CN107300732A - A kind of narrow band pass filter of multi-cavity membrane system for optic communication - Google Patents
A kind of narrow band pass filter of multi-cavity membrane system for optic communication Download PDFInfo
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- CN107300732A CN107300732A CN201610125130.7A CN201610125130A CN107300732A CN 107300732 A CN107300732 A CN 107300732A CN 201610125130 A CN201610125130 A CN 201610125130A CN 107300732 A CN107300732 A CN 107300732A
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- Prior art keywords
- band pass
- pass filter
- narrow band
- chamber
- index material
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/207—Filters comprising semiconducting materials
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Filters (AREA)
Abstract
The present invention relates to a kind of narrow band pass filter of the multi-cavity membrane system for optic communication.The multi-cavity membrane system of n identical single-chamber superposition is plated in optical glass surface, each single-chamber is made up of 11 layers of film layer by high-index material and low-index material alternate combinations, and one layer of the centre of single-chamber is separation layer.In the present invention, the passband width of number n=5-9. present invention of the single-chamber of superposition is narrow, and passband transmitance is high, and product yield is high.
Description
Technical field
The invention belongs to optic communication device category.
Background technology
IT industry with important support based on optical communication is emerging strategic industries, to national economy and society
It can develop and play an important role.Wherein, Information network project of future generation, that is, comprehensively utilize all kinds of broadband technologys, constructs more complete
Kind multi-level, three-dimensional, the information network of all standing, are the important contents for building " intelligent society ".Therefore, implementing " light
Fibre arrives family " engineering, the fiber broadband access of various modes is greatly developed, accelerates optical-fiber network intellectualized reconstruction, is trend of the times.
OWDM communicates（WDM）It is the new and high technology in the fiber optic communication that a kind of new development is got up, because it has
The characteristics of and advantage, thus quickly grow, especially by the effort of the eighties in last century, the manufacture of device and in communication
Using being reached at a relatively high level.Multilayered interference film optical filter, i.e. Filter Type device, in being passive WDM devices
A kind of primary structure.The application of WDM technology in the communications just has many experiment reports since the beginning of the eighties in last century, extremely
Modern application level is improved constantly, and from the application of the various fiber optic networks of initial point-be multiplexed into, mainly includes main line and relaying
Net, user access networks and broadband network exchange several aspects.
From now on, the application of WDM technology in the communications has good prospect, mainly by the following aspects：（1）Main line is with
After the application of net.Wavelength division multiplex fiber optic communication can fully discover and use optical fiber in long distance line transmission and potentially transmit appearance
Amount, multipling channel number is not necessarily too many（Less than 10）, WDM fiber, which communicates, to have one as optical fiber telecommunications system of new generation
Important symbol.（2）Application in user access network.One of most important application fields of WDM are exactly Optical Fiber Subscriber Access Network.
（3）Application in broadband network exchange system.High speed optical switched technology will be future communications net in an importance, wherein
One of be wavelength-division light exchange, clog-free exchange network and optical packet switching system can be developed using it.Therefore WDM
The application of technology in the communications is particularly significant and promising.
In WDM technology, it is allowed to the light of particular range of wavelengths by and by other wavelength light cut-off optical filter in light
Irreplaceable effect is played in communication device.The demand for development optical filter of optical communication technology develops to higher precision direction,
Ask the range of wavelengths for passing through/ending more and more narrow, the wave-length coverage passed through is less and less.
At present, in WDM technology, 1490nm narrow band pass filter application is just increasing.Optical filter requirement：（1）
The light of 1480-1500nm wavelength is passed through, it is desirable to which transmitance T ＞ 93.32% are insertion loss<-0.3dB；（2）1260-1360nm
With the light cut-off in the range of 1545-1660nm, it is desirable to transmitance T<0.01% i.e. isolation ＞ -40dB.The optical filter is because passband
Wave-length coverage is narrow, and passband transmitance is high, cut-off region transmitance is low, and difficulty is high, and product yield is low.
Present invention seek to address that 1490nm narrow band pass filter prior arts because passing band wavelength range it is narrow, passband transmitance
High, cut-off region transmitance is low, the problem of caused difficulty is high, product yield is low.
The content of the invention
The present invention proposes a kind of optical filter of the film layer structure of multi-cavity arrowband superposition, and the ancestor of the present invention can be realized well
Purport.
Concrete scheme is：Film layer is expressed as HLHLH 2L HLHLH by constituting（Wherein：H represents high-index material.L generations
Table low-index material）11 tunics be chamber, then by the film layer needed for chamber superposition composition as n identical.Pass through n
Individual 11 layers（HLHLH 2L HLHLH）Chamber is superimposed to improve transmitance, increase cut-off isolation.
In the present invention, number n=5-9 of the single-chamber of superposition, it is still further preferred that n=7.
High-index material in the present invention is Ti3O5, and its refractive index is 2.3.Tantalum pentoxide can also be used, its refractive index
2.1。
Low-index material in the present invention is SiO2, and its refractive index is 1.46.
Specific film layer combination and thickness see the table below
Table one, film layer combination and thickness
Using the film layer structure of the present invention, bandpass width can be controlled well, improve product yield.
【Brief description of the drawings】
Fig. 1 is the multi-cavity film structure schematic diagram of the 1490nm narrow band pass filters of the present invention,
Fig. 2 is the curve of spectrum of the optical filter of the single-chamber membrane system of 11 tunics,
Fig. 3 is the curve of spectrum of the optical filter of the multi-cavity membrane system of 7 single-chamber superpositions.
In figure
1 --- --- optical filter substrate glass
2 --- --- optical filter film layer outer surfaces
The single-chamber that 3 --- --- 11 tunic is constituted
4 --- --- and 3 identical single-chambers
The multi-cavity of 5 --- --- 7 identical single-chamber superposition
【Embodiment】Embodiments of the present invention are exemplified below.
Embodiment
Glass substrate is first cut into the 50*50mm of suitable plated film small pieces, small pieces are cleaned into drying, in coating machine, pressed
Film layer combination and thickness requirement according to table one, plate corresponding film layer, that is, obtain the 1490nm of present invention narrow-band-filter respectively
Piece.
Claims (5)
1. a kind of narrow band pass filter for optic communication, plural layers are plated in optical glass surface, it is characterized in that：Film layer is by group
Into being expressed as HLHLH 2L HLHLH（Wherein：It is Ti3O5 that H, which represents high-index material, and it is SiO2 that L, which represents low-index material,）
11 tunics be chamber, then by the film layer needed for chamber superposition composition as n identical.
2. narrow band pass filter as claimed in claim 1, it is characterized in that：Described n=5-9, it is still further preferred that n=7.
3. narrow band pass filter as claimed in claim 1, it is characterized in that：Described high-index material is Ti3O5, its refractive index
For 2.3.
4. narrow band pass filter as claimed in claim 1, it is characterized in that：Described high-index material is tantalum pentoxide,
Its refractive index 2.1.
5. narrow band pass filter as claimed in claim 1, it is characterized in that：Described low-index material is SiO2, its refractive index
For 1.46.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610125130.7A CN107300732A (en) | 2016-04-15 | 2016-04-15 | A kind of narrow band pass filter of multi-cavity membrane system for optic communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610125130.7A CN107300732A (en) | 2016-04-15 | 2016-04-15 | A kind of narrow band pass filter of multi-cavity membrane system for optic communication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107300732A true CN107300732A (en) | 2017-10-27 |
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ID=60136637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610125130.7A Pending CN107300732A (en) | 2016-04-15 | 2016-04-15 | A kind of narrow band pass filter of multi-cavity membrane system for optic communication |
Country Status (1)
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| CN (1) | CN107300732A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112068234A (en) * | 2020-09-10 | 2020-12-11 | 天津津航技术物理研究所 | Intelligent protection narrowband optical filter |
-
2016
- 2016-04-15 CN CN201610125130.7A patent/CN107300732A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112068234A (en) * | 2020-09-10 | 2020-12-11 | 天津津航技术物理研究所 | Intelligent protection narrowband optical filter |
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Legal Events
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171027 |