CN209148986U - Optical device, the polarization converter, WSS structure of polarization are realized in WSS - Google Patents
Optical device, the polarization converter, WSS structure of polarization are realized in WSS Download PDFInfo
- Publication number
- CN209148986U CN209148986U CN201821997769.5U CN201821997769U CN209148986U CN 209148986 U CN209148986 U CN 209148986U CN 201821997769 U CN201821997769 U CN 201821997769U CN 209148986 U CN209148986 U CN 209148986U
- Authority
- CN
- China
- Prior art keywords
- polarization
- splitting prism
- light
- wss
- lens
- 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.)
- Active
Links
Landscapes
- Polarising Elements (AREA)
Abstract
The utility model discloses optical device, polarization converters, WSS structure that polarization is realized in WSS, optical device includes transparent glass, half-wave plate and polarization splitting prism, the polarization beam splitter that its exit facet is divided into top and the bottom is equipped in polarization splitting prism, transparent glass is set to the top of polarization splitting prism exit facet, half-wave plate is set to the lower part of polarization splitting prism exit facet, and the lower end surface of polarization splitting prism is equipped with reflectance coating；Pass through the combination to half-wave plate and polarization splitting prism, form a kind of novel optical device, the device can convert random polarization to the function of single polarised light, has many advantages, such as low cost, easy processing, expansible, it can be used for polarization converter, WSS structure, there is wide commercial prospect in the field WSS, and size can be done greatly, there is no size bottleneck problems present in crystal, pass through plated film and assembly, BEAM SQUINT and IL also can control to obtain very little, are all significantly better than traditional crystal in performance and cost and add wave plate scheme.
Description
Technical field
The utility model relates to optical device fields, and optical device, the optical rotation of polarization are realized especially in WSS
Change device, WSS structure.
Background technique
Wavelength-selective switches (Wavelength Selection Switch, WSS) are the cores of ROADM technology of new generation
Device, implementation have MEMS and two kinds of PLC, and wherein the former relies on its filter with low insertion loss, and the excellent properties of high bandwidth occupy mainstream
Business market, brief configuration as shown in Figure 1, polarization converter as a wherein indispensable element, traditional side
Case is the form of the composition of birefringece crystal 9 plus wave plate 10, and principle is as shown in Fig. 2, light passes through birefringece crystal (usually calcite
Or YVO4) it is divided into O light and E light, it the orthogonal thereto polarization state of the two and is gone away with special angle, the E light after escaping is using one
Polarization state, is switched to, final light combination consistent with O light by 1/2 wave plate, and realization converts random polarization to single linearly polarized light
Function, this scheme is divided by deviation angle, and in the lesser situation of deviation angle, crystal enough " length ", while will consider multi-pass
Road application, then crystal will enough " width ", and comprehensively considering crystal will grow more greatly more evenly, and this adds increased the works of crystal
Skill difficulty and cost；It is set to there is technical limitation constraint in further expand in application and exploitation.
Summary of the invention
The case where for the prior art, the purpose of this utility model is to provide a kind of structures simply, implements reliable and body
The small, easy processing of product, low cost and expand application easily realized in WSS the optical device of polarization, polarization converter,
WSS structure.
In order to realize above-mentioned technical purpose, the technical solution adopted in the utility model are as follows:
A kind of optical device for realizing polarization in WSS comprising transparent glass, half-wave plate and polarization spectro rib
Mirror is equipped with the polarization beam splitter that its exit facet is divided into top and the bottom, the transparent glass in the polarization splitting prism
Set on the top of polarization splitting prism exit facet, the half-wave plate is set to the lower part of polarization splitting prism exit facet, described inclined
The lower end surface of vibration Amici prism is equipped with reflectance coating；
When signal light is incident upon on polarization beam splitter by the plane of incidence level of polarization splitting prism, it is divided into polarization state not
Same P light and S light, wherein P light is projected through polarization beam splitter and from exit facet top through transparent glass level；S light quilt
Polarization beam splitter reflects and is injected into polarization splitting prism lower end surface, then by the reflectance coating of its lower end surface secondary reflection again, and penetrates
Entering onto the half-wave plate of exit facet lower part, the S polarization state after half-wave plate changes, it is converted into P light and horizontal output,
It realizes and converts single linearly polarized light for signal light.
Further, the half-wave plate and transparent glass are that gluing is fixed on formation one on polarization splitting prism.
Further, the reflectance coating is polarization beam splitter or high-reflecting film, and the upper surface of the polarization splitting prism is equipped with
Polarization beam splitter or high-reflecting film.
A kind of polarization converter for realizing polarization in WSS comprising by several optical devices described above
The polarization splitting prism group of formation stacked on top of each other, the part that the exit facet of optical device is equipped with half-wave plate are respectively positioned on the same side, if
There is the part of transparent glass to be also respectively positioned on the same side, the polarization converter further includes that collimating optical fibre array and laser beam compression are saturating
Mirror, the polarization splitting prism are mounted between collimating optical fibre array and laser beam compression lens, and collimating optical fibre array exports
Optical signal respectively correspond polarization splitting prism group a wherein optical device the plane of incidence；
When collimated ray array is by the plane of incidence of the corresponding optical device for being transmitted to polarization splitting prism group of several optical signals
When, optical signal is converted into single linearly polarized light and horizontal output, is then incident upon laser beam compression lens again, saturating by laser beam compression
The two beam horizontal signal light that mirror exports same optical device are converted to the two-beam with certain angle and form common focus point.
Further, the polarization splitting prism group is 2NA optical device formation stacked on top of each other, wherein N is greater than 1
Integer.
Further, the collimating optical fibre array by several optical fiber and with optical fiber correspond and face setting it is several
A self-focusing lens composition.
Further, the collimating optical fibre array is by several optical fiber and several optical fiber to connect one to one with optical fiber
Collimator composition.
A kind of WSS structure based on MEMS micromirror array comprising polarization converter described above further includes analysis
Lens, diffraction grating and MEMS micromirror array, the polarization converter, analysis lens, diffraction grating are set in sequence, described
MEMS micromirror array is set to analysis lens close to the end face side of polarization converter；
After optical signal input polarization converter, optical signal is converted to the signal light of single linear polarization simultaneously by polarization converter
After injecting analysis lens, collimated light beam is formed, is then incident upon on diffraction grating, wherein the signal light of different wave length is diffracted
Optical grating diffraction is at different angle and is reflected back on analysis lens, then after analysis lens project, is incident to MEMS micromirror array
On different lens units, the lens unit on MEMS micromirror array forms the signal light phase with the different wave length for being incident to its surface
The signal light of different wave length is reflected back toward analysis lens and sequentially via diffraction grating, analysis lens by the deflection angle of adaptation
Afterwards, it is emitted back towards polarization converter, and the optical signal being emitted back towards is converted back into former polarization state by polarization converter and is coupled into corresponding defeated
Exit port.
A kind of a kind of wavelength-selective switches comprising WSS structure based on MEMS micromirror array described above.
A kind of a kind of optical system comprising wavelength-selective switches described above.
Using above-mentioned technical solution, the utility model compared to existing technologies, is had the beneficial effect that logical
Cross the combination to half-wave plate and polarization splitting prism, form a kind of novel optical device, the device may be implemented by with
Machine polarised light is converted into the function of single polarised light, compared with the crystal in traditional wavelength-selective switches adds the structure of wave plate, tool
There is low cost, easy processing, expansible, there is wide commercial prospect in the field WSS, in addition, using polarization spectro rib
The optical device that mirror adds the form of half-wave plate to form also has structure simple and size can be done greatly, and there is no present in crystal
Size bottleneck problem, by plated film and assembly, BEAM SQUINT and IL also can control to obtain very little, all be significantly better than in performance and cost
Traditional crystal adds wave plate scheme, and can be stacked and be applied as the polarization converter of multichannel, and can should
Polarization converter is in wavelength-selective switches (WSS).
Detailed description of the invention
The utility model is further elaborated with reference to the accompanying drawings and detailed description:
Fig. 1 is the WSS structure simplified diagram based on MEMS micromirror array；
Fig. 2 is the polarization spectro optical device brief configuration schematic diagram for adding wave plate using crystal in the prior art；
Fig. 3 is the schematic diagram of one of brief implementation structure of optical device of the utility model；
Fig. 4 is the wherein visual angle cut-away illustration that several optical devices of the utility model are laid out；
Fig. 5 is another viewing angle constructions schematic diagram that several optical devices of the utility model are laid out；
Fig. 6 is to be applied to the utility model to realize that the implementation of the polarization converter of polarization is illustrated in WSS
Figure.
Specific embodiment
Shown in 3, the utility model realizes the optical device of polarization in WSS comprising transparent glass 4, half
Wave plate 3 and polarization splitting prism 1 are equipped with the polarization point that its exit facet is divided into top and the bottom in the polarization splitting prism 1
Light film 2, the transparent glass 4 are set to the top of 1 exit facet of polarization splitting prism, and the half-wave plate 3 is set to polarization spectro
The lower end surface of the lower part of 1 exit facet of prism, the polarization splitting prism 1 is equipped with reflectance coating；
When signal light is incident upon on polarization beam splitter 2 by the plane of incidence level of polarization splitting prism 1, it is divided into polarization state
Different P light and S light, wherein P light is projected through polarization beam splitter 2 and from exit facet top through transparent glass level；S light
It is reflected by polarization beam splitter 2 and is injected into 1 lower end surface of polarization splitting prism, then by the reflectance coating of its lower end surface secondary reflection again,
And be injected on the half-wave plate 3 of exit facet lower part, the S polarization state after half-wave plate 3 changes, and is converted into P light and water
Flat output, realizes and converts single linearly polarized light for signal light.
A kind of wherein fixed form as half-wave plate 3 and transparent glass 4, further, the half-wave plate 3 and light transmission glass
Glass 4 is that gluing is fixed on formation one on polarization splitting prism 1.
Further, the reflectance coating is polarization beam splitter or high-reflecting film, and the upper surface of the polarization splitting prism is equipped with
Polarization beam splitter or high-reflecting film can be laid out combination when reflectance coating uses polarization beam splitter in order to multiple optical devices
At an array structure, in conjunction with as shown in fig. 4 or 5.
The brief processing method of structure shown in Fig. 3 is as follows:
1. designing & processes PBS
The effect of PBS is that random polarization is divided into S light and P light, and wherein S light reflects, and P light transmission is realized by plated film；
This patent defines Rs > 99.8%, 1525~1568nm of the@of Tp > 98%.
2. designing & processes half-wave plate
The effect of half-wave plate is to convert P light for S light；This patent uses quartz crystal, and degree of delay is controlled 1/
2Lambda+/- 1/500Lambda@1545nm, when processing, pay attention to controlling the depth of parallelism and through wavefront.
3. designing & processes common glass sheet
Common glass sheet is opposite with half-wave plate, does not change polarization state；This patent is excellent using H-K9L with good uniformity
Equal product, when processing, pay attention to controlling the depth of parallelism and through wavefront.
4. glued
Gluing step is to be bonded the glue of above-mentioned three kinds of elements index matching, is the glue of PBS array first
It closes and (is bonded the PBS of different units according to number of channels), be then bonded common glass sheet and half-wave plate again.
5. plated film
Plated film is completed in exit facet and the plane of incidence, it is therefore an objective to be reduced IL, be paid attention to the state plated film of strip to save
Cost.
6. cutting
Cutting is last procedure, and the strip after above-mentioned glued plated film is cut, finished product is eventually become；Cutting note
Meaning chipping and side, which are hung down, to be controlled, to guarantee bigger CA.
It is shown in Figure 6, it is applied to realize the polarization of polarization in WSS it illustrates the utility model optical device
Converter comprising by the polarization splitting prism group 7 of several formation stacked on top of each other of optical device 71 described above, optics device
The part that the exit facet of part 71 is equipped with half-wave plate is respectively positioned on the same side, and the part equipped with transparent glass is also respectively positioned on the same side, institute
The polarization converter stated further includes collimating optical fibre array and laser beam compression lens 3, and the collimating optical fibre array is by several light
Fibre 1 and with optical fiber 1 correspond and face setting several self-focusing lens 2 form；But the implementation shape of collimating optical fibre array
Formula is not limited to this one kind, can also be by several optical fiber and several optical fiber collimator groups to connect one to one with optical fiber
At；The polarization splitting prism 7 is mounted between collimating optical fibre array and laser beam compression lens 3, and collimating optical fibre array is defeated
Optical signal out respectively corresponds the plane of incidence of a wherein optical device 71 for polarization splitting prism group 7；
When collimated ray array is by the incidence of the corresponding optical device 71 for being transmitted to polarization splitting prism group 7 of several optical signals
When face, optical signal is converted into single linearly polarized light and horizontal output, laser beam compression lens is then incident upon again, by laser beam compression
The two beam horizontal signal light that lens export same optical device are converted to the two-beam with certain angle and form copolymerization coke
Point.
Wherein, 71 quantity of optical device in polarization splitting prism group 7 can be configured as needed, the polarization point
Light prism group 7 can be 2NThe formation stacked on top of each other of a optical device 71, wherein N is the integer greater than 1.
On the basis of Fig. 6, in conjunction with Fig. 1, the implementation structure of Fig. 6 is replaced into the component in Fig. 1 marked as 1,2, is formed new
WSS structure based on MEMS micromirror array comprising polarization converter described above further includes analysis lens 4, diffraction light
Grid 5 and MEMS micromirror array 6, the polarization converter, analysis lens 4, diffraction grating 5 are set in sequence, and the MEMS is micro-
Lens array 6 is set to analysis lens 4 close to the end face side of polarization converter；
After optical signal input polarization converter, optical signal is converted to the signal light of single linear polarization simultaneously by polarization converter
After injecting analysis lens 4, collimated light beam is formed, is then incident upon on diffraction grating 5, wherein the signal light of different wave length is spread out
It penetrates grating 5 to be diffracted into different angle and be reflected back on analysis lens 4, then after analysis lens 4 project, is incident to MEMS micromirror battle array
On the different lens units of column 6, the lens unit on MEMS micromirror array 6 forms the letter with the different wave length for being incident to its surface
The adaptable deflection angle of number light, by the signal light of different wave length be reflected back toward analysis lens and sequentially via diffraction grating 5, divide
After analysing lens 4, it is emitted back towards polarization converter, and the optical signal being emitted back towards is converted back into former polarization state by polarization converter and is coupled into pair
The output port answered.
The optical device of the utility model be formed by polarization converter do not limit to expansion described above,
It can be with further expansion in wavelength-selective switches or optical system.
The above is only the preferred embodiment of the utility model, and the protection scope of the utility model is not limited merely to
Above-described embodiment, technical solution belonging to the idea of the present invention belong to the protection scope of the utility model.It should refer to
Out, for those skilled in the art, it is without departing from the principle of the utility model it is several improvement and
Retouching, these improvements and modifications also should be regarded as the protection scope of the utility model.
Claims (8)
1. it is a kind of in WSS realize polarization optical device, it is characterised in that: it include transparent glass, half-wave plate and partially
Shake Amici prism, and the polarization beam splitter that its exit facet is divided into top and the bottom is equipped in the polarization splitting prism, described
Transparent glass is set to the top of polarization splitting prism exit facet, and the half-wave plate is set under polarization splitting prism exit facet
The lower end surface in portion, the polarization splitting prism is equipped with reflectance coating；
When signal light is incident upon on polarization beam splitter by the plane of incidence level of polarization splitting prism, it is different to be divided into polarization state
P light and S light, wherein P light is projected through polarization beam splitter and from exit facet top through transparent glass level；S light is by polarization point
Light film reflects and is injected into polarization splitting prism lower end surface, then by the reflectance coating of its lower end surface secondary reflection again, and is injected into out
It penetrates on the half-wave plate of face lower part, the S polarization state after half-wave plate changes, and is converted into P light and horizontal output, and realizing will
Signal light is converted into single linearly polarized light.
2. a kind of optical device for realizing polarization in WSS according to claim 1, it is characterised in that: described
Half-wave plate and transparent glass are that gluing is fixed on formation one on polarization splitting prism.
3. a kind of optical device for realizing polarization in WSS according to claim 1, it is characterised in that: described
Reflectance coating is polarization beam splitter or high-reflecting film, and the upper surface of the polarization splitting prism is equipped with polarization beam splitter or high-reflecting film.
4. a kind of polarization converter for realizing polarization in WSS, it is characterised in that: it includes by several claims 1
To the polarization splitting prism group of the formation stacked on top of each other of optical device described in one of 3, the exit facet of optical device is equipped with half-wave plate
Part be respectively positioned on the same side, the part equipped with transparent glass is also respectively positioned on the same side, and the polarization converter further includes standard
Direct light fibre array and laser beam compression lens, the polarization splitting prism be mounted on collimating optical fibre array and laser beam compression lens it
Between, and the optical signal of collimating optical fibre array output respectively corresponds the plane of incidence of a wherein optical device for polarization splitting prism group；
When the plane of incidence of the collimated ray array by the corresponding optical device for being transmitted to polarization splitting prism group of several optical signals, light
Signal is converted into single linearly polarized light and horizontal output, is then incident upon laser beam compression lens again, will by laser beam compression lens
Two beam horizontal signal light of same optical device output are converted to the two-beam with certain angle and form common focus point.
5. a kind of polarization converter for realizing polarization in WSS according to claim 4, it is characterised in that: described
Polarization splitting prism group be 2NA optical device formation stacked on top of each other, wherein N is the integer greater than 1.
6. a kind of polarization converter for realizing polarization in WSS according to claim 4, it is characterised in that: described
Collimating optical fibre array by several optical fiber and with optical fiber correspond and face setting several self-focusing lens form.
7. a kind of polarization converter for realizing polarization in WSS according to claim 4, it is characterised in that: described
Collimating optical fibre array be made of several optical fiber and several optical fiber collimators to connect one to one with optical fiber.
8. a kind of WSS structure based on MEMS micromirror array, it is characterised in that: it includes inclined described in one of claim 4 to 7
Shake converter, further includes analysis lens, diffraction grating and MEMS micromirror array, and the polarization converter, spreads out at analysis lens
It penetrates grating to be set in sequence, the MEMS micromirror array is set to analysis lens close to the end face side of polarization converter；
After optical signal input polarization converter, optical signal is converted to signal light and the injection of single linear polarization by polarization converter
After analyzing lens, collimated light beam is formed, is then incident upon on diffraction grating, wherein the signal light of different wave length is diffracted grating
It is diffracted into different angle and is reflected back on analysis lens, then after analysis lens project, be incident to the difference of MEMS micromirror array
On lens unit, the lens unit on MEMS micromirror array is formed to be adapted with the signal light for the different wave length for being incident to its surface
Deflection angle, by the signal light of different wave length be reflected back toward analysis lens and sequentially via diffraction grating, analyze lens after, penetrate
Polarization converter is returned, and the optical signal being emitted back towards is converted back into former polarization state by polarization converter and is coupled into corresponding output end
Mouthful.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821997769.5U CN209148986U (en) | 2018-11-30 | 2018-11-30 | Optical device, the polarization converter, WSS structure of polarization are realized in WSS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821997769.5U CN209148986U (en) | 2018-11-30 | 2018-11-30 | Optical device, the polarization converter, WSS structure of polarization are realized in WSS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209148986U true CN209148986U (en) | 2019-07-23 |
Family
ID=67288472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821997769.5U Active CN209148986U (en) | 2018-11-30 | 2018-11-30 | Optical device, the polarization converter, WSS structure of polarization are realized in WSS |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209148986U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021135960A1 (en) * | 2019-12-31 | 2021-07-08 | 深圳光峰科技股份有限公司 | Polarization splitting device, polarization splitting structure and projection device |
| WO2021135963A1 (en) * | 2019-12-31 | 2021-07-08 | 深圳光峰科技股份有限公司 | Polarization converter, and light source system thereof |
-
2018
- 2018-11-30 CN CN201821997769.5U patent/CN209148986U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021135960A1 (en) * | 2019-12-31 | 2021-07-08 | 深圳光峰科技股份有限公司 | Polarization splitting device, polarization splitting structure and projection device |
| WO2021135963A1 (en) * | 2019-12-31 | 2021-07-08 | 深圳光峰科技股份有限公司 | Polarization converter, and light source system thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8811823B2 (en) | Dynamic optical devices | |
| CN101681033B (en) | Tunable filter, light source device and spectrum distribution measuring device | |
| CN106019580B (en) | A kind of flexible wide type optical filter with ultra-wide tuning range | |
| CN102859433B (en) | Photoswitch | |
| CN105717589A (en) | Single-light-port multi-path parallel light emission assembly | |
| JPH0322961B2 (en) | ||
| CN209148986U (en) | Optical device, the polarization converter, WSS structure of polarization are realized in WSS | |
| US7307787B2 (en) | Beam splitting prism, method of manufacturing beam splitting prism, and all-optical switching device | |
| CN203133391U (en) | Raster type adjustable filter | |
| CN201096983Y (en) | Grating light tuning filter | |
| JP5855323B1 (en) | Optical collimator array and optical switch device | |
| CN111130637B (en) | Measurement method and measurement system of photon spin-orbital angular momentum combined mode | |
| CN102590952A (en) | Multi-channel dynamic optical dispersion compensator | |
| CN109343222A (en) | Augmented reality Optical devices | |
| CN101943772A (en) | Tunable optical comb filter combining G-T resonant cavity and birefringence element | |
| CN104460009B (en) | A kind of wave multiplexer | |
| CN201886169U (en) | Multiplexing/demultiplexing double-function wavelength multiplexing device | |
| CN101718938B (en) | Dispersion control module and wavelength separator | |
| CN101533129B (en) | High-speed adjustable optical comb filter | |
| CN104020526A (en) | Fiber mode multiplexing and demultiplexing device supporting polarization multiplexing | |
| CN105785515A (en) | Flat-top optical filter having adjustable bandwidth | |
| CN208833952U (en) | Optical fiber delay line multiplexing optical path structure | |
| CN101369015A (en) | Light splitting apparatus of wind detection laser radar based on dual-edge detection | |
| CN109001881A (en) | A kind of liquid crystal chip and wavelength-selective switches | |
| CN202512267U (en) | Depolarization tunable optical wave filter based on TFF (tangential flow filtration) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |