CN103969744A - Discharging strength correction method of optical fiber fusion splicer - Google Patents

Abstract

The invention discloses a discharging strength correction method of an optical fiber fusion splicer and belongs to the technical field of photoelectron and information communication. A method that discharging strength is measured and calculated through two times of discharging of an electrode is used, end faces of two optical fibers are enabled to be flat and clean through first-time discharging, and more proper electrode discharging strength can be measured through second-time discharging. The discharging strength correction method is simple in operation, accurate in discharging strength correction, low in optical fiber connector fusion splicing loss and especially suitable for on-site construction and outdoor environment.

Description

A kind of strength of discharge bearing calibration of optical fiber splicer

Technical field

The present invention is the strength of discharge bearing calibration of optical fiber splicer in the time of welding optic fibre, belongs to photoelectron and ICT (information and communication technology) field.

Background technology

Optical Fiber Transmission has transmission frequency bandwidth, message capacity is large, loss is low, be not subject to electromagnetic interference (EMI), the advantage such as lightweight, thereby the application of optical fiber is more and more extensive, but light can produce loss while transmitting in optical fiber, this loss is mainly made up of the loss of optical fiber self and the connecting loss at fibre-optical splice place.The method of fibre junction has multiple, and while wherein using optical fiber splicer welding optic fibre with welding, the connecting loss of joint is minimum.When fused fiber splice, joint has splice loss, splice attenuation, and splice loss, splice attenuation is excessive not only causes large economic loss, also can cause fibre-optical splice transmission quality and reduce.The excessive reason of fibre-optical splice splice loss, splice attenuation has multiple, as: fiber end face cut quality is poor, and heat sealing machine strength of discharge is too high or too low, all can cause fibre-optical splice splice loss, splice attenuation bigger than normal.Fibre-optical splice splice loss, splice attenuation and electrode discharge strength relationship are shown in accompanying drawing 1.In theory, the optical fiber splicer of every kind of model has the optimum strength of discharge of the minimum fiber optic splicing loss of correspondence of a recommendation, and this suitable strength of discharge represents with the axial hot melt retraction distance (critical field D) after two fused fiber splices on optical fiber splicer.In actual use, external environment is changed fused fiber splice quality is had to impact as temperature, air pressure (height above sea level), latitude, position, optical fiber kind, electrode, and therefore, staff needs the required most suitable strength of discharge of on-the-spot test fused fiber splice.

The method of proofreading and correct at present optical fiber splicer strength of discharge has following several.One is as follows, specifically sees accompanying drawing 2.

1, by two optical fiber 10 isoplanars with clad but disalignment place, and record D0, as shown in Figure 2 A;

2, set a discharge current x, and under this discharge current above-mentioned two optical fiber 10 of welding, and make two optical fiber after welding have certain axialy offset, and record D1, as Fig. 2 B;

3, set different discharge current x, repeating step 2 records different optical fiber axialy offset Dn, as Fig. 2 C and Fig. 2 D at every turn;

4, for strength of discharge (y), formula (Dn-Dn+1)/Dn represents, calculates the strength of discharge y that each discharge current (x) is corresponding, can obtain function y=f (x).

Can draw the corresponding discharge current of the minimum splice loss, splice attenuation of fibre-optical splice by our rule.

The corresponding discharge current of the minimum splice loss, splice attenuation of fibre-optical splice going out in order to upper method gained, very accurate, but method is loaded down with trivial details, is especially not suitable for field work.

Introduce the bearing calibration of another kind of optical fiber splicer strength of discharge below.

On optical fiber splicer, two optical fiber isoplanars are coaxially fixing, as shown in Figure 3, record two optical fiber, 10 end distance L1, when optical fiber 10 is fixing, opening discharge switch makes electrode high-frequency discharge cause optical fiber 10 heating and meltings again, after optical fiber 10 is cooling, record two spacing L2 between optical fiber, two fiber end faces are because capillary effect is shunk back, therefore spacing L2 is greater than L1, the changing value of secondary arm spacing is the comparison of the given critical field D of (L2-L1) (being also hot melt retraction distance) and optical fiber splicer, can be used to detect and correcting electrode strength of discharge.

This method is due to the out-of-flatness of Fig. 3 A fiber end face in the time cutting, and on be inevitably attached with impurity, and fiber end face impurity and end face out-of-flatness all can cause fiber optic splicing loss and increase, therefore, the strength of discharge corresponding with the minimum splice loss, splice attenuation of fibre-optical splice can not be detected by the method.

Good fiber end face just can make joint have low-loss.The unsmooth for example end face of fiber end face speckles with dirt with the protruding sphere of wedge shaped tip, end face, scarce broken and end face serrate and the end face of end face, also can increase the splice loss, splice attenuation of fibre-optical splice.

Summary of the invention

The object of this invention is to provide a kind of strength of discharge bearing calibration of easy and simple to handle, the accurate optical fiber splicer of effect.

Implementation method of the present invention is, proofreaies and correct strength of discharge with optical fiber splicer by the method for arc discharge, and concrete steps are for comprising:

A, fix two optical fiber and make its coaxial placed adjacent respectively;

B, two optical fiber abutting ends are applied to electric discharge simultaneously, cause two optical fiber abutting end hot melts;

C, above-mentioned fused optic fiber head is continued to apply electric discharge, its strength of discharge causes two cooled axial hot melt amount of recovery of optical fiber head and is positioned at the critical field that heat sealing machine is given, just obtains the strength of discharge in a calibration cycle.

The bearing calibration of a kind of optical fiber splicer strength of discharge of the present invention, owing to having taked secondary hf electric arc electric discharge type of heating, electric discharge for the first time adopts more low intensive high-frequency discharge, make fiber end face slightly smooth, its objective is that revising fiber end face angle reduces fiber end face impurity, make two fiber end faces more smooth cleaner, thereby heat and find suitable strength of discharge that better condition is provided for discharging for the second time; Putting for the second time electrically heated object is to record suitable strength of discharge.The present invention is extremely easy, does not need loaded down with trivial details measurement and calculation, the electrode discharge intensity can more accurately detect the minimum splice loss, splice attenuation of fibre-optical splice time.The present invention is especially applicable to field work, for optical fiber splicer uses the method that better correction strength of discharge is provided in the wild.The present invention improves the welding quality of fibre-optical splice with short-cut method, have larger economic benefit and important practical significance.

Brief description of the drawings

Fig. 1 is the relation of fibre-optical splice splice loss, splice attenuation and electrode discharge intensity;

Fig. 2 is US Patent No. 6,294, the embodiment of 760B1;

Fig. 3 is one of optical fiber splicer strength of discharge bearing calibration;

Fig. 4 is this patent embodiment;

Fig. 5 is this patent effluve calibration process flow diagram;

Fig. 6 is the theory diagram that this patent effluve is proofreaied and correct.

Embodiment

Strip out one section of bare fibre with optical fiber wire-stripping pliers, cleaned totally with alcohol swab, then use optical fiber cutter cutting optical fibre, now, optical fiber tangent plane is generally irregular.After optical fiber cuts, then by two optical fiber 10 isoplanars and coaxially put into the optical fiber placement unit 7 of optical fiber splicer, fix optical fiber with fiber clamp, recording two spacing between optical fiber 10 end faces is L1, as Fig. 4 A.Main control unit 1, according to air pressure acquiring unit 5, temperature acquiring unit 6, regulates effluve unit 2 discharge capacity sizes through discharge electricity amount control module 4; Electrode 21 in effluve unit 2 imposes high frequency to two optical fiber 10 end faces and discharges for the first time, and strength of discharge should make fiber end face slightly smooth, and to revise fiber end face angle and to remove fiber end face impurity, discharge process approximately continues 500ms, as Fig. 4 B.After optic fibre end electric discharge melting is cooling again, recording two optical fiber 10 end distances is L2, as Fig. 4 C.Because fiber end face is molten molten and removed foreign material, fiber end face is cleaner and more smooth.

Keep optical fiber fixed position, main control unit regulates effluve unit 2 discharge capacity sizes through discharge electricity amount control module 4 again; Electrode 21 in effluve unit 2 applies effluve for the second time to optical fiber 10 end faces, discharge process continues about 1000ms, now optical fiber 10 end faces are molten molten, optical fiber 10 end faces have become circular arc under capillary effect, and image acquisition unit 8 obtains fiber end face information (as Fig. 4 D L3) and is input to optical fiber hot melt retraction metrics calculation unit 9; After calculating optical fiber hot melt retraction distance value (being L3-L2), optical fiber hot melt retraction metrics calculation unit 9 is input to critical field comparing unit 12; Critical field comparing unit 12 draws correction data and is input to correction result store unit 3 and is input to correction result display unit 11 again.Show data fit alignment requirements if proofread and correct result display unit 11, hot melt retraction distance value L3-L2 is positioned at the given critical field D of heat sealing machine, finishes to proofread and correct, and strength of discharge for the second time is now desirable strength of discharge.If do not meet alignment requirements, reappose two new optical fiber to placement unit 7, main control unit 1 is according to air pressure acquiring unit 5, temperature acquiring unit 6 and proofread and correct result store unit 3 information, again regulate effluve unit 2 discharge capacity sizes through discharge electricity amount control module 4, and repeat above-mentioned steps, until hot melt retraction distance value L3-L2 is positioned at the given critical field D of heat sealing machine.

Conventionally carry out 2-3 time and proofread and correct, can reach desirable calibration result, without repeatedly proofreading and correct.

Optimum or reference: pre-arcing amount be for the first time for the second time discharge capacity 60%.

In theory, strength of discharge when fiber end face becomes semicircle spheroid is optimal strength of discharge.

Claims (2)

1. a strength of discharge bearing calibration for optical fiber splicer, is characterized in that, proofreaies and correct strength of discharge with optical fiber splicer by the method for arc discharge, comprising:

A, fix two optical fiber and make its coaxial placed adjacent respectively;

B, two optical fiber abutting ends are applied to electric discharge simultaneously, cause two optical fiber abutting end hot melts smooth;

C, above-mentioned fused optic fiber head is continued to apply electric discharge, its strength of discharge causes two cooled axial hot melt amount of recovery of optical fiber head and is positioned at the critical field that heat sealing machine is given, just obtains the strength of discharge in a calibration cycle.

2. the strength of discharge bearing calibration of optical fiber splicer as claimed in claim 1, is characterized in that, also comprises:

Fixing before two optical fiber first by smooth two fiber cut.