CN203732755U

CN203732755U - Bending resistance type optical fiber coupler

Info

Publication number: CN203732755U
Application number: CN201420076551.1U
Authority: CN
Inventors: 郭文基; 檀立法
Original assignee: Universal Microelectronics Co Ltd
Current assignee: Universal Microelectronics Co Ltd
Priority date: 2014-02-21
Filing date: 2014-02-21
Publication date: 2014-07-23
Anticipated expiration: 2024-02-21

Abstract

The utility model provides a bending resistance type optical fiber coupler comprising two optical fibers. Each optical fiber comprises a conventional optical fiber which is arranged at the middle portion and has a length ranging from 10mm to 15mm. Bending resistance type optical fibers arranged on two ends of the conventional optical fiber are further comprised. The two conventional optical fibers are fused together to form a coupling cone having two large ends and a small middle portion, and then, the coupling cone is fixed in a quartz substrate through waterproof adhesive. According to the bending resistance type optical fiber coupler of the utility model, the size of an optical fiber coupler module can be greatly reduced.

Description

A kind of counter-bending fiber coupler

Technical field

The utility model patent relates to the optical passive component of optical communication, light sensing and Test Application, especially a kind of counter-bending fiber coupler.

Background technology

In the packaging technology of fiber coupler, the size of its modular cartridge depends on the bending diameter of fiber coupler size and optical fiber, and the routine size of fiber coupler is 45 ~ 54mm, if shorten and draw cone length with forms of corrosion or little duration and degree of heating mode, its size of devices of making is about 30 ~ 40mm left and right, but still be subject to the restriction that conventional fiber bending radius is too large, its modular cartridge length scale also can only reduce 15mm left and right, and the counter-bending fiber coupler that the utility model is made, though its device length remains unchanged, but because having adopted resistant to bending optical fiber, its bending radius can significantly be dwindled, can be down to 5 ~ 15mm by the bending radius 60mm of conventional fiber, depending on adopted counter-bending optical fiber kind, the counter-bending fiber coupler so manufacturing, can be assembled in the modular cartridge of 60x40x10mm, than assembling conventional fiber coupling mechanism, required modular cartridge 100x80x10mm is little many, greatly improve the utilization factor in communications equipment room space.

Do not overcome in the past counter-bending optical fiber large problem of excess loss in the time drawing cone always, so be difficult to produce counter-bending fiber coupler, the utility model adopts a bit of conventional fiber to replace counter-bending optical fiber, continue with heat sealing machine therebetween, because the mode field diameter of counter-bending optical fiber can be followed conventional fiber compatibility, so its connecting loss with conventional fiber is very little, after professional technician adjusts splicing parameter, the loss of each contact can be less than 0.05dB, therefore can specific implementation the utility model.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of counter-bending fiber coupler and manufacture method thereof, can dwindle significantly the size of fiber coupler module.

The utility model solves the problems of the technologies described above by the following technical programs: a kind of counter-bending fiber coupler, it comprises two optical fiber, every optical fiber comprises the conventional fiber that the length in the middle of being arranged on is 10 ~ 15mm, also comprise the counter-bending optical fiber that is arranged on these conventional fiber two ends, two conventional fibers are fused together mutually, form the little coupling cone in large centre, two, then by marine glue, described coupling cone is fixed in quartz base plate;

Entangle quartz base plate by glass tube or heat-shrink tube, then seal with another kind of marine glue in two ends, to complete the once semi-manufacture of encapsulation, one time packaging semi-finished product is arranged in a metal tube, between packaging semi-finished product and inner wall of metal tube, and the right and left of a packaging semi-finished product arranges silica gel, a packaging semi-finished product is sealed in whole metal tube completely.

As further improvement of the utility model, counter-bending optical fiber refers to and meets ITU-T G652D and the G.657 counter-bending optical fiber of A2/B2 of ITU-T simultaneously.

As further improvement of the utility model, counter-bending optical fiber refers to and meets ITU-T G652D and the G.657 counter-bending optical fiber of B3 of ITU-T simultaneously.

The beneficial effects of the utility model are:

The utility model adopts a bit of conventional fiber to replace counter-bending optical fiber, continue with heat sealing machine therebetween, to overcome counter-bending optical fiber, this is difficult for the problem being coupled, excess loss is large in the time drawing cone, the counter-bending fiber coupler so manufacturing, can be assembled in the modular cartridge of 60x40x10mm, than assembling conventional fiber coupling mechanism, required modular cartridge 100x80x10mm is little many, greatly improves the utilization factor in communications equipment room space.

Brief description of the drawings

Fig. 1 is the schematic diagram of conventional fiber coupler structure;

Fig. 2 is the schematic diagram of the counter-bending fiber coupler structure of the utility model;

Fig. 3 is for completing the semi-manufacture key diagram of fused biconical taper and fixing base;

Fig. 4 is for completing packaging semi-finished product key diagram one time;

Fig. 5 is for completing secondary encapsulation finished product key diagram.

In figure, each component names is as follows:

1a, 1b, 1c, 1d refer to meet simultaneously ITU-T G652D and ITU-T G.657 A2/B2 (routine Corning LBL Fiber) or ITU-T G.657 these three of B3(be the title of international optical fiber with English abbreviation) counter-bending optical fiber (routine Corning ZBL Fiber).

2a, 2b conventional fiber

3a, 3b, 3c, 3d splicing point

4 quartz base plates

5a.5b glue

6 glass tubes or heat-shrink tube

7a, 7b marine glue

8 metal tubes

9 silica gel.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described further.

Fig. 1 is the schematic diagram of conventional fiber coupler structure, only use a kind of conventional fiber as material, wherein there is no splicing point, Fig. 2 to Fig. 5 is the schematic diagram of the counter-bending fiber coupler structure of the utility model, wherein between counter-bending optical fiber and conventional fiber, there is splicing point, depending on the kind of coupling mechanism, can there be 3 (1x2) or 4 (2x2) splicing points.(1x2 refers to three fiber port coupling mechanisms, and 2x2 refers to four fiber port coupling mechanisms).

A kind of counter-bending fiber coupler, it comprises two optical fiber, every optical fiber comprises the conventional fiber that the length in the middle of being arranged on is 10 ~ 15mm, also comprise the counter-bending optical fiber that is arranged on these conventional fiber two ends, two conventional fibers are fused together mutually, form the little coupling cone in large centre, two, then by marine glue, described coupling cone is fixed in quartz base plate;

Counter-bending optical fiber refers to and meets ITU-T G652D and the G.657 counter-bending optical fiber of A2/B2 of ITU-T simultaneously, or counter-bending optical fiber refers to and meets ITU-T G652D and the G.657 counter-bending optical fiber of B3 of ITU-T simultaneously.As: Corning LBL Fiber or Corning ZBL Fiber.

The manufacture method of above-mentioned a kind of counter-bending fiber coupler, comprises the following steps:

Step 1. is removed optical fiber coating: remove respectively counter-bending optical fiber (1a, 1b, 1c, 1d) coat and a bit of conventional fiber (2a, the 2b) coat for the treatment of coupling regime, and wiped clean; Counter-bending optical fiber, as: Corning LBL Fiber or Corning ZBL Fiber(Corning LBL Fiber or Corning ZBL Fiber refer to the model of Corning company optical fiber);

Step 2. continues: counter-bending optical fiber (1a in figure, 1b are followed with heat sealing machine respectively in the two ends at a bit of conventional fiber (2a, 2b in figure), 1c, 1d) (3a in figure, 3b continue, 3c, 3d), then the optical fiber cable continuing taken out and keep clean;

Step 3. fused biconical taper and be fixed on substrate: by two optical fiber cables that continue through step 2. beat strand or parallel near, make conventional fiber treat coupling regime mutually near, and be fixed on draw cone fixture on, treat coupling regime with flame or well heater heating and melting again and stretch to two ends, two conventional fibers are fused together mutually, form the little coupling cone in large centre, two, then use glue (5a.5b in figure) that described coupling cone is fixed in quartz base plate 4;

Step 4. once encapsulates: entangle quartz base plate 4 pyrocondensations with glass tube or heat-shrink tube 6, then in two ends with another kind of marine glue (7a, 7b in figure) sealing, to complete the once semi-manufacture of encapsulation;

Step 5. secondary encapsulation a: packaging semi-finished product of complete is put into a metal tube 8, between packaging semi-finished product and metal tube 8 inwalls, and the right and left filling gel 9 of a packaging semi-finished product, a packaging semi-finished product is sealed in whole metal tube 8 completely, so completes primary antibodie curved fiber coupling mechanism.

Counter-bending optical fiber in described step 1 (1a in figure, 1b, 1c, 1d) refers to and meets ITU-T G652D and G.657 A2/B2 or the G.657 counter-bending optical fiber of B3 of ITU-T of ITU-T simultaneously.

In described step 2, be to adopt a bit of conventional fiber (2a, 2b in figure) to replace counter-bending optical fiber to do fused biconical taper, its length is about 10 ~ 15mm.

In described step 4, splicing point is to be encapsulated in quartz base plate 4, fixedly guarantees its physical strength with glue (5a.5b in figure).

Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.

Claims

1. a counter-bending fiber coupler, it is characterized in that: it comprises two optical fiber, every optical fiber comprises the conventional fiber that the length in the middle of being arranged on is 10 ~ 15mm, also comprise the counter-bending optical fiber that is arranged on these conventional fiber two ends, two conventional fibers are fused together mutually, form the little coupling cone in large centre, two, then by marine glue, described coupling cone is fixed in quartz base plate;

2. counter-bending fiber coupler as claimed in claim 1, is characterized in that: counter-bending optical fiber refers to and meets ITU-T G652D and the G.657 counter-bending optical fiber of A2/B2 of ITU-T simultaneously.

3. counter-bending fiber coupler as claimed in claim 1, is characterized in that: counter-bending optical fiber refers to and meets ITU-T G652D and the G.657 counter-bending optical fiber of B3 of ITU-T simultaneously.