CN104608020A

CN104608020A - Machining method of double-clad fiber octangle inner clad and fixture

Info

Publication number: CN104608020A
Application number: CN201510055380.3A
Authority: CN
Inventors: 衣永青; 梁小红; 潘蓉; 庞璐; 韩志辉; 王炜豪; 耿鹏程
Original assignee: CETC 46 Research Institute
Current assignee: CETC 46 Research Institute
Priority date: 2015-02-03
Filing date: 2015-02-03
Publication date: 2015-05-13
Anticipated expiration: 2035-02-03
Also published as: CN104608020B

Abstract

The invention relates to a machining method of a double-clad fiber octangle inner clad and a fixture. The fixture comprises a fixture base, clamps and fastening screws. Two grooves matched with a grinding machine are formed in the top end face of the fixture base. The clamps are C-shaped clamp plate with right-angled corners. One pair of opposite clamps and one pair of staggered clamps are screwed at the two ends of the side faces of the fixture through the fastening screws respectively. When a fiber performing bar is placed on the upper end face of the fixture base, the upper end face of the fixture base is composed of a plane and a side plane, wherein an 135-degree angle is formed between the plane and the side plane, and the straight line width of the upper end face is smaller than the outer diameter of the fiber performing bar. In the process of machining, one machined face of the to-be-machined fiber performing bar is attached to the plane of the side, close to a grinding wheel, of the fixture and is fixed to the grinding machine, a second face is machined and polished into a needed size, each newly machined face is perpendicular to the plane, away from a cutter, of the fixture and intersects with the last machined plane, and the included angel of the two planes is 135 degrees. Other faces are machined in the way until all faces are completed. The fixture has the advantages of being easy, convenient, quick and accurate to machine.

Description

A kind of processing method of doubly clad optical fiber octagonal inner cladding and fixture

Technical field

The present invention relates to a kind of inner cladding processing method and fixture of doubly clad optical fiber, particularly a kind of processing method of doubly clad optical fiber octagonal inner cladding and fixture.

Background technology

The early stage rectangular inner cladding structure of doubly clad optical fiber, due to its symmetry, has when pump light transmits in inner cladding and becomes spiral light and cannot be coupled in the middle of fibre core greatly.In order to address this problem, people devise the inner cladding of a lot of geometry to break its circle symmetrical structure, comprise D shape, rectangle, quincunx inner cladding etc., octagonal inner cladding is wherein a kind of, research shows, the inner cladding of this structure to the absorption efficiency of pump light much larger than rectangular inner cladding.Therefore, octagonal inner cladding processing method and fixture thereof are the problems of current research.

Summary of the invention

In view of prior art Problems existing, the invention provides a kind of processing method and fixture of doubly clad optical fiber octagonal inner cladding, concrete technical scheme is, a kind of processing method of doubly clad optical fiber octagonal inner cladding, it is characterized in that, processing method comprises the following steps

(i), to prefabricated rods anneal, obtain preform to be processed, annealing temperature is 1000 ± 50 DEG C, and annealing time is 24 ± 1 hours;

(ii) two planes, preform to be processed being fixed on fixture are fixed on grinding machine, to observe from above with microscope and regulate the excellent core of preform to be processed, make the excellent core of preform to be processed consistent with grinder level moving direction, carry out the processing of first surface and be polished to required size and each fresh processed plane and the plane orthogonal of fixture away from cutter side;

(iii) the plane, by the one side that preform to be processed processes being fitted in the side of the close emery wheel of fixture is fixed on grinding machine, carries out the processing of second and be polished to required size and each fresh processed plane and fixture be 135o away from the plane orthogonal of cutter side, with the angle of a upper Plane intersects processed, two planes;

(iv), two planes two machined surfaces of manufactured for two sides preform being fitted in fixture are fixed on grinding machine, carry out the processing of the 3rd and be polished to required size and each fresh processed plane and fixture are 135o away from the plane orthogonal of cutter side, with the angle of a upper Plane intersects processed, two planes;

(v), in this approach process fourth face, the 5th, the 6th, the 7th, octahedral, the preform processed just becomes standard and the octagonal structure of symmetry.

A kind of fixture for processing of optical fiber octagonal inner cladding, comprise clamping fixture seat, clip, trip bolt, it is characterized in that: clamping fixture seat upper surface is by a plane and become the side plane of 135o to form with it and the linear width of upper surface is less than preform overall diameter, one top end face of clamping fixture seat has to match with grinding machine and two grooves, the C-type clamp plate at the rectangular turning of clip, relatively each, two pairs of clips of dislocation are screwed onto the two ends of clamping fixture seat side respectively with trip bolt, after preform is placed on clamping fixture seat upper surface, adjusting two pairs of clips makes its medial surface be close to preform lateral surface, tighten trip bolt.

Technique effect of the present invention is that processing is easy, quick, accurate.

Accompanying drawing explanation

Fig. 1 is fixture three-dimensional structure diagram of the present invention.

Fig. 2 is chuck side view of the present invention.

Detailed description of the invention

Below in conjunction with accompanying drawing, the present invention is further elaborated.

As Fig. 1, shown in 2, a kind of fixture for processing of doubly clad optical fiber octagonal inner cladding, comprise clamping fixture seat 1, clip 2, trip bolt 3, clamping fixture seat 1 upper surface is by a plane and become the side plane of 135o to form with it and the linear width of upper surface is less than preform overall diameter, one top end face of clamping fixture seat 1 has to match with grinding machine and two grooves 4, the C-type clamp plate at the rectangular turning of clip 2, relatively each, two pairs of clips 2 of dislocation are screwed onto the two ends of clamping fixture seat 1 side respectively with trip bolt 3, after preform is placed on clamping fixture seat 1 upper surface, adjusting two pairs of clips 2 makes its medial surface be close to preform lateral surface, tighten trip bolt 3.

(1), in chamber type electric resistance furnace with the temperature of 950 DEG C to diameter for the Yb dosed optical fiber prefabricated rods that 12mm is to be processed carries out annealing 25 hours, reduce thermal stress remaining in prefabricated rods;

(2), Yb dosed optical fiber prefabricated rods to be processed is fixed on fixture, and fixture is loaded on multi-purpose grinding machine, prefabricated rods is observed from above with microscope, observe while move horizontally prefabricated rods limit, the tilt adjustment leading screw of turn multi-purpose grinding machine is that to regulate prefabricated rods and multi-purpose grinding machine to move horizontally direction consistent; Alignment jig makes emery wheel and fixture away from emery wheel side plane orthogonal;

(3), emery wheel is dropped to close with prefabricated rods height, range estimation emery wheel vertical with the peak of prefabricated rods,

Yb dosed optical fiber prefabricated rods side is ground out-of-plane downwards, the degree of depth is 0.456mm, the degree of depth of reserved 0.4mm strolls cutter polishing, and polishing stopped after 0.6 hour;

(4), by the one side that Yb dosed optical fiber prefabricated rods processes be fitted in fixture in the plane of emery wheel side, fixing, processing second and polishing, is 135o with the angle of a upper Plane intersects processed, two planes;

(5), by manufactured for Yb dosed optical fiber prefabricated rods two sides be fitted in two planes of fixture, the plane wherein just machined is fitted in the plane of emery wheel side, processes the one side polishing that make new advances;

(6), repeat step 5, until machine eight planes, obtain octagonal inner cladding Yb dosed optical fiber prefabricated rods.

Claims

1. a processing method for doubly clad optical fiber octagonal inner cladding, is characterized in that, processing method comprises the following steps,

2. the fixture for processing of an optical fiber octagonal inner cladding, comprise clamping fixture seat (1), clip (2), trip bolt (3), it is characterized in that: a top end face of clamping fixture seat (1) has to match with grinding machine and two grooves (4), the C-type clamp plate at the rectangular turning of clip (2), relatively each, two pairs of clips (2) of dislocation use trip bolt (3) to be screwed onto the two ends of clamping fixture seat (1) side respectively, after preform is placed on clamping fixture seat (1) upper surface, clamping fixture seat (1) upper surface is by a plane and become the side plane of 135o to form with it and the linear width of upper surface is less than preform overall diameter, adjusting two pairs of clips (2) makes its medial surface be close to preform lateral surface, tighten trip bolt (3).