CN111020539A - Method for preparing optical fiber cladding light filter based on chemical Ni-P plating method - Google Patents

Method for preparing optical fiber cladding light filter based on chemical Ni-P plating method Download PDF

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CN111020539A
CN111020539A CN201911192666.0A CN201911192666A CN111020539A CN 111020539 A CN111020539 A CN 111020539A CN 201911192666 A CN201911192666 A CN 201911192666A CN 111020539 A CN111020539 A CN 111020539A
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optical fiber
light filter
cladding light
plating
solution
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CN111020539B (en
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胡振峰
宋启良
梁秀兵
孔令超
金国
刘二宝
涂龙
崔辛
陈永雄
罗晓亮
王浩旭
胡海韵
王荣
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National Defense Technology Innovation Institute PLA Academy of Military Science
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National Defense Technology Innovation Institute PLA Academy of Military Science
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/31—Coating with metals
    • C23C18/32—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron
    • C23C18/34—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron using reducing agents
    • C23C18/36—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron using reducing agents using hypophosphites
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/18—Pretreatment of the material to be coated
    • C23C18/1851—Pretreatment of the material to be coated of surfaces of non-metallic or semiconducting in organic material
    • C23C18/1872—Pretreatment of the material to be coated of surfaces of non-metallic or semiconducting in organic material by chemical pretreatment
    • C23C18/1886—Multistep pretreatment
    • C23C18/1893—Multistep pretreatment with use of organic or inorganic compounds other than metals, first
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067—Fibre lasers

Abstract

The invention provides a method for preparing an optical fiber cladding light filter based on a chemical Ni-P plating method. And preparing a metal Ni-P coating on the surface of the optical fiber with the coating removed by utilizing a chemical Ni-P plating technology. The main components of the chemical Ni-P plating solution comprise 8-10g of citric acid, 20-30ml of lactic acid, 25-30g of nickel sulfate, 25-30g of sodium hypophosphite, a proper amount of stabilizer, 6-8g of sodium acetate and 10-12g of succinic acid. The metal Ni-P coating prepared by the method has good quality and is uniformly deposited on the surface of the optical fiber with the coating removed. Since the metal Ni-P is a good conductor in nature. Therefore, the method provided by the invention overcomes the problem that the traditional cladding light filter burns due to the fact that a large amount of cladding light leaks to quickly raise the local temperature, so that the overall temperature distribution of the cladding light filter is uniform, the cladding light can be uniformly stripped, and the cladding light filter has higher corrosion resistance and hardness.

Description

Method for preparing optical fiber cladding light filter based on chemical Ni-P plating method
Technical Field
The invention belongs to the technical field of laser, relates to a method for preparing an optical fiber cladding light filter, and particularly relates to a method for preparing the optical fiber cladding light filter based on a chemical Ni-P plating method.
Background
With the wide application of laser technology in the industrial field, the power of the laser is also increasing. Meanwhile, higher requirements are put on the beam quality of the laser and the stability of the system. For a high-power output fiber laser, an overlong gain fiber cannot be prepared due to a nonlinear effect, so that a part of pump light is remained in an inner cladding of the fiber, and the power of the remained pump light is increased along with the increase of the output power of the laser; meanwhile, due to the welding and bending of the optical fiber and other reasons, part of signal light can leak to the inner cladding of the optical fiber, and if the residual light is transmitted inside the optical fiber, the monochromaticity and the beam quality of output light can be influenced, even optical devices are damaged, and output equipment is damaged. Therefore, the method filters residual light inside the optical fiber, and has important significance for the innovation of optical fiber high-power devices. In the production and manufacture of the laser, an optical fiber cladding light filter is required to be connected at the tail end of an optical path and used for stripping a small part of residual pump light and high-order mode laser inside the optical fiber, so that the beam quality is optimized.
At present, the conventional method for stripping the cladding light mainly comprises the step of coating a layer of high-refractive-index glue on the optical fiber with the exposed inner cladding, wherein the principle is that the refractive index of the coated light-guide glue is greater than that of the inner cladding, so that the total reflection condition between the inner cladding and the outer cladding of the optical fiber is damaged, and the residual light of the inner cladding is leaked out. In practical application, when the optical power of the filter prepared by the method is high, the phenomena of overhigh temperature, burning loss and the like occur on the light guide glue on the surface of the optical fiber cladding. Some researchers use hydrofluoric acid to strip the cladding light by stage etching, however, in application, due to the change of the cladding structure, a large amount of light leaks from the front end of the filter, and a hot spot is formed locally, which makes it difficult to stably filter the cladding light, and greatly limits the improvement of the performance of the cladding light filter. Meanwhile, when the filter under special industrial and mining environments is applied, the damage of the external environment is also a problem to be solved.
Therefore, an effective method for preparing the optical fiber cladding light filter is a problem to be solved.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a method for preparing an optical fiber cladding light filter based on an electroless Ni-P plating method.
The invention also aims to provide the optical fiber cladding light filter prepared by the method.
In order to achieve the purpose, the invention provides a method for preparing an optical fiber cladding light filter based on an electroless Ni-P plating method, which comprises the following steps:
s1: removing a coating layer: taking an optical fiber with core, inner cladding, outer cladding and coating, soaking a section of the optical fiber with a middle part length of 20-50cm in acetone for 15min, taking out, and adding concentrated H2SO4Soaking for 1min to remove coating layer, and then soaking with concentration of 95% alcohol is used for cleaning for 5min to obtain a section of optical fiber with a coating removed;
the coating layer is made of organic components such as epoxy resin, polyurethane or alkylene oxide resin, and can be oxidized by a strong oxidant to remove the organic coating layer on the surface of the optical fiber, acetone, sulfuric acid and the like. The inner cladding and the outer cladding are made of the same material as the fiber core and have different refractive indexes from the fiber core, so that the fiber is not afraid of corrosion of strong oxidizing agents.
S2: oil removal of the optical fiber: soaking the section of optical fiber with the coating removed in 40g/L NaOH solution for 15min, removing oil and dirt, finally cleaning for 1 time by using 95% alcohol, and blow-drying for later use;
s3: preparing a sensitizing solution and an activating solution, heating the sensitizing solution to 25 ℃, and heating the activating solution to 35 ℃;
s4: sensitization and activation of optical fiber: placing the coated optical fiber section subjected to oil removal into a prepared sensitizing solution, soaking for 15min at a constant temperature of 25 ℃, taking out, and placing into an activating solution, and soaking for 15min at a constant temperature of 35 ℃;
s5: preparing a chemical Ni-P plating solution:
firstly, weighing 8-10g of citric acid, 20-30ml of lactic acid, 25-30g of nickel sulfate and 25-30g of sodium hypophosphite, and respectively dissolving in 125ml of deionized water; respectively dissolving 1.0-2.0mg of thiourea, 1.5-3.5mg of potassium iodate, 6-8g of sodium acetate and 10-12g of succinic acid in 50ml of deionized water to prepare solutions with single components;
then, mixing the single components according to the sequence, stirring at a speed of 220r/min until the components are uniformly mixed, adding 40g/L of sodium hydroxide solution to adjust the pH value to 4.6, and fixing the volume of deionized water to 1L to prepare chemical plating Ni-P liquid;
in the chemical plating Ni-P solution, citric acid and lactic acid are used as complexing agents, nickel sulfate is used as main salt, sodium hypophosphite is used as reducing agents, thiourea and potassium iodate are used as stabilizing agents, sodium acetate and succinic acid are used as accelerating agents, and the components are added in a strict sequence in preparation to obtain qualified chemical plating Ni-P solution, otherwise, the stability of the chemical plating Ni-P solution is poor, and a qualified Ni-P coating cannot be prepared.
S6: Ni-P plating: taking the section of the optical fiber with the coating removed after activation out of the activation solution, putting the section of the optical fiber into a chemical Ni-P plating solution which is preheated to 75 ℃, and keeping the constant temperature of 75 ℃ for plating for 1 hour; then the optical fiber is taken out and cleaned for 1 time by alcohol with the concentration of 95 percent to prepare the optical fiber cladding light filter.
Further, in the S3, the sensitizing solution component is SnCl215g/L, 37% HCl 30ml/L and activating solution component PdCl20.5g/L, 37% HCl 5 ml/L.
The invention also provides the optical fiber cladding light filter prepared by the method.
The coating layer of the traditional optical fiber mainly comprises organic matters, has the advantages of perfectly protecting the optical fiber and higher flexibility, and the optical fiber can be bent within a certain range, but has the defects of no high temperature resistance, no corrosion resistance and easy burning loss when the temperature rises.
The method for preparing the optical fiber cladding light filter based on the chemical plating Ni-P method provided by the invention utilizes the chemical plating technology to prepare the metal Ni-P plating layer on the surface of the optical fiber with the coating layer removed, and the Ni-P metal is a good conductor in the nature and has a high melting point, so that the requirement of bearing the high-temperature environment work is met; meanwhile, the coating layer is removed to destroy the total reflection condition between the inner cladding and the outer cladding of the optical fiber, so that the prepared optical fiber cladding light filter can uniformly strip cladding light, the phenomenon that the local temperature is rapidly raised due to the fact that a large amount of cladding light at the front end leaks is avoided, and the effect of uniform overall temperature of the filter is achieved.
The optical fiber cladding light filter provided by the invention removes a section of coating layer in the double-cladding optical fiber, then is plated with Ni-P metal, and the region outside the coating layer is still in a common double-cladding optical fiber structure.
The invention optimizes the chemical plating Ni-P process, removes the coarsening step before the traditional chemical plating and reduces the damage to the optical fiber matrix.
But due to the metal coating and SiO2The flexible of (2) is poor, so the flexible can not be bent in a large range and is easy to break. In the application of the optical fiber cladding light filter, compared with the length of a few meters to a few hundred meters of a common optical fiber, the proportion of the optical fiber cladding light filter is small, namely, an overlong metal-coated optical fiber is not required, so long as the metal-coated optical fiber is usedThe optical fiber with the metal coating is kept in a straightening state.
The invention has the beneficial effects that:
according to the method for preparing the optical fiber cladding light filter, the Ni-P metal coating layer of the prepared optical fiber cladding light filter is uniformly distributed by adopting a method for chemically plating Ni-P metal, the coating layer quality is good, coarsening is not generated in the plating process, and the optical fiber with the coating layer removed is not damaged. The optical fiber cladding light filter prepared by the method overcomes the defects of uneven temperature and over-high working temperature of the traditional cladding light filter, which causes the burning-out of materials. Meanwhile, the prepared cladding light filter can uniformly strip cladding light, improves the stability and reliability of the filter, and overcomes the problem that the original organic coating layer can be burnt or fall off in a high-temperature environment to influence the function of the optical fiber, because the chemical plating metal Ni-P coating (the melting point of the nickel-phosphorus alloy is 850 ℃) and the SiO (the core and the inner and outer claddings) of the optical fiber substrate2The melting points of the optical fiber cladding light filter are all higher than 850 ℃, so that the optical fiber cladding light filter can bear higher power emitted by a pump laser light source, and the service life of the optical fiber cladding light filter is prolonged. Meanwhile, the optical fiber cladding light filter chemically plated with Ni-P metal prepared by the invention has good corrosion resistance and higher hardness value, and can obviously prolong the service life of the cladding light filter in special working condition environments such as corrosive environments (such as sea surface moist and humid environments, weak acid environments or corrosive gas-containing environments) and scratching environments (such as scratching in the installation process or friction and scratching of internal parts after installation) and the like, thereby overcoming the problems of non-corrosion resistance, easy weathering and the like of high folding glue on the surface of the traditional optical filter.
Drawings
FIG. 1 is a flow chart of the electroless Ni-P plating process provided by the invention.
FIG. 2 is a schematic structural diagram of a cladding light filter according to the present invention.
FIG. 3 is a diagram of a fiber cladding light filter detection device.
FIG. 4 is a schematic diagram of fiber cladding light filter rejection.
FIG. 5 is a schematic diagram of the detection of the temperature of the fiber cladding light filter.
FIG. 6 is a graph of infrared thermal imaging of the surface of a fiber cladding light filter.
FIG. 7 is a graph of the fiber cladding light filter polarization removal
FIG. 8 is a graph of the elastic modulus of an optical fiber cladding light filter
FIG. 9 is a graph showing the hardness distribution of the optical fiber cladding light filter
Reference numerals
1: an optical fiber; 2: a coating layer; 3: removing the coated optical fiber; 4: and (4) Ni-P plating.
Detailed Description
The following detailed and complete description of the embodiments of the present invention is provided to enable those skilled in the art to more easily understand the advantages and features of the present invention, and to clearly and clearly define the scope of the present invention.
The invention uses 37% HCl as mass concentration, 95% alcohol as mass concentration,
the detection device is provided with: the device comprises a speed synthesizer, an infrared thermal imager, a 200W LD pumping light source and a power meter.
Example 1
The optical fiber cladding light filter is prepared according to the process flow shown in fig. 1, and the specific steps are as follows:
s1, taking an optical fiber with the length of 2m, soaking a section with the length of 20cm in the middle part of the optical fiber for 15min by using acetone, taking out the optical fiber and then using concentrated H2SO4Soaking for 1min to remove the coating, and cleaning with 95% ethanol for 5min to obtain a section of optical fiber with coating removed;
s2: oil removal of the optical fiber: soaking the section of optical fiber with the coating removed in 40g/L NaOH solution for 15min, removing oil and dirt, finally cleaning for 1 time by using 95% alcohol, and blow-drying for later use;
s3, preparing a sensitizing solution and an activating solution, wherein the sensitizing solution comprises SnCl215g/L, 37% HCl 30ml/L, and the activating solution component is PdCl20.5g/L and 37% HCl 5ml/L, heating the sensitizing solution to 25 ℃, and heating the activating solution to 35 ℃;
s4, optical fiber sensitization and activation: placing the coated optical fiber section subjected to oil removal into a prepared sensitizing solution, soaking for 15min at a constant temperature of 25 ℃, taking out, and placing into an activating solution, and soaking for 15min at a constant temperature of 35 ℃;
the optical fiber with the coating removed mainly comprises SiO2The surface is an inactive inert surface and has no condition for spontaneously generating chemical reaction. Sensitization is to adsorb a layer of stannous ion with oxidation ability on the surface of the optical fiber to provide a reducing agent for activation. The purpose of the activation is to have the capability of catalyzing and reducing the metal atoms to be plated on the surface of the substrate. The sensitizing agent is oxidized in the activation process, and the activating agent is reduced to form a metal crystal nucleus with catalytic capability and adsorbed on the surface of the optical fiber.
S5, preparing chemical plating Ni-P liquid,
firstly, weighing 10g of citric acid, 30ml of lactic acid, 30g of nickel sulfate and 30g of sodium hypophosphite, respectively dissolving the citric acid, the lactic acid, the nickel sulfate and the sodium hypophosphite in 125ml of deionized water, and respectively dissolving 1.6mg of thiourea, 2.8mg of potassium iodate, 8g of sodium acetate and 12g of succinic acid in 50ml of deionized water; preparing a solution of each single component; then, the single components are mixed according to the sequence, stirred at the speed of 220r/min until the components are uniformly mixed, added with 40g/L sodium hydroxide solution to adjust the pH value to 4.6, and the deionized water is added to the volume of 1L to prepare the chemical plating Ni-P liquid.
S6, Ni-P plating: taking the section of the optical fiber with the coating removed after activation out of the activation solution, putting the section of the optical fiber into a chemical Ni-P plating solution which is preheated to 75 ℃, and keeping the constant temperature of 75 ℃ for plating for 1 hour; then the optical fiber is taken out and cleaned for 1 time by alcohol with the concentration of 95 percent to prepare the optical fiber cladding light filter.
The resulting fiber cladding light filter structure is shown in FIG. 2. It can be seen from fig. 2 that both ends of the optical fiber cladding light filter are original double-clad optical fibers 1, the outermost layer of the optical fiber 1 is a coating layer 2, the middle section is a coating-removed optical fiber 3, and a layer of Ni-P metal 4 is plated outside the coating-removed optical fiber 3.
The optical fiber cladding light filter provided by the invention is characterized in that a coating layer of one section of a double-cladding optical fiber is removed and then plated with Ni-P metal, and the region except the coating layer is still in a common double-cladding optical fiber structure.
Example 2 Performance testing of optical fiber cladding light Filter
The optical fiber with the optical fiber cladding light filter prepared in example 1 was connected to a 200W LD pump light source and a 7 × 1 beam combiner apparatus as shown in fig. 3, and the laser output power after the treatment of the optical fiber cladding light filter was measured using a 300W power meter. Laser generated by the LD in the test process is coupled by the beam combiner device, enters the optical fiber with the optical fiber cladding light filter, and finally enters the power meter. Monitoring the surface temperature of the chemical Ni-P plated optical fiber by an infrared thermal imager in the test process, recording the passing power of the chemical Ni-P plated optical fiber when the surface temperature is 100 ℃ in the test selection, and calculating the passing rate of the pumping light of the chemical Ni-P plated optical fiber. And judging the effect of the optical fiber cladding light filter according to the infrared thermal imaging graph and the passing rate. Fig. 4 is a schematic diagram of the filtering of the pump light passing through the fiber cladding light filter, and it can be seen that the pump light is filtered step by step as the number of reflections increases. FIG. 5 shows the heat distribution of the pump light inside the electroless Ni-P plated fiber. The principle of the analysis light filtering is that as the metal Ni-P alloy material belongs to a good conductor, when pump laser enters the optical fiber cladding light filter and is reflected at the interface of the metal layer and the quartz layer, part of energy in the pump laser enters the metal in the form of evanescent waves and is dissipated, and the surface temperature can be measured by using an infrared thermal imager. Although the pump light entering the Ni-P alloy coating raises the temperature of the metal Ni-P alloy, the temperature is far lower than the melting point of the Ni-P alloy coating (the melting point of the Ni-P alloy coating is 850 ℃), so that the Ni-P alloy coating cannot be damaged, the defect that the traditional optical fiber cladding light filter is easy to burn is further overcome, and the metal coating optical fiber can be used in the optical fiber cladding light filter due to the characteristic.
Fig. 6 is an actual measurement result of the optical fiber cladding light filter prepared in embodiment 1 of the present invention by using an infrared thermal imager, and it can be seen that when the surface has a Ni — P plating layer, the surface temperature is uniformly distributed, and the temperature is about 24.8 ℃, which is significantly lower than the highest point 101.8 ℃ measured by using the infrared thermal imager.
The corrosion resistance of the optical fiber cladding light filter is detected by adopting a CS350H electrochemical workstation, the corrosion environment takes 3.5 wt.% NaCl solution as a corrosion medium, the results of the measured self-corrosion potential and self-corrosion current density are shown in FIG. 7, and can be obtained from FIG. 7Corrosion potential EcorrAt-0.32373 mV, self-etching current density icorrIs-6.94078 μ Α · cm-2. The elastic modulus measured by a Nano Test 600 type multifunctional nanoindenter is shown in figure 8, the hardness is shown in figure 9, and the elastic modulus and the average hardness are shown in table 1:
TABLE 1 elastic modulus and average hardness value of optical fiber cladding light filter
Figure BDA0002293959720000061
Wherein the average hardness is an average of four points.
From table 1, it can be seen that the Ni-P coated optical fiber has good corrosion resistance and higher hardness value.
It can be seen from the foregoing embodiments that, the fiber cladding light filter prepared by the method of chemically plating Ni-P metal according to the present invention can uniformly strip cladding light, and improves the stability and reliability of the filter.

Claims (3)

1. A method for preparing an optical fiber cladding light filter based on a chemical Ni-P plating method is characterized by comprising the following steps: the method comprises the following steps:
s1: removing a coating layer: taking an optical fiber with core, inner cladding, outer cladding and coating, soaking a section of the optical fiber with a middle part length of 20-50cm in acetone for 15min, taking out, and adding concentrated H2SO4Soaking for 1min to remove the coating, and cleaning with 95% ethanol for 5min to obtain a section of optical fiber with coating removed;
s2: oil removal of the optical fiber: soaking the section of optical fiber with the coating removed in 30-40g/L NaOH solution for 15min, removing oil and dirt, finally cleaning for 1 time by using deionized water, and blow-drying for later use;
s3: preparing a sensitizing solution and an activating solution, heating the sensitizing solution to 25 ℃, and heating the activating solution to 35 ℃;
s4: sensitization and activation of optical fiber: placing the coated optical fiber section subjected to oil removal into a prepared sensitizing solution, soaking for 15min at a constant temperature of 25 ℃, taking out, and placing into an activating solution, and soaking for 15min at a constant temperature of 35 ℃;
s5: preparing a chemical Ni-P plating solution:
firstly, weighing 8-10g of citric acid, 20-30ml of lactic acid, 25-30g of nickel sulfate and 25-30g of sodium hypophosphite, respectively dissolving the citric acid, the lactic acid, the nickel sulfate and the sodium hypophosphite in 125ml of deionized water, respectively dissolving 1.0-2.0mg of thiourea, 1.5-3.5mg of potassium iodate, 6-8g of sodium acetate and 10-12g of succinic acid in 50ml of deionized water; preparing single component solutions;
then, mixing the single-component solutions according to the sequence, stirring at a speed of 220r/min until the single-component solutions are uniformly mixed, adding 40g/L of sodium hydroxide solution to adjust the pH value to 4.6, and fixing the volume of deionized water to 1L to prepare chemical plating Ni-P liquid;
s6: Ni-P plating: taking the section of the optical fiber with the coating removed after activation out of the activation solution, putting the section of the optical fiber into a chemical Ni-P plating solution which is preheated to 75 ℃, and keeping the constant temperature of 75 ℃ for plating for 1 hour; then the optical fiber is taken out and cleaned for 1 time by alcohol with the concentration of 95 percent to prepare the optical fiber cladding light filter.
2. The method for preparing the optical fiber cladding light filter based on the electroless Ni-P plating method according to claim 1, wherein in S3, the component of the sensitizing solution is SnCl215g/L, 37% HCl 30ml/L and activating solution component PdCl20.5g/L, 37% HCl 5 ml/L.
3. The optical fiber cladding light filter prepared by the method for preparing the optical fiber cladding light filter based on the electroless Ni-P plating method according to claim 1 or 2.
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CN104880764A (en) * 2015-05-26 2015-09-02 大族激光科技产业集团股份有限公司 Method of removing cladding light, optical fiber and manufacturing method thereof

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CN1827848A (en) * 2006-04-05 2006-09-06 南昌大学 Process for coarsening-free chemical plating of nickel-phosphor alloy on optical fiber surface and chemical plating solution thereof
CN101348905A (en) * 2008-09-04 2009-01-21 南昌航空大学 Middle-temperature acidic electroless nickel plating-phosphor alloy formula
KR20140013180A (en) * 2012-07-20 2014-02-05 주식회사 마이크로테크 Electroless plating method of optical fiber
CN103269010A (en) * 2013-05-10 2013-08-28 上海飞博激光科技有限公司 Cladding light filtering structure and manufacturing method thereof
CN104880764A (en) * 2015-05-26 2015-09-02 大族激光科技产业集团股份有限公司 Method of removing cladding light, optical fiber and manufacturing method thereof

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