SU1383266A1 - Demultiplexer - Google Patents
Demultiplexer Download PDFInfo
- Publication number
- SU1383266A1 SU1383266A1 SU864043980A SU4043980A SU1383266A1 SU 1383266 A1 SU1383266 A1 SU 1383266A1 SU 864043980 A SU864043980 A SU 864043980A SU 4043980 A SU4043980 A SU 4043980A SU 1383266 A1 SU1383266 A1 SU 1383266A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- demultiplexer
- fiber
- angle
- receiving unit
- axis
- Prior art date
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4246—Bidirectionally operating package structures
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
- G02B6/29305—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide
- G02B6/2931—Diffractive element operating in reflection
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
- G02B6/29305—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide
- G02B6/29311—Diffractive element operating in transmission
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Communication System (AREA)
Abstract
Изобретение относитс к волоконно-оптической св зи и позвол ет уменьшить уровень помех в линии и на выходе демультиплексора, вызванных вли нием случайных изменений пол ризации световой волны на сигнал демультиплексора на промежуточной станции линии св зи с частотным уп-. лотнением. В демультиплексоре внутри волоконного световода 1 размещены селективные элементы 2 и 3, развернутые относительно друг друга на угол 90 . Ответвленна часть энергии , распростран ющейс по световоду 1 световой волны, падает на приемные блоки 4 и 5. С выходов блоков 4, 5 сигналы поступают на сумматор 8. Элемент 2 выполнен в виде объемной дифракционной решетки, спаи которой наклонены под углом к оси световода 1 . Элемент 3 энергетически сопр жен с приемными блоками 6, 7, подключенными к сумматору В. 1 ил. с $3 (ЛThe invention relates to fiber-optic communication and allows reducing the level of interference in the line and at the output of the demultiplexer, caused by the effect of random changes in the polarization of the light wave on the signal of the demultiplexer at the intermediate station of the communication line with frequency. rattling. In the demultiplexer inside the optical fiber 1 placed selective elements 2 and 3, deployed relative to each other at an angle of 90. The branched portion of the energy propagating through the optical wave 1 of the light wave falls on the receiving blocks 4 and 5. From the outputs of the blocks 4, 5, the signals are sent to the adder 8. Element 2 is made in the form of a bulk diffraction grating, whose junctions are inclined at an angle to the axis of the light guide 1 . Element 3 is energetically coupled with receiving blocks 6, 7 connected to adder B. 1 Il. with $ 3 (L
Description
УHave
22
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Изобретение относитс к области волоконно-оптической св зи и может быть использовано дл демультиплексировани сигнала на промежуточных станци х.The invention relates to the field of fiber optic communication and can be used for signal demultiplexing at intermediate stations.
Цель изобретени - уменьшение уровн помех в линии и на выходе де- мультиплексора, вызванных вли нием случайных изменений Нол ризации световой волны на сигнал, вьщел емый де мультиплексором на промежуточных станци х волоконно-оптической линии св зи с частотным уплотнением.The purpose of the invention is to reduce the level of interference in the line and at the output of the de-multiplexer caused by the effect of random variations in the polarization of the light wave on the signal transmitted by the de-multiplexer at intermediate stations of a fiber-optic communication line with frequency compression.
На чертеже представлена схема де- мультиплексора.The drawing shows a de-multiplexer circuit.
Демультиплексор содержит волоконный световод 1, два селектив.ных элемента 2 и 3, расположенных последовательно друг за другом, причем элемен ты 2 и 3 развернуты один относительно другого на угол 90° вокруг оси волоконного световода. Селективньш элемент может быть, в частности, вьшол- рен в виде фазовой объемной решетки со спа ми, наклоненными под углом ot к оси волоконного световода и периодом Л сThe demultiplexer contains a fiber light guide 1, two selective elements 2 and 3 arranged in series one after another, with the elements 2 and 3 being turned one relative to the other at an angle of 90 ° around the axis of the fiber light guide. The selective element can, in particular, be outlined in the form of a phase volume grating with spans inclined at an angle ot to the axis of the optical fiber and a period of L s
Каждьй из селективных элементов 2 и 3 оптически св зан с входом соответствующих приемных блоков 4, 5 и 6,7. Выходы приемных блоков 4 - 7 свзаны с соответствующими входами сумматора 8,Each of the selective elements 2 and 3 is optically coupled to the input of the respective receiving units 4, 5 and 6.7. The outputs of the receiving blocks 4 - 7 svzany with the corresponding inputs of the adder 8,
Демультиплексор работает следующи образом.The demultiplexer works as follows.
Светова волна с длиной волны ,, распростран юща с по волоконному световоду 1, последовательно дифрагирует сначала на первом по ходу распространени селективном элементе 2, а затем на втором элементе 3. Ответвленна часть энергии падает на приемный блок 5.. Сигналы с выходов прием10The light wave with a wavelength, propagating through the optical fiber 1, first diffracts first on the first along the propagation selective element 2, and then on the second element 3. The branched portion of the energy falls on the receiving unit 5. The signals from the output outputs 10
ных блоков сумматора iadder blocks i
4 и 5 поступают на вход4 and 5 arrive at the entrance
Ф ормула изобретени Formula of invention
приемньш блок, о receiving unit, o
Демультиплексор, содержащий волоконный световод , селективный элемент типа объемной дифракционной решетки, расположенньй внутри волоконного световода под углом к его оси, и первьй тличающий- с тем, что, с целью уменьшени уровн помех в линии и на выходе де- мультиплексора при использовании его на промежуточньк станци х волоконно- оптических линий св зи с уплотнением каналов, в него дополнительно введены второй селективный элемент, расположенньй внутри волоконного световода последовательно за первым, раз- вёрнутьй относительно него на угол 90 вокруг оси волоконного световода, и энергетически сопр женньй с ним второй приемный блок и последовательно соединенньй с ним сумматор, второй вход которого соединен с выходом первого приемного блока.A demultiplexer containing a fiber, a selective element of the type of a bulk diffraction grating located inside the fiber at an angle to its axis, and the first one, so as to reduce the level of interference in the line and at the output of the multiplexer when using it on an intermediate stations of fiber-optic communication lines with channel compaction, a second selective element is additionally introduced into it, located inside the optical fiber successively behind the first one, spread out relatively neg at an angle 90 around the axis of optical fiber, and energy Gennes conjugated thereto a second receiving unit and sequentially soedinenny him adder, a second input coupled to an output of the first receiving unit.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU864043980A SU1383266A1 (en) | 1986-03-28 | 1986-03-28 | Demultiplexer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU864043980A SU1383266A1 (en) | 1986-03-28 | 1986-03-28 | Demultiplexer |
Publications (1)
Publication Number | Publication Date |
---|---|
SU1383266A1 true SU1383266A1 (en) | 1988-03-23 |
Family
ID=21228996
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU864043980A SU1383266A1 (en) | 1986-03-28 | 1986-03-28 | Demultiplexer |
Country Status (1)
Country | Link |
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SU (1) | SU1383266A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2763141A1 (en) * | 1997-05-08 | 1998-11-13 | Nec Corp | Surveillance device for monitoring signal transmission on optical fibre |
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1986
- 1986-03-28 SU SU864043980A patent/SU1383266A1/en active
Non-Patent Citations (1)
Title |
---|
- Патент US № 4474424, кл. 350-96.17. Toshba Rev., 1985, 40. № 7, с. 594-596. * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2763141A1 (en) * | 1997-05-08 | 1998-11-13 | Nec Corp | Surveillance device for monitoring signal transmission on optical fibre |
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