CN106888066A - Wavelength selecting method and device, optical module, optical line terminal and EPON - Google Patents
Wavelength selecting method and device, optical module, optical line terminal and EPON Download PDFInfo
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- CN106888066A CN106888066A CN201510930483.XA CN201510930483A CN106888066A CN 106888066 A CN106888066 A CN 106888066A CN 201510930483 A CN201510930483 A CN 201510930483A CN 106888066 A CN106888066 A CN 106888066A
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- wavelength
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- division multiplex
- multiplex element
- optical signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0202—Arrangements therefor
- H04J14/021—Reconfigurable arrangements, e.g. reconfigurable optical add/drop multiplexers [ROADM] or tunable optical add/drop multiplexers [TOADM]
- H04J14/0212—Reconfigurable arrangements, e.g. reconfigurable optical add/drop multiplexers [ROADM] or tunable optical add/drop multiplexers [TOADM] using optical switches or wavelength selective switches [WSS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/40—Transceivers
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Abstract
The present invention discloses a kind of Wavelength selecting method and device, optical module, optical line terminal and EPON.The wavelength selecting device includes the first wavelength-division multiplex element, the second wavelength-division multiplex element and the 3rd wavelength-division multiplex element, wherein, the first wavelength-division multiplex element, for the first optical signal that optical connector transmitting comes to be reflexed into the first receiver；Second wavelength-division multiplex element, for the second optical signal that optical connector transmitting comes to be reflexed into the second receiver；3rd wavelength-division multiplex element, the 3rd optical signal for first transmitter to be launched is transmitted to optical connector, and the 4th optical signal that second transmitter is launched is reflexed into optical connector.The present invention can complete the unification partial wave multiplex treatment of GPON and XG-PON signals, it is possible to achieve the single fiber four-way transmission of standard size optical module, it is possible thereby to be obviously improved the convenience and adaptability of XG-PON upgrading deployment, reduce upgrade cost.
Description
Technical field
The present invention relates to broadband optical access technology field, more particularly to a kind of Wavelength selecting method and
Device, optical module, optical line terminal and EPON.
Background technology
With developing rapidly for high speed internet application, the speed-raising demand of user bandwidth is increasingly urgent,
It is trend of the times that light fibrillation is accessed.GPON (Gigabit Passive Optical Network, it is lucky
Bit passive optical network) technical support 1.25G/2.5Gbps up-downgoing speed, use up-downgoing
Centre wavelength is respectively 1310nm and 1490nm, and up-downgoing wave-length coverage is respectively 1290~
1330nm (constriction wave band) and 1480nm~1500nm, its local side OLT (Optical Line
Termination, optical line terminal) and user terminal ONU (Optical Network Unit, light
NE) between use single fiber bi-directional 1：ODN (the Optical Distribution of N splitting ratios
Network, fiber distribution network) network structure is connected, with high bandwidth, high efficiency, covers greatly
The characteristics of lid scope, province's optical fiber, had been widely used in the deployment of fiber to the home existing network at present.
But with 100,000,000 or even the progressively popularization of gigabit service product, using GPON equipment in height
The bottleneck of access bandwidth is still likely to occur in the case of the splitting ratio rate of actual installation, therefore supports 10Gbps speed
XG-PON (10-Gigabit-capable Passive the Optical Networks, 10G of rate ability
Bit passive optical network) technology deployment urgency be consequently increased.XG-PON is the liter of GPON
Level technology, supports the up-downgoing speed of 2.5G/10Gbps, and performance boost is notable, and energy and GPON
Coexisted in existing ODN, current equipment progressively starts maturation.But, due to carrying XG-PON
Up-downgoing light path centre wavelength it is different from GPON, respectively 1270nm and 1577nm,
Corresponding up-downgoing wave-length coverage is respectively 1260~1280nm and 1575nm~1580nm, especially
It is that the interval interval with GPON upstream wavelengths of its upstream wavelength closely (is only spaced 10nm),
Needed during compatible GPON by WDM (the Wavelength Division of particular design
Multiplexing, wavelength-division multiplex) device is processed, and the same PON of local side apparatus in upgrading
Mouth coexists realizes that difficulty is larger.
It is general using newly-increased external in common superimposed type XG-PON upgradings deployment scheme
WDM devices and increasing XG-PON boards realize mixed networking.Wherein, newly-increased WDM components
And the optical link insertion loss for being brought of associated fiber interface links is larger, for optical link budgets
Easily cause the decline of the performance indications such as coverage for tighter project plan, while increased
Trouble point；It is extra increased and newly-increased XG-PON boards need to take the groove position of original OLT
The general volume of WDM devices is larger, also needs the OLT slots or frame placement sky for possessing separate free
Between, engineered relative complex and condition is limited, and upgrade cost is high.This superposition networking mode liter
After level, as long as if user side also has a GPON ONU terminals, local side GPON boards just must
Must all the time retain, also increase maintenance difficulties from now on.
The content of the invention
In view of above technical problem, the invention provides a kind of Wavelength selecting method and device, optical mode
Block, optical line terminal and EPON, realize the single fiber four-way transmission of standard size optical module,
The convenience and adaptability of XG-PON upgrading deployment have been obviously improved, upgrade cost has been reduced.
According to an aspect of the present invention, there is provided a kind of wavelength selecting device, including the first wavelength-division
Multiplex element, the second wavelength-division multiplex element and the 3rd wavelength-division multiplex element, wherein：
First wavelength-division multiplex element, for the first optical signal that optical connector transmitting comes to be reflexed to
First receiver；
Second wavelength-division multiplex element, for the second optical signal that optical connector transmitting comes to be reflexed to
Second receiver；
3rd wavelength-division multiplex element, the 3rd optical signal for first transmitter to be launched is transmitted to
Optical connector, and the 4th optical signal that second transmitter is launched is reflexed into optical connector.
In one embodiment of the invention, the first wavelength-division multiplex element is additionally operable to optical connector
The second optical signal that transmitting comes is transmitted to the second wavelength-division multiplex element, so as to the second wavelength-division multiplex unit
The second optical signal that first wavelength-division multiplex element is transmitted is reflexed to the second receiver by part；
3rd wavelength-division multiplex element is used to for the 3rd optical signal that first transmitter is launched to be transmitted to the
Two wavelength-division multiplex elements, and the 4th optical signal that second transmitter is launched is reflexed into the second wavelength-division
Multiplex element；
Second wavelength-division multiplex element is additionally operable to the 3rd optical signal for transmiting the 3rd wavelength-division multiplex element
The 4th optical signal reflected with the 3rd wavelength-division multiplex element is transmitted to the first wavelength-division multiplex element, with
Just the 3rd optical signal and the 4th optical signal are transmitted to optical connector by the first wavelength-division multiplex element.
In one embodiment of the invention, the first optical signal is that optical network unit is received to first
The uplink optical signal that device sends；Second optical signal is what optical network unit sent to the second receiver
Uplink optical signal；3rd optical signal is that first transmitter is believed to the descending light that optical network unit sends
Number；4th optical signal is the downlink optical signal that second transmitter sends to optical network unit.
In one embodiment of the invention, the wavelength selecting device is also multiple including the 4th wavelength-division
With element, wherein：
First wavelength-division multiplex element is used to for the first optical signal that optical connector transmitting comes to reflex to the
Four wavelength-division multiplex elements；
4th wavelength-division multiplex element, for the first optical signal for reflecting the first wavelength-division multiplex element
The first receiver is reflexed to, to ensure the first optical signal vertically reflection such as the first receiver.
In one embodiment of the invention, optical connector and first transmitter are coaxially disposed；
First wavelength-division multiplex element, the second wavelength-division multiplex element and the 3rd wavelength-division multiplex element are successively
Optical connector is arranged on to the primary optic axis of first transmitter；
First wavelength-division multiplex element, the second wavelength-division multiplex element are respectively with primary optic axis vertical direction
Left avertence turns first angle and second angle, and the 3rd wavelength-division multiplex unit and the 4th wavelength-division multiplex are with first
Optical axis vertical direction right avertence turns third angle and fourth angle, wherein first angle, second angle,
Third angle and fourth angle are acute angle.
In one embodiment of the invention, the first wavelength-division multiplex element, the second wavelength-division multiplex unit
Part, the 3rd wavelength-division multiplex element and the 4th wavelength-division multiplex element use filter plate；First angle
It it is 45 degree with fourth angle sum；Second angle is respectively 45 degree with third angle.
According to another aspect of the present invention, there is provided a kind of optical line terminal optical module, including first hair
Emitter, second transmitter, the first receiver, the second receiver, optical connector and above-mentioned
Wavelength selecting device described in one embodiment.
In one embodiment of the invention, first transmitter is XG-PON optical transmitting sets, the
Two transmitters are G-PON optical transmitting sets；First receiver is XG-PON optical receivers, the
Two receivers are G-PON optical receivers.
According to another aspect of the present invention, there is provided a kind of optical line terminal, including as described above any reality
Apply the optical line terminal optical module described in example.
According to another aspect of the present invention, there is provided a kind of EPON, including the first optical-fiber network list
Unit, the second optical network unit, shunt and the optical link end as described in above-mentioned any embodiment
End, wherein：Shunt respectively with the first optical network unit, the second optical network unit and optical link
Terminal is connected.
In one embodiment of the invention, the first optical network unit is XG-PON optical-fiber network lists
Unit, the second optical network unit is G-PON optical network units.
According to another aspect of the present invention, there is provided a kind of Wavelength selecting method, including：
The first optical signal that optical connector transmitting comes is reflexed to first and connect by the first wavelength-division multiplex element
Receive device；
The second optical signal that optical connector transmitting comes is transmitted to the second ripple by the first wavelength-division multiplex element
Divide multiplex element, the second light that the second wavelength-division multiplex element carrys out the transmission of the first wavelength-division multiplex element
Signal reflex is to the first receiver.
In one embodiment of the invention, the Wavelength selecting method also includes：
The 3rd optical signal that first transmitter is launched is transmitted to the second ripple by the 3rd wavelength-division multiplex element
Divide multiplex element, the 3rd light letter that the second wavelength-division multiplex element transmits the 3rd wavelength-division multiplex element
Number it is transmitted to the first wavelength-division multiplex element, the first wavelength-division multiplex element is by the second wavelength-division multiplex element
3rd optical signal of transmission is transmitted to optical connector；
The 4th optical signal that second transmitter is launched is reflexed to the second ripple by the 3rd wavelength-division multiplex element
Divide multiplex element, the 4th light letter that the second wavelength-division multiplex element reflects the 3rd wavelength-division multiplex element
Number it is transmitted to the first wavelength-division multiplex element, the first wavelength-division multiplex element is by the second wavelength-division multiplex element
4th optical signal of transmission is transmitted to optical connector.
In one embodiment of the invention, the first wavelength-division multiplex element carrys out optical connector transmitting
The first optical signal include the step of reflex to the first receiver：
The first optical signal that optical connector transmitting comes is reflexed to the 4th ripple by the first wavelength-division multiplex element
Divide multiplex element；
4th wavelength-division multiplex element reflexes to the first optical signal that the first wavelength-division multiplex element reflects
First receiver.
In one embodiment of the invention, the first optical signal is that optical network unit is received to first
The uplink optical signal that device sends；Second optical signal is what optical network unit sent to the second receiver
Uplink optical signal；3rd optical signal is that first transmitter is believed to the descending light that optical network unit sends
Number；4th optical signal is the downlink optical signal that second transmitter sends to optical network unit.
The present invention is by the built-in special bit angle setting in the optical transceiver module of terminal OLT device
Degree collocation and light path move towards the filtering blade unit group of method, so as to complete GPON and
The unification partial wave multiplex treatment of XG-PON signals, realizes the single fiber of standard size optical module
Four-way is transmitted, it is possible thereby to the convenience and adaptability of XG-PON upgrading deployment are obviously improved,
Reduce upgrade cost.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will
The accompanying drawing to be used needed for embodiment or description of the prior art is briefly described, it is clear that
Ground, drawings in the following description are only some embodiments of the present invention, for the common skill in this area
For art personnel, without having to pay creative labor, can also be obtained according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the schematic diagram of optical line terminal optical module one embodiment of the present invention.
Fig. 2 is the schematic diagram of EPON one embodiment of the present invention.
Fig. 3 is the schematic diagram of Wavelength selecting method one embodiment of the present invention.
Fig. 4 is the schematic diagram of another embodiment of Wavelength selecting method of the present invention.
Fig. 5 is the schematic diagram of the another embodiment of Wavelength selecting method of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, to the technical scheme in the embodiment of the present invention
It is clearly and completely described, it is clear that described embodiment is only a real part of the invention
Example is applied, rather than whole embodiments.Below to the description reality of at least one exemplary embodiment
On be merely illustrative, never as to the present invention and its application or any limitation for using.Base
Embodiment in the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belongs to the scope of protection of the invention.
Unless specifically stated otherwise, the part that otherwise illustrates in these embodiments and step it is relative
Arrangement, numerical expression and numerical value are not limited the scope of the invention.
Simultaneously, it should be appreciated that for the ease of description, the size of the various pieces shown in accompanying drawing
It is not to be drawn according to actual proportionate relationship.
May not make in detail for technology, method and apparatus known to person of ordinary skill in the relevant
Discuss, but in the appropriate case, the technology, method and apparatus should be considered as authorizing specification
A part.
In all examples shown here and discussion, any occurrence should be construed as merely and show
Example property, not as limitation.Therefore, the other examples of exemplary embodiment can have not
Same value.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore,
Once being defined in a certain Xiang Yi accompanying drawing, then need not it be entered to advance in subsequent accompanying drawing
One step discussion.
Fig. 1 is the schematic diagram of optical line terminal optical module one embodiment of the present invention.As shown in figure 1,
The optical line terminal optical module includes that first transmitter 20, second transmitter 30, first are received
Device 40, the second receiver 50, optical connector 60 and wavelength selecting device, wherein：
Optical connector 60 and first transmitter 20 are coaxially disposed.
Optical connector 60 is also connected with optical fiber, descending for launch optical line terminal optical module
Light by Optical Fiber Transmission to optical network unit, and receive optical network unit by Optical Fiber Transmission come
Up light.
In one embodiment of the invention, first transmitter 20 can be sent out for XG-PON light
Emitter, second transmitter 30 can be G-PON optical transmitting sets；First receiver 40 can be with
It is XG-PON optical receivers, the second receiver 50 can be G-PON optical receivers.
The wavelength selecting device can realize that the single fiber four-way of standard size encapsulation optical module is (double
Receive double hairs) multiplexing transmission, i.e. GPON and XG-PON signals connect in same PON light
Intraoral single fiber sends and receives.
Therefore, the optical line terminal optical module described in Fig. 1 can be GPON and XG-PON
Integration type OLT optical modules.
Specifically, in one embodiment of the invention, as shown in figure 1, the wavelength is selected
Selecting device can include the first wavelength-division multiplex element 11, the second wavelength-division multiplex element 12 and the 3rd
Wavelength-division multiplex element 13, wherein：
First wavelength-division multiplex element 11, for optical connector 60 to be launched into the first optical signal for coming
Reflex to the first receiver 40.
Second wavelength-division multiplex element 12, for optical connector 60 to be launched into the second optical signal for coming
Reflex to the second receiver 50.
More specifically, as shown in figure 1, the first wavelength-division multiplex element 11 can be also used for connecting light
Connect the second next optical signal of the transmitting of device 60 and be transmitted to the second wavelength-division multiplex element 12, so as to second
The second optical signal that first wavelength-division multiplex element 11 is transmitted is reflexed to by wavelength-division multiplex element 12
Two receivers 50.
Thus, the above embodiment of the present invention is multiple by the first wavelength-division multiplex element 11 and the second wavelength-division
The first optical signal and the second optical signal difference for accessing optical receiver can be realized with element 12
Receive the first receiver 40 and the second receiver 50.
3rd wavelength-division multiplex element 13, for the 3rd optical signal for launching first transmitter 20
Optical connector 60 is transmitted to, and the 4th optical signal that second transmitter 30 is launched reflexes to light
Connector 60.
Specifically, as shown in figure 1, the first wavelength-division multiplex element 11 is specifically for first is launched
3rd optical signal of the transmitting of device 20 is transmitted to the second wavelength-division multiplex element 12, and second is launched
4th optical signal of the transmitting of device 30 reflexes to the second wavelength-division multiplex element 12.
Second wavelength-division multiplex element 12 specifically can be also used for the 3rd wavelength-division multiplex element 13 is saturating
4th optical signal of the 3rd optical signal and the 3rd wavelength-division multiplex element 13 reflection penetrated is transmitted to the
One wavelength-division multiplex element 11, so that the first wavelength-division multiplex element 11 is by the 3rd optical signal and the 4th
Optical signal is transmitted to optical connector 60.
Thus, the above embodiment of the present invention is answered by the 3rd wavelength-division multiplex element 13, the second wavelength-division
With element 12, the first wavelength-division multiplex element 11 can be realized will be respectively from the and of first transmitter 20
3rd optical signal and the 4th optical signal launch of the transmitting of second transmitter 30 are to optical connector 60.
In one embodiment of the invention, the first optical signal can be optical network unit to first
The uplink optical signal that receiver 40 sends；Second optical signal can be that optical network unit connects to second
Receive the uplink optical signal that device 50 sends；3rd optical signal can be first transmitter 20 to light net
The downlink optical signal that network unit sends；4th optical signal can be second transmitter 30 to optical-fiber network
The downlink optical signal that unit sends.
In one particular embodiment of the present invention, the first receiver 40 can be XG-PON
Optical receiver.First optical signal can be that optical network unit sends to XG-PON optical receivers
The a length of 1270nm of uplink optical signal, wherein cardiac wave, wave-length coverage is 1260~1280nm.
Second receiver 50 can be G-PON optical receivers.Second optical signal can be light net
The uplink optical signal that network unit sends to G-PON optical receivers, the wherein a length of 1310nm of cardiac wave,
Wave-length coverage is 1290~1330nm.
First transmitter 20 can be XG-PON optical transmitting sets.3rd optical signal can be
The downlink optical signal that XG-PON optical transmitting sets send to optical network unit, wherein cardiac wave are a length of
1577nm, wave-length coverage is 1575nm~1580nm.
Second transmitter 30 can be G-PON optical transmitting sets.4th optical signal can be
The downlink optical signal that G-PON optical transmitting sets send to optical network unit, wherein cardiac wave are a length of
1490nm, wave-length coverage is 1480nm~1500nm.
In one embodiment of the invention, as shown in figure 1, the wavelength selecting device may be used also
With including the 4th wavelength-division multiplex element 14, wherein：
The first optical signal that first wavelength-division multiplex element 11 is used to launch optical connector 60 to come is anti-
It is mapped to the 4th wavelength-division multiplex element 14；
4th wavelength-division multiplex element 14, for the first wavelength-division multiplex element 11 is reflected first
Optical signal reflexes to the first receiver 40, to ensure that vertically reflection such as first is received the first optical signal
Device 40, consequently facilitating device (the first receiver 40) interface lays encapsulation.
In one embodiment of the invention, as shown in figure 1, the first wavelength-division multiplex element 11,
Second wavelength-division multiplex element 12 and the 3rd wavelength-division multiplex element 13 are successively set on optical connector 60
Onto the primary optic axis of first transmitter 20.
First wavelength-division multiplex element 11, the second wavelength-division multiplex element 12 are hung down with primary optic axis respectively
Nogata deflects first angle and second angle to the left；3rd wavelength-division multiplex unit and the 4th wavelength-division multiplex
Third angle and fourth angle, wherein first angle, are turned with primary optic axis vertical direction right avertence
Two angles, third angle and fourth angle are acute angle.
In one particular embodiment of the present invention, first angle and fourth angle sum are 45
Degree；Second angle is respectively 45 degree with third angle.
In one embodiment of the invention, the first wavelength-division multiplex element 11, the second wavelength-division multiplex
Element 12, the 3rd wavelength-division multiplex element 13 and the 4th wavelength-division multiplex element 14 can be using filters
Wave plate.
In one embodiment of the invention, the wavelength selecting device can be light filter plate group,
The smooth filter plate group is made up of the plated film filter plate of 4 pieces of different wave length cut-off characteristicses, the light
During filter plate group is located in the built-in optical module of terminal OLT device, specific position angle takes
The light filter plate group matched somebody with somebody.
Based on the above embodiment of the present invention provide wavelength selecting device and GPON and
XG-PON integration type OLT optical modules, light is split by the specific collocation of filter plate low-angle
The method on road adapts to the wavelength signals closely-spaced in the same direction of 10nm, and its light path output angle is favourable
Laid in the position of GPON, XG-PON opto-electronic conversion transceiving device, it is right so as to complete
The unification filtering process of GPON and XG-PON signals, realizes standard size encapsulation optical mode
Single fiber four-way (the double hairs of double receipts) multiplexing transmission of block, i.e. GPON and XG-PON signals exist
Single fiber in same PON optical interfaces sends and receives.The component knot of the above embodiment of the present invention
Structure can meet the encapsulation of standard-sized XFP optical modules, while the loss of the present invention program is less than
Common externally positioned type WDM parts, it is possible thereby to be obviously improved the facility of XG-PON upgrading deployment
Property and adaptability, reduce upgrade cost.
In one particular embodiment of the present invention, as shown in figure 1, being cut using 4 different filtering
Only the light filter plate group of characteristic completes the separation and synthesis to GPON, XG-PON up-downgoing wavelength.
Optical signal is incident from horizontal direction and sends, and unification component is entered by optical connector.
Wherein, special light path design is：
The position of filter plate 11 (the first wavelength-division multiplex element 11) deflects 32 to the left in vertical direction
Degree.XG-PON upstream wavelengths optical signal total reflection for below 1280nm, for 1290nm
Wavelength total transmissivity above, so that XG-PON upward signals are separated, and it is upper and lower for GPON
Row signal and XG-PON downstream signals then all pass through.
The position of filter plate 14 (the 4th wavelength-division multiplex element 14) deflects to the right 13 in vertical direction
Degree, be totally reflected for all wavelengths optical signal, and with the placed angle matched combined of filter plate 1,
So that the XG-PON upstream wavelengths optical signal of incidence is sent to XG-PON with vertical 90 degree of directions
RX optical signal receiving terminal components, be easy to device interface to lay encapsulation.XG-PON RX are received
Device is processed after completing opto-electronic conversion into XG-PON processing units.
The position of filter plate 12 (the second wavelength-division multiplex element 12) deflects 45 to the left in vertical direction
Degree, XG-PON the and GPON downstream wavelength optical signal total transmissivities for more than 1330nm；It is right
It is totally reflected in the wavelength of below 1330nm so that incident GPON upstream wavelengths optical signal is with vertical
0 degree of Helicopter-9 is forwarded to the RX optical signal receiving terminal components of GPON.GPON RX receivers are completed
Processed into GPON processing units after opto-electronic conversion.
The position of filter plate 13 (the 3rd wavelength-division multiplex element 13) deflects to the right 45 in vertical direction
Degree, the XG-PON down going waves of more than the 1575nm sent for XG-PON TX optical transmitting sets
Optical signal total transmissivity long, into filter plate 2；For the 1500nm that GPON TX optical transmitting sets send
Following downstream wavelength optical signal total reflection, into filter plate 2.Wherein, XG-PON TX transmittings
Device receives the electric signal after XG-PON processing unit processes and completes electro-optic conversion, GPON TX hairs
Emitter receives the electric signal after GPON processing unit processes and completes electro-optic conversion.
Fig. 2 is the schematic diagram of EPON one embodiment of the present invention.Fig. 2 describes the present invention
Apply carries out the scheme that XG-PON upgrading deployment is implemented on the basis of existing network.Office side OLT's
When GPON upgrades to XG-PON, only need to replace new compatible GPON's in former groove position
XG-PON one board (supports GPON/XG-PON MAC), and inserts
(can also be built into for the function of integration type optical module by the optical module of GPON/XG-PON integration types
In XG-PON plates), original ODN is accessed, user's lateral terminal upgrades to XG-PON ONU on demand
.
According to another aspect of the present invention, there is provided a kind of optical line terminal, as shown in Fig. 2 light
Road terminal 100 can include optical line terminal optical module 110, wherein：
The optical line terminal optical module 110, can be for described in any embodiment as shown in Figure 1
Optical line terminal optical module.
EPON as shown in Figure 2 includes the first optical network unit 310, the second optical-fiber network list
Unit 320, shunt 200 and the optical line terminal as described in above-mentioned any embodiment 100, its
In：
Shunt 200 respectively with the first optical network unit 310, the second optical network unit 320 and
Optical line terminal 100 is connected.
In one embodiment of the invention, the first optical network unit 310 can be XG-PON
Optical network unit, the second optical network unit 320 can be G-PON optical network units.
Based on the above embodiment of the present invention provide EPON, terminal OLT device it is built-in
The light filter plate group of specific position angle collocation is placed in optical module, it is special by 4 pieces of different wave length cut-offs
Property plated film filter plate composition, by the specific collocation of filter plate low-angle split the method for light path come
Adapt to the closely-spaced wavelength signals in the same direction of 10nm of GPON, XG-PON, its light path output angle
The position of opto-electronic conversion transceiving device is conducive to lay, so as to complete to GPON and XG-PON
The unification filtering process of signal, realizes single fiber four-way (double receipts pair of standard size encapsulation optical module
Hair) list of multiplexing transmission, i.e. GPON and XG-PON signals in same PON optical interfaces
Fibre sends and receives, and modular construction can meet the encapsulation of standard-sized XFP optical modules, is lost low
In common externally positioned type WDM parts.
Embodiment shown in Fig. 1 of the present invention can make XG-PON systems and GPON system boards
It is integrated, original GPON boards are directly replaced in deployment and realizes upgrading, it is original high in existing network
The ODN of lower deployment cost is without changing, it is possible thereby to be obviously improved the facility of XG-PON upgradings
Property and adaptability, reduce lower deployment cost.Meanwhile, the optical path component combination opto-electronic conversion of unificationization is received
The optical module packaging scheme that hair device assembly is formed can be encapsulated as common XFP sizes, integrated device
Volume production uniformity is good, and optical interface need not be changed when replacing application, and fault rate is low, greatly reduces dimension
The difficulty (referring to Fig. 2) of shield.
According to simulation test, the present invention carries out what XG-PON upgrading deployment was implemented on the basis of existing network
The insertion loss increase of 4 wavelength of the scheme for GPON, XG-PON can be down to 0.7dB with
It is interior, compared to the optical link budgets that externally positioned type WDM schemes at least lift 0.3dB, compared to existing network portion
Administration's distance range influence is smaller, is capable of achieving wider covering.The conjunction that the device described according to Fig. 1 is formed
One changes Integrated Solution, can be at the built-in encapsulation of standard-sized optical module (such as XFP), and volume production is consistent
Property it is good, device cost increases little, and fault rate is low.
XG-PON upgrading schemes compared to externally positioned type WDM, using unificationization of the present invention
The upgrading scheme of apparatus module need not take the new groove position of OLT, and ODN networks need not be changed,
Due to the downward compatibility of local side, the change without being concerned about ustomer premises access equipment, therefore engineering construction is more
For convenience, upgrade cost is low, while greatly reducing the difficulty safeguarded from now on.
Fig. 3 is the schematic diagram of Wavelength selecting method one embodiment of the present invention.Preferably, this implementation
Example can be performed by the optical line terminal optical module described in Fig. 1 embodiments of the present invention.The method includes
Following steps：
Step 301, the first wavelength-division multiplex element 11 is launched the first light letter for coming by optical connector 60
Number reflex to the first receiver 40.
In one embodiment of the invention, step 101 can include：First wavelength-division multiplex unit
Part 11 optical connector 60 is launched the first optical signal for coming and reflexes to the 4th wavelength-division multiplex element
14；The first light that the 4th wavelength-division multiplex element 14 reflects the first wavelength-division multiplex element 11 afterwards
Signal reflex is to the first receiver 40.
In one embodiment of the invention, the first optical signal is that optical network unit is received to first
The uplink optical signal that device 40 sends.Thus, by step 301 can realize optical network unit to
The reception of the uplink optical signal of the transmitting of the first receiver 40.
In one particular embodiment of the present invention, the first receiver 40 can be XG-PON
Optical receiver.First optical signal can be that optical network unit sends to XG-PON optical receivers
The a length of 1270nm of uplink optical signal, wherein cardiac wave, wave-length coverage is 1260~1280nm.
Step 302, the first wavelength-division multiplex element 11 is launched the second light for coming by optical connector 60
Signal is transmitted to the second wavelength-division multiplex element 12, and the second wavelength-division multiplex element 12 is by the first wavelength-division
The second optical signal that the transmission of multiplex element 11 comes reflexes to the first receiver 40.
In one embodiment of the invention, the second optical signal is that optical network unit is received to second
The uplink optical signal that device 50 sends.Thus, by step 302 can realize optical network unit to
The reception of the uplink optical signal of the transmitting of the second receiver 50.
In one particular embodiment of the present invention, the second receiver 50 can be G-PON light
Receiver.Second optical signal can be optical network unit to G-PON optical receivers send it is upper
The a length of 1310nm of traveling optical signal, wherein cardiac wave, wave-length coverage is 1290~1330nm.
Fig. 4 is the schematic diagram of another embodiment of Wavelength selecting method of the present invention.Preferably, this implementation
Example can be performed by the optical line terminal optical module described in Fig. 1 embodiments of the present invention.With described in Fig. 3
Embodiment is compared, and in embodiment described in Fig. 4, methods described can also be comprised the following steps：
Step 401, the 3rd light that the 3rd wavelength-division multiplex element 13 launches first transmitter 20
Signal is transmitted to the second wavelength-division multiplex element 12.
In one embodiment of the invention, the 3rd optical signal is first transmitter 20 to optical-fiber network
The downlink optical signal that unit sends.
Step 402, what the second wavelength-division multiplex element 12 transmitted the 3rd wavelength-division multiplex element 13
3rd optical signal is transmitted to the first wavelength-division multiplex element 11.
Step 403, the first wavelength-division multiplex element 11 transmits the second wavelength-division multiplex element 12
3rd optical signal is transmitted to optical connector 60.
The above embodiment of the present invention can realize first transmitter 20 to the descending of optical network unit
The transmission of optical signal.
In one particular embodiment of the present invention, first transmitter 20 can be XG-PON
Optical transmitting set.3rd optical signal can be that XG-PON optical transmitting sets send to optical network unit
The a length of 1577nm of downlink optical signal, wherein cardiac wave, wave-length coverage is 1575nm~1580nm.
Fig. 5 is the schematic diagram of the another embodiment of Wavelength selecting method of the present invention.Preferably, this implementation
Example can be performed by the optical line terminal optical module described in Fig. 1 embodiments of the present invention.With described in Fig. 3
Embodiment is compared, and in embodiment described in Fig. 5, methods described can also be comprised the following steps：
Step 501, the 4th light that the 3rd wavelength-division multiplex element 13 launches second transmitter 30
Signal reflex is to the second wavelength-division multiplex element 12.
In one embodiment of the invention, the 4th optical signal is second transmitter 30 to optical-fiber network
The downlink optical signal that unit sends.
Step 502, what the second wavelength-division multiplex element 12 reflected the 3rd wavelength-division multiplex element 13
4th optical signal is transmitted to the first wavelength-division multiplex element 11.
Step 503, the first wavelength-division multiplex element 11 transmits the second wavelength-division multiplex element 12
4th optical signal is transmitted to optical connector 60.
The above embodiment of the present invention can realize second transmitter 30 to the descending of optical network unit
The transmission of optical signal.
In one particular embodiment of the present invention, second transmitter 30 can be G-PON light
Transmitter.4th optical signal can G-PON optical transmitting sets to optical network unit send under
The a length of 1490nm of traveling optical signal, wherein cardiac wave, wave-length coverage is 1480nm~1500nm.
In one embodiment of the invention, the wavelength selecting device can be light filter plate group,
The smooth filter plate group is made up of the plated film filter plate of 4 pieces of different wave length cut-off characteristicses, the light
During filter plate group is located in the built-in optical module of terminal OLT device, specific position angle takes
The light filter plate group matched somebody with somebody.
Based on the Wavelength selecting method that the above embodiment of the present invention is provided, by filter plate low-angle
The method of specific collocation segmentation light path adapt to the wavelength signals closely-spaced in the same direction of 10nm, its
Light path output angle is conducive to the position of GPON, XG-PON opto-electronic conversion transceiving device to lay,
So as to complete the unification filtering process to GPON and XG-PON signals, mark is realized
Single fiber four-way (double receipts double hair) multiplexing transmission, the i.e. GPON of quasi- sized package optical module and
Single fiber of the XG-PON signals in same PON optical interfaces sends and receives.In the present invention
Stating modular construction in embodiment can meet the encapsulation of standard-sized XFP optical modules, while this hair
The loss of bright scheme is less than common externally positioned type WDM parts, it is possible thereby to be obviously improved XG-PON
The convenience and adaptability of upgrading deployment, reduce upgrade cost.
So far, the present invention is described in detail.In order to avoid covering design of the invention, do not have
Description some details known in the field.Those skilled in the art as described above, completely
It can be appreciated how implementing technical scheme disclosed herein.
One of ordinary skill in the art will appreciate that realizing all or part of step of above-described embodiment
Can be completed by hardware, it is also possible to instruct the hardware of correlation to complete by program, it is described
Program can be stored in a kind of computer-readable recording medium, and storage medium mentioned above can be with
It is read-only storage, disk or CD etc..
Description of the invention is given for the sake of example and description, and is not exhaustively
Or limit the invention to disclosed form.Common skill of many modifications and variations for this area
It is obvious for art personnel.Selection and description embodiment are to more preferably illustrate principle of the invention
And practical application, and make one of ordinary skill in the art it will be appreciated that the present invention is suitable so as to design
In the various embodiments with various modifications of special-purpose.
Claims (15)
1. a kind of wavelength selecting device, it is characterised in that including the first wavelength-division multiplex element,
Two wavelength-division multiplex elements and the 3rd wavelength-division multiplex element, wherein：
First wavelength-division multiplex element, for the first optical signal that optical connector transmitting comes to be reflexed to
First receiver；
Second wavelength-division multiplex element, for the second optical signal that optical connector transmitting comes to be reflexed to
Second receiver；
3rd wavelength-division multiplex element, the 3rd optical signal for first transmitter to be launched is transmitted to
Optical connector, and the 4th optical signal that second transmitter is launched is reflexed into optical connector.
2. wavelength selecting device according to claim 1, it is characterised in that
First wavelength-division multiplex element is additionally operable to be transmitted to the second optical signal that optical connector transmitting comes
Second wavelength-division multiplex element, so that the second wavelength-division multiplex element transmits the first wavelength-division multiplex element
The second optical signal reflex to the second receiver；
3rd wavelength-division multiplex element is used to for the 3rd optical signal that first transmitter is launched to be transmitted to the
Two wavelength-division multiplex elements, and the 4th optical signal that second transmitter is launched is reflexed into the second wavelength-division
Multiplex element；
Second wavelength-division multiplex element is additionally operable to the 3rd optical signal for transmiting the 3rd wavelength-division multiplex element
The 4th optical signal reflected with the 3rd wavelength-division multiplex element is transmitted to the first wavelength-division multiplex element, with
Just the 3rd optical signal and the 4th optical signal are transmitted to optical connector by the first wavelength-division multiplex element.
3. wavelength selecting device according to claim 1 and 2, it is characterised in that
First optical signal is the uplink optical signal that optical network unit sends to the first receiver；
Second optical signal is the uplink optical signal that optical network unit sends to the second receiver；
3rd optical signal is the downlink optical signal that first transmitter sends to optical network unit；
4th optical signal is the downlink optical signal that second transmitter sends to optical network unit.
4. wavelength selecting device according to claim 1 and 2, it is characterised in that also wrap
The 4th wavelength-division multiplex element is included, wherein：
First wavelength-division multiplex element is used to for the first optical signal that optical connector transmitting comes to reflex to the
Four wavelength-division multiplex elements；
4th wavelength-division multiplex element, for the first optical signal for reflecting the first wavelength-division multiplex element
The first receiver is reflexed to, to ensure the first optical signal vertically reflection such as the first receiver.
5. wavelength selecting device according to claim 4, it is characterised in that
Optical connector and first transmitter are coaxially disposed；
First wavelength-division multiplex element, the second wavelength-division multiplex element and the 3rd wavelength-division multiplex element are successively
Optical connector is arranged on to the primary optic axis of first transmitter；
First wavelength-division multiplex element, the second wavelength-division multiplex element are respectively with primary optic axis vertical direction
Left avertence turns first angle and second angle, and the 3rd wavelength-division multiplex unit and the 4th wavelength-division multiplex are with first
Optical axis vertical direction right avertence turns third angle and fourth angle, wherein first angle, second angle,
Third angle and fourth angle are acute angle.
6. wavelength selecting device according to claim 5, it is characterised in that
First wavelength-division multiplex element, the second wavelength-division multiplex element, the 3rd wavelength-division multiplex element and
Four wavelength-division multiplex elements use filter plate；
First angle and fourth angle sum are 45 degree；
Second angle is respectively 45 degree with third angle.
7. a kind of optical line terminal optical module, it is characterised in that including first transmitter, second
In transmitter, the first receiver, the second receiver, optical connector and such as claim 1-6
Wavelength selecting device described in any one.
8. optical line terminal optical module according to claim 7, it is characterised in that
First transmitter is 10G bit passive optical network XG-PON optical transmitting sets, the second transmitting
Device is gigabit passive optical network G-PON optical transmitting sets；
First receiver is XG-PON optical receivers, and the second receiver is G-PON light-receivings
Device.
9. a kind of optical line terminal, it is characterised in that including as claimed in claim 7 or 8
Optical line terminal optical module.
10. a kind of EPON, it is characterised in that including the first optical network unit, second
Optical network unit, shunt and optical line terminal as claimed in claim 9, wherein, point
Road device is connected with the first optical network unit, the second optical network unit and optical line terminal respectively.
11. EPONs according to claim 10, it is characterised in that
First optical network unit is 10G bit passive optical network XG-PON optical network units, the
Two optical network units are gigabit passive optical network G-PON optical network units.
A kind of 12. Wavelength selecting methods, it is characterised in that including：
The first optical signal that optical connector transmitting comes is reflexed to first and connect by the first wavelength-division multiplex element
Receive device；
The second optical signal that optical connector transmitting comes is transmitted to the second ripple by the first wavelength-division multiplex element
Divide multiplex element, the second light that the second wavelength-division multiplex element carrys out the transmission of the first wavelength-division multiplex element
Signal reflex is to the first receiver.
13. Wavelength selecting methods according to claim 12, it is characterised in that also include：
The 3rd optical signal that first transmitter is launched is transmitted to the second ripple by the 3rd wavelength-division multiplex element
Divide multiplex element, the 3rd light letter that the second wavelength-division multiplex element transmits the 3rd wavelength-division multiplex element
Number it is transmitted to the first wavelength-division multiplex element, the first wavelength-division multiplex element is by the second wavelength-division multiplex element
3rd optical signal of transmission is transmitted to optical connector；
The 4th optical signal that second transmitter is launched is reflexed to the second ripple by the 3rd wavelength-division multiplex element
Divide multiplex element, the 4th light letter that the second wavelength-division multiplex element reflects the 3rd wavelength-division multiplex element
Number it is transmitted to the first wavelength-division multiplex element, the first wavelength-division multiplex element is by the second wavelength-division multiplex element
4th optical signal of transmission is transmitted to optical connector.
14. Wavelength selecting methods according to claim 12, it is characterised in that first wave
The step of the first optical signal that optical connector transmitting comes is reflexed to the first receiver by point multiplex element
Including：
The first optical signal that optical connector transmitting comes is reflexed to the 4th ripple by the first wavelength-division multiplex element
Divide multiplex element；
4th wavelength-division multiplex element reflexes to the first optical signal that the first wavelength-division multiplex element reflects
First receiver.
15. Wavelength selecting method according to claim 13 or 14, it is characterised in that
First optical signal is the uplink optical signal that optical network unit sends to the first receiver；
Second optical signal is the uplink optical signal that optical network unit sends to the second receiver；
3rd optical signal is the downlink optical signal that first transmitter sends to optical network unit；
4th optical signal is the downlink optical signal that second transmitter sends to optical network unit.
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| CN113311543A (en) * | 2021-06-03 | 2021-08-27 | 四川天邑康和通信股份有限公司 | Novel coarse wavelength division multiplexer assembly |
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