CN102721997A - Optical switch and optical path control system thereof - Google Patents
Optical switch and optical path control system thereof Download PDFInfo
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- CN102721997A CN102721997A CN2012101790535A CN201210179053A CN102721997A CN 102721997 A CN102721997 A CN 102721997A CN 2012101790535 A CN2012101790535 A CN 2012101790535A CN 201210179053 A CN201210179053 A CN 201210179053A CN 102721997 A CN102721997 A CN 102721997A
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- photoswitch
- photonic crystal
- mixed solution
- crystal fiber
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Abstract
The invention discloses an optical switch and an optical path control system thereof. The optical switch comprises a refractive index guide photonic crystal fiber. A cladding of the refractive index guide photonic crystal fiber has the diameter of 125 micrometers and is formed by air vent holes which are uniformly arranged in a triangular shape; each air vent hole has the diameter of 6 micrometers and eight layers of air vent holes are arranged at intervals of 6.4 micrometers in common; a fiber core region of the refractive index guide photonic crystal fiber is formed by pure quartz with the deficiency of two layers of air vent holes; the cladding is filled with mixed solution of toluene and ethanol and by regulating the temperature of the mixed solution, a waveguide of the refractive index guide photonic crystal fiber is controlled so as to implement the on-off conversion; and by regulating the proportion of the mixed solution, different temperature jump points are selected. By adopting the photonic crystal fiber all-optical path to replace a conventional optical switch structure, the MEMS (Micro Electro Mechanical System) control process and the photovoltaic conversion process are avoided, so that the optical switch has simple structure and flexible design, does not require the photovoltaic conversion, and has low cost.
Description
Technical field
The present invention relates to the photoswitch field, relate in particular to a kind of photoswitch and light path control system thereof.
Background technology
Photoswitch can play the effect of break-make and conversion to light signal as a kind of important optical passive component in optical network system.In association areas such as optical communication and photometry calculation, simple in structure is to determine one of gordian technique that can all-optical network be applied to put into practice with photoswitch dependable performance.According to different on-off principle, photoswitch is divided into two kinds of mechanical optical switch and non-mechanical optical switch.Mechanical optical switch mainly adopts the coupling of mechanical system and electromagnetic mode adjustment different fiber port, thereby realizes the break-make conversion of different light paths.The on-mechanical photoswitch mainly comprises magneto-optic shutter, thermo-optical switch, electrooptical switching and acoustooptic switch etc.
The inventor finds to exist at least in the prior art following shortcoming and defect in realizing process of the present invention:
Traditional photoswitch depends on MEMS (MEMS), photo-translating system and polarization control system etc., and complex structure needs the more high weakness of opto-electronic conversion and cost.
Summary of the invention
The invention provides a kind of photoswitch and light path control system thereof, the optical switch construction of the present invention design is simple, flexible design, with low cost and be easy to be applied to practice, sees hereinafter for details and describes:
A kind of photoswitch, said photoswitch comprises: index guide structure type photonic crystal fiber, the cladding diameter of said index guide structure type photonic crystal fiber is 125 microns, is made up of the airport of even triangle arrangement; The diameter of said airport is 6 microns, and spacing is 6.4 microns, totally 8 layers; The core region of said index guide structure type photonic crystal fiber is made up of the pure quartz of the two-layer airport of disappearance; In said covering, fill the mixed solution of toluene and ethanol,, control the waveguide of said index guide structure type photonic crystal fiber, realize the conversion of on-off through adjustment to said mixed solution; Through adjusting, select different temperatures transition point to said mixed solution proportioning.
Said mixed solution of in said covering, filling toluene and ethanol is specially:
Adopt mode that capillarity or vacuum take out pressure that the mixed solution of toluene and ethanol is filled in the covering of said index guide structure type photonic crystal fiber.
A kind of light path control system, said light path control system comprises: photoswitch and temperature control equipment,
Said temperature control equipment is regulated the mixed solution temperature in the said photoswitch; Single-mode fiber jumper is coupled to through adapter or fusing mode in the two ends of said photoswitch; One end of said single-mode fiber jumper connects semiconductor laser light resource; The other end connects power meter, and the light signal that said semiconductor laser light resource sends is coupled to said photoswitch through said single-mode fiber jumper, and said power meter is surveyed final output signal.
Said single-mode fiber jumper is specially: the single-mode fiber jumper of 1550nm, correspondingly,
Said semiconductor laser light resource is specially: the semiconductor laser light resource of 1550nm.
The beneficial effect of technical scheme provided by the invention is:
The invention provides a kind of photoswitch and light path control system thereof; Through adopting the full light light path of photonic crystal fiber to replace traditional optical switch construction; Avoided MEMS control procedure and photoelectric conversion process, made that optical switch construction is simple, flexible design, do not need that opto-electronic conversion, with low cost and suitable industry spot or laboratory are on-the-spot uses flexibly; This kind photoswitch on-off temperature saltus step scope reaches 2 ℃, and through suitable regulator solution proportioning, can adjust photoswitch jump in temperature point, makes it have more application prospects; The temperature control control device is regulated the inner photoswitch that is full of mixed solution, and through the loss of thermal tuning control photoswitch, thereby the break-make that realizes the power meter detected intensity responds.
Description of drawings
Fig. 1 a is the structural representation of a kind of photoswitch provided by the invention;
Fig. 1 b is a big space rate full-internal reflection type photonic crystals optical fiber structure parameter provided by the invention;
Fig. 2 is that the mixing material refractive index under different toluene provided by the invention-ethanol volume ratio condition concerns synoptic diagram with the temperature variation of photonic crystal fiber background material;
Fig. 3 a is that liquor capacity ratio provided by the invention is the transition situation of 7: 3 o'clock photoswitches under condition of different temperatures;
Fig. 3 b is that liquor capacity provided by the invention compares the transition situation of photoswitch under condition of different temperatures when being 8:2;
Fig. 4 is the funtcional relationship synoptic diagram of ethanol volume ratio in photoswitch jump in temperature point provided by the invention and the mixing material;
Fig. 5 is the structural representation of light path control provided by the invention system.
In the accompanying drawing, the list of parts of each label representative is following:
1: photoswitch; 2: single-mode fiber jumper;
3: temperature control equipment; 4: semiconductor laser light resource;
5: power meter.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that embodiment of the present invention is done to describe in detail further below.
Photonic crystal fiber is a kind of novel optical fiber, and the embodiment of the invention is that example describes with index guide structure type photonic crystal.The airport that exists in the index guide structure type photonic crystal fiber covering makes the effective refractive index of covering be lower than fibre core, thereby carries out leaded light through being similar to traditional step optical fiber total reflection principle.This optical fiber can be filled different materials and obtained different optical characteristics in airport, especially fill thermosensitive liquid, can realize good thermo-optical switch effect.That this device has is simple in structure, flexible design, advantage such as cheap, in the prospect that is widely used aspect the full optically functional device.The tunable photonic crystal optical fiber temperature-sensitive light switch design scheme of utilizing mixing material to fill is not arranged at present as yet.
For realize that optical switch construction is simple, flexible design, with low cost and be easy to be applied to practice, the embodiment of the invention provides a kind of photoswitch, referring to Fig. 1 a and Fig. 1 b, sees the hereinafter description for details:
A kind of photoswitch 1 comprises: index guide structure type photonic crystal fiber, and the cladding diameter of index guide structure type photonic crystal fiber is 125 microns, is made up of the airport of even triangle arrangement; The diameter of airport is 6 microns, and spacing is 6.4 microns, totally 8 layers; The core region of index guide structure type photonic crystal fiber is made up of the pure quartz of the two-layer airport of disappearance; In covering, fill the mixed solution of toluene-ethanol, through the adjustment to mixed solution, the waveguide of control index guide structure type photonic crystal fiber realizes the conversion of on-off; Through adjusting, select different temperatures transition point to the mixed solution proportioning.
Because the diameter of airport is 6 microns, spacing is 6.4 microns, and this index guide structure type photonic crystal fiber has bigger dutycycle for this reason.
The mixed solution of wherein, in covering, filling toluene-ethanol is specially: adopt mode that capillarity or vacuum take out pressure that the mixed solution of toluene-ethanol is filled in the covering of index guide structure type photonic crystal fiber.
Wherein, toluene and ethanol all are responsive to temperature liquid, and heat-sensitive coefficients is respectively-5.273 * 10
-4/ K and-3.940 * 10
-4/ K, the pure quartz of background material of specific refractivity guiding type photonic crystal fiber exceeds two one magnitude.
Wherein, when photoswitch 1 is longer, for example: during more than or equal to 1 meter, can adopt the mode of coiling to reduce the volume of device, improve integrated level.
Wherein, The method that the embodiment of the invention adopts capillarity or vacuum to take out pressure is filled into index guide structure type photonic crystal fiber with toluene-alcohol mixed solution; Through temperature effect mixing material refractive index, the waveguide condition of control index guide structure type photonic crystal fiber.When temperature reduced, cladding-effective-index increased, progressively near pure silica core refractive index; When cladding index and fiber core refractive index approximately equal; Index guide structure type photonic crystal fiber transforms into imperfect optical waveguide, and fibre core-cladding index difference is zero, can't guarantee effective transmission of luminous energy; Thereby cut off light signal, realized the conversion of on-off.The different proportionings of mixed solution can be selected different temperatures transition point according to the actual requirements corresponding to the transition point of the different break-make critical temperatures of photoswitch.
Referring to Fig. 2, for the mixed solution that volume ratio is toluene: ethanol=7:3, in the refractive index of 13 ℃ of left and right sides solution refractive indexes near quartzy background material, fibre core-the cladding index difference is 0 to index guide structure type photonic crystal fiber, does not satisfy the waveguide condition at this moment; In like manner, for the mixed solution that volume ratio is toluene: ethanol=8:2, about 39 ℃, do not satisfy the waveguide condition.
Referring to Fig. 3 a and Fig. 3 b, when toluene was 7:3 with the volumes of aqueous ethanol ratio, the photoswitch transmitance jumped to 0 by 1 in 16 ℃ of-14 ℃ of scopes, realize break-make transition; When toluene was 8:2 with the volumes of aqueous ethanol ratio, photoswitch jumped to 0 by 1 in 41 ℃ of-39 ℃ of scopes, realize break-make transition.
Referring to Fig. 4, through changing the volume ratio of ethanol in mixing material, jump in temperature scope that can the tuned light switch, thus produce the tunable optical switch.
A kind of light path control system referring to Fig. 5, comprising: photoswitch 1 and temperature control equipment 3; The mixed solution temperature that temperature control equipment 3 is regulated in the photoswitch 1; Single-mode fiber jumper 2 is coupled to through adapter or fusing mode in the two ends of photoswitch 1, and an end of single-mode fiber jumper 2 connects semiconductor laser light resource 4, and the other end connects power meter 5; The light signal that semiconductor laser light resource 4 sends is coupled to photoswitch 1 through single-mode fiber jumper 2, and power meter 5 is surveyed final output signal.
During concrete the realization, temperature control control device 3 is regulated the inner photoswitch 1 that is full of mixed solution, controls the loss of photoswitch 1 through thermal tuning, thereby realizes the break-make response of power meter 5 detected intensities.
Wherein, when specifically realizing, the preferred single-mode fiber jumper 2 of the embodiment of the invention is: the single-mode fiber jumper of 1550nm, corresponding, semiconductor laser light resource 4 is preferably: the semiconductor laser light resource of 1550nm.
In sum; The embodiment of the invention provides a kind of photoswitch and light path control system thereof; Through adopting the full light light path of photonic crystal fiber to replace traditional optical switch construction; Avoided MEMS control procedure and photoelectric conversion process, made that optical switch construction is simple, flexible design, do not need that opto-electronic conversion, with low cost and suitable industry spot or laboratory are on-the-spot uses flexibly; This kind photoswitch on-off temperature saltus step scope reaches 2 ℃, and through suitable regulator solution proportioning, can adjust photoswitch jump in temperature point, makes it have more application prospects; The temperature control control device is regulated the inner photoswitch that is full of mixed solution, and through the loss of thermal tuning control photoswitch, thereby the break-make that realizes the power meter detected intensity responds.
It will be appreciated by those skilled in the art that accompanying drawing is the synoptic diagram of a preferred embodiment, the invention described above embodiment sequence number is not represented the quality of embodiment just to description.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. a photoswitch is characterized in that, said photoswitch comprises: index guide structure type photonic crystal fiber, and the cladding diameter of said index guide structure type photonic crystal fiber is 125 microns, is made up of the airport of even triangle arrangement; The diameter of said airport is 6 microns, and spacing is 6.4 microns, totally 8 layers; The core region of said index guide structure type photonic crystal fiber is made up of the pure quartz of the two-layer airport of disappearance; In said covering, fill the mixed solution of toluene and ethanol,, control the waveguide of said index guide structure type photonic crystal fiber, realize the conversion of on-off through adjustment to said mixed solution; Through adjusting, select different temperatures transition point to said mixed solution proportioning.
2. a kind of photoswitch according to claim 1 is characterized in that, said mixed solution of in said covering, filling toluene and ethanol is specially:
Adopt mode that capillarity or vacuum take out pressure that the mixed solution of toluene and ethanol is filled in the covering of said index guide structure type photonic crystal fiber.
3. a light path control system is characterized in that, said light path control system comprises: photoswitch and temperature control equipment,
Said temperature control equipment is regulated the mixed solution temperature in the said photoswitch; Single-mode fiber jumper is coupled to through adapter or fusing mode in the two ends of said photoswitch; One end of said single-mode fiber jumper connects semiconductor laser light resource; The other end connects power meter, and the light signal that said semiconductor laser light resource sends is coupled to said photoswitch through said single-mode fiber jumper, and said power meter is surveyed final output signal.
4. a kind of light path control according to claim 3 system is characterized in that said single-mode fiber jumper is specially: the single-mode fiber jumper of 1550nm, correspondingly,
Said semiconductor laser light resource is specially: the semiconductor laser light resource of 1550nm.
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|---|---|---|---|
| CN2012101790535A CN102721997A (en) | 2012-06-01 | 2012-06-01 | Optical switch and optical path control system thereof |
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| CN2012101790535A CN102721997A (en) | 2012-06-01 | 2012-06-01 | Optical switch and optical path control system thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105629623A (en) * | 2015-06-24 | 2016-06-01 | 上海大学 | Tunable temperature bistable optical switch |
| CN113009724A (en) * | 2021-02-22 | 2021-06-22 | 安徽大学 | Wide-range multiband thermo-optic switch and manufacturing method thereof |
| CN113777699A (en) * | 2021-09-07 | 2021-12-10 | 北京航空航天大学 | Photonic crystal image transmission optical fiber and design method thereof |
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| US20050111804A1 (en) * | 2003-03-07 | 2005-05-26 | Anders Bjarklev | Composite material photonic crystal fibres, method of production and its use |
| US20050169590A1 (en) * | 2003-12-31 | 2005-08-04 | Crystal Fibre A/S | Liquid crystal infiltrated optical fibre, method of its production, and use thereof |
| CN101013182A (en) * | 2007-02-07 | 2007-08-08 | 南开大学 | Micro-structural optical fibre selectively filling method and judge aligning system |
| CN102288326A (en) * | 2011-07-07 | 2011-12-21 | 天津大学 | Method and sensor for measuring temperature of photonic crystal fiber (PCF) filled with mixed solution |
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| US20050111804A1 (en) * | 2003-03-07 | 2005-05-26 | Anders Bjarklev | Composite material photonic crystal fibres, method of production and its use |
| US20050169590A1 (en) * | 2003-12-31 | 2005-08-04 | Crystal Fibre A/S | Liquid crystal infiltrated optical fibre, method of its production, and use thereof |
| CN101013182A (en) * | 2007-02-07 | 2007-08-08 | 南开大学 | Micro-structural optical fibre selectively filling method and judge aligning system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105629623A (en) * | 2015-06-24 | 2016-06-01 | 上海大学 | Tunable temperature bistable optical switch |
| CN113009724A (en) * | 2021-02-22 | 2021-06-22 | 安徽大学 | Wide-range multiband thermo-optic switch and manufacturing method thereof |
| CN113009724B (en) * | 2021-02-22 | 2023-09-08 | 安徽大学 | Wide-range multiband thermo-optical switch and manufacturing method thereof |
| CN113777699A (en) * | 2021-09-07 | 2021-12-10 | 北京航空航天大学 | Photonic crystal image transmission optical fiber and design method thereof |
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Application publication date: 20121010 |