CN1316844A - Optical split and multiplexer module for dual-fibre bidirectional loop network - Google Patents
Optical split and multiplexer module for dual-fibre bidirectional loop network Download PDFInfo
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- CN1316844A CN1316844A CN01118467A CN01118467A CN1316844A CN 1316844 A CN1316844 A CN 1316844A CN 01118467 A CN01118467 A CN 01118467A CN 01118467 A CN01118467 A CN 01118467A CN 1316844 A CN1316844 A CN 1316844A
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Abstract
An optical split-insertion multiplexer module for dual-fibre bidirectional ring network is composed of input optical fibre, output optical fibre, uplink and downlink switch array, symmetric integrated waveguide array raster and single-wave optical signal channel group. It can support the transmission of 8 I-TUT optical wavelenges over each optical fibre, the highest single wave speed of 10 Gb/s, dynamic configuration of 16 wavelengthes, the next generation intelligent dynamic C routing function of optical nodes and optical waves. Its advantages include simple structure and high practicality.
Description
The invention belongs to the optical communication technology field, particularly the structural design of OADM module.
Optical Add Drop Multiplexer (OADM) is a kind of in two kinds of optical nodes of all-optical network, and its function is on the light territory signal to be implemented upper and lower road function.
Up to now, the OADM module all is to design at the unidirectional looped network of two fibres both at home and abroad, belongs to two fine unidirectional OADM.The typical structure of single fiber bi-directional OADM as shown in Figure 1, it is by input optical fibre 111, multiplexer 13, optical switch 14, demodulation multiplexer 12, output optical fibre 112 is formed.Wherein input optical fibre 111 1 ends and other functional module (protection is switched as, input side) link to each other, and the other end links to each other with demodulation multiplexer 12.Single wavelength channel that demodulation multiplexer solves links to each other with the input of 2 * 2 optical switches 14 respectively, and another input of 2 * 2 optical switches links to each other with the equipment (or optical fiber) of the signal of setting out on a journey.Two output ports of 2 * 2 optical switches, one is continuous with following pipeline equipment (or the optical fiber that links to each other with following pipeline equipment), and the inlet with multiplexer 13 respective wavelength links to each other, and the output port of multiplexer 12 links to each other with output optical fibre 112.Generally speaking, another port of output optical fibre and other functional module (as, the protection of outlet side is switched) link to each other; The direction of arrow is the torrent of light direction among the figure.
Dual-fibre bidirectional loop network has begun to enter experimental stage at present, and the structure of dual-fibre bidirectional loop network as shown in Figure 2.Wherein, A-E is an Optical Add/Drop Multiplexer.The direction of arrow among the figure is represented the direction of torrent of light.The Optical Add Drop Multiplexer that is used for dual-fibre bidirectional loop network (OADM) the module principle structure of having reported as shown in Figure 3.Compared to Figure 1, obviously form by two independently two fine one-way type OADM modules.The deficiency that it exists is conspicuous.At first: adopted two independently modules, structure is too fat to move, does not meet the trend of miniaturization development.The second, increased cost, the 3rd, this structure is limited to the tenability of dynamic wavelength route, is not suitable for the requirement of intelligent optical node of future generation.
The objective of the invention is for overcoming the weak point of prior art, propose a kind of Optical Add Drop Multiplexer (OADM) module that is used for dual-fibre bidirectional loop network.This module can be supported 8 optical wavelength that meet the I-TUT standard of every Optical Fiber Transmission, the maximum 10Gbit/s of single wave speed; Ability with 16 wavelength of dynamic-configuration is supported the dynamic routing function of intelligent optical node light wave of future generation; And it is simple in structure, practical.
The present invention proposes a kind of dual-fibre bidirectional loop network OADM module, its structure as shown in Figure 4, comprise: first input optical fibre 41, first output optical fibre 42, second input optical fibre 43, second output optical fibre 44, road array of photoswitch 451 about in the of first, road array of photoswitch 452 about in the of second is characterized in that also comprising: the integrated waveguide array grating 46 of symmetry, first single wave optical signal channel group 47 of first input optical fibre 41, second single wave optical signal channel group 48 of second input optical fibre 43; Annexation between these assemblies is as follows: an end of said first input optical fibre 41 and second input optical fibre 43 in use with other functional module (as, module is switched in the input side protection) link to each other, another port links to each other with the integrated waveguide array grating 46 of symmetry; First single wavelength light signalling channel group 47 of integrated waveguide array grating one side that this is symmetrical and second single wavelength light signalling channel group 48 respectively with road array of photoswitch 451 about in the of first with after road array of photoswitch 452 links to each other about in the of second, turn back to the input port of the AWG opposite side of symmetry; Said first output optical fibre 42 links to each other with the output of the integrated waveguide array grating of symmetry with an end of second output optical fibre 44, an end and other functional module (as, module is switched in the outlet side protection) link to each other.
The principle of module of the present invention is as follows: from wavelength division multiplexing (WDM) light signal that input optical fibre 41 and input optical fibre 43 enter, be connected to the integrated waveguide array grating 46 of a symmetry.Deliver to road array of photoswitch 452 and array of photoswitch 451 up and down respectively by single wave optical signal channel group 47 of input optical fibre 41 and single wave optical signal channel group 48 of input optical fibre 43 behind the demultiplexing.These two array of photoswitch all have following function: 1, the lightwave signal on this underground road of Dynamic Selection, and it is delivered to the light signal port that needs; 2, the local optical signal of setting out on a journey; 3, non-local signal is straight-through; 4, intersected again through the following road of Dynamic Selection signal, descended the road then.
Signal is intersected again through the following road of Dynamic Selection, just descends the road then.The present invention has guaranteed the support of this module to intelligent light wave dynamic routing.Reason is summarized as follows: the optical-fiber network medium wavelength is valuable resource, in order to make full use of this resource, reduce the obstruction of network wavelength etc. simultaneously, will in optical cross connection node, introduce wavelength shifter, therefore will not satisfy based on wavelength condition for continuous between sourcesink: at the source end, it is λ that the signal of setting out on a journey is carried on wavelength
1Light signal on; At Su Duan, signal may be carried on the light signal of another wavelength.If following road light is not intersected, then descend the road signal to cause connection by mistake to correct port by down to wrong port road signal cross down.
Single wave optical signal of process array of photoswitch 452 and array of photoswitch 451 is respectively by being connected to symmetrical integrated waveguide array grating 46 once more through single wave optical signal channel group 47 of input optical fibre 41 and single wave optical signal channel group 48 of input optical fibre 43, after multiplexing, respectively from output optical fibre 42 and output optical fibre 44 outputs.
Effect of the present invention:
This module has realized the dual-fibre bidirectional loop optical node required kinetic energy in road up and down.The maximum transfer capacity of this OADM module support is: 8 wavelength of every Optical Fiber Transmission, and wavelength interval 200GHz, centre wavelength satisfies the ITU-T standard.The maximum rate of each wavelength is 10Gbit/s.
This modular structure can be dynamically 8 road signals up and down, routing configuration is simple compact flexibly.Crosstalk less than 35dB, Power penalty is less than 0.1dB.
This module is linked into electronic equipment again to after the road signal is carried out intersection down.This function makes the OADM module support the dynamic routing of intelligent optical-fiber network of future generation.
Brief Description Of Drawings:
Fig. 1 is the typical structure schematic diagram of existing single fiber bi-directional OADM.
Fig. 2 is the typical structure schematic diagram of existing dual-fibre bidirectional loop network OADM.
Fig. 3 forms the OADM theory structure schematic diagram that is used for dual-fibre bidirectional loop for two independently two fine one-way type OADM modules of existing usefulness.
Fig. 4 is a dual-fibre bidirectional loop network of the present invention OADM modular structure schematic diagram.
Fig. 5 dual-fibre bidirectional loop network of the present invention embodiment module diagram of OADM.
Fig. 6 is the structural representation of the array of photoswitch of present embodiment.
A kind of dual-fibre bidirectional loop network of the present invention's design with OADM embodiment module as shown in Figure 5.This module mainly is made up of integrated waveguide array grating AWG and array of photoswitch S1, the S2 of the A0818GPMSS type symmetry of Japanese NEL company.The structure of array of photoswitch is made up of 2 * 2 array of photoswitch SA and 8 * 8 optical switch S as shown in Figure 6.2 * 2 array of photoswitch SA are the TOS2M8S type thermo-optic switch array of NEL company, and 8 * 8 optical switch S are the OMM8 * 8-2 micro-mechanical-optical switch of U.S. OMM company.Wherein: L1-L8 is one group of input port of array of photoswitch SA, is made up of an input port of each 2 * 2 optical switch that constitutes 2 * 2 array of photoswitch respectively.The another one input port of each 2 * 2 optical switch of 2 * 2 array of photoswitch has been formed 8 signal port a1-a8 that set out on a journey (they are labeled as A1, A2 by unification in Fig. 5).When 2 * 2 array of photoswitch are under the pass-through state, the output port of L1-L8 is labeled as R1-R8, as one group of output port of 2 * 2 array of photoswitch.Another group output port of 2 * 2 array of photoswitch links to each other with the input port of 8 * 8 optical switches respectively.The output port d1-d8 of 8 * 8 optical switches (their in Fig. 5 by unified D1, the D2 of being labeled as), continuous with following road signalling arrangement or the optical fiber that links to each other with following road signalling arrangement.
The composition of present embodiment and annexation are described in detail as follows in conjunction with Fig. 5, Fig. 6:
The 8th port of input optical fibre F1 and symmetrical arrayed-waveguide grating A3 left side links to each other, and 8 wavelength signals light that then transmit among the input optical fibre F1 are demultiplexed to this grating right side port 10,12,14,16,18,2,4,6 respectively.No. 17 port of input optical fibre F2 and symmetrical arrayed-waveguide grating A3 right side links to each other, and 8 wavelength signals light that then transmit among the input optical fibre F2 are demultiplexed to this grating left side port one, 3,5,7,9,11,13,15,17 respectively.With optical fiber these single ripple flashlights are linked to each other with L1, L2, L3, L4, L5, L6, L7, the L8 of array of photoswitch shown in Figure 6 with optical fiber respectively.The array of photoswitch structure is made up of one 2 * 2 array of photoswitch and one 8 * 8 optical switch, and the light path between them connects the optical fiber form that adopts.
The R1 of road array of photoswitch S1, R2, R3, R4, R5, R6, R7, R8 link to each other with 9,11,13,15,1,3,5,7 ports on symmetrical arrayed-waveguide grating right side respectively up and down, by the multiplexing effect of grating, export through output optical fibre F4 from this grating left side port 9.
The R1 of road array of photoswitch S2, R2, R3, R4, R5, R6, R7, R8 link to each other with 10,12,14,16,18,2,4,6 ports in symmetrical arrayed-waveguide grating left side respectively up and down, by the multiplexing effect of grating, export through output optical fibre F3 from this grating right side port 18.
The connection of light path all adopts optical fiber to connect.
Claims (2)
1, a kind of dual-fibre bidirectional loop network OADM module, comprise: first input optical fibre, first output optical fibre, second input optical fibre, second output optical fibre, road array of photoswitch about in the of first, road array of photoswitch about in the of second is characterized in that also comprising: the integrated waveguide array grating of symmetry, first single wave optical signal channel group of first input optical fibre, second single wave optical signal channel group of second input optical fibre; Said first input optical fibre links to each other with the integrated waveguide array grating of symmetry with an end of second input optical fibre; First single wavelength light signalling channel group of integrated waveguide array grating one side that this is symmetrical and second single wavelength light signalling channel group respectively with road array of photoswitch about in the of first with after the road array of photoswitch links to each other about in the of second, turn back to the input port of the AWG opposite side of symmetry; Said first output optical fibre links to each other with the output of the integrated waveguide array grating of symmetry with an end of second output optical fibre.
2, dual-fibre bidirectional loop network as claimed in claim 1 OADM module, it is characterized in that, said first and second up and down road array of photoswitch structure forms the light path connection employing optical fiber form between them by one 2 * 2 array of photoswitch and one 8 * 8 optical switch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN01118467A CN1316844A (en) | 2001-06-01 | 2001-06-01 | Optical split and multiplexer module for dual-fibre bidirectional loop network |
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| CN01118467A CN1316844A (en) | 2001-06-01 | 2001-06-01 | Optical split and multiplexer module for dual-fibre bidirectional loop network |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100372274C (en) * | 2003-03-21 | 2008-02-27 | 华为技术有限公司 | Two-way add and drop multiplexer module |
| CN103731227A (en) * | 2014-01-03 | 2014-04-16 | 桂林市光隆光电科技有限公司 | Novel bidirectional optical add-drop multiplexer |
| CN104521163A (en) * | 2012-05-30 | 2015-04-15 | 瑞典爱立信有限公司 | Resilience in an access subnetwork ring |
-
2001
- 2001-06-01 CN CN01118467A patent/CN1316844A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100372274C (en) * | 2003-03-21 | 2008-02-27 | 华为技术有限公司 | Two-way add and drop multiplexer module |
| CN104521163A (en) * | 2012-05-30 | 2015-04-15 | 瑞典爱立信有限公司 | Resilience in an access subnetwork ring |
| CN103731227A (en) * | 2014-01-03 | 2014-04-16 | 桂林市光隆光电科技有限公司 | Novel bidirectional optical add-drop multiplexer |
| CN103731227B (en) * | 2014-01-03 | 2016-06-29 | 桂林光隆光电科技股份有限公司 | A kind of Novel bidirectional optical add-drop multiplexer |
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