coupling, thus guarantee the energy of uplink optical signal.Particularly, make laser instrument 1 luminous when coupling, draw and receiving optical signals from optical interface 4, accurately regulate laser instrument 1 with respect to the position of betal can 9, make that the light signal of drawing from optical interface 4 is the strongest, fix laser instrument 1 and betal can this moment.Next, the photodetector 2 that will receive digital optical signal by active coupling scheme is fixed on the below of betal can 9.Particularly, when coupling, introduce digital optical signal from optical interface 4, and receive with photodetector 2, accurately regulate photodetector 2 with respect to the position of betal can 9, the signal that makes photodetector 2 receive is the strongest, and be fixed on photodetector on the betal can this moment.Equally, according to similar mode, the photodetector 3 that will receive analog optical signal by active coupling scheme is fixed on the top of betal can 9.Active coupling can be so that digital optical signal and the simulated light sent from optical interface more enter photodetector 2 and 3, thereby guarantee that downlink optical signal can better be received.
In the optical network unit three-dimensional optical assembly with light time territory signal reflex function of the present utility model, because the optical filter on plane is replaced with the optical filter with curved-surface structure, make this optical filter have the convergence reflex function to light time territory detection signal, strengthened the energy of light time territory detection signal back light network, avoided utilizing merely the optical filter technology on plane to realize the reflection of multi-wavelength signals and the plated film complexity that transmission exists, cost increases, original up and downlink optical signal is subjected to certain influence, the more weak problem of light time territory detection signal reflection, improve yield rate and the reliability of the optical network unit three-dimensional optical assembly with light time territory signal reflex function, and do not increased the volume of former three-dimensional optical assembly.Of the present utility model have the optical network unit three-dimensional optical assembly of light time territory signal reflex function in the every function of optical network unit single fiber three-way photoelectric device that realizes user side, can effectively realize the reflection function of light time territory signal reflex meter with light time domain detection signal, compare the optical network unit single fiber three-way photoelectric device of existing user side, have to light time territory detection signal reflection accurately, simple to operate, cheap characteristics can make local side the optical network unit user of user side be realized the fault detection capability of on-line monitoring accurately in real time 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 (12)

1. optical network unit three-dimensional optical assembly with light time territory signal reflex function, comprise: be used for the up light of emission laser instrument, receive descending light digital optical signal first photodetector and receive second photodetector, first to fourth optical filter of the analog optical signal in the descending light and be used for external optical fiber to transmit the optical interface of up light and descending light and light time territory detection signal, wherein
The one side of first optical filter is towards described laser instrument, and another side, reflects the digital optical signal the descending light that receives from optical interface the complete transmission of emission light signal that laser instrument sends fully towards first photodetector and optical interface;
The one side of second optical filter is towards described laser instrument and first photodetector, another side is towards second photodetector and optical interface, to the described complete transmission that transmits, to the complete transmission of digital optical signal in the described descending light, the analog optical signal in the described descending light is reflected fully;
The one side of the 3rd optical filter is towards second photodetector, and another side is towards second optical filter;
The one side of the 4th optical filter is towards first photodetector, and another side will be transmitted through first photodetector from the digital optical signal that the reflection of first optical filter comes fully towards first optical filter and second optical filter;
It is characterized in that,
The light time territory detection signal that the second optical filter reflected light interface receives;
The 3rd optical filter is concave curved surface towards the face of second optical filter, the analog optical signal that comes from the reflection of second optical filter is transmitted through second photodetector fully, and will after the light time territory detection signal that the reflection of second optical filter comes is assembled and reflex on second optical filter, enters described optical interface.
2. optical network unit three-dimensional optical assembly according to claim 1, wherein, the 3rd optical filter reflexes to second optical filter fully with territory detection signal of described light time, and second optical filter should reflex to described optical interface by light time territory detection signal, reflex to described optical interface from second optical filter and go forward side by side and be at least 10% of the intensity of the light time territory detection signal that enters described optical network unit three-dimensional optical assembly from described optical interface into the intensity of the light time territory detection signal of optical fiber.
3. optical network unit three-dimensional optical assembly according to claim 1, wherein, the wavelength of territory detection signal of described light time is 1600nm-1665nm.
4. optical network unit three-dimensional optical assembly according to claim 1, wherein, the angle of first optical filter between the direction that the optical axis of the outside normal direction by this surface on the surface of laser instrument and laser instrument extends toward optical interface is about 135 degree, and second optical filter is about 45 to spend towards the optical axis of the outside normal direction by this surface on the surface of optical interface and laser instrument toward the angle between the direction of optical interface extension.
5. optical network unit three-dimensional optical assembly according to claim 4, wherein, the optical axis of described laser instrument and the optical axis of described optical interface are located along the same line substantially; The optical axis of first photodetector is vertical substantially with the optical axis of described laser instrument; The optical axis of described second photodetector is vertical substantially with the optical axis of described laser instrument.
6. optical network unit three-dimensional optical assembly according to claim 1 also comprises:
Betal can;
First optical filter, second optical filter, the 3rd optical filter and the 4th optical filter are arranged in the described betal can, and described laser instrument, first and second photodetectors and described optical interface are installed on the described betal can.
7. optical network unit three-dimensional optical assembly with light time territory signal reflex function, comprise: be used for the up light of emission laser instrument, receive descending light digital optical signal first photodetector and receive second photodetector, first to fourth optical filter of the analog optical signal in the descending light and be used for external optical fiber to transmit the optical interface of up light and descending light and light time territory detection signal, wherein
The one side of first optical filter is towards described laser instrument, and another side is towards first photodetector and optical interface, the complete transmission of emission light signal that laser instrument is sent;
The one side of second optical filter is towards described laser instrument and first photodetector, another side is towards second photodetector and optical interface, to the described complete transmission that transmits, to the complete transmission of digital optical signal in the described descending light, the analog optical signal in the described descending light is reflected fully;
The one side of the 3rd optical filter is towards second photodetector, and another side will be transmitted through second photodetector from the analog optical signal that the reflection of second optical filter comes fully towards second optical filter;
The one side of the 4th optical filter is towards first photodetector, and another side is towards first optical filter and second optical filter;
It is characterized in that,
The light time territory detection signal that the second optical filter transmitted light interface receives and from digital optical signal to the first optical filter in the descending light of optical interface, first optical filter reflects territory detection signal of described light time and reflects described digital optical signal fully;
The 4th optical filter is concave curved surface towards the face of first and second optical filters, to be transmitted through first photodetector fully from the digital optical signal that first optical filter reflection comes, and will assemble and reflex to from the light time territory detection signal that the reflection of first optical filter comes and enter described optical interface after first optical filter and transmission are crossed on second optical filter.
8. optical network unit three-dimensional optical assembly according to claim 7, wherein, the 4th optical filter reflexes to first optical filter fully with territory detection signal of described light time, and transmission was crossed second optical filter and is entered described optical interface after first optical filter will reflex to second optical filter from the light time territory detection signal that the 4th optical filter reflects, from first optical filter reflection and transmission through the intensity that enters the light time territory detection signal of optical fiber through optical interface second optical filter after be from described optical interface enter described optical network unit three-dimensional optical assembly light time territory detection signal intensity at least 10%.
9. optical network unit three-dimensional optical assembly according to claim 7, wherein, the wavelength of territory detection signal of described light time is 1600nm-1665nm.
10. optical network unit three-dimensional optical assembly according to claim 7, wherein, the angle of first optical filter between the direction that the optical axis of the outside normal direction by this surface on the surface of laser instrument and laser instrument extends toward optical interface is about 135 degree, and second optical filter is about 45 to spend towards the optical axis of the outside normal direction by this surface on the surface of optical interface and laser instrument toward the angle between the direction of optical interface extension.
11. optical network unit three-dimensional optical assembly according to claim 10, wherein, the optical axis of described laser instrument and the optical axis of described optical interface are located along the same line substantially; The optical axis of first photodetector is vertical substantially with the optical axis of described laser instrument; The optical axis of described second photodetector is vertical substantially with the optical axis of described laser instrument.
12. optical network unit three-dimensional optical assembly according to claim 7 also comprises:
Betal can;
First optical filter, second optical filter, the 3rd optical filter and the 4th optical filter are arranged in the described betal can, and described laser instrument, first and second photodetectors and described optical interface are installed on the described betal can.
CN 201220551828 2012-10-25 2012-10-25 Optical network unit three-way optical component with optical time domain signal reflection function Withdrawn - After Issue CN203164477U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102937734A (en) * 2012-10-25 2013-02-20 青岛海信宽带多媒体技术有限公司 Optical network unit three-direction optical assembly with optical time domain signal reflection function
CN103475915A (en) * 2013-09-16 2013-12-25 上海斐讯数据通信技术有限公司 Multifunctional television in access to signals through optical fibers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102937734A (en) * 2012-10-25 2013-02-20 青岛海信宽带多媒体技术有限公司 Optical network unit three-direction optical assembly with optical time domain signal reflection function
CN103475915A (en) * 2013-09-16 2013-12-25 上海斐讯数据通信技术有限公司 Multifunctional television in access to signals through optical fibers

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