Composite glass optical fiber for synchronously detecting photoelectric signals and preparation method thereof
阅读说明：本技术 一种同步探测光电化信号的复合玻璃光纤及其制备方法 (Composite glass optical fiber for synchronously detecting photoelectric signals and preparation method thereof ) 是由 周时凤 戴毅 杜明辉 张伟达 蓝碧蛟 李佳熙 于 2019-10-15 设计创作，主要内容包括：本发明公开了一种同步探测光电化信号的复合玻璃光纤及其制备方法。该复合玻璃光纤,结构包括玻璃包层,导光玻璃纤芯,导电金属芯和贵金属微纳颗粒端面；其中导光玻璃光纤芯层位于光纤轴线处,导电金属芯位于导光玻璃芯与外包层中间区域。本发明可用于实现光信号、电信号和化学信号的高效传输与记录,这种复合玻璃光纤有望在神经科学、生物传感、环境监测等领域获得广泛应用。与目前的玻璃光纤和石英光纤对比,本发明的复合玻璃光纤具备光功能、电功能、化学探测功能,与聚合物光纤相比,本发明的复合玻璃光纤机械强度高,折射率分布均匀,光斑较小,透光性能良好。(The invention discloses a composite glass optical fiber for synchronously detecting photoelectric signals and a preparation method thereof. The composite glass fiber structurally comprises a glass cladding, a light guide glass fiber core, a conductive metal core and a noble metal micro-nano particle end face; the light guide glass optical fiber core layer is positioned at the axis of the optical fiber, and the conductive metal core is positioned in the middle area between the light guide glass core and the outer cladding layer. The composite glass fiber can be used for realizing the high-efficiency transmission and recording of optical signals, electric signals and chemical signals, and is expected to be widely applied in the fields of neuroscience, biosensing, environmental monitoring and the like. Compared with the existing glass fiber and quartz fiber, the composite glass fiber provided by the invention has the advantages of optical function, electric function and chemical detection function, and compared with polymer fiber, the composite glass fiber provided by the invention has the advantages of high mechanical strength, uniform refractive index distribution, small light spot and good light transmittance.)
1. A preparation method of a composite glass optical fiber for synchronously detecting photoelectrochemical signals is characterized by comprising the following steps:
preparing an optical fiber cladding (1), namely preparing a glass material into a cylindrical prefabricated rod; prefabricating a first cylindrical cavity in a cylindrical prefabricated rod, and prefabricating second cylindrical cavities on two sides of the first cylindrical cavity respectively to finish the preparation of the optical fiber cladding (1); the axis of the first cylindrical cavity is coaxial with the axis of the cylindrical preform rod; the axes of the second cylindrical cavities at two sides are parallel to the axis of the first cylindrical cavity; preparing a glass fiber core primary preform, namely preparing a cylindrical glass fiber core (2) from a glass fiber core material, wherein the diameter of the cylindrical glass fiber core is the same as that of a first cylindrical cavity in an optical fiber cladding (1); placing a cylindrical glass fiber core (2) in a first cylindrical cavity to obtain a primary prefabricated rod containing the glass fiber core; respectively placing metal materials serving as electrodes (3) into two second cylindrical cavities of the primary prefabricated rod, and then continuously drawing optical fibers in a wire drawing tower to obtain the photoelectric composite glass optical fiber; intercepting a section of photoelectric composite glass optical fiber, processing a rough structure surface (4) on one of the intercepted end surfaces, and plating a layer of noble metal nano particle layer on the rough structure surface (4) to obtain the multifunctional composite glass optical fiber device capable of detecting optical signals, electric signals and/or chemical signals.
2. The method for preparing the composite glass optical fiber for synchronously detecting the photoelectric signals according to claim 1, which is characterized in that: the rough structure surface (4) is in a stripe shape or a granular shape; the distance between the first cylindrical cavity and the second cylindrical cavity is 2-3 mm.
3. The method for preparing the composite glass optical fiber for synchronously detecting the photoelectric signals according to claim 2, wherein the method comprises the following steps: the continuous drawing of the optical fiber on the drawing tower means continuous drawing on the drawing tower at the temperature of 600-1800 ℃.
4. The method for preparing the composite glass optical fiber for synchronously detecting the photoelectric signals according to claim 3, wherein the method comprises the following steps: the depth of the first cylindrical cavity is less than or equal to the length of the cylindrical prefabricated rod, and the depth of the second cylindrical cavity is less than or equal to the length of the cylindrical prefabricated rod.
5. The method for preparing the composite glass optical fiber for synchronously detecting the photoelectric signals according to claim 4, wherein the method comprises the following steps: the refractive index of the glass fiber core is larger than that of the optical fiber cladding (1); the drawing temperature of the glass core material is less than or equal to that of the optical fiber cladding (1); the diameter of the composite glass optical fiber is 50 mu m-2 mm.
6. The method for preparing the composite glass optical fiber for synchronously detecting the photoelectric signals according to claim 5, wherein the method comprises the following steps: the optical fiber cladding (1) is made of K9 glass, phosphate glass, borosilicate glass or quartz glass.
7. The method for preparing the composite glass optical fiber for synchronously detecting the photoelectric signals according to claim 6, wherein the method comprises the following steps: the glass core material is ZF1 type glass, lithium boron glass, phosphate glass, borosilicate glass or multi-component glass.
8. The method for preparing the composite glass optical fiber for synchronously detecting the photoelectric signals according to claim 7, wherein the method comprises the following steps: the metal material of the electrode (3) is tungsten, molybdenum, platinum, gold, silver, aluminum, copper or iron; the metal material in the precious metal nano-particle layer is gold or silver.
9. The method for manufacturing a composite glass optical fiber for synchronously detecting an optoelectric signal according to claim 8, wherein: and the inner walls of the first cylindrical cavity and the second cylindrical cavity and the surface of the cylindrical glass fiber core (2) are polished.
10. The composite glass optical fiber for synchronous detection of an electro-optical signal obtained by the method for manufacturing a composite glass optical fiber according to claim 9, wherein the composite glass optical fiber is used as a detection device for optical signal, electrical signal and/or chemical signal detection.
Technical Field
The invention relates to the technical field of optical fiber material preparation, in particular to a composite glass optical fiber for synchronously detecting photoelectric signals and a preparation method thereof.
Background
The optical fiber material is widely applied to the fields of optical communication, optical fiber laser, nonlinear optics, chemical sensing, biomedicine, neuroscience and the like. With the development of society and the progress of material processing technology, the demand of optical fiber materials with multiple functions is also increasing. Therefore, integrating materials with optical, electrical, magnetic or chemical functions into one optical fiber to realize the multi-functionalization of a single optical fiber is an important direction for the development of optical fiber materials.
In optogenetic technology, optical fiber materials as one of the important devices have an important influence on the development of neuroscience. At present, the optical fiber commonly used in optogenetics is a commercial quartz optical fiber, the optical fiber can only guide light, and an electric signal generated by optical stimulation needs to be additionally implanted with an electrode material for recording, which increases the wound area of a living animal and the difficulty of operation. Therefore, it is urgently required to develop an optical fiber device capable of simultaneously conducting light and recording an electrical signal. Based on the above, the invention provides a preparation method of the composite glass fiber, and the obtained composite glass fiber not only can realize the functions of light guiding and electric conduction, but also has the function of chemical detection, and can synchronously detect the components and the concentration of substances. The composite glass fiber is expected to be widely applied in the fields of neuroscience, biosensing, environmental monitoring and the like.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art and provides a composite glass optical fiber for synchronously detecting photoelectric signals and a preparation method thereof. The composite glass optical fiber can simultaneously transmit optical signals, electric signals and chemical signals, and can be widely applied to the fields of neuroscience, biosensing, environmental monitoring and the like.
The invention is realized by the following technical scheme:
a preparation method of a composite glass optical fiber for synchronously detecting photoelectric signals comprises the following steps:
preparing an
The
The continuous drawing of the optical fiber on the drawing tower means continuous drawing on the drawing tower at the temperature of 600-1800 ℃.
The depth of the first cylindrical cavity is less than or equal to the length of the cylindrical prefabricated rod, and the depth of the second cylindrical cavity is less than or equal to the length of the cylindrical prefabricated rod.
The refractive index of the glass fiber core is larger than that of the
The
The glass core material is ZF1 type glass, lithium boron glass, phosphate glass, borosilicate glass or multi-component glass.
The metal material of the
And the inner walls of the first cylindrical cavity and the second cylindrical cavity and the surface of the cylindrical
The composite glass fiber can be used as a detection device for detecting optical signals, electrical signals and/or chemical signals.
Compared with the prior art, the invention has the following advantages and effects:
(1) the cladding and the fiber core materials used in the invention are glass materials, have small refractive index distribution difference and good light transmittance, and have good mechanical new energy and processability.
The noble metal nano particle layer is arranged on the same end face of the optical fiber, so that the device has the function of enhancing detection of Raman and infrared signals, and chemical signals such as components, concentration and the like of substances are transmitted.
(2) The electrode material in the composite glass optical fiber is a metal conductor electrode with excellent conductivity, and the traditional electrode material is an organic electrode or a semiconductor material with poor conductivity.
(3) The glass optical fiber device prepared by the invention can simultaneously realize synchronous and efficient transmission and recording of optical signals, electric signals and chemical signals, one optical fiber can simultaneously monitor the optical signals, the electric signals and the chemical signals, and effective integration of optical functions, electric functions and chemical functions is successfully realized.
(4) The invention can directly compound various metal materials into the glass optical fiber material, and the number of the metal electrodes is controllable, thereby obtaining the multi-metal electrode glass optical fiber.
(5) According to the multifunctional composite glass optical fiber provided by the invention, the size of the optical fiber can be controlled by adjusting the drawing process, and a large batch of glass optical fibers can be drawn by a high-temperature drawing tower.
(6) Compared with the existing glass fiber and quartz fiber, the composite glass fiber provided by the invention has the advantages of optical function, electric function and chemical detection function, and compared with polymer fiber, the composite glass fiber provided by the invention has the advantages of high mechanical strength, uniform refractive index distribution, small light spot and good light transmittance.
Drawings
FIG. 1 is a schematic view of a composite glass optical fiber structure for synchronous detection of photoelectric signals according to the present invention.
Detailed Description
As shown in fig. 1. The invention discloses a preparation method of a composite glass optical fiber for synchronously detecting photoelectric signals, which can be prepared by the following processes:
preparing an
The noble metal nano particle layer has unique surface plasma resonance characteristic and enhanced Raman scattering effect.
The
The continuous drawing of the optical fiber on the drawing tower means continuous drawing on the drawing tower at the temperature of 600-1800 ℃.
The depth of the first cylindrical cavity is less than or equal to the length of the cylindrical prefabricated rod, and the depth of the second cylindrical cavity is less than or equal to the length of the cylindrical prefabricated rod.
The refractive index of the glass fiber core is larger than that of the
The drawing temperature of the glass core material is less than or equal to that of the
The material of the
The glass core material is commercial ZF1 type glass (one of heavy flint glass), lithium boron glass, phosphate glass, borosilicate glass or multi-component glass.
The metal material of the
And the inner walls of the first cylindrical cavity and the second cylindrical cavity and the surface of the cylindrical
The composite glass fiber can be used as a detection device for detecting optical signals, electrical signals and/or chemical signals.
The invention is further described below by means of an embodiment:
(1) first, a glass rod of K9 having a diameter of 30mm and a length of 10cm was selected as a preform for the cladding of the optical fiber. A cylindrical cavity which is coaxial with the preform and has the diameter of 3mm and the depth of 6cm is processed in the preform to be used as a first cylindrical cavity; two cylindrical cavities with the diameter of 3mm and the depth of 6cm are processed on two sides of the first cylindrical cavity and serve as second cylindrical cavities. And polishing the first and second cylindrical cavity walls. The axis of the first cylindrical cavity is coaxial with the axis of the cylindrical preform rod; the axes of the second cylindrical cavities at two sides are parallel to the axis of the first cylindrical cavity; the first and second cylindrical cavities are spaced apart by a distance of about 2-3 mm.
(2) Taking a ZF1 glass rod with the diameter of 3m and the length of 6cm as a glass core material, polishing the surface of the glass core material, and placing the glass core material in the first cylindrical cavity.
(3) Filling a tungsten filament into the second cylindrical cavity, and continuously drawing the optical fiber on a wire drawing tower at 930-960 ℃ to obtain the photoelectric composite glass optical fiber; the end face structure of the photoelectric composite glass optical fiber is shown in figure 1, and it can be known from the figure that the optical fiber structure is intact, and the electrode material is well compounded into the glass optical fiber.
(4) Intercepting (about 5cm) a section of the photoelectric composite glass optical fiber prepared in the step (3), processing rough stripes on one end face of the photoelectric composite glass optical fiber (the other end face is not processed), and plating a layer of gold or silver nanoparticles on the end face of the optical fiber with the stripes to obtain the multifunctional glass optical fiber device capable of simultaneously detecting optical signals, electric signals and chemical signals.
As described above, the present invention can be preferably realized.
The embodiments of the present invention are not limited to the above-described embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and they are included in the scope of the present invention.
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