CN102012573A - Liquid crystal photon crystal fiber tunable narrowband filter and manufacturing method thereof - Google Patents
Liquid crystal photon crystal fiber tunable narrowband filter and manufacturing method thereof Download PDFInfo
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- CN102012573A CN102012573A CN 201010559078 CN201010559078A CN102012573A CN 102012573 A CN102012573 A CN 102012573A CN 201010559078 CN201010559078 CN 201010559078 CN 201010559078 A CN201010559078 A CN 201010559078A CN 102012573 A CN102012573 A CN 102012573A
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- liquid crystal
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 45
- 239000000835 fiber Substances 0.000 title claims abstract description 41
- 239000013078 crystal Substances 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000003287 optical effect Effects 0.000 claims abstract description 8
- 230000010287 polarization Effects 0.000 claims abstract description 6
- 239000004038 photonic crystal Substances 0.000 claims description 33
- 239000013307 optical fiber Substances 0.000 claims description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 16
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 16
- 239000011248 coating agent Substances 0.000 claims description 13
- 238000000576 coating method Methods 0.000 claims description 13
- 239000000377 silicon dioxide Substances 0.000 claims description 8
- 235000012239 silicon dioxide Nutrition 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000004408 titanium dioxide Substances 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 2
- 238000004891 communication Methods 0.000 abstract description 7
- 230000008878 coupling Effects 0.000 abstract description 4
- 238000010168 coupling process Methods 0.000 abstract description 4
- 238000005859 coupling reaction Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract 1
- 238000007747 plating Methods 0.000 abstract 1
- 238000001338 self-assembly Methods 0.000 abstract 1
- 239000010408 film Substances 0.000 description 13
- 239000011521 glass Substances 0.000 description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000000739 chaotic effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000004988 Nematic liquid crystal Substances 0.000 description 1
- 150000001263 acyl chlorides Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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Abstract
The invention provides a liquid crystal photon crystal fiber tunable narrowband filter and a manufacturing method thereof. The method comprises the following steps of: directly plating a multilayer dielectric film on a photon crystal fiber end face to form a one-dimensional photon crystal, performing photosensitive self-assembly film treatment on the dielectric film, and then performing polarization treatment under ultraviolet light; and butting two photon crystal fibers treated likewise on the dielectric film sides, injecting liquid crystal at the butted position, and putting the liquid crystal into a variable magnetic field to realize wavelength tuning function. The invention overcomes the defects of difficult coupling of the filter and an optical communication system, complex structure and mechanical motion, and meanwhile solves the problem of difficult liquid crystal control in a microscopic system. The tunable narrowband filter is easy to couple and easy to match with an all optical network, and has the advantages of simple structure, large tuning range, low cost and the like.
Description
Technical field
What the present invention relates to is a kind of tunable narrow-band wave filter, the present invention also relates to a kind of method for making of optical fiber liquid crystal photon crystal tunable narrow-band wave filter.
Background technology
In advanced information society, along with needs information transmitted amount constantly increases, people also improve constantly the requirement of communication network.Dense wave division multipurpose (DWDM) technology provides at a high speed, the best mode of high-capacity optical fiber communication system, along with the fast development of DWDM in optical communication system, the required port number that holds of simple optical fiber is more and more, for the some wavelength in the hyperchannel are handled, just must use multiplexing and demodulation multiplexer.Realization at present is multiplexing and method demodulation multiplexer is a lot, mainly contain Thin Film Filter, array waveguide grating or the like, but these all is untunable wave filter.Yet following optical-fiber network will be towards intelligence, flexible and configurability aspect development, and the wave filter that possesses tunable function is the important devices that realizes this trend.The tunable optic filter of research mainly comprises now: acousto-optic tunable filter, piezoelectric ceramics Fabry-Bo Luo Gan relates to wave filter, mach zhender interference filter etc.The acousto-optic tunable filter tunable range is greater than 100 nanometers, but their bandwidth is narrow inadequately.Piezoelectric ceramics Fabry glass Luo Gan relates to wave filter, though enough big tunable range and narrow bandwidth are arranged, owing to require very high bearing accuracy to make that making is very difficult.The mach zhender interference filter has very narrow bandwidth, but not enough by the degree of depth.
At present, all on glass substrate, be coated with multilayer dielectric film for the research of liquid crystal photon crystal filter and realize the narrow-band filtering function.And in the optical communication of reality, all be based on optical-fibre communications, will bring the problem of glass devices and optical fiber coupling difficulty like this, and because the use of glass can cause also the light energy losses serious.
Current also have the people that liquid crystal is directly injected photonic crystal fiber to carry out tuning research, and this structure can be used as bandpass filter, but can not be used for narrow band filter.And the liquid crystal in the photonic crystal fiber can not artificially be controlled, and liquid crystal is in chaotic the arrangement, be that condition of equivalent thickness liquid crystal wavelength tuning range reduces thereby cause the utilization factor reduction of liquid crystal, so the degree of depth that liquid crystal injects in optical fiber generally reaches 20 millimeters.And because liquid crystal is in chaotic the arrangement, the light scattering of liquid crystal strengthens, and makes light loss reach about 15-40dB/ centimetre.
Summary of the invention
The object of the present invention is to provide a kind of humorous narrow band filter of liquid crystal photon crystal optical-fibre adjustable that is coupled with Fiber Optical Communication System easily.The present invention also aims to provide the method for making of the humorous narrow band filter of a kind of liquid crystal photon crystal optical-fibre adjustable.
The object of the present invention is achieved like this:
The humorous narrow band filter of liquid crystal photon crystal optical-fibre adjustable of the present invention comprises two photonic crystal fibers, on a section of every photonic crystal fiber, silicon dioxide and titania deielectric-coating alternately have been coated with, the deielectric-coating end face is carried out carrying out after photosensitive self-assembled film is handled the end face butt joint that has deielectric-coating of two photonic crystal fibers that the ultraviolet light polarization handles again, and joint is marked with liquid crystal.
The humorous narrow band filter of liquid crystal photon crystal optical-fibre adjustable of the present invention can also comprise:
1, the silicon dioxide of every photonic crystal fiber section is identical with the number of plies of titania deielectric-coating, is respectively the 3-5 layer.
2, the joint spacing of every photonic crystal fiber is in 775 nanometers.
The humorous narrow band filter of liquid crystal photon crystal optical-fibre adjustable of the present invention is to adopt such method to make:
(1) selecting the smooth core of two butt faces is solid photonic crystal fiber alternately is coated with the identical number of plies by the optical thickness of 1550 nanometers in its end face side silicon dioxide and titanium dioxide film;
(2) the deielectric-coating end face is carried out carrying out the ultraviolet light polarization and handling after photosensitive self-assembled film handles;
(3) utilize fibre clip, little platform that moves to dock by the end with the photonic crystal fiber that microscope will be coated with multilayer film, spacing is controlled at 775 nanometers;
(4) liquid crystal is heated to the interface that injects two photonic crystal fibers behind the cleaning point;
(5) utilize externally-applied magnetic field that the liquid crystal of photonic crystal fiber interface is controlled.
The humorous narrow band filter of liquid crystal photon crystal optical-fibre adjustable of the present invention is multilayer dielectric film directly to be coated on the photonic crystal fiber end face form 1-D photon crystal, is carrying out carrying out the polarization processing after photosensitive self-assembled film is handled under ultraviolet light on the deielectric-coating.Did the same photonic crystal fibers of handling with two and dock by side dielectric film, joint injects liquid crystal, puts it in the magnetic field of variation and can realize the wavelength tuning function.
The humorous wave filter of this liquid crystal photon crystal optical-fibre adjustable of method preparation of the present invention is stablized good reproducibility, can be in optimum Working 5～30 ℃ of temperature ranges, is easy to carry out the output of computer control wavelength.
With respect to acousto-optic tunable filter, piezoelectric ceramics Fabry-Bo Luo Gan relates to wave filter, mach zhender interference filters etc., liquid crystal photon crystal optical fiber filter of the present invention have easy coupling, can mate with all-optical network, simple in structure, low-voltage driving, do not have advantages such as mechanical motion, volume be little.
The present invention proposes to solve between this device and be difficult for coupling problems, and can reduce light loss greatly.Proposed directly to be coated with the method for multilayer dielectric film among the present invention, proposed a kind of novel liquid crystal photon crystal optical fiber filter at the photonic crystal fiber end face.
The present invention proposes and utilize light-operated method, make the arrangement of liquid crystal in microscopic system artificially to control, thereby improve the liquid crystal utilization factor, reduce thickness of liquid crystal layer, reduce optical loss liquid crystal aligning.
Description of drawings
Fig. 1 is the structural representation of the humorous narrow band filter of liquid crystal photon crystal optical-fibre adjustable among the present invention
Embodiment
In conjunction with Fig. 1, the humorous narrow band filter of liquid crystal photon crystal optical-fibre adjustable of the present invention comprises two photonic crystal fibers 1, silicon dioxide 2, titania 3, alignment films 4, liquid crystal 4.
The humorous narrow band filter of liquid crystal photon crystal optical-fibre adjustable of the present invention is to adopt such method to prepare:
(1) selecting two cores is the photonic crystal fiber that solid end face flatness is better than 10 nanometers, utilize H447700-7 molding box formula coating machine, in photonic crystal fiber end face one side, alternately being coated with thickness respectively is the silicon dioxide and the titanium dioxide film of 265 nanometers and 165 nanometers, plates 5 pairs altogether;
(2) being stained with concentration at the photonic crystal fiber deielectric-coating end face libation at an ancient wedding ceremony is 1% polyvinyl alcohol (PVA) (PVA) aqueous solution, photonic crystal fiber was placed in the baking oven of 100 flood 20 minutes, subsequently the photonic crystal fiber end face is dipped in the acyl chlorides anhydrous toluene solution of 0.5 mg/ml and (keeps 40 ℃ of temperature), take out after 20 minutes, alcohol flushing, nitrogen dries up;
(3) the photonic crystal fiber end face of handling well is carried out perpendicular end surface irradiation 20 minutes under linear polarized uv.Ultraviolet source is 400 watts a Hg-Xe lamp, places the Glan-Talor prism thereafter and obtains linear polarized uv, and be 0.30 milliwatt/square centimeter in wavelength 297 nanometers light intensity;
(4) utilize fibre clip, the little platform that moves of nanometer to dock by the end with the photonic crystal fiber that microscope will be coated with multilayer film, require the direction of orientation of the alignment films of light-operated processing to parallel, spacing is controlled at 775 nanometers;
(5) will be the interface that injects two photonic crystal fibers after 0.19 pure nematic liquid crystal (RDP-92975, big Japanese ink company) is heated to cleaning point at near-infrared band refractive index anisotropy value;
(6) utilize energization solenoid that the liquid crystal of photonic crystal fiber interface is controlled.
Claims (4)
1. humorous narrow band filter of liquid crystal photon crystal optical-fibre adjustable, comprise two photonic crystal fibers, it is characterized in that: on a section of every photonic crystal fiber, alternately be coated with silicon dioxide and titania deielectric-coating, the deielectric-coating end face is carried out carrying out after photosensitive self-assembled film is handled the end face butt joint that has deielectric-coating of two photonic crystal fibers that the ultraviolet light polarization handles again, and joint is marked with liquid crystal.
2. the humorous narrow band filter of liquid crystal photon crystal optical-fibre adjustable according to claim 1 is characterized in that: the silicon dioxide of a section of every photonic crystal fiber is identical with the number of plies of titania deielectric-coating, is respectively the 3-5 layer.
3. the humorous narrow band filter of liquid crystal photon crystal optical-fibre adjustable according to claim 1 and 2 is characterized in that: the joint spacing of every photonic crystal fiber is in 775 nanometers.
4. the method for making of the humorous narrow band filter of liquid crystal photon crystal optical-fibre adjustable is characterized in that:
(1) selecting the smooth core of two butt faces is solid photonic crystal fiber alternately is coated with the identical number of plies by the optical thickness of 1550 nanometers in its end face side silicon dioxide and titanium dioxide film;
(2) the deielectric-coating end face is carried out carrying out the ultraviolet light polarization and handling after photosensitive self-assembled film handles;
(3) utilize fibre clip, little platform that moves to dock by the end with the photonic crystal fiber that microscope will be coated with multilayer film, spacing is controlled at 775 nanometers;
(4) liquid crystal is heated to the interface that injects two photonic crystal fibers behind the cleaning point;
(5) utilize externally-applied magnetic field that the liquid crystal of photonic crystal fiber interface is controlled.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105590789A CN102012573B (en) | 2010-11-25 | 2010-11-25 | Liquid crystal photon crystal fiber tunable narrowband filter and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105590789A CN102012573B (en) | 2010-11-25 | 2010-11-25 | Liquid crystal photon crystal fiber tunable narrowband filter and manufacturing method thereof |
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| CN102012573A true CN102012573A (en) | 2011-04-13 |
| CN102012573B CN102012573B (en) | 2012-03-14 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324907A (en) * | 2011-07-06 | 2012-01-18 | 中国计量学院 | Terahertz wave adjustable narrow band filter based on silicon-based photonic crystal structure |
| CN103278942A (en) * | 2013-05-30 | 2013-09-04 | 中国科学院半导体研究所 | Tunable active filter |
| CN103713411A (en) * | 2014-01-09 | 2014-04-09 | 浙江师范大学 | Method for manufacturing tunable band-pass optical fiber filter |
| CN107421623A (en) * | 2017-05-11 | 2017-12-01 | 哈尔滨工程大学 | The piezoelectric ceramic type non-coherent optical fiber hydrophone and preparation method of integrated liquid crystal |
| CN109445155A (en) * | 2018-12-22 | 2019-03-08 | 复旦大学 | A kind of unpolarized type narrow-band optical bandpass filter of electric tuning |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050169590A1 (en) * | 2003-12-31 | 2005-08-04 | Crystal Fibre A/S | Liquid crystal infiltrated optical fibre, method of its production, and use thereof |
| CN101308246A (en) * | 2007-05-18 | 2008-11-19 | 同济大学 | Wavelength adjustable filter |
| CN201917739U (en) * | 2010-11-25 | 2011-08-03 | 哈尔滨工程大学 | Tunable narrow-band filter for liquid crystal photonic crystal fibers |
-
2010
- 2010-11-25 CN CN2010105590789A patent/CN102012573B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050169590A1 (en) * | 2003-12-31 | 2005-08-04 | Crystal Fibre A/S | Liquid crystal infiltrated optical fibre, method of its production, and use thereof |
| CN101308246A (en) * | 2007-05-18 | 2008-11-19 | 同济大学 | Wavelength adjustable filter |
| CN201917739U (en) * | 2010-11-25 | 2011-08-03 | 哈尔滨工程大学 | Tunable narrow-band filter for liquid crystal photonic crystal fibers |
Non-Patent Citations (1)
| Title |
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| 《半导体光电》 20091031 钱祥忠 基于液晶填充的带隙型光子晶体光纤的滤波特性 687-690 1-4 第30卷, 第5期 2 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324907A (en) * | 2011-07-06 | 2012-01-18 | 中国计量学院 | Terahertz wave adjustable narrow band filter based on silicon-based photonic crystal structure |
| CN102324907B (en) * | 2011-07-06 | 2014-04-16 | 中国计量学院 | Terahertz wave adjustable narrow band filter based on silicon-based photonic crystal structure |
| CN103278942A (en) * | 2013-05-30 | 2013-09-04 | 中国科学院半导体研究所 | Tunable active filter |
| CN103278942B (en) * | 2013-05-30 | 2015-11-04 | 中国科学院半导体研究所 | Tunable active optical filter |
| CN103713411A (en) * | 2014-01-09 | 2014-04-09 | 浙江师范大学 | Method for manufacturing tunable band-pass optical fiber filter |
| CN103713411B (en) * | 2014-01-09 | 2023-06-30 | 浙江师范大学 | Manufacturing method of tunable band-pass optical fiber filter |
| CN107421623A (en) * | 2017-05-11 | 2017-12-01 | 哈尔滨工程大学 | The piezoelectric ceramic type non-coherent optical fiber hydrophone and preparation method of integrated liquid crystal |
| CN107421623B (en) * | 2017-05-11 | 2019-09-27 | 哈尔滨工程大学 | The piezoelectric ceramic type non-coherent optical fiber hydrophone and preparation method of integrated liquid crystal |
| CN109445155A (en) * | 2018-12-22 | 2019-03-08 | 复旦大学 | A kind of unpolarized type narrow-band optical bandpass filter of electric tuning |
| CN109445155B (en) * | 2018-12-22 | 2021-07-23 | 复旦大学 | Electrically tuned non-polarized narrow-band optical band-pass filter |
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| Publication number | Publication date |
|---|---|
| CN102012573B (en) | 2012-03-14 |
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