CN101056153A - Wave division multiplexer - Google Patents
Wave division multiplexer Download PDFInfo
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- CN101056153A CN101056153A CN 200610025729 CN200610025729A CN101056153A CN 101056153 A CN101056153 A CN 101056153A CN 200610025729 CN200610025729 CN 200610025729 CN 200610025729 A CN200610025729 A CN 200610025729A CN 101056153 A CN101056153 A CN 101056153A
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- filter plate
- division multiplexer
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- wavelength division
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Abstract
The present invention provides a wavelength division multiplexer including a plurality of filter plates each two of which are opposite with each other, a plurality of fiber collimators. The filter plates are described as the first, the second, the third, the fourth until the Nth, and the odd number sequence is opposite to the even number sequence. The light wave of a plurality of wavelengths achieves at the first filter plate through the fiber collimator when the light wave is divided; the light of the wavelength corresponding to the first filter plate is filtered out, while the light wave of other wavelength is reflected to the second filter plate opposite to the first filter plate; then the light of the wavelength corresponding to the second filter plate is filtered out, while the light wave of other wavelength is reflected to the third filter plate opposite to the first filter plate; the light of the wavelength corresponding to the third filter plate is filtered out and so on, and the whole process of wave dividing is completed as the prior steps. The wave combining of the light path can be realized when the light path is reverse according to the reversibility of light path. The wavelength division multiplexer in the present invention has low plug consumption and a low cost, and the number of the assembly parts is reduced and the density of integration of the parts is improved.
Description
Technical field
The present invention relates to a kind of optical fiber communication Passive Optical Components, particularly a kind of wavelength division multiplex device.
Background technology
Wavelength division multiplexing (WDM) technology is exactly in order to make full use of the enormous bandwidth resource that monomode fiber low-loss district brings, wavelength difference according to each channel light wave can be divided into several channels with the low-loss zoning of optical fiber, the signal carrier wave of light wave, adopt wavelength division multiplexer (wave multiplexer) that the flashlight carrier wave of different provision wavelengths is merged at transmitting terminal and send into an optical fiber and transmit.At receiving terminal, the multiplex mode that the light carrier of these different wave lengths carrying unlike signals is separated by a wavelength division multiplexer (channel-splitting filter) again.Because it is separate that the optical carrier of different wave length can be regarded as, thereby in an optical fiber, can realize the multiplexing transmission of multipath light signal, the signal of both direction is arranged in the different wave length transmission respectively can realize transmitted in both directions.
According to the difference of reuse wavelengths number, can be divided into two wavelength, three-wavelength, four wavelength ..., etc. wavelength division multiplexer.Wavelength division multiplexer is one or four wavelength division multiplexers among Fig. 1, can be that four road light waves of λ 1, λ 2, λ 3, λ 4 close ripple and partial wave to wavelength promptly.
Existing wavelength division multiplexer structure as shown in Figure 1, comprise a plurality of cascades double-fiber collimator 1, be located at the filter plate 2 of each double-fiber collimator one end, a plurality of single fiber collimaters 3.The double-fiber collimator 1 that the different wave length light wave enters by the filtering and the reflection of filter plate 2, enters corresponding single fiber collimater 3 respectively, realizes the partial wave of light wave.Shown among Fig. 1 that wavelength is the branch wave process of four road light waves of λ 1, λ 2, λ 3, λ 4, four road light waves enter a double-fiber collimator, leach the light wave that wavelength is λ 1 earlier, all the other light waves are through after reflecting, enter next double-fiber collimator, according to same principle, leaching wavelength successively is the light wave of λ 2, λ 3, λ 4.According to the light path principle of reversibility, when light path is reverse, then realize the ripple that closes of light path.This wavelength division multiplexer has following shortcoming:
1, the insertion loss is big;
2, because each cascade all produces certain loss, so the loss of several interchannels is inhomogeneous;
3, device is formed complex structure, causes Material Cost higher;
4, the device integrated level is low;
Summary of the invention
The object of the present invention is to provide a kind of high integration, the low wavelength division multiplexer of loss.
For reaching above-mentioned purpose, the present invention adopts following technical scheme:
A kind of wavelength division multiplexer comprises a plurality of filter plates, a plurality of optical fiber collimator, it is characterized in that: described filter plate is provided with in twos in opposite directions.
For ease of describing, below with first, second, third, fourth ..., the N filter plate mode filter plate is described, the filter plate of odd number sequence and the filter plate of even number sequence can be provided with in opposite directions.During partial wave, the light wave of a plurality of wavelength, through the accurate device of optical fiber, arrive first filter plate, leach the light wave of the first filter plate corresponding wavelength, the light wave of other wavelength then reflexes in addition second filter plate that is provided with in opposite directions with first filter plate, leach the light wave of the second filter plate corresponding wavelength, the light wave of other wavelength then reflexes to the 3rd filter plate, leach the light wave of the 3rd filter plate corresponding wavelength, the rest may be inferred, leach successively with the 4th ..., N filter plate corresponding wavelength light wave, thereby finish the process of partial wave.According to the light path principle of reversibility, when light path is reverse, then realize the ripple that closes of light path.
Wherein, the quantity of filter plate is more than or equal to the quantity of light wave medium wavelength.Can both therefrom leach with the light wave that guarantees each wavelength.As a kind of optimal way of the present invention, the value of the quantity N of filter plate preferably equates with the quantity of light wave medium wavelength.With the utilance of raising wavelength division multiplexer, and reduce cost.
Wherein, filter plate of the present invention can vertically be bonded on the base plate, also it can be attached at an end of optical fiber collimator, behind the incident of adjusting light wave and reflection angle, realizes filtering and reflection.As a kind of improvement of the present invention, partly or entirely be attached in the described filter plate on one or more lens, realize filtering and reflection.Preferably whole filter plates is attached at lens, realizes filtering and reflection.
As another improvement of the present invention, described lens comprise the pair of parallel limit, described filter plate is attached at respectively on this parallel opposite side.
Wherein, optical fiber collimator is under the prerequisite that satisfies the light wave incident angle, and described optical fiber collimator can be a double-fiber collimator, also can be the single fiber collimater.
Do this another improvement of the present invention, described wavelength division multiplexer also comprises one or more refracting prisms, described optical fiber collimator comprises a single fiber collimater, a plurality of double-fiber collimator, and the two-way light wave of filter plate the same side arrives double-fiber collimator behind superrefraction.Wherein, the single fiber collimater is to close the incident and the exit channel of glistening light of waves ripple.
As another optimal way of the present invention, the quantity of described filter plate is four, and the quantity of described double-fiber collimator is two.The quantity of described refracting prisms is two.
Wavelength division multiplexer provided by the invention, the insertion loss is low, and has significantly reduced the composition device, reduces cost, and improves the device integrated level.
Below in conjunction with accompanying drawing and one or four wavelength division multiplexer embodiment, further specify the present invention.
Description of drawings
Fig. 1 is existing four wave-length division drop multiplexer architectures.
Fig. 2 is the present invention four wave-length division multiplexer embodiment partial wave figure.
Fig. 3 closes ripple figure for the present invention four wave-length division multiplexer embodiment.
Embodiment
As shown in Figure 2, a kind of wavelength division multiplexer, it is one or four wave-length division multiplexers, comprise a single fiber collimater 10, four filter plates (11,12,13,14), two double-fiber collimators (16,19), two refracting prisms (17,18), lens 20, described filter plate 11 and filter plate 12, filter plate 13 is provided with in opposite directions with filter plate 14, and described lens 20 comprise the pair of parallel limit, and described filter plate (11,12,13,14) all is attached on the parallel edges of described lens 20.Make that so described four filter plates (11,12,13,14) are parallel to each other in twos, be distributed in lens 20 both sides, be used for the light of the wavelength that transmission need separate, reflect its commplementary wave length.Described prism also plays the effect of fixing four filter plates simultaneously.In addition, described two refracting prisms (17,18) are used for two light signals are carried out converging of light path or disperse.
Wherein, filter plate (11,12,13,14) is the film filter plate, and its centre of homology wavelength is respectively λ 1, λ 2, λ 3, λ 4.
Fig. 2 represents simultaneously, is the process that the incident optical signal of four road light waves of λ 1, λ 2, λ 3, λ 4 carries out partial wave to comprising wavelength.The light signal of incident is by 10 incidents of single fiber collimater, again by four filter plates (11,12,13,14) and parallel quadrant prism 20, leach λ 1, λ 2, λ 3, λ 4 four road light waves, respectively via after two refracting prisms (17,18) refraction, export again from double-fiber collimator (16,19).
Fig. 3 is the process that the incident optical signal of the light wave of λ 1, λ 2, λ 3, λ 4 closes ripple for the embodiment of the invention to four road wavelength.According to the light path principle of reversibility, when light path is reverse, then realize the ripple that closes of light path.Close the specific descriptions of ripple in this omission.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not break away from the spirit and scope of technical solution of the present invention.
Claims (9)
1, a kind of wavelength division multiplexer comprises a plurality of filter plates, a plurality of optical fiber collimator, and described filter plate is connected with the optical fiber collimator light path, it is characterized in that: described filter plate is provided with in twos in opposite directions.
2, wavelength division multiplexer according to claim 1 is characterized in that: also comprise lens, partly or entirely be attached on the described lens in the described filter plate.
3, wavelength division multiplexer according to claim 2 is characterized in that: described lens comprise the pair of parallel limit, and the described filter plate that is provided with in opposite directions in twos is attached at respectively on these two parallel opposite side.
4, wavelength division multiplexer according to claim 1 and 2 is characterized in that: the quantity of described filter plate is more than or equal to the quantity of light wave medium wavelength.
5, wavelength division multiplexer according to claim 1 is characterized in that: also comprise a base plate, described filter plate is pasted on the described base plate.
6, wavelength division multiplexer according to claim 1 is characterized in that: described filter plate is attached at an end of optical fiber collimator.
7, wavelength division multiplexer according to claim 1 is characterized in that: described optical fiber collimator middle part is divided into double-fiber collimator.
8, wavelength division multiplexer according to claim 1 and 2, it is characterized in that: also comprise one or more refracting prisms, described optical fiber collimator comprises a single fiber collimater, a plurality of double-fiber collimator, the two-way light wave of described filter plate the same side is behind superrefraction, arrive double-fiber collimator, wherein, the single fiber collimater is to close the incident and the exit channel of glistening light of waves ripple.
9, wavelength division multiplexer according to claim 1 and 2 is characterized in that: the quantity of described filter plate is four, and the quantity of described double-fiber collimator is two, and the quantity of described refracting prisms is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610025729 CN101056153A (en) | 2006-04-14 | 2006-04-14 | Wave division multiplexer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610025729 CN101056153A (en) | 2006-04-14 | 2006-04-14 | Wave division multiplexer |
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| Publication Number | Publication Date |
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| CN101056153A true CN101056153A (en) | 2007-10-17 |
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| CN 200610025729 Pending CN101056153A (en) | 2006-04-14 | 2006-04-14 | Wave division multiplexer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487890A (en) * | 2013-09-10 | 2014-01-01 | 浙江同星光电科技有限公司 | Miniature WDM |
| CN103718486A (en) * | 2013-09-14 | 2014-04-09 | 华为技术有限公司 | Optical device, device and optical network system |
| CN107045160A (en) * | 2016-12-30 | 2017-08-15 | 北极光电(深圳)有限公司 | A kind of miniature Wavelength division multiplexing module with tail optical fiber |
| CN111381324A (en) * | 2020-04-24 | 2020-07-07 | 苏州伽蓝致远电子科技股份有限公司 | Compact wavelength division device with low-loss upgrading port |
| CN112882159A (en) * | 2021-03-03 | 2021-06-01 | 南京华脉科技股份有限公司 | Integrated wavelength division multiplexer |
| WO2023024819A1 (en) * | 2021-08-23 | 2023-03-02 | 华为技术有限公司 | Optical add-drop multiplexer |
-
2006
- 2006-04-14 CN CN 200610025729 patent/CN101056153A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487890A (en) * | 2013-09-10 | 2014-01-01 | 浙江同星光电科技有限公司 | Miniature WDM |
| CN103718486A (en) * | 2013-09-14 | 2014-04-09 | 华为技术有限公司 | Optical device, device and optical network system |
| WO2015035624A1 (en) * | 2013-09-14 | 2015-03-19 | 华为技术有限公司 | Optical component, apparatus and optical network system |
| CN103718486B (en) * | 2013-09-14 | 2017-09-08 | 华为技术有限公司 | optical device, device and optical network system |
| CN107045160A (en) * | 2016-12-30 | 2017-08-15 | 北极光电(深圳)有限公司 | A kind of miniature Wavelength division multiplexing module with tail optical fiber |
| CN111381324A (en) * | 2020-04-24 | 2020-07-07 | 苏州伽蓝致远电子科技股份有限公司 | Compact wavelength division device with low-loss upgrading port |
| CN112882159A (en) * | 2021-03-03 | 2021-06-01 | 南京华脉科技股份有限公司 | Integrated wavelength division multiplexer |
| WO2023024819A1 (en) * | 2021-08-23 | 2023-03-02 | 华为技术有限公司 | Optical add-drop multiplexer |
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