CN1119680C - Single-fibre bidirectional optical split and complexer module - Google Patents
Single-fibre bidirectional optical split and complexer module Download PDFInfo
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- CN1119680C CN1119680C CN 01118466 CN01118466A CN1119680C CN 1119680 C CN1119680 C CN 1119680C CN 01118466 CN01118466 CN 01118466 CN 01118466 A CN01118466 A CN 01118466A CN 1119680 C CN1119680 C CN 1119680C
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Abstract
The present invention belongs to the technical field of optical communication, and is composed of a first optical fiber, a second optical fiber, a first circulator, a second circulator and an OADM module for double-fiber bidirectional annular networks, wherein the output ports A, C of the first circulator and the second circulator are respectively connected with the OADM module for double-fiber bidirectional annular networks. The module of the present invention supports each optical fiber to transmit eight wavelengths in a single direction; the wavelength interval is 200GHz; the central wavelength satisfies the ITU-T standard. The maximal speed of each wavelength signal is 10 Gbit/s. The present invention is suitable for DWDM systems for single-fiber bidirectional transmission, has the characteristics of flexible configuration and simple structure, and supports next-generation OADM dynamic routing.
Description
Technical field the invention belongs to the optical communication technology field, particularly the structural design of single fiber bi-directional OADM module.
Background technology is along with the development of Fibre Optical Communication Technology, the technology of transmission bidirectional optical signal is constantly perfect in the single optical fiber, the report of existing site test, therefore necessary for optical signal design, development Optical Add Drop Multiplexer (OADM) module of single fiber bi-directional transmission.
The report of external existing two-way OADM module, primary structure as shown in Figure 1 and Figure 2.OADM module shown in Fig. 1 (a) is made up of multiplexer 15, array of photoswitch 171-174, demodulation multiplexer 13.Optical fiber links to each other with demodulation multiplexer, and demodulation multiplexer is by linking to each other with array of photoswitch by optical fiber, and array of photoswitch links to each other with demodulation multiplexer by optical fiber.The array of photoswitch of its core is shown in Fig. 1 (b).The input port fiber L of switch 171 links to each other with the wavelength channel of multiplexer, demodulation multiplexer respectively with R; Two other port of switch 171, one links to each other with an input port of switch 172, and the output port with Erbium-Doped Fiber Amplifier (EDFA) 16 links to each other.The input port of Erbium-Doped Fiber Amplifier (EDFA) 16 links to each other with an output port of switch 172; Another input port of switch 172 is done to link to each other as setting out on a journey signal port with optical fiber A; Switch 172 another output ports link to each other with optical fiber D as following road signal port.The principle of work of analysis chart 1, the OADM module that can find this structure has proposed restriction to the wavelength of road light signal up and down: the light signal of the identical wavelength of both direction transmission can not be simultaneously road up and down.This characteristic limitations the dirigibility of network organizing, thereby also limited the occasion that this OADM uses.In addition, though taked photoswitch can realize dynamic-configuration, its tenability to the dynamic wavelength route is limited.
Two-way OADM module shown in Figure 2 is made up of circulator CT1, CT2, CT3, CT4, two Erbium-Doped Fiber Amplifier (EDFA)s (EDFA) E1, E2 and two independently reflective add-drop multiplexing module A1, A2.Their annexation is as follows: CT1 links to each other with circuit optical fiber 11,12 with the input end of CT2; CT1 links to each other with the input end of CT3, CT4 respectively with the output terminal of CT2, distribution of the output terminal of CT3, CT4 links to each other with reflective add-drop multiplexing module A1, A2, input end with E1, E2 links to each other, and the output terminal of E1, E2 links to each other with the output terminal of CT2, CT1 respectively.Connect and adopt optical fiber.Its principle of work can be summarized as follows, CT1 separates the direction that the transmitted in both directions signal transmits in the OADM module with CT2, signal after the separation by optical fiber respectively with after CT3, CT4 link to each other, enter two nested structures identical reflective two fine one-way type OADM modules A 1, A2, link to each other with Erbium-Doped Fiber Amplifier (EDFA) (EDFA) E1, E2 by circulator CT3, CT4 after finishing the add drop multiplex function, remedy the loss of light, output terminal by E1, E2 links to each other with circulator CT2, CT1 then, closes in ripple to an optical fiber with the opposite direction transmission signals and transmits.Analyze the principle of work of this structure, can find: this complex structure, cost height; Adopted reflection configuration, made this module, be unfavorable for the raising of this module performance the inhibition ability drop of reflecting background; Support the limited in one's ability of light wave dynamic routing, thereby also be difficult to adapt to the needs of following Intelligence Network Development.
Summary of the invention the objective of the invention is to propose a kind of single fiber bi-directional OADM module for overcoming the weak point of prior art, and module of the present invention is supported 8 wavelength of every optical fiber one-way transmission, wavelength interval 200GHz, and centre wavelength satisfies the ITU-T standard.The maximum rate of each wavelength signals is 10Gbit/s.The dwdm system that is applicable to single fiber bi-directional transmission with, have flexible configuration, support OADM dynamic routing of future generation, a characteristic of simple structure.
A kind of single fiber bi-directional OADM module that the present invention proposes, its structure is made up of with OADM module 35 first optical fiber 31, second optical fiber 32, first circulator 33, second circulator 34, dual-fibre bidirectional loop network as shown in Figure 3; The input end B of said first circulator 33 and second circulator 34 in use respectively with other functional module (switching module) as protection, their output port A, C links to each other with the OADM module with said two fine looped networks respectively.
The principle of the dual-fibre bidirectional loop network usefulness OADM module that the present invention adopts 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, 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: said first input optical fibre 41 links to each other with the output terminal C of circulator in use with an end of second input optical fibre 43, and 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 terminal of the integrated waveguide array grating of symmetry with an end of second output optical fibre 44, and an end links to each other with another output port A of circulator.
The above-mentioned dual-fibre bidirectional loop network principle of OADM module:
From wavelength-division multiplex (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, the signal of setting out on a journey is carried on the light signal that wavelength is λ 1; 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.
The principle of unidirectional two-way OADM module of the present invention is described as follows in conjunction with Fig. 3, Fig. 4:
The signal that optical fiber 31 is propagated from left to right, and the signal of propagating from right to left in the optical fiber 32 are linked into the B port of circulator 33 and circulator 34 respectively, all from their C port output.Circulator 33 links to each other with input optical fibre 43 with the input optical fibre 41 of the two-way OADM module of two fibres respectively with the C port of circulator 34, light signal in the two-way OADM module of two fibres the dynamic wavelength route, up and down behind the road, output optical fibre 42 and output optical fibre 44 by the two-way OADM module of two fibres, hold in link to each other incoming fiber optic 32 and the optical fiber 31 with the A of circulator 33 with circulator 34 respectively, thus the road up and down of having realized the transmitted in both directions signal.
Effect of the present invention:
This OADM module has realized the add drop multiplex function of single fiber bi-directional transmission signals.The maximum transfer capacity of its support is: 8 wavelength of every optical fiber one-way transmission, and wavelength interval 200GHz, centre wavelength satisfies the ITU-T standard.The maximum rate of each wavelength signals 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 then descended the road to descending the road signal to intersect earlier, makes this module support the dynamic routing of intelligent optical-fiber network of future generation.
Description of drawings
Fig. 1 is structure () synoptic diagram of existing two-way OADM module.
Wherein (a) is the OADM modular structure, (b) is optical switch construction.
Fig. 2 is structure (two) synoptic diagram of existing two-way OADM module.
Fig. 3 is a single fiber bi-directional OADM module structural representation of the present invention.
Fig. 4 is a dual-fibre bidirectional loop network of the present invention OADM modular structure synoptic diagram.
Fig. 5 is a single fiber bi-directional OADM module example structure synoptic diagram of the present invention.
Fig. 6 is the structural representation of the switch arrays of present embodiment.
A single fiber bi-directional OADM module example structure of embodiment the present invention's design as shown in Figure 5.This module is made up of two circulators and two fine two-way OADM modules.The PIFC23A2 that circulator C1 wherein and circulator C2 adopt E-TEK company to produce.The two-way OADM module of two fibres is made up of the A0818GPMSS type AWG and the switch arrays of Japanese NEL company.The structure of array of photoswitch is made up of 2 * 2 array of photoswitch SA and 8 * 8 photoswitch 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 photoswitch S are the OMM8x8-2 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 photoswitch that constitutes 2 * 2 array of photoswitch respectively.The another one input port of each 2 * 2 photoswitch 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 photoswitches respectively.The output port d1-d8 of 8 * 8 photoswitches (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:
Optical fiber L1 links to each other with circulator C2 with circulator C1 respectively with optical fiber L2, and Chuan Shu WDM signal is linked into input optical fibre F1 so from left to right; The WDM signal that transmits of turning left from the right side is linked into input optical fibre F2.
The 8th port of input optical fibre F1 and symmetrical arrayed-waveguide grating 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 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 switch arrays shown in Figure 5 with optical fiber respectively.
The R1 of way switch array SA, 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 F3 from this grating left side port 9.
The R1 of way switch array S, 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 F4 from this grating right side port 18.
Output optical fibre F3 links to each other with circulator C2, circulator C1 respectively with output optical fibre F4, has realized the add drop multiplex function of transmitted in both directions signal.The optical fiber ways of connecting is adopted in the connection of light path between the assembly.
Claims (3)
1, a kind of single fiber bi-directional OADM module is characterized in that, is made up of with the OADM module first optical fiber, second optical fiber, first circulator, second circulator, dual-fibre bidirectional loop network; The input end B of said first circulator and second circulator in use respectively with other functional module, their output port A, C links to each other with the OADM module with said two fine looped networks respectively.
2, single fiber bi-directional OADM module as claimed in claim 1, it is characterized in that, said 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, 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 terminal of the integrated waveguide array grating of symmetry with an end of second output optical fibre.
3, single fiber bi-directional OADM module as claimed in claim 2, 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 photoswitch.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01118466 CN1119680C (en) | 2001-06-01 | 2001-06-01 | Single-fibre bidirectional optical split and complexer module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 01118466 CN1119680C (en) | 2001-06-01 | 2001-06-01 | Single-fibre bidirectional optical split and complexer module |
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| CN1316659A CN1316659A (en) | 2001-10-10 |
| CN1119680C true CN1119680C (en) | 2003-08-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100372274C (en) * | 2003-03-21 | 2008-02-27 | 华为技术有限公司 | Two-way add and drop multiplexer module |
| KR100474695B1 (en) | 2003-05-12 | 2005-03-10 | 삼성전자주식회사 | Bidirectoinal optical add/drop multiplexer for wavelength division multiplexing optical networks |
| CN109510685B (en) * | 2018-12-03 | 2020-05-05 | 武汉邮电科学研究院有限公司 | Ultra-dense wavelength division multiplexing passive optical fiber network transmission system and transmission method |
| CN111371495A (en) * | 2020-03-10 | 2020-07-03 | 深圳纤亿通科技有限公司 | Single-fiber bidirectional transmission equipment and transmission method |
| CN112254934A (en) * | 2020-10-20 | 2021-01-22 | 武汉一三光电科技有限公司 | Bidirectional test system and method for fiber grating filter |
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