CN109827678A - A kind of temperature sensor and preparation method thereof that conversion fluorescence is luminous - Google Patents
A kind of temperature sensor and preparation method thereof that conversion fluorescence is luminous Download PDFInfo
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- CN109827678A CN109827678A CN201910194766.0A CN201910194766A CN109827678A CN 109827678 A CN109827678 A CN 109827678A CN 201910194766 A CN201910194766 A CN 201910194766A CN 109827678 A CN109827678 A CN 109827678A
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Abstract
The present invention is the temperature sensor and preparation method thereof that a kind of conversion fluorescence shines, belong to solid state laser field, the structure of sensor is the hollow special optical fiber-multimode fibre-single mode optical fiber structure of single mode optical fiber-three core of multimode fibre-suspension, specifically includes single mode optical fiber, multimode fibre, the hollow special optical fiber of three cores of suspension, erbium and ytterbium codoping tellurate glass microballoon；Erbium and ytterbium codoping tellurate glass microballoon is built in the suspension hollow special optical fiber of three cores, forms cone waist by fused biconical taper in the middle part of the hollow special optical fiber of three cores of suspension.Present invention utilizes inside hollow optic fiber, there are the structural advantages of airport, and microballoon is naturally encapsulated in inside of optical fibre, realize microballoon resonator without other operations and excite in the coupling of inside of optical fibre；The special optical fiber built-in-gain microballoon photonic integrated device prepared using this method is realized stronger up-conversion fluorescence and shone, while showing good temperature sensing performance under the excitation of pump light.
Description
Technical field
The invention belongs to solid fiber field of lasers, and in particular to a kind of luminous temperature sensor of conversion fluorescence and its
Production method.
Background technique
In recent years, rare earth ion doped luminescent material is very popular, because it has photoluminescence property and potential
Application value.It is pumped by the near-infrared laser of high-energy, near-infrared may be implemented in the glass host material of doping with rare-earth ions
To up-conversion luminescence that can be light-exposed, and can be applied to Three-dimensional Display, laser optical fiber amplifier and fluorescence refrigeration etc. it is multiple
Field.Wherein blue green light and based on the white light of Red Green Blue high density data storage, life science, laser doctor
There are many application values in the fields such as treatment, Three-dimensional Display.By rare earth doped glass matrix up-conversion luminescence, have it is low in cost,
Easy to operate, the advantages that being easily integrated.Therefore it explores and new rare earth material and its physics, chemistry and optical characteristics is adulterated in research,
It obtains high efficiency, low-loss material, has great importance.In a variety of applications of rare earth doped material, upper conversion is glimmering
Light luminance temperature sensor plays an important role.This kind of optical sensor has benefited from the luminescence mechanism of thermal coupling energy level to carry out temperature
The characterization of sensing characteristics is spent, obtained result is theoretically only monotonically correlated with temperature, and measurement is convenient and easy, to condition depended
Small, mechanism theory is mature, and sensing is sensitive, thus has obtained extensive research.But most of researchs be all by glass preparation at
Bulk is tested, and required exciting power is larger, limits the further hair of this kind of optical sensor to a certain extent
Exhibition and application.
Currently, the optical resonator of Whispering-gallery-mode has attracted the broad interest of researcher, by means of microcavity quality factor
The feature high, mode volume is small, energy density is high, using the technology of preparing of multicomponent glass microcavity, by rare earth glass material
It is combined with Whispering-gallery-mode microcavity, increases substantially the luminous efficiency of rare earth doped material, transfer efficiency.Whispering-gallery-mode
Optical resonator refer to light wave is played local humidification and frequency selection index system on room and time optics member
Device.Restriction effect in time is characterized with quality factor, and volume characterizes in mode for local effect spatially.Its
In paid close attention to the Microsphere Cavities of high-quality-factor by people, in nonlinear optics, optical communication technique, microsensor, chamber quantum
Each basis such as electrodynamics and microlaser has a wide range of applications with application field.Utilize tapered fiber and Microsphere Cavities
Coupled system substantially increases excitation optical power density, improves luminous efficiency, electronic in quantum optices, micro sensing, chamber quantum
There has been extensive theory and application research in the fields such as mechanics, micro laser, are that one of research nonlinear optical phenomena is fine
Platform, many research achievements are also reported in succession.
However, cone optical fiber-microballoon coupled system, due to its influence vulnerable to environmental factors such as ambient temperatures, and structure
The disadvantages of itself can not working under high temperature environment after being encapsulated with ultraviolet glue, it is difficult to adapt to miniature integrated opto-electronic device
Demand for development.Up to the present, there are no the relevant reports that coupling excitation rare-earth doping gain microballoon is realized in inside of optical fibre.Such as
Fruit can prepare the integrated device of this optical fiber built-in gain microballoon, be bound in fields such as optical sensor, microlasers
To being widely applied.
Summary of the invention
In order to fill up the research blank of optical fiber built-in gain microballoon photonic integrated device, it is an object of the invention to design one
Kind can be with the optical fiber structure of built-in-gain microballoon, and can successfully couple excitation microballoon, realizes that fluorescence even laser exports, structure
Compact, preparation is simple, overcomes cone optical fiber-microballoon coupled system disadvantage easily affected by environment, the integrated device prepared exists
Good sensing capabilities are shown in terms of temperature sensing, open new way for the application of rear-earth-doped light emitting materials of glass
Diameter.
The object of the present invention is achieved like this:
A kind of temperature sensor that conversion fluorescence is luminous, the structure of sensor are single mode optical fiber-three core of multimode fibre-suspension
Hollow special optical fiber-multimode fibre-single mode optical fiber structure specifically includes single mode optical fiber, multimode fibre, the suspension hollow special type of three cores
Optical fiber, erbium and ytterbium codoping tellurate glass microballoon；The erbium and ytterbium codoping tellurate glass microballoon is built in the suspension hollow spy of three cores
In kind optical fiber, passes through fused biconical taper in the middle part of the hollow special optical fiber of three cores of suspension and form cone waist.
The erbium and ytterbium codoping tellurate glass microballoon constituent is as follows:
72TeO2-20ZnO-5Na2CO3-1.5Y2O3-0.5Er2O3-1Yb2O3。
A kind of production method for the temperature sensor that conversion fluorescence is luminous, specifically comprises the following steps:
(1) it establishes gain microballoon and couples excitation theory model in inside of optical fibre, design and make special optical fiber；
(2) preparing one kind can be coupled with the optical fiber structure of built-in-gain microballoon and be excited built-in microballoon；
(3) multicomponent glass is prepared, and high quality factor gain glass microballoon is made in glass；
(4) microballoon is placed in inside of optical fibre, completes encapsulation；
(5) luminescent properties for testing gain microballoon, characterize thermometer sensor DS18B20.
The step (1) specifically includes:
When the parameters such as the optical fibre refractivity and core diameter of the special optical fiber are optical fiber evanescent field coupling efficiency maximum
Optical fiber parameter.
The step (2) specifically includes:
The hollow special optical fiber structure of single mode optical fiber-three core of multimode fibre-suspension is welded, wherein multimode fibre length is 2mm,
Hanging the hollow special optical fiber length of three cores is 0.5mm；Hollow optical fiber is drawn and is bored, cone waist diameter is 30 μm.
The step (3) specifically includes:
(3.1) multicomponent glass formula is 72TeO2-20ZnO-5Na2CO3-1.5Y2O3-0.5Er2O3-1Yb2O3By component
Formula weighs high-purity powder shape raw material 20g, is sufficiently mixed in the agate mortar uniformly；
(3.2) uniformly mixed material is poured into 200ml corundum crucible, is melted in Muffle furnace at 900 DEG C
Then 30min pours into glass melt in the stainless steel mould of preheating, anneal 3 hours, be then slowly cooled to room temperature；
(3.3) tellurate glass prepared is clayed into power, and at thinner powder and makes it by 300 mesh mesh screens
It spreads out；
Powder is poured into the electric furnace for being connected with High Purity Nitrogen, 800 DEG C of temperature setting, 2L/min is arranged in gas flow rate, in electric furnace
It places the culture dish equipped with deionized water and collects microballoon in bottom；
Air valve is closed after (3.4) 30 seconds, with the deionized water evaporation in culture dish, microballoon is transferred on glass slide, and
Microballoon pattern is observed under the microscope.
The step (4) specifically includes:
(4.1) cone platform is drawn to draw single mode optical fiber using optical fiber, cone waist diameter is 30 μm, and is cut in centre, is made half
Tapered fiber；
(4.2) the hollow special optical fiber structure of single mode optical fiber-three core of multimode fibre-suspension that will be welded in step (4.1)
It is placed on three-dimensional regulation platform, and fixed with fiber clamp；
(4.3) the erbium and ytterbium codoping tellurate microballoon prepared in step (3) is adsorbed on optical fiber front end with half tapered fiber,
It is placed on another three-dimensional regulation platform, and is fixed with fiber clamp；
(4.4) under microscopical observation, three-dimensional platform is adjusted, microballoon is placed on inside hollow optic fiber；
(4.5) by the hollow optical fiber other end of built-in microballoon and multimode fibre-single mode optical fiber structure welding, it is prepared into single mode
Hollow special optical fiber-multimode fibre-single mode optical fiber the structure of optical fiber-three core of multimode fibre-suspension completes encapsulation.
The beneficial effects of the present invention are: (1) with bore optical fiber-microballoon coupled system compared with, present invention utilizes hollow lights
There are the structural advantages of airport for fine inside, and microballoon is naturally encapsulated in inside of optical fibre, is realized without other operations
Microballoon resonator is excited in the coupling of inside of optical fibre.This integrated photonic device, compact-sized, preparation is simple, is not easily susceptible to
The influence of external environment is used to prepare optical sensor, microlaser with development potential and prospect.(2) this method is used
It is glimmering to realize stronger upper conversion under the excitation of pump light for the special optical fiber built-in-gain microballoon photonic integrated device of preparation
Light shine, compared with traditional rear-earth-doped glass material, luminous efficiency, in terms of all improve a lot,
Good temperature sensing performance is shown, the various fields such as climate monitoring, biomedicine, industrial production are expected to be used for.
Detailed description of the invention
Fig. 1 (a) is that the preparation method of erbium and ytterbium codoping tellurate glass microballoon of the invention illustrates schematic diagram；It (b) is this hair
The glass microsphere microscope photo figure of prepared size rule in bright example；It (c) is glass microsphere resonance built in hollow optical fiber
The structural schematic diagram of device；
Fig. 2 is to hang erbium and ytterbium codoping tellurate glass microballoon resonance built in the hollow special optical fiber of three cores in the embodiment of the present invention
The luminous temperature sensor test result figure of device up-conversion fluorescence: curve graph (a) is varied with temperature for fluorescence intensity ratio FIR；(b)
It is luminous intensity and temperature with wavelength change curve graph.
Specific embodiment
In order to make the purpose of the present invention, technology, advantage and practical value be readily apparent from understanding, below in conjunction with attached drawing and specifically
The present invention will be described in detail for embodiment.
As shown in Fig. 1 (c), the structure for the temperature sensor that the conversion fluorescence in the present invention shines is single mode optical fiber-multimode
Hollow special optical fiber-multimode fibre-single mode optical fiber the structure of three core of optical fiber-suspension specifically includes single mode optical fiber, multimode fibre, hangs
Hang the hollow special optical fiber of three cores, erbium and ytterbium codoping tellurate glass microballoon；Erbium and ytterbium codoping tellurate glass microballoon is built in suspension three
In the hollow special optical fiber of core, cone waist is formed by fused biconical taper in the middle part of the hollow special optical fiber of three cores of suspension.
The production method of the luminous temperature sensor of conversion fluorescence, specifically comprises the following steps:
(1) it establishes gain microballoon and couples excitation theory model in inside of optical fibre, design and make special optical fiber；
(2) preparing one kind can be coupled with the optical fiber structure of built-in-gain microballoon and be excited built-in microballoon；
(3) multicomponent glass is prepared, and high quality factor gain glass microballoon is made in glass；
(4) microballoon is placed in inside of optical fibre, completes encapsulation；
(5) luminescent properties for testing gain microballoon, characterize thermometer sensor DS18B20.
It is described in detail below by the structure and production method of the embodiment temperature sensor luminous to conversion fluorescence:
Step 1: design hollow optical fiber
The suspension hollow special optical fiber model of three cores is established using COMSOL and Multiphysics software, carries out mode point
Analysis；Change the parameters such as optical fibre refractivity, core diameter, comparing its evanscent field size etc. influences the index of coupling effect, obtains most
Good parameter.Customize optical fiber.
Step 2: preparing the optical fiber structure of built-in-gain microballoon
The hollow special optical fiber structure of single mode optical fiber-three core of multimode fibre-suspension is welded, wherein multimode fibre length is 2mm,
Hanging the hollow special optical fiber length of three cores is 0.5mm；Hollow optical fiber is drawn and is bored, cone waist diameter is 30 μm.
Step 3: preparing erbium and ytterbium codoping tellurate glass microballoon according to step shown in Fig. 1 (a)
Multicomponent glass formula: 72TeO2-20ZnO-5Na2CO3-1.5Y2O3-0.5Er2O3-1Yb2O3；By a group distribution
Side weighs high-purity powder shape raw material 20g, is sufficiently mixed in the agate mortar uniformly.It is rigid that uniformly mixed material is poured into 200ml
In beautiful crucible, 30min is melted in Muffle furnace at 900 DEG C.Then glass melt is poured into the stainless steel mould of preheating, is moved back
Fiery 3h, is then slowly cooled to room temperature, to reduce residualinternal stress.The tellurate glass prepared is clayed into power, and is passed through
300 mesh mesh screens are at thinner powder and it is made to spread out.Powder is poured into the electric furnace for being connected with High Purity Nitrogen, temperature setting
800 DEG C, 2L/min is arranged in gas flow rate, places the culture dish equipped with deionized water in furnace bottom and collects microballoon.It is closed after 30s
Microballoon is transferred on glass slide, and observe microballoon pattern under the microscope by air valve with the deionized water evaporation in culture dish.
Fig. 1 (b), which is shown in embodiment, prepares obtained microballoon microscope photo figure.
Step 4: microballoon being placed in inside of optical fibre and forms the structure as shown in Fig. 1 (c).
Cone platform is drawn to draw single mode optical fiber using optical fiber, cone waist diameter is 30 μm, and is cut in centre, and half cone light is made
It is fine.The hollow special optical fiber structure of single mode optical fiber-three core of multimode fibre-suspension that step 2 is welded is placed on three-dimensional regulation to put down
On platform, and fixed with fiber clamp.It is adsorbed on optical fiber front end with the microballoon that half tapered fiber prepares step 3, is placed on another
On one three-dimensional regulation platform, and fixed with fiber clamp.Under microscopical observation, three-dimensional platform is adjusted, microballoon is placed
In inside hollow optic fiber.By the hollow optical fiber other end of built-in microballoon and multimode fibre-single mode optical fiber structure welding, it is prepared into list
Hollow special optical fiber-multimode fibre-single mode optical fiber the structure of mode fiber-three core of multimode fibre-suspension completes encapsulation.
Step 5: carrying out temperature sensing experiment
By the hollow special optical fiber-multimode fibre-single mode optical fiber of single mode optical fiber-three core of multimode fibre-suspension of built-in microballoon
Structure is placed on intelligent temperature console, and is fixed with glass slide.A detector is fixed above the position for placing microballoon,
And detector is connected into micro spectral analyzer, acquisition data are analyzed by computer software, monitor luminescent spectrum.
At room temperature, it is passed through 980nm pumping laser, is constantly adjusted to laser output power with stepping 50mW from 50mW
500mW observes and records microballoon green light Up-conversion Intensity with the situation of change of pump power.Fixed pump power is 350mW,
Thermal station is adjusted, 110 DEG C is risen to from 30 DEG C with 20 DEG C of stepping, observes and records green light Up-conversion Intensity and compare variation with temperature
Situation.Fig. 2 show temperature sensing experimental data curve, and wherein Fig. 2 (a) is that fluorescence intensity ratio FIR varies with temperature curve graph；
It (b) is luminous intensity and temperature with wavelength change curve graph, it can be seen that the temperature sensor in embodiment is linearly spent preferably.
It should be understood by those skilled in the art that the above embodiments are only used to help understand method of the invention
Technology and core concept are not intended to limit the present invention, meanwhile, according to the thought of the application, in specific embodiment and application range
Upper there will be changes, these changes are both fallen in protection scope of the present invention.The foregoing is merely preferred realities of the invention
Example is applied, is not intended to restrict the invention, for those skilled in the art, the present invention can have various changes and change
Change.All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in the present invention
Protection scope within.
Claims (7)
1. a kind of luminous temperature sensor of conversion fluorescence, the structure of sensor is in single mode optical fiber-three core of multimode fibre-suspension
Empty special optical fiber-multimode fibre-single mode optical fiber structure specifically includes single mode optical fiber, multimode fibre, the suspension hollow special light of three cores
Fine, erbium and ytterbium codoping tellurate glass microballoon；The erbium and ytterbium codoping tellurate glass microballoon is built in the suspension hollow special type of three cores
In optical fiber, cone waist is formed by fused biconical taper in the middle part of the hollow special optical fiber of three cores of suspension.
2. a kind of luminous temperature sensor of conversion fluorescence according to claim 1, which is characterized in that the erbium ytterbium is total
Mixing tellurate glass microballoon constituent is 72TeO2-20ZnO-5Na2CO3-1.5Y2O3-0.5Er2O3-1Yb2O3。
3. a kind of production method of the luminous temperature sensor of conversion fluorescence, specifically comprises the following steps:
(1) it establishes gain microballoon and couples excitation theory model in inside of optical fibre, design and make special optical fiber；
(2) preparing one kind can be coupled with the optical fiber structure of built-in-gain microballoon and be excited built-in microballoon；
(3) multicomponent glass is prepared, and high quality factor gain glass microballoon is made in glass；
(4) microballoon is placed in inside of optical fibre, completes encapsulation；
(5) luminescent properties for testing gain microballoon, characterize thermometer sensor DS18B20.
4. a kind of production method of the luminous temperature sensor of conversion fluorescence according to claim 3, which is characterized in that institute
The step of stating (1) specifically includes:
The light when parameters such as the optical fibre refractivity and core diameter of the special optical fiber are optical fiber evanescent field coupling efficiency maximum
Fine parameter.
5. a kind of production method of the luminous temperature sensor of conversion fluorescence according to claim 3, which is characterized in that institute
The step of stating (2) specifically includes:
The hollow special optical fiber structure of single mode optical fiber-three core of multimode fibre-suspension is welded, wherein multimode fibre length is 2mm, suspension
The hollow special optical fiber length of three cores is 0.5mm；Hollow optical fiber is drawn and is bored, cone waist diameter is 30 μm.
6. a kind of production method of the luminous temperature sensor of conversion fluorescence according to claim 3, which is characterized in that institute
The step of stating (3) specifically includes:
(3.1) multicomponent glass formula is 72TeO2-20ZnO-5Na2CO3-1.5Y2O3-0.5Er2O3-1Yb2O3By component formula
High-purity powder shape raw material 20g is weighed, is sufficiently mixed in the agate mortar uniformly；
(3.2) uniformly mixed material is poured into 200ml corundum crucible, melts 30min in Muffle furnace at 900 DEG C, so
Glass melt is poured into the stainless steel mould of preheating afterwards, anneals 3 hours, is then slowly cooled to room temperature；
(3.3) tellurate glass prepared is clayed into power, and at thinner powder and makes its dispersion by 300 mesh mesh screens
It comes；Powder is poured into the electric furnace for being connected with High Purity Nitrogen, 800 DEG C of temperature setting, 2L/min is arranged in gas flow rate, in furnace bottom
It places the culture dish equipped with deionized water and collects microballoon；
Air valve is closed after (3.4) 30 seconds, with the deionized water evaporation in culture dish, microballoon is transferred on glass slide, and aobvious
Micro- microscopic observation microballoon pattern.
7. a kind of production method of the luminous temperature sensor of conversion fluorescence according to claim 3, which is characterized in that institute
The step of stating (4) specifically includes:
(4.1) cone platform is drawn to draw single mode optical fiber using optical fiber, cone waist diameter is 30 μm, and is cut in centre, and half cone is made
Optical fiber；
(4.2) the hollow special optical fiber structure of single mode optical fiber-three core of multimode fibre-suspension being welded in step (4.1) is placed
It is fixed on three-dimensional regulation platform, and with fiber clamp；
(4.3) the erbium and ytterbium codoping tellurate microballoon prepared in step (3) is adsorbed on optical fiber front end with half tapered fiber, placed
On another three-dimensional regulation platform, and fixed with fiber clamp；
(4.4) under microscopical observation, three-dimensional platform is adjusted, microballoon is placed on inside hollow optic fiber；
(4.5) by the hollow optical fiber other end of built-in microballoon and multimode fibre-single mode optical fiber structure welding, single-mode optics are prepared into
Hollow special optical fiber-multimode fibre-single mode optical fiber the structure of fibre-three core of multimode fibre-suspension completes encapsulation.
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