CN1441272A - Configurable optical access multiplexer - Google Patents
Configurable optical access multiplexer Download PDFInfo
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- CN1441272A CN1441272A CN 02105181 CN02105181A CN1441272A CN 1441272 A CN1441272 A CN 1441272A CN 02105181 CN02105181 CN 02105181 CN 02105181 A CN02105181 A CN 02105181A CN 1441272 A CN1441272 A CN 1441272A
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Abstract
The configurable optical access multiplexer includes one first and one second inputs, one first and one second outputs, one optical unit and one change-over unit. The first input is used to receive multiple wavelength light signal including one to be picked up; and the second input is used to receive light signal to be plugged in. The optical unit has reflecting and filtering area including the first reflector and the first filter to separate the light signal to be pickup. The change-over unit makes the multiple wavelength light signal and the light signal to be plugged in transmit to the reflecting area, where they are reflected to the first output and the second output separately, or the filtering area, where they are separated for output from the first output and the second output separately.
Description
Technical field
The present invention relates to a kind of optical access multiplexer, relate in particular to a kind of configurable optical access multiplexer (Reconfigurable Optical Add/Drop Multiplexer, ROADM).
Background technology
In optical-fiber network, (Optical Add/Drop Multiplexer is that light signal with specific wavelength captures in multiple wavelength optical signal OADM) to optical access multiplexer, and another light signal of filling in same wavelength is to the multi-wavelength light signal.For example, optical access multiplexer can capture light signal to a LAN of a specific wavelength from the backbone of fiber optic network, and will fill in to backbone from the light signal of the same wavelength of LAN.So, can make the signal transferring structure of whole fiber optic network have more elasticity.
In optical access multiplexer, configurable optical access multiplexer (Reconfigurable OpticalAdd/Drop Multiplexer, ROADM) can whether carry out filling in and capturing of light signal by the external command adjustment, and adjust the wavelength desire the light signal filling in and capture.In the prior art, a kind of configurable optical access multiplexer is divided into a plurality of specific wavelength light signals with received multiple wavelength optical signal earlier after receiving multiple wavelength optical signal.Then, wavelength optical signals is transmitted on different optical waveguide components, and each optical waveguide components is connected to the light signal that one 2 * 2 photoswitch (2 * 2 optical switch) switches the desire acquisition.The adjustable configurable optical access multiplexer shortcoming of this kind is its complex structure, for the light signal that captures specific wavelength need be used a plurality of wave filters and photoswitch, and the expensive and assembling difficulty height of cost.
Another kind of adjustable configurable optical access multiplexer of the prior art is to utilize a plurality of Bragg gratings (Bragg grating) to capture the light signal of different specific wavelengths.By switching between different Bragg grating of a plurality of cycles, the adjustable configurable optical access multiplexer of this kind can be adjusted desire acquisition and the wavelength of filling in.Yet, except still using the photoswitch, the adjustable configurable optical access multiplexer of this kind the still need light signal that uses light circulator (optical circulator) to separate to be input to Bragg grating and light signal so cost and all reductions of assembling difficulty from the Bragg grating reflection.
Summary of the invention
At the problems referred to above, the purpose of this invention is to provide a kind of configurable optical access multiplexer, it can solve the expensive and high problem of assembling difficulty of above-mentioned cost.
The invention provides a kind of configurable optical access multiplexer, it comprises a first input end, one second input end, one first output terminal, one second output terminal, optical devices and a switching device shifter.First input end receives a multiple wavelength optical signal, and it comprises desire acquisition light signal (to-be-dropped optical signal); Second input end then receives a wavelength and fills in light signal (to-be-added optical signal) with identical the desiring of desire acquisition light signal.Optical devices have an echo area and a filtering district, and comprise one first reverberator and a wave filter, and this first reverberator is arranged at echo area and filtering district, and wave filter then is arranged at the filtering district, and can separate desire acquisition light signal from multiple wavelength optical signal.Switching device shifter make multiple wavelength optical signal with desire to fill in light signal be incident to echo area and filtering district one of them.When being incident to the echo area, multiple wavelength optical signal with desire to fill in light signal one of them is incident to first reverberator at least, and multiple wavelength optical signal and desire to fill in light signal one of them is reflected onto first output terminal, another then is reflected onto second output terminal.When being incident to the filtering district, multiple wavelength optical signal is incident to wave filter, after wave filter separates multiple wavelength optical signal and desire acquisition light signal, desire acquisition light signal is from the output of one of first output terminal and second output terminal, desire acquisition light signal multiple wavelength optical signal in addition then with desire to fill in light signal another output from first output terminal and second output terminal.
Switching device shifter can be the linear motion device of a mobile optical device.It is incident to echo area or filtering district by changing the relative position of optical devices with first input end, second input end, first output terminal and second output terminal, switching multiple wavelength optical signal and desire to fill in light signal.
Switching device shifter also can comprise a rotatable sheet glass, it is arranged between optical devices and first input end, second input end, first output terminal and second output terminal, and be incident to echo area or filtering district by changing multiple wavelength optical signal and the refraction side-play amount of desiring to fill in light signal, switching multiple wavelength optical signal and desire to fill in light signal.
Optical devices can also comprise one second reverberator, it is arranged in the echo area, when multiple wavelength optical signal when desiring to fill in light signal and be incident to the echo area, multiple wavelength optical signal with desire to fill in one of light signal and be incident to first reverberator, and be reflected onto second output terminal, multiple wavelength optical signal with desire to fill in light signal another then be incident to second reverberator, and be reflected onto second output terminal.
Optical devices can comprise a sheet glass, and it has one first optical flat and one second optical flat.First reverberator plates or fits in first optical flat of this sheet glass, and wave filter then plates or fit in second optical flat of this sheet glass.
First input end, second input end, first output terminal and second output terminal can be provided with abreast.At this moment, one the 3rd reverberator can be arranged in the configurable optical access multiplexer, will reflexing to second reverberator or the wave filter from the multiple wavelength optical signal of first input end, and will from second input end desire fill in light signal and reflex to first reverberator.
Because configurable optical access multiplexer proposed by the invention structure is comparatively simple and mobile component is less, so cost can be comparatively cheap and assembles difficulty and can be lowered.
Description of drawings
The present invention is described in detail below in conjunction with drawings and Examples:
Figure 1A to Fig. 1 E is a synoptic diagram, shows the structure according to the configurable optical access multiplexer of first embodiment of the invention;
Fig. 2 A to Fig. 2 D is a synoptic diagram, shows the structure according to the configurable optical access multiplexer of second embodiment of the invention;
Fig. 3 A to Fig. 3 D is a synoptic diagram, shows the structure according to the configurable optical access multiplexer of third embodiment of the invention;
Fig. 4 is a synoptic diagram, shows another form according to the configurable optical access multiplexer of third embodiment of the invention;
Fig. 5 A to Fig. 5 B is a synoptic diagram, shows another form according to configurable optical access multiplexer of the present invention.
Symbol description among the figure:
10 optical devices
11 sheet glass
111 first optical flats
112 second optical flats
The 112a echo area
112b filtering district
113 optical flats
114 optical flats
12 first reverberators
13 second reverberators
14 wave filters
15 the 3rd reverberators
16 prisms
20 switching device shifters
21 step motor
22 gear casees
23 lead screws
24 nuts
25 sheet glass
The In1 first input end
In2 second input end
Out1 first output terminal
Out2 second output terminal
Embodiment
Hereinafter with reference to relevant drawings, the configurable optical access multiplexer according to preferred embodiment of the present invention is described, wherein components identical will be illustrated with identical reference marks.
First embodiment
Please refer to Figure 1A to Fig. 1 E, comprise a first input end In1, one second input end In2, one first output terminal Out1, one second output terminal Out2, optical devices 10 and a switching device shifter 20 according to the configurable optical access multiplexer of first embodiment of the invention.Optical devices 10 have comprised a sheet glass 11, one first reverberator 12, one second reverberator 13 and a wave filter 14.
First input end In1 receives one and has comprised the multiple wavelength optical signal of wavelength from λ 1 to λ n, and the light signal that its medium wavelength is λ 1 is a desire acquisition light signal.The second input end In2 then receive a wavelength be λ 1 desire to fill in light signal λ 1 '.
Please refer to Fig. 1 E, in the present embodiment, sheet glass 11 has first optical flat 111 parallel to each other and one second optical flat, 112, the second optical flats 112 can further be divided into an echo area 112a and a filtering district 112b again.First reverberator 12 can be a reflectance coating, its plating or fit in first optical flat 111, and the total reflection of wideband light signal can be provided.Second reverberator 13 is ad-hoc locations that echo area 112a was fitted or be plated on to optics, and also can be a reflectance coating that the total reflection of wideband light signal is provided.Wave filter 14 also can be the filtering film of fitting or being plated on ad-hoc location among the filtering district 112b.
In the present embodiment, switching device shifter 20 can be any linear actuating device that can change optical devices 10 and input/output terminal relative position.For example, switching device shifter 20 can adopt the combination of step motor 21, gear case 22, lead screw 23 and a nut 24 of using always shown in Figure 1A to 1D.Its technology contents and other equivalent substitute technology are well known to those skilled in the art, so locate to repeat no more.
Figure 1A and Figure 1B have shown multiple wavelength optical signal λ 1 to λ n and have desired to fill in the situation that light signal λ 1 ' incides echo area 112a.When inciding echo area 112a, multiple wavelength optical signal λ 1 to λ n can be reflexed to the first output terminal Out1 by second reverberator 13, desire to fill in light signal λ 1 ' and then can be incident to sheet glass 11, and after in sheet glass 11, being reflected by first reverberator 12, second reverberator 13 and first reverberator 12 in regular turn, penetrate sheet glass 11 and also arrive the second output terminal Out2.
Fig. 1 C and Fig. 1 D have shown multiple wavelength optical signal λ 1 to λ n and have desired to fill in the situation that light signal λ 1 ' incides filtering district 112b.Because in the present embodiment, wave filter 14 can be the light signal of λ 1 by wavelength, so when multiple wavelength optical signal λ 1 to λ n was incident to filtering district 112b, desire acquisition light signal λ 1 can separate in multiple wavelength optical signal by filtered device 14.Filtered device 14 after separatings, desire acquisition light signal λ 1 can pass through sheet glass 11, and is reflexed to the second output terminal Out2 by first reverberator 12.
After desiring to fill in light signal λ 1 ' and inciding filtering district 112b, can be incident to sheet glass 11, and in sheet glass 11, be reflexed to wave filter 14 by first reverberator 12.Because wave filter 14 can be the light signal of λ 1 by wavelength, can pass through wave filter 14 so desire to fill in light signal λ 1 ', and arrive the first output terminal Out1 with light signal λ 2 to the λ n of filtered device 14 reflections.
Be noted that in the present embodiment, desire acquisition light signal can be other wavelength with the wavelength of desiring to fill in light signal, and is not required to be the light signal that the multiple wavelength optical signal medium wavelength is λ 1.In other words, can pass through the filtering of different wavelengths device via being provided with, the disclosed configurable optical access multiplexer of present embodiment can capture and fill in wavelength optical signals.In addition, except that mobile optical device 10, also removable input end and output terminal are to change the position that light is incident to optical devices.
In addition, but wave filter 14 also reflection wavelength be the light signal of λ 1.So, as multiple wavelength optical signal λ 1 to λ n and when desiring to fill in light signal λ 1 ' and inciding filtering district 112b, desire acquisition light signal λ 1 can be from first output terminal Out1 output, light signal λ 2 to λ n with desire to fill in light signal λ 1 ' and then can export from the second output terminal Out2.So, the signal of two networks can be switched mutually.
Second embodiment
Please refer to Fig. 2 A to Fig. 2 D, compare with first embodiment, except that switching device shifter, remaining element is all identical with first embodiment according to second embodiment of the invention.
In a second embodiment, there is no relative motion between input/output terminal and the optical devices.In other words, configurable optical access multiplexer does not use the combination of step motor 21, gear case 22, lead screw 23 and nut 24 as switching device shifter, but adopts a sheet glass 25 as switching device shifter.Sheet glass 25 changes light and injects refraction side-play amount behind the sheet glass 25 and switch light and be incident to echo area or filtering district.
Please refer to Fig. 2 A and Fig. 2 B, when sheet glass 25 is in one first angle, multiple wavelength optical signal λ 1 to λ n and desire to fill in the refraction of light signal λ 1 ' via sheet glass 25 after, can incide echo area 112a.With first embodiment similarly, multiple wavelength optical signal λ 1 to λ n can be reflexed to the first output terminal Out1 by second reverberator 13, desire to fill in light signal λ 1 ' and then can be incident to sheet glass 11, and after in sheet glass 11, being reflected by first reverberator 12, second reverberator 13 and first reverberator 12 in regular turn, penetrate sheet glass 11 and also arrive the second output terminal Out2.
Please refer to Fig. 2 C and Fig. 2 D, when sheet glass 25 is in one second angle, multiple wavelength optical signal λ 1 to λ n and desiring fill in light signal λ 1 ' can refraction via sheet glass 25 after, can incide filtering district 112b.With first embodiment similarly, when multiple wavelength optical signal λ 1 to λ n was incident to filtering district 112b, desire acquisition light signal λ 1 can separate in multiple wavelength optical signal by filtered device 14.Filtered device 14 after separatings, desire acquisition light signal λ 1 can pass through sheet glass 11, and is reflexed to the second output terminal Out2 by first reverberator 12.Desire to fill in light signal λ 1 ' and then be incident to sheet glass 11, and in sheet glass 11, reflexed to wave filter 14 by first reverberator 12.Because wave filter 14 can be the light signal of λ 1 by wavelength, can pass through wave filter 14 so desire to fill in light signal λ 1 ', and arrive the first output terminal Out1 with light signal λ 2 to the λ n of filtered device 14 reflections.
The 3rd embodiment
Please refer to Fig. 3 A to Fig. 3 D, in the 3rd embodiment, each input end and output terminal system are provided with in parallel to each other, 10 of optical devices are to be provided with obliquely with respect to sheet glass 25, that is, in the situation shown in Fig. 3 A, sheet glass 11 is not to be provided with in parallel to each other with sheet glass 25.
Configurable optical access multiplexer according to the 3rd embodiment has also comprised one the 3rd reverberator 15.The 3rd reverberator 15 can be a catoptron, and its reflection is from first input end In1 and multiple wavelength optical signal λ 1 to the λ n by sheet glass 25, and from the second input end In2 and desire to fill in light signal λ 1 ' by sheet glass 25.
Please refer to Fig. 3 A and Fig. 3 B, when sheet glass 25 with multiple wavelength optical signal λ 1 to λ n when desiring to fill in light signal λ 1 ' and refract to echo area 112a, multiple wavelength optical signal λ 1 to λ n with desire to fill in light signal λ 1 ' and can be incident to the 3rd reverberator 15 earlier.The 3rd reverberator 15 reflexes to second reverberator 13 of optical devices 10 with multiple wavelength optical signal λ 1 to λ n, and will desire to fill in first reverberator 12 that light signal λ 1 ' reflexes to optical devices 10.
Multiple wavelength optical signal λ 1 to λ n can be reflexed to the first output terminal Out1 by second reverberator 13, desire to fill in light signal λ 1 ' then after being incident to sheet glass 11, reflected by first reverberator 12, second reverberator 13 and first reverberator 12 in regular turn, and penetrate the sheet glass 11 arrival second output terminal Out2.
Please refer to Fig. 3 C and Fig. 3 D, when sheet glass 25 with multiple wavelength optical signal λ 1 to λ n when desiring to fill in light signal λ 1 ' and refract to filtering district 112b, multiple wavelength optical signal λ 1 to λ n with desire to fill in light signal λ 1 ' and also can be incident to the 3rd reverberator 15 earlier.The 3rd reverberator 15 reflexes to the wave filter 14 of optical devices 10 with multiple wavelength optical signal λ 1 to λ n, and will desire to fill in first reverberator 12 that light signal λ 1 ' reflexes to optical devices 10.
When multiple wavelength optical signal λ 1 to λ n was incident to wave filter 14, desire acquisition light signal λ 1 can be separated in multiple wavelength optical signal, reflexes to the second output terminal Out2 by sheet glass 11 and by first reverberator 12 then.After desiring to fill in light signal λ 1 ' and being incident to sheet glass 11, can be reflexed to wave filter 14 by first reverberator 12.Owing to wave filter 14 can be the light signal of λ 1 by wavelength, can pass through wave filter 14 so desire to fill in light signal λ 1 ', and pass through to arrive the first output terminal Out1 with light signal λ 2 to the λ n of filtered device 14 reflections.
In the present embodiment, the shaped design of sheet glass 11 need cooperate the light direct of travel of each light signal.Yet the position on this space and other element are related, and the situation of the visual reality of those skilled in the art and demand are done suitable adjustment to the position of each element, or under the situation that does not exceed spirit of the present invention and category, change the configuration and the design of each element.
For example, Figure 4 shows that the situation that adds behind the high penetration prism 16.The 3rd reverberator 15 can be the reflectance coating that is plated on or fits on the high penetration prism 16, and second reverberator 13 and wave filter 14 (wave filter 14 does not show in Fig. 4) then can be the reflectance coating that is plated between high penetration prism 16 and the sheet glass 11.
More than with a plurality of embodiment structure according to configurable optical access multiplexer of the present invention has been described.According to the present invention, configurable optical access multiplexer simply optical facilities comes filling in of switching optical path and captures action.Therefore, make with the cost of assembling and significantly to reduce.
Yet those skilled in the art can carry out the modification and the change of equivalence to above-mentioned content, and do not exceed spirit of the present invention and category.For example, compare with Figure 1B with Figure 1A, Fig. 5 A and Fig. 5 B are depicted as among the echo area 112a of optical devices 10 second reverberator 13 are not set, and only are provided with the situation of first reverberator 12.According to this kind design, when inciding first echo area, multiple wavelength optical signal λ 1 to λ n can be incident to sheet glass 11, and is reflexed to the second output terminal Out2 by first reverberator 12 in sheet glass 11.Desire to fill in light signal λ 1 ' and then can be incident to sheet glass 11, and in sheet glass 11, reflexed to the first output terminal Out1 by first reverberator 12.
So the above only is an illustrative, but not be restricted.Anyly do not break away from spirit of the present invention and category, and, all should be contained in the protection domain of this patent its equivalent modifications of carrying out or change.
Claims (10)
1. a configurable optical access multiplexer is characterized in that, comprises:
One first input end, it receives a multiple wavelength optical signal, and this multiple wavelength optical signal comprises desire acquisition light signal;
One second input end; It receives a wavelength and fills in light signal with identical the desiring of this desire acquisition light signal;
One first output terminal;
One second output terminal;
One optical devices, it has one first optical flat and one second optical flat, wherein this first optical flat has an echo area and a filtering district, and these optical devices comprise one first reverberator and a wave filter, this first reverberator is arranged at this second optical flat, this wave filter then is arranged at this filtering district, and can separate this desire acquisition light signal from this multiple wavelength optical signal
One switching device shifter, its make this multiple wavelength optical signal and this desire to fill in light signal be incident to this echo area and this filtering district one of them,
When being incident to this echo area, this multiple wavelength optical signal and this desire to fill in light signal one of them is incident to this first reverberator at least, and this multiple wavelength optical signal and this are desired to fill in light signal one of them are reflected onto this first output terminal, and another then is reflected onto this second output terminal
When being incident to this filtering district, this multiple wavelength optical signal is incident to this wave filter, after this wave filter separates this multiple wavelength optical signal and this desire acquisition light signal, this desire acquisition light signal is from the output of one of this first output terminal and this second output terminal, and this multiple wavelength optical signal beyond this desire acquisition light signal then desires to fill in light signal another output from this first output terminal and this second output terminal with this.
2. configurable optical access multiplexer according to claim 1, it is characterized in that: this switching device shifter is a linear motion device, it is by the relative position that changes these optical devices and this first input end, this second input end, this first output terminal and this second output terminal, switches this multiple wavelength optical signal and this and desires to fill in light signal and be incident to one of this echo area and this filtering district.
3. configurable optical access multiplexer according to claim 2 is characterized in that: this switching device shifter is to move these optical devices, or moves this first input end, this second input end, this first output terminal and this second output terminal.
4. configurable optical access multiplexer according to claim 1, it is characterized in that: this switching device shifter comprises a rotatable sheet glass, it is arranged between these optical devices and this first input end, this second input end, this first output terminal and this second output terminal, and, switch this multiple wavelength optical signal and this and desire to fill in light signal and be incident to one of this echo area and this filtering district by changing this multiple wavelength optical signal and this desires to fill in the refraction side-play amount of light signal.
5. configurable optical access multiplexer according to claim 1, it is characterized in that: these optical devices also comprise one second reverberator, it is arranged in this echo area, when this multiple wavelength optical signal and this are desired to fill in light signal and are incident to this echo area, this multiple wavelength optical signal and this are desired to fill in one of light signal and are incident to this first reverberator, and be reflected onto this first output terminal, this multiple wavelength optical signal and this desire to fill in light signal another then be incident to this second reverberator, and be reflected onto this second output terminal.
6. configurable optical access multiplexer according to claim 1, it is characterized in that: these optical devices comprise a sheet glass, wherein this first optical flat and this second optical flat respectively row be formed at the two opposite sides of this sheet glass, and this first reverberator plates or fits in this first optical flat, and this wave filter then plates or fit in this filtering district of this second optical flat.
7. configurable optical access multiplexer according to claim 1 is characterized in that: this wave filter reflects this desire acquisition light signal, and by this multiple wavelength optical signal beyond this desire acquisition light signal; And
When this multiple wavelength optical signal and this were desired to fill in light signal and be incident to this filtering district, this desire acquisition light signal was from this first output terminal output, and this multiple wavelength optical signal beyond this desire acquisition light signal then desires to fill in light signal from this second output terminal output with this.
8. configurable optical access multiplexer according to claim 1 is characterized in that: this wave filter captures light signal by this desire, and reflects this multiple wavelength optical signal beyond this desire acquisition light signal; And
When this multiple wavelength optical signal and this were desired to fill in light signal and be incident to this filtering district, this desire acquisition light signal was from this second output terminal output, and this multiple wavelength optical signal beyond this desire acquisition light signal then desires to fill in light signal from this first output terminal output with this.
9. configurable optical access multiplexer according to claim 1, it is characterized in that: also comprise: one the 3rd reverberator, it will and be desired to fill in light signal from this of this second input end from this multiple wavelength optical signal of this first input end and reflex to this optical devices.
10. configurable optical access multiplexer according to claim 9 is characterized in that: also comprise: a prism, the 3rd reverberator plates or fits in this prism, and this wave filter is arranged between this prism and this optical devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02105181 CN1217213C (en) | 2002-02-25 | 2002-02-25 | Configurable optical access multiplexer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02105181 CN1217213C (en) | 2002-02-25 | 2002-02-25 | Configurable optical access multiplexer |
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| Publication Number | Publication Date |
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| CN1441272A true CN1441272A (en) | 2003-09-10 |
| CN1217213C CN1217213C (en) | 2005-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 02105181 Expired - Fee Related CN1217213C (en) | 2002-02-25 | 2002-02-25 | Configurable optical access multiplexer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103718486A (en) * | 2013-09-14 | 2014-04-09 | 华为技术有限公司 | Optical device, device and optical network system |
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2002
- 2002-02-25 CN CN 02105181 patent/CN1217213C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103718486A (en) * | 2013-09-14 | 2014-04-09 | 华为技术有限公司 | Optical device, device 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 |
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| Publication number | Publication date |
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| CN1217213C (en) | 2005-08-31 |
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