A production process for producing bell-mouth optical fiber capillary

Abstract

The present invention relates to the technical field of optical fiber capillaries, and discloses a production process for producing trumpet-mouth optical fiber capillaries, comprising the following steps: step S1, taking an optical fiber capillary for multi-point clamping; step S2, introducing an inert gas into the micropores of the optical fiber capillary, and making the air pressure in the micropores greater than the standard atmospheric pressure; step S3, using a heating device to heat multiple heating tube sections of the optical fiber capillary at the same time; step S4, after bubbles are formed in the heating tube sections; step S5, cutting the optical fiber capillary at the bubbles. The present invention has the following advantages and effects: the present invention introduces an inert gas into the micropores of the optical fiber capillary and heats the heating tube sections of the optical fiber capillary, the optical fiber capillary does not rotate, the heating device rotates, omitting the flattening or stretching steps, and directly using a self-rotating roller to adhere excess softened glass, and can simultaneously realize the molding of multiple bubble structures. Compared with the hot blowing method in the prior art, the present invention has higher processing efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber capillaries, and in particular to a production process for producing bell-mouth optical fiber capillaries. Background Art

[0002] Fiber optic capillaries are used for fiber optic collimators, adjustment and alignment of optical active and passive devices, and fiber pigtail assembly. The inner holes of fiber optic capillaries are mostly micropores. In order to facilitate the insertion of optical fibers, the ends are generally expanded to form a bell mouth. The existing fiber optic capillary bell mouths are divided into mechanical method, chemical corrosion method, and hot blowing method. The mechanical method is prone to capillary cracking, the chemical corrosion method is not environmentally friendly, and the hot blowing method is widely used. The general operation is to pass an inert gas into the micropores of the fiber optic capillary and make the internal pressure greater than the atmospheric pressure, then heat some areas to form bubbles in the micropores, and then flatten them, and cut them at the bubble position to form the end structure of the bell mouth. However, the hot blowing method has obvious disadvantages: it is necessary to form bubbles one by one on a long fiber optic capillary and flatten and cut them, and the processing efficiency is low. Summary of the invention

[0003] The purpose of the present invention is to provide a production process for producing a bell-mouth optical fiber capillary, which has the effect of high processing efficiency.

[0004] The above technical purpose of the present invention is achieved through the following technical scheme: a production process for producing a bell-mouth optical fiber capillary, comprising the following steps

[0005] Step S1, taking an optical fiber capillary for multi-point clamping, and setting a plurality of heating tube sections on the optical fiber capillary, with clamping sites distributed on both sides of each heating tube section;

[0006] Step S2, introducing an inert gas into the micropore of the optical fiber capillary, and making the gas pressure in the micropore greater than the standard atmospheric pressure;

[0007] Step S3, using a heating device to heat multiple heating tube segments of the optical fiber capillary at the same time, the heating device rotates around the optical fiber capillary to soften the heating tube segments;

[0008] Step S4, after bubbles are formed in the heating tube segment, the inert gas is stopped from being introduced, and a plurality of self-rotating rollers are used to rotate around the heating tube segment, contact and adhere to the outer wall of the heating tube segment, and remove excess softened glass on the outer wall of the heating tube segment;

[0009] Step S5, cutting the optical fiber capillary at the bubble to obtain multiple sections of finished optical fiber capillary with flared ends.

[0010] The present invention is further configured as follows: in step S2, the inert gas is argon.

[0011] The present invention is further configured as follows: in step S2, the air pressure in the micropores of the optical fiber capillary is 0.1014-0.1024 MPa.

[0012] The present invention is further configured as follows: in step S3, the heating device uses an open flame to heat the heating tube section of the optical fiber capillary, and rotates around the heating tube section to heat it evenly.

[0013] The present invention is further configured as follows: in step S3, the temperature at the open flame is 2800-3000° C., and the heating time is 5-9 s.

[0014] The present invention is further configured as follows: in step S4, the bubbles formed are olive-shaped bubbles.

[0015] The present invention is further configured as follows: in step S4, the length of the roller is greater than the length of the heating tube section, and the roller stops approaching the optical fiber capillary when it just contacts the outer wall of the non-heating tube section of the optical fiber capillary, and then detaches after wrapping around the heating tube section for 2-5 turns.

[0016] The beneficial effects of the present invention are as follows: in the prior art, when processing the optical fiber capillary by the hot blowing method, the optical fiber capillary needs to be rotated and bubbles need to be formed one by one. In the present invention, an inert gas is introduced into the micropores of the optical fiber capillary and the heating tube section of the optical fiber capillary is heated. The optical fiber capillary does not rotate, but the heating device rotates, and the flattening or stretching steps are omitted. The self-rotating roller is directly used to adhere the excess softened glass, and multiple bubble structures can be formed at the same time. Compared with the hot blowing method in the prior art, the present invention has higher processing efficiency. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] A production process for producing a bell-mouth optical fiber capillary comprises the following steps:

[0019] Step S1, taking an optical fiber capillary for multi-point clamping, and setting a plurality of heating tube sections on the optical fiber capillary, with clamping sites distributed on both sides of each heating tube section;

[0020] Step S2, introducing an inert gas into the micropore of the optical fiber capillary tube, and making the gas pressure in the micropore greater than the standard atmospheric pressure, the inert gas is argon gas, and the gas pressure in the micropore of the optical fiber capillary tube is 0.1014-0.1024 MPa;

[0021] Step S3, using a heating device to heat multiple heating tube segments of the optical fiber capillary at the same time, the heating device rotates around the optical fiber capillary to soften the heating tube segments; the heating device uses an open flame to heat the heating tube segments of the optical fiber capillary, and rotates around the heating tube segments to heat them evenly, the temperature at the open flame is 2800-3000°C, the heating time is 5-9s, and the rotation speed of the heating device is 10 turns / s.

[0022] Step S4, after the olive-shaped bubbles are formed in the heating tube segment, the inert gas is stopped from being introduced, and a plurality of self-rotating rollers are used to rotate around the heating tube segment, contact and adhere to the outer wall of the heating tube segment, and take away the excess softened glass on the outer wall of the heating tube segment; the length of the roller is greater than the length of the heating tube segment, and when the roller just contacts the outer wall of the non-heating tube segment of the optical fiber capillary, it stops approaching the optical fiber capillary, and after rotating around the heating tube segment for 2-5 more times, it can be detached.

[0023] Step S5, cutting the optical fiber capillary at the bubble to obtain multiple sections of finished optical fiber capillary with flared ends.

Claims

1. A production process for producing a bell-mouth optical fiber capillary, characterized in that: The following steps are included Step S1, taking an optical fiber capillary for multi-point clamping, and setting a plurality of heating tube sections on the optical fiber capillary, with clamping sites distributed on both sides of each heating tube section; Step S2, introducing an inert gas into the micropore of the optical fiber capillary, and making the gas pressure in the micropore greater than the standard atmospheric pressure; Step S3, using a heating device to heat multiple heating tube segments of the optical fiber capillary at the same time, the heating device rotates around the optical fiber capillary to soften the heating tube segments; Step S4, after bubbles are formed in the heating tube segment, the inert gas is stopped from being introduced, and a plurality of self-rotating rollers are used to rotate around the heating tube segment, contact and adhere to the outer wall of the heating tube segment, and remove excess softened glass on the outer wall of the heating tube segment; Step S5, cutting the optical fiber capillary at the bubble to obtain multiple sections of finished optical fiber capillary with flared ends.

2. The production process for producing a bell-mouth optical fiber capillary according to claim 1, characterized in that: In step S2, the inert gas is argon.

3. The production process for producing a bell-mouth optical fiber capillary according to claim 2, characterized in that: In step S2, the air pressure in the micropore of the optical fiber capillary is 0.1014-0.1024 MPa.

4. The production process for producing a bell-mouth optical fiber capillary according to claim 3, characterized in that: In step S3, the heating device uses an open flame to heat the heating tube section of the optical fiber capillary and rotates around the heating tube section to heat it evenly.

5. The production process for producing a bell-mouth optical fiber capillary according to claim 4, characterized in that: In step S3, the temperature at the open flame is 2800-3000°C, and the heating time is 5-9s.

6. A production process for producing a bell-mouth optical fiber capillary according to claim 5, characterized in that: In step S4, the bubbles formed are olive-shaped bubbles.

7. A production process for producing a bell-mouth optical fiber capillary according to claim 6, characterized in that: In step S4, the length of the roller is greater than the length of the heating tube section. When the roller just contacts the outer wall of the non-heating tube section of the optical fiber capillary, it stops approaching the optical fiber capillary and wraps around the heating tube section for 2-5 more times before detaching.