CN209821426U - Beam combining optical fiber for improving laser direct writing optical power, optical fiber connector and connector structure - Google Patents

Abstract

The utility model discloses an improve closing of laser direct writing luminous power and restraint optic fibre, optical fiber splice and joint design belongs to laser direct imaging technical field, include the optic fibre bundle of constituteing by a plurality of ways optic fibre, the optic fibre bundle cross-section is rectangular form, and its length, width are less than respectively rather than the length of complex optical wand contact terminal surface, wide. The utility model discloses when guaranteeing that the edge of optic fibre bundle light-emitting window falls in rather than the complex optical wand terminal surface, the optic fibre way number that can support is greater than the optic fibre way number that can support of the optic fibre bundle that adopts the circular distribution of class, has promoted the way number of the laser pipe that single laser instrument supported, has promoted the optical power of laser instrument indirectly, has prolonged complex optical device's life with it.

Description

Beam combining optical fiber for improving laser direct writing optical power, optical fiber connector and connector structure

Technical Field

The utility model relates to a laser direct imaging technical field, in particular to improve close of laser direct writing luminous power and restraint optic fibre, fiber splice and joint design.

Background

The laser diodes are unevenly distributed in the fast-slow axis direction, namely, the light emitting size in the fast axis direction (vertical to the p-n junction direction) is small, and the light emitting size in the slow axis direction (parallel to the p-n junction direction) is large. Therefore, the output light beam of the laser diode is usually coupled into the optical fiber, so that the light intensity distribution of the output light spot becomes uniform, and the quality of the light beam is improved, which is called as a laser diode optical fiber coupling technology.

In the field of laser direct imaging, most of the laser modules used are laser diode fiber-coupled array modules, on which a multi-fiber bundle fiber is connected, and light is introduced into an optical system through the bundle fiber. The front end of the optical system generally uses a compound eye or elongated collimation to ensure that the light is projected onto the DMD chip. The conventional beam combining fiber is in a quasi-circular shape, and the light emitting spots are distributed in a quasi-circular shape as shown in fig. 1.

However, in practical applications, the circular-like beam combining fiber has the following defects in laser direct imaging: (1) the diameter of the light-combined optical fiber is larger, but the structure of the optical rod inside the collimation matched with the light-combined optical fiber is generally thinner, for example, a 105um/125um optical fiber is taken as an example, the thickness of the optical rod is 1.3 mm, when the number of the traditional optical fiber bundle optical fibers exceeds 66 paths, the edge of the light outlet of the optical fiber bundle easily falls outside the optical rod, so that not only is the extra loss of optical energy easily caused, but also the attenuation of the light transmittance of the optical rod is easily accelerated. (2) The round light outlet enables energy to be concentrated, if the end face of the optical fiber is slightly dirty, local temperature is easily too high, and the optical fiber light outlet or a connector structure is easily burnt. (3) Because the light energy of the light outlet of the optical fiber is relatively concentrated, the adjustment difficulty of the light uniformity is higher, the use of the compound eye structure is beneficial to improving the light uniformity, but the cost is higher, and the light energy loss is also higher.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the defect among the above-mentioned background art, improve laser direct writing optical power.

In order to achieve the above object, on one hand, a beam combining optical fiber for improving the laser direct writing optical power is adopted, which comprises an optical fiber beam composed of a plurality of optical fibers, wherein the cross section of the optical fiber beam is in a strip shape, and the length and the width of the optical fiber beam are respectively smaller than the length and the width of a contact end face of an optical rod matched with the optical fiber beam.

Furthermore, the optical fibers are arranged in a staggered or regular manner.

Further, the cross section of the optical fiber bundle is rectangular or elliptical.

In a second aspect, an optical fiber connector for improving laser direct writing optical power is adopted, and comprises a textured nut and a ferrule connector which is connected with a collimation interface in a matched mode, wherein the collimation interface is in threaded connection with the textured nut and fixes the ferrule connector, an optical fiber bundle is fixed on the ferrule connector and is the combined optical fiber, a light outlet of the ferrule connector is in a long strip shape, and the length and the width of the light outlet are respectively smaller than the length and the width of a contact end face of an optical rod matched with the light outlet.

Furthermore, the ferrule connector is provided with a first fool-proof structure so that the orthographic projection of the light outlet is in the contact end face of the optical rod matched with the light outlet.

Further, the first fool-proof structure is an identification line arranged on the side face of the ferrule connector along the axial direction.

Furthermore, the first fool-proof structure is a clamping groove or a clamping block which is formed in the side face of the ferrule connector along the axial direction.

Further, the ferrule adapter is a cuboid to serve as the first fool-proof structure.

In a third aspect, a connector structure adapted to the optical fiber connector is adopted, and includes a base, a sliding member and a plug, the sliding member is connected between the base and the plug, the sliding member and the base are connected in a sliding manner, and the plug is provided with a cavity for accommodating the optical fiber connector.

Furthermore, the cavity is provided with a second fool-proof structure, and the second fool-proof structure is matched with the first fool-proof structure of the ferrule connector to enable the orthographic projection of the light outlet to be in the contact end face of the optical rod matched with the light outlet.

Furthermore, the second fool-proof structure is a clamping block or a clamping groove arranged on the inner side surface of the cavity along the axial direction, so that the clamping block or the clamping block arranged on the side surface of the ferrule connector is mutually embedded to enable the end surface opening to be orthographically projected in the end surface contacted with the optical rod.

Further, the cavity is square to fit the square ferrule adapter within the end face that the optical wand contacts.

Furthermore, the outer side surface of the optical fiber bundle matching structure is provided with a mark line along the axial direction so as to be aligned and assembled with the mark line axially arranged on the outer side surface of the ferrule connector, so that the light outlet orthographic projection is in the end surface of the optical rod matched with the light outlet orthographic projection.

Compared with the prior art, the utility model discloses there are following technological effect: traditional fiber bundle cross-section is square or hexagon, and its light-emitting spot is the distribution of quasi-circular, because it is generally thinner with the inside optical wand of fiber joint complex joint design for example collimation structure, when guaranteeing that the edge of fiber bundle light-emitting opening is through the joint design and falls in the optical wand terminal surface, the fiber path number that can support is less than the cross-section that adopts in this scheme and is the fiber path number that the fiber bundle supported that rectangular form distributes, the path number of the laser pipe that the single laser supported has been promoted, the optical power of laser has been promoted indirectly. In addition, the edge of the light outlet of the optical fiber bundle arranged in a similar circle is easy to fall outside the optical rod, so that extra loss of light energy is caused, and the attenuation of the collimated light transmittance and the light outlet rate of the optical fiber are easy to accelerate. The optical fiber bundle is distributed in a long strip shape, the length and the width of the section of the optical fiber bundle are respectively smaller than those of the contact end face of the optical rod matched with the optical fiber bundle, the edge of the light outlet is ensured to fall in the end face of the optical rod, and the attenuation rate of the optical fiber bundle and the optical rod is reduced.

Drawings

The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings:

FIG. 1 is a cross-sectional view of a prior art optical fiber bundle as set forth in the background section;

FIG. 2 is a schematic cross-sectional view of a bundled optical fiber;

FIG. 3 is a schematic cross-sectional view of another bundled optical fiber;

FIG. 4 is a schematic view of a fiber optic connector configuration with identification lines;

FIG. 5 is a schematic end view of an optical fiber splice;

FIG. 6 is a schematic end view of another fiber optic connector;

FIG. 7 is a schematic view of a fiber optic connector configuration having a square ferrule connector;

FIG. 8 is a schematic diagram of a fiber optic connector with a card slot;

FIG. 9 is a schematic view of a fiber optic connector with a latch;

FIG. 10 is a schematic view of a connector structure adapted to the optical fiber structure of FIG. 8;

FIG. 11 is a schematic view of a connector structure adapted to the optical fiber structure of FIG. 9;

FIG. 12 is a schematic view of a connector structure adapted to the fiber optic connector of FIG. 7;

fig. 13 is a cross-sectional view of the joint structure.

In the figure:

10-ferrule connector, 20-optical fiber bundle, 30-textured nut, 11-light outlet, 12-marking line, 13-clamping groove, 14-clamping block, 41-optical fiber bundle matching connector, 42-optical rod, 43-fixed terminal, 44-connector structure, 441-base, 442-sliding part, 443-plug and 444-cavity.

Detailed Description

To further illustrate the features of the present invention, please refer to the following detailed description and accompanying drawings. The drawings are for reference and illustration purposes only and are not intended to limit the scope of the present disclosure.

As shown in fig. 2 to fig. 3, the present embodiment discloses a beam combining optical fiber for improving the optical power of laser direct writing, which includes an optical fiber bundle composed of a plurality of optical fibers, wherein the cross section of the optical fiber bundle is in a strip shape, and the length and width of the optical fiber bundle are respectively smaller than the length and width of the contact end surface of the optical rod matched with the optical fiber bundle. In this embodiment, the lengths and widths of the long strips are different, and the lengths and widths are respectively smaller than the lengths and widths of the contact end surfaces of the optical rods matched with the long strips, so as to ensure that all light emitted from the optical fiber bundle falls in the end surfaces of the optical rods, thereby reducing the attenuation rates of the optical fiber bundle and the optical rods.

It should be understood that the elongated shape of the present embodiment includes rectangular, oval, parallelogram, isosceles trapezoid, and other irregular shapes.

It should be noted that, taking 105um/125um optical fiber as an example, a common collimation is adopted, the thickness of the optical rod is 1.3 mm, and when the number of the conventional optical fibers exceeds 66, the edge of the light outlet of the optical fiber bundle easily falls outside the matching structure. When the optical fiber bundle adopts the strip distribution in the embodiment, the maximum supportable optical fiber path number is 624, which can greatly increase the path number of the laser tubes supported by a single laser, indirectly increase the optical power of the laser, and prolong the service life of the optical device matched with the laser.

Further, the optical fibers are arranged in a staggered manner or in a regular manner, wherein the regular arrangement is as shown in fig. 2, and each row or each column of optical fibers is arranged in an aligned manner. Staggered means that each row or column of optical fibers is staggered. In practical applications, in order to reduce the processing difficulty, the optical fibers may be arranged in a staggered manner, and need not be arranged regularly.

Further, in order to increase the transmission efficiency, the end of the optical fiber is coated with an antireflection film.

As shown in fig. 4, the present embodiment discloses an optical fiber connector for improving laser direct writing optical power, which includes a textured nut 30 and a ferrule connector 10 connected to a matching sheet of a collimating interface, where the ferrule connector 10 may be a metal ferrule connector or a ceramic ferrule connector, the collimating interface is connected to the textured nut and fixes the ferrule connector 10, the ferrule connector 10 is fixed with an optical fiber bundle 20, the optical fiber bundle 20 is the combined optical fiber according to the above embodiment, an opening on an end face of the ferrule connector is a light exit 11, which is in a shape of a strip, and a length and a width of the light exit 11 are respectively smaller than a length and a width of a contact end face of an optical rod matched with the light exit 11.

Preferably, the optical fiber connector is schematically shown in fig. 5-6, and the light outlet 11 is a rounded rectangle or a right-angled rectangle.

The optical fiber fixing device comprises an optical fiber bundle, wherein each optical fiber and one FC ceramic ferrule are connected, after the optical fiber and the ferrules are connected, a certain installation length needs to be reserved for each optical fiber, a PVC pipe is sleeved outside the optical fiber which is reserved and installed to protect the optical fiber, and except for the optical fiber part which is reserved and installed, after all the optical fibers are combined, a metal corrugated pipe wraps the outside of the optical fiber bundle to protect the optical fiber bundle, so that the optical fiber bundle is prevented from being bent excessively, and meanwhile, the fixing effect is achieved.

It should be noted that, in this embodiment, the joint structure is a structure that is arranged at the front end of the optical system and is matched with the optical fiber connector, and an opening of an end face of the plug connector in the prior art is circular, and energy of the circular light outlet is very concentrated, for example, if an end face of the optical fiber is slightly dirty, local temperature is easily too high, and the optical fiber light outlet is burned or the joint structure is burned. In the present embodiment, the light exit of the ferrule-based connector end face is designed into a long strip shape, and the shape and size of the long strip shape are consistent with those of the beam combining optical fiber in the above embodiments, so that the long strip-shaped light exit can increase the contact area between the beam combining optical fiber and the connector end face, reduce the energy density of the contact end face, and reduce the risk of damaging the optical device.

Further, when assembling optical fiber splice and joint design, need to make the light-emitting window that the lock pin connects drop inside rather than the face of contact complex joint design behind the orthographic projection to guarantee that the edge of optic fibre bundle light-emitting window drops inside its face with the joint design contact, for this reason, this embodiment has set up first fool-proofing structure to the lock pin joint, in order when assembling optical fiber splice and joint design, can be with the accurate whole of light-emitting window that the lock pin connects drop in the optical rod terminal surface. Wherein, first fool-proof structure specifically includes following several forms:

(1) in order to effectively meet the requirements of the old version, as shown in fig. 4, an identification line 12 is arranged on the outer side surface of the ferrule joint along the axial direction to serve as a first fool-proof structure.

Preferably, two identification lines 12 can be arranged on the outer side surface of the ferrule connector, and the identification lines 12 are symmetrically arranged on two long side edges of the light outlet or symmetrically arranged on two wide side edges of the light outlet. And set up two sign lines in joint design periphery side, the sign line symmetry sets up at two long avris of optical wand terminal surface or symmetry sets up at two broad avris of optical wand terminal surface, satisfies promptly when optical fiber splice and joint structure assembly, the complete orthographic projection of light-emitting port that the lock pin connects is in rather than complex optical wand terminal surface.

(2) In order to reduce the assembly difficulty, as shown in fig. 7, in this embodiment, the ferrule connector is designed as a rectangular parallelepiped to serve as a first fool-proof structure, and the port of the connector structure connected to the ferrule connector is designed as a rectangular shape.

(3) In order to reduce the assembly difficulty, as shown in fig. 8-9, a clamping groove 13 or a clamping block 14 is axially formed on the outer side surface of the ferrule connector to serve as a first fool-proof structure, and the clamping block 14 or the clamping groove 13 is correspondingly formed on the inner side surface of the connector structure along the axial direction to perform clamping fit during assembly, so that the light outlet is completely located in the end surface contacted with the optical rod.

This embodiment also discloses a connector structure 44 adapted to an optical fiber connector, which includes a base 441, a sliding member 442 and a plug 443, wherein the sliding member 442 is connected between the base 441 and the plug 443, the base 441 is provided with a cavity, the sliding member 442 is disposed in the cavity and can slide in the cavity, and the plug 443 is provided with a cavity 444 for accommodating the optical fiber connector.

Specifically, the joint structure 44 in this embodiment is a structure that is disposed at the front end of the optical system and is matched with an optical fiber splice, the optical fiber splice in the above embodiment is matched with the optical system, such as a collimating structure, through the joint structure 44, the collimating structure includes an optical fiber bundle mating connector 41 and an optical rod 42 disposed in the optical fiber bundle mating connector, the optical rod 42 is fixed in the optical fiber bundle mating connector 41 through a fixing terminal 43, the joint structure 44 is in snap-fit connection with one end of the optical fiber mating connector 41, such as the connector 44 is a female connector, and the optical fiber mating connector 41 is a male connector.

Specifically, as shown in fig. 13, the base 441 is provided with a circular cavity, and the sliding member 442 is a circular boss, the diameter of which is smaller than that of the cavity, but the opening of the cavity is smaller than that of the circular boss, so that the circular boss is limited in the cavity and can slide flexibly in the cavity. By inserting the ferrule connector part in the optical fiber connector in the above embodiment into the cavity 444 and adjusting the position of the circular boss in the cavity, the uniformity of the output light spot of the connector structure can be conveniently and simply adjusted.

Further, the cavity 44 is provided with a second fool-proof structure, and the second fool-proof structure is matched with the first fool-proof structure of the ferrule connector, so that the orthographic projection of the light outlet is in the contact end face of the optical rod matched with the light outlet. Wherein the second fool-proof structure correspondingly comprises the following forms:

(1) an identification line is arranged on the outer side face of the plug 443 along the axial direction, so that the identification line is aligned with the identification line 12 arranged on the side face of the ferrule joint, and the light outlet is orthographically projected into an end face contacted with a light rod matched with the light outlet.

(2) As shown in fig. 12, the cavity 44 is square in shape to facilitate fitting the square ferrule adapter within the end face that the optical wand contacts.

(3) As shown in fig. 10-11, a latch 14 or a latch 13 is disposed on an inner side surface of the cavity 444 along an axial direction, so as to be engaged with the latch 13 or the latch 14 disposed on an outer side surface of the ferrule adapter 10, so that the end surface opening is entirely dropped into the end surface contacting with the optical rod engaged therewith.

It should be understood that, the specific position of the identification line, the slot or the fixture block is not limited in this embodiment, and only when the fiber splice side identification line is aligned with the joint structure side identification line, it is sufficient that the ferrule end face light-emitting port all falls into the optical rod end face, and after the fiber splice and the joint structure are mutually embedded, the ferrule end face light-emitting port all falls into the optical rod end face.

It should be noted that, by designing the light outlet on the end face of the ferrule in the optical fiber connector to be a strip shape and carrying out adaptive structural design on the ferrule end and the connector structure, the difficulty of adjusting the energy uniformity is reduced, and the situation of high light uniformity requirement can be met; meanwhile, compound eyes are not needed, and the cost of using the compound eyes is reduced.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (10)

1. A beam-combining optical fiber for improving the laser direct writing optical power is characterized by comprising an optical fiber beam consisting of a plurality of optical fibers, wherein the section of the optical fiber beam is in a strip shape, and the length and the width of the optical fiber beam are respectively smaller than those of a contact end face of an optical rod matched with the optical fiber beam.

2. The beam combining fiber for increasing the power of laser direct writing light according to claim 1, wherein the plurality of optical fibers are arranged in a staggered or regular manner.

3. The beam combining optical fiber for increasing the optical power of laser direct writing according to claim 1 or 2, wherein the cross section of the optical fiber beam is rectangular or elliptical.

4. An optical fiber connector for improving laser direct writing optical power comprises a textured nut and a ferrule connector in matched connection with a collimation interface, wherein the collimation interface is in threaded connection with the textured nut and fixes the ferrule connector, and a fiber bundle is fixed on the ferrule connector.

5. The optical fiber splice for increasing the power of laser direct writing light according to claim 4, wherein the ferrule splice is provided with a first fool-proof structure so that the light outlet projects in the contact surface of the optical rod.

6. The optical fiber splice for improving the optical power of laser direct writing according to claim 5, wherein the first fool-proofing structure is a mark line arranged along the axial direction on the side surface of the ferrule splice.

7. The optical fiber connector for improving laser direct writing optical power according to claim 5, wherein the first fool-proof structure is a slot or a block formed on a side surface of the ferrule connector along an axial direction.

8. The optical fiber connector for improving the power of laser direct writing light according to claim 5, wherein the ferrule connector is a rectangular parallelepiped to serve as the first fool-proof structure.

9. A connector structure for use in an optical fiber connector according to any of claims 4-8, comprising a base, a sliding member and a plug, wherein the sliding member is connected between the base and the plug, the sliding member and the base are slidably connected, and the plug is provided with a cavity for receiving the optical fiber connector.

10. The joint structure of claim 9, wherein the cavity is provided with a second fool-proof structure, and the second fool-proof structure cooperates with the first fool-proof structure of the ferrule adapter to orthographically project the light outlet into the contact end surface of the optical rod cooperating therewith.