CN100427983C - Wave combiner / separator composed of tight coupled optical fiber grating group with micro insertion loss - Google Patents
Wave combiner / separator composed of tight coupled optical fiber grating group with micro insertion loss Download PDFInfo
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- CN100427983C CN100427983C CNB200610171583XA CN200610171583A CN100427983C CN 100427983 C CN100427983 C CN 100427983C CN B200610171583X A CNB200610171583X A CN B200610171583XA CN 200610171583 A CN200610171583 A CN 200610171583A CN 100427983 C CN100427983 C CN 100427983C
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- insertion loss
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Abstract
A method for preparing channel-integrating and channel-splitting filter synthesizing by micro-plug loss and high coupling optical fiber grating set includes obtaining high coupling optical fiber grating set by using laser of 248nm wavelength to etch double-core optical fiber with a phase mask, making plug-in loss of said grating set to be less than 1 dB, utilizing phase mask with different cycle to etch out high coupling optical fiber grating set with different wavelength, forming channel-integrating and channel-splitting filter in multiple wavelength by making said grating set be on different combination.
Description
Technical field
" the multiplexer/demultiplexer and the method for making that little Insertion Loss strong coupling fiber grating group is synthesized " of manufacturing of the present invention belongs to division multiplex fibre-optic communication wave and sensor-based system technical field, and the number of wavelengths that is specially adapted to multiplexer/demultiplexer can be by the optical fiber communication and the sensor-based system technical field of demand increase and decrease.
Background technology
Multiplexer/demultiplexer is the important composition parts of optical fiber communication and optical fiber sensing system.The multiplexer/demultiplexer that is adopted in the world at present has two types.A kind of is the multiplexer/demultiplexer of the accurate plated film of multilayer, and its manufacturing equipment is very expensive, and processing process is very complicated, so the price of this multiplexer/demultiplexer is very expensive.One 8 * 1 wave multiplexer and one 's 1 * 8 channel-splitting filter needs 8000 dollars, multipotency is accomplished 32 * 1 and 1 * 32 multiplexer/demultiplexer, price needs more than 30,000 dollar, and each insertion loss of closing ripple and partial wave is 2～4dB respectively, and the total insertion loss that closes wave separater is 4～8dB.Another kind is the Waveguide array multiplexer/demultiplexer, can accomplish 32～80 wavelength at present, its each close ripple and partial wave the insertion loss respectively be that the total insertion loss that 5～7dB closes wave separater is 10～14dB, almost need to add an image intensifer and compensate it and insert loss.The multiplexer/demultiplexer of 32 passages needs 3000 dollars approximately, but in order to compensate the insertion loss that it closes wave separater, needs to increase an image intensifer, needs 2000 dollars approximately, pays 5000 dollars so altogether, the present like this Waveguide array multiplexer/demultiplexer that mostly adopts.Above-mentioned two kinds of multiplexer/demultiplexers all can not arbitrarily be increased or reduced the number of wavelengths that it closes ripple and partial wave by the user, thus press for develop cheap little insertion loss can be by the multiplexer/demultiplexer of the number of wavelengths combination in any of user's request.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides multiplexer/demultiplexer and method for making that a kind of little Insertion Loss strong coupling fiber grating group is synthesized.
The technical scheme that technical solution problem of the present invention is adopted is:
The multiplexer/demultiplexer that a kind of little Insertion Loss strong coupling fiber grating group is synthesized, it is characterized in that: the strong coupling fiber grating group by a plurality of different wave lengths is in series, this strong coupling fiber grating group is utilized the laser instrument of 248nm wavelength to scribe by twin-core fiber with same phase mask plate and is formed, and it inserts loss＜1dB.
One of feature, strong coupling fiber grating group are to utilize fiber grating phase mask plate and 248nm laser instrument to scribe into strong coupling fiber grating group after hydrogen carries by twin-core light-sensitive optical fibre or common double core fibre.
One of feature, the method for making of the multiplexer/demultiplexer that little Insertion Loss strong coupling fiber grating group is synthesized, contain and have the following steps: at first make two prefabricated rods with photosensitive property, it is the D type that two prefabricated rods are worn into shape of cross section, again these two D type prefabricated rods are put into sleeve pipe symmetrically, or add the quartz fibre of filling usefulness, make high-quality twin-core fiber prefabricated rods, be drawn into twin-core fiber by wire drawing machine again, wherein each root optical fiber all is single mode.
One of feature is used to make the phase mask plate of little Insertion Loss strong coupling fiber grating, and its effective width is 9-12mm.
One of feature, the multiplexer/demultiplexer that little Insertion Loss strong coupling fiber grating group is synthesized, its number of wavelengths of closing ripple and partial wave is 4～80 wavelength.
The present invention's " multiplexer/demultiplexer that little Insertion Loss strong coupling fiber grating group is synthesized " cost reduces by 1 order of magnitude than present Waveguide array multiplexer/demultiplexer, and economic benefit and social benefit are very remarkable.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is little Insertion Loss strong coupling fiber grating group structural representation.
Fig. 2 is the wave multiplexer structural representation that little Insertion Loss strong coupling fiber grating group is synthesized.
Fig. 3 is the channel-splitting filter structural representation that little Insertion Loss strong coupling fiber grating group is synthesized.
Embodiment
The present invention's " multiplexer/demultiplexer that little Insertion Loss strong coupling fiber grating group is synthesized " is that the strong coupling fiber grating group by 4～80 different wave lengths is in series, and the concrete number of wherein used strong coupling fiber grating group is determined by actual request for utilization.This strong coupling fiber grating group is that twin-core fiber utilizes the laser instrument of 248nm wavelength to scribe with a phase mask plate to form, and it inserts loss＜1dB, as shown in Figure 1.Utilize the phase mask plate of different cycles can cut out the strong coupling fiber grating group of different wave length.The various combination of these fiber grating groups can be made the wave multiplexer and the channel-splitting filter of 4～80 wavelength, shown in accompanying drawing 2,3.
Develop strong coupling fiber grating group, at first need to develop novel phase mask plate.At present general its effective width of phase mask plate is 3mm, and the effective width of this novel phase mask plate need increase 3～4 times.
Develop strong coupling fiber grating group, also need to develop twin-core fiber.This twin-core fiber can be the twin-core light-sensitive optical fibre, also can be that the common double core fibre utilizes above-mentioned fiber grating phase mask plate and 248nm laser instrument to scribe into strong coupling fiber grating group after hydrogen carries.
1 core component of the present invention is exactly the fiber grating group with strong coupling.This fiber grating group is utilized the laser instrument of 248nm wavelength to scribe by twin-core fiber with same phase mask plate and is formed, and it inserts loss＜1dB.
The effective width of 2 this novel phase mask plates need increase 3～4 times than present mask plate, and its manufacturing process flow is as follows: quartz plate cleans, gold-plated, vacuum bakeout, whirl coating, quarter glue, carve gold, remove photoresist, carve quartz, phase mask plate is made.
The development of 3 twin-core fibers.At first make two prefabricated rods with photosensitive property, two prefabricated rods are worn into the D type, again these two D type prefabricated rods are put into sleeve pipe symmetrically, also can add the quartz fibre of filling usefulness in case of necessity and make high-quality twin-core fiber prefabricated rods, be drawn into twin-core fiber by wire drawing machine again.Wherein each root optical fiber all is single mode.
4 usefulness ordinary optic fibres 1,2,3,4 connect into the fiber grating group of strong coupling with above-mentioned twin-core fiber, as shown in Figure 1.
The 5 fiber grating group series connection with the strong coupling of each different wave length can be formed the wave multiplexer of any a plurality of wavelength, as shown in Figure 2.Here, optical fiber 5 connects input signal, and optical fiber 6 connects the signal that need close ripple, and then optical fiber 7 outputs is exactly the composite signal of optical fiber 5,6 input signals, and optical fiber 8 is unsettled.With the fiber grating group series connection of the strong coupling of each different wave length, just made required wave multiplexer so repeatedly.With the fiber grating group series connection of the strong coupling of each different wave length, also can form the channel-splitting filter of any a plurality of wavelength, as shown in Figure 3.Here, optical fiber 9 connects input signal, and optical fiber 10 is unsettled, and then optical fiber 11 output is exactly the signal of removing in optical fiber 9 input signals after being gone out wavelength by the fiber grating component of this strong coupling, the wavelength signals for being told of optical fiber 12 outputs.With the fiber grating group series connection of the strong coupling of each different wave length, just made required channel-splitting filter so repeatedly.
Claims (5)
1, the multiplexer/demultiplexer that synthesized of a kind of little Insertion Loss strong coupling fiber grating group, it is characterized in that: the strong coupling fiber grating group by a plurality of different wave lengths is in series, this strong coupling fiber grating group is utilized the laser instrument of 248nm wavelength to scribe by twin-core fiber with same phase mask plate and is formed, and it inserts loss＜1dB.
2, the multiplexer/demultiplexer that synthesized of a kind of little Insertion Loss strong coupling fiber grating group according to claim 1, it is characterized in that strong coupling fiber grating group is to utilize fiber grating phase mask plate and 248nm laser instrument to scribe into strong coupling fiber grating group by twin-core light-sensitive optical fibre or common double core fibre after hydrogen carries.
3, the multiplexer/demultiplexer that synthesized of little Insertion Loss strong coupling fiber grating group according to claim 1 is made the method for making with twin-core fiber, it is characterized in that, contain and have the following steps: at first make two prefabricated rods with photosensitive property, it is the D type that two prefabricated rods are worn into shape of cross section, again these two D type prefabricated rods are put into sleeve pipe symmetrically, or the quartz fibre of usefulness is filled in adding, make high-quality twin-core fiber prefabricated rods, be drawn into twin-core fiber by wire drawing machine again, wherein each root optical fiber all is single mode.
4, powerful coupled fiber grating group is made the phase mask plate of usefulness in the multiplexer/demultiplexer that a kind of little Insertion Loss strong coupling fiber grating group according to claim 1 and 2 is synthesized, and it is characterized in that the effective width of phase mask plate is 9-12mm.
5, the multiplexer/demultiplexer that synthesized of a kind of little Insertion Loss strong coupling fiber grating group according to claim 1 and 2 is characterized in that the number of wavelengths of closing ripple and partial wave is 4～80 wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610171583XA CN100427983C (en) | 2006-12-31 | 2006-12-31 | Wave combiner / separator composed of tight coupled optical fiber grating group with micro insertion loss |
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| CNB200610171583XA CN100427983C (en) | 2006-12-31 | 2006-12-31 | Wave combiner / separator composed of tight coupled optical fiber grating group with micro insertion loss |
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| CN101004465A CN101004465A (en) | 2007-07-25 |
| CN100427983C true CN100427983C (en) | 2008-10-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102608711A (en) * | 2012-04-10 | 2012-07-25 | 北京交通大学 | Up-and-down voice channel evice based on blazed fiber brag gratings |
| CN113589438B (en) * | 2021-07-29 | 2022-09-23 | 西南交通大学 | Linear polarization Sagnac total reflection mirror based on double-core optical fiber, method and optical system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10209501A (en) * | 1997-01-20 | 1998-08-07 | Mitsubishi Electric Corp | Multi-wavelength light source |
| US20010028766A1 (en) * | 1999-11-23 | 2001-10-11 | Hamid Hatami-Hanza | Interferometer based optical devices such as amplifiers |
| CN2543286Y (en) * | 2002-05-17 | 2003-04-02 | 李志扬 | Wave division multiplexer/demultiplexer based on array waveguide interferometer |
| CN1862300A (en) * | 2006-06-19 | 2006-11-15 | 中国科学院上海光学精密机械研究所 | Tunable double parallel matching fiber grating demodulation system |
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2006
- 2006-12-31 CN CNB200610171583XA patent/CN100427983C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10209501A (en) * | 1997-01-20 | 1998-08-07 | Mitsubishi Electric Corp | Multi-wavelength light source |
| US20010028766A1 (en) * | 1999-11-23 | 2001-10-11 | Hamid Hatami-Hanza | Interferometer based optical devices such as amplifiers |
| CN2543286Y (en) * | 2002-05-17 | 2003-04-02 | 李志扬 | Wave division multiplexer/demultiplexer based on array waveguide interferometer |
| CN1862300A (en) * | 2006-06-19 | 2006-11-15 | 中国科学院上海光学精密机械研究所 | Tunable double parallel matching fiber grating demodulation system |
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