CN201464752U - Tunable filter based on transparent photoelectric ceramic - Google Patents
Tunable filter based on transparent photoelectric ceramic Download PDFInfo
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- CN201464752U CN201464752U CN2009200873888U CN200920087388U CN201464752U CN 201464752 U CN201464752 U CN 201464752U CN 2009200873888 U CN2009200873888 U CN 2009200873888U CN 200920087388 U CN200920087388 U CN 200920087388U CN 201464752 U CN201464752 U CN 201464752U
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Abstract
The utility model discloses a tunable Fabry-Perot cavity filter based on transparent photoelectric ceramic, consisting of a collimator (consisting of a self-focusing lens and tail fiber) with the end surface of being plated with an anti-reflection film, novel lead magnesio-niobate-lead titanate (PMN-PT) photoelectric transparent ceramic plated with the anti-reflection film, a high reverse film and a transparent electrode, and a cylindrical metal cavity. The novel lead magnesio-niobate-lead titanate (PMN-PT) photoelectric transparent ceramic with the two ends plated with the high reverse films forms a Fabry-Perot cavity; light wave is used for generating birefrigent effect in the cavity when the voltage changes, reflection is accompanied to form multi-light interference effect, and then tunable filtering can be carried out. The filter has low requirement to rear-end equipment, tiny volume, stable performance, is suitable for batch production and can be widely applied to a fibre optic sensor system.
Description
Technical field
The utility model relates to a kind of novel Fabry-Perot-type cavity (Fabry-Perot, hereinafter to be referred as FP) tunable optical filter spare, make the tunable fabry-perot cavity filter with novel PMN-PT (PMN-PT) photoelectricity crystalline ceramics specifically with high electrooptical coefficient.
Technical background
Adjustable light wave-filter is the key components in the wavelength-division multiplex system, and it allows us to select certain wavelengths and frequency in real time by link in certain wavelength coverage, and can control and handle data stream in the optical-fiber network by specific technology.Particularly along with the application of intensive light wave multiplex transmission system in optical communication, as the core of multiplexer and demultiplexer, tunable optic filter has become device indispensable in the optical-fiber network.
At present the main method for preparing the tunable fabry-perot chamber has four kinds, and first kind is that optical fiber by two plated films on end face is inserted into mechanics Fabry-Perot-type cavity in the glass capillary, and it is long to regulate the chamber by piezoelectric ceramics.Because the optical fiber external diameter is 125um, capillary diameter is 200um, accomplish optical fiber inserted and not damage optical fiber plated film end face in the glass capillary and guarantee that the plated film end face aligns very difficult, and the fiber end face coating process is also very complicated, thereby its complex manufacturing technology, the cost height; Second kind is that the product of U.S. MOI company is: optical fiber is passed lock pin (glass capillary or ceramic contact pin), and end face and insertion core end face are positioned at same plane, and at this end face coating.Get two sections coated optical fibres aligning like this and place the cavity of a high concentricity to get final product the forming method Fabry-Perot-type cavity, regulate chamber length by piezoelectric ceramics and belong to mechanical adjustment.This method and first method relatively are easier to processing and fabricating, but fibre core aligns very difficultly in the plated film end face, and this high concentricity cavity preparation cost height has limited its application; The third is that Beijing Institute of Technology proposes a kind of Turnning optical fibre method Fabry-perot filter, fibre-optic waveguide is fixed in the endoporus of a lock pin, and an end face is arranged in the lock pin endoporus, and another end face and insertion core end face are positioned at same plane.Inserted an optical fiber in the lock pin endoporus of fixed fiber waveguide simultaneously, this optical fiber and fibre-optic waveguide are aimed at automatically by the lock pin endoporus, and one in two adjacent faces of optical fiber and fibre-optic waveguide is coated with highly reflecting films.The end face of this lock pin, perhaps another plates highly reflecting films with the end face of fine lock pin, in the formation optical Fiber Method pool-and the filtering of pool sieve, it is long to regulate the chamber by piezoelectric ceramics.The someone proposes by at fiber end face plated film and employing V-type groove light being prepared adjustable fabry-perot filter in addition.
More than three kinds of methods have individual common ground to be: parallel by optical fiber two plated film end faces, through air dielectric or other medium forming method Fabry-Perot-type cavities, it is long to regulate the chamber of Fabry-Perot-type cavity by the flex effect of piezoelectric ceramics again, all there is the mechanical motion of relative position in they, and this mechanical motion has limited the raising of sweep frequency.
The 4th kind of method is that application number is 99812864.3 patent " unpolarized responsive type nematic liquid crystal Fabry-Perot wavelength tuning wave filter ", on the inside surface of two substrates, be formed with transparency electrode respectively, on this transparency electrode, plate the reflection horizon respectively, the single recurrence direction alignment layer of plating on a reflection horizon is so that the single recurrence direction arrangement of liquid crystal, plating the consistent alignment layer of direction on another reflection horizon and being processed into to make liquid crystal be axial array, liquid crystal is arranged between the described two substrates, and this wavelength tuning wave filter comes tuning incident light wavelength according to the size of the voltage that is applied in.This fabry-perot filter has in its whole operating voltage range fully and the transport property of polarization of incident light orientation independent.But complicated process of preparation, the range of adjustment of this wave filter are narrower, and liquid crystal is subjected to such environmental effects as organism, and the life-span is very short.
After transparent ferroelectric ceramics in 1970 comes out, just caused extensive attention. it is found that subsequently this material is in the present age many new technologies such as computing technique, display technique, laser technology, holographic memory, the all fields of little audio technology and optoelectronics all have broad application prospects. and lithium columbate crystal is as a kind of non-linear optical crystal material at present, to be used widely at optical communication field. lithium columbate crystal is fit to make the various control couplings and the transmission apparatus of light, isolate as light, amplify, waveguide, devices such as modulation, but because its growing technology can not get breaking through for a long time, the serviceable life of monocrystal is short, it is better that people are striving to find performance always, and the more cheap new material of price is to replace lithium columbate crystal. and transparent photoelectric stupalith PMN-PT has overcome above-mentioned difficulties largely.
Summary of the invention
Technical problem to be solved in the utility model is; A kind of structure miniization is provided, production technology is simple, cost is low, and stable performance is suitable for the tunable fabry-perot cavity filter of mass production, can be widely used in optical fiber sensing system.
The utility model has the advantages that; Select PMN-PT (PMN-PT) transparent photoelectric pottery for use: it is a polycrystalline material, does not need optical axis alignment, can be processed into different size and dimensions; Composition can be adjusted, the variation range broad; Adopt atmosphere sintering and hot pressing and sintering technique manufacturing, production cost is lower; Electrooptical coefficient can reach more than 3 times of lithium columbate crystal, and is very sensitive to the reaction of electric field; Has good light transmittance at 500nm-7000nm on a large scale; Temperature dependency is little; Have the soundness and the permanance of pottery, and can work under High Temperature High Pressure, therefore long service life selects for use PMN-PT (PMN-PT) transparent photoelectric pottery to make the tunable fabry-perot cavity filter.
The utility model, tunable fabry-perot cavity filter in the transparent photoelectric ceramic-base tunable wave filter, comprise that end face is coated with the collimating apparatus of anti-reflection film (being made up of GRIN Lens and tail optical fiber), be coated with novel PMN-PT (PMN-PT) the photoelectricity crystalline ceramics of anti-reflection film, high-reflecting film, transparent membrane electrode, cylindric metallic cavity.Do not have movable part in this system, can realize high-speed Wavelength demodulation, frequency is greatly improved; And novel PMN-PT (PMN-PT) photoelectricity crystalline ceramics is an inorganic material, temperature dependency is little, can work under High Temperature High Pressure, its electrooptical coefficient can reach more than 3 times of lithium columbate crystal, the free spectrum zone broad of the resulting new mode filter of the present invention, the response frequency height, stable performance, long service life.
Structure of the present utility model is: an end face at collimation lens plates anti-reflection film, and the transmissivity of anti-reflection film is more than 99.9% and form collimating apparatus; Plate the indium tin oxide transparent conducting film respectively as transparency electrode at PMN-PT (PMN-PT) photoelectricity crystalline ceramics two ends; Plate high-reflecting film at the transparency electrode outside surface, the reflectivity of high-reflecting film is about 99.0%; Plate one deck anti-reflection film on high-reflecting film again, the transmissivity of anti-reflection film is more than 99.9%; Cut out a through slot at the cylindrical shell medium line, the size of groove matches with photoelectricity crystalline ceramics size; To grow and be 2mm, wide is 1mm, thickly is inserted in the groove in the middle of the cylindrical shell, with solidifying glue bond for 0.1-0.2mm PMN-PT (PMN-PT) photoelectricity crystalline ceramics; Collimating apparatus and back collimating apparatus before insert respectively at the cylindrical shell two ends are regulated forward and backward collimating apparatus and with solidifying glue it are bonded in the housing chamber to the optimum position.Because the polycrystalline structure of PMN-PT (PMN-PT) transparent photoelectric pottery is a Ca-Ti ore type, belongs to a class relaxation material, the electric field that has isotropic least energy rock-steady structure and twist easily.Under External Electrical Field, all farmlands are all tended to external electric field and are arranged, and promptly polarize, and light will produce birefringence, thereby shows very strong electrooptical effect.The input light wave becomes directional light after by preceding collimating apparatus and enters the PMN-PT photoelectricity crystalline ceramics block that two ends are coated with high-reflecting film, it is Fabry-Perot-type cavity, birefringence effect takes place therein, and be attended by by the many interference of light that reflect to form, projection light is outwards exported by the back collimating apparatus again behind Fabry-Perot-type cavity.Simultaneously, utilize the photoelectric effect of PMN-PT photoelectricity crystalline ceramics, under the extra electric field effect, change its refractive index, reach the tuning purpose of refractive index.Owing to adopt technique scheme, the utility model provides has following beneficial effect:
(1). the physical dimension of whole filter realizes microminiaturized, and volume only is equivalent to a thirtieth of U.S. MOI company, even littler;
(2). utilize the refractive index of the next tuning incident light of photoelectric effect of PMN-PT photoelectricity crystalline ceramics, avoid using piezoelectric ceramics to carry out the mechanical motion of the relative position of the long tuning existence in chamber, eliminated the restriction that this mechanical motion causes the sweep frequency raising;
(3). adopt novel PMN-PT photoelectricity transparent ceramic material, it has a series of excellent properties: polycrystalline material, do not need optical axis alignment, can be processed into different size and dimensions; Form may command, the variable range broad; Ripe atmosphere sintering and hot pressing and sintering technique manufacturing are arranged, and production cost is lower; Electrooptical coefficient can reach more than 3 times of lithium columbate crystal, and is very sensitive to the reaction of electric field; Has good light transmittance at 500nm-7000nm on a large scale; Temperature dependency is little; Have the soundness and the permanance of pottery, and can under High Temperature High Pressure, work long service life.
(4). plate high-reflecting film by the outer face that is connected with transparency electrode at PMN-PT photoelectricity crystalline ceramics block, thereby the forming method Fabry-Perot-type cavity is substituted in the fiber end face plated film and has reduced the manufacture craft difficulty; And of the present invention to light requirement reduction, reduced integrally-built difficulty of processing.
Description of drawings
Fig. 1 is preparation method's structural representation of transparent photoelectric ceramic-base tunable wave filter
Fig. 2 is preceding collimating apparatus and back collimator structure synoptic diagram
Wherein: collimating apparatus before the 1-, transparency electrode before the high-reflecting film before the anti-reflection film before the 2-, 3-, 4-, 5-PMN-PT (PMN-PT) photoelectricity crystalline ceramics, the cylindric metallic cavity of 6-, transparency electrode behind the 7-, high-reflecting film behind the 8-, anti-reflection film behind the 9-, collimating apparatus behind the 10-.The a-collimation lens, the b-anti-reflection film
Specific embodiments
Be further described below in conjunction with 1 pair of technical scheme of the present invention of accompanying drawing.
Concrete structure of the present utility model is: at first, as shown in Figure 2: plating one deck anti-reflection film b transmissivity forms collimating apparatus more than 99.9% on the end face of collimation lens a, (preceding collimating apparatus and back collimating apparatus).
Again as shown in Figure 1: be 2mm long, wide be 1mm, thick for the two ends of 0.1-0.2mm PMN-PT PMN-PT photoelectricity crystalline ceramics 5 plate respectively before transparency electrode 4 with after transparency electrode 7 (by the ITO made); High-reflecting film 3 and back high-reflecting film 8 before preceding transparency electrode 4 and back transparency electrode 7 outside surfaces plate respectively again, reflectivity anti-reflection film 2 and back anti-reflection film 9 transmissivities before plating one deck respectively again more than 99.0% on preceding high-reflecting film 3 and back high-reflecting film 8 guarantee the depth of parallelism of each rete also more than 99.9%; Cut out a through slot at the cylindrical shell medium line, its size matches with the size of photoelectricity crystalline ceramics; PMN-PT photoelectricity crystalline ceramics 5 is inserted in the groove of cylindrical shell 6 centres, with solidifying glue bond; Collimating apparatus 1 and 10, two collimating apparatuss of back collimating apparatus are aimed at automatically by the cylindrical shell intracoelomic cavity before insert respectively at cylindrical shell 6 two ends, with solidifying glue it are bonded in the housing chamber after the adjusting collimating apparatus.
Principle of work of the present utility model is: the polycrystalline structure of PMN-PT transparent photoelectric pottery is a Ca-Ti ore type, belongs to a class relaxation material, the electric field that has isotropic least energy rock-steady structure and twist easily.Under External Electrical Field, all farmlands are all tended to external electric field and are arranged, and promptly polarize, and light will produce birefringence, thereby shows very strong electrooptical effect.Anti-reflection film can reduce the light wave loss in the transmission course.
The input light wave becomes directional light after by preceding collimating apparatus, after this directional light passes preceding transmission film 2 and front-reflection film 3, enter in the PMN-PT photoelectricity crystalline ceramics block 5 of transparency electrode 4 before being coated with, PMN-PT photoelectricity crystalline ceramics block 5 and front-reflection film 3, back reflection film 8 have formed Fabry-Perot-type cavity, birefringence effect takes place in light wave therein, and is attended by by the many interference of light that reflect to form; Light wave is behind Fabry-Perot-type cavity, pass back reflection film 8, the back transmission film 9 be transferred to again the back collimating apparatus 10 above, thereby obtain output light-wave. simultaneously, utilize the photoelectric effect of PMN-PT photoelectricity crystalline ceramics, on transparency electrode, apply external electric field, by changing the refractive index that extra electric field intensity changes the photoelectricity crystalline ceramics, can reach the tuning purpose of refractive index, thereby produce the effect of filter tunable filtering.
Claims (3)
1. transparent photoelectric ceramic-base tunable wave filter; It is characterized in that plating anti-reflection film, form collimating apparatus at an end face of collimation lens; Collimating apparatus is divided into preceding collimating apparatus (1) and back collimating apparatus (10), plate preceding transparency electrode (4) and back transparency electrode (7) respectively at the two ends of PMN-PT photoelectricity crystalline ceramics (5); Anti-reflection film (2) and back anti-reflection film (9) before preceding transparency electrode (4) and back transparency electrode (7) outside surface plate preceding high-reflecting film (3) and back high-reflecting film (8) more respectively, plate one deck more respectively again on preceding high-reflecting film (3) and back high-reflecting film (8); Cut out a through slot at cylindrical shell (6) medium line then, its size matches with the size of photoelectricity crystalline ceramics; PMN-PT photoelectricity crystalline ceramics (5) is inserted in the middle groove of cylindrical shell (6), with solidifying glue bond; Insert preceding collimating apparatus (1) and back collimating apparatus (10) respectively at cylindrical shell (6) two ends, two collimating apparatuss are aimed at automatically by cylindrical shell (6) inner chamber, with solidifying glue it are bonded in the housing chamber after the adjusting collimating apparatus.
2. it is characterized in that according to the described a kind of transparent photoelectric ceramic-base tunable wave filter of claim 1; An end face of collimation lens plates anti-reflection film, and the reflectivity of anti-reflection film is more than 99.0%.
3. it is characterized in that according to the described a kind of transparent photoelectric ceramic-base tunable wave filter of claim 1; Plate preceding high-reflecting film (3) and back high-reflecting film (8) in preceding transparency electrode (4) and back transparency electrode (7) outside surface, the reflectivity of high-reflecting film is more than 99.0%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200873888U CN201464752U (en) | 2009-07-17 | 2009-07-17 | Tunable filter based on transparent photoelectric ceramic |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009200873888U CN201464752U (en) | 2009-07-17 | 2009-07-17 | Tunable filter based on transparent photoelectric ceramic |
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| CN201464752U true CN201464752U (en) | 2010-05-12 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102075280A (en) * | 2010-12-11 | 2011-05-25 | 浙江工业大学 | Tunable Fabry-Perot cavity-based optical wavelength exchange device |
| CN103969822A (en) * | 2014-05-16 | 2014-08-06 | 武汉理工光科股份有限公司 | Electromagnet driving type Fabry-Perot optical filter adjustable in wave length |
| CN105633116A (en) * | 2014-12-01 | 2016-06-01 | 昆山国显光电有限公司 | OLED (Organic Light-Emitting Diode) device and manufacturing method therefor, and display apparatus |
| CN111856786A (en) * | 2019-04-30 | 2020-10-30 | 福州高意通讯有限公司 | Broadband electro-optic adjustable filtering structure |
-
2009
- 2009-07-17 CN CN2009200873888U patent/CN201464752U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102075280A (en) * | 2010-12-11 | 2011-05-25 | 浙江工业大学 | Tunable Fabry-Perot cavity-based optical wavelength exchange device |
| CN103969822A (en) * | 2014-05-16 | 2014-08-06 | 武汉理工光科股份有限公司 | Electromagnet driving type Fabry-Perot optical filter adjustable in wave length |
| CN103969822B (en) * | 2014-05-16 | 2016-02-10 | 武汉理工光科股份有限公司 | electromagnetic drive type wavelength tunable Fabry-Perot optical filter |
| CN105633116A (en) * | 2014-12-01 | 2016-06-01 | 昆山国显光电有限公司 | OLED (Organic Light-Emitting Diode) device and manufacturing method therefor, and display apparatus |
| CN105633116B (en) * | 2014-12-01 | 2018-11-13 | 昆山国显光电有限公司 | OLED device and its manufacturing method, display device |
| CN111856786A (en) * | 2019-04-30 | 2020-10-30 | 福州高意通讯有限公司 | Broadband electro-optic adjustable filtering structure |
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Granted publication date: 20100512 Termination date: 20130717 |