CN2844948Y

CN2844948Y - 1X2 regulated spectroscopic ratio plastic optical fiber coupler

Info

Publication number: CN2844948Y
Application number: CN 200520034317
Authority: CN
Inventors: 陈新桥; 代康
Original assignee: CHENGDU PUTIAN CABLE Co Ltd
Current assignee: CHENGDU PUTIAN CABLE Co Ltd
Priority date: 2005-05-30
Filing date: 2005-05-30
Publication date: 2006-12-06
Anticipated expiration: 2015-05-30

Abstract

The utility model relates to a 1*2 adjustable spectroscopic ratio plastic optical fiber coupler in an optical communication field. The utility model comprises a main optical fiber, a branch optical fiber, a slide block and a basal seat, wherein the main optical fiber and the branch optical fiber are respectively embedded and fixed on the slide block and the basal seat, and the main optical fiber directly contacts the end surface of the branch optical fiber; the relative positions of the contact surfaces of the main optical fiber and the branch optical fiber can be changed along with the slide of the slide block on the basal seat; matching fluid which is matched with refractive indexes is coated between the end surface of the main optical fiber and the end surface of the branch optical fiber. The optical power of the optical fiber coupler of the utility model is directly coupled, a coupling ratio can be adjusted limberly and quantificationally according to requirements. The utility model has the advantages of simple structure, simple and easy preparation method, and low cost, and the utility model is suitable for optical transmission network projects.

Description

1 * 2 adjustable splitting ratio plastic optical fibre coupler

Technical field

The utility model relates to 1 * 2 adjustable splitting ratio plastic optical fibre coupler in the optical communication field, comprises main fiber, branch optical fiber, sliding shoe and pedestal.

Technical background

Fiber coupler is that light signal is carried out shunt or closes a kind of device on road.In recent years, plastic optical fiber has become the domestic and international research focus as the transmission medium of broadband LAN, and plastic optical fiber is expected to compete mutually with cable and silica fibre with significant ratio of performance to price advantage, thereby becomes a kind of main medium of high-speed local area network.Because installation cost occupies quite great proportion in the LAN (Local Area Network) total cost, plastic optical fiber will be obtained significant ratio of performance to price advantage in connecting intensive LAN (Local Area Network), need the plastic optical fibre connector and the coupling mechanism of a large amount of high performance price ratios.The characteristics of and handling ease big based on the plastic optical fiber core diameter, people such as the Japanese Li Yao of NEC Corporation adopted the side coupling process to succeed in developing N * M plastic optical fibre coupler in 1996.At V-notch of optical fiber side etching, utilize light light to be coupled out optical fiber from the side, or from the side optically-coupled is come in the total reflection of otch end face.The plastic optical fibre coupler that this technology adopts the side coupled method to prepare, its branch is all fixed, and its splitting ratio is constant.In being actually used in of plastic optical fibre coupler, need to regulate the splitting ratio of coupling mechanism under some occasion.Chinese patent application numbers 200410081425.6 provides name to be called the reflective plastic optical fibre coupler technology of the changed splitting ratio of plastic optical fibre coupler.Its inventive point is that the fiber position on sliding shoe and the pedestal changes and regulates splitting ratio that this is one of feasible technology path.But it remains the reflection coupling in system.In network engineering, also need to develop a kind of adjustable splitting ratio plastic optical fiber coupling device of direct manifold type.

Summary of the invention

The purpose of this utility model is to provide a kind of 1 * 2 adjustable splitting ratio plastic optical fibre coupler, and main fiber directly contacts with the end face of branch optical fiber, and luminous power directly is coupled in system.Its splitting ratio can carry out flexibly can be quantitative adjusting.

For achieving the above object, the present invention adopts following technical proposals:

A kind of 1 * 2 adjustable splitting ratio plastic optical fibre coupler, comprise main fiber, branch optical fiber, sliding shoe and pedestal, main fiber and branch optical fiber embed respectively and are fixed in sliding shoe and the pedestal, main fiber directly contacts with the end face of branch optical fiber, and the relative position of main fiber and branch optical fiber surface of contact slides on pedestal with sliding shoe and changes; The end face that main fiber contacts with branch optical fiber scribbles the matching fluid of refractive index and main fiber coupling.

Fit structure between sliding shoe and the pedestal is a wedge structure: the sliding shoe xsect is a swallow-tail form, is slidingly matched with swallowtail-shaped slide on the pedestal.The side of sliding shoe and pedestal indicates the arrow and the scale of expression coupling splitting ratio respectively.

The present invention compared with prior art has following conspicuous outstanding substantive distinguishing features and remarkable advantage: the present invention adopts that main fiber is relative with the branch optical fiber surface of contact to slide, and makes the splitting ratio of coupling mechanism can carry out quantitative adjusting flexibly as required; Directly coupling makes that coupler structure is simple, cost is low.

Description of drawings

The utility model is described in further detail below in conjunction with accompanying drawing.A preferred embodiment of the present invention is referring to drawing 1, Fig. 2, Fig. 3 and Fig. 4.

Fig. 1 is the structural representation of one embodiment of the invention;

Fig. 2 is an A-A place sectional view among Fig. 1;

Fig. 3 is a B-B place sectional view among Fig. 1;

Fig. 4 is the coupling mechanism fundamental diagram;

Embodiment

This embodiment comprises main fiber 1 branch optical fiber, 2 sliding shoes 3 and pedestal 4.Its making and assembling process are as follows:

It is 1mm step-refraction index distribution PMMA plastic optical fiber that a main fiber 1 minute and an optical fiber 2 all adopt core diameter.Sliding shoe 3 is square type pieces made from metal or polymkeric substance, and sliding shoe 3 edges adopt wedge-shaped impression 3-3 structure.In the planar central position of sliding shoe 3, vertically bore a cylindrical hole 3-2 that radius ratio optical fiber is bigger.Cylindrical hole 3-2 axis is stamped arrow 3-1 mark at sliding shoe 3 lateral vertical projected position places.

Pedestal 4 is the square type pieces greater than sliding shoe 3 and homogeneity, and pedestal 4 adopts the sphenocephaly 4-3 structure of coincideing with the wedge-shaped impression 3-3 structure of sliding shoe 3.In the in-plane of pedestal 4, vertically bore two and link together, the cylindrical hole 4-2 that radius ratio branch optical fiber 2 is bigger.Allow two cylindrical hole 4-2 carry out vertical projection on the side of pedestal 4, the marginal position on two cylindrical hole 4-2 projecting planes is put on 100%:0 and 0:100% scale respectively, and the position of center line on projecting plane is put on the 50%:50% scale.

The assembling process of coupling mechanism:

A) bottom-up, in (4-2) on two cylindrical holes of two branch optical fibers (2) insertion pedestals (4), the end face of branch (2) is concordant with plane on the pedestal 4, with glue branch optical fiber 2 is fixed among two cylindrical hole 4-2 of pedestal 4.

B) from up to down, main fiber (1) is inserted sliding shoe (3) go up in the cylindrical hole (3-2), the end face of main fiber (1) is concordant with the baseplane of sliding shoe (3), with glue main fiber (1) is fixed on the cylindrical hole (3-2) of sliding shoe (3).

C) contact the matching fluid of coating the same main fiber of refractive index (1) on the end face at main fiber (1) with branch optical fiber (2).

D) the sliding shoe that is embedded with main fiber (1) (3), along sphenocephaly (4-3), be inserted into the wedge-shaped impression (3-3) on the pedestal (4) that is embedded with branch optical fiber (2), allow main fiber (1) directly contact with the end face of branch optical fiber (2).Can slidably reciprocate in the wedge-shaped impression (3-3) of the sphenocephaly (4-3) of pedestal (4) on sliding shoe (3).

The principle of work of this coupling mechanism is referring to Fig. 4.Main fiber 1 directly contacts with the end face of two branch optical fibers 2, luminous power directly is coupled in photosystem, utilize the slip of sliding shoe 3 on pedestal 4, change the end face relative position that main fiber 1 and branch optical fiber 2 directly contact, change the coupling ratio of luminous power in two branch optical fibers 2, and can quantitative flexibly adjusting, thereby reach goal of the invention of the present utility model.

The utility model widespread use optical transport network engineering.

Claims

1, a kind of 1 * 2 adjustable splitting ratio plastic optical fibre coupler comprises main fiber (1), branch optical fiber (2), sliding shoe (3) and pedestal (4), it is characterized in that:

1) optical fiber and branch optical fiber embed respectively and are fixed in sliding shoe (3) and the pedestal (4), and main fiber (1) directly contacts with the end face of branch optical fiber (2);

2) main fiber (1) can be gone up to slide at pedestal (4) with the relative position of branch optical fiber (2) surface of contact and change with sliding shoe (3);

3) scribble the matching fluid of refractive index match between main fiber (1) end face and branch optical fiber (2) end face.

2, according to right 1 described 1 * 2 adjustable splitting ratio plastic optical fibre coupler, it is characterized in that the fit structure between sliding shoe (3) and the pedestal (4) is the wedge structure: pedestal (4) xsect is a swallow-tail form, and the swallow-tail form spill chute (3-3) on its sphenocephaly (4-3) and the sliding shoe (3) is slidingly matched.

3, according to claim 11 * 2 adjustable splitting ratio plastic optical fibre coupler is characterized in that the side of sliding shoe (3) and pedestal (4) indicates the arrow (3-1) and the scale (4-1) of expression coupling splitting ratio respectively.