CN2687966Y - Odd-even cross multiplexing device - Google Patents
Odd-even cross multiplexing device Download PDFInfo
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- CN2687966Y CN2687966Y CNU032245890U CN03224589U CN2687966Y CN 2687966 Y CN2687966 Y CN 2687966Y CN U032245890 U CNU032245890 U CN U032245890U CN 03224589 U CN03224589 U CN 03224589U CN 2687966 Y CN2687966 Y CN 2687966Y
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- multiplexing device
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- phase delay
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Abstract
The utility model discloses an odd-even cross multiplexing device, aiming to provided an odd-even cross multiplexing device which has low production cost and can simplify the assembling of the communication system. The input-output device of the odd-even cross multiplexing device comprises six single-optical-fiber collimators (17, 18, 19, 20, 21, 22), and a steering device is composed of corner cube prisms (9, 10); a light-splitting device A for polarized lights, a wave plate combination M, phase delay plates (4, 5), a wave plate combination N and a light-splitting device B for the polarized lights are arranged between the input-output device and the steering device. The odd-even cross multiplexing device can be used in optical-fiber communication field.
Description
Technical field
The utility model relates to a kind of odd-even interleaving multiplexing device (interleaver) that is used for optical-fibre communications field.
Background technology
The odd-even interleaving multiplexing device is a kind of interleaver that is used for optical-fibre communications field, the basic function that it can be realized is: the adjacency channel frequency interval is that the modulated laser signal of T is imported from input port, be separated into strange, two groups of signals of idol that frequency interval is 2T by the odd-even interleaving multiplexing device, through two output port outputs.Along with the fast development of optical-fibre communications, communication flows is doubled and redoubled, and people are increasing to the data bandwidth demand.The odd-even interleaving multiplexing device is as the core devices of dwdm system, and people are to its demands for higher performance.At present, the odd-even interleaving multiplexing device that optical-fibre communications field uses has polytype, the odd-even interleaving multiplexing device that employing birefringence filtering method commonly used is made, it has an input port and two output ports, and its structure comprises input/output unit and transfer, and is arranged at the some optical elements between the two, such structure fabrication cost height, when communication system need use a plurality of odd-even interleaving multiplexing devices to assemble, make that the communication system assembling is complicated, the assembly cost height.
The utility model content
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, a kind of odd-even interleaving multiplexing device with two input ports and four output ports is provided, this odd-even interleaving multiplexing device cost of manufacture is relatively low, and can simplify the assembling of communication system.
The technical scheme that the utility model adopted is: the utility model comprises input/output unit and transfer, described input/output unit comprises three single fiber collimaters, described transfer comprises and turns to device P, between described input/output unit and transfer, be disposed with polarised light splitter spare A, wave plate combined M, phase delay chip, another phase delay chip, wave plate combined N, polarised light splitter spare B, described wave plate combined M comprises a slice sheet glass and three wave plates, described input/output unit also comprises three single fiber collimaters in addition, described transfer also comprises and turns to device Q, described wave plate combined M also to comprise in addition two wave plates.
Between described wave plate combined M and described phase delay chip, also be provided with 1/4 wavelength wave plate, between described another phase delay chip and wave plate combined N, also be provided with 1/2 wavelength wave plate.
Described polarised light splitter spare A is birefringece crystal or wollaston prism or PBS prism; Described wave plate combined N is made up of sheet glass and wave plate, or is made up of two wave plates; Described polarised light splitter spare B is birefringece crystal or wollaston prism or PBS prism; The described device P that turns to is right-angle prism or isotropic optical media spheroid or isotropic optical media cylinder; The described device Q that turns to is right-angle prism or isotropic optical media spheroid or isotropic optical media cylinder.
The beneficial effects of the utility model are: the utility model turns to device and two wave plates owing to only increased by one of three single fiber collimater, just realized the input of two ports, the output of four ports, possessed two traditional port inputs, therefore the function of the odd-even interleaving multiplexing device of two ports output can reduce the cost of manufacture of odd-even interleaving multiplexing device relatively and can simplify the assembling of communication system; For the technical scheme that is provided with 1/4 wavelength wave plate and 1/2 wavelength wave plate, the utility model can also directly carry out once more partial wave and need not increase extra device two groups of strange, even passages of the ITU point deviation T/2 of previous stage odd-even interleaving multiplexing device output, thereby can further simplify the communication apparatus structure and reduce cost.
Description of drawings
Fig. 1 is the utility model embodiment 1 optical texture and light path schematic diagram;
Fig. 2 is the utility model embodiment 2 optical textures and light path schematic diagram.
Embodiment
Embodiment 1
As shown in Figure 1, input/output unit of the present utility model comprises six single fiber collimaters 17,18,19,20,21,22, export by single fiber collimater 17,19 after separating from the laser of single fiber collimater 18 inputs, export by single fiber collimater 20,22 after separating from the laser of single fiber collimater 21 inputs, certainly, described single fiber collimater 17,18,19,20,21,22 also can substitute with suitable double-fiber collimator; Transfer of the present utility model comprises and turns to device P and turn to device Q, and turning to device P is right-angle prism 9, and turning to device Q is right-angle prism 10, and certainly, turning to device P, turn to device Q can be the isotropic optical media spheroid also, as glass marble; The utility model is disposed with polarised light splitter spare A, wave plate combined M between input/output unit and transfer, length is the phase delay chip 4 of L, phase delay chip 5, wave plate combined N, the polarised light splitter spare B that length is 2L, wherein, polarizing optics A is a birefringece crystal 1, polarised light splitter spare B is a birefringece crystal 6, and birefringece crystal 1,6 also can substitute with suitable wollaston prism; Wave plate combined M comprises sheet glass 2, wave plate 3, wave plate 16, wave plate 15, wave plate 14 and wave plate 13; Wave plate combined N is made up of sheet glass 7 and wave plate 8, can certainly be made up of two suitable wave plates; Described L is a length-specific value by the decision of factors such as input Wavelength of Laser and adjacency channel frequency interval T.
The utility model basic principle is as described below:
From the laser of single fiber collimater 21 input by behind the birefringece crystal 1, be separated into the vertical polarised light in two bundle polarization directions, respectively by sheet glass 2, wave plate 3, the two-beam polarization direction identifies, by phase delay chip 4,5, design makes two-beam (all comprise strange, the polarization state of certain the group passage two groups of signals of idol) is constant, another group is then revolved and is turn 90 degrees, every like this Shu Guang has become the combination of the light of two polarization state quadratures, pass through sheet glass 7 respectively, separate by the light of birefringece crystal 6 again behind the wave plate 8 different polarization states, become four bundle light, the two-beam polarization state of same group of passage this moment (strange or even passage) is parallel to each other, turn to through right-angle prism reflection and translation after, again by birefringece crystal 6, the wherein light beam straight-line pass of one group of passage, the light beam of another group passage is by translation once more, the light beam of two groups of passages passes through in turn by sheet glass 7 again afterwards, the wave plate combined N that wave plate 8 is formed, phase delay chip 5, behind the phase delay chip 4, wherein the two-beam of one group of passage is through sheet glass 2, become the orthogonal two-beam of polarization state behind wave plate 3 and the wave plate 16, close light through birefringece crystal 1 then, by 22 outputs of single fiber collimater, the two-beam of another group passage is through sheet glass 2, become the orthogonal two-beam of polarization state behind wave plate 3 and the wave plate 15, close light through birefringece crystal 1 then, by 20 outputs of single fiber collimater.
Pass through identical device from the laser of single fiber collimater 18 inputs along the direction of the laser parallel of importing from single fiber collimater 21, after passing through birefringece crystal 6, turn to and translation by right-angle prism 10 reflections, afterwards in turn by birefringece crystal 6, wave plate combined N, phase delay chip 5, phase delay 4, the four bundle light that are separated into, wherein the two-beam of one group of passage becomes the orthogonal two-beam of polarization state behind glass 2, wave plate 3 and wave plate 14, close light through birefringece crystal 1 then, by 19 outputs of single fiber collimater; The two-beam of another group passage becomes the orthogonal two-beam of polarization state behind sheet glass 2, wave plate 3 and wave plate 13, close light through birefringece crystal 1 then, by 17 outputs of single fiber collimater.
Thus, present embodiment is with two traditional port inputs, and two ports output Interleaver device concentrates in the Interleaver device, realizes the input of two ports, the output of four ports.
The assembly structure of present embodiment is: optical element is installed in the shell, and fixedlys connected with shell by certain position relation, and the optical fiber tail end of described single fiber collimater 17,18,19,20,21,22 stretches out outside the shell.
As shown in Figure 2, be provided with 1/4 wavelength wave plate 12 between wave plate combined M and the phase delay chip 4, between phase delay chip 5 and wave plate combined N, be provided with 1/2 wavelength wave plate 11.All the other structures are identical with embodiment 1.
By the adjacency channel frequency interval of single fiber collimater 21 incidents be the modulated laser signal of T be separated into frequency interval be strange, the even signal of 2T through 20,22 outputs of single fiber collimater, the optical element that it passed through is identical with embodiment 1; Compare with embodiment 1, increased by 1/4 wavelength wave plate 12 and 1/2 wavelength wave plate 11 owing to be separated into strange, even signal through the light path of single fiber collimater 17,19 outputs, therefore can realize adjacency channel frequency interval by 18 incidents of single fiber collimater to be T but ITU point be separated into frequency interval with respect to the modulated laser signal by the modulated laser signal bias T/2 of single fiber collimater 21 incidents to be that strange, the even signal of 2T is exported through double- fiber collimator 17,19 by the laser signal of single fiber collimater 18 incidents.
Thus, the odd-even interleaving multiplexing device that present embodiment can depart from T/2 with a traditional odd-even interleaving multiplexing device and ITU point concentrates in the odd-even interleaving multiplexing device, realizes the input of two ports, the output of four ports.
Embodiment 3:
Described polarised light splitter spare A, polarised light splitter spare B are the PBS prisms; It is described that to turn to device P, turn to device Q be the isotropic optical media cylinder.All the other structures are identical with embodiment 1 or embodiment 2.
The utility model polarization spectro and Multiplexing apparatus have adopted same device, therefore in order to reduce PMD numerical value, can also additionally increase compensating plate in light path.
The utility model is by being provided with the single fiber collimater in more input/output units, and turns to wave plate among device and the wave plate combined M in the corresponding increase transfer, can also expand to the odd-even interleaving multiplexing device of more input/output ports.
Claims (3)
1, a kind of odd-even interleaving multiplexing device, comprise input/output unit and transfer, described input/output unit comprises three single fiber collimaters (20,21,22), described transfer comprises and turns to device P, between described input/output unit and transfer, be disposed with polarised light splitter spare A, wave plate combined M, phase delay chip (4), phase delay chip (5), wave plate combined N, polarised light splitter spare B, described wave plate combined M comprises sheet glass (2), wave plate (3), wave plate (16) and wave plate (15), it is characterized in that, described input/output unit also comprises three single fiber collimaters (17 in addition, 18,19), described transfer also comprises and turns to device Q, described wave plate combined M also to comprise wave plate (14) and wave plate (13).
2, a kind of odd-even interleaving multiplexing device according to claim 1, it is characterized in that, between described wave plate combined M and phase delay chip (4), also be provided with 1/4 wavelength wave plate (12), between described phase delay chip (5) and wave plate combined N, also be provided with 1/2 wavelength wave plate (11).
3, a kind of odd-even interleaving multiplexing device according to claim 1 and 2 is characterized in that, described polarised light splitter spare A is birefringece crystal (1) or wollaston prism or PBS prism; Described wave plate combined N is made up of sheet glass (7) and wave plate (8), or is made up of two wave plates; Described polarised light splitter spare B is birefringece crystal (6) or wollaston prism or PBS prism; The described device P that turns to is right-angle prism (9) or isotropic optical media spheroid or isotropic optical media cylinder; The described device Q that turns to is right-angle prism (10) or isotropic optical media spheroid or isotropic optical media cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032245890U CN2687966Y (en) | 2003-03-28 | 2003-03-28 | Odd-even cross multiplexing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032245890U CN2687966Y (en) | 2003-03-28 | 2003-03-28 | Odd-even cross multiplexing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2687966Y true CN2687966Y (en) | 2005-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU032245890U Expired - Fee Related CN2687966Y (en) | 2003-03-28 | 2003-03-28 | Odd-even cross multiplexing device |
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| CN (1) | CN2687966Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646757A (en) * | 2017-03-07 | 2017-05-10 | 昂纳信息技术（深圳）有限公司 | Multiplexer and light-combining method thereof |
-
2003
- 2003-03-28 CN CNU032245890U patent/CN2687966Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646757A (en) * | 2017-03-07 | 2017-05-10 | 昂纳信息技术（深圳）有限公司 | Multiplexer and light-combining method thereof |
| CN106646757B (en) * | 2017-03-07 | 2021-01-26 | 昂纳信息技术（深圳）有限公司 | Multiplexer and light combination method thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |