CN1434313A

CN1434313A - Method for working optical fibre microlens with center antomatic alignment function

Info

Publication number: CN1434313A
Application number: CN 02102717
Authority: CN
Inventors: 陈少武
Original assignee: Institute of Semiconductors of CAS
Current assignee: Institute of Semiconductors of CAS
Priority date: 2002-01-24
Filing date: 2002-01-24
Publication date: 2003-08-06
Anticipated expiration: 2022-01-24
Also published as: CN1177240C

Abstract

The invention is a processing method of fibre-optical micro-lens with central self-aligning function, the steps: (1) firstly make the fibre-optical through the central micro-hole of whirly clamp and clamp fast; (2) make the clamp rotate by the motor; (3) hang a plumb near one end of the fibre-optical and make the fibre-optical through the central micro-hole of the plumb and the fraction of the end out; (4) grind the end; (5) fix grinded fibre-optical on mobile clamp and place the end in the middle of two discharge electrodes, their points opposite; (6) preprocess the end by use of lower discharge intensity and shorter discharge time; (7) properly increase discharge intensity and time to make melt processing on the end and make the end become smooth curved surface by surface tension.

Description

Method for working optical fibre microlens with central self-aligning function

Technical field

The present invention relates to a kind of method for working optical fibre microlens of novelty, can make the lenticular optical axis of optic fibre end in process, keep autoregistration with the optical fiber central shaft.

Background technology

Fibre Optical Communication Technology is one of critical support technology of advanced information society.Usually the mould field of semiconductor laser is unmatched with the mould field of single-mode fiber, will cause very big luminous power coupling loss like this when semiconductor laser directly is coupled with single-mode fiber.Therefore,, improve the signal to noise ratio (S/N ratio) of light signal, just must manage to improve the coupling efficiency of semiconductor laser, make optically-coupled as much as possible advance optical fiber with optical fiber in order to prolong communication repeating length.A kind of effective solution is the lenticule of processing definite shape on the termination of optical fiber, lenticule makes the mould field of semiconductor laser mate mutually with the mould field of single-mode fiber, so just can obtain very high coupling efficiency (the report coupling efficiency being arranged up to 98% abroad).But problem is, the external diameter of general single mode fiber is 125 microns, and core diameter only is 8～9 microns, optical fiber for this little core diameter ratio, process lenticule with common optical fiber lapping technology at optic fibre end, be difficult to guarantee that lenticular optical axis coincides with the optical axis of single-mode fiber, so just cause the yield rate of optical fibre microlens processing very low.

Summary of the invention

The object of the present invention is to provide a kind of method for working optical fibre microlens with central self-aligning function, it can make the lenticular optical axis of optic fibre end keep autoregistration with the optical fiber central shaft in process, thereby the coupling efficiency of optical fiber is improved.

A kind of method for working optical fibre microlens with central self-aligning function of the present invention comprises: a whirly clamp, a muller and a buffing machine is characterized in that the step of its job operation is as follows:

Step 1: the center micropore and the clamping of at first optical fiber being passed whirly clamp are firm;

Step 2: the motor of rotation whirly clamp makes it and can rotate around its central shaft, thereby optical fiber is rotated thereupon by strap lug or gear driven whirly clamp;

Step 3: vertical downward for optical fiber is remained in rotary course, near the termination of optical fiber, be hung with a plummet, optical fiber passes the center micropore of plummet, make optic fibre end expose sub-fraction, and clamping is firm;

Step 4: utilize the mill rotation that is installed on the motor, the termination of optical fiber is ground, make optic fibre end form a plurality of round table surface;

Step 5: ground optical fiber is fixed on the mobile anchor clamps, the termination of optical fiber is placed the central part of the electrode of two relative discharges of two tips;

Step 6: utilize the lower strength of discharge of electrode and shorter discharge time that pre-service is carried out in the termination of optical fiber, destroy the molecule on the optical fiber;

Step 7: suitably add the strength of discharge and the discharge time of large electrode, melt process is carried out in the termination of optical fiber, under capillary effect, make optic fibre end become smooth surface.

Wherein mill is with the contact point place of optical fiber, and the velocity of mill is opposite with the velocity of optical fiber.

Wherein the processing sequence of round table surface both can be ascending according to the pitch angle, also can be descending according to the pitch angle.

Description of drawings

For further specifying content of the present invention, below in conjunction with drawings and Examples the present invention is done a detailed description, wherein:

Fig. 1 is the synoptic diagram of job operation of the present invention;

Fig. 2 is the partial enlarged drawing of Fig. 1, and display centre has an embodiment of the plummet of micropore;

Fig. 3 is one and has 4 round table surface, processing sequence according to the ascending embodiment in pitch angle.

Fig. 4 is the technological process synoptic diagram of flame polish method.

Embodiment

See also shown in Figure 1ly, the center micropore and the clamping of at first optical fiber 4 being passed whirly clamp 2 are firm.Electric rotating machine 3 drives whirly clamp 2 by strap lug 1, makes it to rotate around its central shaft, thereby optical fiber 4 is rotated thereupon.It is vertical downward for optical fiber 4 is remained in rotary course, be hung with a plummet 5 near the termination of optical fiber 4, optical fiber 4 passes the center micropore of plummet 5, makes optical fiber 4 terminations expose sub-fraction, and clamping firm (as shown in Figure 2, being an embodiment of this plummet).Like this, under the effect of gravity, optical fiber 4 remains vertical downwards also around its central shaft rotation in rotary course.The mill 6 that is used for grinding optical fiber 4 terminations is installed on the motor 7, and being increases grinding effect, and at the contact point place of mill 6 with optical fiber 4, the velocity of mill 6 is opposite with the velocity of optical fiber 4.The pitch angle of mill 6 can be set arbitrarily by angular adjustment dish 8.By the three-dimensional micropositioning stage 9 of XYZ, the locus of mobile mill 6 makes it to keep suitable contact with optical fiber 4, and this process can be carried out home position observation by viewing microscope 10.After the round platform grinding of a certain angle on optical fiber 4 terminations is finished, can continue to grind out the round table surface of another kind of angle by the pitch angle that angular adjustment dish 8 changes mills 6.Pitch angle by changing mill 6 n time just can go out the individual end to end round table surface of n in optical fiber 4 end machining in succession.The processing sequence of round table surface both can be ascending according to the pitch angle, also can be descending according to the pitch angle.

See also Fig. 3 again, 4 round table surface are arranged among Fig. 3, its processing sequence is according to the ascending embodiment in pitch angle.

After the angle of optical fiber 4 terminations was ground and finished, the surfaceness of abrasive surface was bigger, and the face deltoid of each round platform junction is also rough.In order to obtain the face shape of smooth enough lenticule surface and continuously smooth transition, can adopt following flame polish method that ground optic fibre end is handled.The technological process of flame polish method as shown in Figure 4, optical fiber 4 can be fixed on the three-dimensional micropositioning stage 14 of XYZ by fiber clamp 13, regulates micropositioning stage 14 and makes optical fiber 4 terminations be positioned at the central part of the relative sparking electrode 15 in two tips.Before formally carrying out flame polish, earlier with lower strength of discharge and short discharge time pre-service being carried out in optical fiber 4 terminations, purpose is by electric shock the abrasive surface of optical fiber 4 terminations to be carried out cleaning, destroys the fine particle that is attached on the abrasive surface.After having cleaned optical fiber, suitably set the intensity and the duration of electrical discharge arc more as required, abrasive surface to optical fiber 4 terminations carries out melt process, the fusion under the high temperature action that arc discharge forms of the quartz on abrasive surface top layer is the liquid quartzy of thickness, under capillary effect, original each round platform intersection can become smooth surface, and simultaneously, the surfaceness of abrasive surface is also improved greatly.Handle through this flame polish, just can be at optical fiber 4 terminations acquisition any surface finish, lenticule that face shape is level and smooth, and lenticular optical axis overlaps with fiber axis.

Claims

1, a kind of method for working optical fibre microlens with central self-aligning function comprises: a whirly clamp, a muller and a buffing machine is characterized in that the step of its job operation is as follows:

Step 6: that utilizes electrode carries out pre-service than low discharge intensity and shorter discharge time to the termination of optical fiber, destroys the molecule on the optical fiber;

2, the method for working optical fibre microlens with central self-aligning function according to claim 1 is characterized in that, wherein mill is with the contact point place of optical fiber, and the velocity of mill is opposite with the velocity of optical fiber.

3, the method for working optical fibre microlens with central self-aligning function according to claim 1 is characterized in that, wherein the processing sequence of round table surface both can be ascending according to the pitch angle, also can be descending according to the pitch angle.