CN203849444U - Full-band wide-angle CWDM film optical filter - Google Patents
Full-band wide-angle CWDM film optical filter Download PDFInfo
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- CN203849444U CN203849444U CN201420278046.5U CN201420278046U CN203849444U CN 203849444 U CN203849444 U CN 203849444U CN 201420278046 U CN201420278046 U CN 201420278046U CN 203849444 U CN203849444 U CN 203849444U
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Abstract
The utility model discloses a full-band wide-angle CWDM film optical filter composed of a glass substrate, a high-reflective film, and an antireflection film. The high-reflective film is disposed on the surface of a side of the glass substrate. The antireflection film is plated on the surface of the other side of the glass substrate in an evaporated manner. The high-reflective film is a 238-layer structure formed by alternately stacking 119 tantalum pentoxide reflection dielectric layers and 119 silicon dioxide reflection dielectric layers. Odd layers between the 1th layer and the 237th layer are tantalum pentoxide reflection dielectric layers. Even layers between the 2nd layer and the 238th layer are silicon dioxide reflection dielectric layers. By means of the material, the thickness, the stacking manner, and the number of film layers, the full-band wide-angle CWDM film optical filter introduces wide-angle full-band technology so as to achieve high wavelength flexibility when a user assembles devices such that a product may achieve better optical effects and is improved in stability. After the antireflection film is plated on the glass substrate in an evaporated manner, the PEAK LOSS of the product may reach more than -0.1dB.
Description
Technical field
The utility model relates to a kind of optical filter, particularly a kind of all band wide-angle CWDM Thin Film Filter.
Background technology
Along with the arrival of information age, people increase severely day by day to the demand of optical communication bandwidth, and the method that increases light path bandwidth has two kinds: the one, and the single channel transfer rate of raising optical fiber; Two is exactly to increase the number of wavelengths of transmitting in single fiber, adopts wavelength-division multiplex technique (WDM).To be widely used in from now on, in China's Metropolitan Area Network (MAN) (MAN), access network construction, there is long-range development prospect.All-wave wide-angle CWDM product, it is the spin-off from all-wave CWDM product, at present broadband metropolitan area network (BMAN) is just becoming the focus of informatization, DWDM(dense wave division multipurpose) enormous bandwidth and the transparency of transmission data, be undoubtedly the one preferred technique in current fiber optic applications field.Yet MAN etc. have that transmission range is short, topology flexibly and the feature such as access style is many, as indiscriminately imitate the DWDM for long-distance transmission, inevitable high cost; Simultaneously early stage DWDM is also difficult to adapt to the property versatile and flexible of MAN etc.In the face of the broadband demand of this low-cost metropolitan area scope, CWDM(Coarse Wavelength Division Multiplexing) technology is arisen at the historic moment.As all-wave wide-angle CWDM product, be on the basis of CWDM technology, through developing layer by layer, design innovation, is becoming the proud person in optical communication device now.
The shortcoming of the CWDM Thin Film Filter of
prior art: mainly due to being subject to the residual impact of optical fiber water cut, can increase loss, especially in the Optical Fiber Transmission of long distance, more obvious; The reuse wavelengths number that CWDM supports on simple optical fiber is also less, mainly that current commercial CWDM system also concentrates on 1500nm window, therefore must accelerate the research and development progress of all-wave wide-angle product, to catch up with the paces of application, otherwise wavelength number deficiency will cause CWDM after day dilatation cost higher.The optical effect of CWDM Thin Film Filter and stability need further to strengthen.
Summary of the invention
The purpose of this utility model is to overcome deficiency of the prior art, and all band wide-angle CWDM that a kind of optical effect is good and properties of product are stable Thin Film Filter is provided.
For achieving the above object, the technical scheme that the utility model adopts is:
All band wide-angle CWDM Thin Film Filter, it is to consist of glass substrate, high-reflecting film and anti-reflection film, high-reflecting film is located at a side surface of glass substrate, anti-reflection film evaporation is on the opposite side surface of glass substrate, described high-reflecting film is by 119 tantalum pentoxide reflecting medium layer and 119 238 layers of structures that silicon dioxide reflecting medium layer is alternately formed by stacking, the odd-level of the 1st layer to the 237th layer is tantalum pentoxide reflecting medium layer, and the even level of the 2nd layer to the 238th layer is silicon dioxide reflecting medium layer.
In described even level, wherein, the thickness of the 12nd layer is 1074.86um, and the thickness of the 238th layer is 377.42um, and the thickness of all the other even levels is 268.72um; In described odd-level, the thickness of the 237th layer is 47.92um, and the thickness of all the other odd-levels is 183.26um.
Described anti-reflection film is to consist of 1 tantalum pentoxide reflecting medium layer and 1 silicon dioxide reflecting medium layer, and the 1st layer is silicon dioxide reflecting medium layer, is close to the surface of glass substrate, and the 2nd layer is tantalum pentoxide reflecting medium layer, is close to the surface of the 1st layer.
The thickness of described anti-reflection film is 403.2um.
In described anti-reflection film, the thickness of ground floor is 55.4um, and the thickness of the second layer is 347.8um.
The beneficial effects of the utility model: owing to adopting above-mentioned version, material, the thickness of the utility model by rete and stack mode and the number of plies, introduce wide-angle all-wave technology, make client's length flexible when carrying out device assembling high, increase work efficiency, optics cold working thickness 0.8mm, can make product reach better optical effect, increases product stability; On glass substrate, after evaporation anti-reflection film, product P EAK LOSS, can reach-0.1dB, above, fully meets customer requirement.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
Fig. 1 is structural representation of the present utility model.
In figure: 1, glass substrate; 2, high-reflecting film; 3, anti-reflection film.
Embodiment
As shown in Figure 1, all band wide-angle CWDM Thin Film Filter, it is to consist of glass substrate 1, high-reflecting film 2 and anti-reflection film 3, high-reflecting film 2 is located at a side surface of glass substrate 1, anti-reflection film 3 evaporations are on the opposite side surface of glass substrate 1, described high-reflecting film 2 is by 119 tantalum pentoxide reflecting medium layer and 119 238 layers of structures that silicon dioxide reflecting medium layer is alternately formed by stacking, the odd-level of the 1st layer to the 237th layer is tantalum pentoxide reflecting medium layer, and the even level of the 2nd layer to the 238th layer is silicon dioxide reflecting medium layer.In described even level, wherein, the thickness of the 12nd layer is 1074.86um, and the thickness of the 238th layer is 377.42um, and the thickness of all the other even levels is 268.72um; In described odd-level, the thickness of the 237th layer is 47.92um, and the thickness of all the other odd-levels is 183.26um.
Described anti-reflection film is to consist of 1 tantalum pentoxide reflecting medium layer and 1 silicon dioxide reflecting medium layer, and the 1st layer is silicon dioxide reflecting medium layer, is close to the surface of glass substrate, and the 2nd layer is tantalum pentoxide reflecting medium layer, is close to the surface of the 1st layer.The thickness of described anti-reflection film is 403.2um.In described anti-reflection film, the thickness of ground floor is 55.4um, and the thickness of the second layer is 347.8um.
Feature of the present utility model: the feature of all band wide-angle CWDM Thin Film Filter is that cost is low, has the features such as the low and volume of power attenuation is little in addition.Simultaneously when carrying out optics assembling, the calibration of carrying out light path that can maneuverability.In addition each wave band of the research and development of all-wave wide-angle product is respectively, S+C+L Band:1470,1490,1510,1530,1550,1570,1590,1610(unit: nm).Existing all-wave CWDM product has been containing having covered the wave band from 1470-1610, because CWDM light wave channel pitch is wider, and few than DWDM of optical band multiplexed optical number of wavelengths on same fibre; CWDM modulated laser adopts uncooled laser, with electronic tuning, very large to the energy attenuation of light; And all-wave wide-angle product has but been avoided this difficult point, thereby significantly reduced cost, all-wave friend angle CWDM system cost generally only has 60% of common CWDM at present.CWDM provides wider transmission bandwidth and the service accessibility of all-transparent with very low cost, be applicable to point-to-point, Ethernet, the various popular network structures such as SDH ring, be particularly suitable for short-distance and medium-distance, high bandwidth, access more than signal type and unpredictable communication applications, as the network service of between building or metropolitan area, and all-wave wide-angle CWDM product, it can be a kind of optical communication mode of point-to-multipoint, by combining with CWDM, each independent wavelength channel can be used as the virtual optical link of PON, realize the broadband data transmission of Centroid and a plurality of distribution nodes.
The above is preferred implementation of the present utility model; certainly can not limit with this interest field of the utility model; should be understood that; for those skilled in the art; the technical solution of the utility model is modified or is equal to replacement, do not depart from the protection domain of technical solutions of the utility model.
Claims (5)
1. an all band wide-angle CWDM Thin Film Filter, it is characterized in that: it is to consist of glass substrate, high-reflecting film and anti-reflection film, high-reflecting film is located at a side surface of glass substrate, anti-reflection film evaporation is on the opposite side surface of glass substrate, described high-reflecting film is by 119 tantalum pentoxide reflecting medium layer and 119 238 layers of structures that silicon dioxide reflecting medium layer is alternately formed by stacking, the odd-level of the 1st layer to the 237th layer is tantalum pentoxide reflecting medium layer, and the even level of the 2nd layer to the 238th layer is silicon dioxide reflecting medium layer.
2. all band wide-angle CWDM Thin Film Filter according to claim 1, is characterized in that: in described even level, wherein, the thickness of the 12nd layer is 1074.86um, and the thickness of the 238th layer is 377.42um, and the thickness of all the other even levels is 268.72um; In described odd-level, the thickness of the 237th layer is 47.92um, and the thickness of all the other odd-levels is 183.26um.
3. all band wide-angle CWDM Thin Film Filter according to claim 1 and 2, it is characterized in that: described anti-reflection film is to consist of 1 tantalum pentoxide reflecting medium layer and 1 silicon dioxide reflecting medium layer, the 1st layer is silicon dioxide reflecting medium layer, be close to the surface of glass substrate, the 2nd layer is tantalum pentoxide reflecting medium layer, is close to the surface of the 1st layer.
4. all band wide-angle CWDM Thin Film Filter according to claim 3, is characterized in that: the thickness of described anti-reflection film is 403.2um.
5. all band wide-angle CWDM Thin Film Filter according to claim 4, is characterized in that: in described anti-reflection film, the thickness of ground floor is 55.4um, and the thickness of the second layer is 347.8um.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420278046.5U CN203849444U (en) | 2014-05-28 | 2014-05-28 | Full-band wide-angle CWDM film optical filter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420278046.5U CN203849444U (en) | 2014-05-28 | 2014-05-28 | Full-band wide-angle CWDM film optical filter |
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| CN203849444U true CN203849444U (en) | 2014-09-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110129737A (en) * | 2019-06-04 | 2019-08-16 | 天通（嘉兴）新材料有限公司 | A kind of production method of CWDM optical filter |
| CN114994820A (en) * | 2022-06-16 | 2022-09-02 | 安徽信息工程学院 | Optical filter and application thereof |
-
2014
- 2014-05-28 CN CN201420278046.5U patent/CN203849444U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110129737A (en) * | 2019-06-04 | 2019-08-16 | 天通（嘉兴）新材料有限公司 | A kind of production method of CWDM optical filter |
| CN114994820A (en) * | 2022-06-16 | 2022-09-02 | 安徽信息工程学院 | Optical filter and application thereof |
| CN114994820B (en) * | 2022-06-16 | 2024-02-09 | 安徽信息工程学院 | Optical filter and application thereof |
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