CN115144966A - Floating wire comparison method for reducing optical fiber connection loss " - Google Patents
Floating wire comparison method for reducing optical fiber connection loss " Download PDFInfo
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2551—Splicing of light guides, e.g. by fusion or bonding using thermal methods, e.g. fusion welding by arc discharge, laser beam, plasma torch
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Abstract
The invention discloses a floating wire comparison method for reducing optical fiber connection loss, which comprises the following steps: the method comprises the following steps: preparing in advance; step two: testing preparation, namely measuring the length and the loss of the optical fiber through an optical time domain reflectometer; step three: adjusting welding parameters; step four: welding the optical fibers; step five; testing and comparing, if the testing parameters obtain the optimal parameter set, recording the optimal parameter set into an internal database of the fusion splicer as the most reference parameter set of the type of optical fiber, and if the testing parameters are not the optimal parameter set, repeating the third step; step six: adjusting the welding machine according to the value of the optimal parameter group and continuing welding; compared with the traditional connection mode, the method disclosed by the invention can adapt to the connection work of various optical cables of new models to the greatest extent, saves the cost of updating instruments such as a welding machine for adapting to the optical cables of the new models, and prolongs the service cycle of the welding machine of the old models.
Description
Technical Field
The invention relates to the field of optical fiber connection, in particular to a 'floating wire comparison method' for reducing optical fiber connection loss.
Background
With the continuous development of communication technology, new applications and new types of optical fibers are promoted to continuously appear, and the optical fibers made of new materials and with new structures are bound to cause new troubles for the welding of the traditional optical fibers. The new model updating speed of the optical cable fusion splicer cannot match the updating speed of a new optical cable, and the optical cable fusion splicer belongs to a more expensive splicing tool and cannot be frequently updated due to the appearance of a certain novel optical cable; adopt the novel optical cable of the full-automatic mode butt fusion of tradition, great loss can appear after continuing, the poor problem of optical signal transmission effect, consequently need reduce the method that optic fibre continues the loss and promote communication transmission quality through artifical on-the-spot adjustment parameter and solve.
Disclosure of Invention
The invention aims to provide a floating line comparison method for reducing optical fiber connection loss so as to solve the problem that the existing optical cable fusion splicer has poor fusion splicing effect on different optical cables.
In order to achieve the purpose, the invention provides the following technical scheme:
a floating wire comparison method for reducing optical fiber connection loss comprises the following steps:
the method comprises the following steps: preparing in advance;
step two: testing preparation, namely measuring the length and the loss of the optical fiber by an optical time domain reflectometer;
step three: adjusting welding parameters;
step four: optical fiber fusion welding;
step five; testing and comparing, if the testing parameters obtain the optimal group parameters, taking the optimal parameter group as the most reference parameter group of the optical fiber of the model number and inputting the most reference parameter group into an internal database of the fusion splicer, and if the testing parameters are not the optimal parameter group, repeating the third step;
step six: and adjusting the welding machine according to the value of the optimal parameter group and continuing welding.
Wherein, prepare in advance including:
(1) Cleaning the electrode bar, the camera reflector and the fiber discharge groove;
(2) Before the new electrode bar works, carrying out air discharge for 15-30 times;
(3) In a humid, cold and high altitude area, air discharge is carried out for 2-5 times before welding;
(4) Before the optical fiber splicing operation, the type and the composition material of an optical fiber to be spliced are inquired, the parameters of the environment temperature, the environment humidity and the altitude are detected, a central parameter is set as a reference point, and the parameter adjustment is carried out according to the actual fusion splicing condition;
(5) Before welding, removing oil, dust and moisture from the spliced optical fiber;
(6) Before welding, the lower gear set of the fiber releasing groove of the welding machine needs to be reset, the welding machine is restarted, and if the lower gear set of the fiber releasing groove of the welding machine is in a reset state, the welding machine does not need to be restarted.
When the optical time domain reflectometer is ready for testing, a real-time method needs to be selected as a testing mode of the optical time domain reflectometer, and the pulse width of the optical time domain reflectometer is selected to be more than 50 ns.
The testing method of the optical time domain reflectometer is an optical fiber connector testing method, which is also called a five-point testing method (a multipoint testing method, wherein brands may be different but the principle is the same), the five points comprise a point A, a point B, a point C, a point D and a point E, wherein the point A is an initial point and is positioned on an inclined line outside a blind area at the initial position, the point B and the point D are positioned on a loss inclined line close to the joint point, the point C is a joint central point, the point E is positioned on a far-end loss inclined line at the rear end of the joint, a section from the point A to the point B and a section from the point D to the point E mainly represent natural loss references (namely original attenuation values of the line) in an optical fiber line section, and the 4 points are positioned in relation to accurate values of optical fiber connector loss (part of brands are reduced to the 4 points by the OTDR testing method).
The fusion welding parameter adjustment comprises the step of adjusting the parameter values of the discharge intensity, the discharge time, the propulsion value, the discharge interval and the tensile strength of the fusion welding machine fusion optical fiber, and the fusion welding parameter adjustment obtains a floating loss curve according to a light joint testing method.
After the third step, the discharge intensity parameter value is too large or the propulsion value is not adjusted properly, so that when the joint is welded and discharged, the right floating loss curve rapidly rises, drops downwards after reaching the highest point, and stops suddenly, and after the joint is connected, the right floating loss curve is a positive loss value, and the process is carried out under the condition that:
(1) Reducing the discharge intensity, gradually reducing parameters, and performing optical fiber fusion test successively;
(2) And (3) comparing a plurality of groups of test curves with better welding results under the condition of carrying out the operation (1) for a plurality of times, and screening out the optimal parameter value by taking the change of the floating loss curve in the optical fiber splicing process as reference.
After the third step is carried out, the welding discharge time is too long, and the welding discharge time shows that when the connector discharges in the welding mode, the loss floating line slowly descends after the right floating loss curve ascends to a better position, so that the problem is solved, only the discharge time parameter needs to be reduced until the curve does not descend after ascending, then the discharge intensity fine adjustment and the test curve comparison are carried out for several times, and finally the optimal parameter value is obtained.
After the third step is carried out, when the joints are subjected to fusion welding and discharging, the right floating loss curve rises and stops when the ideal value is not reached, the situation comprises one or both of the situations of insufficient discharging time and insufficient discharging intensity, and the discharging time and the discharging intensity are independently or synchronously adjusted.
After the third step, when the joint welding discharge occurs, the right floating line rises to exceed the height of the normal welding curve, and the normal state is recovered after a transient gain loss value is formed, the welded data is excellent, the data is a numerical value close to 0 or a gain numerical value (negative loss), in this case, a far-end loop method is adopted, the positive average loss and the negative average loss of the test joint are compared, and the minimum average loss value is used as a specific optimal parameter value.
After the third step, a reflection peak appears in the middle of the central point of the joint after the joint welding discharge, which is an incomplete welding (false welding) phenomenon and needs to be welded again.
Compared with the prior art, the invention has the beneficial effects that:
compared with the traditional connection mode, the method disclosed by the application can adapt to the connection work of various optical cables of new models to the greatest extent, saves the cost of updating instruments such as a welding machine for adapting to the optical cables of the new models, increases the service cycle of the welding machine of the old models, and has better application improvement on various optical cables which are difficult to connect; the method has universality, can be adopted by various main line projects, optimization projects, transformation construction and the like, and has obvious quality improvement; the familiarity of constructors to the construction technology can be deepened, and further the working capacity is improved.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a five point step chart of the pre-fusion test of the present invention;
FIG. 3 is a five point step chart of the final test after fusion bonding of the present invention;
FIG. 4 is a graphical representation of a first instance of a fusion discharge of a joint in accordance with the present invention;
FIG. 5 is a graph illustrating a first instance of a welding discharge for a joint according to the present invention after welding;
FIG. 6 is a graph illustrating the adjusted welding discharges of the present invention during a first welding discharge condition;
FIG. 7 is a graphical representation of a second condition of a fusion discharge of a joint in accordance with the present invention;
FIG. 8 is a graphical representation of a joint of the present invention after fusion in a second instance of a fusion discharge;
FIG. 9 is a graph illustrating the adjusted welding discharge of the joint according to the second aspect of the present invention;
FIG. 10 is a graphical representation of a second instance of a fusion discharge for a joint in accordance with the present invention;
FIG. 11 is a graphical representation of a joint of the present invention after fusion in a second instance of a fusion discharge;
FIG. 12 is a graph illustrating the adjusted welding discharge of the joint according to the second aspect of the present invention;
FIG. 13 is a graphical representation of a second instance of a fusion discharge of a joint in accordance with the present invention;
FIG. 14 is a schematic view of a joint welding discharge of the present invention after welding in a second condition;
FIG. 15 is a graph illustrating adjusted welding discharges for a second aspect of a splice of the present invention;
FIG. 16 is a graphical representation of a second condition of a fusion discharge of a joint in accordance with the present invention;
FIG. 17 is a schematic view of a joint welding discharge of the present invention after welding;
FIG. 18 is a graph illustrating a second adjusted condition of a fusion discharge of a splice in accordance with the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution:
a floating wire comparison method for reducing optical fiber connection loss comprises the following steps:
the method comprises the following steps: the method comprises the steps of cleaning an electrode rod, a camera reflector and a fiber discharge groove, performing air discharge for 15-30 times before a new electrode rod works to achieve stable discharge efficiency, performing air discharge for 2-5 times before fusion splicing in humid, cold and high-altitude areas to ensure the drying and temperature in a fusion splicer and remove fine dust, improving the quality of fusion splicing, inquiring the model and the composition of optical fibers to be spliced before optical fiber connection operation, detecting the environmental temperature, humidity and altitude parameters, setting a central parameter as a reference point, manufacturing a simple central parameter point by parameter sets obtained after multiple discharge tests for operators with relatively poor experience, performing parameter adjustment according to actual fusion splicing conditions to reduce the number of experimental fusion splicing times and increase the efficiency of determining an optimal point, performing oil removal and dust removal on optical fiber connection before fusion splicing, performing necessary preparation work such as cleaning and dust removal on fusion splicers, selecting a place where dust can be avoided by drying as far as possible to improve the quality of the optical fibers, resetting a fusion splicer under the fiber discharge groove, resetting a gear set and resetting the fusion splicer without resetting the gear set, and restarting the fiber fusion splicer, and restarting the like.
Step two: when the optical fiber is tested and prepared, the length and the loss of the optical fiber are measured through an optical time domain reflectometer, a real-time method needs to be selected for a test mode of the optical time domain reflectometer, the pulse width of the optical time domain reflectometer is selected to be more than 50ns, and the problem that the obtained floating loss curve is inaccurate or the specific change situation is difficult to observe due to too small pulse width is solved;
step three: adjusting fusion parameters, wherein the adjustment of the fusion parameters comprises adjusting the parameter values of the discharge intensity, the discharge time, the propulsion value, the discharge interval and the tensile strength of the fusion fibers of the fusion splicer, and the adjustment of the fusion parameters obtains a floating loss curve according to a light joint test method;
step four: optical fiber fusion welding;
step five; testing and comparing, if the testing parameters obtain the optimal parameter set, recording the optimal parameters as the most reference parameter set of the optical fiber of the model into an internal database of the fusion splicer, and if the testing parameters are not the optimal parameters, repeating the third step;
step six: and adjusting the welding machine according to the value of the optimal parameter group and continuing welding.
Various problems occur during the welding in the third step, and the following solving methods are proposed according to different problems:
(1) Referring to fig. 4-6, after the third step, if the discharge intensity parameter value is too large or the propulsion value is not properly adjusted, the floating loss curve on the right side rapidly rises and drops down again after reaching the highest point, and then stops suddenly, and after finishing receiving, the value is a positive loss value, and in this case:
1. reducing the discharge intensity, gradually reducing the parameters, and performing the optical fiber fusion test again;
2. if the problems still occur under the operation of the step (1) for a plurality of times, comparing the welding curves for a plurality of times, and determining the optimal parameter value by referring to the change of the floating loss curve in the optical fiber splicing process;
(2) Referring to fig. 7-9, after step three, when the welding discharge time is too long, the right floating loss curve rises to the highest level and then slowly falls when the joint is subjected to welding discharge, in this case, the discharge time can be reduced until the curve does not fall after rising, and then the discharge intensity is adjusted and compared again until an optimal parameter value is obtained.
(3) Referring to fig. 10-12, after the third step, when the joint is subjected to welding discharge, the right floating loss curve rises and stops when the ideal value is not reached, which includes two cases of insufficient discharge time and insufficient discharge intensity or both, and the discharge time and the discharge intensity are adjusted separately or synchronously.
(4) Referring to fig. 13-16, after the third step, when the joint is welded and discharged, the right side floating line rises above the normal welding height, and returns to the normal state after a short gain loss value is formed, and the welded data is excellent, and the data is a value close to 0 or a gain value (negative loss), in this case, a far-end loop method is adopted, and the positive and negative average losses of the test joint are compared, and the minimum average loss value is a specific optimal parameter value.
(5) Referring to fig. 17-18, after step three, a reflection peak appears in the middle of the joint center point after the joint welding discharge, which is an incomplete welding (false welding) phenomenon and needs to be welded again.
In addition, due to the fact that different types of operators and operation optical fibers can also cause the optimized value of the method to change, and the method is used for carrying out fusion splicing operation on different types of light rays through different types of operation teams, it can be obtained that the operation team with only simple work experience is improved to the maximum when the self-splicing optical fibers under common types of optical fibers are fused, the operation team with strong work experience is optimized to the maximum when the general optical fibers under new materials of optical fibers are fused, and the operation team with strong work experience is optimized to the maximum when the self-splicing optical fibers under difficult types of optical fibers are fused.
Change table of the optimization values for different types of fibers under different conditions by the operation team:
it is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A floating wire comparison method for reducing optical fiber connection loss is characterized by comprising the following steps:
the method comprises the following steps: preparing in advance;
step two: testing preparation, namely measuring the length and the loss of the optical fiber by an optical time domain reflectometer;
step three: adjusting welding parameters;
step four: optical fiber fusion welding;
step five; testing and comparing, if the testing parameters obtain the optimal parameter set, taking the optimal parameter set as the most reference parameter set of the optical fiber of the model number and inputting the most reference parameter set into an internal database of the fusion splicer, and if the testing parameters are not the optimal parameter set, repeating the third step;
step six: and adjusting the welding machine according to the value of the optimal parameter group and continuing welding.
2. The method of claim 1, wherein the optical fiber splice loss is reduced by a "float mapping method", comprising:
the preparation in advance comprises the following steps:
(1) Cleaning the electrode bar, the camera reflector and the fiber discharge groove;
(2) Before the new electrode bar works, performing air discharge for 15-30 times;
(3) In a humid, cold and high-altitude area, air discharge is carried out for 2-5 times before welding;
(4) Before optical fiber splicing operation, the type and the composition material of an optical fiber to be spliced are inquired, the parameters of environment temperature, humidity and altitude are detected, a central parameter is set as a reference point, and parameter adjustment is carried out according to the actual fusion splicing condition;
(5) Before welding, removing oil, dust and moisture from the spliced optical fiber;
(6) Before welding, the lower gear set of the fiber releasing groove of the welding machine needs to be reset, the welding machine is restarted, and if the lower gear set of the fiber releasing groove of the welding machine is in a reset state, the welding machine does not need to be restarted.
3. The method of claim 1, wherein the optical fiber splice loss is reduced by a "float mapping method", comprising:
when the optical time domain reflectometer is ready for testing, a real-time method needs to be selected as a testing mode of the optical time domain reflectometer, and the pulse width of the optical time domain reflectometer is selected to be more than 50 ns.
4. The method of claim 3, wherein the optical fiber splice loss is reduced by a "float mapping method", comprising:
the optical time domain reflectometer testing method is an optical fiber connector testing method, and the optical fiber connector testing method is also called a five-point testing method (a multi-point testing method, wherein various brands may have differences, but the principle is the same), the five points comprise a point A, a point B, a point C, a point D and a point E, wherein the point A is an initial point and is positioned on an inclined line outside a blind area at the initial position, the point B and the point D are positioned on a loss inclined line close to the joint point, the point C is a joint central point, the point E is positioned on a far-end loss inclined line at the rear end of the joint, a section from the point A to the point B and a section from the point D to the point E mainly represent natural loss references (namely original attenuation values of the line) in an optical fiber line section, and the 4-point positioning relationship is related to the accurate value of the loss of the optical fiber connector (part of brands are reduced into the 4-point OTDR testing method).
5. The method of claim 4, wherein the optical fiber splice loss is reduced by a "floating-line comparison method", wherein:
the welding parameter adjustment comprises adjusting the parameter values of the discharge intensity, the discharge time, the propulsion value, the discharge interval and the tensile strength of the optical fiber welded by the welding machine, and the welding parameter adjustment is based on the change of a floating loss curve obtained by a light joint testing method.
6. The method of claim 5, wherein the optical fiber splice loss is reduced by a "float mapping method", comprising:
after the third step, if the discharge intensity parameter value is too large or the propulsion value is not adaptive, when the joint is subjected to fusion welding and discharging, the right floating loss curve rapidly rises, then drops downwards after reaching the highest point, and then stops suddenly, and after the joint is connected, the right floating loss curve is a positive loss value, and the process is carried out under the condition that:
(1) Reducing the discharge intensity, gradually reducing parameters, and performing optical fiber fusion test successively;
(2) If the above problems still occur under the operation of (1) for multiple times, comparing several groups of test curves with better welding results, and screening out the optimal parameter value by taking the change of the floating loss curve in the optical fiber splicing process as reference.
7. The method of claim 5, wherein the optical fiber splice loss is reduced by a "float mapping method", comprising:
and after the third step is carried out, the welding discharge time is too long, and the welding discharge time shows that the loss floating line slowly descends after the right floating loss curve ascends to a better position when the connector discharges in the welding process, so that the problem is solved, the discharge time parameter is only required to be reduced until the curve does not descend after ascending, then fine adjustment of discharge intensity is carried out for a plurality of times, the test curve is compared, and the optimal parameter value is finally obtained.
8. The method of claim 5, wherein the optical fiber splice loss is reduced by a "float mapping method", comprising:
after the third step, when the joint is subjected to fusion welding and discharging, the right floating loss curve rises and stops when the ideal value is not reached, the situation comprises one or both of the situations of insufficient discharging time and insufficient discharging intensity, and the discharging time and the discharging intensity are independently or synchronously adjusted.
9. The method of claim 5, wherein the optical fiber splice loss is reduced by a "float mapping method", comprising:
after the third step, when the joint is subjected to welding discharge, the right floating line rises to exceed the height of a normal welding curve to form a transient gain loss value, and then the normal state is recovered, the welded data is excellent, the data is a numerical value close to 0 or a gain numerical value (negative loss), in this case, a far-end loop method is adopted, the positive average loss and the negative average loss of the test joint are compared, and the minimum average loss value is taken as an optimal parameter value.
10. The method of claim 4, wherein the optical fiber splice loss is reduced by a "floating-line comparison method", wherein:
after the third step, after the joint welding discharge, a reflection peak appears in the middle of the joint center point, in this case, the incomplete welding (false welding) phenomenon needs to be welded again.
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