CN112068254A

CN112068254A - Optical fiber coupler

Info

Publication number: CN112068254A
Application number: CN202010995389.3A
Authority: CN
Inventors: 黄仁珠
Original assignee: Jiangxi Madishi Technology Co ltd
Current assignee: Jiangxi Madishi Technology Co ltd
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2020-12-11

Abstract

The invention is suitable for the technical field of medical instruments, and provides an optical fiber coupler which comprises a mounting seat, an input seat assembly, a lens assembly and a first adjusting assembly. The installation channel has been seted up on the mount pad, and input seat subassembly sliding connection is in the installation channel for the installation input optic fibre, lens subassembly set up in the installation channel, and on first adjusting part wore to locate the mount pad, the one end and the input seat subassembly butt in stretching into the installation channel of first adjusting part, with fixed input seat subassembly. According to the optical fiber coupler provided by the invention, the input seat assembly can slide along the mounting channel, the distance between the input optical fiber and the lens assembly is adjusted, the transmission efficiency of the input optical fiber is improved, the first adjusting assembly can loosen or tightly abut against the input seat assembly, so that the input seat assembly can slide in the mounting channel or can be fixed in the mounting seat, the problem that the position of a focus is influenced by errors generated when the existing coupler lens and other components are assembled is solved, and the transmission efficiency is improved.

Description

Optical fiber coupler

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to an optical fiber coupler.

Background

The optical fiber coupler is a device for detachable connection between optical fibers, and precisely butt-joints two end faces of the optical fibers so that light energy output by a transmitting optical fiber can be coupled into a receiving optical fiber to the maximum extent, and the optical fiber coupler is inserted into an optical link so as to minimize the influence on a system.

Most parts of the existing coupler are fixed, but certain differences are caused by errors generated when a lens and other parts are assembled, and the differences directly influence the position of a focusing point, so that the transmission efficiency is low.

Disclosure of Invention

An object of an embodiment of the present invention is to provide an optical fiber coupler, so as to solve the technical problem that an error generated when assembling a conventional coupler lens and other components affects the position of a focus point.

In order to achieve the purpose, the invention adopts the technical scheme that: there is provided an optical fiber coupler comprising:

the mounting seat is provided with a mounting channel;

the input seat assembly is connected in the mounting channel in a sliding mode and used for mounting an input optical fiber;

a lens assembly disposed within the mounting channel; and

the first adjusting assembly penetrates through the mounting seat, and one end of the first adjusting assembly, which extends into the mounting channel, is abutted against the input seat assembly to fix the input seat assembly.

Optionally, the first adjustment assembly comprises:

the first mounting plate is arranged on the mounting seat; and

the first adjusting bolt sequentially penetrates through the first mounting plate and the mounting seat, and the threaded end of the first adjusting bolt extends into the mounting channel and abuts against the input seat assembly.

Optionally, the lens assembly is slidably connected in the mounting channel, and the optical fiber coupler further includes:

and the second adjusting assembly penetrates through the mounting seat, and one end of the second adjusting assembly, which extends into the mounting channel, is connected with the input seat assembly so as to fix the lens assembly.

Optionally, the second adjustment assembly comprises:

the second mounting plate is arranged on the mounting seat; and

and the second adjusting bolt sequentially penetrates through the second mounting plate and the mounting seat, and the threaded end of the second adjusting bolt extends into the mounting channel and is connected with the lens assembly.

Optionally, the lens assembly comprises:

the connecting seat is internally provided with a mounting hole;

the first lens is arranged in the mounting hole, is positioned at one side close to the input seat assembly and is used for collimating light; and

and the second lens is arranged in the mounting hole, is positioned on one side far away from the input seat component and is used for focusing light.

Optionally, two end surfaces of the first lens are coated with antireflection films respectively, and two end surfaces of the second lens are coated with antireflection films respectively.

Optionally, a focal length of the first lens is greater than a focal length of the second lens.

Optionally, the lens assembly further comprises:

and the spacing column is arranged in the mounting hole and is positioned between the first lens and the second lens, two ends of the spacing column are respectively abutted against the first lens and the second lens, and a light path channel is formed in the spacing column. Optionally, an end surface of the second lens, which is far away from the input base assembly, abuts against an inner wall of the mount, and the lens assembly further includes:

the third mounting plate is fixedly connected with one end, facing the input seat assembly, of the mounting seat; and

and the elastic piece is positioned between the mounting plate and the first lens and is used for abutting against the first lens and the second lens.

Optionally, the optical fiber coupler further comprises:

and the output assembly is connected with the end face, far away from the input seat assembly, of the mounting seat and is used for mounting an output optical fiber.

The optical fiber coupler provided by the invention has the beneficial effects that: compared with the prior art, the optical fiber coupler has the advantages that the input seat assembly can slide along the installation channel, so that the distance between the input optical fiber and the lens assembly is adjusted, the transmitting end of the input optical fiber is located at the focus of the lens assembly, the transmission efficiency of the input optical fiber is improved, the first adjusting assembly can loosen or abut against the input seat assembly, the input seat assembly can slide in the installation channel or the input seat assembly can be fixed in the installation seat, the problem that the position of the focus is influenced by errors generated when the existing coupler lens and other components are assembled is solved, and the transmission efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic perspective view of an optical fiber coupler according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of an optical fiber coupler according to an embodiment of the present invention;

FIG. 3 is a partially enlarged view of portion A of FIG. 2;

FIG. 4 is a partially enlarged view of the portion B in FIG. 2;

FIG. 5 is a schematic perspective view of a fiber coupler according to an embodiment of the present invention with the mounting base removed;

FIG. 6 is a schematic diagram of an exploded view of a lens assembly employed in an embodiment of the present invention;

FIG. 7 is an exploded view of an input housing assembly used in accordance with an embodiment of the present invention;

FIG. 8 is a schematic diagram of the optical path of a fiber coupler used in an embodiment of the present invention;

FIG. 9 is a spectrum of an antireflection film.

Wherein, in the figures, the respective reference numerals:

1-mounting a base; 11-installing a channel; 2-an input socket assembly; 21-a seat body; 22-input plug; 23-installing an elastic sheet; 24-a second bolt; 3-a lens assembly; 31-a connecting seat; 310-mounting holes; 32-a first lens; 33-a second lens; 34-spacer pillars; 340-an optical path channel; 35-a third mounting plate; 36-an elastic member; 37-a first bolt; 4-a first adjustment assembly; 41-a first mounting plate; 42-a first adjusting bolt; 5-a second adjustment assembly; 51-a second mounting plate; 52-a second adjusting bolt; 6-an output component; 61-an output panel; 62-a spring leaf; 63-output plug; 7-input optical fiber; 8-output optical fiber; l1-spectrum of lens entrance face coated with antireflection film; l2-spectrum of antireflection film coated lens exit face.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1 to 4, a fiber coupler according to an embodiment of the present invention will be described. The optical fiber coupler comprises a mounting seat 1, an input seat assembly 2, a lens assembly 3 and a first adjusting assembly 4. Wherein, seted up installation passageway 11 on the mount pad 1, input seat subassembly 2 sliding connection is in installation passageway 11 to be used for installing input optical fiber 7, lens subassembly 3 sets up in installation passageway 11, is used for carrying out the coupling to the light of 7 outputs of input optical fiber, and on first adjusting part 4 worn to locate mount pad 1, the one end and the input seat subassembly 2 butt in the installation passageway 11 of stretching into of first adjusting part 4, with fixed input seat subassembly 2. The lens assembly 3 and the input seat assembly 2 are arranged in the mounting channel 11, so that the lens assembly 3 and the input seat assembly 2 work on the same central line. The specific working principle is as follows:

because the position of focus can be influenced to the error that lens and other parts produced when the equipment, because input seat subassembly 2 is used for installing input fiber 7, through loosening first adjusting part 4, and move input seat subassembly 2, thereby drive input fiber 7 and be close to or keep away from lens subassembly 3, so that the transmission end of input fiber 7 is in the focus of lens subassembly 3, thereby improved the transmission efficiency of input fiber 7, after adjusting the position of input seat, make first adjusting part 4 butt this input seat subassembly 2, thereby fix this input seat subassembly 2.

Compared with the prior art, the optical fiber coupler provided by the invention has the advantages that the input seat assembly 2 can slide along the installation channel 11, so that the distance between the input optical fiber 7 and the lens assembly 3 is adjusted, the transmitting end of the input optical fiber 7 is positioned at the focal point of the lens assembly 3, the transmission efficiency of the input optical fiber 7 is improved, the first adjusting assembly 4 can loosen or tightly abut against the input seat assembly 2, the input seat assembly 2 can slide in the installation channel 11 or the input seat assembly 2 can be fixed in the installation seat 1, the problem that the position of the focal point is influenced by errors generated when the existing coupler lens and other components are assembled is solved, and the transmission efficiency is improved.

It should be noted that the focus is not a fixed point, and the focus is re-determined according to the laser frequency applied each time, and the determination of the focus is affected each time the error of assembling parts is different, so that the distance between the input end of the optical fiber 7 and the lens assembly 3, i.e. the distance between the input seat assembly 2 and the lens assembly 3, needs to be re-input.

In another embodiment of the present invention, referring to fig. 2 and 5, the first adjusting assembly 4 includes a first mounting plate 41 and a first adjusting bolt 42. Wherein, first mounting panel 41 sets up on mount pad 1, and on first mounting panel 41 and mount pad 1 were worn to locate in proper order by first adjusting bolt 42, the threaded end of first adjusting bolt 42 stretched into in the installation passageway 11 to make the threaded end and the input seat subassembly 2 butt of first adjusting bolt 42. The first adjusting bolt 42 is screwed with the first mounting plate 41 and the mounting base 1, and the input base assembly 2 can be loosened or pressed tightly by rotating the first adjusting bolt 42, so that the input base assembly 2 can slide in the mounting channel 11, or the input base assembly 2 can be fixed at a certain position.

In another embodiment of the present invention, referring to fig. 1 to 4, the lens assembly 3 is slidably connected in the mounting channel 11, and the optical fiber coupler further includes a second adjusting assembly 5, wherein an end of the second adjusting assembly 5 extending into the mounting channel 11 is connected to the lens assembly 3, thereby fixing the lens assembly 3. The lens assembly 3 is slidably connected in the mounting channel 11, and the distance between the lens assembly 3 and the input base assembly 2 can be finely adjusted. When the second adjusting assembly 5 is disconnected from the lens assembly 3, the lens assembly 3 can slide in the mounting channel 11, and when the second adjusting assembly 5 is connected to the lens assembly 3, the lens assembly 3 is fixed at a fixed position.

Specifically, in the present embodiment, the second adjustment assembly 5 includes a second mounting plate 51 and a second adjustment bolt 52. The second mounting plate 51 is disposed on the mounting base 1, the second adjusting bolt 52 is disposed on the second mounting plate 51 and the mounting base 1 in a penetrating manner, and a threaded end of the second adjusting bolt 52 extends into the mounting channel 11 and is in threaded connection with the lens assembly 3. The lens assembly 3 can be loosened by rotating the second adjusting bolt 52, so that the lens assembly 3 can slide in the mounting channel 11, and after the position between the lens assembly 3 and the input seat assembly 2 is adjusted, the second adjusting bolt 52 can be connected with the lens assembly 3 when the second adjusting bolt 52 is rotated reversely, so that the position of the lens assembly 3 is fixed.

In another embodiment of the present invention, with further reference to fig. 2, 4 and 6, the optical signal from the laser enters the optical fiber in two ways: direct coupling and lens coupling. The lens coupling is divided into single lens coupling and multi-lens coupling, so that the coupling efficiency higher than that of direct coupling can be obtained due to the lens coupling, tolerance can be dispersed by adopting double-lens coupling, elements on a light path can have larger displacement space, the coupling efficiency can reach 96%, and the heating and external radiation of the coupler caused by energy loss generated by coupling are effectively reduced.

Specifically, the lens assembly 3 includes a connecting base 31, a first lens 32, and a second lens 33. Wherein, the connecting seat 31 has a mounting hole 310 therein, the first lens 32 is disposed in the mounting hole 310 and located at a side close to the input seat assembly 2, and the first lens 32 is used for collimating light. The second lens 33 is disposed in the mounting hole 310 and located at a side away from the input socket assembly 2, and the second lens 33 is used for collecting light.

With further reference to fig. 8, the laser focused by the input fiber 7 is first changed into a parallel collimated light beam by the first lens 32, and then focused by the second lens 33 for output. The first lens 32 and the second lens 33 are plano-convex lenses, and the convex surface of the first lens 32 and the convex surface of the second lens 33 are oppositely arranged and respectively used as an output surface and an input surface. Specifically, the first lens 32 is disposed as a planar end face toward the input optical fiber 7, i.e., as an input face, and the first lens 32 is disposed as a convex end face away from the input optical fiber 7, i.e., as an output face; the second lens 33 is arranged as a convex end face towards the input fiber 7, i.e. as an input face, and the second lens 33 is arranged as a planar end face away from the input fiber 7, i.e. as an output face.

In another embodiment of the present invention, referring to fig. 1 to 4, two end surfaces of the first lens 32 are respectively coated with an antireflection film (not shown), two end surfaces of the second lens 33 are respectively coated with an antireflection film, that is, a plane and a convex surface of the first lens 32 are respectively coated with an antireflection film, and a plane and a convex surface of the second lens 33 are respectively coated with an antireflection film. Specifically, the antireflection film is an HE coating, and the transmittance of the lens coated with the antireflection film is good. Transmission is an emergence phenomenon in which incident light passes through an object by refraction, and transmittance refers to the degree to which a transparent body transmits light. Further referring to fig. 9, where L1 in fig. 9 is a spectrum of the lens incident surface coated with the antireflection film, L2 is a spectrum of the lens exit surface coated with the antireflection film, the wavelength of the antireflection film is 420 nm and 1100nm, and the transmittance of the antireflection film is relatively good.

In another embodiment of the present invention, the focal length of the first lens 32 is greater than the focal length of the second lens 33. Since the first lens 32 is close to the input seat assembly 2, the focal length of the first lens 32 is greater than that of the second lens 33, so that the distance between the input seat assembly 2 and the first lens 32 can be adjusted conveniently, the adjustable range is large, and the transmission efficiency is good. The focal length of the first lens 32 is between 20-30mm, and the focal length of the second lens 33 is between 3-15 mm. Preferably, the focal length of the first lens 32 is 25mm, and the focal length of the second lens 33 is 8 mm.

Further, with further reference to fig. 6, the lens assembly 3 further comprises spacer pillars 34. The spacer 34 is disposed in the mounting hole 310 and located between the first lens 32 and the second lens 33, two ends of the spacer 34 are respectively abutted against the first lens 32 and the second lens 33, and an optical path channel 340 is formed in the spacer 34.

Further, the lens assembly further comprises a third mounting plate 35 and a resilient member 36. The third mounting plate 35 is disposed on a side of the mounting base 1 facing the input base assembly 2, and is fixedly connected to the mounting base 1. The elastic member 36 is located between the mounting plate and the first lens 32 for abutting against the first lens 32 and the second lens 33. The third mounting plate 35 is fixedly connected with the mounting base 1 through a first bolt 37, and the elastic member 36 is used for pressing the first lens 32, the spacing column 34 and the second lens 33, so that in the vibration process, the lenses are not easy to deviate from the set positions, and the elastic member 36 always presses the first lens 32.

Specifically, in this embodiment, the elastic member 36 is a wave spring, and the wave spring is an elastic element having a plurality of peaks and valleys on a metal thin circular ring, and has the advantages of high strength, good flexibility, impact resistance, and the like. The stress is relatively uniform, and the elasticity is not easy to disappear after long-term compression.

In another embodiment of the present invention, referring to fig. 2 and 8, the fiber coupler further includes an output assembly 6, and the output assembly 6 is connected to the end surface of the mounting base 1 away from the input base assembly 2 for mounting an output fiber 8.

Specifically, in the present embodiment, the output member 6 includes an output panel 61 connected to the mount 1, an output plug 63 inserted on the output panel 61, and a spring piece 62 located between the output panel 61 and the mount 1. The spring plate 62 is provided with a position switch (not shown), and when the output optical fiber 8 is inserted into the output plug 63, the position switch on the spring plate 62 is pressed, so that whether the output optical fiber 8 is installed in place can be judged according to whether the position switch is in place.

Further, referring to fig. 7, the input socket assembly 2 includes a socket body 21, an input plug 22 and a mounting spring 23. The seat body 21 is located in the installation channel 11 and slidably connected in the installation channel 11, and the first adjusting component 4 is used for abutting against the seat body 21. One end of the input plug 22 is inserted into the seat body 21, the other end of the input plug 22 passes through the mounting spring 23, and the mounting spring 23 is fixedly connected with the seat body 21 through the second bolt 24, so that the input plug 22 is mounted on the seat body 21. The input optical fiber 7 is screwed to the input plug 22.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. An optical fiber coupler, characterized by: the method comprises the following steps:

the mounting seat is provided with a mounting channel;

a lens assembly disposed within the mounting channel; and

2. The fiber optic coupler of claim 1, wherein: the first adjustment assembly includes:

the first mounting plate is arranged on the mounting seat; and

3. The fiber optic coupler of claim 1, wherein: the lens assembly is slidably connected in the installation channel, and the optical fiber coupler further comprises:

the second adjusting component penetrates through the mounting seat, and one end of the second adjusting component, which extends into the mounting channel, is connected with the lens component so as to fix the lens component.

4. The fiber optic coupler of claim 3, wherein: the second adjustment assembly includes:

the second mounting plate is arranged on the mounting seat; and

5. The fiber optic coupler of any of claims 1-4, wherein: the lens assembly includes:

the connecting seat is internally provided with a mounting hole;

6. The fiber optic coupler of claim 5, wherein: antireflection films are coated on two end faces of the first lens respectively, and antireflection films are coated on two end faces of the second lens respectively.

7. The fiber optic coupler of claim 5, wherein: the focal length of the first lens is larger than that of the second lens.

8. The fiber optic coupler of claim 5, wherein: the lens assembly further includes:

and the spacing column is arranged in the mounting hole and is positioned between the first lens and the second lens, two ends of the spacing column are respectively abutted against the first lens and the second lens, and a light path channel is formed in the spacing column.

9. The fiber optic coupler of claim 8, wherein: the terminal surface of keeping away from the input seat subassembly of second lens with the inner wall butt of mount pad, the lens subassembly still includes:

the third mounting plate is arranged on one side, facing the input seat assembly, of the mounting seat and is fixedly connected with the mounting seat; and

10. The fiber optic coupler of any of claims 1-4, wherein: the optical fiber coupler further includes: