CN204116743U - Tunable band leads to optical fiber filter - Google Patents
Tunable band leads to optical fiber filter Download PDFInfo
- Publication number
- CN204116743U CN204116743U CN201420018937.7U CN201420018937U CN204116743U CN 204116743 U CN204116743 U CN 204116743U CN 201420018937 U CN201420018937 U CN 201420018937U CN 204116743 U CN204116743 U CN 204116743U
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- China
- Prior art keywords
- optical fibre
- input
- output
- liquid crystal
- fiber filter
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- Expired - Fee Related
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 81
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 26
- 239000003708 ampul Substances 0.000 claims abstract description 18
- 239000010453 quartz Substances 0.000 claims abstract description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000035945 sensitivity Effects 0.000 claims abstract description 5
- 239000000835 fiber Substances 0.000 claims description 16
- 230000003287 optical effect Effects 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000001914 filtration Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
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- Liquid Crystal (AREA)
Abstract
The utility model belongs to optical fiber technology and optical filtering technology field, relate to the tunable band of a kind of temperature control based on liquid crystal and leads to optical fiber filter.Comprise one section of input optical fibre, one section of quartz ampoule, a kind of liquid crystal of refractive index versus temperature sensitivity, one section of output optical fibre, attemperating unit.The input end of the output terminal of input optical fibre, liquid crystal and output optical fibre is connected successively in quartz ampoule; Input optical fibre, quartz ampoule, liquid crystal, output optical fibre are all sealed in attemperating unit inside; The input port of input optical fibre leads to the input port of optical fiber filter as tunable band; The output port of output optical fibre leads to the output port of optical fiber filter as tunable band.There is the advantages such as manufacture craft is simple, cost is low, tuning manner is simple.
Description
Technical field
The utility model belongs to optical fiber technology and optical filtering technology field, particularly a kind of temperature control turnable fiber filter based on liquid crystal.
Background technology
The invention of optical fiber, brings the revolutionary variation of the communications field, and the optical communication system based on optical fiber becomes the foundation stone of modern information society.Along with the progress of optical fiber technology and the development of optical communication, comprise optical fiber filter fiber functions device obtain huge development.Optical fiber filter optical communication, Fibre Optical Sensor, fiber laser and a lot of based on the equipment of optical spectra in there is important using value.Optical fiber filter has the particular advantages such as optical fiber compatibility, centre wavelength is tunable.
The optical fiber filter of existing report mainly comprises at present: 1, Fiber Bragg Grating FBG optical fiber filter is a kind of reflection type optical fiber filter, belongs to transmission-type band resistance optical fiber filter; 2, long period fiber grating optical fiber filter is also a kind of transmission-type band resistance optical fiber filter; 3, Fabry-Perot fiber optic wave filter, belongs to transmission-type bandpass filter, and its major defect is complex manufacturing technology, expensive; 4, Sa De nanogram fiber optic loop wave filter is a kind of combed filter device.Therefore, develop simple, the lower-cost transmission-type band of a kind of manufacture craft to lead to optical fiber filter there is important using value.
Summary of the invention
The utility model is exactly for the deficiencies in the prior art, proposes the tunable band of a kind of temperature control based on liquid crystal and leads to optical fiber filter.
The technical scheme that the utility model technical solution problem is taked:
The utility model comprises one section of input optical fibre, one section of quartz ampoule, a kind of liquid crystal of refractive index versus temperature sensitivity, one section of output optical fibre, attemperating unit.
The input end of the output terminal of input optical fibre, liquid crystal and output optical fibre is connected successively in quartz ampoule; Input optical fibre, quartz ampoule, liquid crystal, output optical fibre are all sealed in attemperating unit inside; The input port of input optical fibre leads to the input port of optical fiber filter as tunable band; The output port of output optical fibre leads to the output port of optical fiber filter as tunable band.
Described input optical fibre and output optical fibre are the general single mode fiber that diameter is 100 microns to 150 microns.
Described quartz ampoule internal diameter is consistent with the external diameter of input optical fibre and output optical fibre, and external diameter is 500 microns to 5000 microns.
The liquid crystal of described a kind of refractive index versus temperature sensitivity, its refractive index changes with temperature linearity in 0 degree to 30 degree, and refractive index is greater than quartzy refractive index.
The utility model is mainly applicable to the fields such as optical communication, Fibre Optical Sensor, fiber laser, utilize and adopt the liquid crystal be sealed in quartz ampoule as the tuning medium of light refractive index, based on the multimode interference principle of the multimode waveguide that liquid crystal and quartz ampoule are formed, the single-mode fiber of employing standard, as input/output port, realizes filter transmission peak with thermal tuning tuning.The utility model has the advantages such as manufacture craft is simple, cost is low, tuning manner is simple.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present utility model;
Fig. 2 is that in embodiment, in 20 degree of situations, tunable band leads to the transmitted light spectrogram of optical fiber filter;
Fig. 3 is the graph of a relation that attemperating unit design temperature and tunable band lead to optical fiber filter transmission peaks.
Embodiment
As shown in Figure 1, the device made based on the temperature control turnable fiber filter of liquid crystal comprises one section of input optical fibre, 1, one section of quartz ampoule 2, liquid crystal 3, one section of output optical fibre 4 and attemperating unit 5.
The input end of the output terminal of input optical fibre 1, liquid crystal 3 and output optical fibre 4 is connected successively in quartz ampoule 2; Input optical fibre 1, quartz ampoule 2, liquid crystal 3, output optical fibre 4 are all sealed in attemperating unit 5 inside; The input port of input optical fibre 1 leads to the input port of optical fiber filter as tunable band; The output port of output optical fibre 4 leads to the output port of optical fiber filter as tunable band.Input optical fibre 1 and output optical fibre 4 are the general single mode fiber that external diameter is 125 microns, length is 25 centimetres, fiber end face passes through good process; The normal temperature refractive index of liquid crystal 3 was 1.51 (being greater than quartzy refractive index 1.444) and refractive index reduces with temperature linearity; The external diameter of quartz ampoule 2 is 1000 microns, and internal diameter is 125 microns, and length is 10 centimetres; Attemperating unit 5 can precise control of temperature within the scope of 0 to 100 degree.
This is tunable, and band leads to that optical fiber filter specific works process is as follows:
Enter the light that tunable band leads to optical fiber filter and enter into lcd segment from input optical fibre, because liquid crystal does not have core structure, the light of transmission defines multiple-mode interfence at the input end of output optical fibre.According to the principle of multiple-mode interfence, wavelength is only had to be that the light of λ (T) just can enter output optical fibre and export from the output terminal of output optical fibre.From tunable band lead to optical fiber filter through the wavelength X (T) of light be proportional to length (L) and the refractive index n (T) of liquid crystal in quartz ampoule:
λ(T)＝kLn(T) (1)
Wherein k is constant, and n (T) represents that liquid-crystal refractive-index varies with temperature and changes.According to formula (1), regulate the temperature of attemperating unit, namely adjustable liquid crystal display temperature, just can realize tunable band and lead to the tuning of optical fiber filter transmission peaks.
The transmitted light spectrogram of the utility model measured by when attemperating unit set temperature is 20 degree as shown in Figure 2; Attemperating unit design temperature and tunable band lead to the relation of optical fiber filter transmission peaks as shown in Figure 3.
Claims (1)
1., based on the temperature control turnable fiber filter of liquid crystal, comprise one section of input optical fibre, one section of quartz ampoule, a kind of liquid crystal of refractive index versus temperature sensitivity, one section of output optical fibre, attemperating unit, it is characterized in that:
The input end of the output terminal of input optical fibre, liquid crystal and output optical fibre is connected successively in quartz ampoule; Input optical fibre, quartz ampoule, liquid crystal, output optical fibre are all sealed in attemperating unit inside; The input port of input optical fibre leads to the input port of optical fiber filter as tunable band; The output port of output optical fibre leads to the output port of optical fiber filter as tunable band;
Described input optical fibre and output optical fibre are the general single mode fiber that diameter is 100 microns to 150 microns;
Described quartz ampoule internal diameter is consistent with the external diameter of input optical fibre and output optical fibre, and external diameter is 500 microns to 5000 microns;
The liquid crystal of described a kind of refractive index versus temperature sensitivity, its refractive index changes with temperature linearity in 0 degree to 30 degree, and refractive index is greater than quartzy refractive index.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420018937.7U CN204116743U (en) | 2014-01-09 | 2014-01-09 | Tunable band leads to optical fiber filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420018937.7U CN204116743U (en) | 2014-01-09 | 2014-01-09 | Tunable band leads to optical fiber filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204116743U true CN204116743U (en) | 2015-01-21 |
Family
ID=52334036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420018937.7U Expired - Fee Related CN204116743U (en) | 2014-01-09 | 2014-01-09 | Tunable band leads to optical fiber filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204116743U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105371981A (en) * | 2015-11-23 | 2016-03-02 | 大连理工大学 | Inner wall-silver plated and liquid crystal-filled hollow optical fiber surface plasmon resonance temperature sensor |
| CN111220296A (en) * | 2020-01-21 | 2020-06-02 | 金华伏安光电科技有限公司 | Microcavity type temperature sensor and system |
-
2014
- 2014-01-09 CN CN201420018937.7U patent/CN204116743U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105371981A (en) * | 2015-11-23 | 2016-03-02 | 大连理工大学 | Inner wall-silver plated and liquid crystal-filled hollow optical fiber surface plasmon resonance temperature sensor |
| CN111220296A (en) * | 2020-01-21 | 2020-06-02 | 金华伏安光电科技有限公司 | Microcavity type temperature sensor and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150121 Termination date: 20160109 |