CN203799055U - Comb-type filter - Google Patents
Comb-type filter Download PDFInfo
- Publication number
- CN203799055U CN203799055U CN201420201371.1U CN201420201371U CN203799055U CN 203799055 U CN203799055 U CN 203799055U CN 201420201371 U CN201420201371 U CN 201420201371U CN 203799055 U CN203799055 U CN 203799055U
- Authority
- CN
- China
- Prior art keywords
- mirror
- unit
- different
- input
- grating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000007493 shaping process Methods 0.000 claims abstract description 17
- 230000003287 optical effect Effects 0.000 claims abstract description 8
- 239000013307 optical fiber Substances 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 10
- 238000004891 communication Methods 0.000 abstract description 6
- 238000011161 development Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical group CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
Landscapes
- Optical Couplings Of Light Guides (AREA)
Abstract
The utility model relates to the field of optical communication device, and discloses a comb-type filter, which comprises an input/output unit, a light beam shaping unit, an optical grating, a lens group and an array reflector which are sequentially arranged, wherein the array reflector comprises a plurality of groups of reflector units at different angles, and the groups of reflector units at different angles are alternatively arranged; and the input/output unit comprises an input collimator and a plurality of output collimators. By adopting the combination of the optical grating and the array reflector, the cross wavelength multiplexing comb-type filter is realized, the structure is simple, the debugging is convenient, the implement is easy, and the cost is low.
Description
Technical field
The utility model relates to optical communication device field, relates in particular to a kind of comb filter.
Background technology
Along with the fast development of optical-fibre communications, in past 10 years, the demand of information capacity and transmission speed is increased with surprising rapidity.Since dwdm system application in 1996, various DWDM devices are also at continuous research and development with in improving.Interleaver(comb filter) be exactly a kind of DWDM wave-dividing device with superiority wherein.Interleaver device is a kind of crossover wavelength multiplexer for optical-fibre communications field (being also comb filter), the basic function that it can be realized is: the signal of adjacency channel frequency interval C is from input end input, becoming frequency by interleaver Interleaver device isolation is strange, even two groups of signals of 2C, respectively from two port outputs.
Along with the fast development of optical-fibre communications, interleaver Interleaver is as the core devices of dwdm system, and people have higher requirement to its performance.At present, the interleaver Interleaver device that optical communication field is used has three types, Mach-Zehnder(Mach Zeng De) three kinds of interferometer, Fabry-Perot interferometer and crystal-types.Mach-Zehnder interferometer needs accurately to control the length of two optical fiber, and its technique has been proposed to very high requirement; Fabry-Perot interferometer adopts resonator cavity to improve live width, and effect is limited, and owing to having used etalon structure dispersion differences, and contrast is restricted simultaneously; And crystal-type utilizes crystal more, expensive.
Summary of the invention
The purpose of this utility model is to propose a kind of comb filter, adopts grating to be combined with array mirror, and simple in structure, debugging is convenient, be easy to realize, and cost is lower.
For achieving the above object, the technical scheme the utility model proposes is: a kind of comb filter, comprise the input-output unit, beam shaping unit, grating, lens combination and the array mirror that set gradually, described array mirror comprises the mirror unit that two or more sets angles are different, two or more sets mirror unit alternative arrangements of different angles; Described input-output unit comprises input collimating apparatus and multiple output collimator; Incident light through the incident of input collimating apparatus incides on grating after the shaping of beam shaping unit, converged on array mirror through lens combination by the light beam after optical grating diffraction, the light beam at different diffraction angle incides on different mirror units, after the different mirror unit reflection of angle, pass through successively lens combination, grating and beam shaping unit, the light beam being reflected by different angles mirror unit is afterwards exported through the different output collimator of input-output unit respectively again.
Further, the horizontal direction angle difference of each group of mirror unit of the mirror unit that described two or more sets angles are different, vertical direction angle is consistent; Described multiple output collimator is in same level.
Or the horizontal direction angle of each group of mirror unit of the mirror unit that described two or more sets angles are different is consistent, vertical direction angle difference; Described multiple output collimator is on same vertical plane.
Further, input-output unit is made up of a multiple optical fiber collimating, or is made up of a multiple optical fiber collimating and a single optical fiber calibrator, or is made up of multiple single optical fiber calibrators.
Further, described beam shaping unit is the beam-expanding system of two cylindrical mirror compositions, or the beam-expanding system of two spherical lens compositions, or the beam-expanding system of a spherical lens and a non-spherical lens composition.
Further, described grating is transmission-type grating or reflection-type grating.
Further, described lens combination is spherical lens or cylindrical mirror, or the combination of spherical lens and cylindrical mirror.
The beneficial effects of the utility model are: adopt grating to be combined with array mirror, realize the multiplexing comb filter of crossover wavelength, simple in structure, debugging is convenient, be easy to realize, and cost is lower.
Brief description of the drawings
Fig. 1 is 1 × 2 comb filter principle schematic;
Fig. 2 is embodiment mono-1 × 2 comb filter structural representations;
Fig. 3 is embodiment 21 × 2 comb filter structural representations;
Fig. 4 is Fig. 3 structure A direction view;
Fig. 5 is Fig. 3 structure B direction view;
Fig. 6 is the array mirror structural representation adopting in embodiment mono-;
Fig. 7 is the array mirror structural representation adopting in embodiment bis-;
Fig. 8 is 1 × 3 comb filter principle schematic;
Fig. 9 is the array mirror structural representation that embodiment 31 × 3 comb filter adopt.
Reference numeral: 10, input-output unit; 11, input collimating apparatus; 12, even passage output collimator; 13, strange passage output collimator; 20, beam-expanding system; 30, grating; 40, lens combination; 50, array mirror.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described further.
The utility model adopts grating to be combined with array mirror, realizes the multiplexing comb filter of crossover wavelength, simple in structure, and debugging is convenient, be easy to realize, and cost is lower.Concrete, this comb filter comprises the input-output unit, beam shaping unit, grating, lens combination and the array mirror that set gradually.Wherein, array mirror comprises the mirror unit that two or more sets angles are different, two or more sets mirror unit alternative arrangements of different angles; Input-output unit comprises input collimating apparatus and multiple output collimator; Incident light through the incident of input collimating apparatus incides on grating after the shaping of beam shaping unit, converged on array mirror through lens combination by the light beam after optical grating diffraction, the light beam at different diffraction angle incides on different mirror units, after the different mirror unit reflection of angle, pass through successively lens combination, grating and beam shaping unit, the light beam being reflected by different angles mirror unit is afterwards exported through the different output collimator of input-output unit respectively again.As shown in Figure 1, taking 1 × 2 comb filter as example, realize the signal of adjacency channel frequency interval C from the input of input collimating apparatus, by being separated into strange, even two groups of signals that frequency interval is 2C after this comb filter, respectively from exporting strange passage output collimator and the output of even passage output collimator.
Concrete, taking 1 × 2 comb filter of Fig. 2 and 6 illustrated embodiments one as example, as shown in Figure 6, and the different mirror unit horizontal direction angle difference of array mirror 50 its two groups of angles that this embodiment adopts, vertical direction angle is consistent.Taking 6 signalling channels as example, frequency interval is that the signal of C is inputted and collimated from the input collimating apparatus 11 of input-output unit 10, after expanding through beam-expanding system 20 again, incide on grating 30, through the diffraction of grating 30, the flashlight of different passages (different wave length) is with different angle of diffraction outgoing.Wherein, the lens combination 40 between grating 30 and array mirror 50, equals its focal distance f 3 to the distance of grating 30, also equals its focal distance f 3 to the distance of array mirror 50.Diffracted beam converges on array mirror 50 through lens combination 40, the flashlight angle of diffraction difference of different passages, through parallel inciding in mirror units different on array mirror 50 after lens combination 40, as shown in Figure 2, be from left to right followed successively by ch1, ch2 ... ch6 signal.The flashlight angle of diffraction difference of same channels, through being converged onto after lens combination 40 on array mirror 50 in same reflection mirror unit.Due to the different mirror unit horizontal direction angle difference of these array mirror 50 its two groups of angles, vertical direction angle is consistent, and two groups of mirror unit alternative arrangements that angle is different, incide mirror unit that mirror unit that strange passage on array mirror 50 is corresponding and even passage are corresponding towards difference, mirror unit corresponding to odd passage towards identical, mirror unit corresponding to all even passages is towards identical.So this array mirror 50 reflects strange channel signal and even channel signal respectively in the horizontal direction towards different directions, by horizontally separated to strange channel signal and even channel signal.The strange channel signal light being reflected back and even channel signal light converge to respectively the diverse location on grating 30 again after lens combination 40 focuses on, three points on grating 30 as shown in Figure 2, the even channel signal light, incident light that represents to be respectively reflected back, the position of the strange channel signal light being reflected back on grating 30.The strange channel signal light being reflected back and even channel signal light are oppositely through being spaced apart respectively strange channel signal light and the even channel signal light of 2C by strange passage output collimator 13 and even passage output collimator 12 output frequencies after beam-expanding system 20 shapings.
In this embodiment, due to the different mirror unit horizontal direction angle difference of array mirror 50 its two groups of angles, by horizontally separated to strange channel signal and even channel signal, so the even passage output collimator 12 of input-output unit 10 and strange passage output collimator 13 are in same level, horizontal mode is arranged.
Embodiment bis-as shown in Fig. 3-5 and 7, different from embodiment mono-, the mirror unit horizontal direction angle that array mirror 50 its two groups of angles that this embodiment adopts are different is consistent, vertical direction angle difference, as shown in Figure 7.As shown in Figure 5, this array mirror 50 separates the strange channel signal of incident and even channel signal at vertical direction, so the even passage output collimator 12 of the input-output unit 10 of this embodiment and strange passage output collimator 13 are on same vertical plane, arrange in vertical mode, as shown in Figure 4, the strange channel signal light of output and even channel signal light separate at vertical direction.
In the embodiment of above-mentioned 1 × 2 comb filter, input-output unit can be made up of three optical fiber collimators, or is made up of a double-fiber collimator and a single optical fiber calibrator, or is made up of three single optical fiber calibrators.
Be illustrated in figure 8 the principle schematic of embodiment 31 × 3 comb filter, realize the signal of adjacency channel frequency interval C from the input of input collimating apparatus, by being separated into three groups of signals that frequency interval is 3C after this comb filter, respectively from three output collimator outputs.
The concrete structure of this 1 × 3 comb filter can be identical with embodiment mono-or two, and different is adopted array mirror, comprises three groups of mirror units that angle is different, and input-output unit comprises input collimating apparatus and three output collimators.The horizontal direction angle difference of each group mirror unit, vertical direction angle is consistent, and each output collimator is in same level, or it is consistent respectively to organize the horizontal direction angle of mirror unit, vertical direction angle difference; Each output collimator is on same vertical plane.Wherein, input-output unit can be made up of four optical fiber collimators, or is made up of three optical fiber collimators and a single optical fiber calibrator, or is made up of four single optical fiber calibrators
As shown in Figure 9, array mirror 50 in this embodiment is made up of one group of prism facets, form three groups of mirror units that horizontal direction angle is different, the light signal of incident is divided into three groups of flashlights that angle is different in the horizontal direction, so each output collimator of the input-output unit of this embodiment is in same level, arrange in a horizontal manner, three groups of flashlights of output separate in the horizontal direction.
Equally, also can be by comb filter such as one group of multifaceted prism compositions 1 × 4,1 × 5.
In the various embodiments described above, beam shaping unit can be the beam-expanding system of two cylindrical mirror compositions, and the spacing between two cylindrical mirrors equals the focal length sum f1+f2 of these two cylindrical mirrors; Or the beam-expanding system of two spherical lens compositions, the spacing between two spherical lenses equals the focal length sum f1+f2 of these two spherical lenses; Or the beam-expanding system of a spherical lens and a non-spherical lens composition, the spacing between spherical lens and aspheric mirror lens equals the focal length sum f1+f2 of the two.What the grating in the various embodiments described above adopted is transmission-type grating, also can adopt reflection-type grating.Lens combination can be spherical lens or cylindrical mirror, or the combination of spherical lens and cylindrical mirror.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; but those skilled in the art should be understood that; not departing from the spirit and scope of the present utility model that appended claims limits; the various variations of in the form and details the utility model being made, are protection domain of the present utility model.
Claims (7)
1. a comb filter, comprise the input-output unit, beam shaping unit, grating, lens combination and the array mirror that set gradually, it is characterized in that: described array mirror comprises the mirror unit that two or more sets angles are different two or more sets mirror unit alternative arrangements of different angles; Described input-output unit comprises input collimating apparatus and multiple output collimator; Incident light through the incident of input collimating apparatus incides on grating after the shaping of beam shaping unit, converged on array mirror through lens combination by the light beam after optical grating diffraction, the light beam at different diffraction angle incides on different mirror units, after the different mirror unit reflection of angle, pass through successively lens combination, grating and beam shaping unit, the light beam being reflected by different angles mirror unit is afterwards exported through the different output collimator of input-output unit respectively again.
2. comb filter as claimed in claim 1, is characterized in that: the horizontal direction angle difference of each group of mirror unit of the mirror unit that described two or more sets angles are different, and vertical direction angle is consistent; Described multiple output collimator is in same level.
3. comb filter as claimed in claim 1, is characterized in that: the horizontal direction angle of each group of mirror unit of the mirror unit that described two or more sets angles are different is consistent vertical direction angle difference; Described multiple output collimator is on same vertical plane.
4. comb filter as described in claim 1-3 any one, is characterized in that: input-output unit is made up of a multiple optical fiber collimating, or is made up of a multiple optical fiber collimating and a single optical fiber calibrator, or is made up of multiple single optical fiber calibrators.
5. comb filter as described in claim 1-3 any one, it is characterized in that: described beam shaping unit is the beam-expanding system of two cylindrical mirror compositions, or the beam-expanding system of two spherical lens compositions, or the beam-expanding system of a spherical lens and a non-spherical lens composition.
6. comb filter as described in claim 1-3 any one, is characterized in that: described grating is transmission-type grating or reflection-type grating.
7. comb filter as described in claim 1-3 any one, is characterized in that: described lens combination is spherical lens or cylindrical mirror, or the combination of spherical lens and cylindrical mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420201371.1U CN203799055U (en) | 2014-04-24 | 2014-04-24 | Comb-type filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420201371.1U CN203799055U (en) | 2014-04-24 | 2014-04-24 | Comb-type filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203799055U true CN203799055U (en) | 2014-08-27 |
Family
ID=51381259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420201371.1U Expired - Lifetime CN203799055U (en) | 2014-04-24 | 2014-04-24 | Comb-type filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203799055U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105785514A (en) * | 2014-12-26 | 2016-07-20 | 福州高意通讯有限公司 | Flat-top optical filter |
| CN107966749A (en) * | 2017-12-12 | 2018-04-27 | 武汉邮电科学研究院 | Optical comb filter based on super surfacing |
| CN115166908A (en) * | 2022-07-22 | 2022-10-11 | 光信(徐州)电子科技有限公司 | Dense wavelength division multiplexer |
-
2014
- 2014-04-24 CN CN201420201371.1U patent/CN203799055U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105785514A (en) * | 2014-12-26 | 2016-07-20 | 福州高意通讯有限公司 | Flat-top optical filter |
| CN107966749A (en) * | 2017-12-12 | 2018-04-27 | 武汉邮电科学研究院 | Optical comb filter based on super surfacing |
| CN107966749B (en) * | 2017-12-12 | 2019-06-21 | 武汉邮电科学研究院 | Optical comb filter based on super surfacing |
| CN115166908A (en) * | 2022-07-22 | 2022-10-11 | 光信(徐州)电子科技有限公司 | Dense wavelength division multiplexer |
| CN115166908B (en) * | 2022-07-22 | 2023-10-10 | 光信(徐州)电子科技有限公司 | Dense wavelength division multiplexer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103969745B (en) | A kind of bandwidth levelling top-type optical filter based on DLP | |
| CN104678515B (en) | For the optical device light channel structure of single fiber bi-directional | |
| CN205280985U (en) | Parallel emission of light subassembly of multichannel wavelength | |
| CN102033312B (en) | Tunable optical filter based on MEMS (micro electro mechanical system) technology | |
| CN203502625U (en) | Novel wavelength division multiplexing optical device and novel wavelength division de-multiplexing optical device | |
| CN107003483A (en) | Photoswitch | |
| CN102608708B (en) | Wavelength-adjustable optical filter | |
| CN203799055U (en) | Comb-type filter | |
| CN104076450A (en) | BOSA (Bi-Di Optical Subassembly) optical structure used for high-speed receiving and transmitting system | |
| CN204462461U (en) | For the optical device light channel structure of single fiber bi-directional | |
| CN103364879A (en) | A flat-top optical filter with adjustable bandwidth | |
| CN202720386U (en) | Fiber delay line with adjustable light | |
| CN202948203U (en) | Bandwidth-adjustable flat-top type optical filter | |
| CN109917516A (en) | A kind of compact wavelength division multiplexer | |
| CN204269923U (en) | A kind of photoswitch | |
| CN203502618U (en) | Multipath wavelength division multiplexer | |
| CN112782862A (en) | Optical module of multi-wavelength composite wave | |
| CN104090362A (en) | Tunable flat top narrow-band type optical fiber based on MEMS | |
| CN109212766A (en) | A kind of light-dividing device, wavelength-selective switches and light-splitting method | |
| CN102208737A (en) | Tunable multi-wavelength generation unit | |
| CN103091787B (en) | Adjustable optical attenuator and adjustable optical attenuator wavelength division multiplexer | |
| CN105785515A (en) | Flat-top optical filter having adjustable bandwidth | |
| CN101504474B (en) | Comb-shaped ribbon filter | |
| CN104570220A (en) | Wavelength division multiplexer array | |
| CN106291822A (en) | A kind of wavelength-selective switches |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140827 |
|
| CX01 | Expiry of patent term |